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- Committer: Björn Påhlsson
- Date: 2011-09-24 14:11:08 UTC
- mto: This revision was merged to the branch mainline in revision 502.
- Revision ID: belorn@fukt.bsnet.se-20110924141108-uejkiva9fqwt8il8
Refactoring code related to PropertyChanged dbus signal. Made sending
PropertyChanged signal to a python properties of interval variables.
PropertyChanged signal to a python properties of interval variables.
- 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
# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
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 © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
import unittest
81
import random
82
import shlex
83
65
84
66
import dbus
85
67
import dbus.service
86
import gi
87
from gi.repository import GLib
68
import gobject
69
import avahi
88
70
from dbus.mainloop.glib import DBusGMainLoop
89
71
import ctypes
90
72
import ctypes.util
91
73
import xml.dom.minidom
92
74
import inspect
93
75
94
if sys.version_info.major == 2:
95
__metaclass__ = type
96
str = unicode
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:
76
try:
122
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
78
except AttributeError:
124
79
try:
125
# This is where SO_BINDTODEVICE was up to and including Python
126
# 2.6, and also 3.2:
127
80
from IN import SO_BINDTODEVICE
128
81
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 = "1.8.9"
147
stored_state_file = "clients.pickle"
148
149
logger = logging.getLogger()
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
logger.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
logger.addHandler(console)
203
logger.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
330
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
331
102
332
103
class AvahiError(Exception):
333
104
def __init__(self, value, *args, **kwargs):
334
105
self.value = value
335
return super(AvahiError, self).__init__(value, *args,
336
**kwargs)
337
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
338
109
339
110
class AvahiServiceError(AvahiError):
340
111
pass
341
112
342
343
113
class AvahiGroupError(AvahiError):
344
114
pass
345
115
346
116
347
class AvahiService:
117
class AvahiService(object):
348
118
"""An Avahi (Zeroconf) service.
349
119
350
120
Attributes:
351
121
interface: integer; avahi.IF_UNSPEC or an interface index.
352
122
Used to optionally bind to the specified interface.
353
123
name: string; Example: 'Mandos'
354
124
type: string; Example: '_mandos._tcp'.
355
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
356
126
port: integer; what port to announce
357
127
TXT: list of strings; TXT record for the service
358
128
domain: string; Domain to publish on, default to .local if empty.
364
134
server: D-Bus Server
365
135
bus: dbus.SystemBus()
366
136
"""
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):
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
379
141
self.interface = interface
380
142
self.name = name
381
143
self.type = servicetype
390
152
self.server = None
391
153
self.bus = bus
392
154
self.entry_group_state_changed_match = None
393
394
def rename(self, remove=True):
155
def rename(self):
395
156
"""Derived from the Avahi example code"""
396
157
if self.rename_count >= self.max_renames:
397
158
logger.critical("No suitable Zeroconf service name found"
398
159
" after %i retries, exiting.",
399
160
self.rename_count)
400
161
raise AvahiServiceError("Too many renames")
401
self.name = str(
402
self.server.GetAlternativeServiceName(self.name))
403
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
404
163
logger.info("Changing Zeroconf service name to %r ...",
405
164
self.name)
406
if remove:
407
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
408
170
try:
409
171
self.add()
410
172
except dbus.exceptions.DBusException as error:
411
if (error.get_dbus_name()
412
== "org.freedesktop.Avahi.CollisionError"):
413
logger.info("Local Zeroconf service name collision.")
414
return self.rename(remove=False)
415
else:
416
logger.critical("D-Bus Exception", exc_info=error)
417
self.cleanup()
418
os._exit(1)
419
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
420
177
def remove(self):
421
178
"""Derived from the Avahi example code"""
422
179
if self.entry_group_state_changed_match is not None:
424
181
self.entry_group_state_changed_match = None
425
182
if self.group is not None:
426
183
self.group.Reset()
427
428
184
def add(self):
429
185
"""Derived from the Avahi example code"""
430
186
self.remove()
435
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
436
192
self.entry_group_state_changed_match = (
437
193
self.group.connect_to_signal(
438
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
439
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
440
196
self.name, self.type)
441
197
self.group.AddService(
447
203
dbus.UInt16(self.port),
448
204
avahi.string_array_to_txt_array(self.TXT))
449
205
self.group.Commit()
450
451
206
def entry_group_state_changed(self, state, error):
452
207
"""Derived from the Avahi example code"""
453
208
logger.debug("Avahi entry group state change: %i", state)
454
209
455
210
if state == avahi.ENTRY_GROUP_ESTABLISHED:
456
211
logger.debug("Zeroconf service established.")
457
212
elif state == avahi.ENTRY_GROUP_COLLISION:
459
214
self.rename()
460
215
elif state == avahi.ENTRY_GROUP_FAILURE:
461
216
logger.critical("Avahi: Error in group state changed %s",
462
str(error))
463
raise AvahiGroupError("State changed: {!s}".format(error))
464
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
465
220
def cleanup(self):
466
221
"""Derived from the Avahi example code"""
467
222
if self.group is not None:
468
223
try:
469
224
self.group.Free()
470
225
except (dbus.exceptions.UnknownMethodException,
471
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
472
227
pass
473
228
self.group = None
474
229
self.remove()
475
476
230
def server_state_changed(self, state, error=None):
477
231
"""Derived from the Avahi example code"""
478
232
logger.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
}
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
485
240
if state in bad_states:
486
241
if bad_states[state] is not None:
487
242
if error is None:
490
245
logger.error(bad_states[state] + ": %r", error)
491
246
self.cleanup()
492
247
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
logger.info("Local Zeroconf service name"
499
" collision.")
500
return self.rename(remove=False)
501
else:
502
logger.critical("D-Bus Exception", exc_info=error)
503
self.cleanup()
504
os._exit(1)
248
self.add()
505
249
else:
506
250
if error is None:
507
251
logger.debug("Unknown state: %r", state)
508
252
else:
509
253
logger.debug("Unknown state: %r: %r", state, error)
510
511
254
def activate(self):
512
255
"""Derived from the Avahi example code"""
513
256
if self.server is None:
517
260
follow_name_owner_changes=True),
518
261
avahi.DBUS_INTERFACE_SERVER)
519
262
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
263
self.server_state_changed)
521
264
self.server_state_changed(self.server.GetState())
522
265
523
266
524
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
528
syslogger.setFormatter(logging.Formatter(
529
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
530
.format(self.name)))
531
return ret
532
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)
597
return super(gnutls.Error, self).__init__(
598
message, *args)
599
600
class CertificateSecurityError(Error):
601
pass
602
603
# Classes
604
class Credentials:
605
def __init__(self):
606
self._c_object = gnutls.certificate_credentials_t()
607
gnutls.certificate_allocate_credentials(
608
ctypes.byref(self._c_object))
609
self.type = gnutls.CRD_CERTIFICATE
610
611
def __del__(self):
612
gnutls.certificate_free_credentials(self._c_object)
613
614
class ClientSession:
615
def __init__(self, socket, credentials=None):
616
self._c_object = gnutls.session_t()
617
gnutls_flags = gnutls.CLIENT
618
if gnutls.check_version(b"3.5.6"):
619
gnutls_flags |= gnutls.NO_TICKETS
620
if gnutls.has_rawpk:
621
gnutls_flags |= gnutls.ENABLE_RAWPK
622
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
623
del gnutls_flags
624
gnutls.set_default_priority(self._c_object)
625
gnutls.transport_set_ptr(self._c_object, socket.fileno())
626
gnutls.handshake_set_private_extensions(self._c_object,
627
True)
628
self.socket = socket
629
if credentials is None:
630
credentials = gnutls.Credentials()
631
gnutls.credentials_set(self._c_object, credentials.type,
632
ctypes.cast(credentials._c_object,
633
ctypes.c_void_p))
634
self.credentials = credentials
635
636
def __del__(self):
637
gnutls.deinit(self._c_object)
638
639
def handshake(self):
640
return gnutls.handshake(self._c_object)
641
642
def send(self, data):
643
data = bytes(data)
644
data_len = len(data)
645
while data_len > 0:
646
data_len -= gnutls.record_send(self._c_object,
647
data[-data_len:],
648
data_len)
649
650
def bye(self):
651
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
652
653
# Error handling functions
654
def _error_code(result):
655
"""A function to raise exceptions on errors, suitable
656
for the 'restype' attribute on ctypes functions"""
657
if result >= 0:
658
return result
659
if result == gnutls.E_NO_CERTIFICATE_FOUND:
660
raise gnutls.CertificateSecurityError(code=result)
661
raise gnutls.Error(code=result)
662
663
def _retry_on_error(result, func, arguments):
664
"""A function to retry on some errors, suitable
665
for the 'errcheck' attribute on ctypes functions"""
666
while result < 0:
667
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
668
return _error_code(result)
669
result = func(*arguments)
670
return result
671
672
# Unless otherwise indicated, the function declarations below are
673
# all from the gnutls/gnutls.h C header file.
674
675
# Functions
676
priority_set_direct = _library.gnutls_priority_set_direct
677
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
678
ctypes.POINTER(ctypes.c_char_p)]
679
priority_set_direct.restype = _error_code
680
681
init = _library.gnutls_init
682
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
683
init.restype = _error_code
684
685
set_default_priority = _library.gnutls_set_default_priority
686
set_default_priority.argtypes = [session_t]
687
set_default_priority.restype = _error_code
688
689
record_send = _library.gnutls_record_send
690
record_send.argtypes = [session_t, ctypes.c_void_p,
691
ctypes.c_size_t]
692
record_send.restype = ctypes.c_ssize_t
693
record_send.errcheck = _retry_on_error
694
695
certificate_allocate_credentials = (
696
_library.gnutls_certificate_allocate_credentials)
697
certificate_allocate_credentials.argtypes = [
698
ctypes.POINTER(certificate_credentials_t)]
699
certificate_allocate_credentials.restype = _error_code
700
701
certificate_free_credentials = (
702
_library.gnutls_certificate_free_credentials)
703
certificate_free_credentials.argtypes = [
704
certificate_credentials_t]
705
certificate_free_credentials.restype = None
706
707
handshake_set_private_extensions = (
708
_library.gnutls_handshake_set_private_extensions)
709
handshake_set_private_extensions.argtypes = [session_t,
710
ctypes.c_int]
711
handshake_set_private_extensions.restype = None
712
713
credentials_set = _library.gnutls_credentials_set
714
credentials_set.argtypes = [session_t, credentials_type_t,
715
ctypes.c_void_p]
716
credentials_set.restype = _error_code
717
718
strerror = _library.gnutls_strerror
719
strerror.argtypes = [ctypes.c_int]
720
strerror.restype = ctypes.c_char_p
721
722
certificate_type_get = _library.gnutls_certificate_type_get
723
certificate_type_get.argtypes = [session_t]
724
certificate_type_get.restype = _error_code
725
726
certificate_get_peers = _library.gnutls_certificate_get_peers
727
certificate_get_peers.argtypes = [session_t,
728
ctypes.POINTER(ctypes.c_uint)]
729
certificate_get_peers.restype = ctypes.POINTER(datum_t)
730
731
global_set_log_level = _library.gnutls_global_set_log_level
732
global_set_log_level.argtypes = [ctypes.c_int]
733
global_set_log_level.restype = None
734
735
global_set_log_function = _library.gnutls_global_set_log_function
736
global_set_log_function.argtypes = [log_func]
737
global_set_log_function.restype = None
738
739
deinit = _library.gnutls_deinit
740
deinit.argtypes = [session_t]
741
deinit.restype = None
742
743
handshake = _library.gnutls_handshake
744
handshake.argtypes = [session_t]
745
handshake.restype = _error_code
746
handshake.errcheck = _retry_on_error
747
748
transport_set_ptr = _library.gnutls_transport_set_ptr
749
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
750
transport_set_ptr.restype = None
751
752
bye = _library.gnutls_bye
753
bye.argtypes = [session_t, close_request_t]
754
bye.restype = _error_code
755
bye.errcheck = _retry_on_error
756
757
check_version = _library.gnutls_check_version
758
check_version.argtypes = [ctypes.c_char_p]
759
check_version.restype = ctypes.c_char_p
760
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
765
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
768
769
if has_rawpk:
770
# Types
771
class pubkey_st(ctypes.Structure):
772
_fields = []
773
pubkey_t = ctypes.POINTER(pubkey_st)
774
775
x509_crt_fmt_t = ctypes.c_int
776
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
781
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
784
x509_crt_fmt_t]
785
pubkey_import.restype = _error_code
786
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
792
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
796
else:
797
# All the function declarations below are from gnutls/openpgp.h
798
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
802
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
806
openpgp_crt_fmt_t]
807
openpgp_crt_import.restype = _error_code
808
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
813
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
817
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
821
ctypes.c_void_p,
822
ctypes.POINTER(
823
ctypes.c_size_t)]
824
openpgp_crt_get_fingerprint.restype = _error_code
825
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
830
831
# Remove non-public functions
832
del _error_code, _retry_on_error
833
834
835
def call_pipe(connection, # : multiprocessing.Connection
836
func, *args, **kwargs):
837
"""This function is meant to be called by multiprocessing.Process
838
839
This function runs func(*args, **kwargs), and writes the resulting
840
return value on the provided multiprocessing.Connection.
841
"""
842
connection.send(func(*args, **kwargs))
843
connection.close()
844
845
846
class Client:
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
273
class Client(object):
847
274
"""A representation of a client host served by this server.
848
275
849
276
Attributes:
850
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
851
278
approval_delay: datetime.timedelta(); Time to wait for approval
852
279
approval_duration: datetime.timedelta(); Duration of one approval
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
855
running.
856
checker_callback_tag: a GLib event source tag, or None
280
checker: subprocess.Popen(); a running checker process used
281
to see if the client lives.
282
'None' if no process is running.
283
checker_callback_tag: a gobject event source tag, or None
857
284
checker_command: string; External command which is run to check
858
285
if client lives. %() expansions are done at
859
286
runtime with vars(self) as dict, so that for
860
287
instance %(name)s can be used in the command.
861
checker_initiator_tag: a GLib event source tag, or None
288
checker_initiator_tag: a gobject event source tag, or None
862
289
created: datetime.datetime(); (UTC) object creation
863
client_structure: Object describing what attributes a client has
864
and is used for storing the client at exit
865
290
current_checker_command: string; current running checker_command
866
disable_initiator_tag: a GLib event source tag, or None
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
867
293
enabled: bool()
868
294
fingerprint: string (40 or 32 hexadecimal digits); used to
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
295
uniquely identify the client
872
296
host: string; available for use by the checker command
873
297
interval: datetime.timedelta(); How often to start a new checker
874
298
last_approval_request: datetime.datetime(); (UTC) or None
875
299
last_checked_ok: datetime.datetime(); (UTC) or None
876
last_checker_status: integer between 0 and 255 reflecting exit
877
status of last checker. -1 reflects crashed
878
checker, -2 means no checker completed yet.
879
last_checker_signal: The signal which killed the last checker, if
880
last_checker_status is -1
881
last_enabled: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
882
301
name: string; from the config file, used in log messages and
883
302
D-Bus identifiers
884
303
secret: bytestring; sent verbatim (over TLS) to client
885
304
timeout: datetime.timedelta(); How long from last_checked_ok
886
305
until this client is disabled
887
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
888
307
runtime_expansions: Allowed attributes for runtime expansion.
889
308
expires: datetime.datetime(); time (UTC) when a client will be
890
309
disabled, or None
891
server_settings: The server_settings dict from main()
892
310
"""
893
311
894
312
runtime_expansions = ("approval_delay", "approval_duration",
895
"created", "enabled", "expires", "key_id",
896
"fingerprint", "host", "interval",
897
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
898
315
"last_enabled", "name", "timeout")
899
client_defaults = {
900
"timeout": "PT5M",
901
"extended_timeout": "PT15M",
902
"interval": "PT2M",
903
"checker": "fping -q -- %%(host)s",
904
"host": "",
905
"approval_delay": "PT0S",
906
"approval_duration": "PT1S",
907
"approved_by_default": "True",
908
"enabled": "True",
909
}
910
911
@staticmethod
912
def config_parser(config):
913
"""Construct a new dict of client settings of this form:
914
{ client_name: {setting_name: value, ...}, ...}
915
with exceptions for any special settings as defined above.
916
NOTE: Must be a pure function. Must return the same result
917
value given the same arguments.
918
"""
919
settings = {}
920
for client_name in config.sections():
921
section = dict(config.items(client_name))
922
client = settings[client_name] = {}
923
924
client["host"] = section["host"]
925
# Reformat values from string types to Python types
926
client["approved_by_default"] = config.getboolean(
927
client_name, "approved_by_default")
928
client["enabled"] = config.getboolean(client_name,
929
"enabled")
930
931
# Uppercase and remove spaces from key_id and fingerprint
932
# for later comparison purposes with return value from the
933
# key_id() and fingerprint() functions
934
client["key_id"] = (section.get("key_id", "").upper()
935
.replace(" ", ""))
936
client["fingerprint"] = (section["fingerprint"].upper()
937
.replace(" ", ""))
938
if "secret" in section:
939
client["secret"] = codecs.decode(section["secret"]
940
.encode("utf-8"),
941
"base64")
942
elif "secfile" in section:
943
with open(os.path.expanduser(os.path.expandvars
944
(section["secfile"])),
945
"rb") as secfile:
946
client["secret"] = secfile.read()
947
else:
948
raise TypeError("No secret or secfile for section {}"
949
.format(section))
950
client["timeout"] = string_to_delta(section["timeout"])
951
client["extended_timeout"] = string_to_delta(
952
section["extended_timeout"])
953
client["interval"] = string_to_delta(section["interval"])
954
client["approval_delay"] = string_to_delta(
955
section["approval_delay"])
956
client["approval_duration"] = string_to_delta(
957
section["approval_duration"])
958
client["checker_command"] = section["checker"]
959
client["last_approval_request"] = None
960
client["last_checked_ok"] = None
961
client["last_checker_status"] = -2
962
963
return settings
964
965
def __init__(self, settings, name=None, server_settings=None):
316
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
966
336
self.name = name
967
if server_settings is None:
968
server_settings = {}
969
self.server_settings = server_settings
970
# adding all client settings
971
for setting, value in settings.items():
972
setattr(self, setting, value)
973
974
if self.enabled:
975
if not hasattr(self, "last_enabled"):
976
self.last_enabled = datetime.datetime.utcnow()
977
if not hasattr(self, "expires"):
978
self.expires = (datetime.datetime.utcnow()
979
+ self.timeout)
980
else:
981
self.last_enabled = None
982
self.expires = None
983
337
if config is None:
338
config = {}
984
339
logger.debug("Creating client %r", self.name)
985
logger.debug(" Key ID: %s", self.key_id)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
986
345
logger.debug(" Fingerprint: %s", self.fingerprint)
987
self.created = settings.get("created",
988
datetime.datetime.utcnow())
989
990
# attributes specific for this server instance
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
991
366
self.checker = None
992
367
self.checker_initiator_tag = None
993
368
self.disable_initiator_tag = None
369
self.expires = None
994
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
995
372
self.current_checker_command = None
996
self.approved = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
997
377
self.approvals_pending = 0
998
self.changedstate = multiprocessing_manager.Condition(
999
multiprocessing_manager.Lock())
1000
self.client_structure = [attr
1001
for attr in self.__dict__.keys()
1002
if not attr.startswith("_")]
1003
self.client_structure.append("client_structure")
1004
1005
for name, t in inspect.getmembers(
1006
type(self), lambda obj: isinstance(obj, property)):
1007
if not name.startswith("_"):
1008
self.client_structure.append(name)
1009
1010
# Send notice to process children that client state has changed
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
383
1011
384
def send_changedstate(self):
1012
with self.changedstate:
1013
self.changedstate.notify_all()
1014
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
1015
389
def enable(self):
1016
390
"""Start this client's checker and timeout hooks"""
1017
391
if getattr(self, "enabled", False):
1018
392
# Already enabled
1019
393
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
1020
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
1021
405
self.enabled = True
1022
406
self.last_enabled = datetime.datetime.utcnow()
1023
self.init_checker()
1024
self.send_changedstate()
1025
407
# Also start a new checker *right now*.
408
self.start_checker()
409
1026
410
def disable(self, quiet=True):
1027
411
"""Disable this client."""
1028
412
if not getattr(self, "enabled", False):
1029
413
return False
1030
414
if not quiet:
415
self.send_changedstate()
416
if not quiet:
1031
417
logger.info("Disabling client %s", self.name)
1032
if getattr(self, "disable_initiator_tag", None) is not None:
1033
GLib.source_remove(self.disable_initiator_tag)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
1034
420
self.disable_initiator_tag = None
1035
421
self.expires = None
1036
if getattr(self, "checker_initiator_tag", None) is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
422
if getattr(self, "checker_initiator_tag", False):
423
gobject.source_remove(self.checker_initiator_tag)
1038
424
self.checker_initiator_tag = None
1039
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
1040
428
self.enabled = False
1041
if not quiet:
1042
self.send_changedstate()
1043
# Do not run this again if called by a GLib.timeout_add
429
# Do not run this again if called by a gobject.timeout_add
1044
430
return False
1045
431
1046
432
def __del__(self):
433
self.disable_hook = None
1047
434
self.disable()
1048
1049
def init_checker(self):
1050
# Schedule a new checker to be started an 'interval' from now,
1051
# and every interval from then on.
1052
if self.checker_initiator_tag is not None:
1053
GLib.source_remove(self.checker_initiator_tag)
1054
self.checker_initiator_tag = GLib.timeout_add(
1055
random.randrange(int(self.interval.total_seconds() * 1000
1056
+ 1)),
1057
self.start_checker)
1058
# Schedule a disable() when 'timeout' has passed
1059
if self.disable_initiator_tag is not None:
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
1062
int(self.timeout.total_seconds() * 1000), self.disable)
1063
# Also start a new checker *right now*.
1064
self.start_checker()
1065
1066
def checker_callback(self, source, condition, connection,
1067
command):
435
436
def checker_callback(self, pid, condition, command):
1068
437
"""The checker has completed, so take appropriate actions."""
1069
# Read return code from connection (see call_pipe)
1070
returncode = connection.recv()
1071
connection.close()
1072
if self.checker is not None:
1073
self.checker.join()
1074
438
self.checker_callback_tag = None
1075
439
self.checker = None
1076
1077
if returncode >= 0:
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
1080
if self.last_checker_status == 0:
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
1081
443
logger.info("Checker for %(name)s succeeded",
1082
444
vars(self))
1083
445
self.checked_ok()
1084
446
else:
1085
logger.info("Checker for %(name)s failed", vars(self))
447
logger.info("Checker for %(name)s failed",
448
vars(self))
1086
449
else:
1087
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
1089
450
logger.warning("Checker for %(name)s crashed?",
1090
451
vars(self))
1091
return False
1092
1093
def checked_ok(self):
1094
"""Assert that the client has been seen, alive and well."""
1095
self.last_checked_ok = datetime.datetime.utcnow()
1096
self.last_checker_status = 0
1097
self.last_checker_signal = None
1098
self.bump_timeout()
1099
1100
def bump_timeout(self, timeout=None):
1101
"""Bump up the timeout for this client."""
452
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
1102
459
if timeout is None:
1103
460
timeout = self.timeout
1104
if self.disable_initiator_tag is not None:
1105
GLib.source_remove(self.disable_initiator_tag)
1106
self.disable_initiator_tag = None
1107
if getattr(self, "enabled", False):
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
1110
self.expires = datetime.datetime.utcnow() + timeout
1111
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
467
1112
468
def need_approval(self):
1113
469
self.last_approval_request = datetime.datetime.utcnow()
1114
470
1115
471
def start_checker(self):
1116
472
"""Start a new checker subprocess if one is not running.
1117
473
1118
474
If a checker already exists, leave it running and do
1119
475
nothing."""
1120
476
# The reason for not killing a running checker is that if we
1121
# did that, and if a checker (for some reason) started running
1122
# slowly and taking more than 'interval' time, then the client
1123
# would inevitably timeout, since no checker would get a
1124
# chance to run to completion. If we instead leave running
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
1125
481
# checkers alone, the checker would have to take more time
1126
482
# than 'timeout' for the client to be disabled, which is as it
1127
483
# should be.
1128
1129
if self.checker is not None and not self.checker.is_alive():
1130
logger.warning("Checker was not alive; joining")
1131
self.checker.join()
1132
self.checker = None
484
485
# If a checker exists, make sure it is not a zombie
486
try:
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
492
else:
493
if pid:
494
logger.warning("Checker was a zombie")
495
gobject.source_remove(self.checker_callback_tag)
496
self.checker_callback(pid, status,
497
self.current_checker_command)
1133
498
# Start a new checker if needed
1134
499
if self.checker is None:
1135
# Escape attributes for the shell
1136
escaped_attrs = {
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
1139
500
try:
1140
command = self.checker_command % escaped_attrs
1141
except TypeError as error:
1142
logger.error('Could not format string "%s"',
1143
self.checker_command,
1144
exc_info=error)
1145
return True # Try again later
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
1146
519
self.current_checker_command = command
1147
logger.info("Starting checker %r for %s", command,
1148
self.name)
1149
# We don't need to redirect stdout and stderr, since
1150
# in normal mode, that is already done by daemon(),
1151
# and in debug mode we don't want to. (Stdin is
1152
# always replaced by /dev/null.)
1153
# The exception is when not debugging but nevertheless
1154
# running in the foreground; use the previously
1155
# created wnull.
1156
popen_args = {"close_fds": True,
1157
"shell": True,
1158
"cwd": "/"}
1159
if (not self.server_settings["debug"]
1160
and self.server_settings["foreground"]):
1161
popen_args.update({"stdout": wnull,
1162
"stderr": wnull})
1163
pipe = multiprocessing.Pipe(duplex=False)
1164
self.checker = multiprocessing.Process(
1165
target=call_pipe,
1166
args=(pipe[1], subprocess.call, command),
1167
kwargs=popen_args)
1168
self.checker.start()
1169
self.checker_callback_tag = GLib.io_add_watch(
1170
GLib.IOChannel.unix_new(pipe[0].fileno()),
1171
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1172
self.checker_callback, pipe[0], command)
1173
# Re-run this periodically if run by GLib.timeout_add
520
try:
521
logger.info("Starting checker %r for %s",
522
command, self.name)
523
# We don't need to redirect stdout and stderr, since
524
# in normal mode, that is already done by daemon(),
525
# and in debug mode we don't want to. (Stdin is
526
# always replaced by /dev/null.)
527
self.checker = subprocess.Popen(command,
528
close_fds=True,
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
540
except OSError as error:
541
logger.error("Failed to start subprocess: %s",
542
error)
543
# Re-run this periodically if run by gobject.timeout_add
1174
544
return True
1175
545
1176
546
def stop_checker(self):
1177
547
"""Force the checker process, if any, to stop."""
1178
548
if self.checker_callback_tag:
1179
GLib.source_remove(self.checker_callback_tag)
549
gobject.source_remove(self.checker_callback_tag)
1180
550
self.checker_callback_tag = None
1181
551
if getattr(self, "checker", None) is None:
1182
552
return
1183
553
logger.debug("Stopping checker for %(name)s", vars(self))
1184
self.checker.terminate()
554
try:
555
os.kill(self.checker.pid, signal.SIGTERM)
556
#time.sleep(0.5)
557
#if self.checker.poll() is None:
558
# os.kill(self.checker.pid, signal.SIGKILL)
559
except OSError as error:
560
if error.errno != errno.ESRCH: # No such process
561
raise
1185
562
self.checker = None
1186
563
1187
1188
def dbus_service_property(dbus_interface,
1189
signature="v",
1190
access="readwrite",
1191
byte_arrays=False):
564
def dbus_service_property(dbus_interface, signature="v",
565
access="readwrite", byte_arrays=False):
1192
566
"""Decorators for marking methods of a DBusObjectWithProperties to
1193
567
become properties on the D-Bus.
1194
568
1195
569
The decorated method will be called with no arguments by "Get"
1196
570
and with one argument by "Set".
1197
571
1198
572
The parameters, where they are supported, are the same as
1199
573
dbus.service.method, except there is only "signature", since the
1200
574
type from Get() and the type sent to Set() is the same.
1203
577
# "Set" method, so we fail early here:
1204
578
if byte_arrays and signature != "ay":
1205
579
raise ValueError("Byte arrays not supported for non-'ay'"
1206
" signature {!r}".format(signature))
1207
580
" signature %r" % signature)
1208
581
def decorator(func):
1209
582
func._dbus_is_property = True
1210
583
func._dbus_interface = dbus_interface
1213
586
func._dbus_name = func.__name__
1214
587
if func._dbus_name.endswith("_dbus_property"):
1215
588
func._dbus_name = func._dbus_name[:-14]
1216
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1217
return func
1218
1219
return decorator
1220
1221
1222
def dbus_interface_annotations(dbus_interface):
1223
"""Decorator for marking functions returning interface annotations
1224
1225
Usage:
1226
1227
@dbus_interface_annotations("org.example.Interface")
1228
def _foo(self): # Function name does not matter
1229
return {"org.freedesktop.DBus.Deprecated": "true",
1230
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1231
"false"}
1232
"""
1233
1234
def decorator(func):
1235
func._dbus_is_interface = True
1236
func._dbus_interface = dbus_interface
1237
func._dbus_name = dbus_interface
1238
return func
1239
1240
return decorator
1241
1242
1243
def dbus_annotations(annotations):
1244
"""Decorator to annotate D-Bus methods, signals or properties
1245
Usage:
1246
1247
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1248
"org.freedesktop.DBus.Property."
1249
"EmitsChangedSignal": "false"})
1250
@dbus_service_property("org.example.Interface", signature="b",
1251
access="r")
1252
def Property_dbus_property(self):
1253
return dbus.Boolean(False)
1254
1255
See also the DBusObjectWithAnnotations class.
1256
"""
1257
1258
def decorator(func):
1259
func._dbus_annotations = annotations
1260
return func
1261
589
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
590
return func
1262
591
return decorator
1263
592
1264
593
1265
594
class DBusPropertyException(dbus.exceptions.DBusException):
1266
595
"""A base class for D-Bus property-related exceptions
1267
596
"""
1268
pass
597
def __unicode__(self):
598
return unicode(str(self))
1269
599
1270
600
1271
601
class DBusPropertyAccessException(DBusPropertyException):
1280
610
pass
1281
611
1282
612
1283
class DBusObjectWithAnnotations(dbus.service.Object):
1284
"""A D-Bus object with annotations.
1285
1286
Classes inheriting from this can use the dbus_annotations
1287
decorator to add annotations to methods or signals.
1288
"""
1289
1290
@staticmethod
1291
def _is_dbus_thing(thing):
1292
"""Returns a function testing if an attribute is a D-Bus thing
1293
1294
If called like _is_dbus_thing("method") it returns a function
1295
suitable for use as predicate to inspect.getmembers().
1296
"""
1297
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1298
False)
1299
1300
def _get_all_dbus_things(self, thing):
1301
"""Returns a generator of (name, attribute) pairs
1302
"""
1303
return ((getattr(athing.__get__(self), "_dbus_name", name),
1304
athing.__get__(self))
1305
for cls in self.__class__.__mro__
1306
for name, athing in
1307
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1308
1309
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1310
out_signature="s",
1311
path_keyword='object_path',
1312
connection_keyword='connection')
1313
def Introspect(self, object_path, connection):
1314
"""Overloading of standard D-Bus method.
1315
1316
Inserts annotation tags on methods and signals.
1317
"""
1318
xmlstring = dbus.service.Object.Introspect(self, object_path,
1319
connection)
1320
try:
1321
document = xml.dom.minidom.parseString(xmlstring)
1322
1323
for if_tag in document.getElementsByTagName("interface"):
1324
# Add annotation tags
1325
for typ in ("method", "signal"):
1326
for tag in if_tag.getElementsByTagName(typ):
1327
annots = dict()
1328
for name, prop in (self.
1329
_get_all_dbus_things(typ)):
1330
if (name == tag.getAttribute("name")
1331
and prop._dbus_interface
1332
== if_tag.getAttribute("name")):
1333
annots.update(getattr(
1334
prop, "_dbus_annotations", {}))
1335
for name, value in annots.items():
1336
ann_tag = document.createElement(
1337
"annotation")
1338
ann_tag.setAttribute("name", name)
1339
ann_tag.setAttribute("value", value)
1340
tag.appendChild(ann_tag)
1341
# Add interface annotation tags
1342
for annotation, value in dict(
1343
itertools.chain.from_iterable(
1344
annotations().items()
1345
for name, annotations
1346
in self._get_all_dbus_things("interface")
1347
if name == if_tag.getAttribute("name")
1348
)).items():
1349
ann_tag = document.createElement("annotation")
1350
ann_tag.setAttribute("name", annotation)
1351
ann_tag.setAttribute("value", value)
1352
if_tag.appendChild(ann_tag)
1353
# Fix argument name for the Introspect method itself
1354
if (if_tag.getAttribute("name")
1355
== dbus.INTROSPECTABLE_IFACE):
1356
for cn in if_tag.getElementsByTagName("method"):
1357
if cn.getAttribute("name") == "Introspect":
1358
for arg in cn.getElementsByTagName("arg"):
1359
if (arg.getAttribute("direction")
1360
== "out"):
1361
arg.setAttribute("name",
1362
"xml_data")
1363
xmlstring = document.toxml("utf-8")
1364
document.unlink()
1365
except (AttributeError, xml.dom.DOMException,
1366
xml.parsers.expat.ExpatError) as error:
1367
logger.error("Failed to override Introspection method",
1368
exc_info=error)
1369
return xmlstring
1370
1371
1372
class DBusObjectWithProperties(DBusObjectWithAnnotations):
613
class DBusObjectWithProperties(dbus.service.Object):
1373
614
"""A D-Bus object with properties.
1374
615
1375
616
Classes inheriting from this can use the dbus_service_property
1376
617
decorator to expose methods as D-Bus properties. It exposes the
1377
618
standard Get(), Set(), and GetAll() methods on the D-Bus.
1378
619
"""
1379
620
621
@staticmethod
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
624
625
def _get_all_dbus_properties(self):
626
"""Returns a generator of (name, attribute) pairs
627
"""
628
return ((prop._dbus_name, prop)
629
for name, prop in
630
inspect.getmembers(self, self._is_dbus_property))
631
1380
632
def _get_dbus_property(self, interface_name, property_name):
1381
633
"""Returns a bound method if one exists which is a D-Bus
1382
634
property with the specified name and interface.
1383
635
"""
1384
for cls in self.__class__.__mro__:
1385
for name, value in inspect.getmembers(
1386
cls, self._is_dbus_thing("property")):
1387
if (value._dbus_name == property_name
1388
and value._dbus_interface == interface_name):
1389
return value.__get__(self)
1390
636
for name in (property_name,
637
property_name + "_dbus_property"):
638
prop = getattr(self, name, None)
639
if (prop is None
640
or not self._is_dbus_property(prop)
641
or prop._dbus_name != property_name
642
or (interface_name and prop._dbus_interface
643
and interface_name != prop._dbus_interface)):
644
continue
645
return prop
1391
646
# No such property
1392
raise DBusPropertyNotFound("{}:{}.{}".format(
1393
self.dbus_object_path, interface_name, property_name))
1394
1395
@classmethod
1396
def _get_all_interface_names(cls):
1397
"""Get a sequence of all interfaces supported by an object"""
1398
return (name for name in set(getattr(getattr(x, attr),
1399
"_dbus_interface", None)
1400
for x in (inspect.getmro(cls))
1401
for attr in dir(x))
1402
if name is not None)
1403
1404
@dbus.service.method(dbus.PROPERTIES_IFACE,
1405
in_signature="ss",
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
648
+ interface_name + "."
649
+ property_name)
650
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1406
652
out_signature="v")
1407
653
def Get(self, interface_name, property_name):
1408
654
"""Standard D-Bus property Get() method, see D-Bus standard.
1414
660
if not hasattr(value, "variant_level"):
1415
661
return value
1416
662
return type(value)(value, variant_level=value.variant_level+1)
1417
663
1418
664
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1419
665
def Set(self, interface_name, property_name, value):
1420
666
"""Standard D-Bus property Set() method, see D-Bus standard.
1426
672
# The byte_arrays option is not supported yet on
1427
673
# signatures other than "ay".
1428
674
if prop._dbus_signature != "ay":
1429
raise ValueError("Byte arrays not supported for non-"
1430
"'ay' signature {!r}"
1431
.format(prop._dbus_signature))
1432
value = dbus.ByteArray(bytes(value))
675
raise ValueError
676
value = dbus.ByteArray(''.join(unichr(byte)
677
for byte in value))
1433
678
prop(value)
1434
1435
@dbus.service.method(dbus.PROPERTIES_IFACE,
1436
in_signature="s",
679
680
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1437
681
out_signature="a{sv}")
1438
682
def GetAll(self, interface_name):
1439
683
"""Standard D-Bus property GetAll() method, see D-Bus
1441
685
1442
686
Note: Will not include properties with access="write".
1443
687
"""
1444
properties = {}
1445
for name, prop in self._get_all_dbus_things("property"):
688
all = {}
689
for name, prop in self._get_all_dbus_properties():
1446
690
if (interface_name
1447
691
and interface_name != prop._dbus_interface):
1448
692
# Interface non-empty but did not match
1452
696
continue
1453
697
value = prop()
1454
698
if not hasattr(value, "variant_level"):
1455
properties[name] = value
699
all[name] = value
1456
700
continue
1457
properties[name] = type(value)(
1458
value, variant_level=value.variant_level + 1)
1459
return dbus.Dictionary(properties, signature="sv")
1460
1461
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1462
def PropertiesChanged(self, interface_name, changed_properties,
1463
invalidated_properties):
1464
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1465
standard.
1466
"""
1467
pass
1468
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
704
1469
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1470
706
out_signature="s",
1471
707
path_keyword='object_path',
1472
708
connection_keyword='connection')
1473
709
def Introspect(self, object_path, connection):
1474
"""Overloading of standard D-Bus method.
1475
1476
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
1477
711
"""
1478
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1479
object_path,
1480
connection)
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
713
connection)
1481
714
try:
1482
715
document = xml.dom.minidom.parseString(xmlstring)
1483
1484
716
def make_tag(document, name, prop):
1485
717
e = document.createElement("property")
1486
718
e.setAttribute("name", name)
1487
719
e.setAttribute("type", prop._dbus_signature)
1488
720
e.setAttribute("access", prop._dbus_access)
1489
721
return e
1490
1491
722
for if_tag in document.getElementsByTagName("interface"):
1492
# Add property tags
1493
723
for tag in (make_tag(document, name, prop)
1494
724
for name, prop
1495
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
1496
726
if prop._dbus_interface
1497
727
== if_tag.getAttribute("name")):
1498
728
if_tag.appendChild(tag)
1499
# Add annotation tags for properties
1500
for tag in if_tag.getElementsByTagName("property"):
1501
annots = dict()
1502
for name, prop in self._get_all_dbus_things(
1503
"property"):
1504
if (name == tag.getAttribute("name")
1505
and prop._dbus_interface
1506
== if_tag.getAttribute("name")):
1507
annots.update(getattr(
1508
prop, "_dbus_annotations", {}))
1509
for name, value in annots.items():
1510
ann_tag = document.createElement(
1511
"annotation")
1512
ann_tag.setAttribute("name", name)
1513
ann_tag.setAttribute("value", value)
1514
tag.appendChild(ann_tag)
1515
729
# Add the names to the return values for the
1516
730
# "org.freedesktop.DBus.Properties" methods
1517
731
if (if_tag.getAttribute("name")
1532
746
except (AttributeError, xml.dom.DOMException,
1533
747
xml.parsers.expat.ExpatError) as error:
1534
748
logger.error("Failed to override Introspection method",
1535
exc_info=error)
1536
return xmlstring
1537
1538
1539
try:
1540
dbus.OBJECT_MANAGER_IFACE
1541
except AttributeError:
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1543
1544
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1546
"""A D-Bus object with an ObjectManager.
1547
1548
Classes inheriting from this exposes the standard
1549
GetManagedObjects call and the InterfacesAdded and
1550
InterfacesRemoved signals on the standard
1551
"org.freedesktop.DBus.ObjectManager" interface.
1552
1553
Note: No signals are sent automatically; they must be sent
1554
manually.
1555
"""
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1557
out_signature="a{oa{sa{sv}}}")
1558
def GetManagedObjects(self):
1559
"""This function must be overridden"""
1560
raise NotImplementedError()
1561
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1563
signature="oa{sa{sv}}")
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1565
pass
1566
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1568
def InterfacesRemoved(self, object_path, interfaces):
1569
pass
1570
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1572
out_signature="s",
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1575
def Introspect(self, object_path, connection):
1576
"""Overloading of standard D-Bus method.
1577
1578
Override return argument name of GetManagedObjects to be
1579
"objpath_interfaces_and_properties"
1580
"""
1581
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1582
object_path,
1583
connection)
1584
try:
1585
document = xml.dom.minidom.parseString(xmlstring)
1586
1587
for if_tag in document.getElementsByTagName("interface"):
1588
# Fix argument name for the GetManagedObjects method
1589
if (if_tag.getAttribute("name")
1590
== dbus.OBJECT_MANAGER_IFACE):
1591
for cn in if_tag.getElementsByTagName("method"):
1592
if (cn.getAttribute("name")
1593
== "GetManagedObjects"):
1594
for arg in cn.getElementsByTagName("arg"):
1595
if (arg.getAttribute("direction")
1596
== "out"):
1597
arg.setAttribute(
1598
"name",
1599
"objpath_interfaces"
1600
"_and_properties")
1601
xmlstring = document.toxml("utf-8")
1602
document.unlink()
1603
except (AttributeError, xml.dom.DOMException,
1604
xml.parsers.expat.ExpatError) as error:
1605
logger.error("Failed to override Introspection method",
1606
exc_info=error)
1607
return xmlstring
1608
1609
1610
def datetime_to_dbus(dt, variant_level=0):
749
error)
750
return xmlstring
751
752
753
def datetime_to_dbus (dt, variant_level=0):
1611
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1612
755
if dt is None:
1613
return dbus.String("", variant_level=variant_level)
1614
return dbus.String(dt.isoformat(), variant_level=variant_level)
1615
1616
1617
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1618
"""A class decorator; applied to a subclass of
1619
dbus.service.Object, it will add alternate D-Bus attributes with
1620
interface names according to the "alt_interface_names" mapping.
1621
Usage:
1622
1623
@alternate_dbus_interfaces({"org.example.Interface":
1624
"net.example.AlternateInterface"})
1625
class SampleDBusObject(dbus.service.Object):
1626
@dbus.service.method("org.example.Interface")
1627
def SampleDBusMethod():
1628
pass
1629
1630
The above "SampleDBusMethod" on "SampleDBusObject" will be
1631
reachable via two interfaces: "org.example.Interface" and
1632
"net.example.AlternateInterface", the latter of which will have
1633
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1634
"true", unless "deprecate" is passed with a False value.
1635
1636
This works for methods and signals, and also for D-Bus properties
1637
(from DBusObjectWithProperties) and interfaces (from the
1638
dbus_interface_annotations decorator).
1639
"""
1640
1641
def wrapper(cls):
1642
for orig_interface_name, alt_interface_name in (
1643
alt_interface_names.items()):
1644
attr = {}
1645
interface_names = set()
1646
# Go though all attributes of the class
1647
for attrname, attribute in inspect.getmembers(cls):
1648
# Ignore non-D-Bus attributes, and D-Bus attributes
1649
# with the wrong interface name
1650
if (not hasattr(attribute, "_dbus_interface")
1651
or not attribute._dbus_interface.startswith(
1652
orig_interface_name)):
1653
continue
1654
# Create an alternate D-Bus interface name based on
1655
# the current name
1656
alt_interface = attribute._dbus_interface.replace(
1657
orig_interface_name, alt_interface_name)
1658
interface_names.add(alt_interface)
1659
# Is this a D-Bus signal?
1660
if getattr(attribute, "_dbus_is_signal", False):
1661
# Extract the original non-method undecorated
1662
# function by black magic
1663
if sys.version_info.major == 2:
1664
nonmethod_func = (dict(
1665
zip(attribute.func_code.co_freevars,
1666
attribute.__closure__))
1667
["func"].cell_contents)
1668
else:
1669
nonmethod_func = (dict(
1670
zip(attribute.__code__.co_freevars,
1671
attribute.__closure__))
1672
["func"].cell_contents)
1673
# Create a new, but exactly alike, function
1674
# object, and decorate it to be a new D-Bus signal
1675
# with the alternate D-Bus interface name
1676
new_function = copy_function(nonmethod_func)
1677
new_function = (dbus.service.signal(
1678
alt_interface,
1679
attribute._dbus_signature)(new_function))
1680
# Copy annotations, if any
1681
try:
1682
new_function._dbus_annotations = dict(
1683
attribute._dbus_annotations)
1684
except AttributeError:
1685
pass
1686
1687
# Define a creator of a function to call both the
1688
# original and alternate functions, so both the
1689
# original and alternate signals gets sent when
1690
# the function is called
1691
def fixscope(func1, func2):
1692
"""This function is a scope container to pass
1693
func1 and func2 to the "call_both" function
1694
outside of its arguments"""
1695
1696
@functools.wraps(func2)
1697
def call_both(*args, **kwargs):
1698
"""This function will emit two D-Bus
1699
signals by calling func1 and func2"""
1700
func1(*args, **kwargs)
1701
func2(*args, **kwargs)
1702
# Make wrapper function look like a D-Bus
1703
# signal
1704
for name, attr in inspect.getmembers(func2):
1705
if name.startswith("_dbus_"):
1706
setattr(call_both, name, attr)
1707
1708
return call_both
1709
# Create the "call_both" function and add it to
1710
# the class
1711
attr[attrname] = fixscope(attribute, new_function)
1712
# Is this a D-Bus method?
1713
elif getattr(attribute, "_dbus_is_method", False):
1714
# Create a new, but exactly alike, function
1715
# object. Decorate it to be a new D-Bus method
1716
# with the alternate D-Bus interface name. Add it
1717
# to the class.
1718
attr[attrname] = (
1719
dbus.service.method(
1720
alt_interface,
1721
attribute._dbus_in_signature,
1722
attribute._dbus_out_signature)
1723
(copy_function(attribute)))
1724
# Copy annotations, if any
1725
try:
1726
attr[attrname]._dbus_annotations = dict(
1727
attribute._dbus_annotations)
1728
except AttributeError:
1729
pass
1730
# Is this a D-Bus property?
1731
elif getattr(attribute, "_dbus_is_property", False):
1732
# Create a new, but exactly alike, function
1733
# object, and decorate it to be a new D-Bus
1734
# property with the alternate D-Bus interface
1735
# name. Add it to the class.
1736
attr[attrname] = (dbus_service_property(
1737
alt_interface, attribute._dbus_signature,
1738
attribute._dbus_access,
1739
attribute._dbus_get_args_options
1740
["byte_arrays"])
1741
(copy_function(attribute)))
1742
# Copy annotations, if any
1743
try:
1744
attr[attrname]._dbus_annotations = dict(
1745
attribute._dbus_annotations)
1746
except AttributeError:
1747
pass
1748
# Is this a D-Bus interface?
1749
elif getattr(attribute, "_dbus_is_interface", False):
1750
# Create a new, but exactly alike, function
1751
# object. Decorate it to be a new D-Bus interface
1752
# with the alternate D-Bus interface name. Add it
1753
# to the class.
1754
attr[attrname] = (
1755
dbus_interface_annotations(alt_interface)
1756
(copy_function(attribute)))
1757
if deprecate:
1758
# Deprecate all alternate interfaces
1759
iname = "_AlternateDBusNames_interface_annotation{}"
1760
for interface_name in interface_names:
1761
1762
@dbus_interface_annotations(interface_name)
1763
def func(self):
1764
return {"org.freedesktop.DBus.Deprecated":
1765
"true"}
1766
# Find an unused name
1767
for aname in (iname.format(i)
1768
for i in itertools.count()):
1769
if aname not in attr:
1770
attr[aname] = func
1771
break
1772
if interface_names:
1773
# Replace the class with a new subclass of it with
1774
# methods, signals, etc. as created above.
1775
if sys.version_info.major == 2:
1776
cls = type(b"{}Alternate".format(cls.__name__),
1777
(cls, ), attr)
1778
else:
1779
cls = type("{}Alternate".format(cls.__name__),
1780
(cls, ), attr)
1781
return cls
1782
1783
return wrapper
1784
1785
1786
@alternate_dbus_interfaces({"se.recompile.Mandos":
1787
"se.bsnet.fukt.Mandos"})
756
return dbus.String("", variant_level = variant_level)
757
return dbus.String(dt.isoformat(),
758
variant_level=variant_level)
759
1788
760
class ClientDBus(Client, DBusObjectWithProperties):
1789
761
"""A Client class using D-Bus
1790
762
1791
763
Attributes:
1792
764
dbus_object_path: dbus.ObjectPath
1793
765
bus: dbus.SystemBus()
1794
766
"""
1795
767
1796
768
runtime_expansions = (Client.runtime_expansions
1797
+ ("dbus_object_path", ))
1798
1799
_interface = "se.recompile.Mandos.Client"
1800
769
+ ("dbus_object_path",))
770
1801
771
# dbus.service.Object doesn't use super(), so we can't either.
1802
1803
def __init__(self, bus=None, *args, **kwargs):
772
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1804
775
self.bus = bus
1805
776
Client.__init__(self, *args, **kwargs)
1806
777
# Only now, when this client is initialized, can it show up on
1807
778
# the D-Bus
1808
client_object_name = str(self.name).translate(
779
client_object_name = unicode(self.name).translate(
1809
780
{ord("."): ord("_"),
1810
781
ord("-"): ord("_")})
1811
self.dbus_object_path = dbus.ObjectPath(
1812
"/clients/" + client_object_name)
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1813
784
DBusObjectWithProperties.__init__(self, self.bus,
1814
785
self.dbus_object_path)
1815
1816
def notifychangeproperty(transform_func, dbus_name,
1817
type_func=lambda x: x,
1818
variant_level=1,
1819
invalidate_only=False,
1820
_interface=_interface):
1821
""" Modify a variable so that it's a property which announces
1822
its changes to DBus.
1823
1824
transform_fun: Function that takes a value and a variant_level
1825
and transforms it to a D-Bus type.
1826
dbus_name: D-Bus name of the variable
786
787
def notifychangeproperty(transform_func,
788
dbus_name, type_func=lambda x: x,
789
variant_level=1):
790
""" Modify a variable so that its a property that announce its
791
changes to DBus.
792
transform_fun: Function that takes a value and transform it to
793
DBus type.
794
dbus_name: DBus name of the variable
1827
795
type_func: Function that transform the value before sending it
1828
to the D-Bus. Default: no transform
1829
variant_level: D-Bus variant level. Default: 1
796
to DBus
797
variant_level: DBus variant level. default: 1
1830
798
"""
1831
attrname = "_{}".format(dbus_name)
1832
799
real_value = [None,]
1833
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1834
803
if hasattr(self, "dbus_object_path"):
1835
if (not hasattr(self, attrname) or
1836
type_func(getattr(self, attrname, None))
1837
!= type_func(value)):
1838
if invalidate_only:
1839
self.PropertiesChanged(
1840
_interface, dbus.Dictionary(),
1841
dbus.Array((dbus_name, )))
1842
else:
1843
dbus_value = transform_func(
1844
type_func(value),
1845
variant_level=variant_level)
1846
self.PropertyChanged(dbus.String(dbus_name),
1847
dbus_value)
1848
self.PropertiesChanged(
1849
_interface,
1850
dbus.Dictionary({dbus.String(dbus_name):
1851
dbus_value}),
1852
dbus.Array())
1853
setattr(self, attrname, value)
1854
1855
return property(lambda self: getattr(self, attrname), setter)
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
806
variant_level)
807
self.PropertyChanged(dbus.String(dbus_name),
808
dbus_value)
809
810
return property(lambda self: real_value[0], setter)
811
1856
812
1857
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1858
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1859
815
"ApprovalPending",
1860
type_func=bool)
816
type_func = bool)
1861
817
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1862
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1863
819
"LastEnabled")
1864
checker = notifychangeproperty(
1865
dbus.Boolean, "CheckerRunning",
1866
type_func=lambda checker: checker is not None)
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1867
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1868
823
"LastCheckedOK")
1869
last_checker_status = notifychangeproperty(dbus.Int16,
1870
"LastCheckerStatus")
1871
last_approval_request = notifychangeproperty(
1872
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1873
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1874
827
"ApprovedByDefault")
1875
approval_delay = notifychangeproperty(
1876
dbus.UInt64, "ApprovalDelay",
1877
type_func=lambda td: td.total_seconds() * 1000)
1878
approval_duration = notifychangeproperty(
1879
dbus.UInt64, "ApprovalDuration",
1880
type_func=lambda td: td.total_seconds() * 1000)
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
1881
832
host = notifychangeproperty(dbus.String, "Host")
1882
timeout = notifychangeproperty(
1883
dbus.UInt64, "Timeout",
1884
type_func=lambda td: td.total_seconds() * 1000)
1885
extended_timeout = notifychangeproperty(
1886
dbus.UInt64, "ExtendedTimeout",
1887
type_func=lambda td: td.total_seconds() * 1000)
1888
interval = notifychangeproperty(
1889
dbus.UInt64, "Interval",
1890
type_func=lambda td: td.total_seconds() * 1000)
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
1891
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1892
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1893
invalidate_only=True)
1894
840
1895
841
del notifychangeproperty
1896
842
1897
843
def __del__(self, *args, **kwargs):
1898
844
try:
1899
845
self.remove_from_connection()
1902
848
if hasattr(DBusObjectWithProperties, "__del__"):
1903
849
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1904
850
Client.__del__(self, *args, **kwargs)
1905
1906
def checker_callback(self, source, condition,
1907
connection, command, *args, **kwargs):
1908
ret = Client.checker_callback(self, source, condition,
1909
connection, command, *args,
1910
**kwargs)
1911
exitstatus = self.last_checker_status
1912
if exitstatus >= 0:
851
852
def checker_callback(self, pid, condition, command,
853
*args, **kwargs):
854
self.checker_callback_tag = None
855
self.checker = None
856
if os.WIFEXITED(condition):
857
exitstatus = os.WEXITSTATUS(condition)
1913
858
# Emit D-Bus signal
1914
859
self.CheckerCompleted(dbus.Int16(exitstatus),
1915
# This is specific to GNU libC
1916
dbus.Int64(exitstatus << 8),
860
dbus.Int64(condition),
1917
861
dbus.String(command))
1918
862
else:
1919
863
# Emit D-Bus signal
1920
864
self.CheckerCompleted(dbus.Int16(-1),
1921
dbus.Int64(
1922
# This is specific to GNU libC
1923
(exitstatus << 8)
1924
| self.last_checker_signal),
865
dbus.Int64(condition),
1925
866
dbus.String(command))
1926
return ret
867
868
return Client.checker_callback(self, pid, condition, command,
869
*args, **kwargs)
1927
870
1928
871
def start_checker(self, *args, **kwargs):
1929
old_checker_pid = getattr(self.checker, "pid", None)
872
old_checker = self.checker
873
if self.checker is not None:
874
old_checker_pid = self.checker.pid
875
else:
876
old_checker_pid = None
1930
877
r = Client.start_checker(self, *args, **kwargs)
1931
878
# Only if new checker process was started
1932
879
if (self.checker is not None
1934
881
# Emit D-Bus signal
1935
882
self.CheckerStarted(self.current_checker_command)
1936
883
return r
1937
884
1938
885
def _reset_approved(self):
1939
self.approved = None
886
self._approved = None
1940
887
return False
1941
888
1942
889
def approve(self, value=True):
1943
self.approved = value
1944
GLib.timeout_add(int(self.approval_duration.total_seconds()
1945
* 1000), self._reset_approved)
1946
890
self.send_changedstate()
1947
1948
# D-Bus methods, signals & properties
1949
1950
# Interfaces
1951
1952
# Signals
1953
891
self._approved = value
892
gobject.timeout_add(_timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
896
897
## D-Bus methods, signals & properties
898
_interface = "se.bsnet.fukt.Mandos.Client"
899
900
## Signals
901
1954
902
# CheckerCompleted - signal
1955
903
@dbus.service.signal(_interface, signature="nxs")
1956
904
def CheckerCompleted(self, exitcode, waitstatus, command):
1957
905
"D-Bus signal"
1958
906
pass
1959
907
1960
908
# CheckerStarted - signal
1961
909
@dbus.service.signal(_interface, signature="s")
1962
910
def CheckerStarted(self, command):
1963
911
"D-Bus signal"
1964
912
pass
1965
913
1966
914
# PropertyChanged - signal
1967
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1968
915
@dbus.service.signal(_interface, signature="sv")
1969
916
def PropertyChanged(self, property, value):
1970
917
"D-Bus signal"
1971
918
pass
1972
919
1973
920
# GotSecret - signal
1974
921
@dbus.service.signal(_interface)
1975
922
def GotSecret(self):
1978
925
server to mandos-client
1979
926
"""
1980
927
pass
1981
928
1982
929
# Rejected - signal
1983
930
@dbus.service.signal(_interface, signature="s")
1984
931
def Rejected(self, reason):
1985
932
"D-Bus signal"
1986
933
pass
1987
934
1988
935
# NeedApproval - signal
1989
936
@dbus.service.signal(_interface, signature="tb")
1990
937
def NeedApproval(self, timeout, default):
1991
938
"D-Bus signal"
1992
939
return self.need_approval()
1993
1994
# Methods
1995
940
941
## Methods
942
1996
943
# Approve - method
1997
944
@dbus.service.method(_interface, in_signature="b")
1998
945
def Approve(self, value):
1999
946
self.approve(value)
2000
947
2001
948
# CheckedOK - method
2002
949
@dbus.service.method(_interface)
2003
950
def CheckedOK(self):
2004
951
self.checked_ok()
2005
952
2006
953
# Enable - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
954
@dbus.service.method(_interface)
2009
955
def Enable(self):
2010
956
"D-Bus method"
2011
957
self.enable()
2012
958
2013
959
# StartChecker - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2015
960
@dbus.service.method(_interface)
2016
961
def StartChecker(self):
2017
962
"D-Bus method"
2018
963
self.start_checker()
2019
964
2020
965
# Disable - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2022
966
@dbus.service.method(_interface)
2023
967
def Disable(self):
2024
968
"D-Bus method"
2025
969
self.disable()
2026
970
2027
971
# StopChecker - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2029
972
@dbus.service.method(_interface)
2030
973
def StopChecker(self):
2031
974
self.stop_checker()
2032
2033
# Properties
2034
975
976
## Properties
977
2035
978
# ApprovalPending - property
2036
979
@dbus_service_property(_interface, signature="b", access="read")
2037
980
def ApprovalPending_dbus_property(self):
2038
981
return dbus.Boolean(bool(self.approvals_pending))
2039
982
2040
983
# ApprovedByDefault - property
2041
@dbus_service_property(_interface,
2042
signature="b",
984
@dbus_service_property(_interface, signature="b",
2043
985
access="readwrite")
2044
986
def ApprovedByDefault_dbus_property(self, value=None):
2045
987
if value is None: # get
2046
988
return dbus.Boolean(self.approved_by_default)
2047
989
self.approved_by_default = bool(value)
2048
990
2049
991
# ApprovalDelay - property
2050
@dbus_service_property(_interface,
2051
signature="t",
992
@dbus_service_property(_interface, signature="t",
2052
993
access="readwrite")
2053
994
def ApprovalDelay_dbus_property(self, value=None):
2054
995
if value is None: # get
2055
return dbus.UInt64(self.approval_delay.total_seconds()
2056
* 1000)
996
return dbus.UInt64(self.approval_delay_milliseconds())
2057
997
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2058
998
2059
999
# ApprovalDuration - property
2060
@dbus_service_property(_interface,
2061
signature="t",
1000
@dbus_service_property(_interface, signature="t",
2062
1001
access="readwrite")
2063
1002
def ApprovalDuration_dbus_property(self, value=None):
2064
1003
if value is None: # get
2065
return dbus.UInt64(self.approval_duration.total_seconds()
2066
* 1000)
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
2067
1006
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2068
1007
2069
1008
# Name - property
2070
@dbus_annotations(
2071
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2072
1009
@dbus_service_property(_interface, signature="s", access="read")
2073
1010
def Name_dbus_property(self):
2074
1011
return dbus.String(self.name)
2075
2076
# KeyID - property
2077
@dbus_annotations(
2078
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2079
@dbus_service_property(_interface, signature="s", access="read")
2080
def KeyID_dbus_property(self):
2081
return dbus.String(self.key_id)
2082
1012
2083
1013
# Fingerprint - property
2084
@dbus_annotations(
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
1014
@dbus_service_property(_interface, signature="s", access="read")
2087
1015
def Fingerprint_dbus_property(self):
2088
1016
return dbus.String(self.fingerprint)
2089
1017
2090
1018
# Host - property
2091
@dbus_service_property(_interface,
2092
signature="s",
1019
@dbus_service_property(_interface, signature="s",
2093
1020
access="readwrite")
2094
1021
def Host_dbus_property(self, value=None):
2095
1022
if value is None: # get
2096
1023
return dbus.String(self.host)
2097
self.host = str(value)
2098
1024
self.host = value
1025
2099
1026
# Created - property
2100
@dbus_annotations(
2101
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2102
1027
@dbus_service_property(_interface, signature="s", access="read")
2103
1028
def Created_dbus_property(self):
2104
return datetime_to_dbus(self.created)
2105
1029
return dbus.String(datetime_to_dbus(self.created))
1030
2106
1031
# LastEnabled - property
2107
1032
@dbus_service_property(_interface, signature="s", access="read")
2108
1033
def LastEnabled_dbus_property(self):
2109
1034
return datetime_to_dbus(self.last_enabled)
2110
1035
2111
1036
# Enabled - property
2112
@dbus_service_property(_interface,
2113
signature="b",
1037
@dbus_service_property(_interface, signature="b",
2114
1038
access="readwrite")
2115
1039
def Enabled_dbus_property(self, value=None):
2116
1040
if value is None: # get
2119
1043
self.enable()
2120
1044
else:
2121
1045
self.disable()
2122
1046
2123
1047
# LastCheckedOK - property
2124
@dbus_service_property(_interface,
2125
signature="s",
1048
@dbus_service_property(_interface, signature="s",
2126
1049
access="readwrite")
2127
1050
def LastCheckedOK_dbus_property(self, value=None):
2128
1051
if value is not None:
2129
1052
self.checked_ok()
2130
1053
return
2131
1054
return datetime_to_dbus(self.last_checked_ok)
2132
2133
# LastCheckerStatus - property
2134
@dbus_service_property(_interface, signature="n", access="read")
2135
def LastCheckerStatus_dbus_property(self):
2136
return dbus.Int16(self.last_checker_status)
2137
1055
2138
1056
# Expires - property
2139
1057
@dbus_service_property(_interface, signature="s", access="read")
2140
1058
def Expires_dbus_property(self):
2141
1059
return datetime_to_dbus(self.expires)
2142
1060
2143
1061
# LastApprovalRequest - property
2144
1062
@dbus_service_property(_interface, signature="s", access="read")
2145
1063
def LastApprovalRequest_dbus_property(self):
2146
1064
return datetime_to_dbus(self.last_approval_request)
2147
1065
2148
1066
# Timeout - property
2149
@dbus_service_property(_interface,
2150
signature="t",
1067
@dbus_service_property(_interface, signature="t",
2151
1068
access="readwrite")
2152
1069
def Timeout_dbus_property(self, value=None):
2153
1070
if value is None: # get
2154
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2155
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
2156
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
2157
# Reschedule disabling
2158
if self.enabled:
2159
now = datetime.datetime.utcnow()
2160
self.expires += self.timeout - old_timeout
2161
if self.expires <= now:
2162
# The timeout has passed
2163
self.disable()
2164
else:
2165
if (getattr(self, "disable_initiator_tag", None)
2166
is None):
2167
return
2168
GLib.source_remove(self.disable_initiator_tag)
2169
self.disable_initiator_tag = GLib.timeout_add(
2170
int((self.expires - now).total_seconds() * 1000),
2171
self.disable)
1073
if getattr(self, "disable_initiator_tag", None) is None:
1074
return
1075
# Reschedule timeout
1076
gobject.source_remove(self.disable_initiator_tag)
1077
self.disable_initiator_tag = None
1078
self.expires = None
1079
time_to_die = (self.
1080
_timedelta_to_milliseconds((self
1081
.last_checked_ok
1082
+ self.timeout)
1083
- datetime.datetime
1084
.utcnow()))
1085
if time_to_die <= 0:
1086
# The timeout has passed
1087
self.disable()
1088
else:
1089
self.expires = (datetime.datetime.utcnow()
1090
+ datetime.timedelta(milliseconds = time_to_die))
1091
self.disable_initiator_tag = (gobject.timeout_add
1092
(time_to_die, self.disable))
2172
1093
2173
1094
# ExtendedTimeout - property
2174
@dbus_service_property(_interface,
2175
signature="t",
1095
@dbus_service_property(_interface, signature="t",
2176
1096
access="readwrite")
2177
1097
def ExtendedTimeout_dbus_property(self, value=None):
2178
1098
if value is None: # get
2179
return dbus.UInt64(self.extended_timeout.total_seconds()
2180
* 1000)
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
2181
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2182
1101
2183
1102
# Interval - property
2184
@dbus_service_property(_interface,
2185
signature="t",
1103
@dbus_service_property(_interface, signature="t",
2186
1104
access="readwrite")
2187
1105
def Interval_dbus_property(self, value=None):
2188
1106
if value is None: # get
2189
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
2190
1108
self.interval = datetime.timedelta(0, 0, 0, value)
2191
1109
if getattr(self, "checker_initiator_tag", None) is None:
2192
1110
return
2193
if self.enabled:
2194
# Reschedule checker run
2195
GLib.source_remove(self.checker_initiator_tag)
2196
self.checker_initiator_tag = GLib.timeout_add(
2197
value, self.start_checker)
2198
self.start_checker() # Start one now, too
1111
# Reschedule checker run
1112
gobject.source_remove(self.checker_initiator_tag)
1113
self.checker_initiator_tag = (gobject.timeout_add
1114
(value, self.start_checker))
1115
self.start_checker() # Start one now, too
2199
1116
2200
1117
# Checker - property
2201
@dbus_service_property(_interface,
2202
signature="s",
1118
@dbus_service_property(_interface, signature="s",
2203
1119
access="readwrite")
2204
1120
def Checker_dbus_property(self, value=None):
2205
1121
if value is None: # get
2206
1122
return dbus.String(self.checker_command)
2207
self.checker_command = str(value)
2208
1123
self.checker_command = value
1124
2209
1125
# CheckerRunning - property
2210
@dbus_service_property(_interface,
2211
signature="b",
1126
@dbus_service_property(_interface, signature="b",
2212
1127
access="readwrite")
2213
1128
def CheckerRunning_dbus_property(self, value=None):
2214
1129
if value is None: # get
2217
1132
self.start_checker()
2218
1133
else:
2219
1134
self.stop_checker()
2220
1135
2221
1136
# ObjectPath - property
2222
@dbus_annotations(
2223
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2224
"org.freedesktop.DBus.Deprecated": "true"})
2225
1137
@dbus_service_property(_interface, signature="o", access="read")
2226
1138
def ObjectPath_dbus_property(self):
2227
return self.dbus_object_path # is already a dbus.ObjectPath
2228
1139
return self.dbus_object_path # is already a dbus.ObjectPath
1140
2229
1141
# Secret = property
2230
@dbus_annotations(
2231
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2232
"invalidates"})
2233
@dbus_service_property(_interface,
2234
signature="ay",
2235
access="write",
2236
byte_arrays=True)
1142
@dbus_service_property(_interface, signature="ay",
1143
access="write", byte_arrays=True)
2237
1144
def Secret_dbus_property(self, value):
2238
self.secret = bytes(value)
2239
1145
self.secret = str(value)
1146
2240
1147
del _interface
2241
1148
2242
1149
2243
class ProxyClient:
2244
def __init__(self, child_pipe, key_id, fpr, address):
1150
class ProxyClient(object):
1151
def __init__(self, child_pipe, fpr, address):
2245
1152
self._pipe = child_pipe
2246
self._pipe.send(('init', key_id, fpr, address))
1153
self._pipe.send(('init', fpr, address))
2247
1154
if not self._pipe.recv():
2248
raise KeyError(key_id or fpr)
1155
raise KeyError()
2249
1156
2250
1157
def __getattribute__(self, name):
2251
if name == '_pipe':
1158
if(name == '_pipe'):
2252
1159
return super(ProxyClient, self).__getattribute__(name)
2253
1160
self._pipe.send(('getattr', name))
2254
1161
data = self._pipe.recv()
2255
1162
if data[0] == 'data':
2256
1163
return data[1]
2257
1164
if data[0] == 'function':
2258
2259
1165
def func(*args, **kwargs):
2260
1166
self._pipe.send(('funcall', name, args, kwargs))
2261
1167
return self._pipe.recv()[1]
2262
2263
1168
return func
2264
1169
2265
1170
def __setattr__(self, name, value):
2266
if name == '_pipe':
1171
if(name == '_pipe'):
2267
1172
return super(ProxyClient, self).__setattr__(name, value)
2268
1173
self._pipe.send(('setattr', name, value))
2269
1174
2270
1175
2271
1176
class ClientHandler(socketserver.BaseRequestHandler, object):
2272
1177
"""A class to handle client connections.
2273
1178
2274
1179
Instantiated once for each connection to handle it.
2275
1180
Note: This will run in its own forked process."""
2276
1181
2277
1182
def handle(self):
2278
1183
with contextlib.closing(self.server.child_pipe) as child_pipe:
2279
1184
logger.info("TCP connection from: %s",
2280
str(self.client_address))
1185
unicode(self.client_address))
2281
1186
logger.debug("Pipe FD: %d",
2282
1187
self.server.child_pipe.fileno())
2283
1188
2284
session = gnutls.ClientSession(self.request)
2285
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+COMP-NULL", "+CTYPE-OPENPGP",
2289
# "+DHE-DSS"))
1189
session = (gnutls.connection
1190
.ClientSession(self.request,
1191
gnutls.connection
1192
.X509Credentials()))
1193
1194
# Note: gnutls.connection.X509Credentials is really a
1195
# generic GnuTLS certificate credentials object so long as
1196
# no X.509 keys are added to it. Therefore, we can use it
1197
# here despite using OpenPGP certificates.
1198
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1200
# "+AES-256-CBC", "+SHA1",
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1202
# "+DHE-DSS"))
2290
1203
# Use a fallback default, since this MUST be set.
2291
1204
priority = self.server.gnutls_priority
2292
1205
if priority is None:
2293
1206
priority = "NORMAL"
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
2296
None)
1207
(gnutls.library.functions
1208
.gnutls_priority_set_direct(session._c_object,
1209
priority, None))
2297
1210
2298
1211
# Start communication using the Mandos protocol
2299
1212
# Get protocol number
2301
1214
logger.debug("Protocol version: %r", line)
2302
1215
try:
2303
1216
if int(line.strip().split()[0]) > 1:
2304
raise RuntimeError(line)
1217
raise RuntimeError
2305
1218
except (ValueError, IndexError, RuntimeError) as error:
2306
1219
logger.error("Unknown protocol version: %s", error)
2307
1220
return
2309
1222
# Start GnuTLS connection
2310
1223
try:
2311
1224
session.handshake()
2312
except gnutls.Error as error:
1225
except gnutls.errors.GNUTLSError as error:
2313
1226
logger.warning("Handshake failed: %s", error)
2314
1227
# Do not run session.bye() here: the session is not
2315
1228
# established. Just abandon the request.
2318
1231
2319
1232
approval_required = False
2320
1233
try:
2321
if gnutls.has_rawpk:
2322
fpr = b""
2323
try:
2324
key_id = self.key_id(
2325
self.peer_certificate(session))
2326
except (TypeError, gnutls.Error) as error:
2327
logger.warning("Bad certificate: %s", error)
2328
return
2329
logger.debug("Key ID: %s", key_id)
2330
2331
else:
2332
key_id = b""
2333
try:
2334
fpr = self.fingerprint(
2335
self.peer_certificate(session))
2336
except (TypeError, gnutls.Error) as error:
2337
logger.warning("Bad certificate: %s", error)
2338
return
2339
logger.debug("Fingerprint: %s", fpr)
2340
2341
try:
2342
client = ProxyClient(child_pipe, key_id, fpr,
1234
try:
1235
fpr = self.fingerprint(self.peer_certificate
1236
(session))
1237
except (TypeError,
1238
gnutls.errors.GNUTLSError) as error:
1239
logger.warning("Bad certificate: %s", error)
1240
return
1241
logger.debug("Fingerprint: %s", fpr)
1242
1243
try:
1244
client = ProxyClient(child_pipe, fpr,
2343
1245
self.client_address)
2344
1246
except KeyError:
2345
1247
return
2346
1248
2347
1249
if client.approval_delay:
2348
1250
delay = client.approval_delay
2349
1251
client.approvals_pending += 1
2350
1252
approval_required = True
2351
1253
2352
1254
while True:
2353
1255
if not client.enabled:
2354
1256
logger.info("Client %s is disabled",
2355
client.name)
1257
client.name)
2356
1258
if self.server.use_dbus:
2357
1259
# Emit D-Bus signal
2358
client.Rejected("Disabled")
1260
client.Rejected("Disabled")
2359
1261
return
2360
2361
if client.approved or not client.approval_delay:
2362
# We are approved or approval is disabled
1262
1263
if client._approved or not client.approval_delay:
1264
#We are approved or approval is disabled
2363
1265
break
2364
elif client.approved is None:
1266
elif client._approved is None:
2365
1267
logger.info("Client %s needs approval",
2366
1268
client.name)
2367
1269
if self.server.use_dbus:
2368
1270
# Emit D-Bus signal
2369
1271
client.NeedApproval(
2370
client.approval_delay.total_seconds()
2371
* 1000, client.approved_by_default)
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
2372
1274
else:
2373
1275
logger.warning("Client %s was not approved",
2374
1276
client.name)
2376
1278
# Emit D-Bus signal
2377
1279
client.Rejected("Denied")
2378
1280
return
2379
2380
# wait until timeout or approved
1281
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
2381
1284
time = datetime.datetime.now()
2382
1285
client.changedstate.acquire()
2383
client.changedstate.wait(delay.total_seconds())
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2384
1287
client.changedstate.release()
2385
1288
time2 = datetime.datetime.now()
2386
1289
if (time2 - time) >= delay:
2396
1299
break
2397
1300
else:
2398
1301
delay -= time2 - time
2399
2400
try:
2401
session.send(client.secret)
2402
except gnutls.Error as error:
2403
logger.warning("gnutls send failed",
2404
exc_info=error)
2405
return
1302
1303
sent_size = 0
1304
while sent_size < len(client.secret):
1305
try:
1306
sent = session.send(client.secret[sent_size:])
1307
except gnutls.errors.GNUTLSError as error:
1308
logger.warning("gnutls send failed")
1309
return
1310
logger.debug("Sent: %d, remaining: %d",
1311
sent, len(client.secret)
1312
- (sent_size + sent))
1313
sent_size += sent
2406
1314
2407
1315
logger.info("Sending secret to %s", client.name)
2408
# bump the timeout using extended_timeout
2409
client.bump_timeout(client.extended_timeout)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
2410
1318
if self.server.use_dbus:
2411
1319
# Emit D-Bus signal
2412
1320
client.GotSecret()
2413
1321
2414
1322
finally:
2415
1323
if approval_required:
2416
1324
client.approvals_pending -= 1
2417
1325
try:
2418
1326
session.bye()
2419
except gnutls.Error as error:
2420
logger.warning("GnuTLS bye failed",
2421
exc_info=error)
2422
1327
except gnutls.errors.GNUTLSError as error:
1328
logger.warning("GnuTLS bye failed")
1329
2423
1330
@staticmethod
2424
1331
def peer_certificate(session):
2425
"Return the peer's certificate as a bytestring"
2426
try:
2427
cert_type = gnutls.certificate_type_get2(session._c_object,
2428
gnutls.CTYPE_PEERS)
2429
except AttributeError:
2430
cert_type = gnutls.certificate_type_get(session._c_object)
2431
if gnutls.has_rawpk:
2432
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2433
else:
2434
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2435
# If not a valid certificate type...
2436
if cert_type not in valid_cert_types:
2437
logger.info("Cert type %r not in %r", cert_type,
2438
valid_cert_types)
2439
# ...return invalid data
2440
return b""
1332
"Return the peer's OpenPGP certificate as a bytestring"
1333
# If not an OpenPGP certificate...
1334
if (gnutls.library.functions
1335
.gnutls_certificate_type_get(session._c_object)
1336
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1337
# ...do the normal thing
1338
return session.peer_certificate
2441
1339
list_size = ctypes.c_uint(1)
2442
cert_list = (gnutls.certificate_get_peers
1340
cert_list = (gnutls.library.functions
1341
.gnutls_certificate_get_peers
2443
1342
(session._c_object, ctypes.byref(list_size)))
2444
1343
if not bool(cert_list) and list_size.value != 0:
2445
raise gnutls.Error("error getting peer certificate")
1344
raise gnutls.errors.GNUTLSError("error getting peer"
1345
" certificate")
2446
1346
if list_size.value == 0:
2447
1347
return None
2448
1348
cert = cert_list[0]
2449
1349
return ctypes.string_at(cert.data, cert.size)
2450
2451
@staticmethod
2452
def key_id(certificate):
2453
"Convert a certificate bytestring to a hexdigit key ID"
2454
# New GnuTLS "datum" with the public key
2455
datum = gnutls.datum_t(
2456
ctypes.cast(ctypes.c_char_p(certificate),
2457
ctypes.POINTER(ctypes.c_ubyte)),
2458
ctypes.c_uint(len(certificate)))
2459
# XXX all these need to be created in the gnutls "module"
2460
# New empty GnuTLS certificate
2461
pubkey = gnutls.pubkey_t()
2462
gnutls.pubkey_init(ctypes.byref(pubkey))
2463
# Import the raw public key into the certificate
2464
gnutls.pubkey_import(pubkey,
2465
ctypes.byref(datum),
2466
gnutls.X509_FMT_DER)
2467
# New buffer for the key ID
2468
buf = ctypes.create_string_buffer(32)
2469
buf_len = ctypes.c_size_t(len(buf))
2470
# Get the key ID from the raw public key into the buffer
2471
gnutls.pubkey_get_key_id(pubkey,
2472
gnutls.KEYID_USE_SHA256,
2473
ctypes.cast(ctypes.byref(buf),
2474
ctypes.POINTER(ctypes.c_ubyte)),
2475
ctypes.byref(buf_len))
2476
# Deinit the certificate
2477
gnutls.pubkey_deinit(pubkey)
2478
2479
# Convert the buffer to a Python bytestring
2480
key_id = ctypes.string_at(buf, buf_len.value)
2481
# Convert the bytestring to hexadecimal notation
2482
hex_key_id = binascii.hexlify(key_id).upper()
2483
return hex_key_id
2484
1350
2485
1351
@staticmethod
2486
1352
def fingerprint(openpgp):
2487
1353
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2488
1354
# New GnuTLS "datum" with the OpenPGP public key
2489
datum = gnutls.datum_t(
2490
ctypes.cast(ctypes.c_char_p(openpgp),
2491
ctypes.POINTER(ctypes.c_ubyte)),
2492
ctypes.c_uint(len(openpgp)))
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1357
ctypes.POINTER
1358
(ctypes.c_ubyte)),
1359
ctypes.c_uint(len(openpgp))))
2493
1360
# New empty GnuTLS certificate
2494
crt = gnutls.openpgp_crt_t()
2495
gnutls.openpgp_crt_init(ctypes.byref(crt))
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2496
1364
# Import the OpenPGP public key into the certificate
2497
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2498
gnutls.OPENPGP_FMT_RAW)
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
2499
1369
# Verify the self signature in the key
2500
1370
crtverify = ctypes.c_uint()
2501
gnutls.openpgp_crt_verify_self(crt, 0,
2502
ctypes.byref(crtverify))
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
2503
1374
if crtverify.value != 0:
2504
gnutls.openpgp_crt_deinit(crt)
2505
raise gnutls.CertificateSecurityError(code
2506
=crtverify.value)
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1376
raise (gnutls.errors.CertificateSecurityError
1377
("Verify failed"))
2507
1378
# New buffer for the fingerprint
2508
1379
buf = ctypes.create_string_buffer(20)
2509
1380
buf_len = ctypes.c_size_t()
2510
1381
# Get the fingerprint from the certificate into the buffer
2511
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2512
ctypes.byref(buf_len))
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
2513
1385
# Deinit the certificate
2514
gnutls.openpgp_crt_deinit(crt)
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2515
1387
# Convert the buffer to a Python bytestring
2516
1388
fpr = ctypes.string_at(buf, buf_len.value)
2517
1389
# Convert the bytestring to hexadecimal notation
2518
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2519
1391
return hex_fpr
2520
1392
2521
1393
2522
class MultiprocessingMixIn:
1394
class MultiprocessingMixIn(object):
2523
1395
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2524
2525
1396
def sub_process_main(self, request, address):
2526
1397
try:
2527
1398
self.finish_request(request, address)
2528
except Exception:
1399
except:
2529
1400
self.handle_error(request, address)
2530
1401
self.close_request(request)
2531
1402
2532
1403
def process_request(self, request, address):
2533
1404
"""Start a new process to process the request."""
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
2536
proc.start()
2537
return proc
2538
2539
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
1407
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2541
1409
""" adds a pipe to the MixIn """
2542
2543
1410
def process_request(self, request, client_address):
2544
1411
"""Overrides and wraps the original process_request().
2545
1412
2546
1413
This function creates a new pipe in self.pipe
2547
1414
"""
2548
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2549
1416
2550
proc = MultiprocessingMixIn.process_request(self, request,
2551
client_address)
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
2552
1419
self.child_pipe.close()
2553
self.add_pipe(parent_pipe, proc)
1420
self.add_pipe(parent_pipe)
2554
1421
2555
def add_pipe(self, parent_pipe, proc):
1422
def add_pipe(self, parent_pipe):
2556
1423
"""Dummy function; override as necessary"""
2557
raise NotImplementedError()
2558
1424
raise NotImplementedError
2559
1425
2560
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2561
socketserver.TCPServer):
1427
socketserver.TCPServer, object):
2562
1428
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2563
1429
2564
1430
Attributes:
2565
1431
enabled: Boolean; whether this server is activated yet
2566
1432
interface: None or a network interface name (string)
2567
1433
use_ipv6: Boolean; to use IPv6 or not
2568
1434
"""
2569
2570
1435
def __init__(self, server_address, RequestHandlerClass,
2571
interface=None,
2572
use_ipv6=True,
2573
socketfd=None):
2574
"""If socketfd is set, use that file descriptor instead of
2575
creating a new one with socket.socket().
2576
"""
1436
interface=None, use_ipv6=True):
2577
1437
self.interface = interface
2578
1438
if use_ipv6:
2579
1439
self.address_family = socket.AF_INET6
2580
if socketfd is not None:
2581
# Save the file descriptor
2582
self.socketfd = socketfd
2583
# Save the original socket.socket() function
2584
self.socket_socket = socket.socket
2585
2586
# To implement --socket, we monkey patch socket.socket.
2587
#
2588
# (When socketserver.TCPServer is a new-style class, we
2589
# could make self.socket into a property instead of monkey
2590
# patching socket.socket.)
2591
#
2592
# Create a one-time-only replacement for socket.socket()
2593
@functools.wraps(socket.socket)
2594
def socket_wrapper(*args, **kwargs):
2595
# Restore original function so subsequent calls are
2596
# not affected.
2597
socket.socket = self.socket_socket
2598
del self.socket_socket
2599
# This time only, return a new socket object from the
2600
# saved file descriptor.
2601
return socket.fromfd(self.socketfd, *args, **kwargs)
2602
# Replace socket.socket() function with wrapper
2603
socket.socket = socket_wrapper
2604
# The socketserver.TCPServer.__init__ will call
2605
# socket.socket(), which might be our replacement,
2606
# socket_wrapper(), if socketfd was set.
2607
1440
socketserver.TCPServer.__init__(self, server_address,
2608
1441
RequestHandlerClass)
2609
2610
1442
def server_bind(self):
2611
1443
"""This overrides the normal server_bind() function
2612
1444
to bind to an interface if one was specified, and also NOT to
2613
1445
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2615
1446
if self.interface is not None:
2616
1447
if SO_BINDTODEVICE is None:
2617
# Fall back to a hard-coded value which seems to be
2618
# common enough.
2619
logger.warning("SO_BINDTODEVICE not found, trying 25")
2620
SO_BINDTODEVICE = 25
2621
try:
2622
self.socket.setsockopt(
2623
socket.SOL_SOCKET, SO_BINDTODEVICE,
2624
(self.interface + "\0").encode("utf-8"))
2625
except socket.error as error:
2626
if error.errno == errno.EPERM:
2627
logger.error("No permission to bind to"
2628
" interface %s", self.interface)
2629
elif error.errno == errno.ENOPROTOOPT:
2630
logger.error("SO_BINDTODEVICE not available;"
2631
" cannot bind to interface %s",
2632
self.interface)
2633
elif error.errno == errno.ENODEV:
2634
logger.error("Interface %s does not exist,"
2635
" cannot bind", self.interface)
2636
else:
2637
raise
1448
logger.error("SO_BINDTODEVICE does not exist;"
1449
" cannot bind to interface %s",
1450
self.interface)
1451
else:
1452
try:
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1454
SO_BINDTODEVICE,
1455
str(self.interface
1456
+ '\0'))
1457
except socket.error as error:
1458
if error[0] == errno.EPERM:
1459
logger.error("No permission to"
1460
" bind to interface %s",
1461
self.interface)
1462
elif error[0] == errno.ENOPROTOOPT:
1463
logger.error("SO_BINDTODEVICE not available;"
1464
" cannot bind to interface %s",
1465
self.interface)
1466
else:
1467
raise
2638
1468
# Only bind(2) the socket if we really need to.
2639
1469
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2642
1470
if not self.server_address[0]:
2643
1471
if self.address_family == socket.AF_INET6:
2644
any_address = "::" # in6addr_any
1472
any_address = "::" # in6addr_any
2645
1473
else:
2646
any_address = "0.0.0.0" # INADDR_ANY
1474
any_address = socket.INADDR_ANY
2647
1475
self.server_address = (any_address,
2648
1476
self.server_address[1])
2649
1477
elif not self.server_address[1]:
2650
self.server_address = (self.server_address[0], 0)
1478
self.server_address = (self.server_address[0],
1479
0)
2651
1480
# if self.interface:
2652
1481
# self.server_address = (self.server_address[0],
2653
1482
# 0, # port
2659
1488
2660
1489
class MandosServer(IPv6_TCPServer):
2661
1490
"""Mandos server.
2662
1491
2663
1492
Attributes:
2664
1493
clients: set of Client objects
2665
1494
gnutls_priority GnuTLS priority string
2666
1495
use_dbus: Boolean; to emit D-Bus signals or not
2667
2668
Assumes a GLib.MainLoop event loop.
1496
1497
Assumes a gobject.MainLoop event loop.
2669
1498
"""
2670
2671
1499
def __init__(self, server_address, RequestHandlerClass,
2672
interface=None,
2673
use_ipv6=True,
2674
clients=None,
2675
gnutls_priority=None,
2676
use_dbus=True,
2677
socketfd=None):
1500
interface=None, use_ipv6=True, clients=None,
1501
gnutls_priority=None, use_dbus=True):
2678
1502
self.enabled = False
2679
1503
self.clients = clients
2680
1504
if self.clients is None:
2681
self.clients = {}
1505
self.clients = set()
2682
1506
self.use_dbus = use_dbus
2683
1507
self.gnutls_priority = gnutls_priority
2684
1508
IPv6_TCPServer.__init__(self, server_address,
2685
1509
RequestHandlerClass,
2686
interface=interface,
2687
use_ipv6=use_ipv6,
2688
socketfd=socketfd)
2689
1510
interface = interface,
1511
use_ipv6 = use_ipv6)
2690
1512
def server_activate(self):
2691
1513
if self.enabled:
2692
1514
return socketserver.TCPServer.server_activate(self)
2693
2694
1515
def enable(self):
2695
1516
self.enabled = True
2696
2697
def add_pipe(self, parent_pipe, proc):
1517
def add_pipe(self, parent_pipe):
2698
1518
# Call "handle_ipc" for both data and EOF events
2699
GLib.io_add_watch(
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2702
functools.partial(self.handle_ipc,
2703
parent_pipe=parent_pipe,
2704
proc=proc))
2705
2706
def handle_ipc(self, source, condition,
2707
parent_pipe=None,
2708
proc=None,
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe))
1523
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2709
1525
client_object=None):
2710
# error, or the other end of multiprocessing.Pipe has closed
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2712
# Wait for other process to exit
2713
proc.join()
1526
condition_names = {
1527
gobject.IO_IN: "IN", # There is data to read.
1528
gobject.IO_OUT: "OUT", # Data can be written (without
1529
# blocking).
1530
gobject.IO_PRI: "PRI", # There is urgent data to read.
1531
gobject.IO_ERR: "ERR", # Error condition.
1532
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1533
# broken, usually for pipes and
1534
# sockets).
1535
}
1536
conditions_string = ' | '.join(name
1537
for cond, name in
1538
condition_names.iteritems()
1539
if cond & condition)
1540
# error or the other end of multiprocessing.Pipe has closed
1541
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2714
1542
return False
2715
1543
2716
1544
# Read a request from the child
2717
1545
request = parent_pipe.recv()
2718
1546
command = request[0]
2719
1547
2720
1548
if command == 'init':
2721
key_id = request[1].decode("ascii")
2722
fpr = request[2].decode("ascii")
2723
address = request[3]
2724
2725
for c in self.clients.values():
2726
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2727
continue
2728
if key_id and c.key_id == key_id:
2729
client = c
2730
break
2731
if fpr and c.fingerprint == fpr:
1549
fpr = request[1]
1550
address = request[2]
1551
1552
for c in self.clients:
1553
if c.fingerprint == fpr:
2732
1554
client = c
2733
1555
break
2734
1556
else:
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
1557
logger.info("Client not found for fingerprint: %s, ad"
1558
"dress: %s", fpr, address)
2737
1559
if self.use_dbus:
2738
1560
# Emit D-Bus signal
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2740
address[0])
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2741
1562
parent_pipe.send(False)
2742
1563
return False
2743
2744
GLib.io_add_watch(
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2747
functools.partial(self.handle_ipc,
2748
parent_pipe=parent_pipe,
2749
proc=proc,
2750
client_object=client))
1564
1565
gobject.io_add_watch(parent_pipe.fileno(),
1566
gobject.IO_IN | gobject.IO_HUP,
1567
functools.partial(self.handle_ipc,
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2751
1570
parent_pipe.send(True)
2752
# remove the old hook in favor of the new above hook on
2753
# same fileno
1571
# remove the old hook in favor of the new above hook on same fileno
2754
1572
return False
2755
1573
if command == 'funcall':
2756
1574
funcname = request[1]
2757
1575
args = request[2]
2758
1576
kwargs = request[3]
2759
2760
parent_pipe.send(('data', getattr(client_object,
2761
funcname)(*args,
2762
**kwargs)))
1577
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2763
1579
2764
1580
if command == 'getattr':
2765
1581
attrname = request[1]
2766
if isinstance(client_object.__getattribute__(attrname),
2767
collections.abc.Callable):
2768
parent_pipe.send(('function', ))
1582
if callable(client_object.__getattribute__(attrname)):
1583
parent_pipe.send(('function',))
2769
1584
else:
2770
parent_pipe.send((
2771
'data', client_object.__getattribute__(attrname)))
2772
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1586
2773
1587
if command == 'setattr':
2774
1588
attrname = request[1]
2775
1589
value = request[2]
2778
1592
return True
2779
1593
2780
1594
2781
def rfc3339_duration_to_delta(duration):
2782
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2783
2784
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2785
True
2786
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2787
True
2788
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2789
True
2790
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2791
True
2792
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2793
True
2794
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2795
True
2796
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2797
True
2798
"""
2799
2800
# Parsing an RFC 3339 duration with regular expressions is not
2801
# possible - there would have to be multiple places for the same
2802
# values, like seconds. The current code, while more esoteric, is
2803
# cleaner without depending on a parsing library. If Python had a
2804
# built-in library for parsing we would use it, but we'd like to
2805
# avoid excessive use of external libraries.
2806
2807
# New type for defining tokens, syntax, and semantics all-in-one
2808
Token = collections.namedtuple("Token", (
2809
"regexp", # To match token; if "value" is not None, must have
2810
# a "group" containing digits
2811
"value", # datetime.timedelta or None
2812
"followers")) # Tokens valid after this token
2813
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2814
# the "duration" ABNF definition in RFC 3339, Appendix A.
2815
token_end = Token(re.compile(r"$"), None, frozenset())
2816
token_second = Token(re.compile(r"(\d+)S"),
2817
datetime.timedelta(seconds=1),
2818
frozenset((token_end, )))
2819
token_minute = Token(re.compile(r"(\d+)M"),
2820
datetime.timedelta(minutes=1),
2821
frozenset((token_second, token_end)))
2822
token_hour = Token(re.compile(r"(\d+)H"),
2823
datetime.timedelta(hours=1),
2824
frozenset((token_minute, token_end)))
2825
token_time = Token(re.compile(r"T"),
2826
None,
2827
frozenset((token_hour, token_minute,
2828
token_second)))
2829
token_day = Token(re.compile(r"(\d+)D"),
2830
datetime.timedelta(days=1),
2831
frozenset((token_time, token_end)))
2832
token_month = Token(re.compile(r"(\d+)M"),
2833
datetime.timedelta(weeks=4),
2834
frozenset((token_day, token_end)))
2835
token_year = Token(re.compile(r"(\d+)Y"),
2836
datetime.timedelta(weeks=52),
2837
frozenset((token_month, token_end)))
2838
token_week = Token(re.compile(r"(\d+)W"),
2839
datetime.timedelta(weeks=1),
2840
frozenset((token_end, )))
2841
token_duration = Token(re.compile(r"P"), None,
2842
frozenset((token_year, token_month,
2843
token_day, token_time,
2844
token_week)))
2845
# Define starting values:
2846
# Value so far
2847
value = datetime.timedelta()
2848
found_token = None
2849
# Following valid tokens
2850
followers = frozenset((token_duration, ))
2851
# String left to parse
2852
s = duration
2853
# Loop until end token is found
2854
while found_token is not token_end:
2855
# Search for any currently valid tokens
2856
for token in followers:
2857
match = token.regexp.match(s)
2858
if match is not None:
2859
# Token found
2860
if token.value is not None:
2861
# Value found, parse digits
2862
factor = int(match.group(1), 10)
2863
# Add to value so far
2864
value += factor * token.value
2865
# Strip token from string
2866
s = token.regexp.sub("", s, 1)
2867
# Go to found token
2868
found_token = token
2869
# Set valid next tokens
2870
followers = found_token.followers
2871
break
2872
else:
2873
# No currently valid tokens were found
2874
raise ValueError("Invalid RFC 3339 duration: {!r}"
2875
.format(duration))
2876
# End token found
2877
return value
2878
2879
2880
1595
def string_to_delta(interval):
2881
1596
"""Parse a string and return a datetime.timedelta
2882
2883
>>> string_to_delta('7d') == datetime.timedelta(7)
2884
True
2885
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2886
True
2887
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2888
True
2889
>>> string_to_delta('24h') == datetime.timedelta(1)
2890
True
2891
>>> string_to_delta('1w') == datetime.timedelta(7)
2892
True
2893
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2894
True
1597
1598
>>> string_to_delta('7d')
1599
datetime.timedelta(7)
1600
>>> string_to_delta('60s')
1601
datetime.timedelta(0, 60)
1602
>>> string_to_delta('60m')
1603
datetime.timedelta(0, 3600)
1604
>>> string_to_delta('24h')
1605
datetime.timedelta(1)
1606
>>> string_to_delta('1w')
1607
datetime.timedelta(7)
1608
>>> string_to_delta('5m 30s')
1609
datetime.timedelta(0, 330)
2895
1610
"""
2896
2897
try:
2898
return rfc3339_duration_to_delta(interval)
2899
except ValueError:
2900
pass
2901
2902
1611
timevalue = datetime.timedelta(0)
2903
1612
for s in interval.split():
2904
1613
try:
2905
suffix = s[-1]
1614
suffix = unicode(s[-1])
2906
1615
value = int(s[:-1])
2907
1616
if suffix == "d":
2908
1617
delta = datetime.timedelta(value)
2915
1624
elif suffix == "w":
2916
1625
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2917
1626
else:
2918
raise ValueError("Unknown suffix {!r}".format(suffix))
2919
except IndexError as e:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2920
1629
raise ValueError(*(e.args))
2921
1630
timevalue += delta
2922
1631
return timevalue
2923
1632
2924
1633
2925
def daemon(nochdir=False, noclose=False):
1634
def if_nametoindex(interface):
1635
"""Call the C function if_nametoindex(), or equivalent
1636
1637
Note: This function cannot accept a unicode string."""
1638
global if_nametoindex
1639
try:
1640
if_nametoindex = (ctypes.cdll.LoadLibrary
1641
(ctypes.util.find_library("c"))
1642
.if_nametoindex)
1643
except (OSError, AttributeError):
1644
logger.warning("Doing if_nametoindex the hard way")
1645
def if_nametoindex(interface):
1646
"Get an interface index the hard way, i.e. using fcntl()"
1647
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1648
with contextlib.closing(socket.socket()) as s:
1649
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1650
struct.pack(str("16s16x"),
1651
interface))
1652
interface_index = struct.unpack(str("I"),
1653
ifreq[16:20])[0]
1654
return interface_index
1655
return if_nametoindex(interface)
1656
1657
1658
def daemon(nochdir = False, noclose = False):
2926
1659
"""See daemon(3). Standard BSD Unix function.
2927
1660
2928
1661
This should really exist as os.daemon, but it doesn't (yet)."""
2929
1662
if os.fork():
2930
1663
sys.exit()
2935
1668
sys.exit()
2936
1669
if not noclose:
2937
1670
# Close all standard open file descriptors
2938
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2939
1672
if not stat.S_ISCHR(os.fstat(null).st_mode):
2940
1673
raise OSError(errno.ENODEV,
2941
"{} not a character device"
2942
.format(os.devnull))
1674
"%s not a character device"
1675
% os.path.devnull)
2943
1676
os.dup2(null, sys.stdin.fileno())
2944
1677
os.dup2(null, sys.stdout.fileno())
2945
1678
os.dup2(null, sys.stderr.fileno())
2948
1681
2949
1682
2950
1683
def main():
2951
1684
2952
1685
##################################################################
2953
1686
# Parsing of options, both command line and config file
2954
1687
2955
1688
parser = argparse.ArgumentParser()
2956
1689
parser.add_argument("-v", "--version", action="version",
2957
version="%(prog)s {}".format(version),
1690
version = "%%(prog)s %s" % version,
2958
1691
help="show version number and exit")
2959
1692
parser.add_argument("-i", "--interface", metavar="IF",
2960
1693
help="Bind to interface IF")
2966
1699
help="Run self-test")
2967
1700
parser.add_argument("--debug", action="store_true",
2968
1701
help="Debug mode; run in foreground and log"
2969
" to terminal", default=None)
1702
" to terminal")
2970
1703
parser.add_argument("--debuglevel", metavar="LEVEL",
2971
1704
help="Debug level for stdout output")
2972
1705
parser.add_argument("--priority", help="GnuTLS"
2979
1712
" files")
2980
1713
parser.add_argument("--no-dbus", action="store_false",
2981
1714
dest="use_dbus", help="Do not provide D-Bus"
2982
" system bus interface", default=None)
1715
" system bus interface")
2983
1716
parser.add_argument("--no-ipv6", action="store_false",
2984
dest="use_ipv6", help="Do not use IPv6",
2985
default=None)
2986
parser.add_argument("--no-restore", action="store_false",
2987
dest="restore", help="Do not restore stored"
2988
" state", default=None)
2989
parser.add_argument("--socket", type=int,
2990
help="Specify a file descriptor to a network"
2991
" socket to use instead of creating one")
2992
parser.add_argument("--statedir", metavar="DIR",
2993
help="Directory to save/restore state in")
2994
parser.add_argument("--foreground", action="store_true",
2995
help="Run in foreground", default=None)
2996
parser.add_argument("--no-zeroconf", action="store_false",
2997
dest="zeroconf", help="Do not use Zeroconf",
2998
default=None)
2999
1717
dest="use_ipv6", help="Do not use IPv6")
3000
1718
options = parser.parse_args()
3001
1719
1720
if options.check:
1721
import doctest
1722
doctest.testmod()
1723
sys.exit()
1724
3002
1725
# Default values for config file for server-global settings
3003
if gnutls.has_rawpk:
3004
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3005
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3006
else:
3007
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3008
":+SIGN-DSA-SHA256")
3009
server_defaults = {"interface": "",
3010
"address": "",
3011
"port": "",
3012
"debug": "False",
3013
"priority": priority,
3014
"servicename": "Mandos",
3015
"use_dbus": "True",
3016
"use_ipv6": "True",
3017
"debuglevel": "",
3018
"restore": "True",
3019
"socket": "",
3020
"statedir": "/var/lib/mandos",
3021
"foreground": "False",
3022
"zeroconf": "True",
3023
}
3024
del priority
3025
1726
server_defaults = { "interface": "",
1727
"address": "",
1728
"port": "",
1729
"debug": "False",
1730
"priority":
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1732
"servicename": "Mandos",
1733
"use_dbus": "True",
1734
"use_ipv6": "True",
1735
"debuglevel": "",
1736
}
1737
3026
1738
# Parse config file for server-global settings
3027
server_config = configparser.ConfigParser(server_defaults)
1739
server_config = configparser.SafeConfigParser(server_defaults)
3028
1740
del server_defaults
3029
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3030
# Convert the ConfigParser object to a dict
1741
server_config.read(os.path.join(options.configdir,
1742
"mandos.conf"))
1743
# Convert the SafeConfigParser object to a dict
3031
1744
server_settings = server_config.defaults()
3032
1745
# Use the appropriate methods on the non-string config options
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
3035
1747
server_settings[option] = server_config.getboolean("DEFAULT",
3036
1748
option)
3037
1749
if server_settings["port"]:
3038
1750
server_settings["port"] = server_config.getint("DEFAULT",
3039
1751
"port")
3040
if server_settings["socket"]:
3041
server_settings["socket"] = server_config.getint("DEFAULT",
3042
"socket")
3043
# Later, stdin will, and stdout and stderr might, be dup'ed
3044
# over with an opened os.devnull. But we don't want this to
3045
# happen with a supplied network socket.
3046
if 0 <= server_settings["socket"] <= 2:
3047
server_settings["socket"] = os.dup(server_settings
3048
["socket"])
3049
1752
del server_config
3050
1753
3051
1754
# Override the settings from the config file with command line
3052
1755
# options, if set.
3053
1756
for option in ("interface", "address", "port", "debug",
3054
"priority", "servicename", "configdir", "use_dbus",
3055
"use_ipv6", "debuglevel", "restore", "statedir",
3056
"socket", "foreground", "zeroconf"):
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
3057
1759
value = getattr(options, option)
3058
1760
if value is not None:
3059
1761
server_settings[option] = value
3060
1762
del options
3061
1763
# Force all strings to be unicode
3062
1764
for option in server_settings.keys():
3063
if isinstance(server_settings[option], bytes):
3064
server_settings[option] = (server_settings[option]
3065
.decode("utf-8"))
3066
# Force all boolean options to be boolean
3067
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3068
"foreground", "zeroconf"):
3069
server_settings[option] = bool(server_settings[option])
3070
# Debug implies foreground
3071
if server_settings["debug"]:
3072
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
3073
1767
# Now we have our good server settings in "server_settings"
3074
1768
3075
1769
##################################################################
3076
3077
if (not server_settings["zeroconf"]
3078
and not (server_settings["port"]
3079
or server_settings["socket"] != "")):
3080
parser.error("Needs port or socket to work without Zeroconf")
3081
1770
3082
1771
# For convenience
3083
1772
debug = server_settings["debug"]
3084
1773
debuglevel = server_settings["debuglevel"]
3085
1774
use_dbus = server_settings["use_dbus"]
3086
1775
use_ipv6 = server_settings["use_ipv6"]
3087
stored_state_path = os.path.join(server_settings["statedir"],
3088
stored_state_file)
3089
foreground = server_settings["foreground"]
3090
zeroconf = server_settings["zeroconf"]
3091
3092
if debug:
3093
initlogger(debug, logging.DEBUG)
3094
else:
3095
if not debuglevel:
3096
initlogger(debug)
3097
else:
3098
level = getattr(logging, debuglevel.upper())
3099
initlogger(debug, level)
3100
1776
3101
1777
if server_settings["servicename"] != "Mandos":
3102
syslogger.setFormatter(
3103
logging.Formatter('Mandos ({}) [%(process)d]:'
3104
' %(levelname)s: %(message)s'.format(
3105
server_settings["servicename"])))
3106
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
1782
3107
1783
# Parse config file with clients
3108
client_config = configparser.ConfigParser(Client.client_defaults)
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1786
"interval": "2m",
1787
"checker": "fping -q -- %%(host)s",
1788
"host": "",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1791
}
1792
client_config = configparser.SafeConfigParser(client_defaults)
3109
1793
client_config.read(os.path.join(server_settings["configdir"],
3110
1794
"clients.conf"))
3111
1795
3112
1796
global mandos_dbus_service
3113
1797
mandos_dbus_service = None
3114
3115
socketfd = None
3116
if server_settings["socket"] != "":
3117
socketfd = server_settings["socket"]
3118
tcp_server = MandosServer(
3119
(server_settings["address"], server_settings["port"]),
3120
ClientHandler,
3121
interface=(server_settings["interface"] or None),
3122
use_ipv6=use_ipv6,
3123
gnutls_priority=server_settings["priority"],
3124
use_dbus=use_dbus,
3125
socketfd=socketfd)
3126
if not foreground:
3127
pidfilename = "/run/mandos.pid"
3128
if not os.path.isdir("/run/."):
3129
pidfilename = "/var/run/mandos.pid"
3130
pidfile = None
3131
try:
3132
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3133
except IOError as e:
3134
logger.error("Could not open file %r", pidfilename,
3135
exc_info=e)
3136
3137
for name, group in (("_mandos", "_mandos"),
3138
("mandos", "mandos"),
3139
("nobody", "nogroup")):
3140
try:
3141
uid = pwd.getpwnam(name).pw_uid
3142
gid = pwd.getpwnam(group).pw_gid
3143
break
1798
1799
tcp_server = MandosServer((server_settings["address"],
1800
server_settings["port"]),
1801
ClientHandler,
1802
interface=(server_settings["interface"]
1803
or None),
1804
use_ipv6=use_ipv6,
1805
gnutls_priority=
1806
server_settings["priority"],
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
1810
try:
1811
pidfile = open(pidfilename, "w")
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
1814
1815
try:
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
1818
except KeyError:
1819
try:
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
3144
1822
except KeyError:
3145
continue
3146
else:
3147
uid = 65534
3148
gid = 65534
1823
try:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
1826
except KeyError:
1827
uid = 65534
1828
gid = 65534
3149
1829
try:
3150
1830
os.setgid(gid)
3151
1831
os.setuid(uid)
3152
if debug:
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3154
gid))
3155
1832
except OSError as error:
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
3158
if error.errno != errno.EPERM:
3159
raise
1833
if error[0] != errno.EPERM:
1834
raise error
1835
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1839
if debuglevel:
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
3160
1843
3161
1844
if debug:
3162
1845
# Enable all possible GnuTLS debugging
3163
1846
3164
1847
# "Use a log level over 10 to enable all debugging options."
3165
1848
# - GnuTLS manual
3166
gnutls.global_set_log_level(11)
3167
3168
@gnutls.log_func
1849
gnutls.library.functions.gnutls_global_set_log_level(11)
1850
1851
@gnutls.library.types.gnutls_log_func
3169
1852
def debug_gnutls(level, string):
3170
1853
logger.debug("GnuTLS: %s", string[:-1])
3171
3172
gnutls.global_set_log_function(debug_gnutls)
3173
1854
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
1857
3174
1858
# Redirect stdin so all checkers get /dev/null
3175
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3176
1860
os.dup2(null, sys.stdin.fileno())
3177
1861
if null > 2:
3178
1862
os.close(null)
3179
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
1866
3180
1867
# Need to fork before connecting to D-Bus
3181
if not foreground:
1868
if not debug:
3182
1869
# Close all input and output, do double fork, etc.
3183
1870
daemon()
3184
3185
if gi.version_info < (3, 10, 2):
3186
# multiprocessing will use threads, so before we use GLib we
3187
# need to inform GLib that threads will be used.
3188
GLib.threads_init()
3189
1871
3190
1872
global main_loop
3191
1873
# From the Avahi example code
3192
DBusGMainLoop(set_as_default=True)
3193
main_loop = GLib.MainLoop()
1874
DBusGMainLoop(set_as_default=True )
1875
main_loop = gobject.MainLoop()
3194
1876
bus = dbus.SystemBus()
3195
1877
# End of Avahi example code
3196
1878
if use_dbus:
3197
1879
try:
3198
bus_name = dbus.service.BusName("se.recompile.Mandos",
3199
bus,
3200
do_not_queue=True)
3201
old_bus_name = dbus.service.BusName(
3202
"se.bsnet.fukt.Mandos", bus,
3203
do_not_queue=True)
3204
except dbus.exceptions.DBusException as e:
3205
logger.error("Disabling D-Bus:", exc_info=e)
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1881
bus, do_not_queue=True)
1882
except dbus.exceptions.NameExistsException as e:
1883
logger.error(unicode(e) + ", disabling D-Bus")
3206
1884
use_dbus = False
3207
1885
server_settings["use_dbus"] = False
3208
1886
tcp_server.use_dbus = False
3209
if zeroconf:
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3214
protocol=protocol,
3215
bus=bus)
3216
if server_settings["interface"]:
3217
service.interface = if_nametoindex(
3218
server_settings["interface"].encode("utf-8"))
3219
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
1894
3220
1895
global multiprocessing_manager
3221
1896
multiprocessing_manager = multiprocessing.Manager()
3222
1897
3223
1898
client_class = Client
3224
1899
if use_dbus:
3225
client_class = functools.partial(ClientDBus, bus=bus)
3226
3227
client_settings = Client.config_parser(client_config)
3228
old_client_settings = {}
3229
clients_data = {}
3230
3231
# This is used to redirect stdout and stderr for checker processes
3232
global wnull
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3234
# Only used if server is running in foreground but not in debug
3235
# mode
3236
if debug or not foreground:
3237
wnull.close()
3238
3239
# Get client data and settings from last running state.
3240
if server_settings["restore"]:
3241
try:
3242
with open(stored_state_path, "rb") as stored_state:
3243
if sys.version_info.major == 2:
3244
clients_data, old_client_settings = pickle.load(
3245
stored_state)
3246
else:
3247
bytes_clients_data, bytes_old_client_settings = (
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3250
# clients_data
3251
# .keys()
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3254
else key): value
3255
for key, value in
3256
bytes_clients_data.items()}
3257
del bytes_clients_data
3258
for key in clients_data:
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3261
for k, v in
3262
clients_data[key].items()}
3263
clients_data[key] = value
3264
# .client_structure
3265
value["client_structure"] = [
3266
(s.decode("utf-8")
3267
if isinstance(s, bytes)
3268
else s) for s in
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3272
if isinstance(value[k], bytes):
3273
value[k] = value[k].decode("utf-8")
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3279
# .keys()
3280
old_client_settings = {
3281
(key.decode("utf-8")
3282
if isinstance(key, bytes)
3283
else key): value
3284
for key, value in
3285
bytes_old_client_settings.items()}
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3288
for value in old_client_settings.values():
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
3292
.decode("utf-8"))
3293
os.remove(stored_state_path)
3294
except IOError as e:
3295
if e.errno == errno.ENOENT:
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
3298
else:
3299
logger.critical("Could not load persistent state:",
3300
exc_info=e)
3301
raise
3302
except EOFError as e:
3303
logger.warning("Could not load persistent state: "
3304
"EOFError:",
3305
exc_info=e)
3306
3307
with PGPEngine() as pgp:
3308
for client_name, client in clients_data.items():
3309
# Skip removed clients
3310
if client_name not in client_settings:
3311
continue
3312
3313
# Decide which value to use after restoring saved state.
3314
# We have three different values: Old config file,
3315
# new config file, and saved state.
3316
# New config value takes precedence if it differs from old
3317
# config value, otherwise use saved state.
3318
for name, value in client_settings[client_name].items():
3319
try:
3320
# For each value in new config, check if it
3321
# differs from the old config value (Except for
3322
# the "secret" attribute)
3323
if (name != "secret"
3324
and (value !=
3325
old_client_settings[client_name][name])):
3326
client[name] = value
3327
except KeyError:
3328
pass
3329
3330
# Clients who has passed its expire date can still be
3331
# enabled if its last checker was successful. A Client
3332
# whose checker succeeded before we stored its state is
3333
# assumed to have successfully run all checkers during
3334
# downtime.
3335
if client["enabled"]:
3336
if datetime.datetime.utcnow() >= client["expires"]:
3337
if not client["last_checked_ok"]:
3338
logger.warning(
3339
"disabling client {} - Client never "
3340
"performed a successful checker".format(
3341
client_name))
3342
client["enabled"] = False
3343
elif client["last_checker_status"] != 0:
3344
logger.warning(
3345
"disabling client {} - Client last"
3346
" checker failed with error code"
3347
" {}".format(
3348
client_name,
3349
client["last_checker_status"]))
3350
client["enabled"] = False
3351
else:
3352
client["expires"] = (
3353
datetime.datetime.utcnow()
3354
+ client["timeout"])
3355
logger.debug("Last checker succeeded,"
3356
" keeping {} enabled".format(
3357
client_name))
1900
client_class = functools.partial(ClientDBus, bus = bus)
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1906
}
1907
for name, value in config.items(section):
3358
1908
try:
3359
client["secret"] = pgp.decrypt(
3360
client["encrypted_secret"],
3361
client_settings[client_name]["secret"])
3362
except PGPError:
3363
# If decryption fails, we use secret from new settings
3364
logger.debug("Failed to decrypt {} old secret".format(
3365
client_name))
3366
client["secret"] = (client_settings[client_name]
3367
["secret"])
3368
3369
# Add/remove clients based on new changes made to config
3370
for client_name in (set(old_client_settings)
3371
- set(client_settings)):
3372
del clients_data[client_name]
3373
for client_name in (set(client_settings)
3374
- set(old_client_settings)):
3375
clients_data[client_name] = client_settings[client_name]
3376
3377
# Create all client objects
3378
for client_name, client in clients_data.items():
3379
tcp_server.clients[client_name] = client_class(
3380
name=client_name,
3381
settings=client,
3382
server_settings=server_settings)
3383
1909
yield (name, special_settings[name]())
1910
except KeyError:
1911
yield (name, value)
1912
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
3384
1918
if not tcp_server.clients:
3385
1919
logger.warning("No clients defined")
3386
3387
if not foreground:
3388
if pidfile is not None:
3389
pid = os.getpid()
3390
try:
3391
with pidfile:
3392
print(pid, file=pidfile)
3393
except IOError:
3394
logger.error("Could not write to file %r with PID %d",
3395
pidfilename, pid)
3396
del pidfile
1920
1921
if not debug:
1922
try:
1923
with pidfile:
1924
pid = os.getpid()
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1926
del pidfile
1927
except IOError:
1928
logger.error("Could not write to file %r with PID %d",
1929
pidfilename, pid)
1930
except NameError:
1931
# "pidfile" was never created
1932
pass
3397
1933
del pidfilename
3398
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
lambda: main_loop.quit() and False)
3402
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1939
3403
1940
if use_dbus:
3404
3405
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3407
class MandosDBusService(DBusObjectWithObjectManager):
1941
class MandosDBusService(dbus.service.Object):
3408
1942
"""A D-Bus proxy object"""
3409
3410
1943
def __init__(self):
3411
1944
dbus.service.Object.__init__(self, bus, "/")
3412
3413
_interface = "se.recompile.Mandos"
3414
1945
_interface = "se.bsnet.fukt.Mandos"
1946
3415
1947
@dbus.service.signal(_interface, signature="o")
3416
1948
def ClientAdded(self, objpath):
3417
1949
"D-Bus signal"
3418
1950
pass
3419
1951
3420
1952
@dbus.service.signal(_interface, signature="ss")
3421
def ClientNotFound(self, key_id, address):
1953
def ClientNotFound(self, fingerprint, address):
3422
1954
"D-Bus signal"
3423
1955
pass
3424
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3426
"true"})
1956
3427
1957
@dbus.service.signal(_interface, signature="os")
3428
1958
def ClientRemoved(self, objpath, name):
3429
1959
"D-Bus signal"
3430
1960
pass
3431
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3433
"true"})
1961
3434
1962
@dbus.service.method(_interface, out_signature="ao")
3435
1963
def GetAllClients(self):
3436
1964
"D-Bus method"
3437
return dbus.Array(c.dbus_object_path for c in
3438
tcp_server.clients.values())
3439
3440
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3441
"true"})
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
1967
3442
1968
@dbus.service.method(_interface,
3443
1969
out_signature="a{oa{sv}}")
3444
1970
def GetAllClientsWithProperties(self):
3445
1971
"D-Bus method"
3446
1972
return dbus.Dictionary(
3447
{c.dbus_object_path: c.GetAll(
3448
"se.recompile.Mandos.Client")
3449
for c in tcp_server.clients.values()},
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
3450
1975
signature="oa{sv}")
3451
1976
3452
1977
@dbus.service.method(_interface, in_signature="o")
3453
1978
def RemoveClient(self, object_path):
3454
1979
"D-Bus method"
3455
for c in tcp_server.clients.values():
1980
for c in tcp_server.clients:
3456
1981
if c.dbus_object_path == object_path:
3457
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
3458
1983
c.remove_from_connection()
3459
# Don't signal the disabling
1984
# Don't signal anything except ClientRemoved
3460
1985
c.disable(quiet=True)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
1986
# Emit D-Bus signal
1987
self.ClientRemoved(object_path, c.name)
3463
1988
return
3464
1989
raise KeyError(object_path)
3465
1990
3466
1991
del _interface
3467
3468
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3469
out_signature="a{oa{sa{sv}}}")
3470
def GetManagedObjects(self):
3471
"""D-Bus method"""
3472
return dbus.Dictionary(
3473
{client.dbus_object_path:
3474
dbus.Dictionary(
3475
{interface: client.GetAll(interface)
3476
for interface in
3477
client._get_all_interface_names()})
3478
for client in tcp_server.clients.values()})
3479
3480
def client_added_signal(self, client):
3481
"""Send the new standard signal and the old signal"""
3482
if use_dbus:
3483
# New standard signal
3484
self.InterfacesAdded(
3485
client.dbus_object_path,
3486
dbus.Dictionary(
3487
{interface: client.GetAll(interface)
3488
for interface in
3489
client._get_all_interface_names()}))
3490
# Old signal
3491
self.ClientAdded(client.dbus_object_path)
3492
3493
def client_removed_signal(self, client):
3494
"""Send the new standard signal and the old signal"""
3495
if use_dbus:
3496
# New standard signal
3497
self.InterfacesRemoved(
3498
client.dbus_object_path,
3499
client._get_all_interface_names())
3500
# Old signal
3501
self.ClientRemoved(client.dbus_object_path,
3502
client.name)
3503
1992
3504
1993
mandos_dbus_service = MandosDBusService()
3505
3506
# Save modules to variables to exempt the modules from being
3507
# unloaded before the function registered with atexit() is run.
3508
mp = multiprocessing
3509
wn = wnull
3510
1994
3511
1995
def cleanup():
3512
1996
"Cleanup function; run on exit"
3513
if zeroconf:
3514
service.cleanup()
3515
3516
mp.active_children()
3517
wn.close()
3518
if not (tcp_server.clients or client_settings):
3519
return
3520
3521
# Store client before exiting. Secrets are encrypted with key
3522
# based on what config file has. If config file is
3523
# removed/edited, old secret will thus be unrecovable.
3524
clients = {}
3525
with PGPEngine() as pgp:
3526
for client in tcp_server.clients.values():
3527
key = client_settings[client.name]["secret"]
3528
client.encrypted_secret = pgp.encrypt(client.secret,
3529
key)
3530
client_dict = {}
3531
3532
# A list of attributes that can not be pickled
3533
# + secret.
3534
exclude = {"bus", "changedstate", "secret",
3535
"checker", "server_settings"}
3536
for name, typ in inspect.getmembers(dbus.service
3537
.Object):
3538
exclude.add(name)
3539
3540
client_dict["encrypted_secret"] = (client
3541
.encrypted_secret)
3542
for attr in client.client_structure:
3543
if attr not in exclude:
3544
client_dict[attr] = getattr(client, attr)
3545
3546
clients[client.name] = client_dict
3547
del client_settings[client.name]["secret"]
3548
3549
try:
3550
with tempfile.NamedTemporaryFile(
3551
mode='wb',
3552
suffix=".pickle",
3553
prefix='clients-',
3554
dir=os.path.dirname(stored_state_path),
3555
delete=False) as stored_state:
3556
pickle.dump((clients, client_settings), stored_state,
3557
protocol=2)
3558
tempname = stored_state.name
3559
os.rename(tempname, stored_state_path)
3560
except (IOError, OSError) as e:
3561
if not debug:
3562
try:
3563
os.remove(tempname)
3564
except NameError:
3565
pass
3566
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3567
logger.warning("Could not save persistent state: {}"
3568
.format(os.strerror(e.errno)))
3569
else:
3570
logger.warning("Could not save persistent state:",
3571
exc_info=e)
3572
raise
3573
3574
# Delete all clients, and settings from config
1997
service.cleanup()
1998
3575
1999
while tcp_server.clients:
3576
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
3577
2001
if use_dbus:
3578
2002
client.remove_from_connection()
3579
# Don't signal the disabling
2003
client.disable_hook = None
2004
# Don't signal anything except ClientRemoved
3580
2005
client.disable(quiet=True)
3581
# Emit D-Bus signal for removal
3582
2006
if use_dbus:
3583
mandos_dbus_service.client_removed_signal(client)
3584
client_settings.clear()
3585
2007
# Emit D-Bus signal
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2009
client.name)
2010
3586
2011
atexit.register(cleanup)
3587
3588
for client in tcp_server.clients.values():
2012
2013
for client in tcp_server.clients:
3589
2014
if use_dbus:
3590
# Emit D-Bus signal for adding
3591
mandos_dbus_service.client_added_signal(client)
3592
# Need to initiate checking of clients
3593
if client.enabled:
3594
client.init_checker()
3595
2015
# Emit D-Bus signal
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2017
client.enable()
2018
3596
2019
tcp_server.enable()
3597
2020
tcp_server.server_activate()
3598
2021
3599
2022
# Find out what port we got
3600
if zeroconf:
3601
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
3602
2024
if use_ipv6:
3603
2025
logger.info("Now listening on address %r, port %d,"
3604
" flowinfo %d, scope_id %d",
3605
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
3606
2028
else: # IPv4
3607
logger.info("Now listening on address %r, port %d",
3608
*tcp_server.socket.getsockname())
3609
3610
# service.interface = tcp_server.socket.getsockname()[3]
3611
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2031
2032
#service.interface = tcp_server.socket.getsockname()[3]
2033
3612
2034
try:
3613
if zeroconf:
3614
# From the Avahi example code
3615
try:
3616
service.activate()
3617
except dbus.exceptions.DBusException as error:
3618
logger.critical("D-Bus Exception", exc_info=error)
3619
cleanup()
3620
sys.exit(1)
3621
# End of Avahi example code
3622
3623
GLib.io_add_watch(
3624
GLib.IOChannel.unix_new(tcp_server.fileno()),
3625
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3626
lambda *args, **kwargs: (tcp_server.handle_request
3627
(*args[2:], **kwargs) or True))
3628
2035
# From the Avahi example code
2036
try:
2037
service.activate()
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2040
cleanup()
2041
sys.exit(1)
2042
# End of Avahi example code
2043
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2045
lambda *args, **kwargs:
2046
(tcp_server.handle_request
2047
(*args[2:], **kwargs) or True))
2048
3629
2049
logger.debug("Starting main loop")
3630
2050
main_loop.run()
3631
2051
except AvahiError as error:
3632
logger.critical("Avahi Error", exc_info=error)
2052
logger.critical("AvahiError: %s", error)
3633
2053
cleanup()
3634
2054
sys.exit(1)
3635
2055
except KeyboardInterrupt:
3640
2060
# Must run before the D-Bus bus name gets deregistered
3641
2061
cleanup()
3642
2062
3643
3644
def should_only_run_tests():
3645
parser = argparse.ArgumentParser(add_help=False)
3646
parser.add_argument("--check", action='store_true')
3647
args, unknown_args = parser.parse_known_args()
3648
run_tests = args.check
3649
if run_tests:
3650
# Remove --check argument from sys.argv
3651
sys.argv[1:] = unknown_args
3652
return run_tests
3653
3654
# Add all tests from doctest strings
3655
def load_tests(loader, tests, none):
3656
import doctest
3657
tests.addTests(doctest.DocTestSuite())
3658
return tests
3659
3660
2063
if __name__ == '__main__':
3661
try:
3662
if should_only_run_tests():
3663
# Call using ./mandos --check [--verbose]
3664
unittest.main()
3665
else:
3666
main()
3667
finally:
3668
logging.shutdown()
2064
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0