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- Committer: teddy at recompile
- Date: 2020-02-05 21:39:28 UTC
- mto: This revision was merged to the branch mainline in revision 396.
- Revision ID: teddy@recompile.se-20200205213928-vpvt0fwfg47ikv6f
Allow users to alter ask-password-mandos.service
If a user uses dracut with systemd and wishes to modify the options
passed to password-agent(8mandos) or mandos-client(8mandos), they
should be able to do so by simply creating a file
/etc/systemd/system/ask-password-mandos.service.d/override.conf,
containing, for instance:
[Service]
Environment=MANDOS_CLIENT_OPTIONS=--debug
Adding PASSWORD_AGENT_OPTIONS should also be possible (but should not
normally be needed).
* dracut-module/ask-password-mandos.service ([Service]/ExecStart): Add
$PASSWORD_AGENT_OPTIONS before "--" and "$MANDOS_CLIENT_OPTIONS" to
end of line.
* dracut-module/module-setup.sh (install): Install all files named
/etc/systemd/system/ask-password-mandos.service.d/*.conf if any
exists. Also add --dh-params before $MANDOS_CLIENT_OPTIONS instead
of at end of line.
If a user uses dracut with systemd and wishes to modify the options
passed to password-agent(8mandos) or mandos-client(8mandos), they
should be able to do so by simply creating a file
/etc/systemd/system/ask-password-mandos.service.d/override.conf,
containing, for instance:
[Service]
Environment=MANDOS_CLIENT_OPTIONS=--debug
Adding PASSWORD_AGENT_OPTIONS should also be possible (but should not
normally be needed).
* dracut-module/ask-password-mandos.service ([Service]/ExecStart): Add
$PASSWORD_AGENT_OPTIONS before "--" and "$MANDOS_CLIENT_OPTIONS" to
end of line.
* dracut-module/module-setup.sh (install): Install all files named
/etc/systemd/system/ask-password-mandos.service.d/*.conf if any
exists. Also add --dh-params before $MANDOS_CLIENT_OPTIONS instead
of at end of line.
- files added:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
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
#
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
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
#
13
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
15
#
16
# This program is free software: you can redistribute it and/or modify
17
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
18
21
# the Free Software Foundation, either version 3 of the License, or
19
22
# (at your option) any later version.
20
23
#
21
# This program is distributed in the hope that it will be useful,
22
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
23
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24
27
# GNU General Public License for more details.
25
#
28
#
26
29
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see
28
# <http://www.gnu.org/licenses/>.
29
#
30
# Contact the authors at <mandos@fukt.bsnet.se>.
31
#
32
33
from __future__ import division
34
35
import SocketServer
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
34
35
from __future__ import (division, absolute_import, print_function,
36
unicode_literals)
37
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
36
47
import socket
37
from optparse import OptionParser
48
import argparse
38
49
import datetime
39
50
import errno
40
import gnutls.crypto
41
import gnutls.connection
42
import gnutls.errors
43
import gnutls.library.functions
44
import gnutls.library.constants
45
import gnutls.library.types
46
import ConfigParser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
47
55
import sys
48
56
import re
49
57
import os
50
58
import signal
51
from sets import Set
52
59
import subprocess
53
60
import atexit
54
61
import stat
55
62
import logging
56
63
import logging.handlers
57
64
import pwd
65
import contextlib
66
import struct
67
import fcntl
68
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
73
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
58
82
59
83
import dbus
60
import gobject
61
import avahi
84
import dbus.service
85
import gi
86
from gi.repository import GLib
62
87
from dbus.mainloop.glib import DBusGMainLoop
63
88
import ctypes
64
89
import ctypes.util
65
66
version = "1.0.2"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
74
logger.addHandler(syslogger)
75
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
79
logger.addHandler(console)
90
import xml.dom.minidom
91
import inspect
92
93
if sys.version_info.major == 2:
94
__metaclass__ = type
95
str = unicode
96
97
# Show warnings by default
98
if not sys.warnoptions:
99
import warnings
100
warnings.simplefilter("default")
101
102
# Try to find the value of SO_BINDTODEVICE:
103
try:
104
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
105
# newer, and it is also the most natural place for it:
106
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
107
except AttributeError:
108
try:
109
# This is where SO_BINDTODEVICE was up to and including Python
110
# 2.6, and also 3.2:
111
from IN import SO_BINDTODEVICE
112
except ImportError:
113
# In Python 2.7 it seems to have been removed entirely.
114
# Try running the C preprocessor:
115
try:
116
cc = subprocess.Popen(["cc", "--language=c", "-E",
117
"/dev/stdin"],
118
stdin=subprocess.PIPE,
119
stdout=subprocess.PIPE)
120
stdout = cc.communicate(
121
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
122
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
123
except (OSError, ValueError, IndexError):
124
# No value found
125
SO_BINDTODEVICE = None
126
127
if sys.version_info < (3, 2):
128
configparser.Configparser = configparser.SafeConfigParser
129
130
version = "1.8.9"
131
stored_state_file = "clients.pickle"
132
133
logger = logging.getLogger()
134
logging.captureWarnings(True) # Show warnings via the logging system
135
syslogger = None
136
137
try:
138
if_nametoindex = ctypes.cdll.LoadLibrary(
139
ctypes.util.find_library("c")).if_nametoindex
140
except (OSError, AttributeError):
141
142
def if_nametoindex(interface):
143
"Get an interface index the hard way, i.e. using fcntl()"
144
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
145
with contextlib.closing(socket.socket()) as s:
146
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
147
struct.pack(b"16s16x", interface))
148
interface_index = struct.unpack("I", ifreq[16:20])[0]
149
return interface_index
150
151
152
def copy_function(func):
153
"""Make a copy of a function"""
154
if sys.version_info.major == 2:
155
return types.FunctionType(func.func_code,
156
func.func_globals,
157
func.func_name,
158
func.func_defaults,
159
func.func_closure)
160
else:
161
return types.FunctionType(func.__code__,
162
func.__globals__,
163
func.__name__,
164
func.__defaults__,
165
func.__closure__)
166
167
168
def initlogger(debug, level=logging.WARNING):
169
"""init logger and add loglevel"""
170
171
global syslogger
172
syslogger = (logging.handlers.SysLogHandler(
173
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
174
address="/dev/log"))
175
syslogger.setFormatter(logging.Formatter
176
('Mandos [%(process)d]: %(levelname)s:'
177
' %(message)s'))
178
logger.addHandler(syslogger)
179
180
if debug:
181
console = logging.StreamHandler()
182
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
183
' [%(process)d]:'
184
' %(levelname)s:'
185
' %(message)s'))
186
logger.addHandler(console)
187
logger.setLevel(level)
188
189
190
class PGPError(Exception):
191
"""Exception if encryption/decryption fails"""
192
pass
193
194
195
class PGPEngine:
196
"""A simple class for OpenPGP symmetric encryption & decryption"""
197
198
def __init__(self):
199
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
200
self.gpg = "gpg"
201
try:
202
output = subprocess.check_output(["gpgconf"])
203
for line in output.splitlines():
204
name, text, path = line.split(b":")
205
if name == b"gpg":
206
self.gpg = path
207
break
208
except OSError as e:
209
if e.errno != errno.ENOENT:
210
raise
211
self.gnupgargs = ['--batch',
212
'--homedir', self.tempdir,
213
'--force-mdc',
214
'--quiet']
215
# Only GPG version 1 has the --no-use-agent option.
216
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
217
self.gnupgargs.append("--no-use-agent")
218
219
def __enter__(self):
220
return self
221
222
def __exit__(self, exc_type, exc_value, traceback):
223
self._cleanup()
224
return False
225
226
def __del__(self):
227
self._cleanup()
228
229
def _cleanup(self):
230
if self.tempdir is not None:
231
# Delete contents of tempdir
232
for root, dirs, files in os.walk(self.tempdir,
233
topdown=False):
234
for filename in files:
235
os.remove(os.path.join(root, filename))
236
for dirname in dirs:
237
os.rmdir(os.path.join(root, dirname))
238
# Remove tempdir
239
os.rmdir(self.tempdir)
240
self.tempdir = None
241
242
def password_encode(self, password):
243
# Passphrase can not be empty and can not contain newlines or
244
# NUL bytes. So we prefix it and hex encode it.
245
encoded = b"mandos" + binascii.hexlify(password)
246
if len(encoded) > 2048:
247
# GnuPG can't handle long passwords, so encode differently
248
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
249
.replace(b"\n", b"\\n")
250
.replace(b"\0", b"\\x00"))
251
return encoded
252
253
def encrypt(self, data, password):
254
passphrase = self.password_encode(password)
255
with tempfile.NamedTemporaryFile(
256
dir=self.tempdir) as passfile:
257
passfile.write(passphrase)
258
passfile.flush()
259
proc = subprocess.Popen([self.gpg, '--symmetric',
260
'--passphrase-file',
261
passfile.name]
262
+ self.gnupgargs,
263
stdin=subprocess.PIPE,
264
stdout=subprocess.PIPE,
265
stderr=subprocess.PIPE)
266
ciphertext, err = proc.communicate(input=data)
267
if proc.returncode != 0:
268
raise PGPError(err)
269
return ciphertext
270
271
def decrypt(self, data, password):
272
passphrase = self.password_encode(password)
273
with tempfile.NamedTemporaryFile(
274
dir=self.tempdir) as passfile:
275
passfile.write(passphrase)
276
passfile.flush()
277
proc = subprocess.Popen([self.gpg, '--decrypt',
278
'--passphrase-file',
279
passfile.name]
280
+ self.gnupgargs,
281
stdin=subprocess.PIPE,
282
stdout=subprocess.PIPE,
283
stderr=subprocess.PIPE)
284
decrypted_plaintext, err = proc.communicate(input=data)
285
if proc.returncode != 0:
286
raise PGPError(err)
287
return decrypted_plaintext
288
289
290
# Pretend that we have an Avahi module
291
class avahi:
292
"""This isn't so much a class as it is a module-like namespace."""
293
IF_UNSPEC = -1 # avahi-common/address.h
294
PROTO_UNSPEC = -1 # avahi-common/address.h
295
PROTO_INET = 0 # avahi-common/address.h
296
PROTO_INET6 = 1 # avahi-common/address.h
297
DBUS_NAME = "org.freedesktop.Avahi"
298
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
299
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
300
DBUS_PATH_SERVER = "/"
301
302
@staticmethod
303
def string_array_to_txt_array(t):
304
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
305
for s in t), signature="ay")
306
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
307
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
308
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
309
SERVER_INVALID = 0 # avahi-common/defs.h
310
SERVER_REGISTERING = 1 # avahi-common/defs.h
311
SERVER_RUNNING = 2 # avahi-common/defs.h
312
SERVER_COLLISION = 3 # avahi-common/defs.h
313
SERVER_FAILURE = 4 # avahi-common/defs.h
314
80
315
81
316
class AvahiError(Exception):
82
def __init__(self, value):
317
def __init__(self, value, *args, **kwargs):
83
318
self.value = value
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
319
return super(AvahiError, self).__init__(value, *args,
320
**kwargs)
321
87
322
88
323
class AvahiServiceError(AvahiError):
89
324
pass
90
325
326
91
327
class AvahiGroupError(AvahiError):
92
328
pass
93
329
94
330
95
class AvahiService(object):
331
class AvahiService:
96
332
"""An Avahi (Zeroconf) service.
333
97
334
Attributes:
98
335
interface: integer; avahi.IF_UNSPEC or an interface index.
99
336
Used to optionally bind to the specified interface.
100
337
name: string; Example: 'Mandos'
101
338
type: string; Example: '_mandos._tcp'.
102
See <http://www.dns-sd.org/ServiceTypes.html>
339
See <https://www.iana.org/assignments/service-names-port-numbers>
103
340
port: integer; what port to announce
104
341
TXT: list of strings; TXT record for the service
105
342
domain: string; Domain to publish on, default to .local if empty.
107
344
max_renames: integer; maximum number of renames
108
345
rename_count: integer; counter so we only rename after collisions
109
346
a sensible number of times
347
group: D-Bus Entry Group
348
server: D-Bus Server
349
bus: dbus.SystemBus()
110
350
"""
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
351
352
def __init__(self,
353
interface=avahi.IF_UNSPEC,
354
name=None,
355
servicetype=None,
356
port=None,
357
TXT=None,
358
domain="",
359
host="",
360
max_renames=32768,
361
protocol=avahi.PROTO_UNSPEC,
362
bus=None):
114
363
self.interface = interface
115
364
self.name = name
116
365
self.type = servicetype
117
366
self.port = port
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
367
self.TXT = TXT if TXT is not None else []
122
368
self.domain = domain
123
369
self.host = host
124
370
self.rename_count = 0
125
371
self.max_renames = max_renames
126
def rename(self):
372
self.protocol = protocol
373
self.group = None # our entry group
374
self.server = None
375
self.bus = bus
376
self.entry_group_state_changed_match = None
377
378
def rename(self, remove=True):
127
379
"""Derived from the Avahi example code"""
128
380
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
381
logger.critical("No suitable Zeroconf service name found"
382
" after %i retries, exiting.",
131
383
self.rename_count)
132
384
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
385
self.name = str(
386
self.server.GetAlternativeServiceName(self.name))
141
387
self.rename_count += 1
388
logger.info("Changing Zeroconf service name to %r ...",
389
self.name)
390
if remove:
391
self.remove()
392
try:
393
self.add()
394
except dbus.exceptions.DBusException as error:
395
if (error.get_dbus_name()
396
== "org.freedesktop.Avahi.CollisionError"):
397
logger.info("Local Zeroconf service name collision.")
398
return self.rename(remove=False)
399
else:
400
logger.critical("D-Bus Exception", exc_info=error)
401
self.cleanup()
402
os._exit(1)
403
142
404
def remove(self):
143
405
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
406
if self.entry_group_state_changed_match is not None:
407
self.entry_group_state_changed_match.remove()
408
self.entry_group_state_changed_match = None
409
if self.group is not None:
410
self.group.Reset()
411
146
412
def add(self):
147
413
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
class Client(object):
414
self.remove()
415
if self.group is None:
416
self.group = dbus.Interface(
417
self.bus.get_object(avahi.DBUS_NAME,
418
self.server.EntryGroupNew()),
419
avahi.DBUS_INTERFACE_ENTRY_GROUP)
420
self.entry_group_state_changed_match = (
421
self.group.connect_to_signal(
422
'StateChanged', self.entry_group_state_changed))
423
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
424
self.name, self.type)
425
self.group.AddService(
426
self.interface,
427
self.protocol,
428
dbus.UInt32(0), # flags
429
self.name, self.type,
430
self.domain, self.host,
431
dbus.UInt16(self.port),
432
avahi.string_array_to_txt_array(self.TXT))
433
self.group.Commit()
434
435
def entry_group_state_changed(self, state, error):
436
"""Derived from the Avahi example code"""
437
logger.debug("Avahi entry group state change: %i", state)
438
439
if state == avahi.ENTRY_GROUP_ESTABLISHED:
440
logger.debug("Zeroconf service established.")
441
elif state == avahi.ENTRY_GROUP_COLLISION:
442
logger.info("Zeroconf service name collision.")
443
self.rename()
444
elif state == avahi.ENTRY_GROUP_FAILURE:
445
logger.critical("Avahi: Error in group state changed %s",
446
str(error))
447
raise AvahiGroupError("State changed: {!s}".format(error))
448
449
def cleanup(self):
450
"""Derived from the Avahi example code"""
451
if self.group is not None:
452
try:
453
self.group.Free()
454
except (dbus.exceptions.UnknownMethodException,
455
dbus.exceptions.DBusException):
456
pass
457
self.group = None
458
self.remove()
459
460
def server_state_changed(self, state, error=None):
461
"""Derived from the Avahi example code"""
462
logger.debug("Avahi server state change: %i", state)
463
bad_states = {
464
avahi.SERVER_INVALID: "Zeroconf server invalid",
465
avahi.SERVER_REGISTERING: None,
466
avahi.SERVER_COLLISION: "Zeroconf server name collision",
467
avahi.SERVER_FAILURE: "Zeroconf server failure",
468
}
469
if state in bad_states:
470
if bad_states[state] is not None:
471
if error is None:
472
logger.error(bad_states[state])
473
else:
474
logger.error(bad_states[state] + ": %r", error)
475
self.cleanup()
476
elif state == avahi.SERVER_RUNNING:
477
try:
478
self.add()
479
except dbus.exceptions.DBusException as error:
480
if (error.get_dbus_name()
481
== "org.freedesktop.Avahi.CollisionError"):
482
logger.info("Local Zeroconf service name"
483
" collision.")
484
return self.rename(remove=False)
485
else:
486
logger.critical("D-Bus Exception", exc_info=error)
487
self.cleanup()
488
os._exit(1)
489
else:
490
if error is None:
491
logger.debug("Unknown state: %r", state)
492
else:
493
logger.debug("Unknown state: %r: %r", state, error)
494
495
def activate(self):
496
"""Derived from the Avahi example code"""
497
if self.server is None:
498
self.server = dbus.Interface(
499
self.bus.get_object(avahi.DBUS_NAME,
500
avahi.DBUS_PATH_SERVER,
501
follow_name_owner_changes=True),
502
avahi.DBUS_INTERFACE_SERVER)
503
self.server.connect_to_signal("StateChanged",
504
self.server_state_changed)
505
self.server_state_changed(self.server.GetState())
506
507
508
class AvahiServiceToSyslog(AvahiService):
509
def rename(self, *args, **kwargs):
510
"""Add the new name to the syslog messages"""
511
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
512
syslogger.setFormatter(logging.Formatter(
513
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
514
.format(self.name)))
515
return ret
516
517
518
# Pretend that we have a GnuTLS module
519
class gnutls:
520
"""This isn't so much a class as it is a module-like namespace."""
521
522
library = ctypes.util.find_library("gnutls")
523
if library is None:
524
library = ctypes.util.find_library("gnutls-deb0")
525
_library = ctypes.cdll.LoadLibrary(library)
526
del library
527
528
# Unless otherwise indicated, the constants and types below are
529
# all from the gnutls/gnutls.h C header file.
530
531
# Constants
532
E_SUCCESS = 0
533
E_INTERRUPTED = -52
534
E_AGAIN = -28
535
CRT_OPENPGP = 2
536
CRT_RAWPK = 3
537
CLIENT = 2
538
SHUT_RDWR = 0
539
CRD_CERTIFICATE = 1
540
E_NO_CERTIFICATE_FOUND = -49
541
X509_FMT_DER = 0
542
NO_TICKETS = 1<<10
543
ENABLE_RAWPK = 1<<18
544
CTYPE_PEERS = 3
545
KEYID_USE_SHA256 = 1 # gnutls/x509.h
546
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
547
548
# Types
549
class session_int(ctypes.Structure):
550
_fields_ = []
551
session_t = ctypes.POINTER(session_int)
552
553
class certificate_credentials_st(ctypes.Structure):
554
_fields_ = []
555
certificate_credentials_t = ctypes.POINTER(
556
certificate_credentials_st)
557
certificate_type_t = ctypes.c_int
558
559
class datum_t(ctypes.Structure):
560
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
561
('size', ctypes.c_uint)]
562
563
class openpgp_crt_int(ctypes.Structure):
564
_fields_ = []
565
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
566
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
567
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
568
credentials_type_t = ctypes.c_int
569
transport_ptr_t = ctypes.c_void_p
570
close_request_t = ctypes.c_int
571
572
# Exceptions
573
class Error(Exception):
574
def __init__(self, message=None, code=None, args=()):
575
# Default usage is by a message string, but if a return
576
# code is passed, convert it to a string with
577
# gnutls.strerror()
578
self.code = code
579
if message is None and code is not None:
580
message = gnutls.strerror(code)
581
return super(gnutls.Error, self).__init__(
582
message, *args)
583
584
class CertificateSecurityError(Error):
585
pass
586
587
# Classes
588
class Credentials:
589
def __init__(self):
590
self._c_object = gnutls.certificate_credentials_t()
591
gnutls.certificate_allocate_credentials(
592
ctypes.byref(self._c_object))
593
self.type = gnutls.CRD_CERTIFICATE
594
595
def __del__(self):
596
gnutls.certificate_free_credentials(self._c_object)
597
598
class ClientSession:
599
def __init__(self, socket, credentials=None):
600
self._c_object = gnutls.session_t()
601
gnutls_flags = gnutls.CLIENT
602
if gnutls.check_version(b"3.5.6"):
603
gnutls_flags |= gnutls.NO_TICKETS
604
if gnutls.has_rawpk:
605
gnutls_flags |= gnutls.ENABLE_RAWPK
606
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
607
del gnutls_flags
608
gnutls.set_default_priority(self._c_object)
609
gnutls.transport_set_ptr(self._c_object, socket.fileno())
610
gnutls.handshake_set_private_extensions(self._c_object,
611
True)
612
self.socket = socket
613
if credentials is None:
614
credentials = gnutls.Credentials()
615
gnutls.credentials_set(self._c_object, credentials.type,
616
ctypes.cast(credentials._c_object,
617
ctypes.c_void_p))
618
self.credentials = credentials
619
620
def __del__(self):
621
gnutls.deinit(self._c_object)
622
623
def handshake(self):
624
return gnutls.handshake(self._c_object)
625
626
def send(self, data):
627
data = bytes(data)
628
data_len = len(data)
629
while data_len > 0:
630
data_len -= gnutls.record_send(self._c_object,
631
data[-data_len:],
632
data_len)
633
634
def bye(self):
635
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
636
637
# Error handling functions
638
def _error_code(result):
639
"""A function to raise exceptions on errors, suitable
640
for the 'restype' attribute on ctypes functions"""
641
if result >= 0:
642
return result
643
if result == gnutls.E_NO_CERTIFICATE_FOUND:
644
raise gnutls.CertificateSecurityError(code=result)
645
raise gnutls.Error(code=result)
646
647
def _retry_on_error(result, func, arguments):
648
"""A function to retry on some errors, suitable
649
for the 'errcheck' attribute on ctypes functions"""
650
while result < 0:
651
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
652
return _error_code(result)
653
result = func(*arguments)
654
return result
655
656
# Unless otherwise indicated, the function declarations below are
657
# all from the gnutls/gnutls.h C header file.
658
659
# Functions
660
priority_set_direct = _library.gnutls_priority_set_direct
661
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
662
ctypes.POINTER(ctypes.c_char_p)]
663
priority_set_direct.restype = _error_code
664
665
init = _library.gnutls_init
666
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
667
init.restype = _error_code
668
669
set_default_priority = _library.gnutls_set_default_priority
670
set_default_priority.argtypes = [session_t]
671
set_default_priority.restype = _error_code
672
673
record_send = _library.gnutls_record_send
674
record_send.argtypes = [session_t, ctypes.c_void_p,
675
ctypes.c_size_t]
676
record_send.restype = ctypes.c_ssize_t
677
record_send.errcheck = _retry_on_error
678
679
certificate_allocate_credentials = (
680
_library.gnutls_certificate_allocate_credentials)
681
certificate_allocate_credentials.argtypes = [
682
ctypes.POINTER(certificate_credentials_t)]
683
certificate_allocate_credentials.restype = _error_code
684
685
certificate_free_credentials = (
686
_library.gnutls_certificate_free_credentials)
687
certificate_free_credentials.argtypes = [
688
certificate_credentials_t]
689
certificate_free_credentials.restype = None
690
691
handshake_set_private_extensions = (
692
_library.gnutls_handshake_set_private_extensions)
693
handshake_set_private_extensions.argtypes = [session_t,
694
ctypes.c_int]
695
handshake_set_private_extensions.restype = None
696
697
credentials_set = _library.gnutls_credentials_set
698
credentials_set.argtypes = [session_t, credentials_type_t,
699
ctypes.c_void_p]
700
credentials_set.restype = _error_code
701
702
strerror = _library.gnutls_strerror
703
strerror.argtypes = [ctypes.c_int]
704
strerror.restype = ctypes.c_char_p
705
706
certificate_type_get = _library.gnutls_certificate_type_get
707
certificate_type_get.argtypes = [session_t]
708
certificate_type_get.restype = _error_code
709
710
certificate_get_peers = _library.gnutls_certificate_get_peers
711
certificate_get_peers.argtypes = [session_t,
712
ctypes.POINTER(ctypes.c_uint)]
713
certificate_get_peers.restype = ctypes.POINTER(datum_t)
714
715
global_set_log_level = _library.gnutls_global_set_log_level
716
global_set_log_level.argtypes = [ctypes.c_int]
717
global_set_log_level.restype = None
718
719
global_set_log_function = _library.gnutls_global_set_log_function
720
global_set_log_function.argtypes = [log_func]
721
global_set_log_function.restype = None
722
723
deinit = _library.gnutls_deinit
724
deinit.argtypes = [session_t]
725
deinit.restype = None
726
727
handshake = _library.gnutls_handshake
728
handshake.argtypes = [session_t]
729
handshake.restype = _error_code
730
handshake.errcheck = _retry_on_error
731
732
transport_set_ptr = _library.gnutls_transport_set_ptr
733
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
734
transport_set_ptr.restype = None
735
736
bye = _library.gnutls_bye
737
bye.argtypes = [session_t, close_request_t]
738
bye.restype = _error_code
739
bye.errcheck = _retry_on_error
740
741
check_version = _library.gnutls_check_version
742
check_version.argtypes = [ctypes.c_char_p]
743
check_version.restype = ctypes.c_char_p
744
745
_need_version = b"3.3.0"
746
if check_version(_need_version) is None:
747
raise self.Error("Needs GnuTLS {} or later"
748
.format(_need_version))
749
750
_tls_rawpk_version = b"3.6.6"
751
has_rawpk = bool(check_version(_tls_rawpk_version))
752
753
if has_rawpk:
754
# Types
755
class pubkey_st(ctypes.Structure):
756
_fields = []
757
pubkey_t = ctypes.POINTER(pubkey_st)
758
759
x509_crt_fmt_t = ctypes.c_int
760
761
# All the function declarations below are from gnutls/abstract.h
762
pubkey_init = _library.gnutls_pubkey_init
763
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
764
pubkey_init.restype = _error_code
765
766
pubkey_import = _library.gnutls_pubkey_import
767
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
768
x509_crt_fmt_t]
769
pubkey_import.restype = _error_code
770
771
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
772
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
773
ctypes.POINTER(ctypes.c_ubyte),
774
ctypes.POINTER(ctypes.c_size_t)]
775
pubkey_get_key_id.restype = _error_code
776
777
pubkey_deinit = _library.gnutls_pubkey_deinit
778
pubkey_deinit.argtypes = [pubkey_t]
779
pubkey_deinit.restype = None
780
else:
781
# All the function declarations below are from gnutls/openpgp.h
782
783
openpgp_crt_init = _library.gnutls_openpgp_crt_init
784
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
785
openpgp_crt_init.restype = _error_code
786
787
openpgp_crt_import = _library.gnutls_openpgp_crt_import
788
openpgp_crt_import.argtypes = [openpgp_crt_t,
789
ctypes.POINTER(datum_t),
790
openpgp_crt_fmt_t]
791
openpgp_crt_import.restype = _error_code
792
793
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
794
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
795
ctypes.POINTER(ctypes.c_uint)]
796
openpgp_crt_verify_self.restype = _error_code
797
798
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
799
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
800
openpgp_crt_deinit.restype = None
801
802
openpgp_crt_get_fingerprint = (
803
_library.gnutls_openpgp_crt_get_fingerprint)
804
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
805
ctypes.c_void_p,
806
ctypes.POINTER(
807
ctypes.c_size_t)]
808
openpgp_crt_get_fingerprint.restype = _error_code
809
810
if check_version(b"3.6.4"):
811
certificate_type_get2 = _library.gnutls_certificate_type_get2
812
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
813
certificate_type_get2.restype = _error_code
814
815
# Remove non-public functions
816
del _error_code, _retry_on_error
817
818
819
def call_pipe(connection, # : multiprocessing.Connection
820
func, *args, **kwargs):
821
"""This function is meant to be called by multiprocessing.Process
822
823
This function runs func(*args, **kwargs), and writes the resulting
824
return value on the provided multiprocessing.Connection.
825
"""
826
connection.send(func(*args, **kwargs))
827
connection.close()
828
829
830
class Client:
174
831
"""A representation of a client host served by this server.
832
175
833
Attributes:
176
name: string; from the config file, used in log messages
177
fingerprint: string (40 or 32 hexadecimal digits); used to
178
uniquely identify the client
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
185
interval: datetime.timedelta(); How often to start a new checker
186
stop_hook: If set, called by stop() as stop_hook(self)
187
checker: subprocess.Popen(); a running checker process used
188
to see if the client lives.
189
'None' if no process is running.
190
checker_initiator_tag: a gobject event source tag, or None
191
stop_initiator_tag: - '' -
192
checker_callback_tag: - '' -
193
checker_command: string; External command which is run to check if
194
client lives. %() expansions are done at
834
approved: bool(); 'None' if not yet approved/disapproved
835
approval_delay: datetime.timedelta(); Time to wait for approval
836
approval_duration: datetime.timedelta(); Duration of one approval
837
checker: multiprocessing.Process(); a running checker process used
838
to see if the client lives. 'None' if no process is
839
running.
840
checker_callback_tag: a GLib event source tag, or None
841
checker_command: string; External command which is run to check
842
if client lives. %() expansions are done at
195
843
runtime with vars(self) as dict, so that for
196
844
instance %(name)s can be used in the command.
197
Private attibutes:
198
_timeout: Real variable for 'timeout'
199
_interval: Real variable for 'interval'
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
201
_interval_milliseconds: - '' -
845
checker_initiator_tag: a GLib event source tag, or None
846
created: datetime.datetime(); (UTC) object creation
847
client_structure: Object describing what attributes a client has
848
and is used for storing the client at exit
849
current_checker_command: string; current running checker_command
850
disable_initiator_tag: a GLib event source tag, or None
851
enabled: bool()
852
fingerprint: string (40 or 32 hexadecimal digits); used to
853
uniquely identify an OpenPGP client
854
key_id: string (64 hexadecimal digits); used to uniquely identify
855
a client using raw public keys
856
host: string; available for use by the checker command
857
interval: datetime.timedelta(); How often to start a new checker
858
last_approval_request: datetime.datetime(); (UTC) or None
859
last_checked_ok: datetime.datetime(); (UTC) or None
860
last_checker_status: integer between 0 and 255 reflecting exit
861
status of last checker. -1 reflects crashed
862
checker, -2 means no checker completed yet.
863
last_checker_signal: The signal which killed the last checker, if
864
last_checker_status is -1
865
last_enabled: datetime.datetime(); (UTC) or None
866
name: string; from the config file, used in log messages and
867
D-Bus identifiers
868
secret: bytestring; sent verbatim (over TLS) to client
869
timeout: datetime.timedelta(); How long from last_checked_ok
870
until this client is disabled
871
extended_timeout: extra long timeout when secret has been sent
872
runtime_expansions: Allowed attributes for runtime expansion.
873
expires: datetime.datetime(); time (UTC) when a client will be
874
disabled, or None
875
server_settings: The server_settings dict from main()
202
876
"""
203
def _set_timeout(self, timeout):
204
"Setter function for 'timeout' attribute"
205
self._timeout = timeout
206
self._timeout_milliseconds = ((self.timeout.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.timeout.seconds * 1000)
209
+ (self.timeout.microseconds
210
// 1000))
211
timeout = property(lambda self: self._timeout,
212
_set_timeout)
213
del _set_timeout
214
def _set_interval(self, interval):
215
"Setter function for 'interval' attribute"
216
self._interval = interval
217
self._interval_milliseconds = ((self.interval.days
218
* 24 * 60 * 60 * 1000)
219
+ (self.interval.seconds
220
* 1000)
221
+ (self.interval.microseconds
222
// 1000))
223
interval = property(lambda self: self._interval,
224
_set_interval)
225
del _set_interval
226
def __init__(self, name = None, stop_hook=None, config=None):
227
"""Note: the 'checker' key in 'config' sets the
228
'checker_command' attribute and *not* the 'checker'
229
attribute."""
230
if config is None:
231
config = {}
877
878
runtime_expansions = ("approval_delay", "approval_duration",
879
"created", "enabled", "expires", "key_id",
880
"fingerprint", "host", "interval",
881
"last_approval_request", "last_checked_ok",
882
"last_enabled", "name", "timeout")
883
client_defaults = {
884
"timeout": "PT5M",
885
"extended_timeout": "PT15M",
886
"interval": "PT2M",
887
"checker": "fping -q -- %%(host)s",
888
"host": "",
889
"approval_delay": "PT0S",
890
"approval_duration": "PT1S",
891
"approved_by_default": "True",
892
"enabled": "True",
893
}
894
895
@staticmethod
896
def config_parser(config):
897
"""Construct a new dict of client settings of this form:
898
{ client_name: {setting_name: value, ...}, ...}
899
with exceptions for any special settings as defined above.
900
NOTE: Must be a pure function. Must return the same result
901
value given the same arguments.
902
"""
903
settings = {}
904
for client_name in config.sections():
905
section = dict(config.items(client_name))
906
client = settings[client_name] = {}
907
908
client["host"] = section["host"]
909
# Reformat values from string types to Python types
910
client["approved_by_default"] = config.getboolean(
911
client_name, "approved_by_default")
912
client["enabled"] = config.getboolean(client_name,
913
"enabled")
914
915
# Uppercase and remove spaces from key_id and fingerprint
916
# for later comparison purposes with return value from the
917
# key_id() and fingerprint() functions
918
client["key_id"] = (section.get("key_id", "").upper()
919
.replace(" ", ""))
920
client["fingerprint"] = (section["fingerprint"].upper()
921
.replace(" ", ""))
922
if "secret" in section:
923
client["secret"] = codecs.decode(section["secret"]
924
.encode("utf-8"),
925
"base64")
926
elif "secfile" in section:
927
with open(os.path.expanduser(os.path.expandvars
928
(section["secfile"])),
929
"rb") as secfile:
930
client["secret"] = secfile.read()
931
else:
932
raise TypeError("No secret or secfile for section {}"
933
.format(section))
934
client["timeout"] = string_to_delta(section["timeout"])
935
client["extended_timeout"] = string_to_delta(
936
section["extended_timeout"])
937
client["interval"] = string_to_delta(section["interval"])
938
client["approval_delay"] = string_to_delta(
939
section["approval_delay"])
940
client["approval_duration"] = string_to_delta(
941
section["approval_duration"])
942
client["checker_command"] = section["checker"]
943
client["last_approval_request"] = None
944
client["last_checked_ok"] = None
945
client["last_checker_status"] = -2
946
947
return settings
948
949
def __init__(self, settings, name=None, server_settings=None):
232
950
self.name = name
233
logger.debug(u"Creating client %r", self.name)
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
236
# function
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(os.path.expanduser(os.path.expandvars
244
(config["secfile"])))
245
self.secret = secfile.read()
246
secfile.close()
951
if server_settings is None:
952
server_settings = {}
953
self.server_settings = server_settings
954
# adding all client settings
955
for setting, value in settings.items():
956
setattr(self, setting, value)
957
958
if self.enabled:
959
if not hasattr(self, "last_enabled"):
960
self.last_enabled = datetime.datetime.utcnow()
961
if not hasattr(self, "expires"):
962
self.expires = (datetime.datetime.utcnow()
963
+ self.timeout)
247
964
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.now()
252
self.last_checked_ok = None
253
self.timeout = string_to_delta(config["timeout"])
254
self.interval = string_to_delta(config["interval"])
255
self.stop_hook = stop_hook
965
self.last_enabled = None
966
self.expires = None
967
968
logger.debug("Creating client %r", self.name)
969
logger.debug(" Key ID: %s", self.key_id)
970
logger.debug(" Fingerprint: %s", self.fingerprint)
971
self.created = settings.get("created",
972
datetime.datetime.utcnow())
973
974
# attributes specific for this server instance
256
975
self.checker = None
257
976
self.checker_initiator_tag = None
258
self.stop_initiator_tag = None
977
self.disable_initiator_tag = None
259
978
self.checker_callback_tag = None
260
self.check_command = config["checker"]
261
def start(self):
979
self.current_checker_command = None
980
self.approved = None
981
self.approvals_pending = 0
982
self.changedstate = multiprocessing_manager.Condition(
983
multiprocessing_manager.Lock())
984
self.client_structure = [attr
985
for attr in self.__dict__.keys()
986
if not attr.startswith("_")]
987
self.client_structure.append("client_structure")
988
989
for name, t in inspect.getmembers(
990
type(self), lambda obj: isinstance(obj, property)):
991
if not name.startswith("_"):
992
self.client_structure.append(name)
993
994
# Send notice to process children that client state has changed
995
def send_changedstate(self):
996
with self.changedstate:
997
self.changedstate.notify_all()
998
999
def enable(self):
262
1000
"""Start this client's checker and timeout hooks"""
1001
if getattr(self, "enabled", False):
1002
# Already enabled
1003
return
1004
self.expires = datetime.datetime.utcnow() + self.timeout
1005
self.enabled = True
1006
self.last_enabled = datetime.datetime.utcnow()
1007
self.init_checker()
1008
self.send_changedstate()
1009
1010
def disable(self, quiet=True):
1011
"""Disable this client."""
1012
if not getattr(self, "enabled", False):
1013
return False
1014
if not quiet:
1015
logger.info("Disabling client %s", self.name)
1016
if getattr(self, "disable_initiator_tag", None) is not None:
1017
GLib.source_remove(self.disable_initiator_tag)
1018
self.disable_initiator_tag = None
1019
self.expires = None
1020
if getattr(self, "checker_initiator_tag", None) is not None:
1021
GLib.source_remove(self.checker_initiator_tag)
1022
self.checker_initiator_tag = None
1023
self.stop_checker()
1024
self.enabled = False
1025
if not quiet:
1026
self.send_changedstate()
1027
# Do not run this again if called by a GLib.timeout_add
1028
return False
1029
1030
def __del__(self):
1031
self.disable()
1032
1033
def init_checker(self):
263
1034
# Schedule a new checker to be started an 'interval' from now,
264
1035
# and every interval from then on.
265
self.checker_initiator_tag = gobject.timeout_add\
266
(self._interval_milliseconds,
267
self.start_checker)
1036
if self.checker_initiator_tag is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
1038
self.checker_initiator_tag = GLib.timeout_add(
1039
random.randrange(int(self.interval.total_seconds() * 1000
1040
+ 1)),
1041
self.start_checker)
1042
# Schedule a disable() when 'timeout' has passed
1043
if self.disable_initiator_tag is not None:
1044
GLib.source_remove(self.disable_initiator_tag)
1045
self.disable_initiator_tag = GLib.timeout_add(
1046
int(self.timeout.total_seconds() * 1000), self.disable)
268
1047
# Also start a new checker *right now*.
269
1048
self.start_checker()
270
# Schedule a stop() when 'timeout' has passed
271
self.stop_initiator_tag = gobject.timeout_add\
272
(self._timeout_milliseconds,
273
self.stop)
274
def stop(self):
275
"""Stop this client.
276
The possibility that a client might be restarted is left open,
277
but not currently used."""
278
# If this client doesn't have a secret, it is already stopped.
279
if hasattr(self, "secret") and self.secret:
280
logger.info(u"Stopping client %s", self.name)
281
self.secret = None
282
else:
283
return False
284
if getattr(self, "stop_initiator_tag", False):
285
gobject.source_remove(self.stop_initiator_tag)
286
self.stop_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
288
gobject.source_remove(self.checker_initiator_tag)
289
self.checker_initiator_tag = None
290
self.stop_checker()
291
if self.stop_hook:
292
self.stop_hook(self)
293
# Do not run this again if called by a gobject.timeout_add
294
return False
295
def __del__(self):
296
self.stop_hook = None
297
self.stop()
298
def checker_callback(self, pid, condition):
1049
1050
def checker_callback(self, source, condition, connection,
1051
command):
299
1052
"""The checker has completed, so take appropriate actions."""
300
now = datetime.datetime.now()
1053
# Read return code from connection (see call_pipe)
1054
returncode = connection.recv()
1055
connection.close()
1056
if self.checker is not None:
1057
self.checker.join()
301
1058
self.checker_callback_tag = None
302
1059
self.checker = None
303
if os.WIFEXITED(condition) \
304
and (os.WEXITSTATUS(condition) == 0):
305
logger.info(u"Checker for %(name)s succeeded",
306
vars(self))
307
self.last_checked_ok = now
308
gobject.source_remove(self.stop_initiator_tag)
309
self.stop_initiator_tag = gobject.timeout_add\
310
(self._timeout_milliseconds,
311
self.stop)
312
elif not os.WIFEXITED(condition):
313
logger.warning(u"Checker for %(name)s crashed?",
1060
1061
if returncode >= 0:
1062
self.last_checker_status = returncode
1063
self.last_checker_signal = None
1064
if self.last_checker_status == 0:
1065
logger.info("Checker for %(name)s succeeded",
1066
vars(self))
1067
self.checked_ok()
1068
else:
1069
logger.info("Checker for %(name)s failed", vars(self))
1070
else:
1071
self.last_checker_status = -1
1072
self.last_checker_signal = -returncode
1073
logger.warning("Checker for %(name)s crashed?",
314
1074
vars(self))
315
else:
316
logger.info(u"Checker for %(name)s failed",
317
vars(self))
1075
return False
1076
1077
def checked_ok(self):
1078
"""Assert that the client has been seen, alive and well."""
1079
self.last_checked_ok = datetime.datetime.utcnow()
1080
self.last_checker_status = 0
1081
self.last_checker_signal = None
1082
self.bump_timeout()
1083
1084
def bump_timeout(self, timeout=None):
1085
"""Bump up the timeout for this client."""
1086
if timeout is None:
1087
timeout = self.timeout
1088
if self.disable_initiator_tag is not None:
1089
GLib.source_remove(self.disable_initiator_tag)
1090
self.disable_initiator_tag = None
1091
if getattr(self, "enabled", False):
1092
self.disable_initiator_tag = GLib.timeout_add(
1093
int(timeout.total_seconds() * 1000), self.disable)
1094
self.expires = datetime.datetime.utcnow() + timeout
1095
1096
def need_approval(self):
1097
self.last_approval_request = datetime.datetime.utcnow()
1098
318
1099
def start_checker(self):
319
1100
"""Start a new checker subprocess if one is not running.
1101
320
1102
If a checker already exists, leave it running and do
321
1103
nothing."""
322
1104
# The reason for not killing a running checker is that if we
323
# did that, then if a checker (for some reason) started
324
# running slowly and taking more than 'interval' time, the
325
# client would inevitably timeout, since no checker would get
326
# a chance to run to completion. If we instead leave running
1105
# did that, and if a checker (for some reason) started running
1106
# slowly and taking more than 'interval' time, then the client
1107
# would inevitably timeout, since no checker would get a
1108
# chance to run to completion. If we instead leave running
327
1109
# checkers alone, the checker would have to take more time
328
# than 'timeout' for the client to be declared invalid, which
329
# is as it should be.
1110
# than 'timeout' for the client to be disabled, which is as it
1111
# should be.
1112
1113
if self.checker is not None and not self.checker.is_alive():
1114
logger.warning("Checker was not alive; joining")
1115
self.checker.join()
1116
self.checker = None
1117
# Start a new checker if needed
330
1118
if self.checker is None:
331
try:
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
334
except TypeError:
335
# Escape attributes for the shell
336
escaped_attrs = dict((key, re.escape(str(val)))
337
for key, val in
338
vars(self).iteritems())
339
try:
340
command = self.check_command % escaped_attrs
341
except TypeError, error:
342
logger.error(u'Could not format string "%s":'
343
u' %s', self.check_command, error)
344
return True # Try again later
345
try:
346
logger.info(u"Starting checker %r for %s",
347
command, self.name)
348
# We don't need to redirect stdout and stderr, since
349
# in normal mode, that is already done by daemon(),
350
# and in debug mode we don't want to. (Stdin is
351
# always replaced by /dev/null.)
352
self.checker = subprocess.Popen(command,
353
close_fds=True,
354
shell=True, cwd="/")
355
self.checker_callback_tag = gobject.child_watch_add\
356
(self.checker.pid,
357
self.checker_callback)
358
except OSError, error:
359
logger.error(u"Failed to start subprocess: %s",
360
error)
361
# Re-run this periodically if run by gobject.timeout_add
1119
# Escape attributes for the shell
1120
escaped_attrs = {
1121
attr: re.escape(str(getattr(self, attr)))
1122
for attr in self.runtime_expansions}
1123
try:
1124
command = self.checker_command % escaped_attrs
1125
except TypeError as error:
1126
logger.error('Could not format string "%s"',
1127
self.checker_command,
1128
exc_info=error)
1129
return True # Try again later
1130
self.current_checker_command = command
1131
logger.info("Starting checker %r for %s", command,
1132
self.name)
1133
# We don't need to redirect stdout and stderr, since
1134
# in normal mode, that is already done by daemon(),
1135
# and in debug mode we don't want to. (Stdin is
1136
# always replaced by /dev/null.)
1137
# The exception is when not debugging but nevertheless
1138
# running in the foreground; use the previously
1139
# created wnull.
1140
popen_args = {"close_fds": True,
1141
"shell": True,
1142
"cwd": "/"}
1143
if (not self.server_settings["debug"]
1144
and self.server_settings["foreground"]):
1145
popen_args.update({"stdout": wnull,
1146
"stderr": wnull})
1147
pipe = multiprocessing.Pipe(duplex=False)
1148
self.checker = multiprocessing.Process(
1149
target=call_pipe,
1150
args=(pipe[1], subprocess.call, command),
1151
kwargs=popen_args)
1152
self.checker.start()
1153
self.checker_callback_tag = GLib.io_add_watch(
1154
GLib.IOChannel.unix_new(pipe[0].fileno()),
1155
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1156
self.checker_callback, pipe[0], command)
1157
# Re-run this periodically if run by GLib.timeout_add
362
1158
return True
1159
363
1160
def stop_checker(self):
364
1161
"""Force the checker process, if any, to stop."""
365
1162
if self.checker_callback_tag:
366
gobject.source_remove(self.checker_callback_tag)
1163
GLib.source_remove(self.checker_callback_tag)
367
1164
self.checker_callback_tag = None
368
1165
if getattr(self, "checker", None) is None:
369
1166
return
370
logger.debug(u"Stopping checker for %(name)s", vars(self))
371
try:
372
os.kill(self.checker.pid, signal.SIGTERM)
373
#os.sleep(0.5)
374
#if self.checker.poll() is None:
375
# os.kill(self.checker.pid, signal.SIGKILL)
376
except OSError, error:
377
if error.errno != errno.ESRCH: # No such process
378
raise
1167
logger.debug("Stopping checker for %(name)s", vars(self))
1168
self.checker.terminate()
379
1169
self.checker = None
380
def still_valid(self):
381
"""Has the timeout not yet passed for this client?"""
382
now = datetime.datetime.now()
383
if self.last_checked_ok is None:
384
return now < (self.created + self.timeout)
385
else:
386
return now < (self.last_checked_ok + self.timeout)
387
388
389
def peer_certificate(session):
390
"Return the peer's OpenPGP certificate as a bytestring"
391
# If not an OpenPGP certificate...
392
if gnutls.library.functions.gnutls_certificate_type_get\
393
(session._c_object) \
394
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
395
# ...do the normal thing
396
return session.peer_certificate
397
list_size = ctypes.c_uint()
398
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
399
(session._c_object, ctypes.byref(list_size))
400
if list_size.value == 0:
401
return None
402
cert = cert_list[0]
403
return ctypes.string_at(cert.data, cert.size)
404
405
406
def fingerprint(openpgp):
407
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
408
# New GnuTLS "datum" with the OpenPGP public key
409
datum = gnutls.library.types.gnutls_datum_t\
410
(ctypes.cast(ctypes.c_char_p(openpgp),
411
ctypes.POINTER(ctypes.c_ubyte)),
412
ctypes.c_uint(len(openpgp)))
413
# New empty GnuTLS certificate
414
crt = gnutls.library.types.gnutls_openpgp_crt_t()
415
gnutls.library.functions.gnutls_openpgp_crt_init\
416
(ctypes.byref(crt))
417
# Import the OpenPGP public key into the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_import\
419
(crt, ctypes.byref(datum),
420
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
421
# Verify the self signature in the key
422
crtverify = ctypes.c_uint()
423
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
424
(crt, 0, ctypes.byref(crtverify))
425
if crtverify.value != 0:
426
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
427
raise gnutls.errors.CertificateSecurityError("Verify failed")
428
# New buffer for the fingerprint
429
buf = ctypes.create_string_buffer(20)
430
buf_len = ctypes.c_size_t()
431
# Get the fingerprint from the certificate into the buffer
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
433
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
434
# Deinit the certificate
435
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
436
# Convert the buffer to a Python bytestring
437
fpr = ctypes.string_at(buf, buf_len.value)
438
# Convert the bytestring to hexadecimal notation
439
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
440
return hex_fpr
441
442
443
class TCP_handler(SocketServer.BaseRequestHandler, object):
444
"""A TCP request handler class.
445
Instantiated by IPv6_TCPServer for each request to handle it.
1170
1171
1172
def dbus_service_property(dbus_interface,
1173
signature="v",
1174
access="readwrite",
1175
byte_arrays=False):
1176
"""Decorators for marking methods of a DBusObjectWithProperties to
1177
become properties on the D-Bus.
1178
1179
The decorated method will be called with no arguments by "Get"
1180
and with one argument by "Set".
1181
1182
The parameters, where they are supported, are the same as
1183
dbus.service.method, except there is only "signature", since the
1184
type from Get() and the type sent to Set() is the same.
1185
"""
1186
# Encoding deeply encoded byte arrays is not supported yet by the
1187
# "Set" method, so we fail early here:
1188
if byte_arrays and signature != "ay":
1189
raise ValueError("Byte arrays not supported for non-'ay'"
1190
" signature {!r}".format(signature))
1191
1192
def decorator(func):
1193
func._dbus_is_property = True
1194
func._dbus_interface = dbus_interface
1195
func._dbus_signature = signature
1196
func._dbus_access = access
1197
func._dbus_name = func.__name__
1198
if func._dbus_name.endswith("_dbus_property"):
1199
func._dbus_name = func._dbus_name[:-14]
1200
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1201
return func
1202
1203
return decorator
1204
1205
1206
def dbus_interface_annotations(dbus_interface):
1207
"""Decorator for marking functions returning interface annotations
1208
1209
Usage:
1210
1211
@dbus_interface_annotations("org.example.Interface")
1212
def _foo(self): # Function name does not matter
1213
return {"org.freedesktop.DBus.Deprecated": "true",
1214
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1215
"false"}
1216
"""
1217
1218
def decorator(func):
1219
func._dbus_is_interface = True
1220
func._dbus_interface = dbus_interface
1221
func._dbus_name = dbus_interface
1222
return func
1223
1224
return decorator
1225
1226
1227
def dbus_annotations(annotations):
1228
"""Decorator to annotate D-Bus methods, signals or properties
1229
Usage:
1230
1231
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1232
"org.freedesktop.DBus.Property."
1233
"EmitsChangedSignal": "false"})
1234
@dbus_service_property("org.example.Interface", signature="b",
1235
access="r")
1236
def Property_dbus_property(self):
1237
return dbus.Boolean(False)
1238
1239
See also the DBusObjectWithAnnotations class.
1240
"""
1241
1242
def decorator(func):
1243
func._dbus_annotations = annotations
1244
return func
1245
1246
return decorator
1247
1248
1249
class DBusPropertyException(dbus.exceptions.DBusException):
1250
"""A base class for D-Bus property-related exceptions
1251
"""
1252
pass
1253
1254
1255
class DBusPropertyAccessException(DBusPropertyException):
1256
"""A property's access permissions disallows an operation.
1257
"""
1258
pass
1259
1260
1261
class DBusPropertyNotFound(DBusPropertyException):
1262
"""An attempt was made to access a non-existing property.
1263
"""
1264
pass
1265
1266
1267
class DBusObjectWithAnnotations(dbus.service.Object):
1268
"""A D-Bus object with annotations.
1269
1270
Classes inheriting from this can use the dbus_annotations
1271
decorator to add annotations to methods or signals.
1272
"""
1273
1274
@staticmethod
1275
def _is_dbus_thing(thing):
1276
"""Returns a function testing if an attribute is a D-Bus thing
1277
1278
If called like _is_dbus_thing("method") it returns a function
1279
suitable for use as predicate to inspect.getmembers().
1280
"""
1281
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1282
False)
1283
1284
def _get_all_dbus_things(self, thing):
1285
"""Returns a generator of (name, attribute) pairs
1286
"""
1287
return ((getattr(athing.__get__(self), "_dbus_name", name),
1288
athing.__get__(self))
1289
for cls in self.__class__.__mro__
1290
for name, athing in
1291
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1292
1293
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1294
out_signature="s",
1295
path_keyword='object_path',
1296
connection_keyword='connection')
1297
def Introspect(self, object_path, connection):
1298
"""Overloading of standard D-Bus method.
1299
1300
Inserts annotation tags on methods and signals.
1301
"""
1302
xmlstring = dbus.service.Object.Introspect(self, object_path,
1303
connection)
1304
try:
1305
document = xml.dom.minidom.parseString(xmlstring)
1306
1307
for if_tag in document.getElementsByTagName("interface"):
1308
# Add annotation tags
1309
for typ in ("method", "signal"):
1310
for tag in if_tag.getElementsByTagName(typ):
1311
annots = dict()
1312
for name, prop in (self.
1313
_get_all_dbus_things(typ)):
1314
if (name == tag.getAttribute("name")
1315
and prop._dbus_interface
1316
== if_tag.getAttribute("name")):
1317
annots.update(getattr(
1318
prop, "_dbus_annotations", {}))
1319
for name, value in annots.items():
1320
ann_tag = document.createElement(
1321
"annotation")
1322
ann_tag.setAttribute("name", name)
1323
ann_tag.setAttribute("value", value)
1324
tag.appendChild(ann_tag)
1325
# Add interface annotation tags
1326
for annotation, value in dict(
1327
itertools.chain.from_iterable(
1328
annotations().items()
1329
for name, annotations
1330
in self._get_all_dbus_things("interface")
1331
if name == if_tag.getAttribute("name")
1332
)).items():
1333
ann_tag = document.createElement("annotation")
1334
ann_tag.setAttribute("name", annotation)
1335
ann_tag.setAttribute("value", value)
1336
if_tag.appendChild(ann_tag)
1337
# Fix argument name for the Introspect method itself
1338
if (if_tag.getAttribute("name")
1339
== dbus.INTROSPECTABLE_IFACE):
1340
for cn in if_tag.getElementsByTagName("method"):
1341
if cn.getAttribute("name") == "Introspect":
1342
for arg in cn.getElementsByTagName("arg"):
1343
if (arg.getAttribute("direction")
1344
== "out"):
1345
arg.setAttribute("name",
1346
"xml_data")
1347
xmlstring = document.toxml("utf-8")
1348
document.unlink()
1349
except (AttributeError, xml.dom.DOMException,
1350
xml.parsers.expat.ExpatError) as error:
1351
logger.error("Failed to override Introspection method",
1352
exc_info=error)
1353
return xmlstring
1354
1355
1356
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1357
"""A D-Bus object with properties.
1358
1359
Classes inheriting from this can use the dbus_service_property
1360
decorator to expose methods as D-Bus properties. It exposes the
1361
standard Get(), Set(), and GetAll() methods on the D-Bus.
1362
"""
1363
1364
def _get_dbus_property(self, interface_name, property_name):
1365
"""Returns a bound method if one exists which is a D-Bus
1366
property with the specified name and interface.
1367
"""
1368
for cls in self.__class__.__mro__:
1369
for name, value in inspect.getmembers(
1370
cls, self._is_dbus_thing("property")):
1371
if (value._dbus_name == property_name
1372
and value._dbus_interface == interface_name):
1373
return value.__get__(self)
1374
1375
# No such property
1376
raise DBusPropertyNotFound("{}:{}.{}".format(
1377
self.dbus_object_path, interface_name, property_name))
1378
1379
@classmethod
1380
def _get_all_interface_names(cls):
1381
"""Get a sequence of all interfaces supported by an object"""
1382
return (name for name in set(getattr(getattr(x, attr),
1383
"_dbus_interface", None)
1384
for x in (inspect.getmro(cls))
1385
for attr in dir(x))
1386
if name is not None)
1387
1388
@dbus.service.method(dbus.PROPERTIES_IFACE,
1389
in_signature="ss",
1390
out_signature="v")
1391
def Get(self, interface_name, property_name):
1392
"""Standard D-Bus property Get() method, see D-Bus standard.
1393
"""
1394
prop = self._get_dbus_property(interface_name, property_name)
1395
if prop._dbus_access == "write":
1396
raise DBusPropertyAccessException(property_name)
1397
value = prop()
1398
if not hasattr(value, "variant_level"):
1399
return value
1400
return type(value)(value, variant_level=value.variant_level+1)
1401
1402
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1403
def Set(self, interface_name, property_name, value):
1404
"""Standard D-Bus property Set() method, see D-Bus standard.
1405
"""
1406
prop = self._get_dbus_property(interface_name, property_name)
1407
if prop._dbus_access == "read":
1408
raise DBusPropertyAccessException(property_name)
1409
if prop._dbus_get_args_options["byte_arrays"]:
1410
# The byte_arrays option is not supported yet on
1411
# signatures other than "ay".
1412
if prop._dbus_signature != "ay":
1413
raise ValueError("Byte arrays not supported for non-"
1414
"'ay' signature {!r}"
1415
.format(prop._dbus_signature))
1416
value = dbus.ByteArray(bytes(value))
1417
prop(value)
1418
1419
@dbus.service.method(dbus.PROPERTIES_IFACE,
1420
in_signature="s",
1421
out_signature="a{sv}")
1422
def GetAll(self, interface_name):
1423
"""Standard D-Bus property GetAll() method, see D-Bus
1424
standard.
1425
1426
Note: Will not include properties with access="write".
1427
"""
1428
properties = {}
1429
for name, prop in self._get_all_dbus_things("property"):
1430
if (interface_name
1431
and interface_name != prop._dbus_interface):
1432
# Interface non-empty but did not match
1433
continue
1434
# Ignore write-only properties
1435
if prop._dbus_access == "write":
1436
continue
1437
value = prop()
1438
if not hasattr(value, "variant_level"):
1439
properties[name] = value
1440
continue
1441
properties[name] = type(value)(
1442
value, variant_level=value.variant_level + 1)
1443
return dbus.Dictionary(properties, signature="sv")
1444
1445
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1446
def PropertiesChanged(self, interface_name, changed_properties,
1447
invalidated_properties):
1448
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1449
standard.
1450
"""
1451
pass
1452
1453
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1454
out_signature="s",
1455
path_keyword='object_path',
1456
connection_keyword='connection')
1457
def Introspect(self, object_path, connection):
1458
"""Overloading of standard D-Bus method.
1459
1460
Inserts property tags and interface annotation tags.
1461
"""
1462
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1463
object_path,
1464
connection)
1465
try:
1466
document = xml.dom.minidom.parseString(xmlstring)
1467
1468
def make_tag(document, name, prop):
1469
e = document.createElement("property")
1470
e.setAttribute("name", name)
1471
e.setAttribute("type", prop._dbus_signature)
1472
e.setAttribute("access", prop._dbus_access)
1473
return e
1474
1475
for if_tag in document.getElementsByTagName("interface"):
1476
# Add property tags
1477
for tag in (make_tag(document, name, prop)
1478
for name, prop
1479
in self._get_all_dbus_things("property")
1480
if prop._dbus_interface
1481
== if_tag.getAttribute("name")):
1482
if_tag.appendChild(tag)
1483
# Add annotation tags for properties
1484
for tag in if_tag.getElementsByTagName("property"):
1485
annots = dict()
1486
for name, prop in self._get_all_dbus_things(
1487
"property"):
1488
if (name == tag.getAttribute("name")
1489
and prop._dbus_interface
1490
== if_tag.getAttribute("name")):
1491
annots.update(getattr(
1492
prop, "_dbus_annotations", {}))
1493
for name, value in annots.items():
1494
ann_tag = document.createElement(
1495
"annotation")
1496
ann_tag.setAttribute("name", name)
1497
ann_tag.setAttribute("value", value)
1498
tag.appendChild(ann_tag)
1499
# Add the names to the return values for the
1500
# "org.freedesktop.DBus.Properties" methods
1501
if (if_tag.getAttribute("name")
1502
== "org.freedesktop.DBus.Properties"):
1503
for cn in if_tag.getElementsByTagName("method"):
1504
if cn.getAttribute("name") == "Get":
1505
for arg in cn.getElementsByTagName("arg"):
1506
if (arg.getAttribute("direction")
1507
== "out"):
1508
arg.setAttribute("name", "value")
1509
elif cn.getAttribute("name") == "GetAll":
1510
for arg in cn.getElementsByTagName("arg"):
1511
if (arg.getAttribute("direction")
1512
== "out"):
1513
arg.setAttribute("name", "props")
1514
xmlstring = document.toxml("utf-8")
1515
document.unlink()
1516
except (AttributeError, xml.dom.DOMException,
1517
xml.parsers.expat.ExpatError) as error:
1518
logger.error("Failed to override Introspection method",
1519
exc_info=error)
1520
return xmlstring
1521
1522
1523
try:
1524
dbus.OBJECT_MANAGER_IFACE
1525
except AttributeError:
1526
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1527
1528
1529
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1530
"""A D-Bus object with an ObjectManager.
1531
1532
Classes inheriting from this exposes the standard
1533
GetManagedObjects call and the InterfacesAdded and
1534
InterfacesRemoved signals on the standard
1535
"org.freedesktop.DBus.ObjectManager" interface.
1536
1537
Note: No signals are sent automatically; they must be sent
1538
manually.
1539
"""
1540
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1541
out_signature="a{oa{sa{sv}}}")
1542
def GetManagedObjects(self):
1543
"""This function must be overridden"""
1544
raise NotImplementedError()
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1547
signature="oa{sa{sv}}")
1548
def InterfacesAdded(self, object_path, interfaces_and_properties):
1549
pass
1550
1551
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1552
def InterfacesRemoved(self, object_path, interfaces):
1553
pass
1554
1555
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1556
out_signature="s",
1557
path_keyword='object_path',
1558
connection_keyword='connection')
1559
def Introspect(self, object_path, connection):
1560
"""Overloading of standard D-Bus method.
1561
1562
Override return argument name of GetManagedObjects to be
1563
"objpath_interfaces_and_properties"
1564
"""
1565
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1566
object_path,
1567
connection)
1568
try:
1569
document = xml.dom.minidom.parseString(xmlstring)
1570
1571
for if_tag in document.getElementsByTagName("interface"):
1572
# Fix argument name for the GetManagedObjects method
1573
if (if_tag.getAttribute("name")
1574
== dbus.OBJECT_MANAGER_IFACE):
1575
for cn in if_tag.getElementsByTagName("method"):
1576
if (cn.getAttribute("name")
1577
== "GetManagedObjects"):
1578
for arg in cn.getElementsByTagName("arg"):
1579
if (arg.getAttribute("direction")
1580
== "out"):
1581
arg.setAttribute(
1582
"name",
1583
"objpath_interfaces"
1584
"_and_properties")
1585
xmlstring = document.toxml("utf-8")
1586
document.unlink()
1587
except (AttributeError, xml.dom.DOMException,
1588
xml.parsers.expat.ExpatError) as error:
1589
logger.error("Failed to override Introspection method",
1590
exc_info=error)
1591
return xmlstring
1592
1593
1594
def datetime_to_dbus(dt, variant_level=0):
1595
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1596
if dt is None:
1597
return dbus.String("", variant_level=variant_level)
1598
return dbus.String(dt.isoformat(), variant_level=variant_level)
1599
1600
1601
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1602
"""A class decorator; applied to a subclass of
1603
dbus.service.Object, it will add alternate D-Bus attributes with
1604
interface names according to the "alt_interface_names" mapping.
1605
Usage:
1606
1607
@alternate_dbus_interfaces({"org.example.Interface":
1608
"net.example.AlternateInterface"})
1609
class SampleDBusObject(dbus.service.Object):
1610
@dbus.service.method("org.example.Interface")
1611
def SampleDBusMethod():
1612
pass
1613
1614
The above "SampleDBusMethod" on "SampleDBusObject" will be
1615
reachable via two interfaces: "org.example.Interface" and
1616
"net.example.AlternateInterface", the latter of which will have
1617
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1618
"true", unless "deprecate" is passed with a False value.
1619
1620
This works for methods and signals, and also for D-Bus properties
1621
(from DBusObjectWithProperties) and interfaces (from the
1622
dbus_interface_annotations decorator).
1623
"""
1624
1625
def wrapper(cls):
1626
for orig_interface_name, alt_interface_name in (
1627
alt_interface_names.items()):
1628
attr = {}
1629
interface_names = set()
1630
# Go though all attributes of the class
1631
for attrname, attribute in inspect.getmembers(cls):
1632
# Ignore non-D-Bus attributes, and D-Bus attributes
1633
# with the wrong interface name
1634
if (not hasattr(attribute, "_dbus_interface")
1635
or not attribute._dbus_interface.startswith(
1636
orig_interface_name)):
1637
continue
1638
# Create an alternate D-Bus interface name based on
1639
# the current name
1640
alt_interface = attribute._dbus_interface.replace(
1641
orig_interface_name, alt_interface_name)
1642
interface_names.add(alt_interface)
1643
# Is this a D-Bus signal?
1644
if getattr(attribute, "_dbus_is_signal", False):
1645
# Extract the original non-method undecorated
1646
# function by black magic
1647
if sys.version_info.major == 2:
1648
nonmethod_func = (dict(
1649
zip(attribute.func_code.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1652
else:
1653
nonmethod_func = (dict(
1654
zip(attribute.__code__.co_freevars,
1655
attribute.__closure__))
1656
["func"].cell_contents)
1657
# Create a new, but exactly alike, function
1658
# object, and decorate it to be a new D-Bus signal
1659
# with the alternate D-Bus interface name
1660
new_function = copy_function(nonmethod_func)
1661
new_function = (dbus.service.signal(
1662
alt_interface,
1663
attribute._dbus_signature)(new_function))
1664
# Copy annotations, if any
1665
try:
1666
new_function._dbus_annotations = dict(
1667
attribute._dbus_annotations)
1668
except AttributeError:
1669
pass
1670
1671
# Define a creator of a function to call both the
1672
# original and alternate functions, so both the
1673
# original and alternate signals gets sent when
1674
# the function is called
1675
def fixscope(func1, func2):
1676
"""This function is a scope container to pass
1677
func1 and func2 to the "call_both" function
1678
outside of its arguments"""
1679
1680
@functools.wraps(func2)
1681
def call_both(*args, **kwargs):
1682
"""This function will emit two D-Bus
1683
signals by calling func1 and func2"""
1684
func1(*args, **kwargs)
1685
func2(*args, **kwargs)
1686
# Make wrapper function look like a D-Bus
1687
# signal
1688
for name, attr in inspect.getmembers(func2):
1689
if name.startswith("_dbus_"):
1690
setattr(call_both, name, attr)
1691
1692
return call_both
1693
# Create the "call_both" function and add it to
1694
# the class
1695
attr[attrname] = fixscope(attribute, new_function)
1696
# Is this a D-Bus method?
1697
elif getattr(attribute, "_dbus_is_method", False):
1698
# Create a new, but exactly alike, function
1699
# object. Decorate it to be a new D-Bus method
1700
# with the alternate D-Bus interface name. Add it
1701
# to the class.
1702
attr[attrname] = (
1703
dbus.service.method(
1704
alt_interface,
1705
attribute._dbus_in_signature,
1706
attribute._dbus_out_signature)
1707
(copy_function(attribute)))
1708
# Copy annotations, if any
1709
try:
1710
attr[attrname]._dbus_annotations = dict(
1711
attribute._dbus_annotations)
1712
except AttributeError:
1713
pass
1714
# Is this a D-Bus property?
1715
elif getattr(attribute, "_dbus_is_property", False):
1716
# Create a new, but exactly alike, function
1717
# object, and decorate it to be a new D-Bus
1718
# property with the alternate D-Bus interface
1719
# name. Add it to the class.
1720
attr[attrname] = (dbus_service_property(
1721
alt_interface, attribute._dbus_signature,
1722
attribute._dbus_access,
1723
attribute._dbus_get_args_options
1724
["byte_arrays"])
1725
(copy_function(attribute)))
1726
# Copy annotations, if any
1727
try:
1728
attr[attrname]._dbus_annotations = dict(
1729
attribute._dbus_annotations)
1730
except AttributeError:
1731
pass
1732
# Is this a D-Bus interface?
1733
elif getattr(attribute, "_dbus_is_interface", False):
1734
# Create a new, but exactly alike, function
1735
# object. Decorate it to be a new D-Bus interface
1736
# with the alternate D-Bus interface name. Add it
1737
# to the class.
1738
attr[attrname] = (
1739
dbus_interface_annotations(alt_interface)
1740
(copy_function(attribute)))
1741
if deprecate:
1742
# Deprecate all alternate interfaces
1743
iname = "_AlternateDBusNames_interface_annotation{}"
1744
for interface_name in interface_names:
1745
1746
@dbus_interface_annotations(interface_name)
1747
def func(self):
1748
return {"org.freedesktop.DBus.Deprecated":
1749
"true"}
1750
# Find an unused name
1751
for aname in (iname.format(i)
1752
for i in itertools.count()):
1753
if aname not in attr:
1754
attr[aname] = func
1755
break
1756
if interface_names:
1757
# Replace the class with a new subclass of it with
1758
# methods, signals, etc. as created above.
1759
if sys.version_info.major == 2:
1760
cls = type(b"{}Alternate".format(cls.__name__),
1761
(cls, ), attr)
1762
else:
1763
cls = type("{}Alternate".format(cls.__name__),
1764
(cls, ), attr)
1765
return cls
1766
1767
return wrapper
1768
1769
1770
@alternate_dbus_interfaces({"se.recompile.Mandos":
1771
"se.bsnet.fukt.Mandos"})
1772
class ClientDBus(Client, DBusObjectWithProperties):
1773
"""A Client class using D-Bus
1774
1775
Attributes:
1776
dbus_object_path: dbus.ObjectPath
1777
bus: dbus.SystemBus()
1778
"""
1779
1780
runtime_expansions = (Client.runtime_expansions
1781
+ ("dbus_object_path", ))
1782
1783
_interface = "se.recompile.Mandos.Client"
1784
1785
# dbus.service.Object doesn't use super(), so we can't either.
1786
1787
def __init__(self, bus=None, *args, **kwargs):
1788
self.bus = bus
1789
Client.__init__(self, *args, **kwargs)
1790
# Only now, when this client is initialized, can it show up on
1791
# the D-Bus
1792
client_object_name = str(self.name).translate(
1793
{ord("."): ord("_"),
1794
ord("-"): ord("_")})
1795
self.dbus_object_path = dbus.ObjectPath(
1796
"/clients/" + client_object_name)
1797
DBusObjectWithProperties.__init__(self, self.bus,
1798
self.dbus_object_path)
1799
1800
def notifychangeproperty(transform_func, dbus_name,
1801
type_func=lambda x: x,
1802
variant_level=1,
1803
invalidate_only=False,
1804
_interface=_interface):
1805
""" Modify a variable so that it's a property which announces
1806
its changes to DBus.
1807
1808
transform_fun: Function that takes a value and a variant_level
1809
and transforms it to a D-Bus type.
1810
dbus_name: D-Bus name of the variable
1811
type_func: Function that transform the value before sending it
1812
to the D-Bus. Default: no transform
1813
variant_level: D-Bus variant level. Default: 1
1814
"""
1815
attrname = "_{}".format(dbus_name)
1816
1817
def setter(self, value):
1818
if hasattr(self, "dbus_object_path"):
1819
if (not hasattr(self, attrname) or
1820
type_func(getattr(self, attrname, None))
1821
!= type_func(value)):
1822
if invalidate_only:
1823
self.PropertiesChanged(
1824
_interface, dbus.Dictionary(),
1825
dbus.Array((dbus_name, )))
1826
else:
1827
dbus_value = transform_func(
1828
type_func(value),
1829
variant_level=variant_level)
1830
self.PropertyChanged(dbus.String(dbus_name),
1831
dbus_value)
1832
self.PropertiesChanged(
1833
_interface,
1834
dbus.Dictionary({dbus.String(dbus_name):
1835
dbus_value}),
1836
dbus.Array())
1837
setattr(self, attrname, value)
1838
1839
return property(lambda self: getattr(self, attrname), setter)
1840
1841
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1842
approvals_pending = notifychangeproperty(dbus.Boolean,
1843
"ApprovalPending",
1844
type_func=bool)
1845
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1846
last_enabled = notifychangeproperty(datetime_to_dbus,
1847
"LastEnabled")
1848
checker = notifychangeproperty(
1849
dbus.Boolean, "CheckerRunning",
1850
type_func=lambda checker: checker is not None)
1851
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1852
"LastCheckedOK")
1853
last_checker_status = notifychangeproperty(dbus.Int16,
1854
"LastCheckerStatus")
1855
last_approval_request = notifychangeproperty(
1856
datetime_to_dbus, "LastApprovalRequest")
1857
approved_by_default = notifychangeproperty(dbus.Boolean,
1858
"ApprovedByDefault")
1859
approval_delay = notifychangeproperty(
1860
dbus.UInt64, "ApprovalDelay",
1861
type_func=lambda td: td.total_seconds() * 1000)
1862
approval_duration = notifychangeproperty(
1863
dbus.UInt64, "ApprovalDuration",
1864
type_func=lambda td: td.total_seconds() * 1000)
1865
host = notifychangeproperty(dbus.String, "Host")
1866
timeout = notifychangeproperty(
1867
dbus.UInt64, "Timeout",
1868
type_func=lambda td: td.total_seconds() * 1000)
1869
extended_timeout = notifychangeproperty(
1870
dbus.UInt64, "ExtendedTimeout",
1871
type_func=lambda td: td.total_seconds() * 1000)
1872
interval = notifychangeproperty(
1873
dbus.UInt64, "Interval",
1874
type_func=lambda td: td.total_seconds() * 1000)
1875
checker_command = notifychangeproperty(dbus.String, "Checker")
1876
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1877
invalidate_only=True)
1878
1879
del notifychangeproperty
1880
1881
def __del__(self, *args, **kwargs):
1882
try:
1883
self.remove_from_connection()
1884
except LookupError:
1885
pass
1886
if hasattr(DBusObjectWithProperties, "__del__"):
1887
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1888
Client.__del__(self, *args, **kwargs)
1889
1890
def checker_callback(self, source, condition,
1891
connection, command, *args, **kwargs):
1892
ret = Client.checker_callback(self, source, condition,
1893
connection, command, *args,
1894
**kwargs)
1895
exitstatus = self.last_checker_status
1896
if exitstatus >= 0:
1897
# Emit D-Bus signal
1898
self.CheckerCompleted(dbus.Int16(exitstatus),
1899
# This is specific to GNU libC
1900
dbus.Int64(exitstatus << 8),
1901
dbus.String(command))
1902
else:
1903
# Emit D-Bus signal
1904
self.CheckerCompleted(dbus.Int16(-1),
1905
dbus.Int64(
1906
# This is specific to GNU libC
1907
(exitstatus << 8)
1908
| self.last_checker_signal),
1909
dbus.String(command))
1910
return ret
1911
1912
def start_checker(self, *args, **kwargs):
1913
old_checker_pid = getattr(self.checker, "pid", None)
1914
r = Client.start_checker(self, *args, **kwargs)
1915
# Only if new checker process was started
1916
if (self.checker is not None
1917
and old_checker_pid != self.checker.pid):
1918
# Emit D-Bus signal
1919
self.CheckerStarted(self.current_checker_command)
1920
return r
1921
1922
def _reset_approved(self):
1923
self.approved = None
1924
return False
1925
1926
def approve(self, value=True):
1927
self.approved = value
1928
GLib.timeout_add(int(self.approval_duration.total_seconds()
1929
* 1000), self._reset_approved)
1930
self.send_changedstate()
1931
1932
# D-Bus methods, signals & properties
1933
1934
# Interfaces
1935
1936
# Signals
1937
1938
# CheckerCompleted - signal
1939
@dbus.service.signal(_interface, signature="nxs")
1940
def CheckerCompleted(self, exitcode, waitstatus, command):
1941
"D-Bus signal"
1942
pass
1943
1944
# CheckerStarted - signal
1945
@dbus.service.signal(_interface, signature="s")
1946
def CheckerStarted(self, command):
1947
"D-Bus signal"
1948
pass
1949
1950
# PropertyChanged - signal
1951
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1952
@dbus.service.signal(_interface, signature="sv")
1953
def PropertyChanged(self, property, value):
1954
"D-Bus signal"
1955
pass
1956
1957
# GotSecret - signal
1958
@dbus.service.signal(_interface)
1959
def GotSecret(self):
1960
"""D-Bus signal
1961
Is sent after a successful transfer of secret from the Mandos
1962
server to mandos-client
1963
"""
1964
pass
1965
1966
# Rejected - signal
1967
@dbus.service.signal(_interface, signature="s")
1968
def Rejected(self, reason):
1969
"D-Bus signal"
1970
pass
1971
1972
# NeedApproval - signal
1973
@dbus.service.signal(_interface, signature="tb")
1974
def NeedApproval(self, timeout, default):
1975
"D-Bus signal"
1976
return self.need_approval()
1977
1978
# Methods
1979
1980
# Approve - method
1981
@dbus.service.method(_interface, in_signature="b")
1982
def Approve(self, value):
1983
self.approve(value)
1984
1985
# CheckedOK - method
1986
@dbus.service.method(_interface)
1987
def CheckedOK(self):
1988
self.checked_ok()
1989
1990
# Enable - method
1991
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1992
@dbus.service.method(_interface)
1993
def Enable(self):
1994
"D-Bus method"
1995
self.enable()
1996
1997
# StartChecker - method
1998
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1999
@dbus.service.method(_interface)
2000
def StartChecker(self):
2001
"D-Bus method"
2002
self.start_checker()
2003
2004
# Disable - method
2005
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2006
@dbus.service.method(_interface)
2007
def Disable(self):
2008
"D-Bus method"
2009
self.disable()
2010
2011
# StopChecker - method
2012
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2013
@dbus.service.method(_interface)
2014
def StopChecker(self):
2015
self.stop_checker()
2016
2017
# Properties
2018
2019
# ApprovalPending - property
2020
@dbus_service_property(_interface, signature="b", access="read")
2021
def ApprovalPending_dbus_property(self):
2022
return dbus.Boolean(bool(self.approvals_pending))
2023
2024
# ApprovedByDefault - property
2025
@dbus_service_property(_interface,
2026
signature="b",
2027
access="readwrite")
2028
def ApprovedByDefault_dbus_property(self, value=None):
2029
if value is None: # get
2030
return dbus.Boolean(self.approved_by_default)
2031
self.approved_by_default = bool(value)
2032
2033
# ApprovalDelay - property
2034
@dbus_service_property(_interface,
2035
signature="t",
2036
access="readwrite")
2037
def ApprovalDelay_dbus_property(self, value=None):
2038
if value is None: # get
2039
return dbus.UInt64(self.approval_delay.total_seconds()
2040
* 1000)
2041
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2042
2043
# ApprovalDuration - property
2044
@dbus_service_property(_interface,
2045
signature="t",
2046
access="readwrite")
2047
def ApprovalDuration_dbus_property(self, value=None):
2048
if value is None: # get
2049
return dbus.UInt64(self.approval_duration.total_seconds()
2050
* 1000)
2051
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2052
2053
# Name - property
2054
@dbus_annotations(
2055
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2056
@dbus_service_property(_interface, signature="s", access="read")
2057
def Name_dbus_property(self):
2058
return dbus.String(self.name)
2059
2060
# KeyID - property
2061
@dbus_annotations(
2062
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2063
@dbus_service_property(_interface, signature="s", access="read")
2064
def KeyID_dbus_property(self):
2065
return dbus.String(self.key_id)
2066
2067
# Fingerprint - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2070
@dbus_service_property(_interface, signature="s", access="read")
2071
def Fingerprint_dbus_property(self):
2072
return dbus.String(self.fingerprint)
2073
2074
# Host - property
2075
@dbus_service_property(_interface,
2076
signature="s",
2077
access="readwrite")
2078
def Host_dbus_property(self, value=None):
2079
if value is None: # get
2080
return dbus.String(self.host)
2081
self.host = str(value)
2082
2083
# Created - property
2084
@dbus_annotations(
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
@dbus_service_property(_interface, signature="s", access="read")
2087
def Created_dbus_property(self):
2088
return datetime_to_dbus(self.created)
2089
2090
# LastEnabled - property
2091
@dbus_service_property(_interface, signature="s", access="read")
2092
def LastEnabled_dbus_property(self):
2093
return datetime_to_dbus(self.last_enabled)
2094
2095
# Enabled - property
2096
@dbus_service_property(_interface,
2097
signature="b",
2098
access="readwrite")
2099
def Enabled_dbus_property(self, value=None):
2100
if value is None: # get
2101
return dbus.Boolean(self.enabled)
2102
if value:
2103
self.enable()
2104
else:
2105
self.disable()
2106
2107
# LastCheckedOK - property
2108
@dbus_service_property(_interface,
2109
signature="s",
2110
access="readwrite")
2111
def LastCheckedOK_dbus_property(self, value=None):
2112
if value is not None:
2113
self.checked_ok()
2114
return
2115
return datetime_to_dbus(self.last_checked_ok)
2116
2117
# LastCheckerStatus - property
2118
@dbus_service_property(_interface, signature="n", access="read")
2119
def LastCheckerStatus_dbus_property(self):
2120
return dbus.Int16(self.last_checker_status)
2121
2122
# Expires - property
2123
@dbus_service_property(_interface, signature="s", access="read")
2124
def Expires_dbus_property(self):
2125
return datetime_to_dbus(self.expires)
2126
2127
# LastApprovalRequest - property
2128
@dbus_service_property(_interface, signature="s", access="read")
2129
def LastApprovalRequest_dbus_property(self):
2130
return datetime_to_dbus(self.last_approval_request)
2131
2132
# Timeout - property
2133
@dbus_service_property(_interface,
2134
signature="t",
2135
access="readwrite")
2136
def Timeout_dbus_property(self, value=None):
2137
if value is None: # get
2138
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2139
old_timeout = self.timeout
2140
self.timeout = datetime.timedelta(0, 0, 0, value)
2141
# Reschedule disabling
2142
if self.enabled:
2143
now = datetime.datetime.utcnow()
2144
self.expires += self.timeout - old_timeout
2145
if self.expires <= now:
2146
# The timeout has passed
2147
self.disable()
2148
else:
2149
if (getattr(self, "disable_initiator_tag", None)
2150
is None):
2151
return
2152
GLib.source_remove(self.disable_initiator_tag)
2153
self.disable_initiator_tag = GLib.timeout_add(
2154
int((self.expires - now).total_seconds() * 1000),
2155
self.disable)
2156
2157
# ExtendedTimeout - property
2158
@dbus_service_property(_interface,
2159
signature="t",
2160
access="readwrite")
2161
def ExtendedTimeout_dbus_property(self, value=None):
2162
if value is None: # get
2163
return dbus.UInt64(self.extended_timeout.total_seconds()
2164
* 1000)
2165
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2166
2167
# Interval - property
2168
@dbus_service_property(_interface,
2169
signature="t",
2170
access="readwrite")
2171
def Interval_dbus_property(self, value=None):
2172
if value is None: # get
2173
return dbus.UInt64(self.interval.total_seconds() * 1000)
2174
self.interval = datetime.timedelta(0, 0, 0, value)
2175
if getattr(self, "checker_initiator_tag", None) is None:
2176
return
2177
if self.enabled:
2178
# Reschedule checker run
2179
GLib.source_remove(self.checker_initiator_tag)
2180
self.checker_initiator_tag = GLib.timeout_add(
2181
value, self.start_checker)
2182
self.start_checker() # Start one now, too
2183
2184
# Checker - property
2185
@dbus_service_property(_interface,
2186
signature="s",
2187
access="readwrite")
2188
def Checker_dbus_property(self, value=None):
2189
if value is None: # get
2190
return dbus.String(self.checker_command)
2191
self.checker_command = str(value)
2192
2193
# CheckerRunning - property
2194
@dbus_service_property(_interface,
2195
signature="b",
2196
access="readwrite")
2197
def CheckerRunning_dbus_property(self, value=None):
2198
if value is None: # get
2199
return dbus.Boolean(self.checker is not None)
2200
if value:
2201
self.start_checker()
2202
else:
2203
self.stop_checker()
2204
2205
# ObjectPath - property
2206
@dbus_annotations(
2207
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2208
"org.freedesktop.DBus.Deprecated": "true"})
2209
@dbus_service_property(_interface, signature="o", access="read")
2210
def ObjectPath_dbus_property(self):
2211
return self.dbus_object_path # is already a dbus.ObjectPath
2212
2213
# Secret = property
2214
@dbus_annotations(
2215
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2216
"invalidates"})
2217
@dbus_service_property(_interface,
2218
signature="ay",
2219
access="write",
2220
byte_arrays=True)
2221
def Secret_dbus_property(self, value):
2222
self.secret = bytes(value)
2223
2224
del _interface
2225
2226
2227
class ProxyClient:
2228
def __init__(self, child_pipe, key_id, fpr, address):
2229
self._pipe = child_pipe
2230
self._pipe.send(('init', key_id, fpr, address))
2231
if not self._pipe.recv():
2232
raise KeyError(key_id or fpr)
2233
2234
def __getattribute__(self, name):
2235
if name == '_pipe':
2236
return super(ProxyClient, self).__getattribute__(name)
2237
self._pipe.send(('getattr', name))
2238
data = self._pipe.recv()
2239
if data[0] == 'data':
2240
return data[1]
2241
if data[0] == 'function':
2242
2243
def func(*args, **kwargs):
2244
self._pipe.send(('funcall', name, args, kwargs))
2245
return self._pipe.recv()[1]
2246
2247
return func
2248
2249
def __setattr__(self, name, value):
2250
if name == '_pipe':
2251
return super(ProxyClient, self).__setattr__(name, value)
2252
self._pipe.send(('setattr', name, value))
2253
2254
2255
class ClientHandler(socketserver.BaseRequestHandler, object):
2256
"""A class to handle client connections.
2257
2258
Instantiated once for each connection to handle it.
446
2259
Note: This will run in its own forked process."""
447
2260
448
2261
def handle(self):
449
logger.info(u"TCP connection from: %s",
450
unicode(self.client_address))
451
session = gnutls.connection.ClientSession\
452
(self.request, gnutls.connection.X509Credentials())
453
454
line = self.request.makefile().readline()
455
logger.debug(u"Protocol version: %r", line)
456
try:
457
if int(line.strip().split()[0]) > 1:
458
raise RuntimeError
459
except (ValueError, IndexError, RuntimeError), error:
460
logger.error(u"Unknown protocol version: %s", error)
461
return
462
463
# Note: gnutls.connection.X509Credentials is really a generic
464
# GnuTLS certificate credentials object so long as no X.509
465
# keys are added to it. Therefore, we can use it here despite
466
# using OpenPGP certificates.
467
468
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
469
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
470
# "+DHE-DSS"))
471
priority = "NORMAL" # Fallback default, since this
472
# MUST be set.
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
475
gnutls.library.functions.gnutls_priority_set_direct\
476
(session._c_object, priority, None)
477
478
try:
479
session.handshake()
480
except gnutls.errors.GNUTLSError, error:
481
logger.warning(u"Handshake failed: %s", error)
482
# Do not run session.bye() here: the session is not
483
# established. Just abandon the request.
484
return
485
try:
486
fpr = fingerprint(peer_certificate(session))
487
except (TypeError, gnutls.errors.GNUTLSError), error:
488
logger.warning(u"Bad certificate: %s", error)
489
session.bye()
490
return
491
logger.debug(u"Fingerprint: %s", fpr)
492
client = None
493
for c in self.server.clients:
494
if c.fingerprint == fpr:
495
client = c
496
break
497
if not client:
498
logger.warning(u"Client not found for fingerprint: %s",
499
fpr)
500
session.bye()
501
return
502
# Have to check if client.still_valid(), since it is possible
503
# that the client timed out while establishing the GnuTLS
504
# session.
505
if not client.still_valid():
506
logger.warning(u"Client %(name)s is invalid",
507
vars(client))
508
session.bye()
509
return
510
sent_size = 0
511
while sent_size < len(client.secret):
512
sent = session.send(client.secret[sent_size:])
513
logger.debug(u"Sent: %d, remaining: %d",
514
sent, len(client.secret)
515
- (sent_size + sent))
516
sent_size += sent
517
session.bye()
518
519
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2262
with contextlib.closing(self.server.child_pipe) as child_pipe:
2263
logger.info("TCP connection from: %s",
2264
str(self.client_address))
2265
logger.debug("Pipe FD: %d",
2266
self.server.child_pipe.fileno())
2267
2268
session = gnutls.ClientSession(self.request)
2269
2270
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2271
# "+AES-256-CBC", "+SHA1",
2272
# "+COMP-NULL", "+CTYPE-OPENPGP",
2273
# "+DHE-DSS"))
2274
# Use a fallback default, since this MUST be set.
2275
priority = self.server.gnutls_priority
2276
if priority is None:
2277
priority = "NORMAL"
2278
gnutls.priority_set_direct(session._c_object,
2279
priority.encode("utf-8"),
2280
None)
2281
2282
# Start communication using the Mandos protocol
2283
# Get protocol number
2284
line = self.request.makefile().readline()
2285
logger.debug("Protocol version: %r", line)
2286
try:
2287
if int(line.strip().split()[0]) > 1:
2288
raise RuntimeError(line)
2289
except (ValueError, IndexError, RuntimeError) as error:
2290
logger.error("Unknown protocol version: %s", error)
2291
return
2292
2293
# Start GnuTLS connection
2294
try:
2295
session.handshake()
2296
except gnutls.Error as error:
2297
logger.warning("Handshake failed: %s", error)
2298
# Do not run session.bye() here: the session is not
2299
# established. Just abandon the request.
2300
return
2301
logger.debug("Handshake succeeded")
2302
2303
approval_required = False
2304
try:
2305
if gnutls.has_rawpk:
2306
fpr = b""
2307
try:
2308
key_id = self.key_id(
2309
self.peer_certificate(session))
2310
except (TypeError, gnutls.Error) as error:
2311
logger.warning("Bad certificate: %s", error)
2312
return
2313
logger.debug("Key ID: %s", key_id)
2314
2315
else:
2316
key_id = b""
2317
try:
2318
fpr = self.fingerprint(
2319
self.peer_certificate(session))
2320
except (TypeError, gnutls.Error) as error:
2321
logger.warning("Bad certificate: %s", error)
2322
return
2323
logger.debug("Fingerprint: %s", fpr)
2324
2325
try:
2326
client = ProxyClient(child_pipe, key_id, fpr,
2327
self.client_address)
2328
except KeyError:
2329
return
2330
2331
if client.approval_delay:
2332
delay = client.approval_delay
2333
client.approvals_pending += 1
2334
approval_required = True
2335
2336
while True:
2337
if not client.enabled:
2338
logger.info("Client %s is disabled",
2339
client.name)
2340
if self.server.use_dbus:
2341
# Emit D-Bus signal
2342
client.Rejected("Disabled")
2343
return
2344
2345
if client.approved or not client.approval_delay:
2346
# We are approved or approval is disabled
2347
break
2348
elif client.approved is None:
2349
logger.info("Client %s needs approval",
2350
client.name)
2351
if self.server.use_dbus:
2352
# Emit D-Bus signal
2353
client.NeedApproval(
2354
client.approval_delay.total_seconds()
2355
* 1000, client.approved_by_default)
2356
else:
2357
logger.warning("Client %s was not approved",
2358
client.name)
2359
if self.server.use_dbus:
2360
# Emit D-Bus signal
2361
client.Rejected("Denied")
2362
return
2363
2364
# wait until timeout or approved
2365
time = datetime.datetime.now()
2366
client.changedstate.acquire()
2367
client.changedstate.wait(delay.total_seconds())
2368
client.changedstate.release()
2369
time2 = datetime.datetime.now()
2370
if (time2 - time) >= delay:
2371
if not client.approved_by_default:
2372
logger.warning("Client %s timed out while"
2373
" waiting for approval",
2374
client.name)
2375
if self.server.use_dbus:
2376
# Emit D-Bus signal
2377
client.Rejected("Approval timed out")
2378
return
2379
else:
2380
break
2381
else:
2382
delay -= time2 - time
2383
2384
try:
2385
session.send(client.secret)
2386
except gnutls.Error as error:
2387
logger.warning("gnutls send failed",
2388
exc_info=error)
2389
return
2390
2391
logger.info("Sending secret to %s", client.name)
2392
# bump the timeout using extended_timeout
2393
client.bump_timeout(client.extended_timeout)
2394
if self.server.use_dbus:
2395
# Emit D-Bus signal
2396
client.GotSecret()
2397
2398
finally:
2399
if approval_required:
2400
client.approvals_pending -= 1
2401
try:
2402
session.bye()
2403
except gnutls.Error as error:
2404
logger.warning("GnuTLS bye failed",
2405
exc_info=error)
2406
2407
@staticmethod
2408
def peer_certificate(session):
2409
"Return the peer's certificate as a bytestring"
2410
try:
2411
cert_type = gnutls.certificate_type_get2(session._c_object,
2412
gnutls.CTYPE_PEERS)
2413
except AttributeError:
2414
cert_type = gnutls.certificate_type_get(session._c_object)
2415
if gnutls.has_rawpk:
2416
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2417
else:
2418
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2419
# If not a valid certificate type...
2420
if cert_type not in valid_cert_types:
2421
logger.info("Cert type %r not in %r", cert_type,
2422
valid_cert_types)
2423
# ...return invalid data
2424
return b""
2425
list_size = ctypes.c_uint(1)
2426
cert_list = (gnutls.certificate_get_peers
2427
(session._c_object, ctypes.byref(list_size)))
2428
if not bool(cert_list) and list_size.value != 0:
2429
raise gnutls.Error("error getting peer certificate")
2430
if list_size.value == 0:
2431
return None
2432
cert = cert_list[0]
2433
return ctypes.string_at(cert.data, cert.size)
2434
2435
@staticmethod
2436
def key_id(certificate):
2437
"Convert a certificate bytestring to a hexdigit key ID"
2438
# New GnuTLS "datum" with the public key
2439
datum = gnutls.datum_t(
2440
ctypes.cast(ctypes.c_char_p(certificate),
2441
ctypes.POINTER(ctypes.c_ubyte)),
2442
ctypes.c_uint(len(certificate)))
2443
# XXX all these need to be created in the gnutls "module"
2444
# New empty GnuTLS certificate
2445
pubkey = gnutls.pubkey_t()
2446
gnutls.pubkey_init(ctypes.byref(pubkey))
2447
# Import the raw public key into the certificate
2448
gnutls.pubkey_import(pubkey,
2449
ctypes.byref(datum),
2450
gnutls.X509_FMT_DER)
2451
# New buffer for the key ID
2452
buf = ctypes.create_string_buffer(32)
2453
buf_len = ctypes.c_size_t(len(buf))
2454
# Get the key ID from the raw public key into the buffer
2455
gnutls.pubkey_get_key_id(pubkey,
2456
gnutls.KEYID_USE_SHA256,
2457
ctypes.cast(ctypes.byref(buf),
2458
ctypes.POINTER(ctypes.c_ubyte)),
2459
ctypes.byref(buf_len))
2460
# Deinit the certificate
2461
gnutls.pubkey_deinit(pubkey)
2462
2463
# Convert the buffer to a Python bytestring
2464
key_id = ctypes.string_at(buf, buf_len.value)
2465
# Convert the bytestring to hexadecimal notation
2466
hex_key_id = binascii.hexlify(key_id).upper()
2467
return hex_key_id
2468
2469
@staticmethod
2470
def fingerprint(openpgp):
2471
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2472
# New GnuTLS "datum" with the OpenPGP public key
2473
datum = gnutls.datum_t(
2474
ctypes.cast(ctypes.c_char_p(openpgp),
2475
ctypes.POINTER(ctypes.c_ubyte)),
2476
ctypes.c_uint(len(openpgp)))
2477
# New empty GnuTLS certificate
2478
crt = gnutls.openpgp_crt_t()
2479
gnutls.openpgp_crt_init(ctypes.byref(crt))
2480
# Import the OpenPGP public key into the certificate
2481
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2482
gnutls.OPENPGP_FMT_RAW)
2483
# Verify the self signature in the key
2484
crtverify = ctypes.c_uint()
2485
gnutls.openpgp_crt_verify_self(crt, 0,
2486
ctypes.byref(crtverify))
2487
if crtverify.value != 0:
2488
gnutls.openpgp_crt_deinit(crt)
2489
raise gnutls.CertificateSecurityError(code
2490
=crtverify.value)
2491
# New buffer for the fingerprint
2492
buf = ctypes.create_string_buffer(20)
2493
buf_len = ctypes.c_size_t()
2494
# Get the fingerprint from the certificate into the buffer
2495
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2496
ctypes.byref(buf_len))
2497
# Deinit the certificate
2498
gnutls.openpgp_crt_deinit(crt)
2499
# Convert the buffer to a Python bytestring
2500
fpr = ctypes.string_at(buf, buf_len.value)
2501
# Convert the bytestring to hexadecimal notation
2502
hex_fpr = binascii.hexlify(fpr).upper()
2503
return hex_fpr
2504
2505
2506
class MultiprocessingMixIn:
2507
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2508
2509
def sub_process_main(self, request, address):
2510
try:
2511
self.finish_request(request, address)
2512
except Exception:
2513
self.handle_error(request, address)
2514
self.close_request(request)
2515
2516
def process_request(self, request, address):
2517
"""Start a new process to process the request."""
2518
proc = multiprocessing.Process(target=self.sub_process_main,
2519
args=(request, address))
2520
proc.start()
2521
return proc
2522
2523
2524
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2525
""" adds a pipe to the MixIn """
2526
2527
def process_request(self, request, client_address):
2528
"""Overrides and wraps the original process_request().
2529
2530
This function creates a new pipe in self.pipe
2531
"""
2532
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2533
2534
proc = MultiprocessingMixIn.process_request(self, request,
2535
client_address)
2536
self.child_pipe.close()
2537
self.add_pipe(parent_pipe, proc)
2538
2539
def add_pipe(self, parent_pipe, proc):
2540
"""Dummy function; override as necessary"""
2541
raise NotImplementedError()
2542
2543
2544
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2545
socketserver.TCPServer):
2546
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2547
522
2548
Attributes:
523
settings: Server settings
524
clients: Set() of Client objects
525
2549
enabled: Boolean; whether this server is activated yet
2550
interface: None or a network interface name (string)
2551
use_ipv6: Boolean; to use IPv6 or not
526
2552
"""
527
address_family = socket.AF_INET6
528
def __init__(self, *args, **kwargs):
529
if "settings" in kwargs:
530
self.settings = kwargs["settings"]
531
del kwargs["settings"]
532
if "clients" in kwargs:
533
self.clients = kwargs["clients"]
534
del kwargs["clients"]
535
self.enabled = False
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2553
2554
def __init__(self, server_address, RequestHandlerClass,
2555
interface=None,
2556
use_ipv6=True,
2557
socketfd=None):
2558
"""If socketfd is set, use that file descriptor instead of
2559
creating a new one with socket.socket().
2560
"""
2561
self.interface = interface
2562
if use_ipv6:
2563
self.address_family = socket.AF_INET6
2564
if socketfd is not None:
2565
# Save the file descriptor
2566
self.socketfd = socketfd
2567
# Save the original socket.socket() function
2568
self.socket_socket = socket.socket
2569
2570
# To implement --socket, we monkey patch socket.socket.
2571
#
2572
# (When socketserver.TCPServer is a new-style class, we
2573
# could make self.socket into a property instead of monkey
2574
# patching socket.socket.)
2575
#
2576
# Create a one-time-only replacement for socket.socket()
2577
@functools.wraps(socket.socket)
2578
def socket_wrapper(*args, **kwargs):
2579
# Restore original function so subsequent calls are
2580
# not affected.
2581
socket.socket = self.socket_socket
2582
del self.socket_socket
2583
# This time only, return a new socket object from the
2584
# saved file descriptor.
2585
return socket.fromfd(self.socketfd, *args, **kwargs)
2586
# Replace socket.socket() function with wrapper
2587
socket.socket = socket_wrapper
2588
# The socketserver.TCPServer.__init__ will call
2589
# socket.socket(), which might be our replacement,
2590
# socket_wrapper(), if socketfd was set.
2591
socketserver.TCPServer.__init__(self, server_address,
2592
RequestHandlerClass)
2593
537
2594
def server_bind(self):
538
2595
"""This overrides the normal server_bind() function
539
2596
to bind to an interface if one was specified, and also NOT to
540
2597
bind to an address or port if they were not specified."""
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
2598
global SO_BINDTODEVICE
2599
if self.interface is not None:
2600
if SO_BINDTODEVICE is None:
2601
# Fall back to a hard-coded value which seems to be
2602
# common enough.
2603
logger.warning("SO_BINDTODEVICE not found, trying 25")
2604
SO_BINDTODEVICE = 25
544
2605
try:
545
self.socket.setsockopt(socket.SOL_SOCKET,
546
SO_BINDTODEVICE,
547
self.settings["interface"])
548
except socket.error, error:
549
if error[0] == errno.EPERM:
550
logger.error(u"No permission to"
551
u" bind to interface %s",
552
self.settings["interface"])
2606
self.socket.setsockopt(
2607
socket.SOL_SOCKET, SO_BINDTODEVICE,
2608
(self.interface + "\0").encode("utf-8"))
2609
except socket.error as error:
2610
if error.errno == errno.EPERM:
2611
logger.error("No permission to bind to"
2612
" interface %s", self.interface)
2613
elif error.errno == errno.ENOPROTOOPT:
2614
logger.error("SO_BINDTODEVICE not available;"
2615
" cannot bind to interface %s",
2616
self.interface)
2617
elif error.errno == errno.ENODEV:
2618
logger.error("Interface %s does not exist,"
2619
" cannot bind", self.interface)
553
2620
else:
554
raise error
2621
raise
555
2622
# Only bind(2) the socket if we really need to.
556
2623
if self.server_address[0] or self.server_address[1]:
2624
if self.server_address[1]:
2625
self.allow_reuse_address = True
557
2626
if not self.server_address[0]:
558
in6addr_any = "::"
559
self.server_address = (in6addr_any,
2627
if self.address_family == socket.AF_INET6:
2628
any_address = "::" # in6addr_any
2629
else:
2630
any_address = "0.0.0.0" # INADDR_ANY
2631
self.server_address = (any_address,
560
2632
self.server_address[1])
561
2633
elif not self.server_address[1]:
562
self.server_address = (self.server_address[0],
563
0)
564
# if self.settings["interface"]:
2634
self.server_address = (self.server_address[0], 0)
2635
# if self.interface:
565
2636
# self.server_address = (self.server_address[0],
566
2637
# 0, # port
567
2638
# 0, # flowinfo
568
2639
# if_nametoindex
569
# (self.settings
570
# ["interface"]))
571
return super(IPv6_TCPServer, self).server_bind()
2640
# (self.interface))
2641
return socketserver.TCPServer.server_bind(self)
2642
2643
2644
class MandosServer(IPv6_TCPServer):
2645
"""Mandos server.
2646
2647
Attributes:
2648
clients: set of Client objects
2649
gnutls_priority GnuTLS priority string
2650
use_dbus: Boolean; to emit D-Bus signals or not
2651
2652
Assumes a GLib.MainLoop event loop.
2653
"""
2654
2655
def __init__(self, server_address, RequestHandlerClass,
2656
interface=None,
2657
use_ipv6=True,
2658
clients=None,
2659
gnutls_priority=None,
2660
use_dbus=True,
2661
socketfd=None):
2662
self.enabled = False
2663
self.clients = clients
2664
if self.clients is None:
2665
self.clients = {}
2666
self.use_dbus = use_dbus
2667
self.gnutls_priority = gnutls_priority
2668
IPv6_TCPServer.__init__(self, server_address,
2669
RequestHandlerClass,
2670
interface=interface,
2671
use_ipv6=use_ipv6,
2672
socketfd=socketfd)
2673
572
2674
def server_activate(self):
573
2675
if self.enabled:
574
return super(IPv6_TCPServer, self).server_activate()
2676
return socketserver.TCPServer.server_activate(self)
2677
575
2678
def enable(self):
576
2679
self.enabled = True
577
2680
2681
def add_pipe(self, parent_pipe, proc):
2682
# Call "handle_ipc" for both data and EOF events
2683
GLib.io_add_watch(
2684
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2685
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2686
functools.partial(self.handle_ipc,
2687
parent_pipe=parent_pipe,
2688
proc=proc))
2689
2690
def handle_ipc(self, source, condition,
2691
parent_pipe=None,
2692
proc=None,
2693
client_object=None):
2694
# error, or the other end of multiprocessing.Pipe has closed
2695
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2696
# Wait for other process to exit
2697
proc.join()
2698
return False
2699
2700
# Read a request from the child
2701
request = parent_pipe.recv()
2702
command = request[0]
2703
2704
if command == 'init':
2705
key_id = request[1].decode("ascii")
2706
fpr = request[2].decode("ascii")
2707
address = request[3]
2708
2709
for c in self.clients.values():
2710
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2711
continue
2712
if key_id and c.key_id == key_id:
2713
client = c
2714
break
2715
if fpr and c.fingerprint == fpr:
2716
client = c
2717
break
2718
else:
2719
logger.info("Client not found for key ID: %s, address"
2720
": %s", key_id or fpr, address)
2721
if self.use_dbus:
2722
# Emit D-Bus signal
2723
mandos_dbus_service.ClientNotFound(key_id or fpr,
2724
address[0])
2725
parent_pipe.send(False)
2726
return False
2727
2728
GLib.io_add_watch(
2729
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2730
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2731
functools.partial(self.handle_ipc,
2732
parent_pipe=parent_pipe,
2733
proc=proc,
2734
client_object=client))
2735
parent_pipe.send(True)
2736
# remove the old hook in favor of the new above hook on
2737
# same fileno
2738
return False
2739
if command == 'funcall':
2740
funcname = request[1]
2741
args = request[2]
2742
kwargs = request[3]
2743
2744
parent_pipe.send(('data', getattr(client_object,
2745
funcname)(*args,
2746
**kwargs)))
2747
2748
if command == 'getattr':
2749
attrname = request[1]
2750
if isinstance(client_object.__getattribute__(attrname),
2751
collections.Callable):
2752
parent_pipe.send(('function', ))
2753
else:
2754
parent_pipe.send((
2755
'data', client_object.__getattribute__(attrname)))
2756
2757
if command == 'setattr':
2758
attrname = request[1]
2759
value = request[2]
2760
setattr(client_object, attrname, value)
2761
2762
return True
2763
2764
2765
def rfc3339_duration_to_delta(duration):
2766
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2767
2768
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2769
True
2770
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2771
True
2772
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2773
True
2774
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2775
True
2776
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2777
True
2778
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2779
True
2780
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2781
True
2782
"""
2783
2784
# Parsing an RFC 3339 duration with regular expressions is not
2785
# possible - there would have to be multiple places for the same
2786
# values, like seconds. The current code, while more esoteric, is
2787
# cleaner without depending on a parsing library. If Python had a
2788
# built-in library for parsing we would use it, but we'd like to
2789
# avoid excessive use of external libraries.
2790
2791
# New type for defining tokens, syntax, and semantics all-in-one
2792
Token = collections.namedtuple("Token", (
2793
"regexp", # To match token; if "value" is not None, must have
2794
# a "group" containing digits
2795
"value", # datetime.timedelta or None
2796
"followers")) # Tokens valid after this token
2797
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2798
# the "duration" ABNF definition in RFC 3339, Appendix A.
2799
token_end = Token(re.compile(r"$"), None, frozenset())
2800
token_second = Token(re.compile(r"(\d+)S"),
2801
datetime.timedelta(seconds=1),
2802
frozenset((token_end, )))
2803
token_minute = Token(re.compile(r"(\d+)M"),
2804
datetime.timedelta(minutes=1),
2805
frozenset((token_second, token_end)))
2806
token_hour = Token(re.compile(r"(\d+)H"),
2807
datetime.timedelta(hours=1),
2808
frozenset((token_minute, token_end)))
2809
token_time = Token(re.compile(r"T"),
2810
None,
2811
frozenset((token_hour, token_minute,
2812
token_second)))
2813
token_day = Token(re.compile(r"(\d+)D"),
2814
datetime.timedelta(days=1),
2815
frozenset((token_time, token_end)))
2816
token_month = Token(re.compile(r"(\d+)M"),
2817
datetime.timedelta(weeks=4),
2818
frozenset((token_day, token_end)))
2819
token_year = Token(re.compile(r"(\d+)Y"),
2820
datetime.timedelta(weeks=52),
2821
frozenset((token_month, token_end)))
2822
token_week = Token(re.compile(r"(\d+)W"),
2823
datetime.timedelta(weeks=1),
2824
frozenset((token_end, )))
2825
token_duration = Token(re.compile(r"P"), None,
2826
frozenset((token_year, token_month,
2827
token_day, token_time,
2828
token_week)))
2829
# Define starting values:
2830
# Value so far
2831
value = datetime.timedelta()
2832
found_token = None
2833
# Following valid tokens
2834
followers = frozenset((token_duration, ))
2835
# String left to parse
2836
s = duration
2837
# Loop until end token is found
2838
while found_token is not token_end:
2839
# Search for any currently valid tokens
2840
for token in followers:
2841
match = token.regexp.match(s)
2842
if match is not None:
2843
# Token found
2844
if token.value is not None:
2845
# Value found, parse digits
2846
factor = int(match.group(1), 10)
2847
# Add to value so far
2848
value += factor * token.value
2849
# Strip token from string
2850
s = token.regexp.sub("", s, 1)
2851
# Go to found token
2852
found_token = token
2853
# Set valid next tokens
2854
followers = found_token.followers
2855
break
2856
else:
2857
# No currently valid tokens were found
2858
raise ValueError("Invalid RFC 3339 duration: {!r}"
2859
.format(duration))
2860
# End token found
2861
return value
2862
578
2863
579
2864
def string_to_delta(interval):
580
2865
"""Parse a string and return a datetime.timedelta
581
2866
582
>>> string_to_delta('7d')
583
datetime.timedelta(7)
584
>>> string_to_delta('60s')
585
datetime.timedelta(0, 60)
586
>>> string_to_delta('60m')
587
datetime.timedelta(0, 3600)
588
>>> string_to_delta('24h')
589
datetime.timedelta(1)
590
>>> string_to_delta(u'1w')
591
datetime.timedelta(7)
592
>>> string_to_delta('5m 30s')
593
datetime.timedelta(0, 330)
2867
>>> string_to_delta('7d') == datetime.timedelta(7)
2868
True
2869
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2870
True
2871
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2872
True
2873
>>> string_to_delta('24h') == datetime.timedelta(1)
2874
True
2875
>>> string_to_delta('1w') == datetime.timedelta(7)
2876
True
2877
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2878
True
594
2879
"""
2880
2881
try:
2882
return rfc3339_duration_to_delta(interval)
2883
except ValueError:
2884
pass
2885
595
2886
timevalue = datetime.timedelta(0)
596
2887
for s in interval.split():
597
2888
try:
598
suffix = unicode(s[-1])
2889
suffix = s[-1]
599
2890
value = int(s[:-1])
600
if suffix == u"d":
2891
if suffix == "d":
601
2892
delta = datetime.timedelta(value)
602
elif suffix == u"s":
2893
elif suffix == "s":
603
2894
delta = datetime.timedelta(0, value)
604
elif suffix == u"m":
2895
elif suffix == "m":
605
2896
delta = datetime.timedelta(0, 0, 0, 0, value)
606
elif suffix == u"h":
2897
elif suffix == "h":
607
2898
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
608
elif suffix == u"w":
2899
elif suffix == "w":
609
2900
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
610
2901
else:
611
raise ValueError
612
except (ValueError, IndexError):
613
raise ValueError
2902
raise ValueError("Unknown suffix {!r}".format(suffix))
2903
except IndexError as e:
2904
raise ValueError(*(e.args))
614
2905
timevalue += delta
615
2906
return timevalue
616
2907
617
2908
618
def server_state_changed(state):
619
"""Derived from the Avahi example code"""
620
if state == avahi.SERVER_COLLISION:
621
logger.error(u"Zeroconf server name collision")
622
service.remove()
623
elif state == avahi.SERVER_RUNNING:
624
service.add()
625
626
627
def entry_group_state_changed(state, error):
628
"""Derived from the Avahi example code"""
629
logger.debug(u"Avahi state change: %i", state)
630
631
if state == avahi.ENTRY_GROUP_ESTABLISHED:
632
logger.debug(u"Zeroconf service established.")
633
elif state == avahi.ENTRY_GROUP_COLLISION:
634
logger.warning(u"Zeroconf service name collision.")
635
service.rename()
636
elif state == avahi.ENTRY_GROUP_FAILURE:
637
logger.critical(u"Avahi: Error in group state changed %s",
638
unicode(error))
639
raise AvahiGroupError("State changed: %s", str(error))
640
641
def if_nametoindex(interface):
642
"""Call the C function if_nametoindex(), or equivalent"""
643
global if_nametoindex
644
try:
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
647
except (OSError, AttributeError):
648
if "struct" not in sys.modules:
649
import struct
650
if "fcntl" not in sys.modules:
651
import fcntl
652
def if_nametoindex(interface):
653
"Get an interface index the hard way, i.e. using fcntl()"
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
655
s = socket.socket()
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
658
s.close()
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
660
return interface_index
661
return if_nametoindex(interface)
662
663
664
def daemon(nochdir = False, noclose = False):
2909
def daemon(nochdir=False, noclose=False):
665
2910
"""See daemon(3). Standard BSD Unix function.
2911
666
2912
This should really exist as os.daemon, but it doesn't (yet)."""
667
2913
if os.fork():
668
2914
sys.exit()
673
2919
sys.exit()
674
2920
if not noclose:
675
2921
# Close all standard open file descriptors
676
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2922
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
677
2923
if not stat.S_ISCHR(os.fstat(null).st_mode):
678
2924
raise OSError(errno.ENODEV,
679
"/dev/null not a character device")
2925
"{} not a character device"
2926
.format(os.devnull))
680
2927
os.dup2(null, sys.stdin.fileno())
681
2928
os.dup2(null, sys.stdout.fileno())
682
2929
os.dup2(null, sys.stderr.fileno())
685
2932
686
2933
687
2934
def main():
688
parser = OptionParser(version = "%%prog %s" % version)
689
parser.add_option("-i", "--interface", type="string",
690
metavar="IF", help="Bind to interface IF")
691
parser.add_option("-a", "--address", type="string",
692
help="Address to listen for requests on")
693
parser.add_option("-p", "--port", type="int",
694
help="Port number to receive requests on")
695
parser.add_option("--check", action="store_true", default=False,
696
help="Run self-test")
697
parser.add_option("--debug", action="store_true",
698
help="Debug mode; run in foreground and log to"
699
" terminal")
700
parser.add_option("--priority", type="string", help="GnuTLS"
701
" priority string (see GnuTLS documentation)")
702
parser.add_option("--servicename", type="string", metavar="NAME",
703
help="Zeroconf service name")
704
parser.add_option("--configdir", type="string",
705
default="/etc/mandos", metavar="DIR",
706
help="Directory to search for configuration"
707
" files")
708
options = parser.parse_args()[0]
709
710
if options.check:
711
import doctest
712
doctest.testmod()
713
sys.exit()
714
2935
2936
##################################################################
2937
# Parsing of options, both command line and config file
2938
2939
parser = argparse.ArgumentParser()
2940
parser.add_argument("-v", "--version", action="version",
2941
version="%(prog)s {}".format(version),
2942
help="show version number and exit")
2943
parser.add_argument("-i", "--interface", metavar="IF",
2944
help="Bind to interface IF")
2945
parser.add_argument("-a", "--address",
2946
help="Address to listen for requests on")
2947
parser.add_argument("-p", "--port", type=int,
2948
help="Port number to receive requests on")
2949
parser.add_argument("--check", action="store_true",
2950
help="Run self-test")
2951
parser.add_argument("--debug", action="store_true",
2952
help="Debug mode; run in foreground and log"
2953
" to terminal", default=None)
2954
parser.add_argument("--debuglevel", metavar="LEVEL",
2955
help="Debug level for stdout output")
2956
parser.add_argument("--priority", help="GnuTLS"
2957
" priority string (see GnuTLS documentation)")
2958
parser.add_argument("--servicename",
2959
metavar="NAME", help="Zeroconf service name")
2960
parser.add_argument("--configdir",
2961
default="/etc/mandos", metavar="DIR",
2962
help="Directory to search for configuration"
2963
" files")
2964
parser.add_argument("--no-dbus", action="store_false",
2965
dest="use_dbus", help="Do not provide D-Bus"
2966
" system bus interface", default=None)
2967
parser.add_argument("--no-ipv6", action="store_false",
2968
dest="use_ipv6", help="Do not use IPv6",
2969
default=None)
2970
parser.add_argument("--no-restore", action="store_false",
2971
dest="restore", help="Do not restore stored"
2972
" state", default=None)
2973
parser.add_argument("--socket", type=int,
2974
help="Specify a file descriptor to a network"
2975
" socket to use instead of creating one")
2976
parser.add_argument("--statedir", metavar="DIR",
2977
help="Directory to save/restore state in")
2978
parser.add_argument("--foreground", action="store_true",
2979
help="Run in foreground", default=None)
2980
parser.add_argument("--no-zeroconf", action="store_false",
2981
dest="zeroconf", help="Do not use Zeroconf",
2982
default=None)
2983
2984
options = parser.parse_args()
2985
715
2986
# Default values for config file for server-global settings
716
server_defaults = { "interface": "",
717
"address": "",
718
"port": "",
719
"debug": "False",
720
"priority":
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
722
"servicename": "Mandos",
723
}
724
2987
if gnutls.has_rawpk:
2988
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2989
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2990
else:
2991
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2992
":+SIGN-DSA-SHA256")
2993
server_defaults = {"interface": "",
2994
"address": "",
2995
"port": "",
2996
"debug": "False",
2997
"priority": priority,
2998
"servicename": "Mandos",
2999
"use_dbus": "True",
3000
"use_ipv6": "True",
3001
"debuglevel": "",
3002
"restore": "True",
3003
"socket": "",
3004
"statedir": "/var/lib/mandos",
3005
"foreground": "False",
3006
"zeroconf": "True",
3007
}
3008
del priority
3009
725
3010
# Parse config file for server-global settings
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
3011
server_config = configparser.ConfigParser(server_defaults)
727
3012
del server_defaults
728
3013
server_config.read(os.path.join(options.configdir, "mandos.conf"))
729
# Convert the SafeConfigParser object to a dict
3014
# Convert the ConfigParser object to a dict
730
3015
server_settings = server_config.defaults()
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
733
("DEFAULT", "debug")
3016
# Use the appropriate methods on the non-string config options
3017
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3018
"foreground", "zeroconf"):
3019
server_settings[option] = server_config.getboolean("DEFAULT",
3020
option)
3021
if server_settings["port"]:
3022
server_settings["port"] = server_config.getint("DEFAULT",
3023
"port")
3024
if server_settings["socket"]:
3025
server_settings["socket"] = server_config.getint("DEFAULT",
3026
"socket")
3027
# Later, stdin will, and stdout and stderr might, be dup'ed
3028
# over with an opened os.devnull. But we don't want this to
3029
# happen with a supplied network socket.
3030
if 0 <= server_settings["socket"] <= 2:
3031
server_settings["socket"] = os.dup(server_settings
3032
["socket"])
734
3033
del server_config
735
3034
736
3035
# Override the settings from the config file with command line
737
3036
# options, if set.
738
3037
for option in ("interface", "address", "port", "debug",
739
"priority", "servicename", "configdir"):
3038
"priority", "servicename", "configdir", "use_dbus",
3039
"use_ipv6", "debuglevel", "restore", "statedir",
3040
"socket", "foreground", "zeroconf"):
740
3041
value = getattr(options, option)
741
3042
if value is not None:
742
3043
server_settings[option] = value
743
3044
del options
3045
# Force all strings to be unicode
3046
for option in server_settings.keys():
3047
if isinstance(server_settings[option], bytes):
3048
server_settings[option] = (server_settings[option]
3049
.decode("utf-8"))
3050
# Force all boolean options to be boolean
3051
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3052
"foreground", "zeroconf"):
3053
server_settings[option] = bool(server_settings[option])
3054
# Debug implies foreground
3055
if server_settings["debug"]:
3056
server_settings["foreground"] = True
744
3057
# Now we have our good server settings in "server_settings"
745
3058
3059
##################################################################
3060
3061
if (not server_settings["zeroconf"]
3062
and not (server_settings["port"]
3063
or server_settings["socket"] != "")):
3064
parser.error("Needs port or socket to work without Zeroconf")
3065
3066
# For convenience
746
3067
debug = server_settings["debug"]
747
748
if not debug:
749
syslogger.setLevel(logging.WARNING)
750
console.setLevel(logging.WARNING)
751
3068
debuglevel = server_settings["debuglevel"]
3069
use_dbus = server_settings["use_dbus"]
3070
use_ipv6 = server_settings["use_ipv6"]
3071
stored_state_path = os.path.join(server_settings["statedir"],
3072
stored_state_file)
3073
foreground = server_settings["foreground"]
3074
zeroconf = server_settings["zeroconf"]
3075
3076
if debug:
3077
initlogger(debug, logging.DEBUG)
3078
else:
3079
if not debuglevel:
3080
initlogger(debug)
3081
else:
3082
level = getattr(logging, debuglevel.upper())
3083
initlogger(debug, level)
3084
752
3085
if server_settings["servicename"] != "Mandos":
753
syslogger.setFormatter(logging.Formatter\
754
('Mandos (%s): %%(levelname)s:'
755
' %%(message)s'
756
% server_settings["servicename"]))
757
3086
syslogger.setFormatter(
3087
logging.Formatter('Mandos ({}) [%(process)d]:'
3088
' %(levelname)s: %(message)s'.format(
3089
server_settings["servicename"])))
3090
758
3091
# Parse config file with clients
759
client_defaults = { "timeout": "1h",
760
"interval": "5m",
761
"checker": "fping -q -- %(host)s",
762
"host": "",
763
}
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
3092
client_config = configparser.ConfigParser(Client.client_defaults)
765
3093
client_config.read(os.path.join(server_settings["configdir"],
766
3094
"clients.conf"))
767
768
clients = Set()
769
tcp_server = IPv6_TCPServer((server_settings["address"],
770
server_settings["port"]),
771
TCP_handler,
772
settings=server_settings,
773
clients=clients)
774
pidfilename = "/var/run/mandos.pid"
775
try:
776
pidfile = open(pidfilename, "w")
777
except IOError, error:
778
logger.error("Could not open file %r", pidfilename)
779
780
uid = 65534
781
gid = 65534
782
try:
783
uid = pwd.getpwnam("mandos").pw_uid
784
except KeyError:
785
try:
786
uid = pwd.getpwnam("nobody").pw_uid
787
except KeyError:
788
pass
789
try:
790
gid = pwd.getpwnam("mandos").pw_gid
791
except KeyError:
792
try:
793
gid = pwd.getpwnam("nogroup").pw_gid
794
except KeyError:
795
pass
796
try:
3095
3096
global mandos_dbus_service
3097
mandos_dbus_service = None
3098
3099
socketfd = None
3100
if server_settings["socket"] != "":
3101
socketfd = server_settings["socket"]
3102
tcp_server = MandosServer(
3103
(server_settings["address"], server_settings["port"]),
3104
ClientHandler,
3105
interface=(server_settings["interface"] or None),
3106
use_ipv6=use_ipv6,
3107
gnutls_priority=server_settings["priority"],
3108
use_dbus=use_dbus,
3109
socketfd=socketfd)
3110
if not foreground:
3111
pidfilename = "/run/mandos.pid"
3112
if not os.path.isdir("/run/."):
3113
pidfilename = "/var/run/mandos.pid"
3114
pidfile = None
3115
try:
3116
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3117
except IOError as e:
3118
logger.error("Could not open file %r", pidfilename,
3119
exc_info=e)
3120
3121
for name, group in (("_mandos", "_mandos"),
3122
("mandos", "mandos"),
3123
("nobody", "nogroup")):
3124
try:
3125
uid = pwd.getpwnam(name).pw_uid
3126
gid = pwd.getpwnam(group).pw_gid
3127
break
3128
except KeyError:
3129
continue
3130
else:
3131
uid = 65534
3132
gid = 65534
3133
try:
3134
os.setgid(gid)
797
3135
os.setuid(uid)
798
os.setgid(gid)
799
except OSError, error:
800
if error[0] != errno.EPERM:
801
raise error
802
803
global service
804
service = AvahiService(name = server_settings["servicename"],
805
servicetype = "_mandos._tcp", )
806
if server_settings["interface"]:
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
809
3136
if debug:
3137
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3138
gid))
3139
except OSError as error:
3140
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3141
.format(uid, gid, os.strerror(error.errno)))
3142
if error.errno != errno.EPERM:
3143
raise
3144
3145
if debug:
3146
# Enable all possible GnuTLS debugging
3147
3148
# "Use a log level over 10 to enable all debugging options."
3149
# - GnuTLS manual
3150
gnutls.global_set_log_level(11)
3151
3152
@gnutls.log_func
3153
def debug_gnutls(level, string):
3154
logger.debug("GnuTLS: %s", string[:-1])
3155
3156
gnutls.global_set_log_function(debug_gnutls)
3157
3158
# Redirect stdin so all checkers get /dev/null
3159
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3160
os.dup2(null, sys.stdin.fileno())
3161
if null > 2:
3162
os.close(null)
3163
3164
# Need to fork before connecting to D-Bus
3165
if not foreground:
3166
# Close all input and output, do double fork, etc.
3167
daemon()
3168
3169
if gi.version_info < (3, 10, 2):
3170
# multiprocessing will use threads, so before we use GLib we
3171
# need to inform GLib that threads will be used.
3172
GLib.threads_init()
3173
810
3174
global main_loop
811
global bus
812
global server
813
3175
# From the Avahi example code
814
DBusGMainLoop(set_as_default=True )
815
main_loop = gobject.MainLoop()
3176
DBusGMainLoop(set_as_default=True)
3177
main_loop = GLib.MainLoop()
816
3178
bus = dbus.SystemBus()
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
820
3179
# End of Avahi example code
821
822
def remove_from_clients(client):
823
clients.remove(client)
824
if not clients:
825
logger.critical(u"No clients left, exiting")
826
sys.exit()
827
828
clients.update(Set(Client(name = section,
829
stop_hook = remove_from_clients,
830
config
831
= dict(client_config.items(section)))
832
for section in client_config.sections()))
833
if not clients:
834
logger.critical(u"No clients defined")
835
sys.exit(1)
836
837
if debug:
838
# Redirect stdin so all checkers get /dev/null
839
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
840
os.dup2(null, sys.stdin.fileno())
841
if null > 2:
842
os.close(null)
843
else:
844
# No console logging
845
logger.removeHandler(console)
846
# Close all input and output, do double fork, etc.
847
daemon()
848
849
try:
850
pid = os.getpid()
851
pidfile.write(str(pid) + "\n")
852
pidfile.close()
3180
if use_dbus:
3181
try:
3182
bus_name = dbus.service.BusName("se.recompile.Mandos",
3183
bus,
3184
do_not_queue=True)
3185
old_bus_name = dbus.service.BusName(
3186
"se.bsnet.fukt.Mandos", bus,
3187
do_not_queue=True)
3188
except dbus.exceptions.DBusException as e:
3189
logger.error("Disabling D-Bus:", exc_info=e)
3190
use_dbus = False
3191
server_settings["use_dbus"] = False
3192
tcp_server.use_dbus = False
3193
if zeroconf:
3194
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3195
service = AvahiServiceToSyslog(
3196
name=server_settings["servicename"],
3197
servicetype="_mandos._tcp",
3198
protocol=protocol,
3199
bus=bus)
3200
if server_settings["interface"]:
3201
service.interface = if_nametoindex(
3202
server_settings["interface"].encode("utf-8"))
3203
3204
global multiprocessing_manager
3205
multiprocessing_manager = multiprocessing.Manager()
3206
3207
client_class = Client
3208
if use_dbus:
3209
client_class = functools.partial(ClientDBus, bus=bus)
3210
3211
client_settings = Client.config_parser(client_config)
3212
old_client_settings = {}
3213
clients_data = {}
3214
3215
# This is used to redirect stdout and stderr for checker processes
3216
global wnull
3217
wnull = open(os.devnull, "w") # A writable /dev/null
3218
# Only used if server is running in foreground but not in debug
3219
# mode
3220
if debug or not foreground:
3221
wnull.close()
3222
3223
# Get client data and settings from last running state.
3224
if server_settings["restore"]:
3225
try:
3226
with open(stored_state_path, "rb") as stored_state:
3227
if sys.version_info.major == 2:
3228
clients_data, old_client_settings = pickle.load(
3229
stored_state)
3230
else:
3231
bytes_clients_data, bytes_old_client_settings = (
3232
pickle.load(stored_state, encoding="bytes"))
3233
# Fix bytes to strings
3234
# clients_data
3235
# .keys()
3236
clients_data = {(key.decode("utf-8")
3237
if isinstance(key, bytes)
3238
else key): value
3239
for key, value in
3240
bytes_clients_data.items()}
3241
del bytes_clients_data
3242
for key in clients_data:
3243
value = {(k.decode("utf-8")
3244
if isinstance(k, bytes) else k): v
3245
for k, v in
3246
clients_data[key].items()}
3247
clients_data[key] = value
3248
# .client_structure
3249
value["client_structure"] = [
3250
(s.decode("utf-8")
3251
if isinstance(s, bytes)
3252
else s) for s in
3253
value["client_structure"]]
3254
# .name, .host, and .checker_command
3255
for k in ("name", "host", "checker_command"):
3256
if isinstance(value[k], bytes):
3257
value[k] = value[k].decode("utf-8")
3258
if "key_id" not in value:
3259
value["key_id"] = ""
3260
elif "fingerprint" not in value:
3261
value["fingerprint"] = ""
3262
# old_client_settings
3263
# .keys()
3264
old_client_settings = {
3265
(key.decode("utf-8")
3266
if isinstance(key, bytes)
3267
else key): value
3268
for key, value in
3269
bytes_old_client_settings.items()}
3270
del bytes_old_client_settings
3271
# .host and .checker_command
3272
for value in old_client_settings.values():
3273
for attribute in ("host", "checker_command"):
3274
if isinstance(value[attribute], bytes):
3275
value[attribute] = (value[attribute]
3276
.decode("utf-8"))
3277
os.remove(stored_state_path)
3278
except IOError as e:
3279
if e.errno == errno.ENOENT:
3280
logger.warning("Could not load persistent state:"
3281
" {}".format(os.strerror(e.errno)))
3282
else:
3283
logger.critical("Could not load persistent state:",
3284
exc_info=e)
3285
raise
3286
except EOFError as e:
3287
logger.warning("Could not load persistent state: "
3288
"EOFError:",
3289
exc_info=e)
3290
3291
with PGPEngine() as pgp:
3292
for client_name, client in clients_data.items():
3293
# Skip removed clients
3294
if client_name not in client_settings:
3295
continue
3296
3297
# Decide which value to use after restoring saved state.
3298
# We have three different values: Old config file,
3299
# new config file, and saved state.
3300
# New config value takes precedence if it differs from old
3301
# config value, otherwise use saved state.
3302
for name, value in client_settings[client_name].items():
3303
try:
3304
# For each value in new config, check if it
3305
# differs from the old config value (Except for
3306
# the "secret" attribute)
3307
if (name != "secret"
3308
and (value !=
3309
old_client_settings[client_name][name])):
3310
client[name] = value
3311
except KeyError:
3312
pass
3313
3314
# Clients who has passed its expire date can still be
3315
# enabled if its last checker was successful. A Client
3316
# whose checker succeeded before we stored its state is
3317
# assumed to have successfully run all checkers during
3318
# downtime.
3319
if client["enabled"]:
3320
if datetime.datetime.utcnow() >= client["expires"]:
3321
if not client["last_checked_ok"]:
3322
logger.warning(
3323
"disabling client {} - Client never "
3324
"performed a successful checker".format(
3325
client_name))
3326
client["enabled"] = False
3327
elif client["last_checker_status"] != 0:
3328
logger.warning(
3329
"disabling client {} - Client last"
3330
" checker failed with error code"
3331
" {}".format(
3332
client_name,
3333
client["last_checker_status"]))
3334
client["enabled"] = False
3335
else:
3336
client["expires"] = (
3337
datetime.datetime.utcnow()
3338
+ client["timeout"])
3339
logger.debug("Last checker succeeded,"
3340
" keeping {} enabled".format(
3341
client_name))
3342
try:
3343
client["secret"] = pgp.decrypt(
3344
client["encrypted_secret"],
3345
client_settings[client_name]["secret"])
3346
except PGPError:
3347
# If decryption fails, we use secret from new settings
3348
logger.debug("Failed to decrypt {} old secret".format(
3349
client_name))
3350
client["secret"] = (client_settings[client_name]
3351
["secret"])
3352
3353
# Add/remove clients based on new changes made to config
3354
for client_name in (set(old_client_settings)
3355
- set(client_settings)):
3356
del clients_data[client_name]
3357
for client_name in (set(client_settings)
3358
- set(old_client_settings)):
3359
clients_data[client_name] = client_settings[client_name]
3360
3361
# Create all client objects
3362
for client_name, client in clients_data.items():
3363
tcp_server.clients[client_name] = client_class(
3364
name=client_name,
3365
settings=client,
3366
server_settings=server_settings)
3367
3368
if not tcp_server.clients:
3369
logger.warning("No clients defined")
3370
3371
if not foreground:
3372
if pidfile is not None:
3373
pid = os.getpid()
3374
try:
3375
with pidfile:
3376
print(pid, file=pidfile)
3377
except IOError:
3378
logger.error("Could not write to file %r with PID %d",
3379
pidfilename, pid)
853
3380
del pidfile
854
except IOError:
855
logger.error(u"Could not write to file %r with PID %d",
856
pidfilename, pid)
857
except NameError:
858
# "pidfile" was never created
859
pass
860
del pidfilename
861
3381
del pidfilename
3382
3383
for termsig in (signal.SIGHUP, signal.SIGTERM):
3384
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3385
lambda: main_loop.quit() and False)
3386
3387
if use_dbus:
3388
3389
@alternate_dbus_interfaces(
3390
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3391
class MandosDBusService(DBusObjectWithObjectManager):
3392
"""A D-Bus proxy object"""
3393
3394
def __init__(self):
3395
dbus.service.Object.__init__(self, bus, "/")
3396
3397
_interface = "se.recompile.Mandos"
3398
3399
@dbus.service.signal(_interface, signature="o")
3400
def ClientAdded(self, objpath):
3401
"D-Bus signal"
3402
pass
3403
3404
@dbus.service.signal(_interface, signature="ss")
3405
def ClientNotFound(self, key_id, address):
3406
"D-Bus signal"
3407
pass
3408
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3410
"true"})
3411
@dbus.service.signal(_interface, signature="os")
3412
def ClientRemoved(self, objpath, name):
3413
"D-Bus signal"
3414
pass
3415
3416
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3417
"true"})
3418
@dbus.service.method(_interface, out_signature="ao")
3419
def GetAllClients(self):
3420
"D-Bus method"
3421
return dbus.Array(c.dbus_object_path for c in
3422
tcp_server.clients.values())
3423
3424
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3425
"true"})
3426
@dbus.service.method(_interface,
3427
out_signature="a{oa{sv}}")
3428
def GetAllClientsWithProperties(self):
3429
"D-Bus method"
3430
return dbus.Dictionary(
3431
{c.dbus_object_path: c.GetAll(
3432
"se.recompile.Mandos.Client")
3433
for c in tcp_server.clients.values()},
3434
signature="oa{sv}")
3435
3436
@dbus.service.method(_interface, in_signature="o")
3437
def RemoveClient(self, object_path):
3438
"D-Bus method"
3439
for c in tcp_server.clients.values():
3440
if c.dbus_object_path == object_path:
3441
del tcp_server.clients[c.name]
3442
c.remove_from_connection()
3443
# Don't signal the disabling
3444
c.disable(quiet=True)
3445
# Emit D-Bus signal for removal
3446
self.client_removed_signal(c)
3447
return
3448
raise KeyError(object_path)
3449
3450
del _interface
3451
3452
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3453
out_signature="a{oa{sa{sv}}}")
3454
def GetManagedObjects(self):
3455
"""D-Bus method"""
3456
return dbus.Dictionary(
3457
{client.dbus_object_path:
3458
dbus.Dictionary(
3459
{interface: client.GetAll(interface)
3460
for interface in
3461
client._get_all_interface_names()})
3462
for client in tcp_server.clients.values()})
3463
3464
def client_added_signal(self, client):
3465
"""Send the new standard signal and the old signal"""
3466
if use_dbus:
3467
# New standard signal
3468
self.InterfacesAdded(
3469
client.dbus_object_path,
3470
dbus.Dictionary(
3471
{interface: client.GetAll(interface)
3472
for interface in
3473
client._get_all_interface_names()}))
3474
# Old signal
3475
self.ClientAdded(client.dbus_object_path)
3476
3477
def client_removed_signal(self, client):
3478
"""Send the new standard signal and the old signal"""
3479
if use_dbus:
3480
# New standard signal
3481
self.InterfacesRemoved(
3482
client.dbus_object_path,
3483
client._get_all_interface_names())
3484
# Old signal
3485
self.ClientRemoved(client.dbus_object_path,
3486
client.name)
3487
3488
mandos_dbus_service = MandosDBusService()
3489
3490
# Save modules to variables to exempt the modules from being
3491
# unloaded before the function registered with atexit() is run.
3492
mp = multiprocessing
3493
wn = wnull
3494
862
3495
def cleanup():
863
3496
"Cleanup function; run on exit"
864
global group
865
# From the Avahi example code
866
if not group is None:
867
group.Free()
868
group = None
869
# End of Avahi example code
870
871
while clients:
872
client = clients.pop()
873
client.stop_hook = None
874
client.stop()
875
3497
if zeroconf:
3498
service.cleanup()
3499
3500
mp.active_children()
3501
wn.close()
3502
if not (tcp_server.clients or client_settings):
3503
return
3504
3505
# Store client before exiting. Secrets are encrypted with key
3506
# based on what config file has. If config file is
3507
# removed/edited, old secret will thus be unrecovable.
3508
clients = {}
3509
with PGPEngine() as pgp:
3510
for client in tcp_server.clients.values():
3511
key = client_settings[client.name]["secret"]
3512
client.encrypted_secret = pgp.encrypt(client.secret,
3513
key)
3514
client_dict = {}
3515
3516
# A list of attributes that can not be pickled
3517
# + secret.
3518
exclude = {"bus", "changedstate", "secret",
3519
"checker", "server_settings"}
3520
for name, typ in inspect.getmembers(dbus.service
3521
.Object):
3522
exclude.add(name)
3523
3524
client_dict["encrypted_secret"] = (client
3525
.encrypted_secret)
3526
for attr in client.client_structure:
3527
if attr not in exclude:
3528
client_dict[attr] = getattr(client, attr)
3529
3530
clients[client.name] = client_dict
3531
del client_settings[client.name]["secret"]
3532
3533
try:
3534
with tempfile.NamedTemporaryFile(
3535
mode='wb',
3536
suffix=".pickle",
3537
prefix='clients-',
3538
dir=os.path.dirname(stored_state_path),
3539
delete=False) as stored_state:
3540
pickle.dump((clients, client_settings), stored_state,
3541
protocol=2)
3542
tempname = stored_state.name
3543
os.rename(tempname, stored_state_path)
3544
except (IOError, OSError) as e:
3545
if not debug:
3546
try:
3547
os.remove(tempname)
3548
except NameError:
3549
pass
3550
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3551
logger.warning("Could not save persistent state: {}"
3552
.format(os.strerror(e.errno)))
3553
else:
3554
logger.warning("Could not save persistent state:",
3555
exc_info=e)
3556
raise
3557
3558
# Delete all clients, and settings from config
3559
while tcp_server.clients:
3560
name, client = tcp_server.clients.popitem()
3561
if use_dbus:
3562
client.remove_from_connection()
3563
# Don't signal the disabling
3564
client.disable(quiet=True)
3565
# Emit D-Bus signal for removal
3566
if use_dbus:
3567
mandos_dbus_service.client_removed_signal(client)
3568
client_settings.clear()
3569
876
3570
atexit.register(cleanup)
877
878
if not debug:
879
signal.signal(signal.SIGINT, signal.SIG_IGN)
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
882
883
for client in clients:
884
client.start()
885
3571
3572
for client in tcp_server.clients.values():
3573
if use_dbus:
3574
# Emit D-Bus signal for adding
3575
mandos_dbus_service.client_added_signal(client)
3576
# Need to initiate checking of clients
3577
if client.enabled:
3578
client.init_checker()
3579
886
3580
tcp_server.enable()
887
3581
tcp_server.server_activate()
888
3582
889
3583
# Find out what port we got
890
service.port = tcp_server.socket.getsockname()[1]
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
893
894
#service.interface = tcp_server.socket.getsockname()[3]
895
3584
if zeroconf:
3585
service.port = tcp_server.socket.getsockname()[1]
3586
if use_ipv6:
3587
logger.info("Now listening on address %r, port %d,"
3588
" flowinfo %d, scope_id %d",
3589
*tcp_server.socket.getsockname())
3590
else: # IPv4
3591
logger.info("Now listening on address %r, port %d",
3592
*tcp_server.socket.getsockname())
3593
3594
# service.interface = tcp_server.socket.getsockname()[3]
3595
896
3596
try:
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
899
try:
900
server_state_changed(server.GetState())
901
except dbus.exceptions.DBusException, error:
902
logger.critical(u"DBusException: %s", error)
903
sys.exit(1)
904
# End of Avahi example code
905
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
907
lambda *args, **kwargs:
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
910
911
logger.debug(u"Starting main loop")
3597
if zeroconf:
3598
# From the Avahi example code
3599
try:
3600
service.activate()
3601
except dbus.exceptions.DBusException as error:
3602
logger.critical("D-Bus Exception", exc_info=error)
3603
cleanup()
3604
sys.exit(1)
3605
# End of Avahi example code
3606
3607
GLib.io_add_watch(
3608
GLib.IOChannel.unix_new(tcp_server.fileno()),
3609
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3610
lambda *args, **kwargs: (tcp_server.handle_request
3611
(*args[2:], **kwargs) or True))
3612
3613
logger.debug("Starting main loop")
912
3614
main_loop.run()
913
except AvahiError, error:
914
logger.critical(u"AvahiError: %s" + unicode(error))
3615
except AvahiError as error:
3616
logger.critical("Avahi Error", exc_info=error)
3617
cleanup()
915
3618
sys.exit(1)
916
3619
except KeyboardInterrupt:
917
3620
if debug:
918
print
3621
print("", file=sys.stderr)
3622
logger.debug("Server received KeyboardInterrupt")
3623
logger.debug("Server exiting")
3624
# Must run before the D-Bus bus name gets deregistered
3625
cleanup()
3626
3627
3628
def should_only_run_tests():
3629
parser = argparse.ArgumentParser(add_help=False)
3630
parser.add_argument("--check", action='store_true')
3631
args, unknown_args = parser.parse_known_args()
3632
run_tests = args.check
3633
if run_tests:
3634
# Remove --check argument from sys.argv
3635
sys.argv[1:] = unknown_args
3636
return run_tests
3637
3638
# Add all tests from doctest strings
3639
def load_tests(loader, tests, none):
3640
import doctest
3641
tests.addTests(doctest.DocTestSuite())
3642
return tests
919
3643
920
3644
if __name__ == '__main__':
921
main()
3645
try:
3646
if should_only_run_tests():
3647
# Call using ./mandos --check [--verbose]
3648
unittest.main()
3649
else:
3650
main()
3651
finally:
3652
logging.shutdown()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0