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- Committer: Teddy Hogeborn
- Date: 2015-08-10 08:25:01 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 325.
- Revision ID: teddy@recompile.se-20150810082501-rb7w2dre1flqiqe2
Refactor D-Bus annotation class out from D-Bus properties class.
* mandos (DBusObjectWithAnnotations): New; factored out D-Bus
annotations code from
DBusObjectWithProperties class.
(DBusObjectWithProperties): Inherit from DBusObjectWithAnnotations.
(main/MandosDBusService): - '' -
(main/MandosDBusService._foo): Removed interface annotation for
"o.f.D.Property.EmitsChangedSignal";
this object has no properties.
* mandos (DBusObjectWithAnnotations): New; factored out D-Bus
annotations code from
DBusObjectWithProperties class.
(DBusObjectWithProperties): Inherit from DBusObjectWithAnnotations.
(main/MandosDBusService): - '' -
(main/MandosDBusService._foo): Removed interface annotation for
"o.f.D.Property.EmitsChangedSignal";
this object has no properties.
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- ca.pem
- files renamed:
- server.py => mandos
- server.conf => mandos.conf
- plugbasedclient.c => plugin-runner.c
- plugins.d/mandosclient.c => plugins.d/mandos-client.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- files modified:
- Makefile
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
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
# following functions: "AvahiService.add", "AvahiService.remove",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
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
12
#
13
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
15
16
#
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
# GNU General Public License for more details.
25
26
#
26
27
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
35
43
import socket
36
import select
37
from optparse import OptionParser
44
import argparse
38
45
import datetime
39
46
import errno
40
47
import gnutls.crypto
43
50
import gnutls.library.functions
44
51
import gnutls.library.constants
45
52
import gnutls.library.types
46
import ConfigParser
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
47
57
import sys
48
58
import re
49
59
import os
50
60
import signal
51
from sets import Set
52
61
import subprocess
53
62
import atexit
54
63
import stat
55
64
import logging
56
65
import logging.handlers
66
import pwd
67
import contextlib
68
import struct
69
import fcntl
70
import functools
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
75
import multiprocessing
76
import types
77
import binascii
78
import tempfile
79
import itertools
80
import collections
81
import codecs
57
82
58
83
import dbus
59
import gobject
84
import dbus.service
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
60
89
import avahi
61
90
from dbus.mainloop.glib import DBusGMainLoop
62
91
import ctypes
63
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
68
# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
70
# supply an OpenPGP certificate, and the fingerprint of this
71
# certificate is used by this server to look up (in a list read from a
72
# file at start time) which binary blob to give the client. No other
73
# authentication or authorization is done by this server.
74
75
76
logger = logging.Logger('mandos')
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
81
logger.addHandler(syslogger)
82
del syslogger
92
import ctypes.util
93
import xml.dom.minidom
94
import inspect
95
96
try:
97
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
98
except AttributeError:
99
try:
100
from IN import SO_BINDTODEVICE
101
except ImportError:
102
SO_BINDTODEVICE = None
103
104
if sys.version_info.major == 2:
105
str = unicode
106
107
version = "1.6.9"
108
stored_state_file = "clients.pickle"
109
110
logger = logging.getLogger()
111
syslogger = None
112
113
try:
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
116
except (OSError, AttributeError):
117
118
def if_nametoindex(interface):
119
"Get an interface index the hard way, i.e. using fcntl()"
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
121
with contextlib.closing(socket.socket()) as s:
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
125
return interface_index
126
127
128
def initlogger(debug, level=logging.WARNING):
129
"""init logger and add loglevel"""
130
131
global syslogger
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
135
syslogger.setFormatter(logging.Formatter
136
('Mandos [%(process)d]: %(levelname)s:'
137
' %(message)s'))
138
logger.addHandler(syslogger)
139
140
if debug:
141
console = logging.StreamHandler()
142
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
143
' [%(process)d]:'
144
' %(levelname)s:'
145
' %(message)s'))
146
logger.addHandler(console)
147
logger.setLevel(level)
148
149
150
class PGPError(Exception):
151
"""Exception if encryption/decryption fails"""
152
pass
153
154
155
class PGPEngine(object):
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
158
def __init__(self):
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
162
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
165
166
def __enter__(self):
167
return self
168
169
def __exit__(self, exc_type, exc_value, traceback):
170
self._cleanup()
171
return False
172
173
def __del__(self):
174
self._cleanup()
175
176
def _cleanup(self):
177
if self.tempdir is not None:
178
# Delete contents of tempdir
179
for root, dirs, files in os.walk(self.tempdir,
180
topdown = False):
181
for filename in files:
182
os.remove(os.path.join(root, filename))
183
for dirname in dirs:
184
os.rmdir(os.path.join(root, dirname))
185
# Remove tempdir
186
os.rmdir(self.tempdir)
187
self.tempdir = None
188
189
def password_encode(self, password):
190
# Passphrase can not be empty and can not contain newlines or
191
# NUL bytes. So we prefix it and hex encode it.
192
encoded = b"mandos" + binascii.hexlify(password)
193
if len(encoded) > 2048:
194
# GnuPG can't handle long passwords, so encode differently
195
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
196
.replace(b"\n", b"\\n")
197
.replace(b"\0", b"\\x00"))
198
return encoded
199
200
def encrypt(self, data, password):
201
passphrase = self.password_encode(password)
202
with tempfile.NamedTemporaryFile(
203
dir=self.tempdir) as passfile:
204
passfile.write(passphrase)
205
passfile.flush()
206
proc = subprocess.Popen(['gpg', '--symmetric',
207
'--passphrase-file',
208
passfile.name]
209
+ self.gnupgargs,
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
214
if proc.returncode != 0:
215
raise PGPError(err)
216
return ciphertext
217
218
def decrypt(self, data, password):
219
passphrase = self.password_encode(password)
220
with tempfile.NamedTemporaryFile(
221
dir = self.tempdir) as passfile:
222
passfile.write(passphrase)
223
passfile.flush()
224
proc = subprocess.Popen(['gpg', '--decrypt',
225
'--passphrase-file',
226
passfile.name]
227
+ self.gnupgargs,
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
232
if proc.returncode != 0:
233
raise PGPError(err)
234
return decrypted_plaintext
83
235
84
236
85
237
class AvahiError(Exception):
86
def __init__(self, value):
238
def __init__(self, value, *args, **kwargs):
87
239
self.value = value
88
def __str__(self):
89
return repr(self.value)
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
90
243
91
244
class AvahiServiceError(AvahiError):
92
245
pass
93
246
247
94
248
class AvahiGroupError(AvahiError):
95
249
pass
96
250
97
251
98
252
class AvahiService(object):
99
"""
253
"""An Avahi (Zeroconf) service.
254
255
Attributes:
100
256
interface: integer; avahi.IF_UNSPEC or an interface index.
101
257
Used to optionally bind to the specified interface.
102
name = string; Example: "Mandos"
103
type = string; Example: "_mandos._tcp".
104
See <http://www.dns-sd.org/ServiceTypes.html>
105
port = integer; what port to announce
106
TXT = list of strings; TXT record for the service
107
domain = string; Domain to publish on, default to .local if empty.
108
host = string; Host to publish records for, default to localhost
109
if empty.
110
max_renames = integer; maximum number of renames
111
rename_count = integer; counter so we only rename after collisions
112
a sensible number of times
258
name: string; Example: 'Mandos'
259
type: string; Example: '_mandos._tcp'.
260
See <https://www.iana.org/assignments/service-names-port-numbers>
261
port: integer; what port to announce
262
TXT: list of strings; TXT record for the service
263
domain: string; Domain to publish on, default to .local if empty.
264
host: string; Host to publish records for, default is localhost
265
max_renames: integer; maximum number of renames
266
rename_count: integer; counter so we only rename after collisions
267
a sensible number of times
268
group: D-Bus Entry Group
269
server: D-Bus Server
270
bus: dbus.SystemBus()
113
271
"""
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
117
"""An Avahi (Zeroconf) service. """
272
273
def __init__(self,
274
interface = avahi.IF_UNSPEC,
275
name = None,
276
servicetype = None,
277
port = None,
278
TXT = None,
279
domain = "",
280
host = "",
281
max_renames = 32768,
282
protocol = avahi.PROTO_UNSPEC,
283
bus = None):
118
284
self.interface = interface
119
285
self.name = name
120
self.type = type
286
self.type = servicetype
121
287
self.port = port
122
if TXT is None:
123
self.TXT = []
124
else:
125
self.TXT = TXT
288
self.TXT = TXT if TXT is not None else []
126
289
self.domain = domain
127
290
self.host = host
128
291
self.rename_count = 0
129
def rename(self):
292
self.max_renames = max_renames
293
self.protocol = protocol
294
self.group = None # our entry group
295
self.server = None
296
self.bus = bus
297
self.entry_group_state_changed_match = None
298
299
def rename(self, remove=True):
130
300
"""Derived from the Avahi example code"""
131
301
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
302
logger.critical("No suitable Zeroconf service name found"
303
" after %i retries, exiting.",
304
self.rename_count)
134
305
raise AvahiServiceError("Too many renames")
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", name)
137
self.remove()
138
self.add()
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
139
308
self.rename_count += 1
309
logger.info("Changing Zeroconf service name to %r ...",
310
self.name)
311
if remove:
312
self.remove()
313
try:
314
self.add()
315
except dbus.exceptions.DBusException as error:
316
if (error.get_dbus_name()
317
== "org.freedesktop.Avahi.CollisionError"):
318
logger.info("Local Zeroconf service name collision.")
319
return self.rename(remove=False)
320
else:
321
logger.critical("D-Bus Exception", exc_info=error)
322
self.cleanup()
323
os._exit(1)
324
140
325
def remove(self):
141
326
"""Derived from the Avahi example code"""
142
if group is not None:
143
group.Reset()
327
if self.entry_group_state_changed_match is not None:
328
self.entry_group_state_changed_match.remove()
329
self.entry_group_state_changed_match = None
330
if self.group is not None:
331
self.group.Reset()
332
144
333
def add(self):
145
334
"""Derived from the Avahi example code"""
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
169
335
self.remove()
336
if self.group is None:
337
self.group = dbus.Interface(
338
self.bus.get_object(avahi.DBUS_NAME,
339
self.server.EntryGroupNew()),
340
avahi.DBUS_INTERFACE_ENTRY_GROUP)
341
self.entry_group_state_changed_match = (
342
self.group.connect_to_signal(
343
'StateChanged', self.entry_group_state_changed))
344
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
345
self.name, self.type)
346
self.group.AddService(
347
self.interface,
348
self.protocol,
349
dbus.UInt32(0), # flags
350
self.name, self.type,
351
self.domain, self.host,
352
dbus.UInt16(self.port),
353
avahi.string_array_to_txt_array(self.TXT))
354
self.group.Commit()
355
356
def entry_group_state_changed(self, state, error):
357
"""Derived from the Avahi example code"""
358
logger.debug("Avahi entry group state change: %i", state)
359
360
if state == avahi.ENTRY_GROUP_ESTABLISHED:
361
logger.debug("Zeroconf service established.")
362
elif state == avahi.ENTRY_GROUP_COLLISION:
363
logger.info("Zeroconf service name collision.")
364
self.rename()
365
elif state == avahi.ENTRY_GROUP_FAILURE:
366
logger.critical("Avahi: Error in group state changed %s",
367
str(error))
368
raise AvahiGroupError("State changed: {!s}".format(error))
369
370
def cleanup(self):
371
"""Derived from the Avahi example code"""
372
if self.group is not None:
373
try:
374
self.group.Free()
375
except (dbus.exceptions.UnknownMethodException,
376
dbus.exceptions.DBusException):
377
pass
378
self.group = None
379
self.remove()
380
381
def server_state_changed(self, state, error=None):
382
"""Derived from the Avahi example code"""
383
logger.debug("Avahi server state change: %i", state)
384
bad_states = {
385
avahi.SERVER_INVALID: "Zeroconf server invalid",
386
avahi.SERVER_REGISTERING: None,
387
avahi.SERVER_COLLISION: "Zeroconf server name collision",
388
avahi.SERVER_FAILURE: "Zeroconf server failure",
389
}
390
if state in bad_states:
391
if bad_states[state] is not None:
392
if error is None:
393
logger.error(bad_states[state])
394
else:
395
logger.error(bad_states[state] + ": %r", error)
396
self.cleanup()
397
elif state == avahi.SERVER_RUNNING:
398
try:
399
self.add()
400
except dbus.exceptions.DBusException as error:
401
if (error.get_dbus_name()
402
== "org.freedesktop.Avahi.CollisionError"):
403
logger.info("Local Zeroconf service name"
404
" collision.")
405
return self.rename(remove=False)
406
else:
407
logger.critical("D-Bus Exception", exc_info=error)
408
self.cleanup()
409
os._exit(1)
410
else:
411
if error is None:
412
logger.debug("Unknown state: %r", state)
413
else:
414
logger.debug("Unknown state: %r: %r", state, error)
415
416
def activate(self):
417
"""Derived from the Avahi example code"""
418
if self.server is None:
419
self.server = dbus.Interface(
420
self.bus.get_object(avahi.DBUS_NAME,
421
avahi.DBUS_PATH_SERVER,
422
follow_name_owner_changes=True),
423
avahi.DBUS_INTERFACE_SERVER)
424
self.server.connect_to_signal("StateChanged",
425
self.server_state_changed)
426
self.server_state_changed(self.server.GetState())
427
428
429
class AvahiServiceToSyslog(AvahiService):
430
def rename(self, *args, **kwargs):
431
"""Add the new name to the syslog messages"""
432
ret = AvahiService.rename(self, *args, **kwargs)
433
syslogger.setFormatter(logging.Formatter(
434
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
435
.format(self.name)))
436
return ret
437
438
def call_pipe(connection, # : multiprocessing.Connection
439
func, *args, **kwargs):
440
"""This function is meant to be called by multiprocessing.Process
441
442
This function runs func(*args, **kwargs), and writes the resulting
443
return value on the provided multiprocessing.Connection.
444
"""
445
connection.send(func(*args, **kwargs))
446
connection.close()
170
447
171
448
class Client(object):
172
449
"""A representation of a client host served by this server.
450
173
451
Attributes:
174
name: string; from the config file, used in log messages
452
approved: bool(); 'None' if not yet approved/disapproved
453
approval_delay: datetime.timedelta(); Time to wait for approval
454
approval_duration: datetime.timedelta(); Duration of one approval
455
checker: subprocess.Popen(); a running checker process used
456
to see if the client lives.
457
'None' if no process is running.
458
checker_callback_tag: a gobject event source tag, or None
459
checker_command: string; External command which is run to check
460
if client lives. %() expansions are done at
461
runtime with vars(self) as dict, so that for
462
instance %(name)s can be used in the command.
463
checker_initiator_tag: a gobject event source tag, or None
464
created: datetime.datetime(); (UTC) object creation
465
client_structure: Object describing what attributes a client has
466
and is used for storing the client at exit
467
current_checker_command: string; current running checker_command
468
disable_initiator_tag: a gobject event source tag, or None
469
enabled: bool()
175
470
fingerprint: string (40 or 32 hexadecimal digits); used to
176
471
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
fqdn: string (FQDN); available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
190
checker_callback_tag: - '' -
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
193
runtime with vars(self) as dict, so that for
194
instance %(name)s can be used in the command.
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
472
host: string; available for use by the checker command
473
interval: datetime.timedelta(); How often to start a new checker
474
last_approval_request: datetime.datetime(); (UTC) or None
475
last_checked_ok: datetime.datetime(); (UTC) or None
476
last_checker_status: integer between 0 and 255 reflecting exit
477
status of last checker. -1 reflects crashed
478
checker, -2 means no checker completed yet.
479
last_checker_signal: The signal which killed the last checker, if
480
last_checker_status is -1
481
last_enabled: datetime.datetime(); (UTC) or None
482
name: string; from the config file, used in log messages and
483
D-Bus identifiers
484
secret: bytestring; sent verbatim (over TLS) to client
485
timeout: datetime.timedelta(); How long from last_checked_ok
486
until this client is disabled
487
extended_timeout: extra long timeout when secret has been sent
488
runtime_expansions: Allowed attributes for runtime expansion.
489
expires: datetime.datetime(); time (UTC) when a client will be
490
disabled, or None
491
server_settings: The server_settings dict from main()
200
492
"""
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
493
494
runtime_expansions = ("approval_delay", "approval_duration",
495
"created", "enabled", "expires",
496
"fingerprint", "host", "interval",
497
"last_approval_request", "last_checked_ok",
498
"last_enabled", "name", "timeout")
499
client_defaults = {
500
"timeout": "PT5M",
501
"extended_timeout": "PT15M",
502
"interval": "PT2M",
503
"checker": "fping -q -- %%(host)s",
504
"host": "",
505
"approval_delay": "PT0S",
506
"approval_duration": "PT1S",
507
"approved_by_default": "True",
508
"enabled": "True",
509
}
510
511
@staticmethod
512
def config_parser(config):
513
"""Construct a new dict of client settings of this form:
514
{ client_name: {setting_name: value, ...}, ...}
515
with exceptions for any special settings as defined above.
516
NOTE: Must be a pure function. Must return the same result
517
value given the same arguments.
518
"""
519
settings = {}
520
for client_name in config.sections():
521
section = dict(config.items(client_name))
522
client = settings[client_name] = {}
523
524
client["host"] = section["host"]
525
# Reformat values from string types to Python types
526
client["approved_by_default"] = config.getboolean(
527
client_name, "approved_by_default")
528
client["enabled"] = config.getboolean(client_name,
529
"enabled")
530
531
# Uppercase and remove spaces from fingerprint for later
532
# comparison purposes with return value from the
533
# fingerprint() function
534
client["fingerprint"] = (section["fingerprint"].upper()
535
.replace(" ", ""))
536
if "secret" in section:
537
client["secret"] = section["secret"].decode("base64")
538
elif "secfile" in section:
539
with open(os.path.expanduser(os.path.expandvars
540
(section["secfile"])),
541
"rb") as secfile:
542
client["secret"] = secfile.read()
543
else:
544
raise TypeError("No secret or secfile for section {}"
545
.format(section))
546
client["timeout"] = string_to_delta(section["timeout"])
547
client["extended_timeout"] = string_to_delta(
548
section["extended_timeout"])
549
client["interval"] = string_to_delta(section["interval"])
550
client["approval_delay"] = string_to_delta(
551
section["approval_delay"])
552
client["approval_duration"] = string_to_delta(
553
section["approval_duration"])
554
client["checker_command"] = section["checker"]
555
client["last_approval_request"] = None
556
client["last_checked_ok"] = None
557
client["last_checker_status"] = -2
558
559
return settings
560
561
def __init__(self, settings, name = None, server_settings=None):
229
562
self.name = name
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint
232
# for later comparison purposes with return value of
233
# the fingerprint() function
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if secret:
237
self.secret = secret.decode(u"base64")
238
elif secfile:
239
sf = open(secfile)
240
self.secret = sf.read()
241
sf.close()
563
if server_settings is None:
564
server_settings = {}
565
self.server_settings = server_settings
566
# adding all client settings
567
for setting, value in settings.items():
568
setattr(self, setting, value)
569
570
if self.enabled:
571
if not hasattr(self, "last_enabled"):
572
self.last_enabled = datetime.datetime.utcnow()
573
if not hasattr(self, "expires"):
574
self.expires = (datetime.datetime.utcnow()
575
+ self.timeout)
242
576
else:
243
raise TypeError(u"No secret or secfile for client %s"
244
% self.name)
245
self.fqdn = fqdn
246
self.created = datetime.datetime.now()
247
self.last_checked_ok = None
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
250
self.stop_hook = stop_hook
577
self.last_enabled = None
578
self.expires = None
579
580
logger.debug("Creating client %r", self.name)
581
logger.debug(" Fingerprint: %s", self.fingerprint)
582
self.created = settings.get("created",
583
datetime.datetime.utcnow())
584
585
# attributes specific for this server instance
251
586
self.checker = None
252
587
self.checker_initiator_tag = None
253
self.stop_initiator_tag = None
588
self.disable_initiator_tag = None
254
589
self.checker_callback_tag = None
255
self.check_command = checker
256
def start(self):
590
self.current_checker_command = None
591
self.approved = None
592
self.approvals_pending = 0
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
597
if not attr.startswith("_")]
598
self.client_structure.append("client_structure")
599
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
602
if not name.startswith("_"):
603
self.client_structure.append(name)
604
605
# Send notice to process children that client state has changed
606
def send_changedstate(self):
607
with self.changedstate:
608
self.changedstate.notify_all()
609
610
def enable(self):
257
611
"""Start this client's checker and timeout hooks"""
612
if getattr(self, "enabled", False):
613
# Already enabled
614
return
615
self.expires = datetime.datetime.utcnow() + self.timeout
616
self.enabled = True
617
self.last_enabled = datetime.datetime.utcnow()
618
self.init_checker()
619
self.send_changedstate()
620
621
def disable(self, quiet=True):
622
"""Disable this client."""
623
if not getattr(self, "enabled", False):
624
return False
625
if not quiet:
626
logger.info("Disabling client %s", self.name)
627
if getattr(self, "disable_initiator_tag", None) is not None:
628
gobject.source_remove(self.disable_initiator_tag)
629
self.disable_initiator_tag = None
630
self.expires = None
631
if getattr(self, "checker_initiator_tag", None) is not None:
632
gobject.source_remove(self.checker_initiator_tag)
633
self.checker_initiator_tag = None
634
self.stop_checker()
635
self.enabled = False
636
if not quiet:
637
self.send_changedstate()
638
# Do not run this again if called by a gobject.timeout_add
639
return False
640
641
def __del__(self):
642
self.disable()
643
644
def init_checker(self):
258
645
# Schedule a new checker to be started an 'interval' from now,
259
646
# and every interval from then on.
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
647
if self.checker_initiator_tag is not None:
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
650
int(self.interval.total_seconds() * 1000),
651
self.start_checker)
652
# Schedule a disable() when 'timeout' has passed
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
656
int(self.timeout.total_seconds() * 1000), self.disable)
263
657
# Also start a new checker *right now*.
264
658
self.start_checker()
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if self.secret:
275
logger.debug(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
278
return False
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
283
gobject.source_remove(self.checker_initiator_tag)
284
self.checker_initiator_tag = None
285
self.stop_checker()
286
if self.stop_hook:
287
self.stop_hook(self)
288
# Do not run this again if called by a gobject.timeout_add
289
return False
290
def __del__(self):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
659
660
def checker_callback(self, source, condition, connection,
661
command):
294
662
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
296
663
self.checker_callback_tag = None
297
664
self.checker = None
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.debug(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
308
logger.warning(u"Checker for %(name)s crashed?",
665
# Read return code from connection (see call_pipe)
666
returncode = connection.recv()
667
connection.close()
668
669
if returncode >= 0:
670
self.last_checker_status = returncode
671
self.last_checker_signal = None
672
if self.last_checker_status == 0:
673
logger.info("Checker for %(name)s succeeded",
674
vars(self))
675
self.checked_ok()
676
else:
677
logger.info("Checker for %(name)s failed", vars(self))
678
else:
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
681
logger.warning("Checker for %(name)s crashed?",
309
682
vars(self))
310
else:
311
logger.debug(u"Checker for %(name)s failed",
312
vars(self))
683
return False
684
685
def checked_ok(self):
686
"""Assert that the client has been seen, alive and well."""
687
self.last_checked_ok = datetime.datetime.utcnow()
688
self.last_checker_status = 0
689
self.last_checker_signal = None
690
self.bump_timeout()
691
692
def bump_timeout(self, timeout=None):
693
"""Bump up the timeout for this client."""
694
if timeout is None:
695
timeout = self.timeout
696
if self.disable_initiator_tag is not None:
697
gobject.source_remove(self.disable_initiator_tag)
698
self.disable_initiator_tag = None
699
if getattr(self, "enabled", False):
700
self.disable_initiator_tag = gobject.timeout_add(
701
int(timeout.total_seconds() * 1000), self.disable)
702
self.expires = datetime.datetime.utcnow() + timeout
703
704
def need_approval(self):
705
self.last_approval_request = datetime.datetime.utcnow()
706
313
707
def start_checker(self):
314
708
"""Start a new checker subprocess if one is not running.
709
315
710
If a checker already exists, leave it running and do
316
711
nothing."""
317
712
# The reason for not killing a running checker is that if we
318
# did that, then if a checker (for some reason) started
319
# running slowly and taking more than 'interval' time, the
320
# client would inevitably timeout, since no checker would get
321
# a chance to run to completion. If we instead leave running
713
# did that, and if a checker (for some reason) started running
714
# slowly and taking more than 'interval' time, then the client
715
# would inevitably timeout, since no checker would get a
716
# chance to run to completion. If we instead leave running
322
717
# checkers alone, the checker would have to take more time
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
718
# than 'timeout' for the client to be disabled, which is as it
719
# should be.
720
721
if self.checker is not None and not self.checker.is_alive():
722
logger.warning("Checker was not alive; joining")
723
self.checker.join()
724
self.checker = None
725
# Start a new checker if needed
325
726
if self.checker is None:
326
try:
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.fqdn
329
except TypeError:
330
# Escape attributes for the shell
331
escaped_attrs = dict((key, re.escape(str(val)))
332
for key, val in
333
vars(self).iteritems())
334
try:
335
command = self.check_command % escaped_attrs
336
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
339
return True # Try again later
340
try:
341
logger.debug(u"Starting checker %r for %s",
342
command, self.name)
343
self.checker = subprocess.Popen(command,
344
close_fds=True,
345
shell=True, cwd="/")
346
self.checker_callback_tag = gobject.child_watch_add\
347
(self.checker.pid,
348
self.checker_callback)
349
except subprocess.OSError, error:
350
logger.error(u"Failed to start subprocess: %s",
351
error)
727
# Escape attributes for the shell
728
escaped_attrs = {
729
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
731
try:
732
command = self.checker_command % escaped_attrs
733
except TypeError as error:
734
logger.error('Could not format string "%s"',
735
self.checker_command,
736
exc_info=error)
737
return True # Try again later
738
self.current_checker_command = command
739
logger.info("Starting checker %r for %s", command,
740
self.name)
741
# We don't need to redirect stdout and stderr, since
742
# in normal mode, that is already done by daemon(),
743
# and in debug mode we don't want to. (Stdin is
744
# always replaced by /dev/null.)
745
# The exception is when not debugging but nevertheless
746
# running in the foreground; use the previously
747
# created wnull.
748
popen_args = { "close_fds": True,
749
"shell": True,
750
"cwd": "/" }
751
if (not self.server_settings["debug"]
752
and self.server_settings["foreground"]):
753
popen_args.update({"stdout": wnull,
754
"stderr": wnull })
755
pipe = multiprocessing.Pipe(duplex = False)
756
self.checker = multiprocessing.Process(
757
target = call_pipe,
758
args = (pipe[1], subprocess.call, command),
759
kwargs = popen_args)
760
self.checker.start()
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
763
self.checker_callback, pipe[0], command)
352
764
# Re-run this periodically if run by gobject.timeout_add
353
765
return True
766
354
767
def stop_checker(self):
355
768
"""Force the checker process, if any, to stop."""
356
769
if self.checker_callback_tag:
359
772
if getattr(self, "checker", None) is None:
360
773
return
361
774
logger.debug("Stopping checker for %(name)s", vars(self))
362
try:
363
os.kill(self.checker.pid, signal.SIGTERM)
364
#os.sleep(0.5)
365
#if self.checker.poll() is None:
366
# os.kill(self.checker.pid, signal.SIGKILL)
367
except OSError, error:
368
if error.errno != errno.ESRCH: # No such process
369
raise
775
self.checker.terminate()
370
776
self.checker = None
371
def still_valid(self):
372
"""Has the timeout not yet passed for this client?"""
373
now = datetime.datetime.now()
374
if self.last_checked_ok is None:
375
return now < (self.created + self.timeout)
376
else:
377
return now < (self.last_checked_ok + self.timeout)
378
379
380
def peer_certificate(session):
381
"Return the peer's OpenPGP certificate as a bytestring"
382
# If not an OpenPGP certificate...
383
if gnutls.library.functions.gnutls_certificate_type_get\
384
(session._c_object) \
385
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
386
# ...do the normal thing
387
return session.peer_certificate
388
list_size = ctypes.c_uint()
389
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
390
(session._c_object, ctypes.byref(list_size))
391
if list_size.value == 0:
392
return None
393
cert = cert_list[0]
394
return ctypes.string_at(cert.data, cert.size)
395
396
397
def fingerprint(openpgp):
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
399
# New empty GnuTLS certificate
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
401
gnutls.library.functions.gnutls_openpgp_crt_init\
402
(ctypes.byref(crt))
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# Import the OpenPGP public key into the certificate
409
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
410
(crt,
411
ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# New buffer for the fingerprint
414
buffer = ctypes.create_string_buffer(20)
415
buffer_length = ctypes.c_size_t()
416
# Get the fingerprint from the certificate into the buffer
417
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
418
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
419
# Deinit the certificate
420
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
421
# Convert the buffer to a Python bytestring
422
fpr = ctypes.string_at(buffer, buffer_length.value)
423
# Convert the bytestring to hexadecimal notation
424
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
425
return hex_fpr
426
427
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
429
"""A TCP request handler class.
430
Instantiated by IPv6_TCPServer for each request to handle it.
777
778
779
def dbus_service_property(dbus_interface,
780
signature="v",
781
access="readwrite",
782
byte_arrays=False):
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
become properties on the D-Bus.
785
786
The decorated method will be called with no arguments by "Get"
787
and with one argument by "Set".
788
789
The parameters, where they are supported, are the same as
790
dbus.service.method, except there is only "signature", since the
791
type from Get() and the type sent to Set() is the same.
792
"""
793
# Encoding deeply encoded byte arrays is not supported yet by the
794
# "Set" method, so we fail early here:
795
if byte_arrays and signature != "ay":
796
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {!r}".format(signature))
798
799
def decorator(func):
800
func._dbus_is_property = True
801
func._dbus_interface = dbus_interface
802
func._dbus_signature = signature
803
func._dbus_access = access
804
func._dbus_name = func.__name__
805
if func._dbus_name.endswith("_dbus_property"):
806
func._dbus_name = func._dbus_name[:-14]
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
808
return func
809
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
831
return decorator
832
833
834
def dbus_annotations(annotations):
835
"""Decorator to annotate D-Bus methods, signals or properties
836
Usage:
837
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
@dbus_service_property("org.example.Interface", signature="b",
842
access="r")
843
def Property_dbus_property(self):
844
return dbus.Boolean(False)
845
846
See also the DBusObjectWithAnnotations class.
847
"""
848
849
def decorator(func):
850
func._dbus_annotations = annotations
851
return func
852
853
return decorator
854
855
856
class DBusPropertyException(dbus.exceptions.DBusException):
857
"""A base class for D-Bus property-related exceptions
858
"""
859
pass
860
861
862
class DBusPropertyAccessException(DBusPropertyException):
863
"""A property's access permissions disallows an operation.
864
"""
865
pass
866
867
868
class DBusPropertyNotFound(DBusPropertyException):
869
"""An attempt was made to access a non-existing property.
870
"""
871
pass
872
873
874
class DBusObjectWithAnnotations(dbus.service.Object):
875
"""A D-Bus object with annotations.
876
877
Classes inheriting from this can use the dbus_annotations
878
decorator to add annotations to methods or signals.
879
"""
880
881
@staticmethod
882
def _is_dbus_thing(thing):
883
"""Returns a function testing if an attribute is a D-Bus thing
884
885
If called like _is_dbus_thing("method") it returns a function
886
suitable for use as predicate to inspect.getmembers().
887
"""
888
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
889
False)
890
891
def _get_all_dbus_things(self, thing):
892
"""Returns a generator of (name, attribute) pairs
893
"""
894
return ((getattr(athing.__get__(self), "_dbus_name", name),
895
athing.__get__(self))
896
for cls in self.__class__.__mro__
897
for name, athing in
898
inspect.getmembers(cls, self._is_dbus_thing(thing)))
899
900
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
901
out_signature = "s",
902
path_keyword = 'object_path',
903
connection_keyword = 'connection')
904
def Introspect(self, object_path, connection):
905
"""Overloading of standard D-Bus method.
906
907
Inserts annotation tags on methods and signals.
908
"""
909
xmlstring = dbus.service.Object.Introspect(self, object_path,
910
connection)
911
try:
912
document = xml.dom.minidom.parseString(xmlstring)
913
914
for if_tag in document.getElementsByTagName("interface"):
915
# Add annotation tags
916
for typ in ("method", "signal"):
917
for tag in if_tag.getElementsByTagName(typ):
918
annots = dict()
919
for name, prop in (self.
920
_get_all_dbus_things(typ)):
921
if (name == tag.getAttribute("name")
922
and prop._dbus_interface
923
== if_tag.getAttribute("name")):
924
annots.update(getattr(
925
prop, "_dbus_annotations", {}))
926
for name, value in annots.items():
927
ann_tag = document.createElement(
928
"annotation")
929
ann_tag.setAttribute("name", name)
930
ann_tag.setAttribute("value", value)
931
tag.appendChild(ann_tag)
932
# Add interface annotation tags
933
for annotation, value in dict(
934
itertools.chain.from_iterable(
935
annotations().items()
936
for name, annotations
937
in self._get_all_dbus_things("interface")
938
if name == if_tag.getAttribute("name")
939
)).items():
940
ann_tag = document.createElement("annotation")
941
ann_tag.setAttribute("name", annotation)
942
ann_tag.setAttribute("value", value)
943
if_tag.appendChild(ann_tag)
944
# Fix argument name for the Introspect method itself
945
if (if_tag.getAttribute("name")
946
== dbus.INTROSPECTABLE_IFACE):
947
for cn in if_tag.getElementsByTagName("method"):
948
if cn.getAttribute("name") == "Introspect":
949
for arg in cn.getElementsByTagName("arg"):
950
if (arg.getAttribute("direction")
951
== "out"):
952
arg.setAttribute("name",
953
"xml_data")
954
xmlstring = document.toxml("utf-8")
955
document.unlink()
956
except (AttributeError, xml.dom.DOMException,
957
xml.parsers.expat.ExpatError) as error:
958
logger.error("Failed to override Introspection method",
959
exc_info=error)
960
return xmlstring
961
962
963
class DBusObjectWithProperties(DBusObjectWithAnnotations):
964
"""A D-Bus object with properties.
965
966
Classes inheriting from this can use the dbus_service_property
967
decorator to expose methods as D-Bus properties. It exposes the
968
standard Get(), Set(), and GetAll() methods on the D-Bus.
969
"""
970
971
def _get_dbus_property(self, interface_name, property_name):
972
"""Returns a bound method if one exists which is a D-Bus
973
property with the specified name and interface.
974
"""
975
for cls in self.__class__.__mro__:
976
for name, value in inspect.getmembers(
977
cls, self._is_dbus_thing("property")):
978
if (value._dbus_name == property_name
979
and value._dbus_interface == interface_name):
980
return value.__get__(self)
981
982
# No such property
983
raise DBusPropertyNotFound("{}:{}.{}".format(
984
self.dbus_object_path, interface_name, property_name))
985
986
@dbus.service.method(dbus.PROPERTIES_IFACE,
987
in_signature="ss",
988
out_signature="v")
989
def Get(self, interface_name, property_name):
990
"""Standard D-Bus property Get() method, see D-Bus standard.
991
"""
992
prop = self._get_dbus_property(interface_name, property_name)
993
if prop._dbus_access == "write":
994
raise DBusPropertyAccessException(property_name)
995
value = prop()
996
if not hasattr(value, "variant_level"):
997
return value
998
return type(value)(value, variant_level=value.variant_level+1)
999
1000
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1001
def Set(self, interface_name, property_name, value):
1002
"""Standard D-Bus property Set() method, see D-Bus standard.
1003
"""
1004
prop = self._get_dbus_property(interface_name, property_name)
1005
if prop._dbus_access == "read":
1006
raise DBusPropertyAccessException(property_name)
1007
if prop._dbus_get_args_options["byte_arrays"]:
1008
# The byte_arrays option is not supported yet on
1009
# signatures other than "ay".
1010
if prop._dbus_signature != "ay":
1011
raise ValueError("Byte arrays not supported for non-"
1012
"'ay' signature {!r}"
1013
.format(prop._dbus_signature))
1014
value = dbus.ByteArray(b''.join(chr(byte)
1015
for byte in value))
1016
prop(value)
1017
1018
@dbus.service.method(dbus.PROPERTIES_IFACE,
1019
in_signature="s",
1020
out_signature="a{sv}")
1021
def GetAll(self, interface_name):
1022
"""Standard D-Bus property GetAll() method, see D-Bus
1023
standard.
1024
1025
Note: Will not include properties with access="write".
1026
"""
1027
properties = {}
1028
for name, prop in self._get_all_dbus_things("property"):
1029
if (interface_name
1030
and interface_name != prop._dbus_interface):
1031
# Interface non-empty but did not match
1032
continue
1033
# Ignore write-only properties
1034
if prop._dbus_access == "write":
1035
continue
1036
value = prop()
1037
if not hasattr(value, "variant_level"):
1038
properties[name] = value
1039
continue
1040
properties[name] = type(value)(
1041
value, variant_level = value.variant_level + 1)
1042
return dbus.Dictionary(properties, signature="sv")
1043
1044
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1045
def PropertiesChanged(self, interface_name, changed_properties,
1046
invalidated_properties):
1047
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1048
standard.
1049
"""
1050
pass
1051
1052
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1053
out_signature="s",
1054
path_keyword='object_path',
1055
connection_keyword='connection')
1056
def Introspect(self, object_path, connection):
1057
"""Overloading of standard D-Bus method.
1058
1059
Inserts property tags and interface annotation tags.
1060
"""
1061
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1062
object_path,
1063
connection)
1064
try:
1065
document = xml.dom.minidom.parseString(xmlstring)
1066
1067
def make_tag(document, name, prop):
1068
e = document.createElement("property")
1069
e.setAttribute("name", name)
1070
e.setAttribute("type", prop._dbus_signature)
1071
e.setAttribute("access", prop._dbus_access)
1072
return e
1073
1074
for if_tag in document.getElementsByTagName("interface"):
1075
# Add property tags
1076
for tag in (make_tag(document, name, prop)
1077
for name, prop
1078
in self._get_all_dbus_things("property")
1079
if prop._dbus_interface
1080
== if_tag.getAttribute("name")):
1081
if_tag.appendChild(tag)
1082
# Add annotation tags for properties
1083
for tag in if_tag.getElementsByTagName("property"):
1084
annots = dict()
1085
for name, prop in self._get_all_dbus_things(
1086
"property"):
1087
if (name == tag.getAttribute("name")
1088
and prop._dbus_interface
1089
== if_tag.getAttribute("name")):
1090
annots.update(getattr(
1091
prop, "_dbus_annotations", {}))
1092
for name, value in annots.items():
1093
ann_tag = document.createElement(
1094
"annotation")
1095
ann_tag.setAttribute("name", name)
1096
ann_tag.setAttribute("value", value)
1097
tag.appendChild(ann_tag)
1098
# Add the names to the return values for the
1099
# "org.freedesktop.DBus.Properties" methods
1100
if (if_tag.getAttribute("name")
1101
== "org.freedesktop.DBus.Properties"):
1102
for cn in if_tag.getElementsByTagName("method"):
1103
if cn.getAttribute("name") == "Get":
1104
for arg in cn.getElementsByTagName("arg"):
1105
if (arg.getAttribute("direction")
1106
== "out"):
1107
arg.setAttribute("name", "value")
1108
elif cn.getAttribute("name") == "GetAll":
1109
for arg in cn.getElementsByTagName("arg"):
1110
if (arg.getAttribute("direction")
1111
== "out"):
1112
arg.setAttribute("name", "props")
1113
xmlstring = document.toxml("utf-8")
1114
document.unlink()
1115
except (AttributeError, xml.dom.DOMException,
1116
xml.parsers.expat.ExpatError) as error:
1117
logger.error("Failed to override Introspection method",
1118
exc_info=error)
1119
return xmlstring
1120
1121
1122
def datetime_to_dbus(dt, variant_level=0):
1123
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1124
if dt is None:
1125
return dbus.String("", variant_level = variant_level)
1126
return dbus.String(dt.isoformat(), variant_level=variant_level)
1127
1128
1129
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1130
"""A class decorator; applied to a subclass of
1131
dbus.service.Object, it will add alternate D-Bus attributes with
1132
interface names according to the "alt_interface_names" mapping.
1133
Usage:
1134
1135
@alternate_dbus_interfaces({"org.example.Interface":
1136
"net.example.AlternateInterface"})
1137
class SampleDBusObject(dbus.service.Object):
1138
@dbus.service.method("org.example.Interface")
1139
def SampleDBusMethod():
1140
pass
1141
1142
The above "SampleDBusMethod" on "SampleDBusObject" will be
1143
reachable via two interfaces: "org.example.Interface" and
1144
"net.example.AlternateInterface", the latter of which will have
1145
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1146
"true", unless "deprecate" is passed with a False value.
1147
1148
This works for methods and signals, and also for D-Bus properties
1149
(from DBusObjectWithProperties) and interfaces (from the
1150
dbus_interface_annotations decorator).
1151
"""
1152
1153
def wrapper(cls):
1154
for orig_interface_name, alt_interface_name in (
1155
alt_interface_names.items()):
1156
attr = {}
1157
interface_names = set()
1158
# Go though all attributes of the class
1159
for attrname, attribute in inspect.getmembers(cls):
1160
# Ignore non-D-Bus attributes, and D-Bus attributes
1161
# with the wrong interface name
1162
if (not hasattr(attribute, "_dbus_interface")
1163
or not attribute._dbus_interface.startswith(
1164
orig_interface_name)):
1165
continue
1166
# Create an alternate D-Bus interface name based on
1167
# the current name
1168
alt_interface = attribute._dbus_interface.replace(
1169
orig_interface_name, alt_interface_name)
1170
interface_names.add(alt_interface)
1171
# Is this a D-Bus signal?
1172
if getattr(attribute, "_dbus_is_signal", False):
1173
if sys.version_info.major == 2:
1174
# Extract the original non-method undecorated
1175
# function by black magic
1176
nonmethod_func = (dict(
1177
zip(attribute.func_code.co_freevars,
1178
attribute.__closure__))
1179
["func"].cell_contents)
1180
else:
1181
nonmethod_func = attribute
1182
# Create a new, but exactly alike, function
1183
# object, and decorate it to be a new D-Bus signal
1184
# with the alternate D-Bus interface name
1185
if sys.version_info.major == 2:
1186
new_function = types.FunctionType(
1187
nonmethod_func.func_code,
1188
nonmethod_func.func_globals,
1189
nonmethod_func.func_name,
1190
nonmethod_func.func_defaults,
1191
nonmethod_func.func_closure)
1192
else:
1193
new_function = types.FunctionType(
1194
nonmethod_func.__code__,
1195
nonmethod_func.__globals__,
1196
nonmethod_func.__name__,
1197
nonmethod_func.__defaults__,
1198
nonmethod_func.__closure__)
1199
new_function = (dbus.service.signal(
1200
alt_interface,
1201
attribute._dbus_signature)(new_function))
1202
# Copy annotations, if any
1203
try:
1204
new_function._dbus_annotations = dict(
1205
attribute._dbus_annotations)
1206
except AttributeError:
1207
pass
1208
# Define a creator of a function to call both the
1209
# original and alternate functions, so both the
1210
# original and alternate signals gets sent when
1211
# the function is called
1212
def fixscope(func1, func2):
1213
"""This function is a scope container to pass
1214
func1 and func2 to the "call_both" function
1215
outside of its arguments"""
1216
1217
def call_both(*args, **kwargs):
1218
"""This function will emit two D-Bus
1219
signals by calling func1 and func2"""
1220
func1(*args, **kwargs)
1221
func2(*args, **kwargs)
1222
1223
return call_both
1224
# Create the "call_both" function and add it to
1225
# the class
1226
attr[attrname] = fixscope(attribute, new_function)
1227
# Is this a D-Bus method?
1228
elif getattr(attribute, "_dbus_is_method", False):
1229
# Create a new, but exactly alike, function
1230
# object. Decorate it to be a new D-Bus method
1231
# with the alternate D-Bus interface name. Add it
1232
# to the class.
1233
attr[attrname] = (
1234
dbus.service.method(
1235
alt_interface,
1236
attribute._dbus_in_signature,
1237
attribute._dbus_out_signature)
1238
(types.FunctionType(attribute.func_code,
1239
attribute.func_globals,
1240
attribute.func_name,
1241
attribute.func_defaults,
1242
attribute.func_closure)))
1243
# Copy annotations, if any
1244
try:
1245
attr[attrname]._dbus_annotations = dict(
1246
attribute._dbus_annotations)
1247
except AttributeError:
1248
pass
1249
# Is this a D-Bus property?
1250
elif getattr(attribute, "_dbus_is_property", False):
1251
# Create a new, but exactly alike, function
1252
# object, and decorate it to be a new D-Bus
1253
# property with the alternate D-Bus interface
1254
# name. Add it to the class.
1255
attr[attrname] = (dbus_service_property(
1256
alt_interface, attribute._dbus_signature,
1257
attribute._dbus_access,
1258
attribute._dbus_get_args_options
1259
["byte_arrays"])
1260
(types.FunctionType(
1261
attribute.func_code,
1262
attribute.func_globals,
1263
attribute.func_name,
1264
attribute.func_defaults,
1265
attribute.func_closure)))
1266
# Copy annotations, if any
1267
try:
1268
attr[attrname]._dbus_annotations = dict(
1269
attribute._dbus_annotations)
1270
except AttributeError:
1271
pass
1272
# Is this a D-Bus interface?
1273
elif getattr(attribute, "_dbus_is_interface", False):
1274
# Create a new, but exactly alike, function
1275
# object. Decorate it to be a new D-Bus interface
1276
# with the alternate D-Bus interface name. Add it
1277
# to the class.
1278
attr[attrname] = (
1279
dbus_interface_annotations(alt_interface)
1280
(types.FunctionType(attribute.func_code,
1281
attribute.func_globals,
1282
attribute.func_name,
1283
attribute.func_defaults,
1284
attribute.func_closure)))
1285
if deprecate:
1286
# Deprecate all alternate interfaces
1287
iname="_AlternateDBusNames_interface_annotation{}"
1288
for interface_name in interface_names:
1289
1290
@dbus_interface_annotations(interface_name)
1291
def func(self):
1292
return { "org.freedesktop.DBus.Deprecated":
1293
"true" }
1294
# Find an unused name
1295
for aname in (iname.format(i)
1296
for i in itertools.count()):
1297
if aname not in attr:
1298
attr[aname] = func
1299
break
1300
if interface_names:
1301
# Replace the class with a new subclass of it with
1302
# methods, signals, etc. as created above.
1303
cls = type(b"{}Alternate".format(cls.__name__),
1304
(cls, ), attr)
1305
return cls
1306
1307
return wrapper
1308
1309
1310
@alternate_dbus_interfaces({"se.recompile.Mandos":
1311
"se.bsnet.fukt.Mandos"})
1312
class ClientDBus(Client, DBusObjectWithProperties):
1313
"""A Client class using D-Bus
1314
1315
Attributes:
1316
dbus_object_path: dbus.ObjectPath
1317
bus: dbus.SystemBus()
1318
"""
1319
1320
runtime_expansions = (Client.runtime_expansions
1321
+ ("dbus_object_path", ))
1322
1323
_interface = "se.recompile.Mandos.Client"
1324
1325
# dbus.service.Object doesn't use super(), so we can't either.
1326
1327
def __init__(self, bus = None, *args, **kwargs):
1328
self.bus = bus
1329
Client.__init__(self, *args, **kwargs)
1330
# Only now, when this client is initialized, can it show up on
1331
# the D-Bus
1332
client_object_name = str(self.name).translate(
1333
{ord("."): ord("_"),
1334
ord("-"): ord("_")})
1335
self.dbus_object_path = dbus.ObjectPath(
1336
"/clients/" + client_object_name)
1337
DBusObjectWithProperties.__init__(self, self.bus,
1338
self.dbus_object_path)
1339
1340
def notifychangeproperty(transform_func, dbus_name,
1341
type_func=lambda x: x,
1342
variant_level=1,
1343
invalidate_only=False,
1344
_interface=_interface):
1345
""" Modify a variable so that it's a property which announces
1346
its changes to DBus.
1347
1348
transform_fun: Function that takes a value and a variant_level
1349
and transforms it to a D-Bus type.
1350
dbus_name: D-Bus name of the variable
1351
type_func: Function that transform the value before sending it
1352
to the D-Bus. Default: no transform
1353
variant_level: D-Bus variant level. Default: 1
1354
"""
1355
attrname = "_{}".format(dbus_name)
1356
1357
def setter(self, value):
1358
if hasattr(self, "dbus_object_path"):
1359
if (not hasattr(self, attrname) or
1360
type_func(getattr(self, attrname, None))
1361
!= type_func(value)):
1362
if invalidate_only:
1363
self.PropertiesChanged(
1364
_interface, dbus.Dictionary(),
1365
dbus.Array((dbus_name, )))
1366
else:
1367
dbus_value = transform_func(
1368
type_func(value),
1369
variant_level = variant_level)
1370
self.PropertyChanged(dbus.String(dbus_name),
1371
dbus_value)
1372
self.PropertiesChanged(
1373
_interface,
1374
dbus.Dictionary({ dbus.String(dbus_name):
1375
dbus_value }),
1376
dbus.Array())
1377
setattr(self, attrname, value)
1378
1379
return property(lambda self: getattr(self, attrname), setter)
1380
1381
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1382
approvals_pending = notifychangeproperty(dbus.Boolean,
1383
"ApprovalPending",
1384
type_func = bool)
1385
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1386
last_enabled = notifychangeproperty(datetime_to_dbus,
1387
"LastEnabled")
1388
checker = notifychangeproperty(
1389
dbus.Boolean, "CheckerRunning",
1390
type_func = lambda checker: checker is not None)
1391
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1392
"LastCheckedOK")
1393
last_checker_status = notifychangeproperty(dbus.Int16,
1394
"LastCheckerStatus")
1395
last_approval_request = notifychangeproperty(
1396
datetime_to_dbus, "LastApprovalRequest")
1397
approved_by_default = notifychangeproperty(dbus.Boolean,
1398
"ApprovedByDefault")
1399
approval_delay = notifychangeproperty(
1400
dbus.UInt64, "ApprovalDelay",
1401
type_func = lambda td: td.total_seconds() * 1000)
1402
approval_duration = notifychangeproperty(
1403
dbus.UInt64, "ApprovalDuration",
1404
type_func = lambda td: td.total_seconds() * 1000)
1405
host = notifychangeproperty(dbus.String, "Host")
1406
timeout = notifychangeproperty(
1407
dbus.UInt64, "Timeout",
1408
type_func = lambda td: td.total_seconds() * 1000)
1409
extended_timeout = notifychangeproperty(
1410
dbus.UInt64, "ExtendedTimeout",
1411
type_func = lambda td: td.total_seconds() * 1000)
1412
interval = notifychangeproperty(
1413
dbus.UInt64, "Interval",
1414
type_func = lambda td: td.total_seconds() * 1000)
1415
checker_command = notifychangeproperty(dbus.String, "Checker")
1416
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1417
invalidate_only=True)
1418
1419
del notifychangeproperty
1420
1421
def __del__(self, *args, **kwargs):
1422
try:
1423
self.remove_from_connection()
1424
except LookupError:
1425
pass
1426
if hasattr(DBusObjectWithProperties, "__del__"):
1427
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1428
Client.__del__(self, *args, **kwargs)
1429
1430
def checker_callback(self, source, condition,
1431
connection, command, *args, **kwargs):
1432
ret = Client.checker_callback(self, source, condition,
1433
connection, command, *args,
1434
**kwargs)
1435
exitstatus = self.last_checker_status
1436
if exitstatus >= 0:
1437
# Emit D-Bus signal
1438
self.CheckerCompleted(dbus.Int16(exitstatus),
1439
# This is specific to GNU libC
1440
dbus.Int64(exitstatus << 8),
1441
dbus.String(command))
1442
else:
1443
# Emit D-Bus signal
1444
self.CheckerCompleted(dbus.Int16(-1),
1445
dbus.Int64(
1446
# This is specific to GNU libC
1447
(exitstatus << 8)
1448
| self.last_checker_signal),
1449
dbus.String(command))
1450
return ret
1451
1452
def start_checker(self, *args, **kwargs):
1453
old_checker_pid = getattr(self.checker, "pid", None)
1454
r = Client.start_checker(self, *args, **kwargs)
1455
# Only if new checker process was started
1456
if (self.checker is not None
1457
and old_checker_pid != self.checker.pid):
1458
# Emit D-Bus signal
1459
self.CheckerStarted(self.current_checker_command)
1460
return r
1461
1462
def _reset_approved(self):
1463
self.approved = None
1464
return False
1465
1466
def approve(self, value=True):
1467
self.approved = value
1468
gobject.timeout_add(int(self.approval_duration.total_seconds()
1469
* 1000), self._reset_approved)
1470
self.send_changedstate()
1471
1472
## D-Bus methods, signals & properties
1473
1474
## Interfaces
1475
1476
## Signals
1477
1478
# CheckerCompleted - signal
1479
@dbus.service.signal(_interface, signature="nxs")
1480
def CheckerCompleted(self, exitcode, waitstatus, command):
1481
"D-Bus signal"
1482
pass
1483
1484
# CheckerStarted - signal
1485
@dbus.service.signal(_interface, signature="s")
1486
def CheckerStarted(self, command):
1487
"D-Bus signal"
1488
pass
1489
1490
# PropertyChanged - signal
1491
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1492
@dbus.service.signal(_interface, signature="sv")
1493
def PropertyChanged(self, property, value):
1494
"D-Bus signal"
1495
pass
1496
1497
# GotSecret - signal
1498
@dbus.service.signal(_interface)
1499
def GotSecret(self):
1500
"""D-Bus signal
1501
Is sent after a successful transfer of secret from the Mandos
1502
server to mandos-client
1503
"""
1504
pass
1505
1506
# Rejected - signal
1507
@dbus.service.signal(_interface, signature="s")
1508
def Rejected(self, reason):
1509
"D-Bus signal"
1510
pass
1511
1512
# NeedApproval - signal
1513
@dbus.service.signal(_interface, signature="tb")
1514
def NeedApproval(self, timeout, default):
1515
"D-Bus signal"
1516
return self.need_approval()
1517
1518
## Methods
1519
1520
# Approve - method
1521
@dbus.service.method(_interface, in_signature="b")
1522
def Approve(self, value):
1523
self.approve(value)
1524
1525
# CheckedOK - method
1526
@dbus.service.method(_interface)
1527
def CheckedOK(self):
1528
self.checked_ok()
1529
1530
# Enable - method
1531
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1532
@dbus.service.method(_interface)
1533
def Enable(self):
1534
"D-Bus method"
1535
self.enable()
1536
1537
# StartChecker - method
1538
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1539
@dbus.service.method(_interface)
1540
def StartChecker(self):
1541
"D-Bus method"
1542
self.start_checker()
1543
1544
# Disable - method
1545
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1546
@dbus.service.method(_interface)
1547
def Disable(self):
1548
"D-Bus method"
1549
self.disable()
1550
1551
# StopChecker - method
1552
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1553
@dbus.service.method(_interface)
1554
def StopChecker(self):
1555
self.stop_checker()
1556
1557
## Properties
1558
1559
# ApprovalPending - property
1560
@dbus_service_property(_interface, signature="b", access="read")
1561
def ApprovalPending_dbus_property(self):
1562
return dbus.Boolean(bool(self.approvals_pending))
1563
1564
# ApprovedByDefault - property
1565
@dbus_service_property(_interface,
1566
signature="b",
1567
access="readwrite")
1568
def ApprovedByDefault_dbus_property(self, value=None):
1569
if value is None: # get
1570
return dbus.Boolean(self.approved_by_default)
1571
self.approved_by_default = bool(value)
1572
1573
# ApprovalDelay - property
1574
@dbus_service_property(_interface,
1575
signature="t",
1576
access="readwrite")
1577
def ApprovalDelay_dbus_property(self, value=None):
1578
if value is None: # get
1579
return dbus.UInt64(self.approval_delay.total_seconds()
1580
* 1000)
1581
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1582
1583
# ApprovalDuration - property
1584
@dbus_service_property(_interface,
1585
signature="t",
1586
access="readwrite")
1587
def ApprovalDuration_dbus_property(self, value=None):
1588
if value is None: # get
1589
return dbus.UInt64(self.approval_duration.total_seconds()
1590
* 1000)
1591
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1592
1593
# Name - property
1594
@dbus_annotations(
1595
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1596
@dbus_service_property(_interface, signature="s", access="read")
1597
def Name_dbus_property(self):
1598
return dbus.String(self.name)
1599
1600
# Fingerprint - property
1601
@dbus_annotations(
1602
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1603
@dbus_service_property(_interface, signature="s", access="read")
1604
def Fingerprint_dbus_property(self):
1605
return dbus.String(self.fingerprint)
1606
1607
# Host - property
1608
@dbus_service_property(_interface,
1609
signature="s",
1610
access="readwrite")
1611
def Host_dbus_property(self, value=None):
1612
if value is None: # get
1613
return dbus.String(self.host)
1614
self.host = str(value)
1615
1616
# Created - property
1617
@dbus_annotations(
1618
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1619
@dbus_service_property(_interface, signature="s", access="read")
1620
def Created_dbus_property(self):
1621
return datetime_to_dbus(self.created)
1622
1623
# LastEnabled - property
1624
@dbus_service_property(_interface, signature="s", access="read")
1625
def LastEnabled_dbus_property(self):
1626
return datetime_to_dbus(self.last_enabled)
1627
1628
# Enabled - property
1629
@dbus_service_property(_interface,
1630
signature="b",
1631
access="readwrite")
1632
def Enabled_dbus_property(self, value=None):
1633
if value is None: # get
1634
return dbus.Boolean(self.enabled)
1635
if value:
1636
self.enable()
1637
else:
1638
self.disable()
1639
1640
# LastCheckedOK - property
1641
@dbus_service_property(_interface,
1642
signature="s",
1643
access="readwrite")
1644
def LastCheckedOK_dbus_property(self, value=None):
1645
if value is not None:
1646
self.checked_ok()
1647
return
1648
return datetime_to_dbus(self.last_checked_ok)
1649
1650
# LastCheckerStatus - property
1651
@dbus_service_property(_interface, signature="n", access="read")
1652
def LastCheckerStatus_dbus_property(self):
1653
return dbus.Int16(self.last_checker_status)
1654
1655
# Expires - property
1656
@dbus_service_property(_interface, signature="s", access="read")
1657
def Expires_dbus_property(self):
1658
return datetime_to_dbus(self.expires)
1659
1660
# LastApprovalRequest - property
1661
@dbus_service_property(_interface, signature="s", access="read")
1662
def LastApprovalRequest_dbus_property(self):
1663
return datetime_to_dbus(self.last_approval_request)
1664
1665
# Timeout - property
1666
@dbus_service_property(_interface,
1667
signature="t",
1668
access="readwrite")
1669
def Timeout_dbus_property(self, value=None):
1670
if value is None: # get
1671
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1672
old_timeout = self.timeout
1673
self.timeout = datetime.timedelta(0, 0, 0, value)
1674
# Reschedule disabling
1675
if self.enabled:
1676
now = datetime.datetime.utcnow()
1677
self.expires += self.timeout - old_timeout
1678
if self.expires <= now:
1679
# The timeout has passed
1680
self.disable()
1681
else:
1682
if (getattr(self, "disable_initiator_tag", None)
1683
is None):
1684
return
1685
gobject.source_remove(self.disable_initiator_tag)
1686
self.disable_initiator_tag = gobject.timeout_add(
1687
int((self.expires - now).total_seconds() * 1000),
1688
self.disable)
1689
1690
# ExtendedTimeout - property
1691
@dbus_service_property(_interface,
1692
signature="t",
1693
access="readwrite")
1694
def ExtendedTimeout_dbus_property(self, value=None):
1695
if value is None: # get
1696
return dbus.UInt64(self.extended_timeout.total_seconds()
1697
* 1000)
1698
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1699
1700
# Interval - property
1701
@dbus_service_property(_interface,
1702
signature="t",
1703
access="readwrite")
1704
def Interval_dbus_property(self, value=None):
1705
if value is None: # get
1706
return dbus.UInt64(self.interval.total_seconds() * 1000)
1707
self.interval = datetime.timedelta(0, 0, 0, value)
1708
if getattr(self, "checker_initiator_tag", None) is None:
1709
return
1710
if self.enabled:
1711
# Reschedule checker run
1712
gobject.source_remove(self.checker_initiator_tag)
1713
self.checker_initiator_tag = gobject.timeout_add(
1714
value, self.start_checker)
1715
self.start_checker() # Start one now, too
1716
1717
# Checker - property
1718
@dbus_service_property(_interface,
1719
signature="s",
1720
access="readwrite")
1721
def Checker_dbus_property(self, value=None):
1722
if value is None: # get
1723
return dbus.String(self.checker_command)
1724
self.checker_command = str(value)
1725
1726
# CheckerRunning - property
1727
@dbus_service_property(_interface,
1728
signature="b",
1729
access="readwrite")
1730
def CheckerRunning_dbus_property(self, value=None):
1731
if value is None: # get
1732
return dbus.Boolean(self.checker is not None)
1733
if value:
1734
self.start_checker()
1735
else:
1736
self.stop_checker()
1737
1738
# ObjectPath - property
1739
@dbus_annotations(
1740
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
1741
"org.freedesktop.DBus.Deprecated": "true"})
1742
@dbus_service_property(_interface, signature="o", access="read")
1743
def ObjectPath_dbus_property(self):
1744
return self.dbus_object_path # is already a dbus.ObjectPath
1745
1746
# Secret = property
1747
@dbus_annotations(
1748
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
1749
"invalidates"})
1750
@dbus_service_property(_interface,
1751
signature="ay",
1752
access="write",
1753
byte_arrays=True)
1754
def Secret_dbus_property(self, value):
1755
self.secret = bytes(value)
1756
1757
del _interface
1758
1759
1760
class ProxyClient(object):
1761
def __init__(self, child_pipe, fpr, address):
1762
self._pipe = child_pipe
1763
self._pipe.send(('init', fpr, address))
1764
if not self._pipe.recv():
1765
raise KeyError(fpr)
1766
1767
def __getattribute__(self, name):
1768
if name == '_pipe':
1769
return super(ProxyClient, self).__getattribute__(name)
1770
self._pipe.send(('getattr', name))
1771
data = self._pipe.recv()
1772
if data[0] == 'data':
1773
return data[1]
1774
if data[0] == 'function':
1775
1776
def func(*args, **kwargs):
1777
self._pipe.send(('funcall', name, args, kwargs))
1778
return self._pipe.recv()[1]
1779
1780
return func
1781
1782
def __setattr__(self, name, value):
1783
if name == '_pipe':
1784
return super(ProxyClient, self).__setattr__(name, value)
1785
self._pipe.send(('setattr', name, value))
1786
1787
1788
class ClientHandler(socketserver.BaseRequestHandler, object):
1789
"""A class to handle client connections.
1790
1791
Instantiated once for each connection to handle it.
431
1792
Note: This will run in its own forked process."""
432
1793
433
1794
def handle(self):
434
logger.debug(u"TCP connection from: %s",
435
unicode(self.client_address))
436
session = gnutls.connection.ClientSession\
437
(self.request, gnutls.connection.X509Credentials())
438
439
line = self.request.makefile().readline()
440
logger.debug(u"Protocol version: %r", line)
441
try:
442
if int(line.strip().split()[0]) > 1:
443
raise RuntimeError
444
except (ValueError, IndexError, RuntimeError), error:
445
logger.error(u"Unknown protocol version: %s", error)
446
return
447
448
# Note: gnutls.connection.X509Credentials is really a generic
449
# GnuTLS certificate credentials object so long as no X.509
450
# keys are added to it. Therefore, we can use it here despite
451
# using OpenPGP certificates.
452
453
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
454
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
455
# "+DHE-DSS"))
456
priority = "NORMAL" # Fallback default, since this
457
# MUST be set.
458
if self.server.settings["priority"]:
459
priority = self.server.settings["priority"]
460
gnutls.library.functions.gnutls_priority_set_direct\
461
(session._c_object, priority, None);
462
463
try:
464
session.handshake()
465
except gnutls.errors.GNUTLSError, error:
466
logger.debug(u"Handshake failed: %s", error)
467
# Do not run session.bye() here: the session is not
468
# established. Just abandon the request.
469
return
470
try:
471
fpr = fingerprint(peer_certificate(session))
472
except (TypeError, gnutls.errors.GNUTLSError), error:
473
logger.debug(u"Bad certificate: %s", error)
474
session.bye()
475
return
476
logger.debug(u"Fingerprint: %s", fpr)
477
client = None
478
for c in self.server.clients:
479
if c.fingerprint == fpr:
480
client = c
481
break
482
if not client:
483
logger.debug(u"Client not found for fingerprint: %s", fpr)
484
session.bye()
485
return
486
# Have to check if client.still_valid(), since it is possible
487
# that the client timed out while establishing the GnuTLS
488
# session.
489
if not client.still_valid():
490
logger.debug(u"Client %(name)s is invalid", vars(client))
491
session.bye()
492
return
493
sent_size = 0
494
while sent_size < len(client.secret):
495
sent = session.send(client.secret[sent_size:])
496
logger.debug(u"Sent: %d, remaining: %d",
497
sent, len(client.secret)
498
- (sent_size + sent))
499
sent_size += sent
500
session.bye()
501
502
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1795
with contextlib.closing(self.server.child_pipe) as child_pipe:
1796
logger.info("TCP connection from: %s",
1797
str(self.client_address))
1798
logger.debug("Pipe FD: %d",
1799
self.server.child_pipe.fileno())
1800
1801
session = gnutls.connection.ClientSession(
1802
self.request, gnutls.connection .X509Credentials())
1803
1804
# Note: gnutls.connection.X509Credentials is really a
1805
# generic GnuTLS certificate credentials object so long as
1806
# no X.509 keys are added to it. Therefore, we can use it
1807
# here despite using OpenPGP certificates.
1808
1809
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1810
# "+AES-256-CBC", "+SHA1",
1811
# "+COMP-NULL", "+CTYPE-OPENPGP",
1812
# "+DHE-DSS"))
1813
# Use a fallback default, since this MUST be set.
1814
priority = self.server.gnutls_priority
1815
if priority is None:
1816
priority = "NORMAL"
1817
gnutls.library.functions.gnutls_priority_set_direct(
1818
session._c_object, priority, None)
1819
1820
# Start communication using the Mandos protocol
1821
# Get protocol number
1822
line = self.request.makefile().readline()
1823
logger.debug("Protocol version: %r", line)
1824
try:
1825
if int(line.strip().split()[0]) > 1:
1826
raise RuntimeError(line)
1827
except (ValueError, IndexError, RuntimeError) as error:
1828
logger.error("Unknown protocol version: %s", error)
1829
return
1830
1831
# Start GnuTLS connection
1832
try:
1833
session.handshake()
1834
except gnutls.errors.GNUTLSError as error:
1835
logger.warning("Handshake failed: %s", error)
1836
# Do not run session.bye() here: the session is not
1837
# established. Just abandon the request.
1838
return
1839
logger.debug("Handshake succeeded")
1840
1841
approval_required = False
1842
try:
1843
try:
1844
fpr = self.fingerprint(
1845
self.peer_certificate(session))
1846
except (TypeError,
1847
gnutls.errors.GNUTLSError) as error:
1848
logger.warning("Bad certificate: %s", error)
1849
return
1850
logger.debug("Fingerprint: %s", fpr)
1851
1852
try:
1853
client = ProxyClient(child_pipe, fpr,
1854
self.client_address)
1855
except KeyError:
1856
return
1857
1858
if client.approval_delay:
1859
delay = client.approval_delay
1860
client.approvals_pending += 1
1861
approval_required = True
1862
1863
while True:
1864
if not client.enabled:
1865
logger.info("Client %s is disabled",
1866
client.name)
1867
if self.server.use_dbus:
1868
# Emit D-Bus signal
1869
client.Rejected("Disabled")
1870
return
1871
1872
if client.approved or not client.approval_delay:
1873
#We are approved or approval is disabled
1874
break
1875
elif client.approved is None:
1876
logger.info("Client %s needs approval",
1877
client.name)
1878
if self.server.use_dbus:
1879
# Emit D-Bus signal
1880
client.NeedApproval(
1881
client.approval_delay.total_seconds()
1882
* 1000, client.approved_by_default)
1883
else:
1884
logger.warning("Client %s was not approved",
1885
client.name)
1886
if self.server.use_dbus:
1887
# Emit D-Bus signal
1888
client.Rejected("Denied")
1889
return
1890
1891
#wait until timeout or approved
1892
time = datetime.datetime.now()
1893
client.changedstate.acquire()
1894
client.changedstate.wait(delay.total_seconds())
1895
client.changedstate.release()
1896
time2 = datetime.datetime.now()
1897
if (time2 - time) >= delay:
1898
if not client.approved_by_default:
1899
logger.warning("Client %s timed out while"
1900
" waiting for approval",
1901
client.name)
1902
if self.server.use_dbus:
1903
# Emit D-Bus signal
1904
client.Rejected("Approval timed out")
1905
return
1906
else:
1907
break
1908
else:
1909
delay -= time2 - time
1910
1911
sent_size = 0
1912
while sent_size < len(client.secret):
1913
try:
1914
sent = session.send(client.secret[sent_size:])
1915
except gnutls.errors.GNUTLSError as error:
1916
logger.warning("gnutls send failed",
1917
exc_info=error)
1918
return
1919
logger.debug("Sent: %d, remaining: %d", sent,
1920
len(client.secret) - (sent_size
1921
+ sent))
1922
sent_size += sent
1923
1924
logger.info("Sending secret to %s", client.name)
1925
# bump the timeout using extended_timeout
1926
client.bump_timeout(client.extended_timeout)
1927
if self.server.use_dbus:
1928
# Emit D-Bus signal
1929
client.GotSecret()
1930
1931
finally:
1932
if approval_required:
1933
client.approvals_pending -= 1
1934
try:
1935
session.bye()
1936
except gnutls.errors.GNUTLSError as error:
1937
logger.warning("GnuTLS bye failed",
1938
exc_info=error)
1939
1940
@staticmethod
1941
def peer_certificate(session):
1942
"Return the peer's OpenPGP certificate as a bytestring"
1943
# If not an OpenPGP certificate...
1944
if (gnutls.library.functions.gnutls_certificate_type_get(
1945
session._c_object)
1946
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1947
# ...do the normal thing
1948
return session.peer_certificate
1949
list_size = ctypes.c_uint(1)
1950
cert_list = (gnutls.library.functions
1951
.gnutls_certificate_get_peers
1952
(session._c_object, ctypes.byref(list_size)))
1953
if not bool(cert_list) and list_size.value != 0:
1954
raise gnutls.errors.GNUTLSError("error getting peer"
1955
" certificate")
1956
if list_size.value == 0:
1957
return None
1958
cert = cert_list[0]
1959
return ctypes.string_at(cert.data, cert.size)
1960
1961
@staticmethod
1962
def fingerprint(openpgp):
1963
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1964
# New GnuTLS "datum" with the OpenPGP public key
1965
datum = gnutls.library.types.gnutls_datum_t(
1966
ctypes.cast(ctypes.c_char_p(openpgp),
1967
ctypes.POINTER(ctypes.c_ubyte)),
1968
ctypes.c_uint(len(openpgp)))
1969
# New empty GnuTLS certificate
1970
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1971
gnutls.library.functions.gnutls_openpgp_crt_init(
1972
ctypes.byref(crt))
1973
# Import the OpenPGP public key into the certificate
1974
gnutls.library.functions.gnutls_openpgp_crt_import(
1975
crt, ctypes.byref(datum),
1976
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1977
# Verify the self signature in the key
1978
crtverify = ctypes.c_uint()
1979
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1980
crt, 0, ctypes.byref(crtverify))
1981
if crtverify.value != 0:
1982
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1983
raise gnutls.errors.CertificateSecurityError(
1984
"Verify failed")
1985
# New buffer for the fingerprint
1986
buf = ctypes.create_string_buffer(20)
1987
buf_len = ctypes.c_size_t()
1988
# Get the fingerprint from the certificate into the buffer
1989
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1990
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1991
# Deinit the certificate
1992
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1993
# Convert the buffer to a Python bytestring
1994
fpr = ctypes.string_at(buf, buf_len.value)
1995
# Convert the bytestring to hexadecimal notation
1996
hex_fpr = binascii.hexlify(fpr).upper()
1997
return hex_fpr
1998
1999
2000
class MultiprocessingMixIn(object):
2001
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2002
2003
def sub_process_main(self, request, address):
2004
try:
2005
self.finish_request(request, address)
2006
except Exception:
2007
self.handle_error(request, address)
2008
self.close_request(request)
2009
2010
def process_request(self, request, address):
2011
"""Start a new process to process the request."""
2012
proc = multiprocessing.Process(target = self.sub_process_main,
2013
args = (request, address))
2014
proc.start()
2015
return proc
2016
2017
2018
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2019
""" adds a pipe to the MixIn """
2020
2021
def process_request(self, request, client_address):
2022
"""Overrides and wraps the original process_request().
2023
2024
This function creates a new pipe in self.pipe
2025
"""
2026
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2027
2028
proc = MultiprocessingMixIn.process_request(self, request,
2029
client_address)
2030
self.child_pipe.close()
2031
self.add_pipe(parent_pipe, proc)
2032
2033
def add_pipe(self, parent_pipe, proc):
2034
"""Dummy function; override as necessary"""
2035
raise NotImplementedError()
2036
2037
2038
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2039
socketserver.TCPServer, object):
2040
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2041
505
2042
Attributes:
506
settings: Server settings
507
clients: Set() of Client objects
2043
enabled: Boolean; whether this server is activated yet
2044
interface: None or a network interface name (string)
2045
use_ipv6: Boolean; to use IPv6 or not
508
2046
"""
509
address_family = socket.AF_INET6
510
def __init__(self, *args, **kwargs):
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
514
if "clients" in kwargs:
515
self.clients = kwargs["clients"]
516
del kwargs["clients"]
517
return super(type(self), self).__init__(*args, **kwargs)
2047
2048
def __init__(self, server_address, RequestHandlerClass,
2049
interface=None,
2050
use_ipv6=True,
2051
socketfd=None):
2052
"""If socketfd is set, use that file descriptor instead of
2053
creating a new one with socket.socket().
2054
"""
2055
self.interface = interface
2056
if use_ipv6:
2057
self.address_family = socket.AF_INET6
2058
if socketfd is not None:
2059
# Save the file descriptor
2060
self.socketfd = socketfd
2061
# Save the original socket.socket() function
2062
self.socket_socket = socket.socket
2063
# To implement --socket, we monkey patch socket.socket.
2064
#
2065
# (When socketserver.TCPServer is a new-style class, we
2066
# could make self.socket into a property instead of monkey
2067
# patching socket.socket.)
2068
#
2069
# Create a one-time-only replacement for socket.socket()
2070
@functools.wraps(socket.socket)
2071
def socket_wrapper(*args, **kwargs):
2072
# Restore original function so subsequent calls are
2073
# not affected.
2074
socket.socket = self.socket_socket
2075
del self.socket_socket
2076
# This time only, return a new socket object from the
2077
# saved file descriptor.
2078
return socket.fromfd(self.socketfd, *args, **kwargs)
2079
# Replace socket.socket() function with wrapper
2080
socket.socket = socket_wrapper
2081
# The socketserver.TCPServer.__init__ will call
2082
# socket.socket(), which might be our replacement,
2083
# socket_wrapper(), if socketfd was set.
2084
socketserver.TCPServer.__init__(self, server_address,
2085
RequestHandlerClass)
2086
518
2087
def server_bind(self):
519
2088
"""This overrides the normal server_bind() function
520
2089
to bind to an interface if one was specified, and also NOT to
521
2090
bind to an address or port if they were not specified."""
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
525
try:
526
self.socket.setsockopt(socket.SOL_SOCKET,
527
SO_BINDTODEVICE,
528
self.settings["interface"])
529
except socket.error, error:
530
if error[0] == errno.EPERM:
531
logger.warning(u"No permission to"
532
u" bind to interface %s",
533
self.settings["interface"])
534
else:
535
raise error
2091
if self.interface is not None:
2092
if SO_BINDTODEVICE is None:
2093
logger.error("SO_BINDTODEVICE does not exist;"
2094
" cannot bind to interface %s",
2095
self.interface)
2096
else:
2097
try:
2098
self.socket.setsockopt(
2099
socket.SOL_SOCKET, SO_BINDTODEVICE,
2100
(self.interface + "\0").encode("utf-8"))
2101
except socket.error as error:
2102
if error.errno == errno.EPERM:
2103
logger.error("No permission to bind to"
2104
" interface %s", self.interface)
2105
elif error.errno == errno.ENOPROTOOPT:
2106
logger.error("SO_BINDTODEVICE not available;"
2107
" cannot bind to interface %s",
2108
self.interface)
2109
elif error.errno == errno.ENODEV:
2110
logger.error("Interface %s does not exist,"
2111
" cannot bind", self.interface)
2112
else:
2113
raise
536
2114
# Only bind(2) the socket if we really need to.
537
2115
if self.server_address[0] or self.server_address[1]:
538
2116
if not self.server_address[0]:
539
in6addr_any = "::"
540
self.server_address = (in6addr_any,
2117
if self.address_family == socket.AF_INET6:
2118
any_address = "::" # in6addr_any
2119
else:
2120
any_address = "0.0.0.0" # INADDR_ANY
2121
self.server_address = (any_address,
541
2122
self.server_address[1])
542
elif self.server_address[1] is None:
543
self.server_address = (self.server_address[0],
544
0)
545
return super(type(self), self).server_bind()
2123
elif not self.server_address[1]:
2124
self.server_address = (self.server_address[0], 0)
2125
# if self.interface:
2126
# self.server_address = (self.server_address[0],
2127
# 0, # port
2128
# 0, # flowinfo
2129
# if_nametoindex
2130
# (self.interface))
2131
return socketserver.TCPServer.server_bind(self)
2132
2133
2134
class MandosServer(IPv6_TCPServer):
2135
"""Mandos server.
2136
2137
Attributes:
2138
clients: set of Client objects
2139
gnutls_priority GnuTLS priority string
2140
use_dbus: Boolean; to emit D-Bus signals or not
2141
2142
Assumes a gobject.MainLoop event loop.
2143
"""
2144
2145
def __init__(self, server_address, RequestHandlerClass,
2146
interface=None,
2147
use_ipv6=True,
2148
clients=None,
2149
gnutls_priority=None,
2150
use_dbus=True,
2151
socketfd=None):
2152
self.enabled = False
2153
self.clients = clients
2154
if self.clients is None:
2155
self.clients = {}
2156
self.use_dbus = use_dbus
2157
self.gnutls_priority = gnutls_priority
2158
IPv6_TCPServer.__init__(self, server_address,
2159
RequestHandlerClass,
2160
interface = interface,
2161
use_ipv6 = use_ipv6,
2162
socketfd = socketfd)
2163
2164
def server_activate(self):
2165
if self.enabled:
2166
return socketserver.TCPServer.server_activate(self)
2167
2168
def enable(self):
2169
self.enabled = True
2170
2171
def add_pipe(self, parent_pipe, proc):
2172
# Call "handle_ipc" for both data and EOF events
2173
gobject.io_add_watch(
2174
parent_pipe.fileno(),
2175
gobject.IO_IN | gobject.IO_HUP,
2176
functools.partial(self.handle_ipc,
2177
parent_pipe = parent_pipe,
2178
proc = proc))
2179
2180
def handle_ipc(self, source, condition,
2181
parent_pipe=None,
2182
proc = None,
2183
client_object=None):
2184
# error, or the other end of multiprocessing.Pipe has closed
2185
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2186
# Wait for other process to exit
2187
proc.join()
2188
return False
2189
2190
# Read a request from the child
2191
request = parent_pipe.recv()
2192
command = request[0]
2193
2194
if command == 'init':
2195
fpr = request[1]
2196
address = request[2]
2197
2198
for c in self.clients.itervalues():
2199
if c.fingerprint == fpr:
2200
client = c
2201
break
2202
else:
2203
logger.info("Client not found for fingerprint: %s, ad"
2204
"dress: %s", fpr, address)
2205
if self.use_dbus:
2206
# Emit D-Bus signal
2207
mandos_dbus_service.ClientNotFound(fpr,
2208
address[0])
2209
parent_pipe.send(False)
2210
return False
2211
2212
gobject.io_add_watch(
2213
parent_pipe.fileno(),
2214
gobject.IO_IN | gobject.IO_HUP,
2215
functools.partial(self.handle_ipc,
2216
parent_pipe = parent_pipe,
2217
proc = proc,
2218
client_object = client))
2219
parent_pipe.send(True)
2220
# remove the old hook in favor of the new above hook on
2221
# same fileno
2222
return False
2223
if command == 'funcall':
2224
funcname = request[1]
2225
args = request[2]
2226
kwargs = request[3]
2227
2228
parent_pipe.send(('data', getattr(client_object,
2229
funcname)(*args,
2230
**kwargs)))
2231
2232
if command == 'getattr':
2233
attrname = request[1]
2234
if isinstance(client_object.__getattribute__(attrname),
2235
collections.Callable):
2236
parent_pipe.send(('function', ))
2237
else:
2238
parent_pipe.send((
2239
'data', client_object.__getattribute__(attrname)))
2240
2241
if command == 'setattr':
2242
attrname = request[1]
2243
value = request[2]
2244
setattr(client_object, attrname, value)
2245
2246
return True
2247
2248
2249
def rfc3339_duration_to_delta(duration):
2250
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2251
2252
>>> rfc3339_duration_to_delta("P7D")
2253
datetime.timedelta(7)
2254
>>> rfc3339_duration_to_delta("PT60S")
2255
datetime.timedelta(0, 60)
2256
>>> rfc3339_duration_to_delta("PT60M")
2257
datetime.timedelta(0, 3600)
2258
>>> rfc3339_duration_to_delta("PT24H")
2259
datetime.timedelta(1)
2260
>>> rfc3339_duration_to_delta("P1W")
2261
datetime.timedelta(7)
2262
>>> rfc3339_duration_to_delta("PT5M30S")
2263
datetime.timedelta(0, 330)
2264
>>> rfc3339_duration_to_delta("P1DT3M20S")
2265
datetime.timedelta(1, 200)
2266
"""
2267
2268
# Parsing an RFC 3339 duration with regular expressions is not
2269
# possible - there would have to be multiple places for the same
2270
# values, like seconds. The current code, while more esoteric, is
2271
# cleaner without depending on a parsing library. If Python had a
2272
# built-in library for parsing we would use it, but we'd like to
2273
# avoid excessive use of external libraries.
2274
2275
# New type for defining tokens, syntax, and semantics all-in-one
2276
Token = collections.namedtuple("Token", (
2277
"regexp", # To match token; if "value" is not None, must have
2278
# a "group" containing digits
2279
"value", # datetime.timedelta or None
2280
"followers")) # Tokens valid after this token
2281
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2282
# the "duration" ABNF definition in RFC 3339, Appendix A.
2283
token_end = Token(re.compile(r"$"), None, frozenset())
2284
token_second = Token(re.compile(r"(\d+)S"),
2285
datetime.timedelta(seconds=1),
2286
frozenset((token_end, )))
2287
token_minute = Token(re.compile(r"(\d+)M"),
2288
datetime.timedelta(minutes=1),
2289
frozenset((token_second, token_end)))
2290
token_hour = Token(re.compile(r"(\d+)H"),
2291
datetime.timedelta(hours=1),
2292
frozenset((token_minute, token_end)))
2293
token_time = Token(re.compile(r"T"),
2294
None,
2295
frozenset((token_hour, token_minute,
2296
token_second)))
2297
token_day = Token(re.compile(r"(\d+)D"),
2298
datetime.timedelta(days=1),
2299
frozenset((token_time, token_end)))
2300
token_month = Token(re.compile(r"(\d+)M"),
2301
datetime.timedelta(weeks=4),
2302
frozenset((token_day, token_end)))
2303
token_year = Token(re.compile(r"(\d+)Y"),
2304
datetime.timedelta(weeks=52),
2305
frozenset((token_month, token_end)))
2306
token_week = Token(re.compile(r"(\d+)W"),
2307
datetime.timedelta(weeks=1),
2308
frozenset((token_end, )))
2309
token_duration = Token(re.compile(r"P"), None,
2310
frozenset((token_year, token_month,
2311
token_day, token_time,
2312
token_week)))
2313
# Define starting values
2314
value = datetime.timedelta() # Value so far
2315
found_token = None
2316
followers = frozenset((token_duration, )) # Following valid tokens
2317
s = duration # String left to parse
2318
# Loop until end token is found
2319
while found_token is not token_end:
2320
# Search for any currently valid tokens
2321
for token in followers:
2322
match = token.regexp.match(s)
2323
if match is not None:
2324
# Token found
2325
if token.value is not None:
2326
# Value found, parse digits
2327
factor = int(match.group(1), 10)
2328
# Add to value so far
2329
value += factor * token.value
2330
# Strip token from string
2331
s = token.regexp.sub("", s, 1)
2332
# Go to found token
2333
found_token = token
2334
# Set valid next tokens
2335
followers = found_token.followers
2336
break
2337
else:
2338
# No currently valid tokens were found
2339
raise ValueError("Invalid RFC 3339 duration: {!r}"
2340
.format(duration))
2341
# End token found
2342
return value
546
2343
547
2344
548
2345
def string_to_delta(interval):
549
2346
"""Parse a string and return a datetime.timedelta
550
2347
551
2348
>>> string_to_delta('7d')
552
2349
datetime.timedelta(7)
553
2350
>>> string_to_delta('60s')
556
2353
datetime.timedelta(0, 3600)
557
2354
>>> string_to_delta('24h')
558
2355
datetime.timedelta(1)
559
>>> string_to_delta(u'1w')
2356
>>> string_to_delta('1w')
560
2357
datetime.timedelta(7)
2358
>>> string_to_delta('5m 30s')
2359
datetime.timedelta(0, 330)
561
2360
"""
562
try:
563
suffix=unicode(interval[-1])
564
value=int(interval[:-1])
565
if suffix == u"d":
566
delta = datetime.timedelta(value)
567
elif suffix == u"s":
568
delta = datetime.timedelta(0, value)
569
elif suffix == u"m":
570
delta = datetime.timedelta(0, 0, 0, 0, value)
571
elif suffix == u"h":
572
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
elif suffix == u"w":
574
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
else:
576
raise ValueError
577
except (ValueError, IndexError):
578
raise ValueError
579
return delta
580
581
582
def server_state_changed(state):
583
"""Derived from the Avahi example code"""
584
if state == avahi.SERVER_COLLISION:
585
logger.warning(u"Server name collision")
586
service.remove()
587
elif state == avahi.SERVER_RUNNING:
588
service.add()
589
590
591
def entry_group_state_changed(state, error):
592
"""Derived from the Avahi example code"""
593
logger.debug(u"state change: %i", state)
594
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
logger.debug(u"Service established.")
597
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
600
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
604
605
def if_nametoindex(interface):
606
"""Call the C function if_nametoindex(), or equivalent"""
607
global if_nametoindex
608
try:
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
613
except (OSError, AttributeError):
614
if "struct" not in sys.modules:
615
import struct
616
if "fcntl" not in sys.modules:
617
import fcntl
618
def if_nametoindex(interface):
619
"Get an interface index the hard way, i.e. using fcntl()"
620
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
626
return interface_index
627
return if_nametoindex(interface)
628
629
630
def daemon(nochdir, noclose):
2361
2362
try:
2363
return rfc3339_duration_to_delta(interval)
2364
except ValueError:
2365
pass
2366
2367
timevalue = datetime.timedelta(0)
2368
for s in interval.split():
2369
try:
2370
suffix = s[-1]
2371
value = int(s[:-1])
2372
if suffix == "d":
2373
delta = datetime.timedelta(value)
2374
elif suffix == "s":
2375
delta = datetime.timedelta(0, value)
2376
elif suffix == "m":
2377
delta = datetime.timedelta(0, 0, 0, 0, value)
2378
elif suffix == "h":
2379
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2380
elif suffix == "w":
2381
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2382
else:
2383
raise ValueError("Unknown suffix {!r}".format(suffix))
2384
except IndexError as e:
2385
raise ValueError(*(e.args))
2386
timevalue += delta
2387
return timevalue
2388
2389
2390
def daemon(nochdir = False, noclose = False):
631
2391
"""See daemon(3). Standard BSD Unix function.
2392
632
2393
This should really exist as os.daemon, but it doesn't (yet)."""
633
2394
if os.fork():
634
2395
sys.exit()
635
2396
os.setsid()
636
2397
if not nochdir:
637
2398
os.chdir("/")
2399
if os.fork():
2400
sys.exit()
638
2401
if not noclose:
639
2402
# Close all standard open file descriptors
640
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2403
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
641
2404
if not stat.S_ISCHR(os.fstat(null).st_mode):
642
2405
raise OSError(errno.ENODEV,
643
"/dev/null not a character device")
2406
"{} not a character device"
2407
.format(os.devnull))
644
2408
os.dup2(null, sys.stdin.fileno())
645
2409
os.dup2(null, sys.stdout.fileno())
646
2410
os.dup2(null, sys.stderr.fileno())
649
2413
650
2414
651
2415
def main():
652
global main_loop_started
653
main_loop_started = False
654
655
parser = OptionParser()
656
parser.add_option("-i", "--interface", type="string",
657
metavar="IF", help="Bind to interface IF")
658
parser.add_option("-a", "--address", type="string",
659
help="Address to listen for requests on")
660
parser.add_option("-p", "--port", type="int",
661
help="Port number to receive requests on")
662
parser.add_option("--check", action="store_true", default=False,
663
help="Run self-test")
664
parser.add_option("--debug", action="store_true", default=False,
665
help="Debug mode; run in foreground and log to"
666
" terminal")
667
parser.add_option("--priority", type="string", help="GnuTLS"
668
" priority string (see GnuTLS documentation)")
669
parser.add_option("--servicename", type="string", metavar="NAME",
670
help="Zeroconf service name")
671
parser.add_option("--configdir", type="string",
672
default="/etc/mandos", metavar="DIR",
673
help="Directory to search for configuration"
674
" files")
675
(options, args) = parser.parse_args()
2416
2417
##################################################################
2418
# Parsing of options, both command line and config file
2419
2420
parser = argparse.ArgumentParser()
2421
parser.add_argument("-v", "--version", action="version",
2422
version = "%(prog)s {}".format(version),
2423
help="show version number and exit")
2424
parser.add_argument("-i", "--interface", metavar="IF",
2425
help="Bind to interface IF")
2426
parser.add_argument("-a", "--address",
2427
help="Address to listen for requests on")
2428
parser.add_argument("-p", "--port", type=int,
2429
help="Port number to receive requests on")
2430
parser.add_argument("--check", action="store_true",
2431
help="Run self-test")
2432
parser.add_argument("--debug", action="store_true",
2433
help="Debug mode; run in foreground and log"
2434
" to terminal", default=None)
2435
parser.add_argument("--debuglevel", metavar="LEVEL",
2436
help="Debug level for stdout output")
2437
parser.add_argument("--priority", help="GnuTLS"
2438
" priority string (see GnuTLS documentation)")
2439
parser.add_argument("--servicename",
2440
metavar="NAME", help="Zeroconf service name")
2441
parser.add_argument("--configdir",
2442
default="/etc/mandos", metavar="DIR",
2443
help="Directory to search for configuration"
2444
" files")
2445
parser.add_argument("--no-dbus", action="store_false",
2446
dest="use_dbus", help="Do not provide D-Bus"
2447
" system bus interface", default=None)
2448
parser.add_argument("--no-ipv6", action="store_false",
2449
dest="use_ipv6", help="Do not use IPv6",
2450
default=None)
2451
parser.add_argument("--no-restore", action="store_false",
2452
dest="restore", help="Do not restore stored"
2453
" state", default=None)
2454
parser.add_argument("--socket", type=int,
2455
help="Specify a file descriptor to a network"
2456
" socket to use instead of creating one")
2457
parser.add_argument("--statedir", metavar="DIR",
2458
help="Directory to save/restore state in")
2459
parser.add_argument("--foreground", action="store_true",
2460
help="Run in foreground", default=None)
2461
parser.add_argument("--no-zeroconf", action="store_false",
2462
dest="zeroconf", help="Do not use Zeroconf",
2463
default=None)
2464
2465
options = parser.parse_args()
676
2466
677
2467
if options.check:
678
2468
import doctest
679
doctest.testmod()
680
sys.exit()
2469
fail_count, test_count = doctest.testmod()
2470
sys.exit(os.EX_OK if fail_count == 0 else 1)
681
2471
682
2472
# Default values for config file for server-global settings
683
2473
server_defaults = { "interface": "",
685
2475
"port": "",
686
2476
"debug": "False",
687
2477
"priority":
688
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2478
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2479
":+SIGN-DSA-SHA256",
689
2480
"servicename": "Mandos",
690
}
2481
"use_dbus": "True",
2482
"use_ipv6": "True",
2483
"debuglevel": "",
2484
"restore": "True",
2485
"socket": "",
2486
"statedir": "/var/lib/mandos",
2487
"foreground": "False",
2488
"zeroconf": "True",
2489
}
691
2490
692
2491
# Parse config file for server-global settings
693
server_config = ConfigParser.SafeConfigParser(server_defaults)
2492
server_config = configparser.SafeConfigParser(server_defaults)
694
2493
del server_defaults
695
server_config.read(os.path.join(options.configdir, "server.conf"))
696
server_section = "server"
2494
server_config.read(os.path.join(options.configdir, "mandos.conf"))
697
2495
# Convert the SafeConfigParser object to a dict
698
server_settings = dict(server_config.items(server_section))
699
# Use getboolean on the boolean config option
700
server_settings["debug"] = server_config.getboolean\
701
(server_section, "debug")
2496
server_settings = server_config.defaults()
2497
# Use the appropriate methods on the non-string config options
2498
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2499
server_settings[option] = server_config.getboolean("DEFAULT",
2500
option)
2501
if server_settings["port"]:
2502
server_settings["port"] = server_config.getint("DEFAULT",
2503
"port")
2504
if server_settings["socket"]:
2505
server_settings["socket"] = server_config.getint("DEFAULT",
2506
"socket")
2507
# Later, stdin will, and stdout and stderr might, be dup'ed
2508
# over with an opened os.devnull. But we don't want this to
2509
# happen with a supplied network socket.
2510
if 0 <= server_settings["socket"] <= 2:
2511
server_settings["socket"] = os.dup(server_settings
2512
["socket"])
702
2513
del server_config
703
2514
704
2515
# Override the settings from the config file with command line
705
2516
# options, if set.
706
2517
for option in ("interface", "address", "port", "debug",
707
"priority", "servicename", "configdir"):
2518
"priority", "servicename", "configdir", "use_dbus",
2519
"use_ipv6", "debuglevel", "restore", "statedir",
2520
"socket", "foreground", "zeroconf"):
708
2521
value = getattr(options, option)
709
2522
if value is not None:
710
2523
server_settings[option] = value
711
2524
del options
2525
# Force all strings to be unicode
2526
for option in server_settings.keys():
2527
if isinstance(server_settings[option], bytes):
2528
server_settings[option] = (server_settings[option]
2529
.decode("utf-8"))
2530
# Force all boolean options to be boolean
2531
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2532
"foreground", "zeroconf"):
2533
server_settings[option] = bool(server_settings[option])
2534
# Debug implies foreground
2535
if server_settings["debug"]:
2536
server_settings["foreground"] = True
712
2537
# Now we have our good server settings in "server_settings"
713
2538
2539
##################################################################
2540
2541
if (not server_settings["zeroconf"]
2542
and not (server_settings["port"]
2543
or server_settings["socket"] != "")):
2544
parser.error("Needs port or socket to work without Zeroconf")
2545
2546
# For convenience
2547
debug = server_settings["debug"]
2548
debuglevel = server_settings["debuglevel"]
2549
use_dbus = server_settings["use_dbus"]
2550
use_ipv6 = server_settings["use_ipv6"]
2551
stored_state_path = os.path.join(server_settings["statedir"],
2552
stored_state_file)
2553
foreground = server_settings["foreground"]
2554
zeroconf = server_settings["zeroconf"]
2555
2556
if debug:
2557
initlogger(debug, logging.DEBUG)
2558
else:
2559
if not debuglevel:
2560
initlogger(debug)
2561
else:
2562
level = getattr(logging, debuglevel.upper())
2563
initlogger(debug, level)
2564
2565
if server_settings["servicename"] != "Mandos":
2566
syslogger.setFormatter(
2567
logging.Formatter('Mandos ({}) [%(process)d]:'
2568
' %(levelname)s: %(message)s'.format(
2569
server_settings["servicename"])))
2570
714
2571
# Parse config file with clients
715
client_defaults = { "timeout": "1h",
716
"interval": "5m",
717
"checker": "fping -q -- %%(fqdn)s",
718
}
719
client_config = ConfigParser.SafeConfigParser(client_defaults)
2572
client_config = configparser.SafeConfigParser(Client
2573
.client_defaults)
720
2574
client_config.read(os.path.join(server_settings["configdir"],
721
2575
"clients.conf"))
722
2576
723
global service
724
service = AvahiService(name = server_settings["servicename"],
725
type = "_mandos._tcp", );
726
if server_settings["interface"]:
727
service.interface = if_nametoindex(server_settings["interface"])
2577
global mandos_dbus_service
2578
mandos_dbus_service = None
2579
2580
socketfd = None
2581
if server_settings["socket"] != "":
2582
socketfd = server_settings["socket"]
2583
tcp_server = MandosServer(
2584
(server_settings["address"], server_settings["port"]),
2585
ClientHandler,
2586
interface=(server_settings["interface"] or None),
2587
use_ipv6=use_ipv6,
2588
gnutls_priority=server_settings["priority"],
2589
use_dbus=use_dbus,
2590
socketfd=socketfd)
2591
if not foreground:
2592
pidfilename = "/run/mandos.pid"
2593
if not os.path.isdir("/run/."):
2594
pidfilename = "/var/run/mandos.pid"
2595
pidfile = None
2596
try:
2597
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2598
except IOError as e:
2599
logger.error("Could not open file %r", pidfilename,
2600
exc_info=e)
2601
2602
for name in ("_mandos", "mandos", "nobody"):
2603
try:
2604
uid = pwd.getpwnam(name).pw_uid
2605
gid = pwd.getpwnam(name).pw_gid
2606
break
2607
except KeyError:
2608
continue
2609
else:
2610
uid = 65534
2611
gid = 65534
2612
try:
2613
os.setgid(gid)
2614
os.setuid(uid)
2615
except OSError as error:
2616
if error.errno != errno.EPERM:
2617
raise
2618
2619
if debug:
2620
# Enable all possible GnuTLS debugging
2621
2622
# "Use a log level over 10 to enable all debugging options."
2623
# - GnuTLS manual
2624
gnutls.library.functions.gnutls_global_set_log_level(11)
2625
2626
@gnutls.library.types.gnutls_log_func
2627
def debug_gnutls(level, string):
2628
logger.debug("GnuTLS: %s", string[:-1])
2629
2630
gnutls.library.functions.gnutls_global_set_log_function(
2631
debug_gnutls)
2632
2633
# Redirect stdin so all checkers get /dev/null
2634
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2635
os.dup2(null, sys.stdin.fileno())
2636
if null > 2:
2637
os.close(null)
2638
2639
# Need to fork before connecting to D-Bus
2640
if not foreground:
2641
# Close all input and output, do double fork, etc.
2642
daemon()
2643
2644
# multiprocessing will use threads, so before we use gobject we
2645
# need to inform gobject that threads will be used.
2646
gobject.threads_init()
728
2647
729
2648
global main_loop
730
global bus
731
global server
732
2649
# From the Avahi example code
733
DBusGMainLoop(set_as_default=True )
2650
DBusGMainLoop(set_as_default=True)
734
2651
main_loop = gobject.MainLoop()
735
2652
bus = dbus.SystemBus()
736
server = dbus.Interface(
737
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
738
avahi.DBUS_INTERFACE_SERVER )
739
2653
# End of Avahi example code
740
741
debug = server_settings["debug"]
742
743
if debug:
744
console = logging.StreamHandler()
745
# console.setLevel(logging.DEBUG)
746
console.setFormatter(logging.Formatter\
747
('%(levelname)s: %(message)s'))
748
logger.addHandler(console)
749
del console
750
751
clients = Set()
752
def remove_from_clients(client):
753
clients.remove(client)
754
if not clients:
755
logger.debug(u"No clients left, exiting")
756
sys.exit()
757
758
clients.update(Set(Client(name=section,
759
stop_hook = remove_from_clients,
760
**(dict(client_config\
761
.items(section))))
762
for section in client_config.sections()))
763
764
if not debug:
765
daemon(False, False)
2654
if use_dbus:
2655
try:
2656
bus_name = dbus.service.BusName("se.recompile.Mandos",
2657
bus,
2658
do_not_queue=True)
2659
old_bus_name = dbus.service.BusName(
2660
"se.bsnet.fukt.Mandos", bus,
2661
do_not_queue=True)
2662
except dbus.exceptions.DBusException as e:
2663
logger.error("Disabling D-Bus:", exc_info=e)
2664
use_dbus = False
2665
server_settings["use_dbus"] = False
2666
tcp_server.use_dbus = False
2667
if zeroconf:
2668
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2669
service = AvahiServiceToSyslog(
2670
name = server_settings["servicename"],
2671
servicetype = "_mandos._tcp",
2672
protocol = protocol,
2673
bus = bus)
2674
if server_settings["interface"]:
2675
service.interface = if_nametoindex(
2676
server_settings["interface"].encode("utf-8"))
2677
2678
global multiprocessing_manager
2679
multiprocessing_manager = multiprocessing.Manager()
2680
2681
client_class = Client
2682
if use_dbus:
2683
client_class = functools.partial(ClientDBus, bus = bus)
2684
2685
client_settings = Client.config_parser(client_config)
2686
old_client_settings = {}
2687
clients_data = {}
2688
2689
# This is used to redirect stdout and stderr for checker processes
2690
global wnull
2691
wnull = open(os.devnull, "w") # A writable /dev/null
2692
# Only used if server is running in foreground but not in debug
2693
# mode
2694
if debug or not foreground:
2695
wnull.close()
2696
2697
# Get client data and settings from last running state.
2698
if server_settings["restore"]:
2699
try:
2700
with open(stored_state_path, "rb") as stored_state:
2701
clients_data, old_client_settings = pickle.load(
2702
stored_state)
2703
os.remove(stored_state_path)
2704
except IOError as e:
2705
if e.errno == errno.ENOENT:
2706
logger.warning("Could not load persistent state:"
2707
" {}".format(os.strerror(e.errno)))
2708
else:
2709
logger.critical("Could not load persistent state:",
2710
exc_info=e)
2711
raise
2712
except EOFError as e:
2713
logger.warning("Could not load persistent state: "
2714
"EOFError:",
2715
exc_info=e)
2716
2717
with PGPEngine() as pgp:
2718
for client_name, client in clients_data.items():
2719
# Skip removed clients
2720
if client_name not in client_settings:
2721
continue
2722
2723
# Decide which value to use after restoring saved state.
2724
# We have three different values: Old config file,
2725
# new config file, and saved state.
2726
# New config value takes precedence if it differs from old
2727
# config value, otherwise use saved state.
2728
for name, value in client_settings[client_name].items():
2729
try:
2730
# For each value in new config, check if it
2731
# differs from the old config value (Except for
2732
# the "secret" attribute)
2733
if (name != "secret"
2734
and (value !=
2735
old_client_settings[client_name][name])):
2736
client[name] = value
2737
except KeyError:
2738
pass
2739
2740
# Clients who has passed its expire date can still be
2741
# enabled if its last checker was successful. A Client
2742
# whose checker succeeded before we stored its state is
2743
# assumed to have successfully run all checkers during
2744
# downtime.
2745
if client["enabled"]:
2746
if datetime.datetime.utcnow() >= client["expires"]:
2747
if not client["last_checked_ok"]:
2748
logger.warning(
2749
"disabling client {} - Client never "
2750
"performed a successful checker".format(
2751
client_name))
2752
client["enabled"] = False
2753
elif client["last_checker_status"] != 0:
2754
logger.warning(
2755
"disabling client {} - Client last"
2756
" checker failed with error code"
2757
" {}".format(
2758
client_name,
2759
client["last_checker_status"]))
2760
client["enabled"] = False
2761
else:
2762
client["expires"] = (
2763
datetime.datetime.utcnow()
2764
+ client["timeout"])
2765
logger.debug("Last checker succeeded,"
2766
" keeping {} enabled".format(
2767
client_name))
2768
try:
2769
client["secret"] = pgp.decrypt(
2770
client["encrypted_secret"],
2771
client_settings[client_name]["secret"])
2772
except PGPError:
2773
# If decryption fails, we use secret from new settings
2774
logger.debug("Failed to decrypt {} old secret".format(
2775
client_name))
2776
client["secret"] = (client_settings[client_name]
2777
["secret"])
2778
2779
# Add/remove clients based on new changes made to config
2780
for client_name in (set(old_client_settings)
2781
- set(client_settings)):
2782
del clients_data[client_name]
2783
for client_name in (set(client_settings)
2784
- set(old_client_settings)):
2785
clients_data[client_name] = client_settings[client_name]
2786
2787
# Create all client objects
2788
for client_name, client in clients_data.items():
2789
tcp_server.clients[client_name] = client_class(
2790
name = client_name,
2791
settings = client,
2792
server_settings = server_settings)
2793
2794
if not tcp_server.clients:
2795
logger.warning("No clients defined")
2796
2797
if not foreground:
2798
if pidfile is not None:
2799
pid = os.getpid()
2800
try:
2801
with pidfile:
2802
print(pid, file=pidfile)
2803
except IOError:
2804
logger.error("Could not write to file %r with PID %d",
2805
pidfilename, pid)
2806
del pidfile
2807
del pidfilename
2808
2809
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2810
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2811
2812
if use_dbus:
2813
2814
@alternate_dbus_interfaces(
2815
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2816
class MandosDBusService(DBusObjectWithAnnotations):
2817
"""A D-Bus proxy object"""
2818
2819
def __init__(self):
2820
dbus.service.Object.__init__(self, bus, "/")
2821
2822
_interface = "se.recompile.Mandos"
2823
2824
@dbus.service.signal(_interface, signature="o")
2825
def ClientAdded(self, objpath):
2826
"D-Bus signal"
2827
pass
2828
2829
@dbus.service.signal(_interface, signature="ss")
2830
def ClientNotFound(self, fingerprint, address):
2831
"D-Bus signal"
2832
pass
2833
2834
@dbus.service.signal(_interface, signature="os")
2835
def ClientRemoved(self, objpath, name):
2836
"D-Bus signal"
2837
pass
2838
2839
@dbus.service.method(_interface, out_signature="ao")
2840
def GetAllClients(self):
2841
"D-Bus method"
2842
return dbus.Array(c.dbus_object_path for c in
2843
tcp_server.clients.itervalues())
2844
2845
@dbus.service.method(_interface,
2846
out_signature="a{oa{sv}}")
2847
def GetAllClientsWithProperties(self):
2848
"D-Bus method"
2849
return dbus.Dictionary(
2850
{ c.dbus_object_path: c.GetAll("")
2851
for c in tcp_server.clients.itervalues() },
2852
signature="oa{sv}")
2853
2854
@dbus.service.method(_interface, in_signature="o")
2855
def RemoveClient(self, object_path):
2856
"D-Bus method"
2857
for c in tcp_server.clients.itervalues():
2858
if c.dbus_object_path == object_path:
2859
del tcp_server.clients[c.name]
2860
c.remove_from_connection()
2861
# Don't signal anything except ClientRemoved
2862
c.disable(quiet=True)
2863
# Emit D-Bus signal
2864
self.ClientRemoved(object_path, c.name)
2865
return
2866
raise KeyError(object_path)
2867
2868
del _interface
2869
2870
mandos_dbus_service = MandosDBusService()
766
2871
767
2872
def cleanup():
768
2873
"Cleanup function; run on exit"
769
global group
770
# From the Avahi example code
771
if not group is None:
772
group.Free()
773
group = None
774
# End of Avahi example code
775
776
while clients:
777
client = clients.pop()
778
client.stop_hook = None
779
client.stop()
2874
if zeroconf:
2875
service.cleanup()
2876
2877
multiprocessing.active_children()
2878
wnull.close()
2879
if not (tcp_server.clients or client_settings):
2880
return
2881
2882
# Store client before exiting. Secrets are encrypted with key
2883
# based on what config file has. If config file is
2884
# removed/edited, old secret will thus be unrecovable.
2885
clients = {}
2886
with PGPEngine() as pgp:
2887
for client in tcp_server.clients.itervalues():
2888
key = client_settings[client.name]["secret"]
2889
client.encrypted_secret = pgp.encrypt(client.secret,
2890
key)
2891
client_dict = {}
2892
2893
# A list of attributes that can not be pickled
2894
# + secret.
2895
exclude = { "bus", "changedstate", "secret",
2896
"checker", "server_settings" }
2897
for name, typ in inspect.getmembers(dbus.service
2898
.Object):
2899
exclude.add(name)
2900
2901
client_dict["encrypted_secret"] = (client
2902
.encrypted_secret)
2903
for attr in client.client_structure:
2904
if attr not in exclude:
2905
client_dict[attr] = getattr(client, attr)
2906
2907
clients[client.name] = client_dict
2908
del client_settings[client.name]["secret"]
2909
2910
try:
2911
with tempfile.NamedTemporaryFile(
2912
mode='wb',
2913
suffix=".pickle",
2914
prefix='clients-',
2915
dir=os.path.dirname(stored_state_path),
2916
delete=False) as stored_state:
2917
pickle.dump((clients, client_settings), stored_state)
2918
tempname = stored_state.name
2919
os.rename(tempname, stored_state_path)
2920
except (IOError, OSError) as e:
2921
if not debug:
2922
try:
2923
os.remove(tempname)
2924
except NameError:
2925
pass
2926
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2927
logger.warning("Could not save persistent state: {}"
2928
.format(os.strerror(e.errno)))
2929
else:
2930
logger.warning("Could not save persistent state:",
2931
exc_info=e)
2932
raise
2933
2934
# Delete all clients, and settings from config
2935
while tcp_server.clients:
2936
name, client = tcp_server.clients.popitem()
2937
if use_dbus:
2938
client.remove_from_connection()
2939
# Don't signal anything except ClientRemoved
2940
client.disable(quiet=True)
2941
if use_dbus:
2942
# Emit D-Bus signal
2943
mandos_dbus_service.ClientRemoved(
2944
client.dbus_object_path, client.name)
2945
client_settings.clear()
780
2946
781
2947
atexit.register(cleanup)
782
2948
783
if not debug:
784
signal.signal(signal.SIGINT, signal.SIG_IGN)
785
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
786
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
787
788
for client in clients:
789
client.start()
790
791
tcp_server = IPv6_TCPServer((server_settings["address"],
792
server_settings["port"]),
793
tcp_handler,
794
settings=server_settings,
795
clients=clients)
2949
for client in tcp_server.clients.itervalues():
2950
if use_dbus:
2951
# Emit D-Bus signal
2952
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2953
# Need to initiate checking of clients
2954
if client.enabled:
2955
client.init_checker()
2956
2957
tcp_server.enable()
2958
tcp_server.server_activate()
2959
796
2960
# Find out what port we got
797
service.port = tcp_server.socket.getsockname()[1]
798
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
799
u" scope_id %d" % tcp_server.socket.getsockname())
2961
if zeroconf:
2962
service.port = tcp_server.socket.getsockname()[1]
2963
if use_ipv6:
2964
logger.info("Now listening on address %r, port %d,"
2965
" flowinfo %d, scope_id %d",
2966
*tcp_server.socket.getsockname())
2967
else: # IPv4
2968
logger.info("Now listening on address %r, port %d",
2969
*tcp_server.socket.getsockname())
800
2970
801
2971
#service.interface = tcp_server.socket.getsockname()[3]
802
2972
803
2973
try:
804
# From the Avahi example code
805
server.connect_to_signal("StateChanged", server_state_changed)
806
try:
807
server_state_changed(server.GetState())
808
except dbus.exceptions.DBusException, error:
809
logger.critical(u"DBusException: %s", error)
810
sys.exit(1)
811
# End of Avahi example code
2974
if zeroconf:
2975
# From the Avahi example code
2976
try:
2977
service.activate()
2978
except dbus.exceptions.DBusException as error:
2979
logger.critical("D-Bus Exception", exc_info=error)
2980
cleanup()
2981
sys.exit(1)
2982
# End of Avahi example code
812
2983
813
2984
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
814
2985
lambda *args, **kwargs:
815
tcp_server.handle_request\
816
(*args[2:], **kwargs) or True)
2986
(tcp_server.handle_request
2987
(*args[2:], **kwargs) or True))
817
2988
818
2989
logger.debug("Starting main loop")
819
main_loop_started = True
820
2990
main_loop.run()
821
except AvahiError, error:
822
logger.critical(u"AvahiError: %s" + unicode(error))
2991
except AvahiError as error:
2992
logger.critical("Avahi Error", exc_info=error)
2993
cleanup()
823
2994
sys.exit(1)
824
2995
except KeyboardInterrupt:
825
2996
if debug:
826
print
2997
print("", file=sys.stderr)
2998
logger.debug("Server received KeyboardInterrupt")
2999
logger.debug("Server exiting")
3000
# Must run before the D-Bus bus name gets deregistered
3001
cleanup()
3002
827
3003
828
3004
if __name__ == '__main__':
829
3005
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0