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- Committer: Teddy Hogeborn
- Date: 2011-03-08 19:12:56 UTC
- mfrom: (237.7.20 trunk)
- Revision ID: teddy@fukt.bsnet.se-20110308191256-mjcukty9on3z0yhd
Merge from trunk.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
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#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
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#
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# Mandos server - give out binary blobs to connecting clients.
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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from future_builtins import *
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import SocketServer as socketserver
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import socket
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import argparse
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import optparse
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import datetime
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import errno
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import gnutls.crypto
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import functools
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import cPickle as pickle
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import multiprocessing
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import types
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import binascii
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import tempfile
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import itertools
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import collections
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65
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import dbus
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import dbus.service
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except ImportError:
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SO_BINDTODEVICE = None
90
83
91
if sys.version_info.major == 2:
92
str = unicode
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94
version = "1.6.8"
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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syslogger = None
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100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
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return interface_index
113
114
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def initlogger(debug, level=logging.WARNING):
116
"""init logger and add loglevel"""
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global syslogger
119
syslogger = (logging.handlers.SysLogHandler
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(facility =
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logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(syslogger)
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128
if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
' [%(process)d]:'
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' %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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logger.setLevel(level)
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137
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class PGPError(Exception):
139
"""Exception if encryption/decryption fails"""
140
pass
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142
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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
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def __init__(self):
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gnupgargs = ['--batch',
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'--home', self.tempdir,
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'--force-mdc',
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'--quiet',
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'--no-use-agent']
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def __enter__(self):
154
return self
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156
def __exit__(self, exc_type, exc_value, traceback):
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self._cleanup()
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return False
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160
def __del__(self):
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self._cleanup()
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def _cleanup(self):
164
if self.tempdir is not None:
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# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
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os.remove(os.path.join(root, filename))
170
for dirname in dirs:
171
os.rmdir(os.path.join(root, dirname))
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# Remove tempdir
173
os.rmdir(self.tempdir)
174
self.tempdir = None
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def password_encode(self, password):
177
# Passphrase can not be empty and can not contain newlines or
178
# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
184
.replace(b"\0", b"\\x00"))
185
return encoded
186
187
def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
191
passfile.write(passphrase)
192
passfile.flush()
193
proc = subprocess.Popen(['gpg', '--symmetric',
194
'--passphrase-file',
195
passfile.name]
196
+ self.gnupgargs,
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
203
return ciphertext
204
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def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
212
'--passphrase-file',
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passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
219
= data)
220
if proc.returncode != 0:
221
raise PGPError(err)
222
return decrypted_plaintext
223
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version = "1.2.3"
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#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
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console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
224
102
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103
class AvahiError(Exception):
226
104
def __init__(self, value, *args, **kwargs):
227
105
self.value = value
228
return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
230
109
231
110
class AvahiServiceError(AvahiError):
232
111
pass
243
122
Used to optionally bind to the specified interface.
244
123
name: string; Example: 'Mandos'
245
124
type: string; Example: '_mandos._tcp'.
246
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
247
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port: integer; what port to announce
248
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TXT: list of strings; TXT record for the service
249
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domain: string; Domain to publish on, default to .local if empty.
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server: D-Bus Server
256
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bus: dbus.SystemBus()
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136
"""
258
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
261
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domain = "", host = "", max_renames = 32768,
273
151
self.group = None # our entry group
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self.server = None
275
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self.bus = bus
276
self.entry_group_state_changed_match = None
277
278
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def rename(self):
279
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"""Derived from the Avahi example code"""
280
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if self.rename_count >= self.max_renames:
282
158
" after %i retries, exiting.",
283
159
self.rename_count)
284
160
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
287
162
logger.info("Changing Zeroconf service name to %r ...",
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163
self.name)
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
289
168
self.remove()
290
169
try:
291
170
self.add()
292
except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
294
173
self.cleanup()
295
174
os._exit(1)
296
175
self.rename_count += 1
297
298
176
def remove(self):
299
177
"""Derived from the Avahi example code"""
300
if self.entry_group_state_changed_match is not None:
301
self.entry_group_state_changed_match.remove()
302
self.entry_group_state_changed_match = None
303
178
if self.group is not None:
304
179
self.group.Reset()
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180
def add(self):
307
181
"""Derived from the Avahi example code"""
308
self.remove()
309
182
if self.group is None:
310
183
self.group = dbus.Interface(
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184
self.bus.get_object(avahi.DBUS_NAME,
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185
self.server.EntryGroupNew()),
313
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
self.entry_group_state_changed_match = (
315
self.group.connect_to_signal(
316
'StateChanged', self.entry_group_state_changed))
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
317
190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
191
self.name, self.type)
319
192
self.group.AddService(
325
198
dbus.UInt16(self.port),
326
199
avahi.string_array_to_txt_array(self.TXT))
327
200
self.group.Commit()
328
329
201
def entry_group_state_changed(self, state, error):
330
202
"""Derived from the Avahi example code"""
331
203
logger.debug("Avahi entry group state change: %i", state)
337
209
self.rename()
338
210
elif state == avahi.ENTRY_GROUP_FAILURE:
339
211
logger.critical("Avahi: Error in group state changed %s",
340
str(error))
341
raise AvahiGroupError("State changed: {!s}"
342
.format(error))
343
212
unicode(error))
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
344
215
def cleanup(self):
345
216
"""Derived from the Avahi example code"""
346
217
if self.group is not None:
347
try:
348
self.group.Free()
349
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
351
pass
218
self.group.Free()
352
219
self.group = None
353
self.remove()
354
355
def server_state_changed(self, state, error=None):
220
def server_state_changed(self, state):
356
221
"""Derived from the Avahi example code"""
357
222
logger.debug("Avahi server state change: %i", state)
358
bad_states = { avahi.SERVER_INVALID:
359
"Zeroconf server invalid",
360
avahi.SERVER_REGISTERING: None,
361
avahi.SERVER_COLLISION:
362
"Zeroconf server name collision",
363
avahi.SERVER_FAILURE:
364
"Zeroconf server failure" }
365
if state in bad_states:
366
if bad_states[state] is not None:
367
if error is None:
368
logger.error(bad_states[state])
369
else:
370
logger.error(bad_states[state] + ": %r", error)
371
self.cleanup()
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
372
226
elif state == avahi.SERVER_RUNNING:
373
227
self.add()
374
else:
375
if error is None:
376
logger.debug("Unknown state: %r", state)
377
else:
378
logger.debug("Unknown state: %r: %r", state, error)
379
380
228
def activate(self):
381
229
"""Derived from the Avahi example code"""
382
230
if self.server is None:
383
231
self.server = dbus.Interface(
384
232
self.bus.get_object(avahi.DBUS_NAME,
385
avahi.DBUS_PATH_SERVER,
386
follow_name_owner_changes=True),
233
avahi.DBUS_PATH_SERVER),
387
234
avahi.DBUS_INTERFACE_SERVER)
388
235
self.server.connect_to_signal("StateChanged",
389
236
self.server_state_changed)
390
237
self.server_state_changed(self.server.GetState())
391
238
392
239
393
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
401
return ret
402
403
404
240
class Client(object):
405
241
"""A representation of a client host served by this server.
406
242
407
243
Attributes:
408
approved: bool(); 'None' if not yet approved/disapproved
244
_approved: bool(); 'None' if not yet approved/disapproved
409
245
approval_delay: datetime.timedelta(); Time to wait for approval
410
246
approval_duration: datetime.timedelta(); Duration of one approval
411
247
checker: subprocess.Popen(); a running checker process used
418
254
instance %(name)s can be used in the command.
419
255
checker_initiator_tag: a gobject event source tag, or None
420
256
created: datetime.datetime(); (UTC) object creation
421
client_structure: Object describing what attributes a client has
422
and is used for storing the client at exit
423
257
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
424
259
disable_initiator_tag: a gobject event source tag, or None
425
260
enabled: bool()
426
261
fingerprint: string (40 or 32 hexadecimal digits); used to
429
264
interval: datetime.timedelta(); How often to start a new checker
430
265
last_approval_request: datetime.datetime(); (UTC) or None
431
266
last_checked_ok: datetime.datetime(); (UTC) or None
432
last_checker_status: integer between 0 and 255 reflecting exit
433
status of last checker. -1 reflects crashed
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
436
268
name: string; from the config file, used in log messages and
437
269
D-Bus identifiers
438
270
secret: bytestring; sent verbatim (over TLS) to client
439
271
timeout: datetime.timedelta(); How long from last_checked_ok
440
272
until this client is disabled
441
extended_timeout: extra long timeout when secret has been sent
442
273
runtime_expansions: Allowed attributes for runtime expansion.
443
expires: datetime.datetime(); time (UTC) when a client will be
444
disabled, or None
445
server_settings: The server_settings dict from main()
446
274
"""
447
275
448
276
runtime_expansions = ("approval_delay", "approval_duration",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
452
279
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
455
"interval": "PT2M",
456
"checker": "fping -q -- %%(host)s",
457
"host": "",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
461
"enabled": "True",
462
}
463
280
464
281
@staticmethod
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
471
"""
472
settings = {}
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
476
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
482
"enabled")
483
484
client["fingerprint"] = (section["fingerprint"].upper()
485
.replace(" ", ""))
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
491
"rb") as secfile:
492
client["secret"] = secfile.read()
493
else:
494
raise TypeError("No secret or secfile for section {}"
495
.format(section))
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
508
509
return settings
510
511
def __init__(self, settings, name = None, server_settings=None):
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
287
288
def timeout_milliseconds(self):
289
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
291
292
def interval_milliseconds(self):
293
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
296
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
512
303
self.name = name
513
if server_settings is None:
514
server_settings = {}
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
519
520
if self.enabled:
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
525
+ self.timeout)
526
else:
527
self.last_enabled = None
528
self.expires = None
529
304
if config is None:
305
config = {}
530
306
logger.debug("Creating client %r", self.name)
531
307
# Uppercase and remove spaces from fingerprint for later
532
308
# comparison purposes with return value from the fingerprint()
533
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
534
312
logger.debug(" Fingerprint: %s", self.fingerprint)
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
537
538
# attributes specific for this server instance
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
539
332
self.checker = None
540
333
self.checker_initiator_tag = None
541
334
self.disable_initiator_tag = None
542
335
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
543
337
self.current_checker_command = None
544
self.approved = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
545
342
self.approvals_pending = 0
546
self.changedstate = (multiprocessing_manager
547
.Condition(multiprocessing_manager
548
.Lock()))
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
551
if not attr.startswith("_")]
552
self.client_structure.append("client_structure")
553
554
for name, t in inspect.getmembers(type(self),
555
lambda obj:
556
isinstance(obj,
557
property)):
558
if not name.startswith("_"):
559
self.client_structure.append(name)
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
560
348
561
# Send notice to process children that client state has changed
562
349
def send_changedstate(self):
563
with self.changedstate:
564
self.changedstate.notify_all()
565
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
566
354
def enable(self):
567
355
"""Start this client's checker and timeout hooks"""
568
356
if getattr(self, "enabled", False):
569
357
# Already enabled
570
358
return
571
self.expires = datetime.datetime.utcnow() + self.timeout
572
self.enabled = True
359
self.send_changedstate()
573
360
self.last_enabled = datetime.datetime.utcnow()
574
self.init_checker()
575
self.send_changedstate()
361
# Schedule a new checker to be started an 'interval' from now,
362
# and every interval from then on.
363
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
365
self.start_checker))
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
369
self.disable))
370
self.enabled = True
371
# Also start a new checker *right now*.
372
self.start_checker()
576
373
577
374
def disable(self, quiet=True):
578
375
"""Disable this client."""
579
376
if not getattr(self, "enabled", False):
580
377
return False
581
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
582
381
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", None) is not None:
382
if getattr(self, "disable_initiator_tag", False):
584
383
gobject.source_remove(self.disable_initiator_tag)
585
384
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", None) is not None:
385
if getattr(self, "checker_initiator_tag", False):
588
386
gobject.source_remove(self.checker_initiator_tag)
589
387
self.checker_initiator_tag = None
590
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
591
391
self.enabled = False
592
if not quiet:
593
self.send_changedstate()
594
392
# Do not run this again if called by a gobject.timeout_add
595
393
return False
596
394
597
395
def __del__(self):
396
self.disable_hook = None
598
397
self.disable()
599
398
600
def init_checker(self):
601
# Schedule a new checker to be started an 'interval' from now,
602
# and every interval from then on.
603
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
606
(int(self.interval
607
.total_seconds() * 1000),
608
self.start_checker))
609
# Schedule a disable() when 'timeout' has passed
610
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
613
(int(self.timeout
614
.total_seconds() * 1000),
615
self.disable))
616
# Also start a new checker *right now*.
617
self.start_checker()
618
619
399
def checker_callback(self, pid, condition, command):
620
400
"""The checker has completed, so take appropriate actions."""
621
401
self.checker_callback_tag = None
622
402
self.checker = None
623
403
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
626
406
logger.info("Checker for %(name)s succeeded",
627
407
vars(self))
628
408
self.checked_ok()
630
410
logger.info("Checker for %(name)s failed",
631
411
vars(self))
632
412
else:
633
self.last_checker_status = -1
634
413
logger.warning("Checker for %(name)s crashed?",
635
414
vars(self))
636
415
637
416
def checked_ok(self):
638
"""Assert that the client has been seen, alive and well."""
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
639
422
self.last_checked_ok = datetime.datetime.utcnow()
640
self.last_checker_status = 0
641
self.bump_timeout()
642
643
def bump_timeout(self, timeout=None):
644
"""Bump up the timeout for this client."""
645
if timeout is None:
646
timeout = self.timeout
647
if self.disable_initiator_tag is not None:
648
gobject.source_remove(self.disable_initiator_tag)
649
self.disable_initiator_tag = None
650
if getattr(self, "enabled", False):
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
654
self.expires = datetime.datetime.utcnow() + timeout
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
655
427
656
428
def need_approval(self):
657
429
self.last_approval_request = datetime.datetime.utcnow()
662
434
If a checker already exists, leave it running and do
663
435
nothing."""
664
436
# The reason for not killing a running checker is that if we
665
# did that, and if a checker (for some reason) started running
666
# slowly and taking more than 'interval' time, then the client
667
# would inevitably timeout, since no checker would get a
668
# chance to run to completion. If we instead leave running
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
669
441
# checkers alone, the checker would have to take more time
670
442
# than 'timeout' for the client to be disabled, which is as it
671
443
# should be.
673
445
# If a checker exists, make sure it is not a zombie
674
446
try:
675
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
677
pass
678
except OSError as error:
679
if error.errno != errno.ECHILD:
680
raise
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
681
452
else:
682
453
if pid:
683
454
logger.warning("Checker was a zombie")
686
457
self.current_checker_command)
687
458
# Start a new checker if needed
688
459
if self.checker is None:
689
# Escape attributes for the shell
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
693
460
try:
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
698
return True # Try again later
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
699
479
self.current_checker_command = command
700
480
try:
701
481
logger.info("Starting checker %r for %s",
704
484
# in normal mode, that is already done by daemon(),
705
485
# and in debug mode we don't want to. (Stdin is
706
486
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
709
# created wnull.
710
popen_args = {}
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
714
"stderr": wnull })
715
487
self.checker = subprocess.Popen(command,
716
488
close_fds=True,
717
shell=True, cwd="/",
718
**popen_args)
719
except OSError as error:
720
logger.error("Failed to start subprocess",
721
exc_info=error)
722
return True
723
self.checker_callback_tag = (gobject.child_watch_add
724
(self.checker.pid,
725
self.checker_callback,
726
data=command))
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
729
try:
489
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
730
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
735
exc_info=error)
736
return True
737
raise
738
if pid:
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
741
503
# Re-run this periodically if run by gobject.timeout_add
742
504
return True
743
505
750
512
return
751
513
logger.debug("Stopping checker for %(name)s", vars(self))
752
514
try:
753
self.checker.terminate()
515
os.kill(self.checker.pid, signal.SIGTERM)
754
516
#time.sleep(0.5)
755
517
#if self.checker.poll() is None:
756
# self.checker.kill()
757
except OSError as error:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
758
520
if error.errno != errno.ESRCH: # No such process
759
521
raise
760
522
self.checker = None
761
523
762
763
524
def dbus_service_property(dbus_interface, signature="v",
764
525
access="readwrite", byte_arrays=False):
765
526
"""Decorators for marking methods of a DBusObjectWithProperties to
776
537
# "Set" method, so we fail early here:
777
538
if byte_arrays and signature != "ay":
778
539
raise ValueError("Byte arrays not supported for non-'ay'"
779
" signature {!r}".format(signature))
540
" signature %r" % signature)
780
541
def decorator(func):
781
542
func._dbus_is_property = True
782
543
func._dbus_interface = dbus_interface
790
551
return decorator
791
552
792
553
793
def dbus_interface_annotations(dbus_interface):
794
"""Decorator for marking functions returning interface annotations
795
796
Usage:
797
798
@dbus_interface_annotations("org.example.Interface")
799
def _foo(self): # Function name does not matter
800
return {"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property.EmitsChangedSignal":
802
"false"}
803
"""
804
def decorator(func):
805
func._dbus_is_interface = True
806
func._dbus_interface = dbus_interface
807
func._dbus_name = dbus_interface
808
return func
809
return decorator
810
811
812
def dbus_annotations(annotations):
813
"""Decorator to annotate D-Bus methods, signals or properties
814
Usage:
815
816
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
@dbus_service_property("org.example.Interface", signature="b",
820
access="r")
821
def Property_dbus_property(self):
822
return dbus.Boolean(False)
823
"""
824
def decorator(func):
825
func._dbus_annotations = annotations
826
return func
827
return decorator
828
829
830
554
class DBusPropertyException(dbus.exceptions.DBusException):
831
555
"""A base class for D-Bus property-related exceptions
832
556
"""
833
pass
557
def __unicode__(self):
558
return unicode(str(self))
559
834
560
835
561
class DBusPropertyAccessException(DBusPropertyException):
836
562
"""A property's access permissions disallows an operation.
846
572
847
573
class DBusObjectWithProperties(dbus.service.Object):
848
574
"""A D-Bus object with properties.
849
575
850
576
Classes inheriting from this can use the dbus_service_property
851
577
decorator to expose methods as D-Bus properties. It exposes the
852
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
853
579
"""
854
580
855
581
@staticmethod
856
def _is_dbus_thing(thing):
857
"""Returns a function testing if an attribute is a D-Bus thing
858
859
If called like _is_dbus_thing("method") it returns a function
860
suitable for use as predicate to inspect.getmembers().
861
"""
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
False)
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
864
584
865
def _get_all_dbus_things(self, thing):
585
def _get_all_dbus_properties(self):
866
586
"""Returns a generator of (name, attribute) pairs
867
587
"""
868
return ((getattr(athing.__get__(self), "_dbus_name",
869
name),
870
athing.__get__(self))
871
for cls in self.__class__.__mro__
872
for name, athing in
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
875
591
876
592
def _get_dbus_property(self, interface_name, property_name):
877
593
"""Returns a bound method if one exists which is a D-Bus
878
594
property with the specified name and interface.
879
595
"""
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
882
(cls,
883
self._is_dbus_thing("property"))):
884
if (value._dbus_name == property_name
885
and value._dbus_interface == interface_name):
886
return value.__get__(self)
887
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
888
606
# No such property
889
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
608
+ interface_name + "."
914
632
# The byte_arrays option is not supported yet on
915
633
# signatures other than "ay".
916
634
if prop._dbus_signature != "ay":
917
raise ValueError("Byte arrays not supported for non-"
918
"'ay' signature {!r}"
919
.format(prop._dbus_signature))
920
value = dbus.ByteArray(b''.join(chr(byte)
921
for byte in value))
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
922
638
prop(value)
923
639
924
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
926
642
def GetAll(self, interface_name):
927
643
"""Standard D-Bus property GetAll() method, see D-Bus
928
644
standard.
929
645
930
646
Note: Will not include properties with access="write".
931
647
"""
932
properties = {}
933
for name, prop in self._get_all_dbus_things("property"):
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
934
650
if (interface_name
935
651
and interface_name != prop._dbus_interface):
936
652
# Interface non-empty but did not match
940
656
continue
941
657
value = prop()
942
658
if not hasattr(value, "variant_level"):
943
properties[name] = value
659
all[name] = value
944
660
continue
945
properties[name] = type(value)(value, variant_level=
946
value.variant_level+1)
947
return dbus.Dictionary(properties, signature="sv")
948
949
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
950
def PropertiesChanged(self, interface_name, changed_properties,
951
invalidated_properties):
952
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
953
standard.
954
"""
955
pass
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
956
664
957
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
958
666
out_signature="s",
959
667
path_keyword='object_path',
960
668
connection_keyword='connection')
961
669
def Introspect(self, object_path, connection):
962
"""Overloading of standard D-Bus method.
963
964
Inserts property tags and interface annotation tags.
670
"""Standard D-Bus method, overloaded to insert property tags.
965
671
"""
966
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
967
673
connection)
974
680
e.setAttribute("access", prop._dbus_access)
975
681
return e
976
682
for if_tag in document.getElementsByTagName("interface"):
977
# Add property tags
978
683
for tag in (make_tag(document, name, prop)
979
684
for name, prop
980
in self._get_all_dbus_things("property")
685
in self._get_all_dbus_properties()
981
686
if prop._dbus_interface
982
687
== if_tag.getAttribute("name")):
983
688
if_tag.appendChild(tag)
984
# Add annotation tags
985
for typ in ("method", "signal", "property"):
986
for tag in if_tag.getElementsByTagName(typ):
987
annots = dict()
988
for name, prop in (self.
989
_get_all_dbus_things(typ)):
990
if (name == tag.getAttribute("name")
991
and prop._dbus_interface
992
== if_tag.getAttribute("name")):
993
annots.update(getattr
994
(prop,
995
"_dbus_annotations",
996
{}))
997
for name, value in annots.items():
998
ann_tag = document.createElement(
999
"annotation")
1000
ann_tag.setAttribute("name", name)
1001
ann_tag.setAttribute("value", value)
1002
tag.appendChild(ann_tag)
1003
# Add interface annotation tags
1004
for annotation, value in dict(
1005
itertools.chain.from_iterable(
1006
annotations().items()
1007
for name, annotations in
1008
self._get_all_dbus_things("interface")
1009
if name == if_tag.getAttribute("name")
1010
)).items():
1011
ann_tag = document.createElement("annotation")
1012
ann_tag.setAttribute("name", annotation)
1013
ann_tag.setAttribute("value", value)
1014
if_tag.appendChild(ann_tag)
1015
689
# Add the names to the return values for the
1016
690
# "org.freedesktop.DBus.Properties" methods
1017
691
if (if_tag.getAttribute("name")
1030
704
xmlstring = document.toxml("utf-8")
1031
705
document.unlink()
1032
706
except (AttributeError, xml.dom.DOMException,
1033
xml.parsers.expat.ExpatError) as error:
707
xml.parsers.expat.ExpatError), error:
1034
708
logger.error("Failed to override Introspection method",
1035
exc_info=error)
709
error)
1036
710
return xmlstring
1037
711
1038
712
1039
def datetime_to_dbus(dt, variant_level=0):
1040
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1041
if dt is None:
1042
return dbus.String("", variant_level = variant_level)
1043
return dbus.String(dt.isoformat(),
1044
variant_level=variant_level)
1045
1046
1047
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1048
"""A class decorator; applied to a subclass of
1049
dbus.service.Object, it will add alternate D-Bus attributes with
1050
interface names according to the "alt_interface_names" mapping.
1051
Usage:
1052
1053
@alternate_dbus_interfaces({"org.example.Interface":
1054
"net.example.AlternateInterface"})
1055
class SampleDBusObject(dbus.service.Object):
1056
@dbus.service.method("org.example.Interface")
1057
def SampleDBusMethod():
1058
pass
1059
1060
The above "SampleDBusMethod" on "SampleDBusObject" will be
1061
reachable via two interfaces: "org.example.Interface" and
1062
"net.example.AlternateInterface", the latter of which will have
1063
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1064
"true", unless "deprecate" is passed with a False value.
1065
1066
This works for methods and signals, and also for D-Bus properties
1067
(from DBusObjectWithProperties) and interfaces (from the
1068
dbus_interface_annotations decorator).
1069
"""
1070
def wrapper(cls):
1071
for orig_interface_name, alt_interface_name in (
1072
alt_interface_names.items()):
1073
attr = {}
1074
interface_names = set()
1075
# Go though all attributes of the class
1076
for attrname, attribute in inspect.getmembers(cls):
1077
# Ignore non-D-Bus attributes, and D-Bus attributes
1078
# with the wrong interface name
1079
if (not hasattr(attribute, "_dbus_interface")
1080
or not attribute._dbus_interface
1081
.startswith(orig_interface_name)):
1082
continue
1083
# Create an alternate D-Bus interface name based on
1084
# the current name
1085
alt_interface = (attribute._dbus_interface
1086
.replace(orig_interface_name,
1087
alt_interface_name))
1088
interface_names.add(alt_interface)
1089
# Is this a D-Bus signal?
1090
if getattr(attribute, "_dbus_is_signal", False):
1091
# Extract the original non-method undecorated
1092
# function by black magic
1093
nonmethod_func = (dict(
1094
zip(attribute.func_code.co_freevars,
1095
attribute.__closure__))["func"]
1096
.cell_contents)
1097
# Create a new, but exactly alike, function
1098
# object, and decorate it to be a new D-Bus signal
1099
# with the alternate D-Bus interface name
1100
new_function = (dbus.service.signal
1101
(alt_interface,
1102
attribute._dbus_signature)
1103
(types.FunctionType(
1104
nonmethod_func.func_code,
1105
nonmethod_func.func_globals,
1106
nonmethod_func.func_name,
1107
nonmethod_func.func_defaults,
1108
nonmethod_func.func_closure)))
1109
# Copy annotations, if any
1110
try:
1111
new_function._dbus_annotations = (
1112
dict(attribute._dbus_annotations))
1113
except AttributeError:
1114
pass
1115
# Define a creator of a function to call both the
1116
# original and alternate functions, so both the
1117
# original and alternate signals gets sent when
1118
# the function is called
1119
def fixscope(func1, func2):
1120
"""This function is a scope container to pass
1121
func1 and func2 to the "call_both" function
1122
outside of its arguments"""
1123
def call_both(*args, **kwargs):
1124
"""This function will emit two D-Bus
1125
signals by calling func1 and func2"""
1126
func1(*args, **kwargs)
1127
func2(*args, **kwargs)
1128
return call_both
1129
# Create the "call_both" function and add it to
1130
# the class
1131
attr[attrname] = fixscope(attribute, new_function)
1132
# Is this a D-Bus method?
1133
elif getattr(attribute, "_dbus_is_method", False):
1134
# Create a new, but exactly alike, function
1135
# object. Decorate it to be a new D-Bus method
1136
# with the alternate D-Bus interface name. Add it
1137
# to the class.
1138
attr[attrname] = (dbus.service.method
1139
(alt_interface,
1140
attribute._dbus_in_signature,
1141
attribute._dbus_out_signature)
1142
(types.FunctionType
1143
(attribute.func_code,
1144
attribute.func_globals,
1145
attribute.func_name,
1146
attribute.func_defaults,
1147
attribute.func_closure)))
1148
# Copy annotations, if any
1149
try:
1150
attr[attrname]._dbus_annotations = (
1151
dict(attribute._dbus_annotations))
1152
except AttributeError:
1153
pass
1154
# Is this a D-Bus property?
1155
elif getattr(attribute, "_dbus_is_property", False):
1156
# Create a new, but exactly alike, function
1157
# object, and decorate it to be a new D-Bus
1158
# property with the alternate D-Bus interface
1159
# name. Add it to the class.
1160
attr[attrname] = (dbus_service_property
1161
(alt_interface,
1162
attribute._dbus_signature,
1163
attribute._dbus_access,
1164
attribute
1165
._dbus_get_args_options
1166
["byte_arrays"])
1167
(types.FunctionType
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1173
# Copy annotations, if any
1174
try:
1175
attr[attrname]._dbus_annotations = (
1176
dict(attribute._dbus_annotations))
1177
except AttributeError:
1178
pass
1179
# Is this a D-Bus interface?
1180
elif getattr(attribute, "_dbus_is_interface", False):
1181
# Create a new, but exactly alike, function
1182
# object. Decorate it to be a new D-Bus interface
1183
# with the alternate D-Bus interface name. Add it
1184
# to the class.
1185
attr[attrname] = (dbus_interface_annotations
1186
(alt_interface)
1187
(types.FunctionType
1188
(attribute.func_code,
1189
attribute.func_globals,
1190
attribute.func_name,
1191
attribute.func_defaults,
1192
attribute.func_closure)))
1193
if deprecate:
1194
# Deprecate all alternate interfaces
1195
iname="_AlternateDBusNames_interface_annotation{}"
1196
for interface_name in interface_names:
1197
@dbus_interface_annotations(interface_name)
1198
def func(self):
1199
return { "org.freedesktop.DBus.Deprecated":
1200
"true" }
1201
# Find an unused name
1202
for aname in (iname.format(i)
1203
for i in itertools.count()):
1204
if aname not in attr:
1205
attr[aname] = func
1206
break
1207
if interface_names:
1208
# Replace the class with a new subclass of it with
1209
# methods, signals, etc. as created above.
1210
cls = type(b"{}Alternate".format(cls.__name__),
1211
(cls,), attr)
1212
return cls
1213
return wrapper
1214
1215
1216
@alternate_dbus_interfaces({"se.recompile.Mandos":
1217
"se.bsnet.fukt.Mandos"})
1218
713
class ClientDBus(Client, DBusObjectWithProperties):
1219
714
"""A Client class using D-Bus
1220
715
1226
721
runtime_expansions = (Client.runtime_expansions
1227
722
+ ("dbus_object_path",))
1228
723
1229
_interface = "se.recompile.Mandos.Client"
1230
1231
724
# dbus.service.Object doesn't use super(), so we can't either.
1232
725
1233
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1234
728
self.bus = bus
1235
729
Client.__init__(self, *args, **kwargs)
1236
730
# Only now, when this client is initialized, can it show up on
1237
731
# the D-Bus
1238
client_object_name = str(self.name).translate(
732
client_object_name = unicode(self.name).translate(
1239
733
{ord("."): ord("_"),
1240
734
ord("-"): ord("_")})
1241
735
self.dbus_object_path = (dbus.ObjectPath
1242
736
("/clients/" + client_object_name))
1243
737
DBusObjectWithProperties.__init__(self, self.bus,
1244
738
self.dbus_object_path)
1245
1246
def notifychangeproperty(transform_func,
1247
dbus_name, type_func=lambda x: x,
1248
variant_level=1, invalidate_only=False,
1249
_interface=_interface):
1250
""" Modify a variable so that it's a property which announces
1251
its changes to DBus.
1252
1253
transform_fun: Function that takes a value and a variant_level
1254
and transforms it to a D-Bus type.
1255
dbus_name: D-Bus name of the variable
1256
type_func: Function that transform the value before sending it
1257
to the D-Bus. Default: no transform
1258
variant_level: D-Bus variant level. Default: 1
1259
"""
1260
attrname = "_{}".format(dbus_name)
1261
def setter(self, value):
1262
if hasattr(self, "dbus_object_path"):
1263
if (not hasattr(self, attrname) or
1264
type_func(getattr(self, attrname, None))
1265
!= type_func(value)):
1266
if invalidate_only:
1267
self.PropertiesChanged(_interface,
1268
dbus.Dictionary(),
1269
dbus.Array
1270
((dbus_name,)))
1271
else:
1272
dbus_value = transform_func(type_func(value),
1273
variant_level
1274
=variant_level)
1275
self.PropertyChanged(dbus.String(dbus_name),
1276
dbus_value)
1277
self.PropertiesChanged(_interface,
1278
dbus.Dictionary({
1279
dbus.String(dbus_name):
1280
dbus_value }), dbus.Array())
1281
setattr(self, attrname, value)
1282
1283
return property(lambda self: getattr(self, attrname), setter)
1284
1285
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1286
approvals_pending = notifychangeproperty(dbus.Boolean,
1287
"ApprovalPending",
1288
type_func = bool)
1289
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1290
last_enabled = notifychangeproperty(datetime_to_dbus,
1291
"LastEnabled")
1292
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1293
type_func = lambda checker:
1294
checker is not None)
1295
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1296
"LastCheckedOK")
1297
last_checker_status = notifychangeproperty(dbus.Int16,
1298
"LastCheckerStatus")
1299
last_approval_request = notifychangeproperty(
1300
datetime_to_dbus, "LastApprovalRequest")
1301
approved_by_default = notifychangeproperty(dbus.Boolean,
1302
"ApprovedByDefault")
1303
approval_delay = notifychangeproperty(dbus.UInt64,
1304
"ApprovalDelay",
1305
type_func =
1306
lambda td: td.total_seconds()
1307
* 1000)
1308
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = lambda td: td.total_seconds() * 1000)
1311
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func = lambda td:
1314
td.total_seconds() * 1000)
1315
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = lambda td: td.total_seconds() * 1000)
1318
interval = notifychangeproperty(dbus.UInt64,
1319
"Interval",
1320
type_func =
1321
lambda td: td.total_seconds()
1322
* 1000)
1323
checker_command = notifychangeproperty(dbus.String, "Checker")
1324
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1325
invalidate_only=True)
1326
1327
del notifychangeproperty
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
1328
783
1329
784
def __del__(self, *args, **kwargs):
1330
785
try:
1339
794
*args, **kwargs):
1340
795
self.checker_callback_tag = None
1341
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
1342
800
if os.WIFEXITED(condition):
1343
801
exitstatus = os.WEXITSTATUS(condition)
1344
802
# Emit D-Bus signal
1354
812
return Client.checker_callback(self, pid, condition, command,
1355
813
*args, **kwargs)
1356
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1357
833
def start_checker(self, *args, **kwargs):
1358
old_checker_pid = getattr(self.checker, "pid", None)
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
837
else:
838
old_checker_pid = None
1359
839
r = Client.start_checker(self, *args, **kwargs)
1360
840
# Only if new checker process was started
1361
841
if (self.checker is not None
1362
842
and old_checker_pid != self.checker.pid):
1363
843
# Emit D-Bus signal
1364
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
1365
848
return r
1366
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
return r
858
1367
859
def _reset_approved(self):
1368
self.approved = None
860
self._approved = None
1369
861
return False
1370
862
1371
863
def approve(self, value=True):
1372
self.approved = value
1373
gobject.timeout_add(int(self.approval_duration.total_seconds()
1374
* 1000), self._reset_approved)
1375
864
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
869
1376
870
1377
871
## D-Bus methods, signals & properties
1378
1379
## Interfaces
872
_interface = "se.bsnet.fukt.Mandos.Client"
1380
873
1381
874
## Signals
1382
875
1393
886
pass
1394
887
1395
888
# PropertyChanged - signal
1396
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1397
889
@dbus.service.signal(_interface, signature="sv")
1398
890
def PropertyChanged(self, property, value):
1399
891
"D-Bus signal"
1430
922
# CheckedOK - method
1431
923
@dbus.service.method(_interface)
1432
924
def CheckedOK(self):
1433
self.checked_ok()
925
return self.checked_ok()
1434
926
1435
927
# Enable - method
1436
928
@dbus.service.method(_interface)
1469
961
if value is None: # get
1470
962
return dbus.Boolean(self.approved_by_default)
1471
963
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
1472
967
1473
968
# ApprovalDelay - property
1474
969
@dbus_service_property(_interface, signature="t",
1475
970
access="readwrite")
1476
971
def ApprovalDelay_dbus_property(self, value=None):
1477
972
if value is None: # get
1478
return dbus.UInt64(self.approval_delay.total_seconds()
1479
* 1000)
973
return dbus.UInt64(self.approval_delay_milliseconds())
1480
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
1481
978
1482
979
# ApprovalDuration - property
1483
980
@dbus_service_property(_interface, signature="t",
1484
981
access="readwrite")
1485
982
def ApprovalDuration_dbus_property(self, value=None):
1486
983
if value is None: # get
1487
return dbus.UInt64(self.approval_duration.total_seconds()
1488
* 1000)
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
1489
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
1490
990
1491
991
# Name - property
1492
992
@dbus_service_property(_interface, signature="s", access="read")
1504
1004
def Host_dbus_property(self, value=None):
1505
1005
if value is None: # get
1506
1006
return dbus.String(self.host)
1507
self.host = str(value)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1508
1011
1509
1012
# Created - property
1510
1013
@dbus_service_property(_interface, signature="s", access="read")
1511
1014
def Created_dbus_property(self):
1512
return datetime_to_dbus(self.created)
1015
return dbus.String(self._datetime_to_dbus(self.created))
1513
1016
1514
1017
# LastEnabled - property
1515
1018
@dbus_service_property(_interface, signature="s", access="read")
1516
1019
def LastEnabled_dbus_property(self):
1517
return datetime_to_dbus(self.last_enabled)
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1518
1023
1519
1024
# Enabled - property
1520
1025
@dbus_service_property(_interface, signature="b",
1534
1039
if value is not None:
1535
1040
self.checked_ok()
1536
1041
return
1537
return datetime_to_dbus(self.last_checked_ok)
1538
1539
# LastCheckerStatus - property
1540
@dbus_service_property(_interface, signature="n",
1541
access="read")
1542
def LastCheckerStatus_dbus_property(self):
1543
return dbus.Int16(self.last_checker_status)
1544
1545
# Expires - property
1546
@dbus_service_property(_interface, signature="s", access="read")
1547
def Expires_dbus_property(self):
1548
return datetime_to_dbus(self.expires)
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1549
1046
1550
1047
# LastApprovalRequest - property
1551
1048
@dbus_service_property(_interface, signature="s", access="read")
1552
1049
def LastApprovalRequest_dbus_property(self):
1553
return datetime_to_dbus(self.last_approval_request)
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1554
1055
1555
1056
# Timeout - property
1556
1057
@dbus_service_property(_interface, signature="t",
1557
1058
access="readwrite")
1558
1059
def Timeout_dbus_property(self, value=None):
1559
1060
if value is None: # get
1560
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1561
old_timeout = self.timeout
1061
return dbus.UInt64(self.timeout_milliseconds())
1562
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
1563
# Reschedule disabling
1564
if self.enabled:
1565
now = datetime.datetime.utcnow()
1566
self.expires += self.timeout - old_timeout
1567
if self.expires <= now:
1568
# The timeout has passed
1569
self.disable()
1570
else:
1571
if (getattr(self, "disable_initiator_tag", None)
1572
is None):
1573
return
1574
gobject.source_remove(self.disable_initiator_tag)
1575
self.disable_initiator_tag = (
1576
gobject.timeout_add(
1577
int((self.expires - now).total_seconds()
1578
* 1000), self.disable))
1579
1580
# ExtendedTimeout - property
1581
@dbus_service_property(_interface, signature="t",
1582
access="readwrite")
1583
def ExtendedTimeout_dbus_property(self, value=None):
1584
if value is None: # get
1585
return dbus.UInt64(self.extended_timeout.total_seconds()
1586
* 1000)
1587
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1588
1083
1589
1084
# Interval - property
1590
1085
@dbus_service_property(_interface, signature="t",
1591
1086
access="readwrite")
1592
1087
def Interval_dbus_property(self, value=None):
1593
1088
if value is None: # get
1594
return dbus.UInt64(self.interval.total_seconds() * 1000)
1089
return dbus.UInt64(self.interval_milliseconds())
1595
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1596
1094
if getattr(self, "checker_initiator_tag", None) is None:
1597
1095
return
1598
if self.enabled:
1599
# Reschedule checker run
1600
gobject.source_remove(self.checker_initiator_tag)
1601
self.checker_initiator_tag = (gobject.timeout_add
1602
(value, self.start_checker))
1603
self.start_checker() # Start one now, too
1604
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1101
1605
1102
# Checker - property
1606
1103
@dbus_service_property(_interface, signature="s",
1607
1104
access="readwrite")
1608
1105
def Checker_dbus_property(self, value=None):
1609
1106
if value is None: # get
1610
1107
return dbus.String(self.checker_command)
1611
self.checker_command = str(value)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1612
1113
1613
1114
# CheckerRunning - property
1614
1115
@dbus_service_property(_interface, signature="b",
1630
1131
@dbus_service_property(_interface, signature="ay",
1631
1132
access="write", byte_arrays=True)
1632
1133
def Secret_dbus_property(self, value):
1633
self.secret = bytes(value)
1134
self.secret = str(value)
1634
1135
1635
1136
del _interface
1636
1137
1641
1142
self._pipe.send(('init', fpr, address))
1642
1143
if not self._pipe.recv():
1643
1144
raise KeyError()
1644
1145
1645
1146
def __getattribute__(self, name):
1646
if name == '_pipe':
1147
if(name == '_pipe'):
1647
1148
return super(ProxyClient, self).__getattribute__(name)
1648
1149
self._pipe.send(('getattr', name))
1649
1150
data = self._pipe.recv()
1654
1155
self._pipe.send(('funcall', name, args, kwargs))
1655
1156
return self._pipe.recv()[1]
1656
1157
return func
1657
1158
1658
1159
def __setattr__(self, name, value):
1659
if name == '_pipe':
1160
if(name == '_pipe'):
1660
1161
return super(ProxyClient, self).__setattr__(name, value)
1661
1162
self._pipe.send(('setattr', name, value))
1662
1163
1670
1171
def handle(self):
1671
1172
with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
1173
logger.info("TCP connection from: %s",
1673
str(self.client_address))
1174
unicode(self.client_address))
1674
1175
logger.debug("Pipe FD: %d",
1675
1176
self.server.child_pipe.fileno())
1676
1177
1677
1178
session = (gnutls.connection
1678
1179
.ClientSession(self.request,
1679
1180
gnutls.connection
1680
1181
.X509Credentials()))
1681
1182
1682
1183
# Note: gnutls.connection.X509Credentials is really a
1683
1184
# generic GnuTLS certificate credentials object so long as
1684
1185
# no X.509 keys are added to it. Therefore, we can use it
1685
1186
# here despite using OpenPGP certificates.
1686
1187
1687
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
1189
# "+AES-256-CBC", "+SHA1",
1689
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1695
1196
(gnutls.library.functions
1696
1197
.gnutls_priority_set_direct(session._c_object,
1697
1198
priority, None))
1698
1199
1699
1200
# Start communication using the Mandos protocol
1700
1201
# Get protocol number
1701
1202
line = self.request.makefile().readline()
1702
1203
logger.debug("Protocol version: %r", line)
1703
1204
try:
1704
1205
if int(line.strip().split()[0]) > 1:
1705
raise RuntimeError(line)
1706
except (ValueError, IndexError, RuntimeError) as error:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
1707
1208
logger.error("Unknown protocol version: %s", error)
1708
1209
return
1709
1210
1710
1211
# Start GnuTLS connection
1711
1212
try:
1712
1213
session.handshake()
1713
except gnutls.errors.GNUTLSError as error:
1214
except gnutls.errors.GNUTLSError, error:
1714
1215
logger.warning("Handshake failed: %s", error)
1715
1216
# Do not run session.bye() here: the session is not
1716
1217
# established. Just abandon the request.
1717
1218
return
1718
1219
logger.debug("Handshake succeeded")
1719
1220
1720
1221
approval_required = False
1721
1222
try:
1722
1223
try:
1723
1224
fpr = self.fingerprint(self.peer_certificate
1724
1225
(session))
1725
except (TypeError,
1726
gnutls.errors.GNUTLSError) as error:
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1727
1227
logger.warning("Bad certificate: %s", error)
1728
1228
return
1729
1229
logger.debug("Fingerprint: %s", fpr)
1730
1230
1731
1231
try:
1732
1232
client = ProxyClient(child_pipe, fpr,
1733
1233
self.client_address)
1741
1241
1742
1242
while True:
1743
1243
if not client.enabled:
1744
logger.info("Client %s is disabled",
1244
logger.warning("Client %s is disabled",
1745
1245
client.name)
1746
1246
if self.server.use_dbus:
1747
1247
# Emit D-Bus signal
1748
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
1749
1249
return
1750
1250
1751
if client.approved or not client.approval_delay:
1251
if client._approved or not client.approval_delay:
1752
1252
#We are approved or approval is disabled
1753
1253
break
1754
elif client.approved is None:
1254
elif client._approved is None:
1755
1255
logger.info("Client %s needs approval",
1756
1256
client.name)
1757
1257
if self.server.use_dbus:
1758
1258
# Emit D-Bus signal
1759
1259
client.NeedApproval(
1760
client.approval_delay.total_seconds()
1761
* 1000, client.approved_by_default)
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
1762
1262
else:
1763
1263
logger.warning("Client %s was not approved",
1764
1264
client.name)
1768
1268
return
1769
1269
1770
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1771
1272
time = datetime.datetime.now()
1772
1273
client.changedstate.acquire()
1773
client.changedstate.wait(delay.total_seconds())
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1774
1275
client.changedstate.release()
1775
1276
time2 = datetime.datetime.now()
1776
1277
if (time2 - time) >= delay:
1791
1292
while sent_size < len(client.secret):
1792
1293
try:
1793
1294
sent = session.send(client.secret[sent_size:])
1794
except gnutls.errors.GNUTLSError as error:
1795
logger.warning("gnutls send failed",
1796
exc_info=error)
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1797
1297
return
1798
1298
logger.debug("Sent: %d, remaining: %d",
1799
1299
sent, len(client.secret)
1800
1300
- (sent_size + sent))
1801
1301
sent_size += sent
1802
1302
1803
1303
logger.info("Sending secret to %s", client.name)
1804
# bump the timeout using extended_timeout
1805
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
1806
1306
if self.server.use_dbus:
1807
1307
# Emit D-Bus signal
1808
1308
client.GotSecret()
1812
1312
client.approvals_pending -= 1
1813
1313
try:
1814
1314
session.bye()
1815
except gnutls.errors.GNUTLSError as error:
1816
logger.warning("GnuTLS bye failed",
1817
exc_info=error)
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1818
1317
1819
1318
@staticmethod
1820
1319
def peer_certificate(session):
1876
1375
# Convert the buffer to a Python bytestring
1877
1376
fpr = ctypes.string_at(buf, buf_len.value)
1878
1377
# Convert the bytestring to hexadecimal notation
1879
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1880
1379
return hex_fpr
1881
1380
1882
1381
1885
1384
def sub_process_main(self, request, address):
1886
1385
try:
1887
1386
self.finish_request(request, address)
1888
except Exception:
1387
except:
1889
1388
self.handle_error(request, address)
1890
1389
self.close_request(request)
1891
1390
1892
1391
def process_request(self, request, address):
1893
1392
"""Start a new process to process the request."""
1894
proc = multiprocessing.Process(target = self.sub_process_main,
1895
args = (request, address))
1896
proc.start()
1897
return proc
1898
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1899
1395
1900
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1901
1397
""" adds a pipe to the MixIn """
1905
1401
This function creates a new pipe in self.pipe
1906
1402
"""
1907
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1908
1909
proc = MultiprocessingMixIn.process_request(self, request,
1910
client_address)
1404
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1911
1407
self.child_pipe.close()
1912
self.add_pipe(parent_pipe, proc)
1913
1914
def add_pipe(self, parent_pipe, proc):
1408
self.add_pipe(parent_pipe)
1409
1410
def add_pipe(self, parent_pipe):
1915
1411
"""Dummy function; override as necessary"""
1916
raise NotImplementedError()
1917
1412
raise NotImplementedError
1918
1413
1919
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1920
1415
socketserver.TCPServer, object):
1926
1421
use_ipv6: Boolean; to use IPv6 or not
1927
1422
"""
1928
1423
def __init__(self, server_address, RequestHandlerClass,
1929
interface=None, use_ipv6=True, socketfd=None):
1930
"""If socketfd is set, use that file descriptor instead of
1931
creating a new one with socket.socket().
1932
"""
1424
interface=None, use_ipv6=True):
1933
1425
self.interface = interface
1934
1426
if use_ipv6:
1935
1427
self.address_family = socket.AF_INET6
1936
if socketfd is not None:
1937
# Save the file descriptor
1938
self.socketfd = socketfd
1939
# Save the original socket.socket() function
1940
self.socket_socket = socket.socket
1941
# To implement --socket, we monkey patch socket.socket.
1942
#
1943
# (When socketserver.TCPServer is a new-style class, we
1944
# could make self.socket into a property instead of monkey
1945
# patching socket.socket.)
1946
#
1947
# Create a one-time-only replacement for socket.socket()
1948
@functools.wraps(socket.socket)
1949
def socket_wrapper(*args, **kwargs):
1950
# Restore original function so subsequent calls are
1951
# not affected.
1952
socket.socket = self.socket_socket
1953
del self.socket_socket
1954
# This time only, return a new socket object from the
1955
# saved file descriptor.
1956
return socket.fromfd(self.socketfd, *args, **kwargs)
1957
# Replace socket.socket() function with wrapper
1958
socket.socket = socket_wrapper
1959
# The socketserver.TCPServer.__init__ will call
1960
# socket.socket(), which might be our replacement,
1961
# socket_wrapper(), if socketfd was set.
1962
1428
socketserver.TCPServer.__init__(self, server_address,
1963
1429
RequestHandlerClass)
1964
1965
1430
def server_bind(self):
1966
1431
"""This overrides the normal server_bind() function
1967
1432
to bind to an interface if one was specified, and also NOT to
1975
1440
try:
1976
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1977
1442
SO_BINDTODEVICE,
1978
(self.interface + "\0")
1979
.encode("utf-8"))
1980
except socket.error as error:
1981
if error.errno == errno.EPERM:
1982
logger.error("No permission to bind to"
1983
" interface %s", self.interface)
1984
elif error.errno == errno.ENOPROTOOPT:
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1985
1451
logger.error("SO_BINDTODEVICE not available;"
1986
1452
" cannot bind to interface %s",
1987
1453
self.interface)
1988
elif error.errno == errno.ENODEV:
1989
logger.error("Interface %s does not exist,"
1990
" cannot bind", self.interface)
1991
1454
else:
1992
1455
raise
1993
1456
# Only bind(2) the socket if we really need to.
1996
1459
if self.address_family == socket.AF_INET6:
1997
1460
any_address = "::" # in6addr_any
1998
1461
else:
1999
any_address = "0.0.0.0" # INADDR_ANY
1462
any_address = socket.INADDR_ANY
2000
1463
self.server_address = (any_address,
2001
1464
self.server_address[1])
2002
1465
elif not self.server_address[1]:
2023
1486
"""
2024
1487
def __init__(self, server_address, RequestHandlerClass,
2025
1488
interface=None, use_ipv6=True, clients=None,
2026
gnutls_priority=None, use_dbus=True, socketfd=None):
1489
gnutls_priority=None, use_dbus=True):
2027
1490
self.enabled = False
2028
1491
self.clients = clients
2029
1492
if self.clients is None:
2030
self.clients = {}
1493
self.clients = set()
2031
1494
self.use_dbus = use_dbus
2032
1495
self.gnutls_priority = gnutls_priority
2033
1496
IPv6_TCPServer.__init__(self, server_address,
2034
1497
RequestHandlerClass,
2035
1498
interface = interface,
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
1499
use_ipv6 = use_ipv6)
2038
1500
def server_activate(self):
2039
1501
if self.enabled:
2040
1502
return socketserver.TCPServer.server_activate(self)
2041
2042
1503
def enable(self):
2043
1504
self.enabled = True
2044
2045
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
2046
1506
# Call "handle_ipc" for both data and EOF events
2047
1507
gobject.io_add_watch(parent_pipe.fileno(),
2048
1508
gobject.IO_IN | gobject.IO_HUP,
2049
1509
functools.partial(self.handle_ipc,
2050
parent_pipe =
2051
parent_pipe,
2052
proc = proc))
2053
1510
parent_pipe = parent_pipe))
1511
2054
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2055
proc = None, client_object=None):
2056
# error, or the other end of multiprocessing.Pipe has closed
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2058
# Wait for other process to exit
2059
proc.join()
1513
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2060
1530
return False
2061
1531
2062
1532
# Read a request from the child
2067
1537
fpr = request[1]
2068
1538
address = request[2]
2069
1539
2070
for c in self.clients.itervalues():
1540
for c in self.clients:
2071
1541
if c.fingerprint == fpr:
2072
1542
client = c
2073
1543
break
2074
1544
else:
2075
logger.info("Client not found for fingerprint: %s, ad"
2076
"dress: %s", fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2077
1547
if self.use_dbus:
2078
1548
# Emit D-Bus signal
2079
mandos_dbus_service.ClientNotFound(fpr,
2080
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2081
1550
parent_pipe.send(False)
2082
1551
return False
2083
1552
2084
1553
gobject.io_add_watch(parent_pipe.fileno(),
2085
1554
gobject.IO_IN | gobject.IO_HUP,
2086
1555
functools.partial(self.handle_ipc,
2087
parent_pipe =
2088
parent_pipe,
2089
proc = proc,
2090
client_object =
2091
client))
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2092
1558
parent_pipe.send(True)
2093
# remove the old hook in favor of the new above hook on
2094
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2095
1560
return False
2096
1561
if command == 'funcall':
2097
1562
funcname = request[1]
2098
1563
args = request[2]
2099
1564
kwargs = request[3]
2100
1565
2101
parent_pipe.send(('data', getattr(client_object,
2102
funcname)(*args,
2103
**kwargs)))
2104
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
2105
1568
if command == 'getattr':
2106
1569
attrname = request[1]
2107
1570
if callable(client_object.__getattribute__(attrname)):
2108
1571
parent_pipe.send(('function',))
2109
1572
else:
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2112
1574
2113
1575
if command == 'setattr':
2114
1576
attrname = request[1]
2115
1577
value = request[2]
2116
1578
setattr(client_object, attrname, value)
2117
1579
2118
1580
return True
2119
1581
2120
1582
2121
def rfc3339_duration_to_delta(duration):
2122
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2123
2124
>>> rfc3339_duration_to_delta("P7D")
2125
datetime.timedelta(7)
2126
>>> rfc3339_duration_to_delta("PT60S")
2127
datetime.timedelta(0, 60)
2128
>>> rfc3339_duration_to_delta("PT60M")
2129
datetime.timedelta(0, 3600)
2130
>>> rfc3339_duration_to_delta("PT24H")
2131
datetime.timedelta(1)
2132
>>> rfc3339_duration_to_delta("P1W")
2133
datetime.timedelta(7)
2134
>>> rfc3339_duration_to_delta("PT5M30S")
2135
datetime.timedelta(0, 330)
2136
>>> rfc3339_duration_to_delta("P1DT3M20S")
2137
datetime.timedelta(1, 200)
2138
"""
2139
2140
# Parsing an RFC 3339 duration with regular expressions is not
2141
# possible - there would have to be multiple places for the same
2142
# values, like seconds. The current code, while more esoteric, is
2143
# cleaner without depending on a parsing library. If Python had a
2144
# built-in library for parsing we would use it, but we'd like to
2145
# avoid excessive use of external libraries.
2146
2147
# New type for defining tokens, syntax, and semantics all-in-one
2148
Token = collections.namedtuple("Token",
2149
("regexp", # To match token; if
2150
# "value" is not None,
2151
# must have a "group"
2152
# containing digits
2153
"value", # datetime.timedelta or
2154
# None
2155
"followers")) # Tokens valid after
2156
# this token
2157
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2158
# the "duration" ABNF definition in RFC 3339, Appendix A.
2159
token_end = Token(re.compile(r"$"), None, frozenset())
2160
token_second = Token(re.compile(r"(\d+)S"),
2161
datetime.timedelta(seconds=1),
2162
frozenset((token_end,)))
2163
token_minute = Token(re.compile(r"(\d+)M"),
2164
datetime.timedelta(minutes=1),
2165
frozenset((token_second, token_end)))
2166
token_hour = Token(re.compile(r"(\d+)H"),
2167
datetime.timedelta(hours=1),
2168
frozenset((token_minute, token_end)))
2169
token_time = Token(re.compile(r"T"),
2170
None,
2171
frozenset((token_hour, token_minute,
2172
token_second)))
2173
token_day = Token(re.compile(r"(\d+)D"),
2174
datetime.timedelta(days=1),
2175
frozenset((token_time, token_end)))
2176
token_month = Token(re.compile(r"(\d+)M"),
2177
datetime.timedelta(weeks=4),
2178
frozenset((token_day, token_end)))
2179
token_year = Token(re.compile(r"(\d+)Y"),
2180
datetime.timedelta(weeks=52),
2181
frozenset((token_month, token_end)))
2182
token_week = Token(re.compile(r"(\d+)W"),
2183
datetime.timedelta(weeks=1),
2184
frozenset((token_end,)))
2185
token_duration = Token(re.compile(r"P"), None,
2186
frozenset((token_year, token_month,
2187
token_day, token_time,
2188
token_week)))
2189
# Define starting values
2190
value = datetime.timedelta() # Value so far
2191
found_token = None
2192
followers = frozenset((token_duration,)) # Following valid tokens
2193
s = duration # String left to parse
2194
# Loop until end token is found
2195
while found_token is not token_end:
2196
# Search for any currently valid tokens
2197
for token in followers:
2198
match = token.regexp.match(s)
2199
if match is not None:
2200
# Token found
2201
if token.value is not None:
2202
# Value found, parse digits
2203
factor = int(match.group(1), 10)
2204
# Add to value so far
2205
value += factor * token.value
2206
# Strip token from string
2207
s = token.regexp.sub("", s, 1)
2208
# Go to found token
2209
found_token = token
2210
# Set valid next tokens
2211
followers = found_token.followers
2212
break
2213
else:
2214
# No currently valid tokens were found
2215
raise ValueError("Invalid RFC 3339 duration")
2216
# End token found
2217
return value
2218
2219
2220
1583
def string_to_delta(interval):
2221
1584
"""Parse a string and return a datetime.timedelta
2222
1585
2233
1596
>>> string_to_delta('5m 30s')
2234
1597
datetime.timedelta(0, 330)
2235
1598
"""
2236
2237
try:
2238
return rfc3339_duration_to_delta(interval)
2239
except ValueError:
2240
pass
2241
2242
1599
timevalue = datetime.timedelta(0)
2243
1600
for s in interval.split():
2244
1601
try:
2245
suffix = s[-1]
1602
suffix = unicode(s[-1])
2246
1603
value = int(s[:-1])
2247
1604
if suffix == "d":
2248
1605
delta = datetime.timedelta(value)
2255
1612
elif suffix == "w":
2256
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2257
1614
else:
2258
raise ValueError("Unknown suffix {!r}"
2259
.format(suffix))
2260
except IndexError as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2261
1617
raise ValueError(*(e.args))
2262
1618
timevalue += delta
2263
1619
return timevalue
2264
1620
2265
1621
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
2266
1646
def daemon(nochdir = False, noclose = False):
2267
1647
"""See daemon(3). Standard BSD Unix function.
2268
1648
2276
1656
sys.exit()
2277
1657
if not noclose:
2278
1658
# Close all standard open file descriptors
2279
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2280
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2281
raise OSError(errno.ENODEV, "{} not a character device"
2282
.format(os.devnull))
1661
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1663
% os.path.devnull)
2283
1664
os.dup2(null, sys.stdin.fileno())
2284
1665
os.dup2(null, sys.stdout.fileno())
2285
1666
os.dup2(null, sys.stderr.fileno())
2292
1673
##################################################################
2293
1674
# Parsing of options, both command line and config file
2294
1675
2295
parser = argparse.ArgumentParser()
2296
parser.add_argument("-v", "--version", action="version",
2297
version = "%(prog)s {}".format(version),
2298
help="show version number and exit")
2299
parser.add_argument("-i", "--interface", metavar="IF",
2300
help="Bind to interface IF")
2301
parser.add_argument("-a", "--address",
2302
help="Address to listen for requests on")
2303
parser.add_argument("-p", "--port", type=int,
2304
help="Port number to receive requests on")
2305
parser.add_argument("--check", action="store_true",
2306
help="Run self-test")
2307
parser.add_argument("--debug", action="store_true",
2308
help="Debug mode; run in foreground and log"
2309
" to terminal", default=None)
2310
parser.add_argument("--debuglevel", metavar="LEVEL",
2311
help="Debug level for stdout output")
2312
parser.add_argument("--priority", help="GnuTLS"
2313
" priority string (see GnuTLS documentation)")
2314
parser.add_argument("--servicename",
2315
metavar="NAME", help="Zeroconf service name")
2316
parser.add_argument("--configdir",
2317
default="/etc/mandos", metavar="DIR",
2318
help="Directory to search for configuration"
2319
" files")
2320
parser.add_argument("--no-dbus", action="store_false",
2321
dest="use_dbus", help="Do not provide D-Bus"
2322
" system bus interface", default=None)
2323
parser.add_argument("--no-ipv6", action="store_false",
2324
dest="use_ipv6", help="Do not use IPv6",
2325
default=None)
2326
parser.add_argument("--no-restore", action="store_false",
2327
dest="restore", help="Do not restore stored"
2328
" state", default=None)
2329
parser.add_argument("--socket", type=int,
2330
help="Specify a file descriptor to a network"
2331
" socket to use instead of creating one")
2332
parser.add_argument("--statedir", metavar="DIR",
2333
help="Directory to save/restore state in")
2334
parser.add_argument("--foreground", action="store_true",
2335
help="Run in foreground", default=None)
2336
parser.add_argument("--no-zeroconf", action="store_false",
2337
dest="zeroconf", help="Do not use Zeroconf",
2338
default=None)
2339
2340
options = parser.parse_args()
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1687
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1697
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
2341
1704
2342
1705
if options.check:
2343
1706
import doctest
2344
fail_count, test_count = doctest.testmod()
2345
sys.exit(os.EX_OK if fail_count == 0 else 1)
1707
doctest.testmod()
1708
sys.exit()
2346
1709
2347
1710
# Default values for config file for server-global settings
2348
1711
server_defaults = { "interface": "",
2350
1713
"port": "",
2351
1714
"debug": "False",
2352
1715
"priority":
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1716
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2354
1717
"servicename": "Mandos",
2355
1718
"use_dbus": "True",
2356
1719
"use_ipv6": "True",
2357
1720
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
2362
"zeroconf": "True",
2363
1721
}
2364
1722
2365
1723
# Parse config file for server-global settings
2370
1728
# Convert the SafeConfigParser object to a dict
2371
1729
server_settings = server_config.defaults()
2372
1730
# Use the appropriate methods on the non-string config options
2373
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1731
for option in ("debug", "use_dbus", "use_ipv6"):
2374
1732
server_settings[option] = server_config.getboolean("DEFAULT",
2375
1733
option)
2376
1734
if server_settings["port"]:
2377
1735
server_settings["port"] = server_config.getint("DEFAULT",
2378
1736
"port")
2379
if server_settings["socket"]:
2380
server_settings["socket"] = server_config.getint("DEFAULT",
2381
"socket")
2382
# Later, stdin will, and stdout and stderr might, be dup'ed
2383
# over with an opened os.devnull. But we don't want this to
2384
# happen with a supplied network socket.
2385
if 0 <= server_settings["socket"] <= 2:
2386
server_settings["socket"] = os.dup(server_settings
2387
["socket"])
2388
1737
del server_config
2389
1738
2390
1739
# Override the settings from the config file with command line
2391
1740
# options, if set.
2392
1741
for option in ("interface", "address", "port", "debug",
2393
1742
"priority", "servicename", "configdir",
2394
"use_dbus", "use_ipv6", "debuglevel", "restore",
2395
"statedir", "socket", "foreground", "zeroconf"):
1743
"use_dbus", "use_ipv6", "debuglevel"):
2396
1744
value = getattr(options, option)
2397
1745
if value is not None:
2398
1746
server_settings[option] = value
2399
1747
del options
2400
1748
# Force all strings to be unicode
2401
1749
for option in server_settings.keys():
2402
if isinstance(server_settings[option], bytes):
2403
server_settings[option] = (server_settings[option]
2404
.decode("utf-8"))
2405
# Force all boolean options to be boolean
2406
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
"foreground", "zeroconf"):
2408
server_settings[option] = bool(server_settings[option])
2409
# Debug implies foreground
2410
if server_settings["debug"]:
2411
server_settings["foreground"] = True
1750
if type(server_settings[option]) is str:
1751
server_settings[option] = unicode(server_settings[option])
2412
1752
# Now we have our good server settings in "server_settings"
2413
1753
2414
1754
##################################################################
2415
1755
2416
if (not server_settings["zeroconf"] and
2417
not (server_settings["port"]
2418
or server_settings["socket"] != "")):
2419
parser.error("Needs port or socket to work without"
2420
" Zeroconf")
2421
2422
1756
# For convenience
2423
1757
debug = server_settings["debug"]
2424
1758
debuglevel = server_settings["debuglevel"]
2425
1759
use_dbus = server_settings["use_dbus"]
2426
1760
use_ipv6 = server_settings["use_ipv6"]
2427
stored_state_path = os.path.join(server_settings["statedir"],
2428
stored_state_file)
2429
foreground = server_settings["foreground"]
2430
zeroconf = server_settings["zeroconf"]
2431
2432
if debug:
2433
initlogger(debug, logging.DEBUG)
2434
else:
2435
if not debuglevel:
2436
initlogger(debug)
2437
else:
2438
level = getattr(logging, debuglevel.upper())
2439
initlogger(debug, level)
2440
1761
2441
1762
if server_settings["servicename"] != "Mandos":
2442
1763
syslogger.setFormatter(logging.Formatter
2443
('Mandos ({}) [%(process)d]:'
2444
' %(levelname)s: %(message)s'
2445
.format(server_settings
2446
["servicename"])))
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
2447
1767
2448
1768
# Parse config file with clients
2449
client_config = configparser.SafeConfigParser(Client
2450
.client_defaults)
1769
client_defaults = { "timeout": "1h",
1770
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
1772
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
2451
1777
client_config.read(os.path.join(server_settings["configdir"],
2452
1778
"clients.conf"))
2453
1779
2454
1780
global mandos_dbus_service
2455
1781
mandos_dbus_service = None
2456
1782
2457
socketfd = None
2458
if server_settings["socket"] != "":
2459
socketfd = server_settings["socket"]
2460
1783
tcp_server = MandosServer((server_settings["address"],
2461
1784
server_settings["port"]),
2462
1785
ClientHandler,
2465
1788
use_ipv6=use_ipv6,
2466
1789
gnutls_priority=
2467
1790
server_settings["priority"],
2468
use_dbus=use_dbus,
2469
socketfd=socketfd)
2470
if not foreground:
2471
pidfilename = "/run/mandos.pid"
2472
if not os.path.isdir("/run/."):
2473
pidfilename = "/var/run/mandos.pid"
2474
pidfile = None
1791
use_dbus=use_dbus)
1792
if not debug:
1793
pidfilename = "/var/run/mandos.pid"
2475
1794
try:
2476
1795
pidfile = open(pidfilename, "w")
2477
except IOError as e:
2478
logger.error("Could not open file %r", pidfilename,
2479
exc_info=e)
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
2480
1798
2481
for name in ("_mandos", "mandos", "nobody"):
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
2482
1803
try:
2483
uid = pwd.getpwnam(name).pw_uid
2484
gid = pwd.getpwnam(name).pw_gid
2485
break
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
2486
1806
except KeyError:
2487
continue
2488
else:
2489
uid = 65534
2490
gid = 65534
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
2491
1813
try:
2492
1814
os.setgid(gid)
2493
1815
os.setuid(uid)
2494
except OSError as error:
2495
if error.errno != errno.EPERM:
2496
raise
1816
except OSError, error:
1817
if error[0] != errno.EPERM:
1818
raise error
2497
1819
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
1827
2498
1828
if debug:
2499
1829
# Enable all possible GnuTLS debugging
2500
1830
2510
1840
.gnutls_global_set_log_function(debug_gnutls))
2511
1841
2512
1842
# Redirect stdin so all checkers get /dev/null
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2514
1844
os.dup2(null, sys.stdin.fileno())
2515
1845
if null > 2:
2516
1846
os.close(null)
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
2517
1850
2518
1851
# Need to fork before connecting to D-Bus
2519
if not foreground:
1852
if not debug:
2520
1853
# Close all input and output, do double fork, etc.
2521
1854
daemon()
2522
1855
2523
# multiprocessing will use threads, so before we use gobject we
2524
# need to inform gobject that threads will be used.
2525
gobject.threads_init()
2526
2527
1856
global main_loop
2528
1857
# From the Avahi example code
2529
DBusGMainLoop(set_as_default=True)
1858
DBusGMainLoop(set_as_default=True )
2530
1859
main_loop = gobject.MainLoop()
2531
1860
bus = dbus.SystemBus()
2532
1861
# End of Avahi example code
2533
1862
if use_dbus:
2534
1863
try:
2535
bus_name = dbus.service.BusName("se.recompile.Mandos",
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2536
1865
bus, do_not_queue=True)
2537
old_bus_name = (dbus.service.BusName
2538
("se.bsnet.fukt.Mandos", bus,
2539
do_not_queue=True))
2540
except dbus.exceptions.NameExistsException as e:
2541
logger.error("Disabling D-Bus:", exc_info=e)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
2542
1868
use_dbus = False
2543
1869
server_settings["use_dbus"] = False
2544
1870
tcp_server.use_dbus = False
2545
if zeroconf:
2546
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
2551
if server_settings["interface"]:
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
2554
.encode("utf-8")))
1871
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
1875
if server_settings["interface"]:
1876
service.interface = (if_nametoindex
1877
(str(server_settings["interface"])))
2555
1878
2556
1879
global multiprocessing_manager
2557
1880
multiprocessing_manager = multiprocessing.Manager()
2559
1882
client_class = Client
2560
1883
if use_dbus:
2561
1884
client_class = functools.partial(ClientDBus, bus = bus)
2562
2563
client_settings = Client.config_parser(client_config)
2564
old_client_settings = {}
2565
clients_data = {}
2566
2567
# This is used to redirect stdout and stderr for checker processes
2568
global wnull
2569
wnull = open(os.devnull, "w") # A writable /dev/null
2570
# Only used if server is running in foreground but not in debug
2571
# mode
2572
if debug or not foreground:
2573
wnull.close()
2574
2575
# Get client data and settings from last running state.
2576
if server_settings["restore"]:
2577
try:
2578
with open(stored_state_path, "rb") as stored_state:
2579
clients_data, old_client_settings = (pickle.load
2580
(stored_state))
2581
os.remove(stored_state_path)
2582
except IOError as e:
2583
if e.errno == errno.ENOENT:
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
2586
else:
2587
logger.critical("Could not load persistent state:",
2588
exc_info=e)
2589
raise
2590
except EOFError as e:
2591
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
2593
2594
with PGPEngine() as pgp:
2595
for client_name, client in clients_data.items():
2596
# Skip removed clients
2597
if client_name not in client_settings:
2598
continue
2599
2600
# Decide which value to use after restoring saved state.
2601
# We have three different values: Old config file,
2602
# new config file, and saved state.
2603
# New config value takes precedence if it differs from old
2604
# config value, otherwise use saved state.
2605
for name, value in client_settings[client_name].items():
2606
try:
2607
# For each value in new config, check if it
2608
# differs from the old config value (Except for
2609
# the "secret" attribute)
2610
if (name != "secret" and
2611
value != old_client_settings[client_name]
2612
[name]):
2613
client[name] = value
2614
except KeyError:
2615
pass
2616
2617
# Clients who has passed its expire date can still be
2618
# enabled if its last checker was successful. Clients
2619
# whose checker succeeded before we stored its state is
2620
# assumed to have successfully run all checkers during
2621
# downtime.
2622
if client["enabled"]:
2623
if datetime.datetime.utcnow() >= client["expires"]:
2624
if not client["last_checked_ok"]:
2625
logger.warning(
2626
"disabling client {} - Client never "
2627
"performed a successful checker"
2628
.format(client_name))
2629
client["enabled"] = False
2630
elif client["last_checker_status"] != 0:
2631
logger.warning(
2632
"disabling client {} - Client last"
2633
" checker failed with error code {}"
2634
.format(client_name,
2635
client["last_checker_status"]))
2636
client["enabled"] = False
2637
else:
2638
client["expires"] = (datetime.datetime
2639
.utcnow()
2640
+ client["timeout"])
2641
logger.debug("Last checker succeeded,"
2642
" keeping {} enabled"
2643
.format(client_name))
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
2644
1892
try:
2645
client["secret"] = (
2646
pgp.decrypt(client["encrypted_secret"],
2647
client_settings[client_name]
2648
["secret"]))
2649
except PGPError:
2650
# If decryption fails, we use secret from new settings
2651
logger.debug("Failed to decrypt {} old secret"
2652
.format(client_name))
2653
client["secret"] = (
2654
client_settings[client_name]["secret"])
2655
2656
# Add/remove clients based on new changes made to config
2657
for client_name in (set(old_client_settings)
2658
- set(client_settings)):
2659
del clients_data[client_name]
2660
for client_name in (set(client_settings)
2661
- set(old_client_settings)):
2662
clients_data[client_name] = client_settings[client_name]
2663
2664
# Create all client objects
2665
for client_name, client in clients_data.items():
2666
tcp_server.clients[client_name] = client_class(
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
2669
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
2670
1902
if not tcp_server.clients:
2671
1903
logger.warning("No clients defined")
2672
2673
if not foreground:
2674
if pidfile is not None:
2675
try:
2676
with pidfile:
2677
pid = os.getpid()
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
2679
except IOError:
2680
logger.error("Could not write to file %r with PID %d",
2681
pidfilename, pid)
2682
del pidfile
1904
1905
if not debug:
1906
try:
1907
with pidfile:
1908
pid = os.getpid()
1909
pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
del pidfile
1911
except IOError:
1912
logger.error("Could not write to file %r with PID %d",
1913
pidfilename, pid)
1914
except NameError:
1915
# "pidfile" was never created
1916
pass
2683
1917
del pidfilename
2684
1918
1919
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
2685
1921
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2686
1922
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2687
1923
2688
1924
if use_dbus:
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
1925
class MandosDBusService(dbus.service.Object):
2692
1926
"""A D-Bus proxy object"""
2693
1927
def __init__(self):
2694
1928
dbus.service.Object.__init__(self, bus, "/")
2695
_interface = "se.recompile.Mandos"
2696
2697
@dbus_interface_annotations(_interface)
2698
def _foo(self):
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
2701
"false"}
1929
_interface = "se.bsnet.fukt.Mandos"
2702
1930
2703
1931
@dbus.service.signal(_interface, signature="o")
2704
1932
def ClientAdded(self, objpath):
2719
1947
def GetAllClients(self):
2720
1948
"D-Bus method"
2721
1949
return dbus.Array(c.dbus_object_path
2722
for c in
2723
tcp_server.clients.itervalues())
1950
for c in tcp_server.clients)
2724
1951
2725
1952
@dbus.service.method(_interface,
2726
1953
out_signature="a{oa{sv}}")
2727
1954
def GetAllClientsWithProperties(self):
2728
1955
"D-Bus method"
2729
1956
return dbus.Dictionary(
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
1957
((c.dbus_object_path, c.GetAll(""))
1958
for c in tcp_server.clients),
2732
1959
signature="oa{sv}")
2733
1960
2734
1961
@dbus.service.method(_interface, in_signature="o")
2735
1962
def RemoveClient(self, object_path):
2736
1963
"D-Bus method"
2737
for c in tcp_server.clients.itervalues():
1964
for c in tcp_server.clients:
2738
1965
if c.dbus_object_path == object_path:
2739
del tcp_server.clients[c.name]
1966
tcp_server.clients.remove(c)
2740
1967
c.remove_from_connection()
2741
1968
# Don't signal anything except ClientRemoved
2742
1969
c.disable(quiet=True)
2751
1978
2752
1979
def cleanup():
2753
1980
"Cleanup function; run on exit"
2754
if zeroconf:
2755
service.cleanup()
2756
2757
multiprocessing.active_children()
2758
wnull.close()
2759
if not (tcp_server.clients or client_settings):
2760
return
2761
2762
# Store client before exiting. Secrets are encrypted with key
2763
# based on what config file has. If config file is
2764
# removed/edited, old secret will thus be unrecovable.
2765
clients = {}
2766
with PGPEngine() as pgp:
2767
for client in tcp_server.clients.itervalues():
2768
key = client_settings[client.name]["secret"]
2769
client.encrypted_secret = pgp.encrypt(client.secret,
2770
key)
2771
client_dict = {}
2772
2773
# A list of attributes that can not be pickled
2774
# + secret.
2775
exclude = { "bus", "changedstate", "secret",
2776
"checker", "server_settings" }
2777
for name, typ in (inspect.getmembers
2778
(dbus.service.Object)):
2779
exclude.add(name)
2780
2781
client_dict["encrypted_secret"] = (client
2782
.encrypted_secret)
2783
for attr in client.client_structure:
2784
if attr not in exclude:
2785
client_dict[attr] = getattr(client, attr)
2786
2787
clients[client.name] = client_dict
2788
del client_settings[client.name]["secret"]
2789
2790
try:
2791
with (tempfile.NamedTemporaryFile
2792
(mode='wb', suffix=".pickle", prefix='clients-',
2793
dir=os.path.dirname(stored_state_path),
2794
delete=False)) as stored_state:
2795
pickle.dump((clients, client_settings), stored_state)
2796
tempname=stored_state.name
2797
os.rename(tempname, stored_state_path)
2798
except (IOError, OSError) as e:
2799
if not debug:
2800
try:
2801
os.remove(tempname)
2802
except NameError:
2803
pass
2804
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2805
logger.warning("Could not save persistent state: {}"
2806
.format(os.strerror(e.errno)))
2807
else:
2808
logger.warning("Could not save persistent state:",
2809
exc_info=e)
2810
raise
2811
2812
# Delete all clients, and settings from config
1981
service.cleanup()
1982
2813
1983
while tcp_server.clients:
2814
name, client = tcp_server.clients.popitem()
1984
client = tcp_server.clients.pop()
2815
1985
if use_dbus:
2816
1986
client.remove_from_connection()
1987
client.disable_hook = None
2817
1988
# Don't signal anything except ClientRemoved
2818
1989
client.disable(quiet=True)
2819
1990
if use_dbus:
2820
1991
# Emit D-Bus signal
2821
mandos_dbus_service.ClientRemoved(client
2822
.dbus_object_path,
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2823
1993
client.name)
2824
client_settings.clear()
2825
1994
2826
1995
atexit.register(cleanup)
2827
1996
2828
for client in tcp_server.clients.itervalues():
1997
for client in tcp_server.clients:
2829
1998
if use_dbus:
2830
1999
# Emit D-Bus signal
2831
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2832
# Need to initiate checking of clients
2833
if client.enabled:
2834
client.init_checker()
2001
client.enable()
2835
2002
2836
2003
tcp_server.enable()
2837
2004
tcp_server.server_activate()
2838
2005
2839
2006
# Find out what port we got
2840
if zeroconf:
2841
service.port = tcp_server.socket.getsockname()[1]
2007
service.port = tcp_server.socket.getsockname()[1]
2842
2008
if use_ipv6:
2843
2009
logger.info("Now listening on address %r, port %d,"
2844
" flowinfo %d, scope_id %d",
2845
*tcp_server.socket.getsockname())
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
2846
2012
else: # IPv4
2847
logger.info("Now listening on address %r, port %d",
2848
*tcp_server.socket.getsockname())
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
2849
2015
2850
2016
#service.interface = tcp_server.socket.getsockname()[3]
2851
2017
2852
2018
try:
2853
if zeroconf:
2854
# From the Avahi example code
2855
try:
2856
service.activate()
2857
except dbus.exceptions.DBusException as error:
2858
logger.critical("D-Bus Exception", exc_info=error)
2859
cleanup()
2860
sys.exit(1)
2861
# End of Avahi example code
2019
# From the Avahi example code
2020
try:
2021
service.activate()
2022
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2024
cleanup()
2025
sys.exit(1)
2026
# End of Avahi example code
2862
2027
2863
2028
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2864
2029
lambda *args, **kwargs:
2867
2032
2868
2033
logger.debug("Starting main loop")
2869
2034
main_loop.run()
2870
except AvahiError as error:
2871
logger.critical("Avahi Error", exc_info=error)
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
2872
2037
cleanup()
2873
2038
sys.exit(1)
2874
2039
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0