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- Committer: Teddy Hogeborn
- Date: 2011-04-02 06:37:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20110402063718-13ldrcuu0t33sdc4
* mandos: Tolerate restarting Avahi servers. Also Changed to new
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/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 functools
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import cPickle as pickle
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import multiprocessing
67
import types
68
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
73
66
import dbus
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import dbus.service
88
81
except ImportError:
89
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SO_BINDTODEVICE = None
90
83
91
if sys.version_info.major == 2:
92
str = unicode
93
94
version = "1.6.8"
95
stored_state_file = "clients.pickle"
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97
logger = logging.getLogger()
98
syslogger = None
99
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:
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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
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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global syslogger
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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'))
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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'
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' [%(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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class PGPError(Exception):
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"""Exception if encryption/decryption fails"""
140
pass
141
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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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def __exit__(self, exc_type, exc_value, traceback):
157
self._cleanup()
158
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:
165
# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
169
os.remove(os.path.join(root, filename))
170
for dirname in dirs:
171
os.rmdir(os.path.join(root, dirname))
172
# 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
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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',
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'--passphrase-file',
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passfile.name]
196
+ self.gnupgargs,
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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',
213
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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85
version = "1.3.0"
86
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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)
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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
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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'.
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See <https://www.iana.org/assignments/service-names-port-numbers>
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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
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domain: string; Domain to publish on, default to .local if empty.
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server: D-Bus Server
256
135
bus: dbus.SystemBus()
257
136
"""
258
259
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768,
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self.server = None
275
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self.bus = bus
276
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self.entry_group_state_changed_match = None
277
278
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def rename(self):
279
156
"""Derived from the Avahi example code"""
280
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if self.rename_count >= self.max_renames:
282
159
" after %i retries, exiting.",
283
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self.rename_count)
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raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
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logger.info("Changing Zeroconf service name to %r ...",
288
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self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
168
% self.name))
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169
self.remove()
290
170
try:
291
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self.add()
292
172
except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
173
logger.critical("DBusException: %s", error)
294
174
self.cleanup()
295
175
os._exit(1)
296
176
self.rename_count += 1
297
298
177
def remove(self):
299
178
"""Derived from the Avahi example code"""
179
if self.group is not None:
180
try:
181
self.group.Free()
182
except (dbus.exceptions.UnknownMethodException,
183
dbus.exceptions.DBusException) as e:
184
pass
185
self.group = None
300
186
if self.entry_group_state_changed_match is not None:
301
187
self.entry_group_state_changed_match.remove()
302
188
self.entry_group_state_changed_match = None
303
if self.group is not None:
304
self.group.Reset()
305
306
189
def add(self):
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190
"""Derived from the Avahi example code"""
308
191
self.remove()
309
if self.group is None:
310
self.group = dbus.Interface(
311
self.bus.get_object(avahi.DBUS_NAME,
312
self.server.EntryGroupNew()),
313
avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
self.group = dbus.Interface(
193
self.bus.get_object(avahi.DBUS_NAME,
194
self.server.EntryGroupNew(),
195
follow_name_owner_changes=True),
196
avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
197
self.entry_group_state_changed_match = (
315
198
self.group.connect_to_signal(
316
'StateChanged', self.entry_group_state_changed))
199
'StateChanged', self .entry_group_state_changed))
317
200
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
201
self.name, self.type)
319
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self.group.AddService(
325
208
dbus.UInt16(self.port),
326
209
avahi.string_array_to_txt_array(self.TXT))
327
210
self.group.Commit()
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329
211
def entry_group_state_changed(self, state, error):
330
212
"""Derived from the Avahi example code"""
331
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logger.debug("Avahi entry group state change: %i", state)
337
219
self.rename()
338
220
elif state == avahi.ENTRY_GROUP_FAILURE:
339
221
logger.critical("Avahi: Error in group state changed %s",
340
str(error))
341
raise AvahiGroupError("State changed: {!s}"
342
.format(error))
343
222
unicode(error))
223
raise AvahiGroupError("State changed: %s"
224
% unicode(error))
344
225
def cleanup(self):
345
226
"""Derived from the Avahi example code"""
346
if self.group is not None:
347
try:
348
self.group.Free()
349
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
351
pass
352
self.group = None
353
227
self.remove()
354
355
228
def server_state_changed(self, state, error=None):
356
229
"""Derived from the Avahi example code"""
357
230
logger.debug("Avahi server state change: %i", state)
363
236
avahi.SERVER_FAILURE:
364
237
"Zeroconf server failure" }
365
238
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()
239
if bad_states[state]:
240
logger.error(bad_states[state])
241
self.remove()
372
242
elif state == avahi.SERVER_RUNNING:
373
243
self.add()
374
244
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
245
logger.debug("Unknown state: %r", state)
380
246
def activate(self):
381
247
"""Derived from the Avahi example code"""
382
248
if self.server is None:
390
256
self.server_state_changed(self.server.GetState())
391
257
392
258
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
259
class Client(object):
405
260
"""A representation of a client host served by this server.
406
261
407
262
Attributes:
408
approved: bool(); 'None' if not yet approved/disapproved
263
_approved: bool(); 'None' if not yet approved/disapproved
409
264
approval_delay: datetime.timedelta(); Time to wait for approval
410
265
approval_duration: datetime.timedelta(); Duration of one approval
411
266
checker: subprocess.Popen(); a running checker process used
418
273
instance %(name)s can be used in the command.
419
274
checker_initiator_tag: a gobject event source tag, or None
420
275
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
276
current_checker_command: string; current running checker_command
277
disable_hook: If set, called by disable() as disable_hook(self)
424
278
disable_initiator_tag: a gobject event source tag, or None
425
279
enabled: bool()
426
280
fingerprint: string (40 or 32 hexadecimal digits); used to
429
283
interval: datetime.timedelta(); How often to start a new checker
430
284
last_approval_request: datetime.datetime(); (UTC) or None
431
285
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
286
last_enabled: datetime.datetime(); (UTC)
436
287
name: string; from the config file, used in log messages and
437
288
D-Bus identifiers
438
289
secret: bytestring; sent verbatim (over TLS) to client
439
290
timeout: datetime.timedelta(); How long from last_checked_ok
440
291
until this client is disabled
441
extended_timeout: extra long timeout when secret has been sent
442
292
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
293
"""
447
294
448
295
runtime_expansions = ("approval_delay", "approval_duration",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
296
"created", "enabled", "fingerprint",
297
"host", "interval", "last_checked_ok",
452
298
"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
299
464
300
@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):
301
def _timedelta_to_milliseconds(td):
302
"Convert a datetime.timedelta() to milliseconds"
303
return ((td.days * 24 * 60 * 60 * 1000)
304
+ (td.seconds * 1000)
305
+ (td.microseconds // 1000))
306
307
def timeout_milliseconds(self):
308
"Return the 'timeout' attribute in milliseconds"
309
return self._timedelta_to_milliseconds(self.timeout)
310
311
def interval_milliseconds(self):
312
"Return the 'interval' attribute in milliseconds"
313
return self._timedelta_to_milliseconds(self.interval)
314
315
def approval_delay_milliseconds(self):
316
return self._timedelta_to_milliseconds(self.approval_delay)
317
318
def __init__(self, name = None, disable_hook=None, config=None):
319
"""Note: the 'checker' key in 'config' sets the
320
'checker_command' attribute and *not* the 'checker'
321
attribute."""
512
322
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
323
if config is None:
324
config = {}
530
325
logger.debug("Creating client %r", self.name)
531
326
# Uppercase and remove spaces from fingerprint for later
532
327
# comparison purposes with return value from the fingerprint()
533
328
# function
329
self.fingerprint = (config["fingerprint"].upper()
330
.replace(" ", ""))
534
331
logger.debug(" Fingerprint: %s", self.fingerprint)
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
537
538
# attributes specific for this server instance
332
if "secret" in config:
333
self.secret = config["secret"].decode("base64")
334
elif "secfile" in config:
335
with open(os.path.expanduser(os.path.expandvars
336
(config["secfile"])),
337
"rb") as secfile:
338
self.secret = secfile.read()
339
else:
340
raise TypeError("No secret or secfile for client %s"
341
% self.name)
342
self.host = config.get("host", "")
343
self.created = datetime.datetime.utcnow()
344
self.enabled = False
345
self.last_approval_request = None
346
self.last_enabled = None
347
self.last_checked_ok = None
348
self.timeout = string_to_delta(config["timeout"])
349
self.interval = string_to_delta(config["interval"])
350
self.disable_hook = disable_hook
539
351
self.checker = None
540
352
self.checker_initiator_tag = None
541
353
self.disable_initiator_tag = None
542
354
self.checker_callback_tag = None
355
self.checker_command = config["checker"]
543
356
self.current_checker_command = None
544
self.approved = None
357
self.last_connect = None
358
self._approved = None
359
self.approved_by_default = config.get("approved_by_default",
360
True)
545
361
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)
362
self.approval_delay = string_to_delta(
363
config["approval_delay"])
364
self.approval_duration = string_to_delta(
365
config["approval_duration"])
366
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
560
367
561
# Send notice to process children that client state has changed
562
368
def send_changedstate(self):
563
with self.changedstate:
564
self.changedstate.notify_all()
565
369
self.changedstate.acquire()
370
self.changedstate.notify_all()
371
self.changedstate.release()
372
566
373
def enable(self):
567
374
"""Start this client's checker and timeout hooks"""
568
375
if getattr(self, "enabled", False):
569
376
# Already enabled
570
377
return
571
self.expires = datetime.datetime.utcnow() + self.timeout
572
self.enabled = True
378
self.send_changedstate()
573
379
self.last_enabled = datetime.datetime.utcnow()
574
self.init_checker()
575
self.send_changedstate()
380
# Schedule a new checker to be started an 'interval' from now,
381
# and every interval from then on.
382
self.checker_initiator_tag = (gobject.timeout_add
383
(self.interval_milliseconds(),
384
self.start_checker))
385
# Schedule a disable() when 'timeout' has passed
386
self.disable_initiator_tag = (gobject.timeout_add
387
(self.timeout_milliseconds(),
388
self.disable))
389
self.enabled = True
390
# Also start a new checker *right now*.
391
self.start_checker()
576
392
577
393
def disable(self, quiet=True):
578
394
"""Disable this client."""
579
395
if not getattr(self, "enabled", False):
580
396
return False
581
397
if not quiet:
398
self.send_changedstate()
399
if not quiet:
582
400
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", None) is not None:
401
if getattr(self, "disable_initiator_tag", False):
584
402
gobject.source_remove(self.disable_initiator_tag)
585
403
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", None) is not None:
404
if getattr(self, "checker_initiator_tag", False):
588
405
gobject.source_remove(self.checker_initiator_tag)
589
406
self.checker_initiator_tag = None
590
407
self.stop_checker()
408
if self.disable_hook:
409
self.disable_hook(self)
591
410
self.enabled = False
592
if not quiet:
593
self.send_changedstate()
594
411
# Do not run this again if called by a gobject.timeout_add
595
412
return False
596
413
597
414
def __del__(self):
415
self.disable_hook = None
598
416
self.disable()
599
417
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
418
def checker_callback(self, pid, condition, command):
620
419
"""The checker has completed, so take appropriate actions."""
621
420
self.checker_callback_tag = None
622
421
self.checker = None
623
422
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
423
exitstatus = os.WEXITSTATUS(condition)
424
if exitstatus == 0:
626
425
logger.info("Checker for %(name)s succeeded",
627
426
vars(self))
628
427
self.checked_ok()
630
429
logger.info("Checker for %(name)s failed",
631
430
vars(self))
632
431
else:
633
self.last_checker_status = -1
634
432
logger.warning("Checker for %(name)s crashed?",
635
433
vars(self))
636
434
637
435
def checked_ok(self):
638
"""Assert that the client has been seen, alive and well."""
436
"""Bump up the timeout for this client.
437
438
This should only be called when the client has been seen,
439
alive and well.
440
"""
639
441
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
442
gobject.source_remove(self.disable_initiator_tag)
443
self.disable_initiator_tag = (gobject.timeout_add
444
(self.timeout_milliseconds(),
445
self.disable))
655
446
656
447
def need_approval(self):
657
448
self.last_approval_request = datetime.datetime.utcnow()
662
453
If a checker already exists, leave it running and do
663
454
nothing."""
664
455
# 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
456
# did that, then if a checker (for some reason) started
457
# running slowly and taking more than 'interval' time, the
458
# client would inevitably timeout, since no checker would get
459
# a chance to run to completion. If we instead leave running
669
460
# checkers alone, the checker would have to take more time
670
461
# than 'timeout' for the client to be disabled, which is as it
671
462
# should be.
673
464
# If a checker exists, make sure it is not a zombie
674
465
try:
675
466
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
467
except (AttributeError, OSError) as error:
468
if (isinstance(error, OSError)
469
and error.errno != errno.ECHILD):
470
raise error
681
471
else:
682
472
if pid:
683
473
logger.warning("Checker was a zombie")
686
476
self.current_checker_command)
687
477
# Start a new checker if needed
688
478
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
479
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
480
# In case checker_command has exactly one % operator
481
command = self.checker_command % self.host
482
except TypeError:
483
# Escape attributes for the shell
484
escaped_attrs = dict(
485
(attr,
486
re.escape(unicode(str(getattr(self, attr, "")),
487
errors=
488
'replace')))
489
for attr in
490
self.runtime_expansions)
491
492
try:
493
command = self.checker_command % escaped_attrs
494
except TypeError as error:
495
logger.error('Could not format string "%s":'
496
' %s', self.checker_command, error)
497
return True # Try again later
699
498
self.current_checker_command = command
700
499
try:
701
500
logger.info("Starting checker %r for %s",
704
503
# in normal mode, that is already done by daemon(),
705
504
# and in debug mode we don't want to. (Stdin is
706
505
# 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
506
self.checker = subprocess.Popen(command,
716
507
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:
508
shell=True, cwd="/")
509
self.checker_callback_tag = (gobject.child_watch_add
510
(self.checker.pid,
511
self.checker_callback,
512
data=command))
513
# The checker may have completed before the gobject
514
# watch was added. Check for this.
730
515
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
516
if pid:
517
gobject.source_remove(self.checker_callback_tag)
518
self.checker_callback(pid, status, command)
731
519
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)
520
logger.error("Failed to start subprocess: %s",
521
error)
741
522
# Re-run this periodically if run by gobject.timeout_add
742
523
return True
743
524
750
531
return
751
532
logger.debug("Stopping checker for %(name)s", vars(self))
752
533
try:
753
self.checker.terminate()
534
os.kill(self.checker.pid, signal.SIGTERM)
754
535
#time.sleep(0.5)
755
536
#if self.checker.poll() is None:
756
# self.checker.kill()
537
# os.kill(self.checker.pid, signal.SIGKILL)
757
538
except OSError as error:
758
539
if error.errno != errno.ESRCH: # No such process
759
540
raise
760
541
self.checker = None
761
542
762
763
543
def dbus_service_property(dbus_interface, signature="v",
764
544
access="readwrite", byte_arrays=False):
765
545
"""Decorators for marking methods of a DBusObjectWithProperties to
776
556
# "Set" method, so we fail early here:
777
557
if byte_arrays and signature != "ay":
778
558
raise ValueError("Byte arrays not supported for non-'ay'"
779
" signature {!r}".format(signature))
559
" signature %r" % signature)
780
560
def decorator(func):
781
561
func._dbus_is_property = True
782
562
func._dbus_interface = dbus_interface
790
570
return decorator
791
571
792
572
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
573
class DBusPropertyException(dbus.exceptions.DBusException):
831
574
"""A base class for D-Bus property-related exceptions
832
575
"""
833
pass
576
def __unicode__(self):
577
return unicode(str(self))
578
834
579
835
580
class DBusPropertyAccessException(DBusPropertyException):
836
581
"""A property's access permissions disallows an operation.
846
591
847
592
class DBusObjectWithProperties(dbus.service.Object):
848
593
"""A D-Bus object with properties.
849
594
850
595
Classes inheriting from this can use the dbus_service_property
851
596
decorator to expose methods as D-Bus properties. It exposes the
852
597
standard Get(), Set(), and GetAll() methods on the D-Bus.
853
598
"""
854
599
855
600
@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)
601
def _is_dbus_property(obj):
602
return getattr(obj, "_dbus_is_property", False)
864
603
865
def _get_all_dbus_things(self, thing):
604
def _get_all_dbus_properties(self):
866
605
"""Returns a generator of (name, attribute) pairs
867
606
"""
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)))
607
return ((prop._dbus_name, prop)
608
for name, prop in
609
inspect.getmembers(self, self._is_dbus_property))
875
610
876
611
def _get_dbus_property(self, interface_name, property_name):
877
612
"""Returns a bound method if one exists which is a D-Bus
878
613
property with the specified name and interface.
879
614
"""
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
615
for name in (property_name,
616
property_name + "_dbus_property"):
617
prop = getattr(self, name, None)
618
if (prop is None
619
or not self._is_dbus_property(prop)
620
or prop._dbus_name != property_name
621
or (interface_name and prop._dbus_interface
622
and interface_name != prop._dbus_interface)):
623
continue
624
return prop
888
625
# No such property
889
626
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
627
+ interface_name + "."
914
651
# The byte_arrays option is not supported yet on
915
652
# signatures other than "ay".
916
653
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))
654
raise ValueError
655
value = dbus.ByteArray(''.join(unichr(byte)
656
for byte in value))
922
657
prop(value)
923
658
924
659
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
926
661
def GetAll(self, interface_name):
927
662
"""Standard D-Bus property GetAll() method, see D-Bus
928
663
standard.
929
664
930
665
Note: Will not include properties with access="write".
931
666
"""
932
properties = {}
933
for name, prop in self._get_all_dbus_things("property"):
667
all = {}
668
for name, prop in self._get_all_dbus_properties():
934
669
if (interface_name
935
670
and interface_name != prop._dbus_interface):
936
671
# Interface non-empty but did not match
940
675
continue
941
676
value = prop()
942
677
if not hasattr(value, "variant_level"):
943
properties[name] = value
678
all[name] = value
944
679
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
680
all[name] = type(value)(value, variant_level=
681
value.variant_level+1)
682
return dbus.Dictionary(all, signature="sv")
956
683
957
684
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
958
685
out_signature="s",
959
686
path_keyword='object_path',
960
687
connection_keyword='connection')
961
688
def Introspect(self, object_path, connection):
962
"""Overloading of standard D-Bus method.
963
964
Inserts property tags and interface annotation tags.
689
"""Standard D-Bus method, overloaded to insert property tags.
965
690
"""
966
691
xmlstring = dbus.service.Object.Introspect(self, object_path,
967
692
connection)
974
699
e.setAttribute("access", prop._dbus_access)
975
700
return e
976
701
for if_tag in document.getElementsByTagName("interface"):
977
# Add property tags
978
702
for tag in (make_tag(document, name, prop)
979
703
for name, prop
980
in self._get_all_dbus_things("property")
704
in self._get_all_dbus_properties()
981
705
if prop._dbus_interface
982
706
== if_tag.getAttribute("name")):
983
707
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
708
# Add the names to the return values for the
1016
709
# "org.freedesktop.DBus.Properties" methods
1017
710
if (if_tag.getAttribute("name")
1032
725
except (AttributeError, xml.dom.DOMException,
1033
726
xml.parsers.expat.ExpatError) as error:
1034
727
logger.error("Failed to override Introspection method",
1035
exc_info=error)
728
error)
1036
729
return xmlstring
1037
730
1038
731
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
732
class ClientDBus(Client, DBusObjectWithProperties):
1219
733
"""A Client class using D-Bus
1220
734
1226
740
runtime_expansions = (Client.runtime_expansions
1227
741
+ ("dbus_object_path",))
1228
742
1229
_interface = "se.recompile.Mandos.Client"
1230
1231
743
# dbus.service.Object doesn't use super(), so we can't either.
1232
744
1233
745
def __init__(self, bus = None, *args, **kwargs):
746
self._approvals_pending = 0
1234
747
self.bus = bus
1235
748
Client.__init__(self, *args, **kwargs)
1236
749
# Only now, when this client is initialized, can it show up on
1237
750
# the D-Bus
1238
client_object_name = str(self.name).translate(
751
client_object_name = unicode(self.name).translate(
1239
752
{ord("."): ord("_"),
1240
753
ord("-"): ord("_")})
1241
754
self.dbus_object_path = (dbus.ObjectPath
1242
755
("/clients/" + client_object_name))
1243
756
DBusObjectWithProperties.__init__(self, self.bus,
1244
757
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
758
759
def _get_approvals_pending(self):
760
return self._approvals_pending
761
def _set_approvals_pending(self, value):
762
old_value = self._approvals_pending
763
self._approvals_pending = value
764
bval = bool(value)
765
if (hasattr(self, "dbus_object_path")
766
and bval is not bool(old_value)):
767
dbus_bool = dbus.Boolean(bval, variant_level=1)
768
self.PropertyChanged(dbus.String("ApprovalPending"),
769
dbus_bool)
770
771
approvals_pending = property(_get_approvals_pending,
772
_set_approvals_pending)
773
del _get_approvals_pending, _set_approvals_pending
774
775
@staticmethod
776
def _datetime_to_dbus(dt, variant_level=0):
777
"""Convert a UTC datetime.datetime() to a D-Bus type."""
778
return dbus.String(dt.isoformat(),
779
variant_level=variant_level)
780
781
def enable(self):
782
oldstate = getattr(self, "enabled", False)
783
r = Client.enable(self)
784
if oldstate != self.enabled:
785
# Emit D-Bus signals
786
self.PropertyChanged(dbus.String("Enabled"),
787
dbus.Boolean(True, variant_level=1))
788
self.PropertyChanged(
789
dbus.String("LastEnabled"),
790
self._datetime_to_dbus(self.last_enabled,
791
variant_level=1))
792
return r
793
794
def disable(self, quiet = False):
795
oldstate = getattr(self, "enabled", False)
796
r = Client.disable(self, quiet=quiet)
797
if not quiet and oldstate != self.enabled:
798
# Emit D-Bus signal
799
self.PropertyChanged(dbus.String("Enabled"),
800
dbus.Boolean(False, variant_level=1))
801
return r
1328
802
1329
803
def __del__(self, *args, **kwargs):
1330
804
try:
1339
813
*args, **kwargs):
1340
814
self.checker_callback_tag = None
1341
815
self.checker = None
816
# Emit D-Bus signal
817
self.PropertyChanged(dbus.String("CheckerRunning"),
818
dbus.Boolean(False, variant_level=1))
1342
819
if os.WIFEXITED(condition):
1343
820
exitstatus = os.WEXITSTATUS(condition)
1344
821
# Emit D-Bus signal
1354
831
return Client.checker_callback(self, pid, condition, command,
1355
832
*args, **kwargs)
1356
833
834
def checked_ok(self, *args, **kwargs):
835
Client.checked_ok(self, *args, **kwargs)
836
# Emit D-Bus signal
837
self.PropertyChanged(
838
dbus.String("LastCheckedOK"),
839
(self._datetime_to_dbus(self.last_checked_ok,
840
variant_level=1)))
841
842
def need_approval(self, *args, **kwargs):
843
r = Client.need_approval(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastApprovalRequest"),
847
(self._datetime_to_dbus(self.last_approval_request,
848
variant_level=1)))
849
return r
850
1357
851
def start_checker(self, *args, **kwargs):
1358
old_checker_pid = getattr(self.checker, "pid", None)
852
old_checker = self.checker
853
if self.checker is not None:
854
old_checker_pid = self.checker.pid
855
else:
856
old_checker_pid = None
1359
857
r = Client.start_checker(self, *args, **kwargs)
1360
858
# Only if new checker process was started
1361
859
if (self.checker is not None
1362
860
and old_checker_pid != self.checker.pid):
1363
861
# Emit D-Bus signal
1364
862
self.CheckerStarted(self.current_checker_command)
863
self.PropertyChanged(
864
dbus.String("CheckerRunning"),
865
dbus.Boolean(True, variant_level=1))
1365
866
return r
1366
867
868
def stop_checker(self, *args, **kwargs):
869
old_checker = getattr(self, "checker", None)
870
r = Client.stop_checker(self, *args, **kwargs)
871
if (old_checker is not None
872
and getattr(self, "checker", None) is None):
873
self.PropertyChanged(dbus.String("CheckerRunning"),
874
dbus.Boolean(False, variant_level=1))
875
return r
876
1367
877
def _reset_approved(self):
1368
self.approved = None
878
self._approved = None
1369
879
return False
1370
880
1371
881
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
882
self.send_changedstate()
883
self._approved = value
884
gobject.timeout_add(self._timedelta_to_milliseconds
885
(self.approval_duration),
886
self._reset_approved)
887
1376
888
1377
889
## D-Bus methods, signals & properties
1378
1379
## Interfaces
890
_interface = "se.bsnet.fukt.Mandos.Client"
1380
891
1381
892
## Signals
1382
893
1393
904
pass
1394
905
1395
906
# PropertyChanged - signal
1396
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1397
907
@dbus.service.signal(_interface, signature="sv")
1398
908
def PropertyChanged(self, property, value):
1399
909
"D-Bus signal"
1469
979
if value is None: # get
1470
980
return dbus.Boolean(self.approved_by_default)
1471
981
self.approved_by_default = bool(value)
982
# Emit D-Bus signal
983
self.PropertyChanged(dbus.String("ApprovedByDefault"),
984
dbus.Boolean(value, variant_level=1))
1472
985
1473
986
# ApprovalDelay - property
1474
987
@dbus_service_property(_interface, signature="t",
1475
988
access="readwrite")
1476
989
def ApprovalDelay_dbus_property(self, value=None):
1477
990
if value is None: # get
1478
return dbus.UInt64(self.approval_delay.total_seconds()
1479
* 1000)
991
return dbus.UInt64(self.approval_delay_milliseconds())
1480
992
self.approval_delay = datetime.timedelta(0, 0, 0, value)
993
# Emit D-Bus signal
994
self.PropertyChanged(dbus.String("ApprovalDelay"),
995
dbus.UInt64(value, variant_level=1))
1481
996
1482
997
# ApprovalDuration - property
1483
998
@dbus_service_property(_interface, signature="t",
1484
999
access="readwrite")
1485
1000
def ApprovalDuration_dbus_property(self, value=None):
1486
1001
if value is None: # get
1487
return dbus.UInt64(self.approval_duration.total_seconds()
1488
* 1000)
1002
return dbus.UInt64(self._timedelta_to_milliseconds(
1003
self.approval_duration))
1489
1004
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1005
# Emit D-Bus signal
1006
self.PropertyChanged(dbus.String("ApprovalDuration"),
1007
dbus.UInt64(value, variant_level=1))
1490
1008
1491
1009
# Name - property
1492
1010
@dbus_service_property(_interface, signature="s", access="read")
1504
1022
def Host_dbus_property(self, value=None):
1505
1023
if value is None: # get
1506
1024
return dbus.String(self.host)
1507
self.host = str(value)
1025
self.host = value
1026
# Emit D-Bus signal
1027
self.PropertyChanged(dbus.String("Host"),
1028
dbus.String(value, variant_level=1))
1508
1029
1509
1030
# Created - property
1510
1031
@dbus_service_property(_interface, signature="s", access="read")
1511
1032
def Created_dbus_property(self):
1512
return datetime_to_dbus(self.created)
1033
return dbus.String(self._datetime_to_dbus(self.created))
1513
1034
1514
1035
# LastEnabled - property
1515
1036
@dbus_service_property(_interface, signature="s", access="read")
1516
1037
def LastEnabled_dbus_property(self):
1517
return datetime_to_dbus(self.last_enabled)
1038
if self.last_enabled is None:
1039
return dbus.String("")
1040
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1518
1041
1519
1042
# Enabled - property
1520
1043
@dbus_service_property(_interface, signature="b",
1534
1057
if value is not None:
1535
1058
self.checked_ok()
1536
1059
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)
1060
if self.last_checked_ok is None:
1061
return dbus.String("")
1062
return dbus.String(self._datetime_to_dbus(self
1063
.last_checked_ok))
1549
1064
1550
1065
# LastApprovalRequest - property
1551
1066
@dbus_service_property(_interface, signature="s", access="read")
1552
1067
def LastApprovalRequest_dbus_property(self):
1553
return datetime_to_dbus(self.last_approval_request)
1068
if self.last_approval_request is None:
1069
return dbus.String("")
1070
return dbus.String(self.
1071
_datetime_to_dbus(self
1072
.last_approval_request))
1554
1073
1555
1074
# Timeout - property
1556
1075
@dbus_service_property(_interface, signature="t",
1557
1076
access="readwrite")
1558
1077
def Timeout_dbus_property(self, value=None):
1559
1078
if value is None: # get
1560
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1561
old_timeout = self.timeout
1079
return dbus.UInt64(self.timeout_milliseconds())
1562
1080
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)
1081
# Emit D-Bus signal
1082
self.PropertyChanged(dbus.String("Timeout"),
1083
dbus.UInt64(value, variant_level=1))
1084
if getattr(self, "disable_initiator_tag", None) is None:
1085
return
1086
# Reschedule timeout
1087
gobject.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
1089
time_to_die = (self.
1090
_timedelta_to_milliseconds((self
1091
.last_checked_ok
1092
+ self.timeout)
1093
- datetime.datetime
1094
.utcnow()))
1095
if time_to_die <= 0:
1096
# The timeout has passed
1097
self.disable()
1098
else:
1099
self.disable_initiator_tag = (gobject.timeout_add
1100
(time_to_die, self.disable))
1588
1101
1589
1102
# Interval - property
1590
1103
@dbus_service_property(_interface, signature="t",
1591
1104
access="readwrite")
1592
1105
def Interval_dbus_property(self, value=None):
1593
1106
if value is None: # get
1594
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
1595
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Interval"),
1111
dbus.UInt64(value, variant_level=1))
1596
1112
if getattr(self, "checker_initiator_tag", None) is None:
1597
1113
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
1114
# Reschedule checker run
1115
gobject.source_remove(self.checker_initiator_tag)
1116
self.checker_initiator_tag = (gobject.timeout_add
1117
(value, self.start_checker))
1118
self.start_checker() # Start one now, too
1119
1605
1120
# Checker - property
1606
1121
@dbus_service_property(_interface, signature="s",
1607
1122
access="readwrite")
1608
1123
def Checker_dbus_property(self, value=None):
1609
1124
if value is None: # get
1610
1125
return dbus.String(self.checker_command)
1611
self.checker_command = str(value)
1126
self.checker_command = value
1127
# Emit D-Bus signal
1128
self.PropertyChanged(dbus.String("Checker"),
1129
dbus.String(self.checker_command,
1130
variant_level=1))
1612
1131
1613
1132
# CheckerRunning - property
1614
1133
@dbus_service_property(_interface, signature="b",
1630
1149
@dbus_service_property(_interface, signature="ay",
1631
1150
access="write", byte_arrays=True)
1632
1151
def Secret_dbus_property(self, value):
1633
self.secret = bytes(value)
1152
self.secret = str(value)
1634
1153
1635
1154
del _interface
1636
1155
1641
1160
self._pipe.send(('init', fpr, address))
1642
1161
if not self._pipe.recv():
1643
1162
raise KeyError()
1644
1163
1645
1164
def __getattribute__(self, name):
1646
if name == '_pipe':
1165
if(name == '_pipe'):
1647
1166
return super(ProxyClient, self).__getattribute__(name)
1648
1167
self._pipe.send(('getattr', name))
1649
1168
data = self._pipe.recv()
1654
1173
self._pipe.send(('funcall', name, args, kwargs))
1655
1174
return self._pipe.recv()[1]
1656
1175
return func
1657
1176
1658
1177
def __setattr__(self, name, value):
1659
if name == '_pipe':
1178
if(name == '_pipe'):
1660
1179
return super(ProxyClient, self).__setattr__(name, value)
1661
1180
self._pipe.send(('setattr', name, value))
1662
1181
1670
1189
def handle(self):
1671
1190
with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
1191
logger.info("TCP connection from: %s",
1673
str(self.client_address))
1192
unicode(self.client_address))
1674
1193
logger.debug("Pipe FD: %d",
1675
1194
self.server.child_pipe.fileno())
1676
1195
1677
1196
session = (gnutls.connection
1678
1197
.ClientSession(self.request,
1679
1198
gnutls.connection
1680
1199
.X509Credentials()))
1681
1200
1682
1201
# Note: gnutls.connection.X509Credentials is really a
1683
1202
# generic GnuTLS certificate credentials object so long as
1684
1203
# no X.509 keys are added to it. Therefore, we can use it
1685
1204
# here despite using OpenPGP certificates.
1686
1205
1687
1206
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
1207
# "+AES-256-CBC", "+SHA1",
1689
1208
# "+COMP-NULL", "+CTYPE-OPENPGP",
1695
1214
(gnutls.library.functions
1696
1215
.gnutls_priority_set_direct(session._c_object,
1697
1216
priority, None))
1698
1217
1699
1218
# Start communication using the Mandos protocol
1700
1219
# Get protocol number
1701
1220
line = self.request.makefile().readline()
1702
1221
logger.debug("Protocol version: %r", line)
1703
1222
try:
1704
1223
if int(line.strip().split()[0]) > 1:
1705
raise RuntimeError(line)
1224
raise RuntimeError
1706
1225
except (ValueError, IndexError, RuntimeError) as error:
1707
1226
logger.error("Unknown protocol version: %s", error)
1708
1227
return
1709
1228
1710
1229
# Start GnuTLS connection
1711
1230
try:
1712
1231
session.handshake()
1716
1235
# established. Just abandon the request.
1717
1236
return
1718
1237
logger.debug("Handshake succeeded")
1719
1238
1720
1239
approval_required = False
1721
1240
try:
1722
1241
try:
1727
1246
logger.warning("Bad certificate: %s", error)
1728
1247
return
1729
1248
logger.debug("Fingerprint: %s", fpr)
1730
1249
1731
1250
try:
1732
1251
client = ProxyClient(child_pipe, fpr,
1733
1252
self.client_address)
1741
1260
1742
1261
while True:
1743
1262
if not client.enabled:
1744
logger.info("Client %s is disabled",
1263
logger.warning("Client %s is disabled",
1745
1264
client.name)
1746
1265
if self.server.use_dbus:
1747
1266
# Emit D-Bus signal
1748
client.Rejected("Disabled")
1267
client.Rejected("Disabled")
1749
1268
return
1750
1269
1751
if client.approved or not client.approval_delay:
1270
if client._approved or not client.approval_delay:
1752
1271
#We are approved or approval is disabled
1753
1272
break
1754
elif client.approved is None:
1273
elif client._approved is None:
1755
1274
logger.info("Client %s needs approval",
1756
1275
client.name)
1757
1276
if self.server.use_dbus:
1758
1277
# Emit D-Bus signal
1759
1278
client.NeedApproval(
1760
client.approval_delay.total_seconds()
1761
* 1000, client.approved_by_default)
1279
client.approval_delay_milliseconds(),
1280
client.approved_by_default)
1762
1281
else:
1763
1282
logger.warning("Client %s was not approved",
1764
1283
client.name)
1768
1287
return
1769
1288
1770
1289
#wait until timeout or approved
1290
#x = float(client._timedelta_to_milliseconds(delay))
1771
1291
time = datetime.datetime.now()
1772
1292
client.changedstate.acquire()
1773
client.changedstate.wait(delay.total_seconds())
1293
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1774
1294
client.changedstate.release()
1775
1295
time2 = datetime.datetime.now()
1776
1296
if (time2 - time) >= delay:
1792
1312
try:
1793
1313
sent = session.send(client.secret[sent_size:])
1794
1314
except gnutls.errors.GNUTLSError as error:
1795
logger.warning("gnutls send failed",
1796
exc_info=error)
1315
logger.warning("gnutls send failed")
1797
1316
return
1798
1317
logger.debug("Sent: %d, remaining: %d",
1799
1318
sent, len(client.secret)
1800
1319
- (sent_size + sent))
1801
1320
sent_size += sent
1802
1321
1803
1322
logger.info("Sending secret to %s", client.name)
1804
# bump the timeout using extended_timeout
1805
client.bump_timeout(client.extended_timeout)
1323
# bump the timeout as if seen
1324
client.checked_ok()
1806
1325
if self.server.use_dbus:
1807
1326
# Emit D-Bus signal
1808
1327
client.GotSecret()
1813
1332
try:
1814
1333
session.bye()
1815
1334
except gnutls.errors.GNUTLSError as error:
1816
logger.warning("GnuTLS bye failed",
1817
exc_info=error)
1335
logger.warning("GnuTLS bye failed")
1818
1336
1819
1337
@staticmethod
1820
1338
def peer_certificate(session):
1876
1394
# Convert the buffer to a Python bytestring
1877
1395
fpr = ctypes.string_at(buf, buf_len.value)
1878
1396
# Convert the bytestring to hexadecimal notation
1879
hex_fpr = binascii.hexlify(fpr).upper()
1397
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1880
1398
return hex_fpr
1881
1399
1882
1400
1885
1403
def sub_process_main(self, request, address):
1886
1404
try:
1887
1405
self.finish_request(request, address)
1888
except Exception:
1406
except:
1889
1407
self.handle_error(request, address)
1890
1408
self.close_request(request)
1891
1409
1892
1410
def process_request(self, request, address):
1893
1411
"""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
1412
multiprocessing.Process(target = self.sub_process_main,
1413
args = (request, address)).start()
1899
1414
1900
1415
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1901
1416
""" adds a pipe to the MixIn """
1905
1420
This function creates a new pipe in self.pipe
1906
1421
"""
1907
1422
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1908
1909
proc = MultiprocessingMixIn.process_request(self, request,
1910
client_address)
1423
1424
super(MultiprocessingMixInWithPipe,
1425
self).process_request(request, client_address)
1911
1426
self.child_pipe.close()
1912
self.add_pipe(parent_pipe, proc)
1913
1914
def add_pipe(self, parent_pipe, proc):
1427
self.add_pipe(parent_pipe)
1428
1429
def add_pipe(self, parent_pipe):
1915
1430
"""Dummy function; override as necessary"""
1916
raise NotImplementedError()
1917
1431
raise NotImplementedError
1918
1432
1919
1433
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1920
1434
socketserver.TCPServer, object):
1926
1440
use_ipv6: Boolean; to use IPv6 or not
1927
1441
"""
1928
1442
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
"""
1443
interface=None, use_ipv6=True):
1933
1444
self.interface = interface
1934
1445
if use_ipv6:
1935
1446
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
1447
socketserver.TCPServer.__init__(self, server_address,
1963
1448
RequestHandlerClass)
1964
1965
1449
def server_bind(self):
1966
1450
"""This overrides the normal server_bind() function
1967
1451
to bind to an interface if one was specified, and also NOT to
1975
1459
try:
1976
1460
self.socket.setsockopt(socket.SOL_SOCKET,
1977
1461
SO_BINDTODEVICE,
1978
(self.interface + "\0")
1979
.encode("utf-8"))
1462
str(self.interface
1463
+ '\0'))
1980
1464
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:
1465
if error[0] == errno.EPERM:
1466
logger.error("No permission to"
1467
" bind to interface %s",
1468
self.interface)
1469
elif error[0] == errno.ENOPROTOOPT:
1985
1470
logger.error("SO_BINDTODEVICE not available;"
1986
1471
" cannot bind to interface %s",
1987
1472
self.interface)
1988
elif error.errno == errno.ENODEV:
1989
logger.error("Interface %s does not exist,"
1990
" cannot bind", self.interface)
1991
1473
else:
1992
1474
raise
1993
1475
# Only bind(2) the socket if we really need to.
1996
1478
if self.address_family == socket.AF_INET6:
1997
1479
any_address = "::" # in6addr_any
1998
1480
else:
1999
any_address = "0.0.0.0" # INADDR_ANY
1481
any_address = socket.INADDR_ANY
2000
1482
self.server_address = (any_address,
2001
1483
self.server_address[1])
2002
1484
elif not self.server_address[1]:
2023
1505
"""
2024
1506
def __init__(self, server_address, RequestHandlerClass,
2025
1507
interface=None, use_ipv6=True, clients=None,
2026
gnutls_priority=None, use_dbus=True, socketfd=None):
1508
gnutls_priority=None, use_dbus=True):
2027
1509
self.enabled = False
2028
1510
self.clients = clients
2029
1511
if self.clients is None:
2030
self.clients = {}
1512
self.clients = set()
2031
1513
self.use_dbus = use_dbus
2032
1514
self.gnutls_priority = gnutls_priority
2033
1515
IPv6_TCPServer.__init__(self, server_address,
2034
1516
RequestHandlerClass,
2035
1517
interface = interface,
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
1518
use_ipv6 = use_ipv6)
2038
1519
def server_activate(self):
2039
1520
if self.enabled:
2040
1521
return socketserver.TCPServer.server_activate(self)
2041
2042
1522
def enable(self):
2043
1523
self.enabled = True
2044
2045
def add_pipe(self, parent_pipe, proc):
1524
def add_pipe(self, parent_pipe):
2046
1525
# Call "handle_ipc" for both data and EOF events
2047
1526
gobject.io_add_watch(parent_pipe.fileno(),
2048
1527
gobject.IO_IN | gobject.IO_HUP,
2049
1528
functools.partial(self.handle_ipc,
2050
parent_pipe =
2051
parent_pipe,
2052
proc = proc))
2053
1529
parent_pipe = parent_pipe))
1530
2054
1531
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()
1532
client_object=None):
1533
condition_names = {
1534
gobject.IO_IN: "IN", # There is data to read.
1535
gobject.IO_OUT: "OUT", # Data can be written (without
1536
# blocking).
1537
gobject.IO_PRI: "PRI", # There is urgent data to read.
1538
gobject.IO_ERR: "ERR", # Error condition.
1539
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1540
# broken, usually for pipes and
1541
# sockets).
1542
}
1543
conditions_string = ' | '.join(name
1544
for cond, name in
1545
condition_names.iteritems()
1546
if cond & condition)
1547
# error or the other end of multiprocessing.Pipe has closed
1548
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2060
1549
return False
2061
1550
2062
1551
# Read a request from the child
2067
1556
fpr = request[1]
2068
1557
address = request[2]
2069
1558
2070
for c in self.clients.itervalues():
1559
for c in self.clients:
2071
1560
if c.fingerprint == fpr:
2072
1561
client = c
2073
1562
break
2074
1563
else:
2075
logger.info("Client not found for fingerprint: %s, ad"
2076
"dress: %s", fpr, address)
1564
logger.warning("Client not found for fingerprint: %s, ad"
1565
"dress: %s", fpr, address)
2077
1566
if self.use_dbus:
2078
1567
# Emit D-Bus signal
2079
mandos_dbus_service.ClientNotFound(fpr,
2080
address[0])
1568
mandos_dbus_service.ClientNotFound(fpr, address[0])
2081
1569
parent_pipe.send(False)
2082
1570
return False
2083
1571
2084
1572
gobject.io_add_watch(parent_pipe.fileno(),
2085
1573
gobject.IO_IN | gobject.IO_HUP,
2086
1574
functools.partial(self.handle_ipc,
2087
parent_pipe =
2088
parent_pipe,
2089
proc = proc,
2090
client_object =
2091
client))
1575
parent_pipe = parent_pipe,
1576
client_object = client))
2092
1577
parent_pipe.send(True)
2093
# remove the old hook in favor of the new above hook on
2094
# same fileno
1578
# remove the old hook in favor of the new above hook on same fileno
2095
1579
return False
2096
1580
if command == 'funcall':
2097
1581
funcname = request[1]
2098
1582
args = request[2]
2099
1583
kwargs = request[3]
2100
1584
2101
parent_pipe.send(('data', getattr(client_object,
2102
funcname)(*args,
2103
**kwargs)))
2104
1585
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1586
2105
1587
if command == 'getattr':
2106
1588
attrname = request[1]
2107
1589
if callable(client_object.__getattribute__(attrname)):
2108
1590
parent_pipe.send(('function',))
2109
1591
else:
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
1592
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2112
1593
2113
1594
if command == 'setattr':
2114
1595
attrname = request[1]
2115
1596
value = request[2]
2116
1597
setattr(client_object, attrname, value)
2117
1598
2118
1599
return True
2119
1600
2120
1601
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
1602
def string_to_delta(interval):
2221
1603
"""Parse a string and return a datetime.timedelta
2222
1604
2233
1615
>>> string_to_delta('5m 30s')
2234
1616
datetime.timedelta(0, 330)
2235
1617
"""
2236
2237
try:
2238
return rfc3339_duration_to_delta(interval)
2239
except ValueError:
2240
pass
2241
2242
1618
timevalue = datetime.timedelta(0)
2243
1619
for s in interval.split():
2244
1620
try:
2245
suffix = s[-1]
1621
suffix = unicode(s[-1])
2246
1622
value = int(s[:-1])
2247
1623
if suffix == "d":
2248
1624
delta = datetime.timedelta(value)
2255
1631
elif suffix == "w":
2256
1632
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2257
1633
else:
2258
raise ValueError("Unknown suffix {!r}"
2259
.format(suffix))
2260
except IndexError as e:
1634
raise ValueError("Unknown suffix %r" % suffix)
1635
except (ValueError, IndexError) as e:
2261
1636
raise ValueError(*(e.args))
2262
1637
timevalue += delta
2263
1638
return timevalue
2264
1639
2265
1640
1641
def if_nametoindex(interface):
1642
"""Call the C function if_nametoindex(), or equivalent
1643
1644
Note: This function cannot accept a unicode string."""
1645
global if_nametoindex
1646
try:
1647
if_nametoindex = (ctypes.cdll.LoadLibrary
1648
(ctypes.util.find_library("c"))
1649
.if_nametoindex)
1650
except (OSError, AttributeError):
1651
logger.warning("Doing if_nametoindex the hard way")
1652
def if_nametoindex(interface):
1653
"Get an interface index the hard way, i.e. using fcntl()"
1654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1655
with contextlib.closing(socket.socket()) as s:
1656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1657
struct.pack(str("16s16x"),
1658
interface))
1659
interface_index = struct.unpack(str("I"),
1660
ifreq[16:20])[0]
1661
return interface_index
1662
return if_nametoindex(interface)
1663
1664
2266
1665
def daemon(nochdir = False, noclose = False):
2267
1666
"""See daemon(3). Standard BSD Unix function.
2268
1667
2276
1675
sys.exit()
2277
1676
if not noclose:
2278
1677
# Close all standard open file descriptors
2279
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1678
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2280
1679
if not stat.S_ISCHR(os.fstat(null).st_mode):
2281
raise OSError(errno.ENODEV, "{} not a character device"
2282
.format(os.devnull))
1680
raise OSError(errno.ENODEV,
1681
"%s not a character device"
1682
% os.path.devnull)
2283
1683
os.dup2(null, sys.stdin.fileno())
2284
1684
os.dup2(null, sys.stdout.fileno())
2285
1685
os.dup2(null, sys.stderr.fileno())
2294
1694
2295
1695
parser = argparse.ArgumentParser()
2296
1696
parser.add_argument("-v", "--version", action="version",
2297
version = "%(prog)s {}".format(version),
1697
version = "%%(prog)s %s" % version,
2298
1698
help="show version number and exit")
2299
1699
parser.add_argument("-i", "--interface", metavar="IF",
2300
1700
help="Bind to interface IF")
2306
1706
help="Run self-test")
2307
1707
parser.add_argument("--debug", action="store_true",
2308
1708
help="Debug mode; run in foreground and log"
2309
" to terminal", default=None)
1709
" to terminal")
2310
1710
parser.add_argument("--debuglevel", metavar="LEVEL",
2311
1711
help="Debug level for stdout output")
2312
1712
parser.add_argument("--priority", help="GnuTLS"
2319
1719
" files")
2320
1720
parser.add_argument("--no-dbus", action="store_false",
2321
1721
dest="use_dbus", help="Do not provide D-Bus"
2322
" system bus interface", default=None)
1722
" system bus interface")
2323
1723
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
1724
dest="use_ipv6", help="Do not use IPv6")
2340
1725
options = parser.parse_args()
2341
1726
2342
1727
if options.check:
2343
1728
import doctest
2344
fail_count, test_count = doctest.testmod()
2345
sys.exit(os.EX_OK if fail_count == 0 else 1)
1729
doctest.testmod()
1730
sys.exit()
2346
1731
2347
1732
# Default values for config file for server-global settings
2348
1733
server_defaults = { "interface": "",
2350
1735
"port": "",
2351
1736
"debug": "False",
2352
1737
"priority":
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1738
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2354
1739
"servicename": "Mandos",
2355
1740
"use_dbus": "True",
2356
1741
"use_ipv6": "True",
2357
1742
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
2362
"zeroconf": "True",
2363
1743
}
2364
1744
2365
1745
# Parse config file for server-global settings
2370
1750
# Convert the SafeConfigParser object to a dict
2371
1751
server_settings = server_config.defaults()
2372
1752
# Use the appropriate methods on the non-string config options
2373
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1753
for option in ("debug", "use_dbus", "use_ipv6"):
2374
1754
server_settings[option] = server_config.getboolean("DEFAULT",
2375
1755
option)
2376
1756
if server_settings["port"]:
2377
1757
server_settings["port"] = server_config.getint("DEFAULT",
2378
1758
"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
1759
del server_config
2389
1760
2390
1761
# Override the settings from the config file with command line
2391
1762
# options, if set.
2392
1763
for option in ("interface", "address", "port", "debug",
2393
1764
"priority", "servicename", "configdir",
2394
"use_dbus", "use_ipv6", "debuglevel", "restore",
2395
"statedir", "socket", "foreground", "zeroconf"):
1765
"use_dbus", "use_ipv6", "debuglevel"):
2396
1766
value = getattr(options, option)
2397
1767
if value is not None:
2398
1768
server_settings[option] = value
2399
1769
del options
2400
1770
# Force all strings to be unicode
2401
1771
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
1772
if type(server_settings[option]) is str:
1773
server_settings[option] = unicode(server_settings[option])
2412
1774
# Now we have our good server settings in "server_settings"
2413
1775
2414
1776
##################################################################
2415
1777
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
1778
# For convenience
2423
1779
debug = server_settings["debug"]
2424
1780
debuglevel = server_settings["debuglevel"]
2425
1781
use_dbus = server_settings["use_dbus"]
2426
1782
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
1783
2441
1784
if server_settings["servicename"] != "Mandos":
2442
1785
syslogger.setFormatter(logging.Formatter
2443
('Mandos ({}) [%(process)d]:'
2444
' %(levelname)s: %(message)s'
2445
.format(server_settings
2446
["servicename"])))
1786
('Mandos (%s) [%%(process)d]:'
1787
' %%(levelname)s: %%(message)s'
1788
% server_settings["servicename"]))
2447
1789
2448
1790
# Parse config file with clients
2449
client_config = configparser.SafeConfigParser(Client
2450
.client_defaults)
1791
client_defaults = { "timeout": "1h",
1792
"interval": "5m",
1793
"checker": "fping -q -- %%(host)s",
1794
"host": "",
1795
"approval_delay": "0s",
1796
"approval_duration": "1s",
1797
}
1798
client_config = configparser.SafeConfigParser(client_defaults)
2451
1799
client_config.read(os.path.join(server_settings["configdir"],
2452
1800
"clients.conf"))
2453
1801
2454
1802
global mandos_dbus_service
2455
1803
mandos_dbus_service = None
2456
1804
2457
socketfd = None
2458
if server_settings["socket"] != "":
2459
socketfd = server_settings["socket"]
2460
1805
tcp_server = MandosServer((server_settings["address"],
2461
1806
server_settings["port"]),
2462
1807
ClientHandler,
2465
1810
use_ipv6=use_ipv6,
2466
1811
gnutls_priority=
2467
1812
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
1813
use_dbus=use_dbus)
1814
if not debug:
1815
pidfilename = "/var/run/mandos.pid"
2475
1816
try:
2476
1817
pidfile = open(pidfilename, "w")
2477
except IOError as e:
2478
logger.error("Could not open file %r", pidfilename,
2479
exc_info=e)
1818
except IOError:
1819
logger.error("Could not open file %r", pidfilename)
2480
1820
2481
for name in ("_mandos", "mandos", "nobody"):
1821
try:
1822
uid = pwd.getpwnam("_mandos").pw_uid
1823
gid = pwd.getpwnam("_mandos").pw_gid
1824
except KeyError:
2482
1825
try:
2483
uid = pwd.getpwnam(name).pw_uid
2484
gid = pwd.getpwnam(name).pw_gid
2485
break
1826
uid = pwd.getpwnam("mandos").pw_uid
1827
gid = pwd.getpwnam("mandos").pw_gid
2486
1828
except KeyError:
2487
continue
2488
else:
2489
uid = 65534
2490
gid = 65534
1829
try:
1830
uid = pwd.getpwnam("nobody").pw_uid
1831
gid = pwd.getpwnam("nobody").pw_gid
1832
except KeyError:
1833
uid = 65534
1834
gid = 65534
2491
1835
try:
2492
1836
os.setgid(gid)
2493
1837
os.setuid(uid)
2494
1838
except OSError as error:
2495
if error.errno != errno.EPERM:
2496
raise
1839
if error[0] != errno.EPERM:
1840
raise error
2497
1841
1842
if not debug and not debuglevel:
1843
syslogger.setLevel(logging.WARNING)
1844
console.setLevel(logging.WARNING)
1845
if debuglevel:
1846
level = getattr(logging, debuglevel.upper())
1847
syslogger.setLevel(level)
1848
console.setLevel(level)
1849
2498
1850
if debug:
2499
1851
# Enable all possible GnuTLS debugging
2500
1852
2510
1862
.gnutls_global_set_log_function(debug_gnutls))
2511
1863
2512
1864
# Redirect stdin so all checkers get /dev/null
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1865
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2514
1866
os.dup2(null, sys.stdin.fileno())
2515
1867
if null > 2:
2516
1868
os.close(null)
1869
else:
1870
# No console logging
1871
logger.removeHandler(console)
2517
1872
2518
1873
# Need to fork before connecting to D-Bus
2519
if not foreground:
1874
if not debug:
2520
1875
# Close all input and output, do double fork, etc.
2521
1876
daemon()
2522
1877
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
1878
global main_loop
2528
1879
# From the Avahi example code
2529
DBusGMainLoop(set_as_default=True)
1880
DBusGMainLoop(set_as_default=True )
2530
1881
main_loop = gobject.MainLoop()
2531
1882
bus = dbus.SystemBus()
2532
1883
# End of Avahi example code
2533
1884
if use_dbus:
2534
1885
try:
2535
bus_name = dbus.service.BusName("se.recompile.Mandos",
1886
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2536
1887
bus, do_not_queue=True)
2537
old_bus_name = (dbus.service.BusName
2538
("se.bsnet.fukt.Mandos", bus,
2539
do_not_queue=True))
2540
1888
except dbus.exceptions.NameExistsException as e:
2541
logger.error("Disabling D-Bus:", exc_info=e)
1889
logger.error(unicode(e) + ", disabling D-Bus")
2542
1890
use_dbus = False
2543
1891
server_settings["use_dbus"] = False
2544
1892
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")))
1893
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1894
service = AvahiService(name = server_settings["servicename"],
1895
servicetype = "_mandos._tcp",
1896
protocol = protocol, bus = bus)
1897
if server_settings["interface"]:
1898
service.interface = (if_nametoindex
1899
(str(server_settings["interface"])))
2555
1900
2556
1901
global multiprocessing_manager
2557
1902
multiprocessing_manager = multiprocessing.Manager()
2559
1904
client_class = Client
2560
1905
if use_dbus:
2561
1906
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))
1907
def client_config_items(config, section):
1908
special_settings = {
1909
"approved_by_default":
1910
lambda: config.getboolean(section,
1911
"approved_by_default"),
1912
}
1913
for name, value in config.items(section):
2644
1914
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
1915
yield (name, special_settings[name]())
1916
except KeyError:
1917
yield (name, value)
1918
1919
tcp_server.clients.update(set(
1920
client_class(name = section,
1921
config= dict(client_config_items(
1922
client_config, section)))
1923
for section in client_config.sections()))
2670
1924
if not tcp_server.clients:
2671
1925
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
1926
1927
if not debug:
1928
try:
1929
with pidfile:
1930
pid = os.getpid()
1931
pidfile.write(str(pid) + "\n".encode("utf-8"))
1932
del pidfile
1933
except IOError:
1934
logger.error("Could not write to file %r with PID %d",
1935
pidfilename, pid)
1936
except NameError:
1937
# "pidfile" was never created
1938
pass
2683
1939
del pidfilename
2684
1940
1941
signal.signal(signal.SIGINT, signal.SIG_IGN)
1942
2685
1943
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2686
1944
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2687
1945
2688
1946
if use_dbus:
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
1947
class MandosDBusService(dbus.service.Object):
2692
1948
"""A D-Bus proxy object"""
2693
1949
def __init__(self):
2694
1950
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"}
1951
_interface = "se.bsnet.fukt.Mandos"
2702
1952
2703
1953
@dbus.service.signal(_interface, signature="o")
2704
1954
def ClientAdded(self, objpath):
2719
1969
def GetAllClients(self):
2720
1970
"D-Bus method"
2721
1971
return dbus.Array(c.dbus_object_path
2722
for c in
2723
tcp_server.clients.itervalues())
1972
for c in tcp_server.clients)
2724
1973
2725
1974
@dbus.service.method(_interface,
2726
1975
out_signature="a{oa{sv}}")
2727
1976
def GetAllClientsWithProperties(self):
2728
1977
"D-Bus method"
2729
1978
return dbus.Dictionary(
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
1979
((c.dbus_object_path, c.GetAll(""))
1980
for c in tcp_server.clients),
2732
1981
signature="oa{sv}")
2733
1982
2734
1983
@dbus.service.method(_interface, in_signature="o")
2735
1984
def RemoveClient(self, object_path):
2736
1985
"D-Bus method"
2737
for c in tcp_server.clients.itervalues():
1986
for c in tcp_server.clients:
2738
1987
if c.dbus_object_path == object_path:
2739
del tcp_server.clients[c.name]
1988
tcp_server.clients.remove(c)
2740
1989
c.remove_from_connection()
2741
1990
# Don't signal anything except ClientRemoved
2742
1991
c.disable(quiet=True)
2751
2000
2752
2001
def cleanup():
2753
2002
"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
2003
service.cleanup()
2004
2813
2005
while tcp_server.clients:
2814
name, client = tcp_server.clients.popitem()
2006
client = tcp_server.clients.pop()
2815
2007
if use_dbus:
2816
2008
client.remove_from_connection()
2009
client.disable_hook = None
2817
2010
# Don't signal anything except ClientRemoved
2818
2011
client.disable(quiet=True)
2819
2012
if use_dbus:
2820
2013
# Emit D-Bus signal
2821
mandos_dbus_service.ClientRemoved(client
2822
.dbus_object_path,
2014
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2823
2015
client.name)
2824
client_settings.clear()
2825
2016
2826
2017
atexit.register(cleanup)
2827
2018
2828
for client in tcp_server.clients.itervalues():
2019
for client in tcp_server.clients:
2829
2020
if use_dbus:
2830
2021
# Emit D-Bus signal
2831
2022
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2832
# Need to initiate checking of clients
2833
if client.enabled:
2834
client.init_checker()
2023
client.enable()
2835
2024
2836
2025
tcp_server.enable()
2837
2026
tcp_server.server_activate()
2838
2027
2839
2028
# Find out what port we got
2840
if zeroconf:
2841
service.port = tcp_server.socket.getsockname()[1]
2029
service.port = tcp_server.socket.getsockname()[1]
2842
2030
if use_ipv6:
2843
2031
logger.info("Now listening on address %r, port %d,"
2844
" flowinfo %d, scope_id %d",
2845
*tcp_server.socket.getsockname())
2032
" flowinfo %d, scope_id %d"
2033
% tcp_server.socket.getsockname())
2846
2034
else: # IPv4
2847
logger.info("Now listening on address %r, port %d",
2848
*tcp_server.socket.getsockname())
2035
logger.info("Now listening on address %r, port %d"
2036
% tcp_server.socket.getsockname())
2849
2037
2850
2038
#service.interface = tcp_server.socket.getsockname()[3]
2851
2039
2852
2040
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
2041
# From the Avahi example code
2042
try:
2043
service.activate()
2044
except dbus.exceptions.DBusException as error:
2045
logger.critical("DBusException: %s", error)
2046
cleanup()
2047
sys.exit(1)
2048
# End of Avahi example code
2862
2049
2863
2050
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2864
2051
lambda *args, **kwargs:
2868
2055
logger.debug("Starting main loop")
2869
2056
main_loop.run()
2870
2057
except AvahiError as error:
2871
logger.critical("Avahi Error", exc_info=error)
2058
logger.critical("AvahiError: %s", error)
2872
2059
cleanup()
2873
2060
sys.exit(1)
2874
2061
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0