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- Committer: teddy at bsnet
- Date: 2011-03-15 19:15:24 UTC
- Revision ID: teddy@fukt.bsnet.se-20110315191524-jc3ajgqu2za7dcly
* mandos: Use the new argparse library instead of optparse.
* debian/control (mandos): Depend on python (<=2.7) | python-argparse
* debian/control (mandos): Depend on python (<=2.7) | python-argparse
- 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
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import types
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import binascii
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import tempfile
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import itertools
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import collections
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65
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import dbus
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import dbus.service
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except ImportError:
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SO_BINDTODEVICE = None
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83
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version = "1.6.8"
92
stored_state_file = "clients.pickle"
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logger = logging.getLogger()
95
syslogger = None
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try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(str("16s16x"),
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interface))
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interface_index = struct.unpack(str("I"),
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ifreq[16:20])[0]
111
return interface_index
112
113
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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
118
syslogger = (logging.handlers.SysLogHandler
119
(facility =
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logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
124
' %(message)s'))
125
logger.addHandler(syslogger)
126
127
if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
130
' [%(process)d]:'
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' %(levelname)s:'
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' %(message)s'))
133
logger.addHandler(console)
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logger.setLevel(level)
135
136
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class PGPError(Exception):
138
"""Exception if encryption/decryption fails"""
139
pass
140
141
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class PGPEngine(object):
143
"""A simple class for OpenPGP symmetric encryption & decryption"""
144
def __init__(self):
145
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gnupgargs = ['--batch',
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'--home', self.tempdir,
148
'--force-mdc',
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'--quiet',
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'--no-use-agent']
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def __enter__(self):
153
return self
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155
def __exit__(self, exc_type, exc_value, traceback):
156
self._cleanup()
157
return False
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159
def __del__(self):
160
self._cleanup()
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def _cleanup(self):
163
if self.tempdir is not None:
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# Delete contents of tempdir
165
for root, dirs, files in os.walk(self.tempdir,
166
topdown = False):
167
for filename in files:
168
os.remove(os.path.join(root, filename))
169
for dirname in dirs:
170
os.rmdir(os.path.join(root, dirname))
171
# Remove tempdir
172
os.rmdir(self.tempdir)
173
self.tempdir = None
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def password_encode(self, password):
176
# Passphrase can not be empty and can not contain newlines or
177
# NUL bytes. So we prefix it and hex encode it.
178
encoded = b"mandos" + binascii.hexlify(password)
179
if len(encoded) > 2048:
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# GnuPG can't handle long passwords, so encode differently
181
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
182
.replace(b"\n", b"\\n")
183
.replace(b"\0", b"\\x00"))
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return encoded
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186
def encrypt(self, data, password):
187
passphrase = self.password_encode(password)
188
with tempfile.NamedTemporaryFile(dir=self.tempdir
189
) as passfile:
190
passfile.write(passphrase)
191
passfile.flush()
192
proc = subprocess.Popen(['gpg', '--symmetric',
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'--passphrase-file',
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passfile.name]
195
+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
199
ciphertext, err = proc.communicate(input = data)
200
if proc.returncode != 0:
201
raise PGPError(err)
202
return ciphertext
203
204
def decrypt(self, data, password):
205
passphrase = self.password_encode(password)
206
with tempfile.NamedTemporaryFile(dir = self.tempdir
207
) as passfile:
208
passfile.write(passphrase)
209
passfile.flush()
210
proc = subprocess.Popen(['gpg', '--decrypt',
211
'--passphrase-file',
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passfile.name]
213
+ self.gnupgargs,
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stdin = subprocess.PIPE,
215
stdout = subprocess.PIPE,
216
stderr = subprocess.PIPE)
217
decrypted_plaintext, err = proc.communicate(input
218
= data)
219
if proc.returncode != 0:
220
raise PGPError(err)
221
return decrypted_plaintext
222
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version = "1.3.0"
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#logger = logging.getLogger('mandos')
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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
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('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
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' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
223
102
224
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class AvahiError(Exception):
225
104
def __init__(self, value, *args, **kwargs):
243
122
Used to optionally bind to the specified interface.
244
123
name: string; Example: 'Mandos'
245
124
type: string; Example: '_mandos._tcp'.
246
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
247
126
port: integer; what port to announce
248
127
TXT: list of strings; TXT record for the service
249
128
domain: string; Domain to publish on, default to .local if empty.
255
134
server: D-Bus Server
256
135
bus: dbus.SystemBus()
257
136
"""
258
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137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
138
servicetype = None, port = None, TXT = None,
261
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domain = "", host = "", max_renames = 32768,
273
151
self.group = None # our entry group
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self.server = None
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self.bus = bus
276
self.entry_group_state_changed_match = None
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def rename(self):
279
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"""Derived from the Avahi example code"""
280
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if self.rename_count >= self.max_renames:
282
158
" after %i retries, exiting.",
283
159
self.rename_count)
284
160
raise AvahiServiceError("Too many renames")
285
self.name = unicode(self.server
286
.GetAlternativeServiceName(self.name))
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
287
162
logger.info("Changing Zeroconf service name to %r ...",
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self.name)
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syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
167
% self.name))
289
168
self.remove()
290
169
try:
291
170
self.add()
292
except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
294
173
self.cleanup()
295
174
os._exit(1)
296
175
self.rename_count += 1
297
298
176
def remove(self):
299
177
"""Derived from the Avahi example code"""
300
if self.entry_group_state_changed_match is not None:
301
self.entry_group_state_changed_match.remove()
302
self.entry_group_state_changed_match = None
303
178
if self.group is not None:
304
179
self.group.Reset()
305
306
180
def add(self):
307
181
"""Derived from the Avahi example code"""
308
self.remove()
309
182
if self.group is None:
310
183
self.group = dbus.Interface(
311
184
self.bus.get_object(avahi.DBUS_NAME,
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185
self.server.EntryGroupNew()),
313
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
self.entry_group_state_changed_match = (
315
self.group.connect_to_signal(
316
'StateChanged', self.entry_group_state_changed))
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
317
190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
191
self.name, self.type)
319
192
self.group.AddService(
325
198
dbus.UInt16(self.port),
326
199
avahi.string_array_to_txt_array(self.TXT))
327
200
self.group.Commit()
328
329
201
def entry_group_state_changed(self, state, error):
330
202
"""Derived from the Avahi example code"""
331
203
logger.debug("Avahi entry group state change: %i", state)
338
210
elif state == avahi.ENTRY_GROUP_FAILURE:
339
211
logger.critical("Avahi: Error in group state changed %s",
340
212
unicode(error))
341
raise AvahiGroupError("State changed: {!s}"
342
.format(error))
343
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
344
215
def cleanup(self):
345
216
"""Derived from the Avahi example code"""
346
217
if self.group is not None:
347
try:
348
self.group.Free()
349
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
351
pass
218
self.group.Free()
352
219
self.group = None
353
self.remove()
354
355
def server_state_changed(self, state, error=None):
220
def server_state_changed(self, state):
356
221
"""Derived from the Avahi example code"""
357
222
logger.debug("Avahi server state change: %i", state)
358
bad_states = { avahi.SERVER_INVALID:
359
"Zeroconf server invalid",
360
avahi.SERVER_REGISTERING: None,
361
avahi.SERVER_COLLISION:
362
"Zeroconf server name collision",
363
avahi.SERVER_FAILURE:
364
"Zeroconf server failure" }
365
if state in bad_states:
366
if bad_states[state] is not None:
367
if error is None:
368
logger.error(bad_states[state])
369
else:
370
logger.error(bad_states[state] + ": %r", error)
371
self.cleanup()
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
372
226
elif state == avahi.SERVER_RUNNING:
373
227
self.add()
374
else:
375
if error is None:
376
logger.debug("Unknown state: %r", state)
377
else:
378
logger.debug("Unknown state: %r: %r", state, error)
379
380
228
def activate(self):
381
229
"""Derived from the Avahi example code"""
382
230
if self.server is None:
383
231
self.server = dbus.Interface(
384
232
self.bus.get_object(avahi.DBUS_NAME,
385
avahi.DBUS_PATH_SERVER,
386
follow_name_owner_changes=True),
233
avahi.DBUS_PATH_SERVER),
387
234
avahi.DBUS_INTERFACE_SERVER)
388
235
self.server.connect_to_signal("StateChanged",
389
236
self.server_state_changed)
390
237
self.server_state_changed(self.server.GetState())
391
238
392
239
393
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
401
return ret
402
403
404
240
class Client(object):
405
241
"""A representation of a client host served by this server.
406
242
407
243
Attributes:
408
approved: bool(); 'None' if not yet approved/disapproved
244
_approved: bool(); 'None' if not yet approved/disapproved
409
245
approval_delay: datetime.timedelta(); Time to wait for approval
410
246
approval_duration: datetime.timedelta(); Duration of one approval
411
247
checker: subprocess.Popen(); a running checker process used
418
254
instance %(name)s can be used in the command.
419
255
checker_initiator_tag: a gobject event source tag, or None
420
256
created: datetime.datetime(); (UTC) object creation
421
client_structure: Object describing what attributes a client has
422
and is used for storing the client at exit
423
257
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
424
259
disable_initiator_tag: a gobject event source tag, or None
425
260
enabled: bool()
426
261
fingerprint: string (40 or 32 hexadecimal digits); used to
429
264
interval: datetime.timedelta(); How often to start a new checker
430
265
last_approval_request: datetime.datetime(); (UTC) or None
431
266
last_checked_ok: datetime.datetime(); (UTC) or None
432
last_checker_status: integer between 0 and 255 reflecting exit
433
status of last checker. -1 reflects crashed
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
436
268
name: string; from the config file, used in log messages and
437
269
D-Bus identifiers
438
270
secret: bytestring; sent verbatim (over TLS) to client
439
271
timeout: datetime.timedelta(); How long from last_checked_ok
440
272
until this client is disabled
441
extended_timeout: extra long timeout when secret has been sent
442
273
runtime_expansions: Allowed attributes for runtime expansion.
443
expires: datetime.datetime(); time (UTC) when a client will be
444
disabled, or None
445
server_settings: The server_settings dict from main()
446
274
"""
447
275
448
276
runtime_expansions = ("approval_delay", "approval_duration",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
452
279
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
455
"interval": "PT2M",
456
"checker": "fping -q -- %%(host)s",
457
"host": "",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
461
"enabled": "True",
462
}
463
280
464
281
@staticmethod
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
471
"""
472
settings = {}
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
476
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
482
"enabled")
483
484
client["fingerprint"] = (section["fingerprint"].upper()
485
.replace(" ", ""))
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
491
"rb") as secfile:
492
client["secret"] = secfile.read()
493
else:
494
raise TypeError("No secret or secfile for section {}"
495
.format(section))
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
508
509
return settings
510
511
def __init__(self, settings, name = None, server_settings=None):
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
287
288
def timeout_milliseconds(self):
289
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
291
292
def interval_milliseconds(self):
293
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
296
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
512
303
self.name = name
513
if server_settings is None:
514
server_settings = {}
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
519
520
if self.enabled:
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
525
+ self.timeout)
526
else:
527
self.last_enabled = None
528
self.expires = None
529
304
if config is None:
305
config = {}
530
306
logger.debug("Creating client %r", self.name)
531
307
# Uppercase and remove spaces from fingerprint for later
532
308
# comparison purposes with return value from the fingerprint()
533
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
534
312
logger.debug(" Fingerprint: %s", self.fingerprint)
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
537
538
# attributes specific for this server instance
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
539
332
self.checker = None
540
333
self.checker_initiator_tag = None
541
334
self.disable_initiator_tag = None
542
335
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
543
337
self.current_checker_command = None
544
self.approved = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
545
342
self.approvals_pending = 0
546
self.changedstate = (multiprocessing_manager
547
.Condition(multiprocessing_manager
548
.Lock()))
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
551
if not attr.startswith("_")]
552
self.client_structure.append("client_structure")
553
554
for name, t in inspect.getmembers(type(self),
555
lambda obj:
556
isinstance(obj,
557
property)):
558
if not name.startswith("_"):
559
self.client_structure.append(name)
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
560
348
561
# Send notice to process children that client state has changed
562
349
def send_changedstate(self):
563
with self.changedstate:
564
self.changedstate.notify_all()
565
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
566
354
def enable(self):
567
355
"""Start this client's checker and timeout hooks"""
568
356
if getattr(self, "enabled", False):
569
357
# Already enabled
570
358
return
571
self.expires = datetime.datetime.utcnow() + self.timeout
572
self.enabled = True
359
self.send_changedstate()
573
360
self.last_enabled = datetime.datetime.utcnow()
574
self.init_checker()
575
self.send_changedstate()
361
# Schedule a new checker to be started an 'interval' from now,
362
# and every interval from then on.
363
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
365
self.start_checker))
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
369
self.disable))
370
self.enabled = True
371
# Also start a new checker *right now*.
372
self.start_checker()
576
373
577
374
def disable(self, quiet=True):
578
375
"""Disable this client."""
579
376
if not getattr(self, "enabled", False):
580
377
return False
581
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
582
381
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", None) is not None:
382
if getattr(self, "disable_initiator_tag", False):
584
383
gobject.source_remove(self.disable_initiator_tag)
585
384
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", None) is not None:
385
if getattr(self, "checker_initiator_tag", False):
588
386
gobject.source_remove(self.checker_initiator_tag)
589
387
self.checker_initiator_tag = None
590
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
591
391
self.enabled = False
592
if not quiet:
593
self.send_changedstate()
594
392
# Do not run this again if called by a gobject.timeout_add
595
393
return False
596
394
597
395
def __del__(self):
396
self.disable_hook = None
598
397
self.disable()
599
398
600
def init_checker(self):
601
# Schedule a new checker to be started an 'interval' from now,
602
# and every interval from then on.
603
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
606
(int(self.interval
607
.total_seconds() * 1000),
608
self.start_checker))
609
# Schedule a disable() when 'timeout' has passed
610
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
613
(int(self.timeout
614
.total_seconds() * 1000),
615
self.disable))
616
# Also start a new checker *right now*.
617
self.start_checker()
618
619
399
def checker_callback(self, pid, condition, command):
620
400
"""The checker has completed, so take appropriate actions."""
621
401
self.checker_callback_tag = None
622
402
self.checker = None
623
403
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
626
406
logger.info("Checker for %(name)s succeeded",
627
407
vars(self))
628
408
self.checked_ok()
630
410
logger.info("Checker for %(name)s failed",
631
411
vars(self))
632
412
else:
633
self.last_checker_status = -1
634
413
logger.warning("Checker for %(name)s crashed?",
635
414
vars(self))
636
415
637
416
def checked_ok(self):
638
"""Assert that the client has been seen, alive and well."""
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
639
422
self.last_checked_ok = datetime.datetime.utcnow()
640
self.last_checker_status = 0
641
self.bump_timeout()
642
643
def bump_timeout(self, timeout=None):
644
"""Bump up the timeout for this client."""
645
if timeout is None:
646
timeout = self.timeout
647
if self.disable_initiator_tag is not None:
648
gobject.source_remove(self.disable_initiator_tag)
649
self.disable_initiator_tag = None
650
if getattr(self, "enabled", False):
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
654
self.expires = datetime.datetime.utcnow() + timeout
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
655
427
656
428
def need_approval(self):
657
429
self.last_approval_request = datetime.datetime.utcnow()
662
434
If a checker already exists, leave it running and do
663
435
nothing."""
664
436
# The reason for not killing a running checker is that if we
665
# did that, and if a checker (for some reason) started running
666
# slowly and taking more than 'interval' time, then the client
667
# would inevitably timeout, since no checker would get a
668
# chance to run to completion. If we instead leave running
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
669
441
# checkers alone, the checker would have to take more time
670
442
# than 'timeout' for the client to be disabled, which is as it
671
443
# should be.
673
445
# If a checker exists, make sure it is not a zombie
674
446
try:
675
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
677
pass
678
except OSError as error:
679
if error.errno != errno.ECHILD:
680
raise
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
681
452
else:
682
453
if pid:
683
454
logger.warning("Checker was a zombie")
686
457
self.current_checker_command)
687
458
# Start a new checker if needed
688
459
if self.checker is None:
689
# Escape attributes for the shell
690
escaped_attrs = { attr:
691
re.escape(unicode(getattr(self,
692
attr)))
693
for attr in self.runtime_expansions }
694
460
try:
695
command = self.checker_command % escaped_attrs
696
except TypeError as error:
697
logger.error('Could not format string "%s"',
698
self.checker_command, exc_info=error)
699
return True # Try again later
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
700
479
self.current_checker_command = command
701
480
try:
702
481
logger.info("Starting checker %r for %s",
705
484
# in normal mode, that is already done by daemon(),
706
485
# and in debug mode we don't want to. (Stdin is
707
486
# always replaced by /dev/null.)
708
# The exception is when not debugging but nevertheless
709
# running in the foreground; use the previously
710
# created wnull.
711
popen_args = {}
712
if (not self.server_settings["debug"]
713
and self.server_settings["foreground"]):
714
popen_args.update({"stdout": wnull,
715
"stderr": wnull })
716
487
self.checker = subprocess.Popen(command,
717
488
close_fds=True,
718
shell=True, cwd="/",
719
**popen_args)
720
except OSError as error:
721
logger.error("Failed to start subprocess",
722
exc_info=error)
723
return True
724
self.checker_callback_tag = (gobject.child_watch_add
725
(self.checker.pid,
726
self.checker_callback,
727
data=command))
728
# The checker may have completed before the gobject
729
# watch was added. Check for this.
730
try:
489
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
731
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
732
except OSError as error:
733
if error.errno == errno.ECHILD:
734
# This should never happen
735
logger.error("Child process vanished",
736
exc_info=error)
737
return True
738
raise
739
if pid:
740
gobject.source_remove(self.checker_callback_tag)
741
self.checker_callback(pid, status, command)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
742
503
# Re-run this periodically if run by gobject.timeout_add
743
504
return True
744
505
751
512
return
752
513
logger.debug("Stopping checker for %(name)s", vars(self))
753
514
try:
754
self.checker.terminate()
515
os.kill(self.checker.pid, signal.SIGTERM)
755
516
#time.sleep(0.5)
756
517
#if self.checker.poll() is None:
757
# self.checker.kill()
758
except OSError as error:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
759
520
if error.errno != errno.ESRCH: # No such process
760
521
raise
761
522
self.checker = None
762
523
763
764
524
def dbus_service_property(dbus_interface, signature="v",
765
525
access="readwrite", byte_arrays=False):
766
526
"""Decorators for marking methods of a DBusObjectWithProperties to
777
537
# "Set" method, so we fail early here:
778
538
if byte_arrays and signature != "ay":
779
539
raise ValueError("Byte arrays not supported for non-'ay'"
780
" signature {!r}".format(signature))
540
" signature %r" % signature)
781
541
def decorator(func):
782
542
func._dbus_is_property = True
783
543
func._dbus_interface = dbus_interface
791
551
return decorator
792
552
793
553
794
def dbus_interface_annotations(dbus_interface):
795
"""Decorator for marking functions returning interface annotations
796
797
Usage:
798
799
@dbus_interface_annotations("org.example.Interface")
800
def _foo(self): # Function name does not matter
801
return {"org.freedesktop.DBus.Deprecated": "true",
802
"org.freedesktop.DBus.Property.EmitsChangedSignal":
803
"false"}
804
"""
805
def decorator(func):
806
func._dbus_is_interface = True
807
func._dbus_interface = dbus_interface
808
func._dbus_name = dbus_interface
809
return func
810
return decorator
811
812
813
def dbus_annotations(annotations):
814
"""Decorator to annotate D-Bus methods, signals or properties
815
Usage:
816
817
@dbus_service_property("org.example.Interface", signature="b",
818
access="r")
819
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
820
"org.freedesktop.DBus.Property."
821
"EmitsChangedSignal": "false"})
822
def Property_dbus_property(self):
823
return dbus.Boolean(False)
824
"""
825
def decorator(func):
826
func._dbus_annotations = annotations
827
return func
828
return decorator
829
830
831
554
class DBusPropertyException(dbus.exceptions.DBusException):
832
555
"""A base class for D-Bus property-related exceptions
833
556
"""
849
572
850
573
class DBusObjectWithProperties(dbus.service.Object):
851
574
"""A D-Bus object with properties.
852
575
853
576
Classes inheriting from this can use the dbus_service_property
854
577
decorator to expose methods as D-Bus properties. It exposes the
855
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
856
579
"""
857
580
858
581
@staticmethod
859
def _is_dbus_thing(thing):
860
"""Returns a function testing if an attribute is a D-Bus thing
861
862
If called like _is_dbus_thing("method") it returns a function
863
suitable for use as predicate to inspect.getmembers().
864
"""
865
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
866
False)
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
867
584
868
def _get_all_dbus_things(self, thing):
585
def _get_all_dbus_properties(self):
869
586
"""Returns a generator of (name, attribute) pairs
870
587
"""
871
return ((getattr(athing.__get__(self), "_dbus_name",
872
name),
873
athing.__get__(self))
874
for cls in self.__class__.__mro__
875
for name, athing in
876
inspect.getmembers(cls,
877
self._is_dbus_thing(thing)))
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
878
591
879
592
def _get_dbus_property(self, interface_name, property_name):
880
593
"""Returns a bound method if one exists which is a D-Bus
881
594
property with the specified name and interface.
882
595
"""
883
for cls in self.__class__.__mro__:
884
for name, value in (inspect.getmembers
885
(cls,
886
self._is_dbus_thing("property"))):
887
if (value._dbus_name == property_name
888
and value._dbus_interface == interface_name):
889
return value.__get__(self)
890
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
891
606
# No such property
892
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
893
608
+ interface_name + "."
917
632
# The byte_arrays option is not supported yet on
918
633
# signatures other than "ay".
919
634
if prop._dbus_signature != "ay":
920
raise ValueError("Byte arrays not supported for non-"
921
"'ay' signature {!r}"
922
.format(prop._dbus_signature))
923
value = dbus.ByteArray(b''.join(chr(byte)
924
for byte in value))
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
925
638
prop(value)
926
639
927
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
929
642
def GetAll(self, interface_name):
930
643
"""Standard D-Bus property GetAll() method, see D-Bus
931
644
standard.
932
645
933
646
Note: Will not include properties with access="write".
934
647
"""
935
properties = {}
936
for name, prop in self._get_all_dbus_things("property"):
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
937
650
if (interface_name
938
651
and interface_name != prop._dbus_interface):
939
652
# Interface non-empty but did not match
943
656
continue
944
657
value = prop()
945
658
if not hasattr(value, "variant_level"):
946
properties[name] = value
659
all[name] = value
947
660
continue
948
properties[name] = type(value)(value, variant_level=
949
value.variant_level+1)
950
return dbus.Dictionary(properties, signature="sv")
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
951
664
952
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
953
666
out_signature="s",
954
667
path_keyword='object_path',
955
668
connection_keyword='connection')
956
669
def Introspect(self, object_path, connection):
957
"""Overloading of standard D-Bus method.
958
959
Inserts property tags and interface annotation tags.
670
"""Standard D-Bus method, overloaded to insert property tags.
960
671
"""
961
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
962
673
connection)
969
680
e.setAttribute("access", prop._dbus_access)
970
681
return e
971
682
for if_tag in document.getElementsByTagName("interface"):
972
# Add property tags
973
683
for tag in (make_tag(document, name, prop)
974
684
for name, prop
975
in self._get_all_dbus_things("property")
685
in self._get_all_dbus_properties()
976
686
if prop._dbus_interface
977
687
== if_tag.getAttribute("name")):
978
688
if_tag.appendChild(tag)
979
# Add annotation tags
980
for typ in ("method", "signal", "property"):
981
for tag in if_tag.getElementsByTagName(typ):
982
annots = dict()
983
for name, prop in (self.
984
_get_all_dbus_things(typ)):
985
if (name == tag.getAttribute("name")
986
and prop._dbus_interface
987
== if_tag.getAttribute("name")):
988
annots.update(getattr
989
(prop,
990
"_dbus_annotations",
991
{}))
992
for name, value in annots.items():
993
ann_tag = document.createElement(
994
"annotation")
995
ann_tag.setAttribute("name", name)
996
ann_tag.setAttribute("value", value)
997
tag.appendChild(ann_tag)
998
# Add interface annotation tags
999
for annotation, value in dict(
1000
itertools.chain.from_iterable(
1001
annotations().items()
1002
for name, annotations in
1003
self._get_all_dbus_things("interface")
1004
if name == if_tag.getAttribute("name")
1005
)).items():
1006
ann_tag = document.createElement("annotation")
1007
ann_tag.setAttribute("name", annotation)
1008
ann_tag.setAttribute("value", value)
1009
if_tag.appendChild(ann_tag)
1010
689
# Add the names to the return values for the
1011
690
# "org.freedesktop.DBus.Properties" methods
1012
691
if (if_tag.getAttribute("name")
1025
704
xmlstring = document.toxml("utf-8")
1026
705
document.unlink()
1027
706
except (AttributeError, xml.dom.DOMException,
1028
xml.parsers.expat.ExpatError) as error:
707
xml.parsers.expat.ExpatError), error:
1029
708
logger.error("Failed to override Introspection method",
1030
exc_info=error)
709
error)
1031
710
return xmlstring
1032
711
1033
712
1034
def datetime_to_dbus(dt, variant_level=0):
1035
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1036
if dt is None:
1037
return dbus.String("", variant_level = variant_level)
1038
return dbus.String(dt.isoformat(),
1039
variant_level=variant_level)
1040
1041
1042
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1043
"""A class decorator; applied to a subclass of
1044
dbus.service.Object, it will add alternate D-Bus attributes with
1045
interface names according to the "alt_interface_names" mapping.
1046
Usage:
1047
1048
@alternate_dbus_interfaces({"org.example.Interface":
1049
"net.example.AlternateInterface"})
1050
class SampleDBusObject(dbus.service.Object):
1051
@dbus.service.method("org.example.Interface")
1052
def SampleDBusMethod():
1053
pass
1054
1055
The above "SampleDBusMethod" on "SampleDBusObject" will be
1056
reachable via two interfaces: "org.example.Interface" and
1057
"net.example.AlternateInterface", the latter of which will have
1058
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1059
"true", unless "deprecate" is passed with a False value.
1060
1061
This works for methods and signals, and also for D-Bus properties
1062
(from DBusObjectWithProperties) and interfaces (from the
1063
dbus_interface_annotations decorator).
1064
"""
1065
def wrapper(cls):
1066
for orig_interface_name, alt_interface_name in (
1067
alt_interface_names.items()):
1068
attr = {}
1069
interface_names = set()
1070
# Go though all attributes of the class
1071
for attrname, attribute in inspect.getmembers(cls):
1072
# Ignore non-D-Bus attributes, and D-Bus attributes
1073
# with the wrong interface name
1074
if (not hasattr(attribute, "_dbus_interface")
1075
or not attribute._dbus_interface
1076
.startswith(orig_interface_name)):
1077
continue
1078
# Create an alternate D-Bus interface name based on
1079
# the current name
1080
alt_interface = (attribute._dbus_interface
1081
.replace(orig_interface_name,
1082
alt_interface_name))
1083
interface_names.add(alt_interface)
1084
# Is this a D-Bus signal?
1085
if getattr(attribute, "_dbus_is_signal", False):
1086
# Extract the original non-method undecorated
1087
# function by black magic
1088
nonmethod_func = (dict(
1089
zip(attribute.func_code.co_freevars,
1090
attribute.__closure__))["func"]
1091
.cell_contents)
1092
# Create a new, but exactly alike, function
1093
# object, and decorate it to be a new D-Bus signal
1094
# with the alternate D-Bus interface name
1095
new_function = (dbus.service.signal
1096
(alt_interface,
1097
attribute._dbus_signature)
1098
(types.FunctionType(
1099
nonmethod_func.func_code,
1100
nonmethod_func.func_globals,
1101
nonmethod_func.func_name,
1102
nonmethod_func.func_defaults,
1103
nonmethod_func.func_closure)))
1104
# Copy annotations, if any
1105
try:
1106
new_function._dbus_annotations = (
1107
dict(attribute._dbus_annotations))
1108
except AttributeError:
1109
pass
1110
# Define a creator of a function to call both the
1111
# original and alternate functions, so both the
1112
# original and alternate signals gets sent when
1113
# the function is called
1114
def fixscope(func1, func2):
1115
"""This function is a scope container to pass
1116
func1 and func2 to the "call_both" function
1117
outside of its arguments"""
1118
def call_both(*args, **kwargs):
1119
"""This function will emit two D-Bus
1120
signals by calling func1 and func2"""
1121
func1(*args, **kwargs)
1122
func2(*args, **kwargs)
1123
return call_both
1124
# Create the "call_both" function and add it to
1125
# the class
1126
attr[attrname] = fixscope(attribute, new_function)
1127
# Is this a D-Bus method?
1128
elif getattr(attribute, "_dbus_is_method", False):
1129
# Create a new, but exactly alike, function
1130
# object. Decorate it to be a new D-Bus method
1131
# with the alternate D-Bus interface name. Add it
1132
# to the class.
1133
attr[attrname] = (dbus.service.method
1134
(alt_interface,
1135
attribute._dbus_in_signature,
1136
attribute._dbus_out_signature)
1137
(types.FunctionType
1138
(attribute.func_code,
1139
attribute.func_globals,
1140
attribute.func_name,
1141
attribute.func_defaults,
1142
attribute.func_closure)))
1143
# Copy annotations, if any
1144
try:
1145
attr[attrname]._dbus_annotations = (
1146
dict(attribute._dbus_annotations))
1147
except AttributeError:
1148
pass
1149
# Is this a D-Bus property?
1150
elif getattr(attribute, "_dbus_is_property", False):
1151
# Create a new, but exactly alike, function
1152
# object, and decorate it to be a new D-Bus
1153
# property with the alternate D-Bus interface
1154
# name. Add it to the class.
1155
attr[attrname] = (dbus_service_property
1156
(alt_interface,
1157
attribute._dbus_signature,
1158
attribute._dbus_access,
1159
attribute
1160
._dbus_get_args_options
1161
["byte_arrays"])
1162
(types.FunctionType
1163
(attribute.func_code,
1164
attribute.func_globals,
1165
attribute.func_name,
1166
attribute.func_defaults,
1167
attribute.func_closure)))
1168
# Copy annotations, if any
1169
try:
1170
attr[attrname]._dbus_annotations = (
1171
dict(attribute._dbus_annotations))
1172
except AttributeError:
1173
pass
1174
# Is this a D-Bus interface?
1175
elif getattr(attribute, "_dbus_is_interface", False):
1176
# Create a new, but exactly alike, function
1177
# object. Decorate it to be a new D-Bus interface
1178
# with the alternate D-Bus interface name. Add it
1179
# to the class.
1180
attr[attrname] = (dbus_interface_annotations
1181
(alt_interface)
1182
(types.FunctionType
1183
(attribute.func_code,
1184
attribute.func_globals,
1185
attribute.func_name,
1186
attribute.func_defaults,
1187
attribute.func_closure)))
1188
if deprecate:
1189
# Deprecate all alternate interfaces
1190
iname="_AlternateDBusNames_interface_annotation{}"
1191
for interface_name in interface_names:
1192
@dbus_interface_annotations(interface_name)
1193
def func(self):
1194
return { "org.freedesktop.DBus.Deprecated":
1195
"true" }
1196
# Find an unused name
1197
for aname in (iname.format(i)
1198
for i in itertools.count()):
1199
if aname not in attr:
1200
attr[aname] = func
1201
break
1202
if interface_names:
1203
# Replace the class with a new subclass of it with
1204
# methods, signals, etc. as created above.
1205
cls = type(b"{}Alternate".format(cls.__name__),
1206
(cls,), attr)
1207
return cls
1208
return wrapper
1209
1210
1211
@alternate_dbus_interfaces({"se.recompile.Mandos":
1212
"se.bsnet.fukt.Mandos"})
1213
713
class ClientDBus(Client, DBusObjectWithProperties):
1214
714
"""A Client class using D-Bus
1215
715
1224
724
# dbus.service.Object doesn't use super(), so we can't either.
1225
725
1226
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1227
728
self.bus = bus
1228
729
Client.__init__(self, *args, **kwargs)
1229
730
# Only now, when this client is initialized, can it show up on
1235
736
("/clients/" + client_object_name))
1236
737
DBusObjectWithProperties.__init__(self, self.bus,
1237
738
self.dbus_object_path)
1238
1239
def notifychangeproperty(transform_func,
1240
dbus_name, type_func=lambda x: x,
1241
variant_level=1):
1242
""" Modify a variable so that it's a property which announces
1243
its changes to DBus.
1244
1245
transform_fun: Function that takes a value and a variant_level
1246
and transforms it to a D-Bus type.
1247
dbus_name: D-Bus name of the variable
1248
type_func: Function that transform the value before sending it
1249
to the D-Bus. Default: no transform
1250
variant_level: D-Bus variant level. Default: 1
1251
"""
1252
attrname = "_{}".format(dbus_name)
1253
def setter(self, value):
1254
if hasattr(self, "dbus_object_path"):
1255
if (not hasattr(self, attrname) or
1256
type_func(getattr(self, attrname, None))
1257
!= type_func(value)):
1258
dbus_value = transform_func(type_func(value),
1259
variant_level
1260
=variant_level)
1261
self.PropertyChanged(dbus.String(dbus_name),
1262
dbus_value)
1263
setattr(self, attrname, value)
1264
1265
return property(lambda self: getattr(self, attrname), setter)
1266
1267
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1268
approvals_pending = notifychangeproperty(dbus.Boolean,
1269
"ApprovalPending",
1270
type_func = bool)
1271
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1272
last_enabled = notifychangeproperty(datetime_to_dbus,
1273
"LastEnabled")
1274
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1275
type_func = lambda checker:
1276
checker is not None)
1277
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1278
"LastCheckedOK")
1279
last_checker_status = notifychangeproperty(dbus.Int16,
1280
"LastCheckerStatus")
1281
last_approval_request = notifychangeproperty(
1282
datetime_to_dbus, "LastApprovalRequest")
1283
approved_by_default = notifychangeproperty(dbus.Boolean,
1284
"ApprovedByDefault")
1285
approval_delay = notifychangeproperty(dbus.UInt64,
1286
"ApprovalDelay",
1287
type_func =
1288
lambda td: td.total_seconds()
1289
* 1000)
1290
approval_duration = notifychangeproperty(
1291
dbus.UInt64, "ApprovalDuration",
1292
type_func = lambda td: td.total_seconds() * 1000)
1293
host = notifychangeproperty(dbus.String, "Host")
1294
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1295
type_func = lambda td:
1296
td.total_seconds() * 1000)
1297
extended_timeout = notifychangeproperty(
1298
dbus.UInt64, "ExtendedTimeout",
1299
type_func = lambda td: td.total_seconds() * 1000)
1300
interval = notifychangeproperty(dbus.UInt64,
1301
"Interval",
1302
type_func =
1303
lambda td: td.total_seconds()
1304
* 1000)
1305
checker_command = notifychangeproperty(dbus.String, "Checker")
1306
1307
del notifychangeproperty
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
1308
783
1309
784
def __del__(self, *args, **kwargs):
1310
785
try:
1319
794
*args, **kwargs):
1320
795
self.checker_callback_tag = None
1321
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
1322
800
if os.WIFEXITED(condition):
1323
801
exitstatus = os.WEXITSTATUS(condition)
1324
802
# Emit D-Bus signal
1334
812
return Client.checker_callback(self, pid, condition, command,
1335
813
*args, **kwargs)
1336
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1337
833
def start_checker(self, *args, **kwargs):
1338
old_checker_pid = getattr(self.checker, "pid", None)
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
837
else:
838
old_checker_pid = None
1339
839
r = Client.start_checker(self, *args, **kwargs)
1340
840
# Only if new checker process was started
1341
841
if (self.checker is not None
1342
842
and old_checker_pid != self.checker.pid):
1343
843
# Emit D-Bus signal
1344
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
1345
848
return r
1346
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
return r
858
1347
859
def _reset_approved(self):
1348
self.approved = None
860
self._approved = None
1349
861
return False
1350
862
1351
863
def approve(self, value=True):
1352
self.approved = value
1353
gobject.timeout_add(int(self.approval_duration.total_seconds()
1354
* 1000), self._reset_approved)
1355
864
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
869
1356
870
1357
871
## D-Bus methods, signals & properties
1358
_interface = "se.recompile.Mandos.Client"
1359
1360
## Interfaces
1361
1362
@dbus_interface_annotations(_interface)
1363
def _foo(self):
1364
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1365
"false"}
872
_interface = "se.bsnet.fukt.Mandos.Client"
1366
873
1367
874
## Signals
1368
875
1415
922
# CheckedOK - method
1416
923
@dbus.service.method(_interface)
1417
924
def CheckedOK(self):
1418
self.checked_ok()
925
return self.checked_ok()
1419
926
1420
927
# Enable - method
1421
928
@dbus.service.method(_interface)
1454
961
if value is None: # get
1455
962
return dbus.Boolean(self.approved_by_default)
1456
963
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
1457
967
1458
968
# ApprovalDelay - property
1459
969
@dbus_service_property(_interface, signature="t",
1460
970
access="readwrite")
1461
971
def ApprovalDelay_dbus_property(self, value=None):
1462
972
if value is None: # get
1463
return dbus.UInt64(self.approval_delay.total_seconds()
1464
* 1000)
973
return dbus.UInt64(self.approval_delay_milliseconds())
1465
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
1466
978
1467
979
# ApprovalDuration - property
1468
980
@dbus_service_property(_interface, signature="t",
1469
981
access="readwrite")
1470
982
def ApprovalDuration_dbus_property(self, value=None):
1471
983
if value is None: # get
1472
return dbus.UInt64(self.approval_duration.total_seconds()
1473
* 1000)
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
1474
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
1475
990
1476
991
# Name - property
1477
992
@dbus_service_property(_interface, signature="s", access="read")
1489
1004
def Host_dbus_property(self, value=None):
1490
1005
if value is None: # get
1491
1006
return dbus.String(self.host)
1492
self.host = unicode(value)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1493
1011
1494
1012
# Created - property
1495
1013
@dbus_service_property(_interface, signature="s", access="read")
1496
1014
def Created_dbus_property(self):
1497
return datetime_to_dbus(self.created)
1015
return dbus.String(self._datetime_to_dbus(self.created))
1498
1016
1499
1017
# LastEnabled - property
1500
1018
@dbus_service_property(_interface, signature="s", access="read")
1501
1019
def LastEnabled_dbus_property(self):
1502
return datetime_to_dbus(self.last_enabled)
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1503
1023
1504
1024
# Enabled - property
1505
1025
@dbus_service_property(_interface, signature="b",
1519
1039
if value is not None:
1520
1040
self.checked_ok()
1521
1041
return
1522
return datetime_to_dbus(self.last_checked_ok)
1523
1524
# LastCheckerStatus - property
1525
@dbus_service_property(_interface, signature="n",
1526
access="read")
1527
def LastCheckerStatus_dbus_property(self):
1528
return dbus.Int16(self.last_checker_status)
1529
1530
# Expires - property
1531
@dbus_service_property(_interface, signature="s", access="read")
1532
def Expires_dbus_property(self):
1533
return datetime_to_dbus(self.expires)
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1534
1046
1535
1047
# LastApprovalRequest - property
1536
1048
@dbus_service_property(_interface, signature="s", access="read")
1537
1049
def LastApprovalRequest_dbus_property(self):
1538
return datetime_to_dbus(self.last_approval_request)
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1539
1055
1540
1056
# Timeout - property
1541
1057
@dbus_service_property(_interface, signature="t",
1542
1058
access="readwrite")
1543
1059
def Timeout_dbus_property(self, value=None):
1544
1060
if value is None: # get
1545
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1546
old_timeout = self.timeout
1061
return dbus.UInt64(self.timeout_milliseconds())
1547
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
1548
# Reschedule disabling
1549
if self.enabled:
1550
now = datetime.datetime.utcnow()
1551
self.expires += self.timeout - old_timeout
1552
if self.expires <= now:
1553
# The timeout has passed
1554
self.disable()
1555
else:
1556
if (getattr(self, "disable_initiator_tag", None)
1557
is None):
1558
return
1559
gobject.source_remove(self.disable_initiator_tag)
1560
self.disable_initiator_tag = (
1561
gobject.timeout_add(
1562
int((self.expires - now).total_seconds()
1563
* 1000), self.disable))
1564
1565
# ExtendedTimeout - property
1566
@dbus_service_property(_interface, signature="t",
1567
access="readwrite")
1568
def ExtendedTimeout_dbus_property(self, value=None):
1569
if value is None: # get
1570
return dbus.UInt64(self.extended_timeout.total_seconds()
1571
* 1000)
1572
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1573
1083
1574
1084
# Interval - property
1575
1085
@dbus_service_property(_interface, signature="t",
1576
1086
access="readwrite")
1577
1087
def Interval_dbus_property(self, value=None):
1578
1088
if value is None: # get
1579
return dbus.UInt64(self.interval.total_seconds() * 1000)
1089
return dbus.UInt64(self.interval_milliseconds())
1580
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1581
1094
if getattr(self, "checker_initiator_tag", None) is None:
1582
1095
return
1583
if self.enabled:
1584
# Reschedule checker run
1585
gobject.source_remove(self.checker_initiator_tag)
1586
self.checker_initiator_tag = (gobject.timeout_add
1587
(value, self.start_checker))
1588
self.start_checker() # Start one now, too
1589
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1101
1590
1102
# Checker - property
1591
1103
@dbus_service_property(_interface, signature="s",
1592
1104
access="readwrite")
1593
1105
def Checker_dbus_property(self, value=None):
1594
1106
if value is None: # get
1595
1107
return dbus.String(self.checker_command)
1596
self.checker_command = unicode(value)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1597
1113
1598
1114
# CheckerRunning - property
1599
1115
@dbus_service_property(_interface, signature="b",
1626
1142
self._pipe.send(('init', fpr, address))
1627
1143
if not self._pipe.recv():
1628
1144
raise KeyError()
1629
1145
1630
1146
def __getattribute__(self, name):
1631
if name == '_pipe':
1147
if(name == '_pipe'):
1632
1148
return super(ProxyClient, self).__getattribute__(name)
1633
1149
self._pipe.send(('getattr', name))
1634
1150
data = self._pipe.recv()
1639
1155
self._pipe.send(('funcall', name, args, kwargs))
1640
1156
return self._pipe.recv()[1]
1641
1157
return func
1642
1158
1643
1159
def __setattr__(self, name, value):
1644
if name == '_pipe':
1160
if(name == '_pipe'):
1645
1161
return super(ProxyClient, self).__setattr__(name, value)
1646
1162
self._pipe.send(('setattr', name, value))
1647
1163
1658
1174
unicode(self.client_address))
1659
1175
logger.debug("Pipe FD: %d",
1660
1176
self.server.child_pipe.fileno())
1661
1177
1662
1178
session = (gnutls.connection
1663
1179
.ClientSession(self.request,
1664
1180
gnutls.connection
1665
1181
.X509Credentials()))
1666
1182
1667
1183
# Note: gnutls.connection.X509Credentials is really a
1668
1184
# generic GnuTLS certificate credentials object so long as
1669
1185
# no X.509 keys are added to it. Therefore, we can use it
1670
1186
# here despite using OpenPGP certificates.
1671
1187
1672
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1673
1189
# "+AES-256-CBC", "+SHA1",
1674
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1680
1196
(gnutls.library.functions
1681
1197
.gnutls_priority_set_direct(session._c_object,
1682
1198
priority, None))
1683
1199
1684
1200
# Start communication using the Mandos protocol
1685
1201
# Get protocol number
1686
1202
line = self.request.makefile().readline()
1687
1203
logger.debug("Protocol version: %r", line)
1688
1204
try:
1689
1205
if int(line.strip().split()[0]) > 1:
1690
raise RuntimeError(line)
1691
except (ValueError, IndexError, RuntimeError) as error:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
1692
1208
logger.error("Unknown protocol version: %s", error)
1693
1209
return
1694
1210
1695
1211
# Start GnuTLS connection
1696
1212
try:
1697
1213
session.handshake()
1698
except gnutls.errors.GNUTLSError as error:
1214
except gnutls.errors.GNUTLSError, error:
1699
1215
logger.warning("Handshake failed: %s", error)
1700
1216
# Do not run session.bye() here: the session is not
1701
1217
# established. Just abandon the request.
1702
1218
return
1703
1219
logger.debug("Handshake succeeded")
1704
1220
1705
1221
approval_required = False
1706
1222
try:
1707
1223
try:
1708
1224
fpr = self.fingerprint(self.peer_certificate
1709
1225
(session))
1710
except (TypeError,
1711
gnutls.errors.GNUTLSError) as error:
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1712
1227
logger.warning("Bad certificate: %s", error)
1713
1228
return
1714
1229
logger.debug("Fingerprint: %s", fpr)
1715
1230
1716
1231
try:
1717
1232
client = ProxyClient(child_pipe, fpr,
1718
1233
self.client_address)
1726
1241
1727
1242
while True:
1728
1243
if not client.enabled:
1729
logger.info("Client %s is disabled",
1244
logger.warning("Client %s is disabled",
1730
1245
client.name)
1731
1246
if self.server.use_dbus:
1732
1247
# Emit D-Bus signal
1733
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
1734
1249
return
1735
1250
1736
if client.approved or not client.approval_delay:
1251
if client._approved or not client.approval_delay:
1737
1252
#We are approved or approval is disabled
1738
1253
break
1739
elif client.approved is None:
1254
elif client._approved is None:
1740
1255
logger.info("Client %s needs approval",
1741
1256
client.name)
1742
1257
if self.server.use_dbus:
1743
1258
# Emit D-Bus signal
1744
1259
client.NeedApproval(
1745
client.approval_delay.total_seconds()
1746
* 1000, client.approved_by_default)
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
1747
1262
else:
1748
1263
logger.warning("Client %s was not approved",
1749
1264
client.name)
1753
1268
return
1754
1269
1755
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1756
1272
time = datetime.datetime.now()
1757
1273
client.changedstate.acquire()
1758
client.changedstate.wait(delay.total_seconds())
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1759
1275
client.changedstate.release()
1760
1276
time2 = datetime.datetime.now()
1761
1277
if (time2 - time) >= delay:
1776
1292
while sent_size < len(client.secret):
1777
1293
try:
1778
1294
sent = session.send(client.secret[sent_size:])
1779
except gnutls.errors.GNUTLSError as error:
1780
logger.warning("gnutls send failed",
1781
exc_info=error)
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1782
1297
return
1783
1298
logger.debug("Sent: %d, remaining: %d",
1784
1299
sent, len(client.secret)
1785
1300
- (sent_size + sent))
1786
1301
sent_size += sent
1787
1302
1788
1303
logger.info("Sending secret to %s", client.name)
1789
# bump the timeout using extended_timeout
1790
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
1791
1306
if self.server.use_dbus:
1792
1307
# Emit D-Bus signal
1793
1308
client.GotSecret()
1797
1312
client.approvals_pending -= 1
1798
1313
try:
1799
1314
session.bye()
1800
except gnutls.errors.GNUTLSError as error:
1801
logger.warning("GnuTLS bye failed",
1802
exc_info=error)
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1803
1317
1804
1318
@staticmethod
1805
1319
def peer_certificate(session):
1861
1375
# Convert the buffer to a Python bytestring
1862
1376
fpr = ctypes.string_at(buf, buf_len.value)
1863
1377
# Convert the bytestring to hexadecimal notation
1864
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1865
1379
return hex_fpr
1866
1380
1867
1381
1870
1384
def sub_process_main(self, request, address):
1871
1385
try:
1872
1386
self.finish_request(request, address)
1873
except Exception:
1387
except:
1874
1388
self.handle_error(request, address)
1875
1389
self.close_request(request)
1876
1390
1877
1391
def process_request(self, request, address):
1878
1392
"""Start a new process to process the request."""
1879
proc = multiprocessing.Process(target = self.sub_process_main,
1880
args = (request, address))
1881
proc.start()
1882
return proc
1883
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1884
1395
1885
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1886
1397
""" adds a pipe to the MixIn """
1890
1401
This function creates a new pipe in self.pipe
1891
1402
"""
1892
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1893
1894
proc = MultiprocessingMixIn.process_request(self, request,
1895
client_address)
1404
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1896
1407
self.child_pipe.close()
1897
self.add_pipe(parent_pipe, proc)
1898
1899
def add_pipe(self, parent_pipe, proc):
1408
self.add_pipe(parent_pipe)
1409
1410
def add_pipe(self, parent_pipe):
1900
1411
"""Dummy function; override as necessary"""
1901
raise NotImplementedError()
1902
1412
raise NotImplementedError
1903
1413
1904
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1905
1415
socketserver.TCPServer, object):
1911
1421
use_ipv6: Boolean; to use IPv6 or not
1912
1422
"""
1913
1423
def __init__(self, server_address, RequestHandlerClass,
1914
interface=None, use_ipv6=True, socketfd=None):
1915
"""If socketfd is set, use that file descriptor instead of
1916
creating a new one with socket.socket().
1917
"""
1424
interface=None, use_ipv6=True):
1918
1425
self.interface = interface
1919
1426
if use_ipv6:
1920
1427
self.address_family = socket.AF_INET6
1921
if socketfd is not None:
1922
# Save the file descriptor
1923
self.socketfd = socketfd
1924
# Save the original socket.socket() function
1925
self.socket_socket = socket.socket
1926
# To implement --socket, we monkey patch socket.socket.
1927
#
1928
# (When socketserver.TCPServer is a new-style class, we
1929
# could make self.socket into a property instead of monkey
1930
# patching socket.socket.)
1931
#
1932
# Create a one-time-only replacement for socket.socket()
1933
@functools.wraps(socket.socket)
1934
def socket_wrapper(*args, **kwargs):
1935
# Restore original function so subsequent calls are
1936
# not affected.
1937
socket.socket = self.socket_socket
1938
del self.socket_socket
1939
# This time only, return a new socket object from the
1940
# saved file descriptor.
1941
return socket.fromfd(self.socketfd, *args, **kwargs)
1942
# Replace socket.socket() function with wrapper
1943
socket.socket = socket_wrapper
1944
# The socketserver.TCPServer.__init__ will call
1945
# socket.socket(), which might be our replacement,
1946
# socket_wrapper(), if socketfd was set.
1947
1428
socketserver.TCPServer.__init__(self, server_address,
1948
1429
RequestHandlerClass)
1949
1950
1430
def server_bind(self):
1951
1431
"""This overrides the normal server_bind() function
1952
1432
to bind to an interface if one was specified, and also NOT to
1960
1440
try:
1961
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1962
1442
SO_BINDTODEVICE,
1963
str(self.interface + '\0'))
1964
except socket.error as error:
1965
if error.errno == errno.EPERM:
1966
logger.error("No permission to bind to"
1967
" interface %s", self.interface)
1968
elif error.errno == errno.ENOPROTOOPT:
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1969
1451
logger.error("SO_BINDTODEVICE not available;"
1970
1452
" cannot bind to interface %s",
1971
1453
self.interface)
1972
elif error.errno == errno.ENODEV:
1973
logger.error("Interface %s does not exist,"
1974
" cannot bind", self.interface)
1975
1454
else:
1976
1455
raise
1977
1456
# Only bind(2) the socket if we really need to.
1980
1459
if self.address_family == socket.AF_INET6:
1981
1460
any_address = "::" # in6addr_any
1982
1461
else:
1983
any_address = "0.0.0.0" # INADDR_ANY
1462
any_address = socket.INADDR_ANY
1984
1463
self.server_address = (any_address,
1985
1464
self.server_address[1])
1986
1465
elif not self.server_address[1]:
2007
1486
"""
2008
1487
def __init__(self, server_address, RequestHandlerClass,
2009
1488
interface=None, use_ipv6=True, clients=None,
2010
gnutls_priority=None, use_dbus=True, socketfd=None):
1489
gnutls_priority=None, use_dbus=True):
2011
1490
self.enabled = False
2012
1491
self.clients = clients
2013
1492
if self.clients is None:
2014
self.clients = {}
1493
self.clients = set()
2015
1494
self.use_dbus = use_dbus
2016
1495
self.gnutls_priority = gnutls_priority
2017
1496
IPv6_TCPServer.__init__(self, server_address,
2018
1497
RequestHandlerClass,
2019
1498
interface = interface,
2020
use_ipv6 = use_ipv6,
2021
socketfd = socketfd)
1499
use_ipv6 = use_ipv6)
2022
1500
def server_activate(self):
2023
1501
if self.enabled:
2024
1502
return socketserver.TCPServer.server_activate(self)
2025
2026
1503
def enable(self):
2027
1504
self.enabled = True
2028
2029
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
2030
1506
# Call "handle_ipc" for both data and EOF events
2031
1507
gobject.io_add_watch(parent_pipe.fileno(),
2032
1508
gobject.IO_IN | gobject.IO_HUP,
2033
1509
functools.partial(self.handle_ipc,
2034
parent_pipe =
2035
parent_pipe,
2036
proc = proc))
2037
1510
parent_pipe = parent_pipe))
1511
2038
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2039
proc = None, client_object=None):
2040
# error, or the other end of multiprocessing.Pipe has closed
2041
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2042
# Wait for other process to exit
2043
proc.join()
1513
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2044
1530
return False
2045
1531
2046
1532
# Read a request from the child
2051
1537
fpr = request[1]
2052
1538
address = request[2]
2053
1539
2054
for c in self.clients.itervalues():
1540
for c in self.clients:
2055
1541
if c.fingerprint == fpr:
2056
1542
client = c
2057
1543
break
2058
1544
else:
2059
logger.info("Client not found for fingerprint: %s, ad"
2060
"dress: %s", fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2061
1547
if self.use_dbus:
2062
1548
# Emit D-Bus signal
2063
mandos_dbus_service.ClientNotFound(fpr,
2064
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2065
1550
parent_pipe.send(False)
2066
1551
return False
2067
1552
2068
1553
gobject.io_add_watch(parent_pipe.fileno(),
2069
1554
gobject.IO_IN | gobject.IO_HUP,
2070
1555
functools.partial(self.handle_ipc,
2071
parent_pipe =
2072
parent_pipe,
2073
proc = proc,
2074
client_object =
2075
client))
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2076
1558
parent_pipe.send(True)
2077
# remove the old hook in favor of the new above hook on
2078
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2079
1560
return False
2080
1561
if command == 'funcall':
2081
1562
funcname = request[1]
2082
1563
args = request[2]
2083
1564
kwargs = request[3]
2084
1565
2085
parent_pipe.send(('data', getattr(client_object,
2086
funcname)(*args,
2087
**kwargs)))
2088
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
2089
1568
if command == 'getattr':
2090
1569
attrname = request[1]
2091
1570
if callable(client_object.__getattribute__(attrname)):
2092
1571
parent_pipe.send(('function',))
2093
1572
else:
2094
parent_pipe.send(('data', client_object
2095
.__getattribute__(attrname)))
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2096
1574
2097
1575
if command == 'setattr':
2098
1576
attrname = request[1]
2099
1577
value = request[2]
2100
1578
setattr(client_object, attrname, value)
2101
1579
2102
1580
return True
2103
1581
2104
1582
2105
def rfc3339_duration_to_delta(duration):
2106
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2107
2108
>>> rfc3339_duration_to_delta("P7D")
2109
datetime.timedelta(7)
2110
>>> rfc3339_duration_to_delta("PT60S")
2111
datetime.timedelta(0, 60)
2112
>>> rfc3339_duration_to_delta("PT60M")
2113
datetime.timedelta(0, 3600)
2114
>>> rfc3339_duration_to_delta("PT24H")
2115
datetime.timedelta(1)
2116
>>> rfc3339_duration_to_delta("P1W")
2117
datetime.timedelta(7)
2118
>>> rfc3339_duration_to_delta("PT5M30S")
2119
datetime.timedelta(0, 330)
2120
>>> rfc3339_duration_to_delta("P1DT3M20S")
2121
datetime.timedelta(1, 200)
2122
"""
2123
2124
# Parsing an RFC 3339 duration with regular expressions is not
2125
# possible - there would have to be multiple places for the same
2126
# values, like seconds. The current code, while more esoteric, is
2127
# cleaner without depending on a parsing library. If Python had a
2128
# built-in library for parsing we would use it, but we'd like to
2129
# avoid excessive use of external libraries.
2130
2131
# New type for defining tokens, syntax, and semantics all-in-one
2132
Token = collections.namedtuple("Token",
2133
("regexp", # To match token; if
2134
# "value" is not None,
2135
# must have a "group"
2136
# containing digits
2137
"value", # datetime.timedelta or
2138
# None
2139
"followers")) # Tokens valid after
2140
# this token
2141
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2142
# the "duration" ABNF definition in RFC 3339, Appendix A.
2143
token_end = Token(re.compile(r"$"), None, frozenset())
2144
token_second = Token(re.compile(r"(\d+)S"),
2145
datetime.timedelta(seconds=1),
2146
frozenset((token_end,)))
2147
token_minute = Token(re.compile(r"(\d+)M"),
2148
datetime.timedelta(minutes=1),
2149
frozenset((token_second, token_end)))
2150
token_hour = Token(re.compile(r"(\d+)H"),
2151
datetime.timedelta(hours=1),
2152
frozenset((token_minute, token_end)))
2153
token_time = Token(re.compile(r"T"),
2154
None,
2155
frozenset((token_hour, token_minute,
2156
token_second)))
2157
token_day = Token(re.compile(r"(\d+)D"),
2158
datetime.timedelta(days=1),
2159
frozenset((token_time, token_end)))
2160
token_month = Token(re.compile(r"(\d+)M"),
2161
datetime.timedelta(weeks=4),
2162
frozenset((token_day, token_end)))
2163
token_year = Token(re.compile(r"(\d+)Y"),
2164
datetime.timedelta(weeks=52),
2165
frozenset((token_month, token_end)))
2166
token_week = Token(re.compile(r"(\d+)W"),
2167
datetime.timedelta(weeks=1),
2168
frozenset((token_end,)))
2169
token_duration = Token(re.compile(r"P"), None,
2170
frozenset((token_year, token_month,
2171
token_day, token_time,
2172
token_week)))
2173
# Define starting values
2174
value = datetime.timedelta() # Value so far
2175
found_token = None
2176
followers = frozenset((token_duration,)) # Following valid tokens
2177
s = duration # String left to parse
2178
# Loop until end token is found
2179
while found_token is not token_end:
2180
# Search for any currently valid tokens
2181
for token in followers:
2182
match = token.regexp.match(s)
2183
if match is not None:
2184
# Token found
2185
if token.value is not None:
2186
# Value found, parse digits
2187
factor = int(match.group(1), 10)
2188
# Add to value so far
2189
value += factor * token.value
2190
# Strip token from string
2191
s = token.regexp.sub("", s, 1)
2192
# Go to found token
2193
found_token = token
2194
# Set valid next tokens
2195
followers = found_token.followers
2196
break
2197
else:
2198
# No currently valid tokens were found
2199
raise ValueError("Invalid RFC 3339 duration")
2200
# End token found
2201
return value
2202
2203
2204
1583
def string_to_delta(interval):
2205
1584
"""Parse a string and return a datetime.timedelta
2206
1585
2217
1596
>>> string_to_delta('5m 30s')
2218
1597
datetime.timedelta(0, 330)
2219
1598
"""
2220
2221
try:
2222
return rfc3339_duration_to_delta(interval)
2223
except ValueError:
2224
pass
2225
2226
1599
timevalue = datetime.timedelta(0)
2227
1600
for s in interval.split():
2228
1601
try:
2239
1612
elif suffix == "w":
2240
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2241
1614
else:
2242
raise ValueError("Unknown suffix {!r}"
2243
.format(suffix))
2244
except IndexError as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2245
1617
raise ValueError(*(e.args))
2246
1618
timevalue += delta
2247
1619
return timevalue
2248
1620
2249
1621
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
2250
1646
def daemon(nochdir = False, noclose = False):
2251
1647
"""See daemon(3). Standard BSD Unix function.
2252
1648
2260
1656
sys.exit()
2261
1657
if not noclose:
2262
1658
# Close all standard open file descriptors
2263
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2264
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2265
raise OSError(errno.ENODEV, "{} not a character device"
2266
.format(os.devnull))
1661
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1663
% os.path.devnull)
2267
1664
os.dup2(null, sys.stdin.fileno())
2268
1665
os.dup2(null, sys.stdout.fileno())
2269
1666
os.dup2(null, sys.stderr.fileno())
2278
1675
2279
1676
parser = argparse.ArgumentParser()
2280
1677
parser.add_argument("-v", "--version", action="version",
2281
version = "%(prog)s {}".format(version),
1678
version = "%%(prog)s %s" % version,
2282
1679
help="show version number and exit")
2283
1680
parser.add_argument("-i", "--interface", metavar="IF",
2284
1681
help="Bind to interface IF")
2290
1687
help="Run self-test")
2291
1688
parser.add_argument("--debug", action="store_true",
2292
1689
help="Debug mode; run in foreground and log"
2293
" to terminal", default=None)
1690
" to terminal")
2294
1691
parser.add_argument("--debuglevel", metavar="LEVEL",
2295
1692
help="Debug level for stdout output")
2296
1693
parser.add_argument("--priority", help="GnuTLS"
2303
1700
" files")
2304
1701
parser.add_argument("--no-dbus", action="store_false",
2305
1702
dest="use_dbus", help="Do not provide D-Bus"
2306
" system bus interface", default=None)
1703
" system bus interface")
2307
1704
parser.add_argument("--no-ipv6", action="store_false",
2308
dest="use_ipv6", help="Do not use IPv6",
2309
default=None)
2310
parser.add_argument("--no-restore", action="store_false",
2311
dest="restore", help="Do not restore stored"
2312
" state", default=None)
2313
parser.add_argument("--socket", type=int,
2314
help="Specify a file descriptor to a network"
2315
" socket to use instead of creating one")
2316
parser.add_argument("--statedir", metavar="DIR",
2317
help="Directory to save/restore state in")
2318
parser.add_argument("--foreground", action="store_true",
2319
help="Run in foreground", default=None)
2320
parser.add_argument("--no-zeroconf", action="store_false",
2321
dest="zeroconf", help="Do not use Zeroconf",
2322
default=None)
2323
1705
dest="use_ipv6", help="Do not use IPv6")
2324
1706
options = parser.parse_args()
2325
1707
2326
1708
if options.check:
2327
1709
import doctest
2328
fail_count, test_count = doctest.testmod()
2329
sys.exit(os.EX_OK if fail_count == 0 else 1)
1710
doctest.testmod()
1711
sys.exit()
2330
1712
2331
1713
# Default values for config file for server-global settings
2332
1714
server_defaults = { "interface": "",
2334
1716
"port": "",
2335
1717
"debug": "False",
2336
1718
"priority":
2337
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1719
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2338
1720
"servicename": "Mandos",
2339
1721
"use_dbus": "True",
2340
1722
"use_ipv6": "True",
2341
1723
"debuglevel": "",
2342
"restore": "True",
2343
"socket": "",
2344
"statedir": "/var/lib/mandos",
2345
"foreground": "False",
2346
"zeroconf": "True",
2347
1724
}
2348
1725
2349
1726
# Parse config file for server-global settings
2354
1731
# Convert the SafeConfigParser object to a dict
2355
1732
server_settings = server_config.defaults()
2356
1733
# Use the appropriate methods on the non-string config options
2357
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1734
for option in ("debug", "use_dbus", "use_ipv6"):
2358
1735
server_settings[option] = server_config.getboolean("DEFAULT",
2359
1736
option)
2360
1737
if server_settings["port"]:
2361
1738
server_settings["port"] = server_config.getint("DEFAULT",
2362
1739
"port")
2363
if server_settings["socket"]:
2364
server_settings["socket"] = server_config.getint("DEFAULT",
2365
"socket")
2366
# Later, stdin will, and stdout and stderr might, be dup'ed
2367
# over with an opened os.devnull. But we don't want this to
2368
# happen with a supplied network socket.
2369
if 0 <= server_settings["socket"] <= 2:
2370
server_settings["socket"] = os.dup(server_settings
2371
["socket"])
2372
1740
del server_config
2373
1741
2374
1742
# Override the settings from the config file with command line
2375
1743
# options, if set.
2376
1744
for option in ("interface", "address", "port", "debug",
2377
1745
"priority", "servicename", "configdir",
2378
"use_dbus", "use_ipv6", "debuglevel", "restore",
2379
"statedir", "socket", "foreground", "zeroconf"):
1746
"use_dbus", "use_ipv6", "debuglevel"):
2380
1747
value = getattr(options, option)
2381
1748
if value is not None:
2382
1749
server_settings[option] = value
2385
1752
for option in server_settings.keys():
2386
1753
if type(server_settings[option]) is str:
2387
1754
server_settings[option] = unicode(server_settings[option])
2388
# Force all boolean options to be boolean
2389
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2390
"foreground", "zeroconf"):
2391
server_settings[option] = bool(server_settings[option])
2392
# Debug implies foreground
2393
if server_settings["debug"]:
2394
server_settings["foreground"] = True
2395
1755
# Now we have our good server settings in "server_settings"
2396
1756
2397
1757
##################################################################
2398
1758
2399
if (not server_settings["zeroconf"] and
2400
not (server_settings["port"]
2401
or server_settings["socket"] != "")):
2402
parser.error("Needs port or socket to work without"
2403
" Zeroconf")
2404
2405
1759
# For convenience
2406
1760
debug = server_settings["debug"]
2407
1761
debuglevel = server_settings["debuglevel"]
2408
1762
use_dbus = server_settings["use_dbus"]
2409
1763
use_ipv6 = server_settings["use_ipv6"]
2410
stored_state_path = os.path.join(server_settings["statedir"],
2411
stored_state_file)
2412
foreground = server_settings["foreground"]
2413
zeroconf = server_settings["zeroconf"]
2414
2415
if debug:
2416
initlogger(debug, logging.DEBUG)
2417
else:
2418
if not debuglevel:
2419
initlogger(debug)
2420
else:
2421
level = getattr(logging, debuglevel.upper())
2422
initlogger(debug, level)
2423
1764
2424
1765
if server_settings["servicename"] != "Mandos":
2425
1766
syslogger.setFormatter(logging.Formatter
2426
('Mandos ({}) [%(process)d]:'
2427
' %(levelname)s: %(message)s'
2428
.format(server_settings
2429
["servicename"])))
1767
('Mandos (%s) [%%(process)d]:'
1768
' %%(levelname)s: %%(message)s'
1769
% server_settings["servicename"]))
2430
1770
2431
1771
# Parse config file with clients
2432
client_config = configparser.SafeConfigParser(Client
2433
.client_defaults)
1772
client_defaults = { "timeout": "1h",
1773
"interval": "5m",
1774
"checker": "fping -q -- %%(host)s",
1775
"host": "",
1776
"approval_delay": "0s",
1777
"approval_duration": "1s",
1778
}
1779
client_config = configparser.SafeConfigParser(client_defaults)
2434
1780
client_config.read(os.path.join(server_settings["configdir"],
2435
1781
"clients.conf"))
2436
1782
2437
1783
global mandos_dbus_service
2438
1784
mandos_dbus_service = None
2439
1785
2440
socketfd = None
2441
if server_settings["socket"] != "":
2442
socketfd = server_settings["socket"]
2443
1786
tcp_server = MandosServer((server_settings["address"],
2444
1787
server_settings["port"]),
2445
1788
ClientHandler,
2448
1791
use_ipv6=use_ipv6,
2449
1792
gnutls_priority=
2450
1793
server_settings["priority"],
2451
use_dbus=use_dbus,
2452
socketfd=socketfd)
2453
if not foreground:
2454
pidfilename = "/run/mandos.pid"
2455
if not os.path.isdir("/run/."):
2456
pidfilename = "/var/run/mandos.pid"
2457
pidfile = None
1794
use_dbus=use_dbus)
1795
if not debug:
1796
pidfilename = "/var/run/mandos.pid"
2458
1797
try:
2459
1798
pidfile = open(pidfilename, "w")
2460
except IOError as e:
2461
logger.error("Could not open file %r", pidfilename,
2462
exc_info=e)
1799
except IOError:
1800
logger.error("Could not open file %r", pidfilename)
2463
1801
2464
for name in ("_mandos", "mandos", "nobody"):
1802
try:
1803
uid = pwd.getpwnam("_mandos").pw_uid
1804
gid = pwd.getpwnam("_mandos").pw_gid
1805
except KeyError:
2465
1806
try:
2466
uid = pwd.getpwnam(name).pw_uid
2467
gid = pwd.getpwnam(name).pw_gid
2468
break
1807
uid = pwd.getpwnam("mandos").pw_uid
1808
gid = pwd.getpwnam("mandos").pw_gid
2469
1809
except KeyError:
2470
continue
2471
else:
2472
uid = 65534
2473
gid = 65534
1810
try:
1811
uid = pwd.getpwnam("nobody").pw_uid
1812
gid = pwd.getpwnam("nobody").pw_gid
1813
except KeyError:
1814
uid = 65534
1815
gid = 65534
2474
1816
try:
2475
1817
os.setgid(gid)
2476
1818
os.setuid(uid)
2477
except OSError as error:
2478
if error.errno != errno.EPERM:
2479
raise
1819
except OSError, error:
1820
if error[0] != errno.EPERM:
1821
raise error
2480
1822
1823
if not debug and not debuglevel:
1824
syslogger.setLevel(logging.WARNING)
1825
console.setLevel(logging.WARNING)
1826
if debuglevel:
1827
level = getattr(logging, debuglevel.upper())
1828
syslogger.setLevel(level)
1829
console.setLevel(level)
1830
2481
1831
if debug:
2482
1832
# Enable all possible GnuTLS debugging
2483
1833
2493
1843
.gnutls_global_set_log_function(debug_gnutls))
2494
1844
2495
1845
# Redirect stdin so all checkers get /dev/null
2496
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1846
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2497
1847
os.dup2(null, sys.stdin.fileno())
2498
1848
if null > 2:
2499
1849
os.close(null)
1850
else:
1851
# No console logging
1852
logger.removeHandler(console)
2500
1853
2501
1854
# Need to fork before connecting to D-Bus
2502
if not foreground:
1855
if not debug:
2503
1856
# Close all input and output, do double fork, etc.
2504
1857
daemon()
2505
1858
2506
# multiprocessing will use threads, so before we use gobject we
2507
# need to inform gobject that threads will be used.
2508
gobject.threads_init()
2509
2510
1859
global main_loop
2511
1860
# From the Avahi example code
2512
DBusGMainLoop(set_as_default=True)
1861
DBusGMainLoop(set_as_default=True )
2513
1862
main_loop = gobject.MainLoop()
2514
1863
bus = dbus.SystemBus()
2515
1864
# End of Avahi example code
2516
1865
if use_dbus:
2517
1866
try:
2518
bus_name = dbus.service.BusName("se.recompile.Mandos",
1867
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2519
1868
bus, do_not_queue=True)
2520
old_bus_name = (dbus.service.BusName
2521
("se.bsnet.fukt.Mandos", bus,
2522
do_not_queue=True))
2523
except dbus.exceptions.NameExistsException as e:
2524
logger.error("Disabling D-Bus:", exc_info=e)
1869
except dbus.exceptions.NameExistsException, e:
1870
logger.error(unicode(e) + ", disabling D-Bus")
2525
1871
use_dbus = False
2526
1872
server_settings["use_dbus"] = False
2527
1873
tcp_server.use_dbus = False
2528
if zeroconf:
2529
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2530
service = AvahiServiceToSyslog(name =
2531
server_settings["servicename"],
2532
servicetype = "_mandos._tcp",
2533
protocol = protocol, bus = bus)
2534
if server_settings["interface"]:
2535
service.interface = (if_nametoindex
2536
(str(server_settings["interface"])))
1874
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1875
service = AvahiService(name = server_settings["servicename"],
1876
servicetype = "_mandos._tcp",
1877
protocol = protocol, bus = bus)
1878
if server_settings["interface"]:
1879
service.interface = (if_nametoindex
1880
(str(server_settings["interface"])))
2537
1881
2538
1882
global multiprocessing_manager
2539
1883
multiprocessing_manager = multiprocessing.Manager()
2541
1885
client_class = Client
2542
1886
if use_dbus:
2543
1887
client_class = functools.partial(ClientDBus, bus = bus)
2544
2545
client_settings = Client.config_parser(client_config)
2546
old_client_settings = {}
2547
clients_data = {}
2548
2549
# This is used to redirect stdout and stderr for checker processes
2550
global wnull
2551
wnull = open(os.devnull, "w") # A writable /dev/null
2552
# Only used if server is running in foreground but not in debug
2553
# mode
2554
if debug or not foreground:
2555
wnull.close()
2556
2557
# Get client data and settings from last running state.
2558
if server_settings["restore"]:
2559
try:
2560
with open(stored_state_path, "rb") as stored_state:
2561
clients_data, old_client_settings = (pickle.load
2562
(stored_state))
2563
os.remove(stored_state_path)
2564
except IOError as e:
2565
if e.errno == errno.ENOENT:
2566
logger.warning("Could not load persistent state: {}"
2567
.format(os.strerror(e.errno)))
2568
else:
2569
logger.critical("Could not load persistent state:",
2570
exc_info=e)
2571
raise
2572
except EOFError as e:
2573
logger.warning("Could not load persistent state: "
2574
"EOFError:", exc_info=e)
2575
2576
with PGPEngine() as pgp:
2577
for client_name, client in clients_data.items():
2578
# Skip removed clients
2579
if client_name not in client_settings:
2580
continue
2581
2582
# Decide which value to use after restoring saved state.
2583
# We have three different values: Old config file,
2584
# new config file, and saved state.
2585
# New config value takes precedence if it differs from old
2586
# config value, otherwise use saved state.
2587
for name, value in client_settings[client_name].items():
2588
try:
2589
# For each value in new config, check if it
2590
# differs from the old config value (Except for
2591
# the "secret" attribute)
2592
if (name != "secret" and
2593
value != old_client_settings[client_name]
2594
[name]):
2595
client[name] = value
2596
except KeyError:
2597
pass
2598
2599
# Clients who has passed its expire date can still be
2600
# enabled if its last checker was successful. Clients
2601
# whose checker succeeded before we stored its state is
2602
# assumed to have successfully run all checkers during
2603
# downtime.
2604
if client["enabled"]:
2605
if datetime.datetime.utcnow() >= client["expires"]:
2606
if not client["last_checked_ok"]:
2607
logger.warning(
2608
"disabling client {} - Client never "
2609
"performed a successful checker"
2610
.format(client_name))
2611
client["enabled"] = False
2612
elif client["last_checker_status"] != 0:
2613
logger.warning(
2614
"disabling client {} - Client last"
2615
" checker failed with error code {}"
2616
.format(client_name,
2617
client["last_checker_status"]))
2618
client["enabled"] = False
2619
else:
2620
client["expires"] = (datetime.datetime
2621
.utcnow()
2622
+ client["timeout"])
2623
logger.debug("Last checker succeeded,"
2624
" keeping {} enabled"
2625
.format(client_name))
1888
def client_config_items(config, section):
1889
special_settings = {
1890
"approved_by_default":
1891
lambda: config.getboolean(section,
1892
"approved_by_default"),
1893
}
1894
for name, value in config.items(section):
2626
1895
try:
2627
client["secret"] = (
2628
pgp.decrypt(client["encrypted_secret"],
2629
client_settings[client_name]
2630
["secret"]))
2631
except PGPError:
2632
# If decryption fails, we use secret from new settings
2633
logger.debug("Failed to decrypt {} old secret"
2634
.format(client_name))
2635
client["secret"] = (
2636
client_settings[client_name]["secret"])
2637
2638
# Add/remove clients based on new changes made to config
2639
for client_name in (set(old_client_settings)
2640
- set(client_settings)):
2641
del clients_data[client_name]
2642
for client_name in (set(client_settings)
2643
- set(old_client_settings)):
2644
clients_data[client_name] = client_settings[client_name]
2645
2646
# Create all client objects
2647
for client_name, client in clients_data.items():
2648
tcp_server.clients[client_name] = client_class(
2649
name = client_name, settings = client,
2650
server_settings = server_settings)
2651
1896
yield (name, special_settings[name]())
1897
except KeyError:
1898
yield (name, value)
1899
1900
tcp_server.clients.update(set(
1901
client_class(name = section,
1902
config= dict(client_config_items(
1903
client_config, section)))
1904
for section in client_config.sections()))
2652
1905
if not tcp_server.clients:
2653
1906
logger.warning("No clients defined")
2654
2655
if not foreground:
2656
if pidfile is not None:
2657
try:
2658
with pidfile:
2659
pid = os.getpid()
2660
pidfile.write(str(pid) + "\n".encode("utf-8"))
2661
except IOError:
2662
logger.error("Could not write to file %r with PID %d",
2663
pidfilename, pid)
2664
del pidfile
1907
1908
if not debug:
1909
try:
1910
with pidfile:
1911
pid = os.getpid()
1912
pidfile.write(str(pid) + "\n".encode("utf-8"))
1913
del pidfile
1914
except IOError:
1915
logger.error("Could not write to file %r with PID %d",
1916
pidfilename, pid)
1917
except NameError:
1918
# "pidfile" was never created
1919
pass
2665
1920
del pidfilename
2666
1921
1922
signal.signal(signal.SIGINT, signal.SIG_IGN)
1923
2667
1924
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2668
1925
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2669
1926
2670
1927
if use_dbus:
2671
@alternate_dbus_interfaces({"se.recompile.Mandos":
2672
"se.bsnet.fukt.Mandos"})
2673
class MandosDBusService(DBusObjectWithProperties):
1928
class MandosDBusService(dbus.service.Object):
2674
1929
"""A D-Bus proxy object"""
2675
1930
def __init__(self):
2676
1931
dbus.service.Object.__init__(self, bus, "/")
2677
_interface = "se.recompile.Mandos"
2678
2679
@dbus_interface_annotations(_interface)
2680
def _foo(self):
2681
return { "org.freedesktop.DBus.Property"
2682
".EmitsChangedSignal":
2683
"false"}
1932
_interface = "se.bsnet.fukt.Mandos"
2684
1933
2685
1934
@dbus.service.signal(_interface, signature="o")
2686
1935
def ClientAdded(self, objpath):
2701
1950
def GetAllClients(self):
2702
1951
"D-Bus method"
2703
1952
return dbus.Array(c.dbus_object_path
2704
for c in
2705
tcp_server.clients.itervalues())
1953
for c in tcp_server.clients)
2706
1954
2707
1955
@dbus.service.method(_interface,
2708
1956
out_signature="a{oa{sv}}")
2710
1958
"D-Bus method"
2711
1959
return dbus.Dictionary(
2712
1960
((c.dbus_object_path, c.GetAll(""))
2713
for c in tcp_server.clients.itervalues()),
1961
for c in tcp_server.clients),
2714
1962
signature="oa{sv}")
2715
1963
2716
1964
@dbus.service.method(_interface, in_signature="o")
2717
1965
def RemoveClient(self, object_path):
2718
1966
"D-Bus method"
2719
for c in tcp_server.clients.itervalues():
1967
for c in tcp_server.clients:
2720
1968
if c.dbus_object_path == object_path:
2721
del tcp_server.clients[c.name]
1969
tcp_server.clients.remove(c)
2722
1970
c.remove_from_connection()
2723
1971
# Don't signal anything except ClientRemoved
2724
1972
c.disable(quiet=True)
2733
1981
2734
1982
def cleanup():
2735
1983
"Cleanup function; run on exit"
2736
if zeroconf:
2737
service.cleanup()
2738
2739
multiprocessing.active_children()
2740
wnull.close()
2741
if not (tcp_server.clients or client_settings):
2742
return
2743
2744
# Store client before exiting. Secrets are encrypted with key
2745
# based on what config file has. If config file is
2746
# removed/edited, old secret will thus be unrecovable.
2747
clients = {}
2748
with PGPEngine() as pgp:
2749
for client in tcp_server.clients.itervalues():
2750
key = client_settings[client.name]["secret"]
2751
client.encrypted_secret = pgp.encrypt(client.secret,
2752
key)
2753
client_dict = {}
2754
2755
# A list of attributes that can not be pickled
2756
# + secret.
2757
exclude = { "bus", "changedstate", "secret",
2758
"checker", "server_settings" }
2759
for name, typ in (inspect.getmembers
2760
(dbus.service.Object)):
2761
exclude.add(name)
2762
2763
client_dict["encrypted_secret"] = (client
2764
.encrypted_secret)
2765
for attr in client.client_structure:
2766
if attr not in exclude:
2767
client_dict[attr] = getattr(client, attr)
2768
2769
clients[client.name] = client_dict
2770
del client_settings[client.name]["secret"]
2771
2772
try:
2773
with (tempfile.NamedTemporaryFile
2774
(mode='wb', suffix=".pickle", prefix='clients-',
2775
dir=os.path.dirname(stored_state_path),
2776
delete=False)) as stored_state:
2777
pickle.dump((clients, client_settings), stored_state)
2778
tempname=stored_state.name
2779
os.rename(tempname, stored_state_path)
2780
except (IOError, OSError) as e:
2781
if not debug:
2782
try:
2783
os.remove(tempname)
2784
except NameError:
2785
pass
2786
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2787
logger.warning("Could not save persistent state: {}"
2788
.format(os.strerror(e.errno)))
2789
else:
2790
logger.warning("Could not save persistent state:",
2791
exc_info=e)
2792
raise
2793
2794
# Delete all clients, and settings from config
1984
service.cleanup()
1985
2795
1986
while tcp_server.clients:
2796
name, client = tcp_server.clients.popitem()
1987
client = tcp_server.clients.pop()
2797
1988
if use_dbus:
2798
1989
client.remove_from_connection()
1990
client.disable_hook = None
2799
1991
# Don't signal anything except ClientRemoved
2800
1992
client.disable(quiet=True)
2801
1993
if use_dbus:
2802
1994
# Emit D-Bus signal
2803
mandos_dbus_service.ClientRemoved(client
2804
.dbus_object_path,
1995
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2805
1996
client.name)
2806
client_settings.clear()
2807
1997
2808
1998
atexit.register(cleanup)
2809
1999
2810
for client in tcp_server.clients.itervalues():
2000
for client in tcp_server.clients:
2811
2001
if use_dbus:
2812
2002
# Emit D-Bus signal
2813
2003
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2814
# Need to initiate checking of clients
2815
if client.enabled:
2816
client.init_checker()
2004
client.enable()
2817
2005
2818
2006
tcp_server.enable()
2819
2007
tcp_server.server_activate()
2820
2008
2821
2009
# Find out what port we got
2822
if zeroconf:
2823
service.port = tcp_server.socket.getsockname()[1]
2010
service.port = tcp_server.socket.getsockname()[1]
2824
2011
if use_ipv6:
2825
2012
logger.info("Now listening on address %r, port %d,"
2826
" flowinfo %d, scope_id %d",
2827
*tcp_server.socket.getsockname())
2013
" flowinfo %d, scope_id %d"
2014
% tcp_server.socket.getsockname())
2828
2015
else: # IPv4
2829
logger.info("Now listening on address %r, port %d",
2830
*tcp_server.socket.getsockname())
2016
logger.info("Now listening on address %r, port %d"
2017
% tcp_server.socket.getsockname())
2831
2018
2832
2019
#service.interface = tcp_server.socket.getsockname()[3]
2833
2020
2834
2021
try:
2835
if zeroconf:
2836
# From the Avahi example code
2837
try:
2838
service.activate()
2839
except dbus.exceptions.DBusException as error:
2840
logger.critical("D-Bus Exception", exc_info=error)
2841
cleanup()
2842
sys.exit(1)
2843
# End of Avahi example code
2022
# From the Avahi example code
2023
try:
2024
service.activate()
2025
except dbus.exceptions.DBusException, error:
2026
logger.critical("DBusException: %s", error)
2027
cleanup()
2028
sys.exit(1)
2029
# End of Avahi example code
2844
2030
2845
2031
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2846
2032
lambda *args, **kwargs:
2849
2035
2850
2036
logger.debug("Starting main loop")
2851
2037
main_loop.run()
2852
except AvahiError as error:
2853
logger.critical("Avahi Error", exc_info=error)
2038
except AvahiError, error:
2039
logger.critical("AvahiError: %s", error)
2854
2040
cleanup()
2855
2041
sys.exit(1)
2856
2042
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0