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- Committer: Teddy Hogeborn
- Date: 2008-09-05 07:15:46 UTC
- Revision ID: teddy@fukt.bsnet.se-20080905071546-ax00hzgq40xzprn0
* Makefile (purge-client): Also remove "plugin-runner.conf".
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
33
from __future__ import division
36
34
37
import SocketServer as socketserver
35
import SocketServer
38
36
import socket
39
import argparse
37
import select
38
from optparse import OptionParser
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
import ConfigParser as configparser
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
58
67
59
import dbus
68
import dbus.service
69
60
import gobject
70
61
import avahi
71
62
from dbus.mainloop.glib import DBusGMainLoop
72
63
import ctypes
73
import ctypes.util
74
import xml.dom.minidom
75
import inspect
76
77
try:
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
except AttributeError:
80
try:
81
from IN import SO_BINDTODEVICE
82
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.3.1"
87
88
#logger = logging.getLogger('mandos')
64
65
version = "1.0"
66
89
67
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
68
syslogger = logging.handlers.SysLogHandler\
69
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
70
address = "/dev/log")
71
syslogger.setFormatter(logging.Formatter\
72
('Mandos: %(levelname)s: %(message)s'))
96
73
logger.addHandler(syslogger)
97
74
98
75
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
101
77
' %(message)s'))
102
78
logger.addHandler(console)
103
79
104
80
class AvahiError(Exception):
105
def __init__(self, value, *args, **kwargs):
81
def __init__(self, value):
106
82
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
83
def __str__(self):
84
return repr(self.value)
110
85
111
86
class AvahiServiceError(AvahiError):
112
87
pass
117
92
118
93
class AvahiService(object):
119
94
"""An Avahi (Zeroconf) service.
120
121
95
Attributes:
122
96
interface: integer; avahi.IF_UNSPEC or an interface index.
123
97
Used to optionally bind to the specified interface.
131
105
max_renames: integer; maximum number of renames
132
106
rename_count: integer; counter so we only rename after collisions
133
107
a sensible number of times
134
group: D-Bus Entry Group
135
server: D-Bus Server
136
bus: dbus.SystemBus()
137
108
"""
138
109
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
142
112
self.interface = interface
143
113
self.name = name
144
self.type = servicetype
114
self.type = type
145
115
self.port = port
146
self.TXT = TXT if TXT is not None else []
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
147
120
self.domain = domain
148
121
self.host = host
149
122
self.rename_count = 0
150
123
self.max_renames = max_renames
151
self.protocol = protocol
152
self.group = None # our entry group
153
self.server = None
154
self.bus = bus
155
self.entry_group_state_changed_match = None
156
124
def rename(self):
157
125
"""Derived from the Avahi example code"""
158
126
if self.rename_count >= self.max_renames:
159
logger.critical("No suitable Zeroconf service name found"
160
" after %i retries, exiting.",
161
self.rename_count)
127
logger.critical(u"No suitable Zeroconf service name found"
128
u" after %i retries, exiting.",
129
rename_count)
162
130
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
164
logger.info("Changing Zeroconf service name to %r ...",
165
self.name)
166
syslogger.setFormatter(logging.Formatter
167
('Mandos (%s) [%%(process)d]:'
168
' %%(levelname)s: %%(message)s'
169
% self.name))
131
self.name = server.GetAlternativeServiceName(self.name)
132
logger.info(u"Changing Zeroconf service name to %r ...",
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(message)s' % self.name))
170
137
self.remove()
171
try:
172
self.add()
173
except dbus.exceptions.DBusException as error:
174
logger.critical("DBusException: %s", error)
175
self.cleanup()
176
os._exit(1)
138
self.add()
177
139
self.rename_count += 1
178
140
def remove(self):
179
141
"""Derived from the Avahi example code"""
180
if self.entry_group_state_changed_match is not None:
181
self.entry_group_state_changed_match.remove()
182
self.entry_group_state_changed_match = None
183
if self.group is not None:
184
self.group.Reset()
142
if group is not None:
143
group.Reset()
185
144
def add(self):
186
145
"""Derived from the Avahi example code"""
187
self.remove()
188
if self.group is None:
189
self.group = dbus.Interface(
190
self.bus.get_object(avahi.DBUS_NAME,
191
self.server.EntryGroupNew()),
192
avahi.DBUS_INTERFACE_ENTRY_GROUP)
193
self.entry_group_state_changed_match = (
194
self.group.connect_to_signal(
195
'StateChanged', self .entry_group_state_changed))
196
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
197
self.name, self.type)
198
self.group.AddService(
199
self.interface,
200
self.protocol,
201
dbus.UInt32(0), # flags
202
self.name, self.type,
203
self.domain, self.host,
204
dbus.UInt16(self.port),
205
avahi.string_array_to_txt_array(self.TXT))
206
self.group.Commit()
207
def entry_group_state_changed(self, state, error):
208
"""Derived from the Avahi example code"""
209
logger.debug("Avahi entry group state change: %i", state)
210
211
if state == avahi.ENTRY_GROUP_ESTABLISHED:
212
logger.debug("Zeroconf service established.")
213
elif state == avahi.ENTRY_GROUP_COLLISION:
214
logger.info("Zeroconf service name collision.")
215
self.rename()
216
elif state == avahi.ENTRY_GROUP_FAILURE:
217
logger.critical("Avahi: Error in group state changed %s",
218
unicode(error))
219
raise AvahiGroupError("State changed: %s"
220
% unicode(error))
221
def cleanup(self):
222
"""Derived from the Avahi example code"""
223
if self.group is not None:
224
try:
225
self.group.Free()
226
except (dbus.exceptions.UnknownMethodException,
227
dbus.exceptions.DBusException) as e:
228
pass
229
self.group = None
230
self.remove()
231
def server_state_changed(self, state, error=None):
232
"""Derived from the Avahi example code"""
233
logger.debug("Avahi server state change: %i", state)
234
bad_states = { avahi.SERVER_INVALID:
235
"Zeroconf server invalid",
236
avahi.SERVER_REGISTERING: None,
237
avahi.SERVER_COLLISION:
238
"Zeroconf server name collision",
239
avahi.SERVER_FAILURE:
240
"Zeroconf server failure" }
241
if state in bad_states:
242
if bad_states[state] is not None:
243
if error is None:
244
logger.error(bad_states[state])
245
else:
246
logger.error(bad_states[state] + ": %r", error)
247
self.cleanup()
248
elif state == avahi.SERVER_RUNNING:
249
self.add()
250
else:
251
if error is None:
252
logger.debug("Unknown state: %r", state)
253
else:
254
logger.debug("Unknown state: %r: %r", state, error)
255
def activate(self):
256
"""Derived from the Avahi example code"""
257
if self.server is None:
258
self.server = dbus.Interface(
259
self.bus.get_object(avahi.DBUS_NAME,
260
avahi.DBUS_PATH_SERVER,
261
follow_name_owner_changes=True),
262
avahi.DBUS_INTERFACE_SERVER)
263
self.server.connect_to_signal("StateChanged",
264
self.server_state_changed)
265
self.server_state_changed(self.server.GetState())
266
267
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
273
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
169
170
274
171
class Client(object):
275
172
"""A representation of a client host served by this server.
276
277
173
Attributes:
278
_approved: bool(); 'None' if not yet approved/disapproved
279
approval_delay: datetime.timedelta(); Time to wait for approval
280
approval_duration: datetime.timedelta(); Duration of one approval
281
checker: subprocess.Popen(); a running checker process used
282
to see if the client lives.
283
'None' if no process is running.
284
checker_callback_tag: a gobject event source tag, or None
285
checker_command: string; External command which is run to check
286
if client lives. %() expansions are done at
174
name: string; from the config file, used in log messages
175
fingerprint: string (40 or 32 hexadecimal digits); used to
176
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
host: string; available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
190
checker_callback_tag: - '' -
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
287
193
runtime with vars(self) as dict, so that for
288
194
instance %(name)s can be used in the command.
289
checker_initiator_tag: a gobject event source tag, or None
290
created: datetime.datetime(); (UTC) object creation
291
current_checker_command: string; current running checker_command
292
disable_hook: If set, called by disable() as disable_hook(self)
293
disable_initiator_tag: a gobject event source tag, or None
294
enabled: bool()
295
fingerprint: string (40 or 32 hexadecimal digits); used to
296
uniquely identify the client
297
host: string; available for use by the checker command
298
interval: datetime.timedelta(); How often to start a new checker
299
last_approval_request: datetime.datetime(); (UTC) or None
300
last_checked_ok: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
302
name: string; from the config file, used in log messages and
303
D-Bus identifiers
304
secret: bytestring; sent verbatim (over TLS) to client
305
timeout: datetime.timedelta(); How long from last_checked_ok
306
until this client is disabled
307
extended_timeout: extra long timeout when password has been sent
308
runtime_expansions: Allowed attributes for runtime expansion.
309
expires: datetime.datetime(); time (UTC) when a client will be
310
disabled, or None
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
311
200
"""
312
313
runtime_expansions = ("approval_delay", "approval_duration",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
316
"last_enabled", "name", "timeout")
317
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return _timedelta_to_milliseconds(self.timeout)
321
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return _timedelta_to_milliseconds(self.extended_timeout)
325
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.interval)
329
330
def approval_delay_milliseconds(self):
331
return _timedelta_to_milliseconds(self.approval_delay)
332
333
def __init__(self, name = None, disable_hook=None, config=None):
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name = None, stop_hook=None, config={}):
334
225
"""Note: the 'checker' key in 'config' sets the
335
226
'checker_command' attribute and *not* the 'checker'
336
227
attribute."""
337
228
self.name = name
338
if config is None:
339
config = {}
340
logger.debug("Creating client %r", self.name)
229
logger.debug(u"Creating client %r", self.name)
341
230
# Uppercase and remove spaces from fingerprint for later
342
231
# comparison purposes with return value from the fingerprint()
343
232
# function
344
self.fingerprint = (config["fingerprint"].upper()
345
.replace(" ", ""))
346
logger.debug(" Fingerprint: %s", self.fingerprint)
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
347
236
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
237
self.secret = config["secret"].decode(u"base64")
349
238
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
352
"rb") as secfile:
353
self.secret = secfile.read()
239
sf = open(config["secfile"])
240
self.secret = sf.read()
241
sf.close()
354
242
else:
355
raise TypeError("No secret or secfile for client %s"
243
raise TypeError(u"No secret or secfile for client %s"
356
244
% self.name)
357
245
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
359
self.enabled = False
360
self.last_approval_request = None
361
self.last_enabled = None
246
self.created = datetime.datetime.now()
362
247
self.last_checked_ok = None
363
248
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
249
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
250
self.stop_hook = stop_hook
367
251
self.checker = None
368
252
self.checker_initiator_tag = None
369
self.disable_initiator_tag = None
370
self.expires = None
253
self.stop_initiator_tag = None
371
254
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
373
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
377
True)
378
self.approvals_pending = 0
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
384
385
def send_changedstate(self):
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
389
390
def enable(self):
255
self.check_command = config["checker"]
256
def start(self):
391
257
"""Start this client's checker and timeout hooks"""
392
if getattr(self, "enabled", False):
393
# Already enabled
394
return
395
self.send_changedstate()
396
258
# Schedule a new checker to be started an 'interval' from now,
397
259
# and every interval from then on.
398
self.checker_initiator_tag = (gobject.timeout_add
399
(self.interval_milliseconds(),
400
self.start_checker))
401
# Schedule a disable() when 'timeout' has passed
402
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
405
self.disable))
406
self.enabled = True
407
self.last_enabled = datetime.datetime.utcnow()
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
408
263
# Also start a new checker *right now*.
409
264
self.start_checker()
410
411
def disable(self, quiet=True):
412
"""Disable this client."""
413
if not getattr(self, "enabled", False):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if hasattr(self, "secret") and self.secret:
275
logger.info(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
414
278
return False
415
if not quiet:
416
self.send_changedstate()
417
if not quiet:
418
logger.info("Disabling client %s", self.name)
419
if getattr(self, "disable_initiator_tag", False):
420
gobject.source_remove(self.disable_initiator_tag)
421
self.disable_initiator_tag = None
422
self.expires = None
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
423
282
if getattr(self, "checker_initiator_tag", False):
424
283
gobject.source_remove(self.checker_initiator_tag)
425
284
self.checker_initiator_tag = None
426
285
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
429
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
430
288
# Do not run this again if called by a gobject.timeout_add
431
289
return False
432
433
290
def __del__(self):
434
self.disable_hook = None
435
self.disable()
436
437
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
438
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
439
296
self.checker_callback_tag = None
440
297
self.checker = None
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
443
if exitstatus == 0:
444
logger.info("Checker for %(name)s succeeded",
445
vars(self))
446
self.checked_ok()
447
else:
448
logger.info("Checker for %(name)s failed",
449
vars(self))
450
else:
451
logger.warning("Checker for %(name)s crashed?",
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.info(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
308
logger.warning(u"Checker for %(name)s crashed?",
452
309
vars(self))
453
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
456
457
This should only be called when the client has been seen,
458
alive and well.
459
"""
460
if timeout is None:
461
timeout = self.timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(_timedelta_to_milliseconds(timeout),
467
self.disable))
468
469
def need_approval(self):
470
self.last_approval_request = datetime.datetime.utcnow()
471
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
472
313
def start_checker(self):
473
314
"""Start a new checker subprocess if one is not running.
474
475
315
If a checker already exists, leave it running and do
476
316
nothing."""
477
317
# The reason for not killing a running checker is that if we
480
320
# client would inevitably timeout, since no checker would get
481
321
# a chance to run to completion. If we instead leave running
482
322
# checkers alone, the checker would have to take more time
483
# than 'timeout' for the client to be disabled, which is as it
484
# should be.
485
486
# If a checker exists, make sure it is not a zombie
487
try:
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
492
raise error
493
else:
494
if pid:
495
logger.warning("Checker was a zombie")
496
gobject.source_remove(self.checker_callback_tag)
497
self.checker_callback(pid, status,
498
self.current_checker_command)
499
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
500
325
if self.checker is None:
501
326
try:
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
504
329
except TypeError:
505
330
# Escape attributes for the shell
506
escaped_attrs = dict(
507
(attr,
508
re.escape(unicode(str(getattr(self, attr, "")),
509
errors=
510
'replace')))
511
for attr in
512
self.runtime_expansions)
513
331
escaped_attrs = dict((key, re.escape(str(val)))
332
for key, val in
333
vars(self).iteritems())
514
334
try:
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
335
command = self.check_command % escaped_attrs
336
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
519
339
return True # Try again later
520
self.current_checker_command = command
521
340
try:
522
logger.info("Starting checker %r for %s",
341
logger.info(u"Starting checker %r for %s",
523
342
command, self.name)
524
343
# We don't need to redirect stdout and stderr, since
525
344
# in normal mode, that is already done by daemon(),
528
347
self.checker = subprocess.Popen(command,
529
348
close_fds=True,
530
349
shell=True, cwd="/")
531
self.checker_callback_tag = (gobject.child_watch_add
532
(self.checker.pid,
533
self.checker_callback,
534
data=command))
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
538
if pid:
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
350
self.checker_callback_tag = gobject.child_watch_add\
351
(self.checker.pid,
352
self.checker_callback)
353
except OSError, error:
354
logger.error(u"Failed to start subprocess: %s",
543
355
error)
544
356
# Re-run this periodically if run by gobject.timeout_add
545
357
return True
546
547
358
def stop_checker(self):
548
359
"""Force the checker process, if any, to stop."""
549
360
if self.checker_callback_tag:
551
362
self.checker_callback_tag = None
552
363
if getattr(self, "checker", None) is None:
553
364
return
554
logger.debug("Stopping checker for %(name)s", vars(self))
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
555
366
try:
556
367
os.kill(self.checker.pid, signal.SIGTERM)
557
#time.sleep(0.5)
368
#os.sleep(0.5)
558
369
#if self.checker.poll() is None:
559
370
# os.kill(self.checker.pid, signal.SIGKILL)
560
except OSError as error:
371
except OSError, error:
561
372
if error.errno != errno.ESRCH: # No such process
562
373
raise
563
374
self.checker = None
564
565
566
def dbus_service_property(dbus_interface, signature="v",
567
access="readwrite", byte_arrays=False):
568
"""Decorators for marking methods of a DBusObjectWithProperties to
569
become properties on the D-Bus.
570
571
The decorated method will be called with no arguments by "Get"
572
and with one argument by "Set".
573
574
The parameters, where they are supported, are the same as
575
dbus.service.method, except there is only "signature", since the
576
type from Get() and the type sent to Set() is the same.
577
"""
578
# Encoding deeply encoded byte arrays is not supported yet by the
579
# "Set" method, so we fail early here:
580
if byte_arrays and signature != "ay":
581
raise ValueError("Byte arrays not supported for non-'ay'"
582
" signature %r" % signature)
583
def decorator(func):
584
func._dbus_is_property = True
585
func._dbus_interface = dbus_interface
586
func._dbus_signature = signature
587
func._dbus_access = access
588
func._dbus_name = func.__name__
589
if func._dbus_name.endswith("_dbus_property"):
590
func._dbus_name = func._dbus_name[:-14]
591
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
592
return func
593
return decorator
594
595
596
class DBusPropertyException(dbus.exceptions.DBusException):
597
"""A base class for D-Bus property-related exceptions
598
"""
599
def __unicode__(self):
600
return unicode(str(self))
601
602
603
class DBusPropertyAccessException(DBusPropertyException):
604
"""A property's access permissions disallows an operation.
605
"""
606
pass
607
608
609
class DBusPropertyNotFound(DBusPropertyException):
610
"""An attempt was made to access a non-existing property.
611
"""
612
pass
613
614
615
class DBusObjectWithProperties(dbus.service.Object):
616
"""A D-Bus object with properties.
617
618
Classes inheriting from this can use the dbus_service_property
619
decorator to expose methods as D-Bus properties. It exposes the
620
standard Get(), Set(), and GetAll() methods on the D-Bus.
621
"""
622
623
@staticmethod
624
def _is_dbus_property(obj):
625
return getattr(obj, "_dbus_is_property", False)
626
627
def _get_all_dbus_properties(self):
628
"""Returns a generator of (name, attribute) pairs
629
"""
630
return ((prop._dbus_name, prop)
631
for name, prop in
632
inspect.getmembers(self, self._is_dbus_property))
633
634
# def _get_dbus_property(self, interface_name, property_name):
635
# """Returns a bound method if one exists which is a D-Bus
636
# property with the specified name and interface.
637
# """
638
# print("get_property({0!r}, {1!r}".format(interface_name, property_name),file=sys.stderr)
639
# print(dir(self), sys.stderr)
640
# for name in (property_name,
641
# property_name + "_dbus_property"):
642
# prop = getattr(self, name, None)
643
# if (prop is None
644
# or not self._is_dbus_property(prop)
645
# or prop._dbus_name != property_name
646
# or (interface_name and prop._dbus_interface
647
# and interface_name != prop._dbus_interface)):
648
# continue
649
# return prop
650
# # No such property
651
# raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
# + interface_name + "."
653
# + property_name)
654
655
def _get_dbus_property(self, interface_name, property_name):
656
"""Returns a bound method if one exists which is a D-Bus
657
property with the specified name and interface.
658
"""
659
for name, value in inspect.getmembers(self, self._is_dbus_property):
660
if value._dbus_name == property_name and value._dbus_interface == interface_name:
661
return value
662
663
# No such property
664
raise DBusPropertyNotFound(self.dbus_object_path + ":"
665
+ interface_name + "."
666
+ property_name)
667
668
669
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
670
out_signature="v")
671
def Get(self, interface_name, property_name):
672
"""Standard D-Bus property Get() method, see D-Bus standard.
673
"""
674
prop = self._get_dbus_property(interface_name, property_name)
675
if prop._dbus_access == "write":
676
raise DBusPropertyAccessException(property_name)
677
value = prop()
678
if not hasattr(value, "variant_level"):
679
return value
680
return type(value)(value, variant_level=value.variant_level+1)
681
682
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
683
def Set(self, interface_name, property_name, value):
684
"""Standard D-Bus property Set() method, see D-Bus standard.
685
"""
686
prop = self._get_dbus_property(interface_name, property_name)
687
if prop._dbus_access == "read":
688
raise DBusPropertyAccessException(property_name)
689
if prop._dbus_get_args_options["byte_arrays"]:
690
# The byte_arrays option is not supported yet on
691
# signatures other than "ay".
692
if prop._dbus_signature != "ay":
693
raise ValueError
694
value = dbus.ByteArray(''.join(unichr(byte)
695
for byte in value))
696
prop(value)
697
698
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
699
out_signature="a{sv}")
700
def GetAll(self, interface_name):
701
"""Standard D-Bus property GetAll() method, see D-Bus
702
standard.
703
704
Note: Will not include properties with access="write".
705
"""
706
all = {}
707
for name, prop in self._get_all_dbus_properties():
708
if (interface_name
709
and interface_name != prop._dbus_interface):
710
# Interface non-empty but did not match
711
continue
712
# Ignore write-only properties
713
if prop._dbus_access == "write":
714
continue
715
value = prop()
716
if not hasattr(value, "variant_level"):
717
all[name] = value
718
continue
719
all[name] = type(value)(value, variant_level=
720
value.variant_level+1)
721
return dbus.Dictionary(all, signature="sv")
722
723
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
724
out_signature="s",
725
path_keyword='object_path',
726
connection_keyword='connection')
727
def Introspect(self, object_path, connection):
728
"""Standard D-Bus method, overloaded to insert property tags.
729
"""
730
xmlstring = dbus.service.Object.Introspect(self, object_path,
731
connection)
732
try:
733
document = xml.dom.minidom.parseString(xmlstring)
734
def make_tag(document, name, prop):
735
e = document.createElement("property")
736
e.setAttribute("name", name)
737
e.setAttribute("type", prop._dbus_signature)
738
e.setAttribute("access", prop._dbus_access)
739
return e
740
for if_tag in document.getElementsByTagName("interface"):
741
for tag in (make_tag(document, name, prop)
742
for name, prop
743
in self._get_all_dbus_properties()
744
if prop._dbus_interface
745
== if_tag.getAttribute("name")):
746
if_tag.appendChild(tag)
747
# Add the names to the return values for the
748
# "org.freedesktop.DBus.Properties" methods
749
if (if_tag.getAttribute("name")
750
== "org.freedesktop.DBus.Properties"):
751
for cn in if_tag.getElementsByTagName("method"):
752
if cn.getAttribute("name") == "Get":
753
for arg in cn.getElementsByTagName("arg"):
754
if (arg.getAttribute("direction")
755
== "out"):
756
arg.setAttribute("name", "value")
757
elif cn.getAttribute("name") == "GetAll":
758
for arg in cn.getElementsByTagName("arg"):
759
if (arg.getAttribute("direction")
760
== "out"):
761
arg.setAttribute("name", "props")
762
xmlstring = document.toxml("utf-8")
763
document.unlink()
764
except (AttributeError, xml.dom.DOMException,
765
xml.parsers.expat.ExpatError) as error:
766
logger.error("Failed to override Introspection method",
767
error)
768
return xmlstring
769
770
771
def datetime_to_dbus (dt, variant_level=0):
772
"""Convert a UTC datetime.datetime() to a D-Bus type."""
773
if dt is None:
774
return dbus.String("", variant_level = variant_level)
775
return dbus.String(dt.isoformat(),
776
variant_level=variant_level)
777
778
class transitional_clientdbus(DBusObjectWithProperties.__metaclass__):
779
def __new__(mcs, name, bases, attr):
780
for key, old_dbusobj in attr.items():
781
new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")
782
if getattr(old_dbusobj, "_dbus_is_signal", False):
783
unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,
784
old_dbusobj.__closure__))["func"].cell_contents
785
newfunc = types.FunctionType(unwrappedfunc.func_code,
786
unwrappedfunc.func_globals,
787
unwrappedfunc.func_name,
788
unwrappedfunc.func_defaults,
789
unwrappedfunc.func_closure)
790
new_dbusfunc = dbus.service.signal(
791
new_interface, old_dbusobj._dbus_signature)(newfunc)
792
attr["_transitional_{0}_1".format(key)] = new_dbusfunc
793
attr["_transitional_{0}_0".format(key)] = old_dbusobj
794
def fixscope(func1, func2):
795
def newcall(*args, **kwargs):
796
func1(*args, **kwargs)
797
func2(*args, **kwargs)
798
return newcall
799
800
attr[key] = fixscope(
801
old_dbusobj, attr["_transitional_{0}_1".format(key)])
802
803
if getattr(old_dbusobj, "_dbus_is_method", False):
804
new_dbusfunc = (dbus.service.method
805
(new_interface,
806
old_dbusobj._dbus_in_signature,
807
old_dbusobj._dbus_out_signature)
808
(types.FunctionType
809
(old_dbusobj.func_code,
810
old_dbusobj.func_globals,
811
old_dbusobj.func_name,
812
old_dbusobj.func_defaults,
813
old_dbusobj.func_closure)))
814
815
attr["_transitional_{0}".format(key)] = new_dbusfunc
816
if getattr(old_dbusobj, "_dbus_is_property", False):
817
new_dbusfunc = (dbus_service_property
818
(new_interface,
819
old_dbusobj._dbus_signature,
820
old_dbusobj._dbus_access,
821
old_dbusobj._dbus_get_args_options["byte_arrays"])
822
(types.FunctionType
823
(old_dbusobj.func_code,
824
old_dbusobj.func_globals,
825
old_dbusobj.func_name,
826
old_dbusobj.func_defaults,
827
old_dbusobj.func_closure)))
828
829
attr["_transitional_{0}".format(key)] = new_dbusfunc
830
return type.__new__(mcs, name, bases, attr)
831
832
class ClientDBus(Client, DBusObjectWithProperties):
833
"""A Client class using D-Bus
834
835
Attributes:
836
dbus_object_path: dbus.ObjectPath
837
bus: dbus.SystemBus()
838
"""
839
840
runtime_expansions = (Client.runtime_expansions
841
+ ("dbus_object_path",))
842
843
__metaclass__ = transitional_clientdbus
844
845
# dbus.service.Object doesn't use super(), so we can't either.
846
847
def __init__(self, bus = None, *args, **kwargs):
848
self._approvals_pending = 0
849
self.bus = bus
850
Client.__init__(self, *args, **kwargs)
851
# Only now, when this client is initialized, can it show up on
852
# the D-Bus
853
client_object_name = unicode(self.name).translate(
854
{ord("."): ord("_"),
855
ord("-"): ord("_")})
856
self.dbus_object_path = (dbus.ObjectPath
857
("/clients/" + client_object_name))
858
DBusObjectWithProperties.__init__(self, self.bus,
859
self.dbus_object_path)
860
861
def notifychangeproperty(transform_func,
862
dbus_name, type_func=lambda x: x,
863
variant_level=1):
864
""" Modify a variable so that its a property that announce its
865
changes to DBus.
866
transform_fun: Function that takes a value and transform it to
867
DBus type.
868
dbus_name: DBus name of the variable
869
type_func: Function that transform the value before sending it
870
to DBus
871
variant_level: DBus variant level. default: 1
872
"""
873
real_value = [None,]
874
def setter(self, value):
875
old_value = real_value[0]
876
real_value[0] = value
877
if hasattr(self, "dbus_object_path"):
878
if type_func(old_value) != type_func(real_value[0]):
879
dbus_value = transform_func(type_func(real_value[0]),
880
variant_level)
881
self.PropertyChanged(dbus.String(dbus_name),
882
dbus_value)
883
884
return property(lambda self: real_value[0], setter)
885
886
887
expires = notifychangeproperty(datetime_to_dbus, "Expires")
888
approvals_pending = notifychangeproperty(dbus.Boolean,
889
"ApprovalPending",
890
type_func = bool)
891
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
892
last_enabled = notifychangeproperty(datetime_to_dbus,
893
"LastEnabled")
894
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
895
type_func = lambda checker: checker is not None)
896
last_checked_ok = notifychangeproperty(datetime_to_dbus,
897
"LastCheckedOK")
898
last_approval_request = notifychangeproperty(datetime_to_dbus,
899
"LastApprovalRequest")
900
approved_by_default = notifychangeproperty(dbus.Boolean,
901
"ApprovedByDefault")
902
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
903
type_func = _timedelta_to_milliseconds)
904
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
905
type_func = _timedelta_to_milliseconds)
906
host = notifychangeproperty(dbus.String, "Host")
907
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
908
type_func = _timedelta_to_milliseconds)
909
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
910
type_func = _timedelta_to_milliseconds)
911
interval = notifychangeproperty(dbus.UInt16, "Interval",
912
type_func = _timedelta_to_milliseconds)
913
checker_command = notifychangeproperty(dbus.String, "Checker")
914
915
del notifychangeproperty
916
917
def __del__(self, *args, **kwargs):
918
try:
919
self.remove_from_connection()
920
except LookupError:
921
pass
922
if hasattr(DBusObjectWithProperties, "__del__"):
923
DBusObjectWithProperties.__del__(self, *args, **kwargs)
924
Client.__del__(self, *args, **kwargs)
925
926
def checker_callback(self, pid, condition, command,
927
*args, **kwargs):
928
self.checker_callback_tag = None
929
self.checker = None
930
if os.WIFEXITED(condition):
931
exitstatus = os.WEXITSTATUS(condition)
932
# Emit D-Bus signal
933
self.CheckerCompleted(dbus.Int16(exitstatus),
934
dbus.Int64(condition),
935
dbus.String(command))
936
else:
937
# Emit D-Bus signal
938
self.CheckerCompleted(dbus.Int16(-1),
939
dbus.Int64(condition),
940
dbus.String(command))
941
942
return Client.checker_callback(self, pid, condition, command,
943
*args, **kwargs)
944
945
def start_checker(self, *args, **kwargs):
946
old_checker = self.checker
947
if self.checker is not None:
948
old_checker_pid = self.checker.pid
949
else:
950
old_checker_pid = None
951
r = Client.start_checker(self, *args, **kwargs)
952
# Only if new checker process was started
953
if (self.checker is not None
954
and old_checker_pid != self.checker.pid):
955
# Emit D-Bus signal
956
self.CheckerStarted(self.current_checker_command)
957
return r
958
959
def _reset_approved(self):
960
self._approved = None
961
return False
962
963
def approve(self, value=True):
964
self.send_changedstate()
965
self._approved = value
966
gobject.timeout_add(_timedelta_to_milliseconds
967
(self.approval_duration),
968
self._reset_approved)
969
970
971
## D-Bus methods, signals & properties
972
_interface = "se.bsnet.fukt.Mandos.Client"
973
974
## Signals
975
976
# CheckerCompleted - signal
977
@dbus.service.signal(_interface, signature="nxs")
978
def CheckerCompleted(self, exitcode, waitstatus, command):
979
"D-Bus signal"
980
pass
981
982
# CheckerStarted - signal
983
@dbus.service.signal(_interface, signature="s")
984
def CheckerStarted(self, command):
985
"D-Bus signal"
986
pass
987
988
# PropertyChanged - signal
989
@dbus.service.signal(_interface, signature="sv")
990
def PropertyChanged(self, property, value):
991
"D-Bus signal"
992
pass
993
994
# GotSecret - signal
995
@dbus.service.signal(_interface)
996
def GotSecret(self):
997
"""D-Bus signal
998
Is sent after a successful transfer of secret from the Mandos
999
server to mandos-client
1000
"""
1001
pass
1002
1003
# Rejected - signal
1004
@dbus.service.signal(_interface, signature="s")
1005
def Rejected(self, reason):
1006
"D-Bus signal"
1007
pass
1008
1009
# NeedApproval - signal
1010
@dbus.service.signal(_interface, signature="tb")
1011
def NeedApproval(self, timeout, default):
1012
"D-Bus signal"
1013
return self.need_approval()
1014
1015
## Methods
1016
1017
# Approve - method
1018
@dbus.service.method(_interface, in_signature="b")
1019
def Approve(self, value):
1020
self.approve(value)
1021
1022
# CheckedOK - method
1023
@dbus.service.method(_interface)
1024
def CheckedOK(self):
1025
self.checked_ok()
1026
1027
# Enable - method
1028
@dbus.service.method(_interface)
1029
def Enable(self):
1030
"D-Bus method"
1031
self.enable()
1032
1033
# StartChecker - method
1034
@dbus.service.method(_interface)
1035
def StartChecker(self):
1036
"D-Bus method"
1037
self.start_checker()
1038
1039
# Disable - method
1040
@dbus.service.method(_interface)
1041
def Disable(self):
1042
"D-Bus method"
1043
self.disable()
1044
1045
# StopChecker - method
1046
@dbus.service.method(_interface)
1047
def StopChecker(self):
1048
self.stop_checker()
1049
1050
## Properties
1051
1052
# ApprovalPending - property
1053
@dbus_service_property(_interface, signature="b", access="read")
1054
def ApprovalPending_dbus_property(self):
1055
return dbus.Boolean(bool(self.approvals_pending))
1056
1057
# ApprovedByDefault - property
1058
@dbus_service_property(_interface, signature="b",
1059
access="readwrite")
1060
def ApprovedByDefault_dbus_property(self, value=None):
1061
if value is None: # get
1062
return dbus.Boolean(self.approved_by_default)
1063
self.approved_by_default = bool(value)
1064
1065
# ApprovalDelay - property
1066
@dbus_service_property(_interface, signature="t",
1067
access="readwrite")
1068
def ApprovalDelay_dbus_property(self, value=None):
1069
if value is None: # get
1070
return dbus.UInt64(self.approval_delay_milliseconds())
1071
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1072
1073
# ApprovalDuration - property
1074
@dbus_service_property(_interface, signature="t",
1075
access="readwrite")
1076
def ApprovalDuration_dbus_property(self, value=None):
1077
if value is None: # get
1078
return dbus.UInt64(_timedelta_to_milliseconds(
1079
self.approval_duration))
1080
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1081
1082
# Name - property
1083
@dbus_service_property(_interface, signature="s", access="read")
1084
def Name_dbus_property(self):
1085
return dbus.String(self.name)
1086
1087
# Fingerprint - property
1088
@dbus_service_property(_interface, signature="s", access="read")
1089
def Fingerprint_dbus_property(self):
1090
return dbus.String(self.fingerprint)
1091
1092
# Host - property
1093
@dbus_service_property(_interface, signature="s",
1094
access="readwrite")
1095
def Host_dbus_property(self, value=None):
1096
if value is None: # get
1097
return dbus.String(self.host)
1098
self.host = value
1099
1100
# Created - property
1101
@dbus_service_property(_interface, signature="s", access="read")
1102
def Created_dbus_property(self):
1103
return dbus.String(datetime_to_dbus(self.created))
1104
1105
# LastEnabled - property
1106
@dbus_service_property(_interface, signature="s", access="read")
1107
def LastEnabled_dbus_property(self):
1108
return datetime_to_dbus(self.last_enabled)
1109
1110
# Enabled - property
1111
@dbus_service_property(_interface, signature="b",
1112
access="readwrite")
1113
def Enabled_dbus_property(self, value=None):
1114
if value is None: # get
1115
return dbus.Boolean(self.enabled)
1116
if value:
1117
self.enable()
1118
else:
1119
self.disable()
1120
1121
# LastCheckedOK - property
1122
@dbus_service_property(_interface, signature="s",
1123
access="readwrite")
1124
def LastCheckedOK_dbus_property(self, value=None):
1125
if value is not None:
1126
self.checked_ok()
1127
return
1128
return datetime_to_dbus(self.last_checked_ok)
1129
1130
# Expires - property
1131
@dbus_service_property(_interface, signature="s", access="read")
1132
def Expires_dbus_property(self):
1133
return datetime_to_dbus(self.expires)
1134
1135
# LastApprovalRequest - property
1136
@dbus_service_property(_interface, signature="s", access="read")
1137
def LastApprovalRequest_dbus_property(self):
1138
return datetime_to_dbus(self.last_approval_request)
1139
1140
# Timeout - property
1141
@dbus_service_property(_interface, signature="t",
1142
access="readwrite")
1143
def Timeout_dbus_property(self, value=None):
1144
if value is None: # get
1145
return dbus.UInt64(self.timeout_milliseconds())
1146
self.timeout = datetime.timedelta(0, 0, 0, value)
1147
if getattr(self, "disable_initiator_tag", None) is None:
1148
return
1149
# Reschedule timeout
1150
gobject.source_remove(self.disable_initiator_tag)
1151
self.disable_initiator_tag = None
1152
self.expires = None
1153
time_to_die = (self.
1154
_timedelta_to_milliseconds((self
1155
.last_checked_ok
1156
+ self.timeout)
1157
- datetime.datetime
1158
.utcnow()))
1159
if time_to_die <= 0:
1160
# The timeout has passed
1161
self.disable()
1162
else:
1163
self.expires = (datetime.datetime.utcnow()
1164
+ datetime.timedelta(milliseconds = time_to_die))
1165
self.disable_initiator_tag = (gobject.timeout_add
1166
(time_to_die, self.disable))
1167
1168
# ExtendedTimeout - property
1169
@dbus_service_property(_interface, signature="t",
1170
access="readwrite")
1171
def ExtendedTimeout_dbus_property(self, value=None):
1172
if value is None: # get
1173
return dbus.UInt64(self.extended_timeout_milliseconds())
1174
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1175
1176
# Interval - property
1177
@dbus_service_property(_interface, signature="t",
1178
access="readwrite")
1179
def Interval_dbus_property(self, value=None):
1180
if value is None: # get
1181
return dbus.UInt64(self.interval_milliseconds())
1182
self.interval = datetime.timedelta(0, 0, 0, value)
1183
if getattr(self, "checker_initiator_tag", None) is None:
1184
return
1185
# Reschedule checker run
1186
gobject.source_remove(self.checker_initiator_tag)
1187
self.checker_initiator_tag = (gobject.timeout_add
1188
(value, self.start_checker))
1189
self.start_checker() # Start one now, too
1190
1191
# Checker - property
1192
@dbus_service_property(_interface, signature="s",
1193
access="readwrite")
1194
def Checker_dbus_property(self, value=None):
1195
if value is None: # get
1196
return dbus.String(self.checker_command)
1197
self.checker_command = value
1198
1199
# CheckerRunning - property
1200
@dbus_service_property(_interface, signature="b",
1201
access="readwrite")
1202
def CheckerRunning_dbus_property(self, value=None):
1203
if value is None: # get
1204
return dbus.Boolean(self.checker is not None)
1205
if value:
1206
self.start_checker()
1207
else:
1208
self.stop_checker()
1209
1210
# ObjectPath - property
1211
@dbus_service_property(_interface, signature="o", access="read")
1212
def ObjectPath_dbus_property(self):
1213
return self.dbus_object_path # is already a dbus.ObjectPath
1214
1215
# Secret = property
1216
@dbus_service_property(_interface, signature="ay",
1217
access="write", byte_arrays=True)
1218
def Secret_dbus_property(self, value):
1219
self.secret = str(value)
1220
1221
del _interface
1222
1223
1224
class ProxyClient(object):
1225
def __init__(self, child_pipe, fpr, address):
1226
self._pipe = child_pipe
1227
self._pipe.send(('init', fpr, address))
1228
if not self._pipe.recv():
1229
raise KeyError()
1230
1231
def __getattribute__(self, name):
1232
if(name == '_pipe'):
1233
return super(ProxyClient, self).__getattribute__(name)
1234
self._pipe.send(('getattr', name))
1235
data = self._pipe.recv()
1236
if data[0] == 'data':
1237
return data[1]
1238
if data[0] == 'function':
1239
def func(*args, **kwargs):
1240
self._pipe.send(('funcall', name, args, kwargs))
1241
return self._pipe.recv()[1]
1242
return func
1243
1244
def __setattr__(self, name, value):
1245
if(name == '_pipe'):
1246
return super(ProxyClient, self).__setattr__(name, value)
1247
self._pipe.send(('setattr', name, value))
1248
1249
1250
class ClientHandler(socketserver.BaseRequestHandler, object):
1251
"""A class to handle client connections.
1252
1253
Instantiated once for each connection to handle it.
375
def still_valid(self):
376
"""Has the timeout not yet passed for this client?"""
377
now = datetime.datetime.now()
378
if self.last_checked_ok is None:
379
return now < (self.created + self.timeout)
380
else:
381
return now < (self.last_checked_ok + self.timeout)
382
383
384
def peer_certificate(session):
385
"Return the peer's OpenPGP certificate as a bytestring"
386
# If not an OpenPGP certificate...
387
if gnutls.library.functions.gnutls_certificate_type_get\
388
(session._c_object) \
389
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
390
# ...do the normal thing
391
return session.peer_certificate
392
list_size = ctypes.c_uint()
393
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
394
(session._c_object, ctypes.byref(list_size))
395
if list_size.value == 0:
396
return None
397
cert = cert_list[0]
398
return ctypes.string_at(cert.data, cert.size)
399
400
401
def fingerprint(openpgp):
402
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# New empty GnuTLS certificate
409
crt = gnutls.library.types.gnutls_openpgp_crt_t()
410
gnutls.library.functions.gnutls_openpgp_crt_init\
411
(ctypes.byref(crt))
412
# Import the OpenPGP public key into the certificate
413
gnutls.library.functions.gnutls_openpgp_crt_import\
414
(crt, ctypes.byref(datum),
415
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
416
# Verify the self signature in the key
417
crtverify = ctypes.c_uint();
418
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
419
(crt, 0, ctypes.byref(crtverify))
420
if crtverify.value != 0:
421
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
422
raise gnutls.errors.CertificateSecurityError("Verify failed")
423
# New buffer for the fingerprint
424
buffer = ctypes.create_string_buffer(20)
425
buffer_length = ctypes.c_size_t()
426
# Get the fingerprint from the certificate into the buffer
427
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
428
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
429
# Deinit the certificate
430
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
431
# Convert the buffer to a Python bytestring
432
fpr = ctypes.string_at(buffer, buffer_length.value)
433
# Convert the bytestring to hexadecimal notation
434
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
435
return hex_fpr
436
437
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
439
"""A TCP request handler class.
440
Instantiated by IPv6_TCPServer for each request to handle it.
1254
441
Note: This will run in its own forked process."""
1255
442
1256
443
def handle(self):
1257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1258
logger.info("TCP connection from: %s",
1259
unicode(self.client_address))
1260
logger.debug("Pipe FD: %d",
1261
self.server.child_pipe.fileno())
1262
1263
session = (gnutls.connection
1264
.ClientSession(self.request,
1265
gnutls.connection
1266
.X509Credentials()))
1267
1268
# Note: gnutls.connection.X509Credentials is really a
1269
# generic GnuTLS certificate credentials object so long as
1270
# no X.509 keys are added to it. Therefore, we can use it
1271
# here despite using OpenPGP certificates.
1272
1273
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1274
# "+AES-256-CBC", "+SHA1",
1275
# "+COMP-NULL", "+CTYPE-OPENPGP",
1276
# "+DHE-DSS"))
1277
# Use a fallback default, since this MUST be set.
1278
priority = self.server.gnutls_priority
1279
if priority is None:
1280
priority = "NORMAL"
1281
(gnutls.library.functions
1282
.gnutls_priority_set_direct(session._c_object,
1283
priority, None))
1284
1285
# Start communication using the Mandos protocol
1286
# Get protocol number
1287
line = self.request.makefile().readline()
1288
logger.debug("Protocol version: %r", line)
1289
try:
1290
if int(line.strip().split()[0]) > 1:
1291
raise RuntimeError
1292
except (ValueError, IndexError, RuntimeError) as error:
1293
logger.error("Unknown protocol version: %s", error)
1294
return
1295
1296
# Start GnuTLS connection
1297
try:
1298
session.handshake()
1299
except gnutls.errors.GNUTLSError as error:
1300
logger.warning("Handshake failed: %s", error)
1301
# Do not run session.bye() here: the session is not
1302
# established. Just abandon the request.
1303
return
1304
logger.debug("Handshake succeeded")
1305
1306
approval_required = False
1307
try:
1308
try:
1309
fpr = self.fingerprint(self.peer_certificate
1310
(session))
1311
except (TypeError,
1312
gnutls.errors.GNUTLSError) as error:
1313
logger.warning("Bad certificate: %s", error)
1314
return
1315
logger.debug("Fingerprint: %s", fpr)
1316
1317
try:
1318
client = ProxyClient(child_pipe, fpr,
1319
self.client_address)
1320
except KeyError:
1321
return
1322
1323
if client.approval_delay:
1324
delay = client.approval_delay
1325
client.approvals_pending += 1
1326
approval_required = True
1327
1328
while True:
1329
if not client.enabled:
1330
logger.info("Client %s is disabled",
1331
client.name)
1332
if self.server.use_dbus:
1333
# Emit D-Bus signal
1334
client.Rejected("Disabled")
1335
return
1336
1337
if client._approved or not client.approval_delay:
1338
#We are approved or approval is disabled
1339
break
1340
elif client._approved is None:
1341
logger.info("Client %s needs approval",
1342
client.name)
1343
if self.server.use_dbus:
1344
# Emit D-Bus signal
1345
client.NeedApproval(
1346
client.approval_delay_milliseconds(),
1347
client.approved_by_default)
1348
else:
1349
logger.warning("Client %s was not approved",
1350
client.name)
1351
if self.server.use_dbus:
1352
# Emit D-Bus signal
1353
client.Rejected("Denied")
1354
return
1355
1356
#wait until timeout or approved
1357
#x = float(client._timedelta_to_milliseconds(delay))
1358
time = datetime.datetime.now()
1359
client.changedstate.acquire()
1360
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1361
client.changedstate.release()
1362
time2 = datetime.datetime.now()
1363
if (time2 - time) >= delay:
1364
if not client.approved_by_default:
1365
logger.warning("Client %s timed out while"
1366
" waiting for approval",
1367
client.name)
1368
if self.server.use_dbus:
1369
# Emit D-Bus signal
1370
client.Rejected("Approval timed out")
1371
return
1372
else:
1373
break
1374
else:
1375
delay -= time2 - time
1376
1377
sent_size = 0
1378
while sent_size < len(client.secret):
1379
try:
1380
sent = session.send(client.secret[sent_size:])
1381
except gnutls.errors.GNUTLSError as error:
1382
logger.warning("gnutls send failed")
1383
return
1384
logger.debug("Sent: %d, remaining: %d",
1385
sent, len(client.secret)
1386
- (sent_size + sent))
1387
sent_size += sent
1388
1389
logger.info("Sending secret to %s", client.name)
1390
# bump the timeout as if seen
1391
client.checked_ok(client.extended_timeout)
1392
if self.server.use_dbus:
1393
# Emit D-Bus signal
1394
client.GotSecret()
1395
1396
finally:
1397
if approval_required:
1398
client.approvals_pending -= 1
1399
try:
1400
session.bye()
1401
except gnutls.errors.GNUTLSError as error:
1402
logger.warning("GnuTLS bye failed")
1403
1404
@staticmethod
1405
def peer_certificate(session):
1406
"Return the peer's OpenPGP certificate as a bytestring"
1407
# If not an OpenPGP certificate...
1408
if (gnutls.library.functions
1409
.gnutls_certificate_type_get(session._c_object)
1410
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1411
# ...do the normal thing
1412
return session.peer_certificate
1413
list_size = ctypes.c_uint(1)
1414
cert_list = (gnutls.library.functions
1415
.gnutls_certificate_get_peers
1416
(session._c_object, ctypes.byref(list_size)))
1417
if not bool(cert_list) and list_size.value != 0:
1418
raise gnutls.errors.GNUTLSError("error getting peer"
1419
" certificate")
1420
if list_size.value == 0:
1421
return None
1422
cert = cert_list[0]
1423
return ctypes.string_at(cert.data, cert.size)
1424
1425
@staticmethod
1426
def fingerprint(openpgp):
1427
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1428
# New GnuTLS "datum" with the OpenPGP public key
1429
datum = (gnutls.library.types
1430
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1431
ctypes.POINTER
1432
(ctypes.c_ubyte)),
1433
ctypes.c_uint(len(openpgp))))
1434
# New empty GnuTLS certificate
1435
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1436
(gnutls.library.functions
1437
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1438
# Import the OpenPGP public key into the certificate
1439
(gnutls.library.functions
1440
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1441
gnutls.library.constants
1442
.GNUTLS_OPENPGP_FMT_RAW))
1443
# Verify the self signature in the key
1444
crtverify = ctypes.c_uint()
1445
(gnutls.library.functions
1446
.gnutls_openpgp_crt_verify_self(crt, 0,
1447
ctypes.byref(crtverify)))
1448
if crtverify.value != 0:
1449
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1450
raise (gnutls.errors.CertificateSecurityError
1451
("Verify failed"))
1452
# New buffer for the fingerprint
1453
buf = ctypes.create_string_buffer(20)
1454
buf_len = ctypes.c_size_t()
1455
# Get the fingerprint from the certificate into the buffer
1456
(gnutls.library.functions
1457
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1458
ctypes.byref(buf_len)))
1459
# Deinit the certificate
1460
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1461
# Convert the buffer to a Python bytestring
1462
fpr = ctypes.string_at(buf, buf_len.value)
1463
# Convert the bytestring to hexadecimal notation
1464
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1465
return hex_fpr
1466
1467
1468
class MultiprocessingMixIn(object):
1469
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1470
def sub_process_main(self, request, address):
1471
try:
1472
self.finish_request(request, address)
1473
except:
1474
self.handle_error(request, address)
1475
self.close_request(request)
1476
1477
def process_request(self, request, address):
1478
"""Start a new process to process the request."""
1479
multiprocessing.Process(target = self.sub_process_main,
1480
args = (request, address)).start()
1481
1482
1483
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1484
""" adds a pipe to the MixIn """
1485
def process_request(self, request, client_address):
1486
"""Overrides and wraps the original process_request().
1487
1488
This function creates a new pipe in self.pipe
1489
"""
1490
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1491
1492
super(MultiprocessingMixInWithPipe,
1493
self).process_request(request, client_address)
1494
self.child_pipe.close()
1495
self.add_pipe(parent_pipe)
1496
1497
def add_pipe(self, parent_pipe):
1498
"""Dummy function; override as necessary"""
1499
raise NotImplementedError
1500
1501
1502
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1503
socketserver.TCPServer, object):
1504
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1505
444
logger.info(u"TCP connection from: %s",
445
unicode(self.client_address))
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
449
line = self.request.makefile().readline()
450
logger.debug(u"Protocol version: %r", line)
451
try:
452
if int(line.strip().split()[0]) > 1:
453
raise RuntimeError
454
except (ValueError, IndexError, RuntimeError), error:
455
logger.error(u"Unknown protocol version: %s", error)
456
return
457
458
# Note: gnutls.connection.X509Credentials is really a generic
459
# GnuTLS certificate credentials object so long as no X.509
460
# keys are added to it. Therefore, we can use it here despite
461
# using OpenPGP certificates.
462
463
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
464
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
465
# "+DHE-DSS"))
466
priority = "NORMAL" # Fallback default, since this
467
# MUST be set.
468
if self.server.settings["priority"]:
469
priority = self.server.settings["priority"]
470
gnutls.library.functions.gnutls_priority_set_direct\
471
(session._c_object, priority, None);
472
473
try:
474
session.handshake()
475
except gnutls.errors.GNUTLSError, error:
476
logger.warning(u"Handshake failed: %s", error)
477
# Do not run session.bye() here: the session is not
478
# established. Just abandon the request.
479
return
480
try:
481
fpr = fingerprint(peer_certificate(session))
482
except (TypeError, gnutls.errors.GNUTLSError), error:
483
logger.warning(u"Bad certificate: %s", error)
484
session.bye()
485
return
486
logger.debug(u"Fingerprint: %s", fpr)
487
client = None
488
for c in self.server.clients:
489
if c.fingerprint == fpr:
490
client = c
491
break
492
if not client:
493
logger.warning(u"Client not found for fingerprint: %s",
494
fpr)
495
session.bye()
496
return
497
# Have to check if client.still_valid(), since it is possible
498
# that the client timed out while establishing the GnuTLS
499
# session.
500
if not client.still_valid():
501
logger.warning(u"Client %(name)s is invalid",
502
vars(client))
503
session.bye()
504
return
505
sent_size = 0
506
while sent_size < len(client.secret):
507
sent = session.send(client.secret[sent_size:])
508
logger.debug(u"Sent: %d, remaining: %d",
509
sent, len(client.secret)
510
- (sent_size + sent))
511
sent_size += sent
512
session.bye()
513
514
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
516
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1506
517
Attributes:
1507
enabled: Boolean; whether this server is activated yet
1508
interface: None or a network interface name (string)
1509
use_ipv6: Boolean; to use IPv6 or not
518
settings: Server settings
519
clients: Set() of Client objects
1510
520
"""
1511
def __init__(self, server_address, RequestHandlerClass,
1512
interface=None, use_ipv6=True):
1513
self.interface = interface
1514
if use_ipv6:
1515
self.address_family = socket.AF_INET6
1516
socketserver.TCPServer.__init__(self, server_address,
1517
RequestHandlerClass)
521
address_family = socket.AF_INET6
522
def __init__(self, *args, **kwargs):
523
if "settings" in kwargs:
524
self.settings = kwargs["settings"]
525
del kwargs["settings"]
526
if "clients" in kwargs:
527
self.clients = kwargs["clients"]
528
del kwargs["clients"]
529
return super(type(self), self).__init__(*args, **kwargs)
1518
530
def server_bind(self):
1519
531
"""This overrides the normal server_bind() function
1520
532
to bind to an interface if one was specified, and also NOT to
1521
533
bind to an address or port if they were not specified."""
1522
if self.interface is not None:
1523
if SO_BINDTODEVICE is None:
1524
logger.error("SO_BINDTODEVICE does not exist;"
1525
" cannot bind to interface %s",
1526
self.interface)
1527
else:
1528
try:
1529
self.socket.setsockopt(socket.SOL_SOCKET,
1530
SO_BINDTODEVICE,
1531
str(self.interface
1532
+ '\0'))
1533
except socket.error as error:
1534
if error[0] == errno.EPERM:
1535
logger.error("No permission to"
1536
" bind to interface %s",
1537
self.interface)
1538
elif error[0] == errno.ENOPROTOOPT:
1539
logger.error("SO_BINDTODEVICE not available;"
1540
" cannot bind to interface %s",
1541
self.interface)
1542
else:
1543
raise
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
537
try:
538
self.socket.setsockopt(socket.SOL_SOCKET,
539
SO_BINDTODEVICE,
540
self.settings["interface"])
541
except socket.error, error:
542
if error[0] == errno.EPERM:
543
logger.error(u"No permission to"
544
u" bind to interface %s",
545
self.settings["interface"])
546
else:
547
raise error
1544
548
# Only bind(2) the socket if we really need to.
1545
549
if self.server_address[0] or self.server_address[1]:
1546
550
if not self.server_address[0]:
1547
if self.address_family == socket.AF_INET6:
1548
any_address = "::" # in6addr_any
1549
else:
1550
any_address = socket.INADDR_ANY
1551
self.server_address = (any_address,
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
1552
553
self.server_address[1])
1553
554
elif not self.server_address[1]:
1554
555
self.server_address = (self.server_address[0],
1555
556
0)
1556
# if self.interface:
557
# if self.settings["interface"]:
1557
558
# self.server_address = (self.server_address[0],
1558
559
# 0, # port
1559
560
# 0, # flowinfo
1560
561
# if_nametoindex
1561
# (self.interface))
1562
return socketserver.TCPServer.server_bind(self)
1563
1564
1565
class MandosServer(IPv6_TCPServer):
1566
"""Mandos server.
1567
1568
Attributes:
1569
clients: set of Client objects
1570
gnutls_priority GnuTLS priority string
1571
use_dbus: Boolean; to emit D-Bus signals or not
1572
1573
Assumes a gobject.MainLoop event loop.
1574
"""
1575
def __init__(self, server_address, RequestHandlerClass,
1576
interface=None, use_ipv6=True, clients=None,
1577
gnutls_priority=None, use_dbus=True):
1578
self.enabled = False
1579
self.clients = clients
1580
if self.clients is None:
1581
self.clients = set()
1582
self.use_dbus = use_dbus
1583
self.gnutls_priority = gnutls_priority
1584
IPv6_TCPServer.__init__(self, server_address,
1585
RequestHandlerClass,
1586
interface = interface,
1587
use_ipv6 = use_ipv6)
1588
def server_activate(self):
1589
if self.enabled:
1590
return socketserver.TCPServer.server_activate(self)
1591
def enable(self):
1592
self.enabled = True
1593
def add_pipe(self, parent_pipe):
1594
# Call "handle_ipc" for both data and EOF events
1595
gobject.io_add_watch(parent_pipe.fileno(),
1596
gobject.IO_IN | gobject.IO_HUP,
1597
functools.partial(self.handle_ipc,
1598
parent_pipe = parent_pipe))
1599
1600
def handle_ipc(self, source, condition, parent_pipe=None,
1601
client_object=None):
1602
condition_names = {
1603
gobject.IO_IN: "IN", # There is data to read.
1604
gobject.IO_OUT: "OUT", # Data can be written (without
1605
# blocking).
1606
gobject.IO_PRI: "PRI", # There is urgent data to read.
1607
gobject.IO_ERR: "ERR", # Error condition.
1608
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1609
# broken, usually for pipes and
1610
# sockets).
1611
}
1612
conditions_string = ' | '.join(name
1613
for cond, name in
1614
condition_names.iteritems()
1615
if cond & condition)
1616
# error or the other end of multiprocessing.Pipe has closed
1617
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1618
return False
1619
1620
# Read a request from the child
1621
request = parent_pipe.recv()
1622
command = request[0]
1623
1624
if command == 'init':
1625
fpr = request[1]
1626
address = request[2]
1627
1628
for c in self.clients:
1629
if c.fingerprint == fpr:
1630
client = c
1631
break
1632
else:
1633
logger.info("Client not found for fingerprint: %s, ad"
1634
"dress: %s", fpr, address)
1635
if self.use_dbus:
1636
# Emit D-Bus signal
1637
mandos_dbus_service.ClientNotFound(fpr, address[0])
1638
parent_pipe.send(False)
1639
return False
1640
1641
gobject.io_add_watch(parent_pipe.fileno(),
1642
gobject.IO_IN | gobject.IO_HUP,
1643
functools.partial(self.handle_ipc,
1644
parent_pipe = parent_pipe,
1645
client_object = client))
1646
parent_pipe.send(True)
1647
# remove the old hook in favor of the new above hook on same fileno
1648
return False
1649
if command == 'funcall':
1650
funcname = request[1]
1651
args = request[2]
1652
kwargs = request[3]
1653
1654
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1655
1656
if command == 'getattr':
1657
attrname = request[1]
1658
if callable(client_object.__getattribute__(attrname)):
1659
parent_pipe.send(('function',))
1660
else:
1661
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1662
1663
if command == 'setattr':
1664
attrname = request[1]
1665
value = request[2]
1666
setattr(client_object, attrname, value)
1667
1668
return True
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
1669
565
1670
566
1671
567
def string_to_delta(interval):
1672
568
"""Parse a string and return a datetime.timedelta
1673
569
1674
570
>>> string_to_delta('7d')
1675
571
datetime.timedelta(7)
1676
572
>>> string_to_delta('60s')
1679
575
datetime.timedelta(0, 3600)
1680
576
>>> string_to_delta('24h')
1681
577
datetime.timedelta(1)
1682
>>> string_to_delta('1w')
578
>>> string_to_delta(u'1w')
1683
579
datetime.timedelta(7)
1684
580
>>> string_to_delta('5m 30s')
1685
581
datetime.timedelta(0, 330)
1687
583
timevalue = datetime.timedelta(0)
1688
584
for s in interval.split():
1689
585
try:
1690
suffix = unicode(s[-1])
1691
value = int(s[:-1])
1692
if suffix == "d":
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
588
if suffix == u"d":
1693
589
delta = datetime.timedelta(value)
1694
elif suffix == "s":
590
elif suffix == u"s":
1695
591
delta = datetime.timedelta(0, value)
1696
elif suffix == "m":
592
elif suffix == u"m":
1697
593
delta = datetime.timedelta(0, 0, 0, 0, value)
1698
elif suffix == "h":
594
elif suffix == u"h":
1699
595
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1700
elif suffix == "w":
596
elif suffix == u"w":
1701
597
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1702
598
else:
1703
raise ValueError("Unknown suffix %r" % suffix)
1704
except (ValueError, IndexError) as e:
1705
raise ValueError(*(e.args))
599
raise ValueError
600
except (ValueError, IndexError):
601
raise ValueError
1706
602
timevalue += delta
1707
603
return timevalue
1708
604
1709
605
606
def server_state_changed(state):
607
"""Derived from the Avahi example code"""
608
if state == avahi.SERVER_COLLISION:
609
logger.error(u"Zeroconf server name collision")
610
service.remove()
611
elif state == avahi.SERVER_RUNNING:
612
service.add()
613
614
615
def entry_group_state_changed(state, error):
616
"""Derived from the Avahi example code"""
617
logger.debug(u"Avahi state change: %i", state)
618
619
if state == avahi.ENTRY_GROUP_ESTABLISHED:
620
logger.debug(u"Zeroconf service established.")
621
elif state == avahi.ENTRY_GROUP_COLLISION:
622
logger.warning(u"Zeroconf service name collision.")
623
service.rename()
624
elif state == avahi.ENTRY_GROUP_FAILURE:
625
logger.critical(u"Avahi: Error in group state changed %s",
626
unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
628
1710
629
def if_nametoindex(interface):
1711
"""Call the C function if_nametoindex(), or equivalent
1712
1713
Note: This function cannot accept a unicode string."""
630
"""Call the C function if_nametoindex(), or equivalent"""
1714
631
global if_nametoindex
1715
632
try:
1716
if_nametoindex = (ctypes.cdll.LoadLibrary
1717
(ctypes.util.find_library("c"))
1718
.if_nametoindex)
633
if "ctypes.util" not in sys.modules:
634
import ctypes.util
635
if_nametoindex = ctypes.cdll.LoadLibrary\
636
(ctypes.util.find_library("c")).if_nametoindex
1719
637
except (OSError, AttributeError):
1720
logger.warning("Doing if_nametoindex the hard way")
638
if "struct" not in sys.modules:
639
import struct
640
if "fcntl" not in sys.modules:
641
import fcntl
1721
642
def if_nametoindex(interface):
1722
643
"Get an interface index the hard way, i.e. using fcntl()"
1723
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1724
with contextlib.closing(socket.socket()) as s:
1725
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1726
struct.pack(str("16s16x"),
1727
interface))
1728
interface_index = struct.unpack(str("I"),
1729
ifreq[16:20])[0]
645
s = socket.socket()
646
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
647
struct.pack("16s16x", interface))
648
s.close()
649
interface_index = struct.unpack("I", ifreq[16:20])[0]
1730
650
return interface_index
1731
651
return if_nametoindex(interface)
1732
652
1733
653
1734
654
def daemon(nochdir = False, noclose = False):
1735
655
"""See daemon(3). Standard BSD Unix function.
1736
1737
656
This should really exist as os.daemon, but it doesn't (yet)."""
1738
657
if os.fork():
1739
658
sys.exit()
1747
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1748
667
if not stat.S_ISCHR(os.fstat(null).st_mode):
1749
668
raise OSError(errno.ENODEV,
1750
"%s not a character device"
1751
% os.path.devnull)
669
"/dev/null not a character device")
1752
670
os.dup2(null, sys.stdin.fileno())
1753
671
os.dup2(null, sys.stdout.fileno())
1754
672
os.dup2(null, sys.stderr.fileno())
1757
675
1758
676
1759
677
def main():
1760
1761
##################################################################
1762
# Parsing of options, both command line and config file
1763
1764
parser = argparse.ArgumentParser()
1765
parser.add_argument("-v", "--version", action="version",
1766
version = "%%(prog)s %s" % version,
1767
help="show version number and exit")
1768
parser.add_argument("-i", "--interface", metavar="IF",
1769
help="Bind to interface IF")
1770
parser.add_argument("-a", "--address",
1771
help="Address to listen for requests on")
1772
parser.add_argument("-p", "--port", type=int,
1773
help="Port number to receive requests on")
1774
parser.add_argument("--check", action="store_true",
1775
help="Run self-test")
1776
parser.add_argument("--debug", action="store_true",
1777
help="Debug mode; run in foreground and log"
1778
" to terminal")
1779
parser.add_argument("--debuglevel", metavar="LEVEL",
1780
help="Debug level for stdout output")
1781
parser.add_argument("--priority", help="GnuTLS"
1782
" priority string (see GnuTLS documentation)")
1783
parser.add_argument("--servicename",
1784
metavar="NAME", help="Zeroconf service name")
1785
parser.add_argument("--configdir",
1786
default="/etc/mandos", metavar="DIR",
1787
help="Directory to search for configuration"
1788
" files")
1789
parser.add_argument("--no-dbus", action="store_false",
1790
dest="use_dbus", help="Do not provide D-Bus"
1791
" system bus interface")
1792
parser.add_argument("--no-ipv6", action="store_false",
1793
dest="use_ipv6", help="Do not use IPv6")
1794
options = parser.parse_args()
678
global main_loop_started
679
main_loop_started = False
680
681
parser = OptionParser(version = "%%prog %s" % version)
682
parser.add_option("-i", "--interface", type="string",
683
metavar="IF", help="Bind to interface IF")
684
parser.add_option("-a", "--address", type="string",
685
help="Address to listen for requests on")
686
parser.add_option("-p", "--port", type="int",
687
help="Port number to receive requests on")
688
parser.add_option("--check", action="store_true", default=False,
689
help="Run self-test")
690
parser.add_option("--debug", action="store_true",
691
help="Debug mode; run in foreground and log to"
692
" terminal")
693
parser.add_option("--priority", type="string", help="GnuTLS"
694
" priority string (see GnuTLS documentation)")
695
parser.add_option("--servicename", type="string", metavar="NAME",
696
help="Zeroconf service name")
697
parser.add_option("--configdir", type="string",
698
default="/etc/mandos", metavar="DIR",
699
help="Directory to search for configuration"
700
" files")
701
(options, args) = parser.parse_args()
1795
702
1796
703
if options.check:
1797
704
import doctest
1806
713
"priority":
1807
714
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1808
715
"servicename": "Mandos",
1809
"use_dbus": "True",
1810
"use_ipv6": "True",
1811
"debuglevel": "",
1812
716
}
1813
717
1814
718
# Parse config file for server-global settings
1815
server_config = configparser.SafeConfigParser(server_defaults)
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
1816
720
del server_defaults
1817
server_config.read(os.path.join(options.configdir,
1818
"mandos.conf"))
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1819
722
# Convert the SafeConfigParser object to a dict
1820
723
server_settings = server_config.defaults()
1821
# Use the appropriate methods on the non-string config options
1822
for option in ("debug", "use_dbus", "use_ipv6"):
1823
server_settings[option] = server_config.getboolean("DEFAULT",
1824
option)
1825
if server_settings["port"]:
1826
server_settings["port"] = server_config.getint("DEFAULT",
1827
"port")
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
1828
727
del server_config
1829
728
1830
729
# Override the settings from the config file with command line
1831
730
# options, if set.
1832
731
for option in ("interface", "address", "port", "debug",
1833
"priority", "servicename", "configdir",
1834
"use_dbus", "use_ipv6", "debuglevel"):
732
"priority", "servicename", "configdir"):
1835
733
value = getattr(options, option)
1836
734
if value is not None:
1837
735
server_settings[option] = value
1838
736
del options
1839
# Force all strings to be unicode
1840
for option in server_settings.keys():
1841
if type(server_settings[option]) is str:
1842
server_settings[option] = unicode(server_settings[option])
1843
737
# Now we have our good server settings in "server_settings"
1844
738
1845
##################################################################
1846
1847
# For convenience
1848
739
debug = server_settings["debug"]
1849
debuglevel = server_settings["debuglevel"]
1850
use_dbus = server_settings["use_dbus"]
1851
use_ipv6 = server_settings["use_ipv6"]
740
741
if not debug:
742
syslogger.setLevel(logging.WARNING)
743
console.setLevel(logging.WARNING)
1852
744
1853
745
if server_settings["servicename"] != "Mandos":
1854
syslogger.setFormatter(logging.Formatter
1855
('Mandos (%s) [%%(process)d]:'
1856
' %%(levelname)s: %%(message)s'
746
syslogger.setFormatter(logging.Formatter\
747
('Mandos (%s): %%(levelname)s:'
748
' %%(message)s'
1857
749
% server_settings["servicename"]))
1858
750
1859
751
# Parse config file with clients
1860
client_defaults = { "timeout": "5m",
1861
"extended_timeout": "15m",
1862
"interval": "2m",
1863
"checker": "fping -q -- %%(host)s",
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
1864
755
"host": "",
1865
"approval_delay": "0s",
1866
"approval_duration": "1s",
1867
756
}
1868
client_config = configparser.SafeConfigParser(client_defaults)
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
1869
758
client_config.read(os.path.join(server_settings["configdir"],
1870
759
"clients.conf"))
1871
760
1872
global mandos_dbus_service
1873
mandos_dbus_service = None
1874
1875
tcp_server = MandosServer((server_settings["address"],
1876
server_settings["port"]),
1877
ClientHandler,
1878
interface=(server_settings["interface"]
1879
or None),
1880
use_ipv6=use_ipv6,
1881
gnutls_priority=
1882
server_settings["priority"],
1883
use_dbus=use_dbus)
1884
if not debug:
1885
pidfilename = "/var/run/mandos.pid"
1886
try:
1887
pidfile = open(pidfilename, "w")
1888
except IOError:
1889
logger.error("Could not open file %r", pidfilename)
1890
1891
try:
1892
uid = pwd.getpwnam("_mandos").pw_uid
1893
gid = pwd.getpwnam("_mandos").pw_gid
1894
except KeyError:
1895
try:
1896
uid = pwd.getpwnam("mandos").pw_uid
1897
gid = pwd.getpwnam("mandos").pw_gid
1898
except KeyError:
1899
try:
1900
uid = pwd.getpwnam("nobody").pw_uid
1901
gid = pwd.getpwnam("nobody").pw_gid
1902
except KeyError:
1903
uid = 65534
1904
gid = 65534
1905
try:
1906
os.setgid(gid)
1907
os.setuid(uid)
1908
except OSError as error:
1909
if error[0] != errno.EPERM:
1910
raise error
1911
1912
if not debug and not debuglevel:
1913
syslogger.setLevel(logging.WARNING)
1914
console.setLevel(logging.WARNING)
1915
if debuglevel:
1916
level = getattr(logging, debuglevel.upper())
1917
syslogger.setLevel(level)
1918
console.setLevel(level)
761
global service
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
764
if server_settings["interface"]:
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
767
768
global main_loop
769
global bus
770
global server
771
# From the Avahi example code
772
DBusGMainLoop(set_as_default=True )
773
main_loop = gobject.MainLoop()
774
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
778
# End of Avahi example code
779
780
clients = Set()
781
def remove_from_clients(client):
782
clients.remove(client)
783
if not clients:
784
logger.critical(u"No clients left, exiting")
785
sys.exit()
786
787
clients.update(Set(Client(name = section,
788
stop_hook = remove_from_clients,
789
config
790
= dict(client_config.items(section)))
791
for section in client_config.sections()))
792
if not clients:
793
logger.critical(u"No clients defined")
794
sys.exit(1)
1919
795
1920
796
if debug:
1921
# Enable all possible GnuTLS debugging
1922
1923
# "Use a log level over 10 to enable all debugging options."
1924
# - GnuTLS manual
1925
gnutls.library.functions.gnutls_global_set_log_level(11)
1926
1927
@gnutls.library.types.gnutls_log_func
1928
def debug_gnutls(level, string):
1929
logger.debug("GnuTLS: %s", string[:-1])
1930
1931
(gnutls.library.functions
1932
.gnutls_global_set_log_function(debug_gnutls))
1933
1934
797
# Redirect stdin so all checkers get /dev/null
1935
798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1936
799
os.dup2(null, sys.stdin.fileno())
1939
802
else:
1940
803
# No console logging
1941
804
logger.removeHandler(console)
1942
1943
# Need to fork before connecting to D-Bus
1944
if not debug:
1945
805
# Close all input and output, do double fork, etc.
1946
806
daemon()
1947
807
1948
global main_loop
1949
# From the Avahi example code
1950
DBusGMainLoop(set_as_default=True )
1951
main_loop = gobject.MainLoop()
1952
bus = dbus.SystemBus()
1953
# End of Avahi example code
1954
if use_dbus:
1955
try:
1956
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1957
bus, do_not_queue=True)
1958
bus_name2 = dbus.service.BusName("se.recompile.Mandos",
1959
bus, do_not_queue=True)
1960
except dbus.exceptions.NameExistsException as e:
1961
logger.error(unicode(e) + ", disabling D-Bus")
1962
use_dbus = False
1963
server_settings["use_dbus"] = False
1964
tcp_server.use_dbus = False
1965
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1966
service = AvahiService(name = server_settings["servicename"],
1967
servicetype = "_mandos._tcp",
1968
protocol = protocol, bus = bus)
1969
if server_settings["interface"]:
1970
service.interface = (if_nametoindex
1971
(str(server_settings["interface"])))
1972
1973
global multiprocessing_manager
1974
multiprocessing_manager = multiprocessing.Manager()
1975
1976
client_class = Client
1977
if use_dbus:
1978
client_class = functools.partial(ClientDBus, bus = bus)
1979
def client_config_items(config, section):
1980
special_settings = {
1981
"approved_by_default":
1982
lambda: config.getboolean(section,
1983
"approved_by_default"),
1984
}
1985
for name, value in config.items(section):
1986
try:
1987
yield (name, special_settings[name]())
1988
except KeyError:
1989
yield (name, value)
1990
1991
tcp_server.clients.update(set(
1992
client_class(name = section,
1993
config= dict(client_config_items(
1994
client_config, section)))
1995
for section in client_config.sections()))
1996
if not tcp_server.clients:
1997
logger.warning("No clients defined")
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
810
try:
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
814
del pidfile
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
818
819
def cleanup():
820
"Cleanup function; run on exit"
821
global group
822
# From the Avahi example code
823
if not group is None:
824
group.Free()
825
group = None
826
# End of Avahi example code
1998
827
828
while clients:
829
client = clients.pop()
830
client.stop_hook = None
831
client.stop()
832
833
atexit.register(cleanup)
834
1999
835
if not debug:
2000
try:
2001
with pidfile:
2002
pid = os.getpid()
2003
pidfile.write(str(pid) + "\n".encode("utf-8"))
2004
del pidfile
2005
except IOError:
2006
logger.error("Could not write to file %r with PID %d",
2007
pidfilename, pid)
2008
except NameError:
2009
# "pidfile" was never created
2010
pass
2011
del pidfilename
2012
2013
836
signal.signal(signal.SIGINT, signal.SIG_IGN)
2014
2015
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2016
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2017
839
2018
if use_dbus:
2019
class MandosDBusService(dbus.service.Object):
2020
"""A D-Bus proxy object"""
2021
def __init__(self):
2022
dbus.service.Object.__init__(self, bus, "/")
2023
_interface = "se.bsnet.fukt.Mandos"
2024
2025
@dbus.service.signal(_interface, signature="o")
2026
def ClientAdded(self, objpath):
2027
"D-Bus signal"
2028
pass
2029
2030
@dbus.service.signal(_interface, signature="ss")
2031
def ClientNotFound(self, fingerprint, address):
2032
"D-Bus signal"
2033
pass
2034
2035
@dbus.service.signal(_interface, signature="os")
2036
def ClientRemoved(self, objpath, name):
2037
"D-Bus signal"
2038
pass
2039
2040
@dbus.service.method(_interface, out_signature="ao")
2041
def GetAllClients(self):
2042
"D-Bus method"
2043
return dbus.Array(c.dbus_object_path
2044
for c in tcp_server.clients)
2045
2046
@dbus.service.method(_interface,
2047
out_signature="a{oa{sv}}")
2048
def GetAllClientsWithProperties(self):
2049
"D-Bus method"
2050
return dbus.Dictionary(
2051
((c.dbus_object_path, c.GetAll(""))
2052
for c in tcp_server.clients),
2053
signature="oa{sv}")
2054
2055
@dbus.service.method(_interface, in_signature="o")
2056
def RemoveClient(self, object_path):
2057
"D-Bus method"
2058
for c in tcp_server.clients:
2059
if c.dbus_object_path == object_path:
2060
tcp_server.clients.remove(c)
2061
c.remove_from_connection()
2062
# Don't signal anything except ClientRemoved
2063
c.disable(quiet=True)
2064
# Emit D-Bus signal
2065
self.ClientRemoved(object_path, c.name)
2066
return
2067
raise KeyError(object_path)
2068
2069
del _interface
2070
2071
mandos_dbus_service = MandosDBusService()
2072
2073
def cleanup():
2074
"Cleanup function; run on exit"
2075
service.cleanup()
2076
2077
while tcp_server.clients:
2078
client = tcp_server.clients.pop()
2079
if use_dbus:
2080
client.remove_from_connection()
2081
client.disable_hook = None
2082
# Don't signal anything except ClientRemoved
2083
client.disable(quiet=True)
2084
if use_dbus:
2085
# Emit D-Bus signal
2086
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2087
client.name)
2088
2089
atexit.register(cleanup)
2090
2091
for client in tcp_server.clients:
2092
if use_dbus:
2093
# Emit D-Bus signal
2094
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2095
client.enable()
2096
2097
tcp_server.enable()
2098
tcp_server.server_activate()
2099
840
for client in clients:
841
client.start()
842
843
tcp_server = IPv6_TCPServer((server_settings["address"],
844
server_settings["port"]),
845
tcp_handler,
846
settings=server_settings,
847
clients=clients)
2100
848
# Find out what port we got
2101
849
service.port = tcp_server.socket.getsockname()[1]
2102
if use_ipv6:
2103
logger.info("Now listening on address %r, port %d,"
2104
" flowinfo %d, scope_id %d"
2105
% tcp_server.socket.getsockname())
2106
else: # IPv4
2107
logger.info("Now listening on address %r, port %d"
2108
% tcp_server.socket.getsockname())
850
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
851
u" scope_id %d" % tcp_server.socket.getsockname())
2109
852
2110
853
#service.interface = tcp_server.socket.getsockname()[3]
2111
854
2112
855
try:
2113
856
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
2114
858
try:
2115
service.activate()
2116
except dbus.exceptions.DBusException as error:
2117
logger.critical("DBusException: %s", error)
2118
cleanup()
859
server_state_changed(server.GetState())
860
except dbus.exceptions.DBusException, error:
861
logger.critical(u"DBusException: %s", error)
2119
862
sys.exit(1)
2120
863
# End of Avahi example code
2121
864
2122
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2123
866
lambda *args, **kwargs:
2124
(tcp_server.handle_request
2125
(*args[2:], **kwargs) or True))
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
2126
869
2127
logger.debug("Starting main loop")
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
2128
872
main_loop.run()
2129
except AvahiError as error:
2130
logger.critical("AvahiError: %s", error)
2131
cleanup()
873
except AvahiError, error:
874
logger.critical(u"AvahiError: %s" + unicode(error))
2132
875
sys.exit(1)
2133
876
except KeyboardInterrupt:
2134
877
if debug:
2135
print("", file=sys.stderr)
2136
logger.debug("Server received KeyboardInterrupt")
2137
logger.debug("Server exiting")
2138
# Must run before the D-Bus bus name gets deregistered
2139
cleanup()
2140
878
print
2141
879
2142
880
if __name__ == '__main__':
2143
881
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0