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- Committer: Teddy Hogeborn
- Date: 2011-04-02 06:37:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20110402063718-13ldrcuu0t33sdc4
* mandos: Tolerate restarting Avahi servers. Also Changed to new
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
- files added:
- DBUS-API
- debian/source
- 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" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
31
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
import SocketServer
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
44
45
import gnutls.library.functions
45
46
import gnutls.library.constants
46
47
import gnutls.library.types
47
import ConfigParser
48
import ConfigParser as configparser
48
49
import sys
49
50
import re
50
51
import os
51
52
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
58
import pwd
59
from contextlib import closing
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
60
65
61
66
import dbus
62
67
import dbus.service
65
70
from dbus.mainloop.glib import DBusGMainLoop
66
71
import ctypes
67
72
import ctypes.util
68
69
version = "1.0.7"
70
73
import xml.dom.minidom
74
import inspect
75
76
try:
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
except AttributeError:
79
try:
80
from IN import SO_BINDTODEVICE
81
except ImportError:
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.0"
86
87
#logger = logging.getLogger('mandos')
71
88
logger = logging.Logger('mandos')
72
89
syslogger = (logging.handlers.SysLogHandler
73
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
91
address = str("/dev/log")))
75
92
syslogger.setFormatter(logging.Formatter
76
93
('Mandos [%(process)d]: %(levelname)s:'
77
94
' %(message)s'))
79
96
80
97
console = logging.StreamHandler()
81
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
99
' %(levelname)s:'
100
' %(message)s'))
83
101
logger.addHandler(console)
84
102
85
103
class AvahiError(Exception):
98
116
99
117
class AvahiService(object):
100
118
"""An Avahi (Zeroconf) service.
119
101
120
Attributes:
102
121
interface: integer; avahi.IF_UNSPEC or an interface index.
103
122
Used to optionally bind to the specified interface.
111
130
max_renames: integer; maximum number of renames
112
131
rename_count: integer; counter so we only rename after collisions
113
132
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
114
136
"""
115
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
138
servicetype = None, port = None, TXT = None,
117
139
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
140
protocol = avahi.PROTO_UNSPEC, bus = None):
119
141
self.interface = interface
120
142
self.name = name
121
143
self.type = servicetype
126
148
self.rename_count = 0
127
149
self.max_renames = max_renames
128
150
self.protocol = protocol
151
self.group = None # our entry group
152
self.server = None
153
self.bus = bus
154
self.entry_group_state_changed_match = None
129
155
def rename(self):
130
156
"""Derived from the Avahi example code"""
131
157
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
158
logger.critical("No suitable Zeroconf service name found"
159
" after %i retries, exiting.",
134
160
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
161
raise AvahiServiceError("Too many renames")
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
163
logger.info("Changing Zeroconf service name to %r ...",
164
self.name)
139
165
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
142
169
self.remove()
143
self.add()
170
try:
171
self.add()
172
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
144
176
self.rename_count += 1
145
177
def remove(self):
146
178
"""Derived from the Avahi example code"""
147
if group is not None:
148
group.Reset()
179
if self.group is not None:
180
try:
181
self.group.Free()
182
except (dbus.exceptions.UnknownMethodException,
183
dbus.exceptions.DBusException) as e:
184
pass
185
self.group = None
186
if self.entry_group_state_changed_match is not None:
187
self.entry_group_state_changed_match.remove()
188
self.entry_group_state_changed_match = None
149
189
def add(self):
150
190
"""Derived from the Avahi example code"""
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
171
# From the Avahi example code:
172
group = None # our entry group
173
# End of Avahi example code
174
175
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
191
self.remove()
192
self.group = dbus.Interface(
193
self.bus.get_object(avahi.DBUS_NAME,
194
self.server.EntryGroupNew(),
195
follow_name_owner_changes=True),
196
avahi.DBUS_INTERFACE_ENTRY_GROUP)
197
self.entry_group_state_changed_match = (
198
self.group.connect_to_signal(
199
'StateChanged', self .entry_group_state_changed))
200
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
201
self.name, self.type)
202
self.group.AddService(
203
self.interface,
204
self.protocol,
205
dbus.UInt32(0), # flags
206
self.name, self.type,
207
self.domain, self.host,
208
dbus.UInt16(self.port),
209
avahi.string_array_to_txt_array(self.TXT))
210
self.group.Commit()
211
def entry_group_state_changed(self, state, error):
212
"""Derived from the Avahi example code"""
213
logger.debug("Avahi entry group state change: %i", state)
214
215
if state == avahi.ENTRY_GROUP_ESTABLISHED:
216
logger.debug("Zeroconf service established.")
217
elif state == avahi.ENTRY_GROUP_COLLISION:
218
logger.info("Zeroconf service name collision.")
219
self.rename()
220
elif state == avahi.ENTRY_GROUP_FAILURE:
221
logger.critical("Avahi: Error in group state changed %s",
222
unicode(error))
223
raise AvahiGroupError("State changed: %s"
224
% unicode(error))
225
def cleanup(self):
226
"""Derived from the Avahi example code"""
227
self.remove()
228
def server_state_changed(self, state, error=None):
229
"""Derived from the Avahi example code"""
230
logger.debug("Avahi server state change: %i", state)
231
bad_states = { avahi.SERVER_INVALID:
232
"Zeroconf server invalid",
233
avahi.SERVER_REGISTERING: None,
234
avahi.SERVER_COLLISION:
235
"Zeroconf server name collision",
236
avahi.SERVER_FAILURE:
237
"Zeroconf server failure" }
238
if state in bad_states:
239
if bad_states[state]:
240
logger.error(bad_states[state])
241
self.remove()
242
elif state == avahi.SERVER_RUNNING:
243
self.add()
244
else:
245
logger.debug("Unknown state: %r", state)
246
def activate(self):
247
"""Derived from the Avahi example code"""
248
if self.server is None:
249
self.server = dbus.Interface(
250
self.bus.get_object(avahi.DBUS_NAME,
251
avahi.DBUS_PATH_SERVER,
252
follow_name_owner_changes=True),
253
avahi.DBUS_INTERFACE_SERVER)
254
self.server.connect_to_signal("StateChanged",
255
self.server_state_changed)
256
self.server_state_changed(self.server.GetState())
257
258
259
class Client(object):
182
260
"""A representation of a client host served by this server.
261
183
262
Attributes:
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
186
fingerprint: string (40 or 32 hexadecimal digits); used to
187
uniquely identify the client
188
secret: bytestring; sent verbatim (over TLS) to client
189
host: string; available for use by the checker command
190
created: datetime.datetime(); (UTC) object creation
191
last_enabled: datetime.datetime(); (UTC)
192
enabled: bool()
193
last_checked_ok: datetime.datetime(); (UTC) or None
194
timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
196
interval: datetime.timedelta(); How often to start a new checker
197
disable_hook: If set, called by disable() as disable_hook(self)
263
_approved: bool(); 'None' if not yet approved/disapproved
264
approval_delay: datetime.timedelta(); Time to wait for approval
265
approval_duration: datetime.timedelta(); Duration of one approval
198
266
checker: subprocess.Popen(); a running checker process used
199
267
to see if the client lives.
200
268
'None' if no process is running.
201
checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
203
checker_callback_tag: - '' -
204
checker_command: string; External command which is run to check if
205
client lives. %() expansions are done at
269
checker_callback_tag: a gobject event source tag, or None
270
checker_command: string; External command which is run to check
271
if client lives. %() expansions are done at
206
272
runtime with vars(self) as dict, so that for
207
273
instance %(name)s can be used in the command.
274
checker_initiator_tag: a gobject event source tag, or None
275
created: datetime.datetime(); (UTC) object creation
208
276
current_checker_command: string; current running checker_command
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
277
disable_hook: If set, called by disable() as disable_hook(self)
278
disable_initiator_tag: a gobject event source tag, or None
279
enabled: bool()
280
fingerprint: string (40 or 32 hexadecimal digits); used to
281
uniquely identify the client
282
host: string; available for use by the checker command
283
interval: datetime.timedelta(); How often to start a new checker
284
last_approval_request: datetime.datetime(); (UTC) or None
285
last_checked_ok: datetime.datetime(); (UTC) or None
286
last_enabled: datetime.datetime(); (UTC)
287
name: string; from the config file, used in log messages and
288
D-Bus identifiers
289
secret: bytestring; sent verbatim (over TLS) to client
290
timeout: datetime.timedelta(); How long from last_checked_ok
291
until this client is disabled
292
runtime_expansions: Allowed attributes for runtime expansion.
211
293
"""
294
295
runtime_expansions = ("approval_delay", "approval_duration",
296
"created", "enabled", "fingerprint",
297
"host", "interval", "last_checked_ok",
298
"last_enabled", "name", "timeout")
299
300
@staticmethod
301
def _timedelta_to_milliseconds(td):
302
"Convert a datetime.timedelta() to milliseconds"
303
return ((td.days * 24 * 60 * 60 * 1000)
304
+ (td.seconds * 1000)
305
+ (td.microseconds // 1000))
306
212
307
def timeout_milliseconds(self):
213
308
"Return the 'timeout' attribute in milliseconds"
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
309
return self._timedelta_to_milliseconds(self.timeout)
217
310
218
311
def interval_milliseconds(self):
219
312
"Return the 'interval' attribute in milliseconds"
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
313
return self._timedelta_to_milliseconds(self.interval)
314
315
def approval_delay_milliseconds(self):
316
return self._timedelta_to_milliseconds(self.approval_delay)
223
317
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
318
def __init__(self, name = None, disable_hook=None, config=None):
226
319
"""Note: the 'checker' key in 'config' sets the
227
320
'checker_command' attribute and *not* the 'checker'
228
321
attribute."""
229
322
self.name = name
230
323
if config is None:
231
324
config = {}
232
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
325
logger.debug("Creating client %r", self.name)
234
326
# Uppercase and remove spaces from fingerprint for later
235
327
# comparison purposes with return value from the fingerprint()
236
328
# function
237
329
self.fingerprint = (config["fingerprint"].upper()
238
.replace(u" ", u""))
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
330
.replace(" ", ""))
331
logger.debug(" Fingerprint: %s", self.fingerprint)
240
332
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
333
self.secret = config["secret"].decode("base64")
242
334
elif "secfile" in config:
243
with closing(open(os.path.expanduser
244
(os.path.expandvars
245
(config["secfile"])))) as secfile:
335
with open(os.path.expanduser(os.path.expandvars
336
(config["secfile"])),
337
"rb") as secfile:
246
338
self.secret = secfile.read()
247
339
else:
248
raise TypeError(u"No secret or secfile for client %s"
340
raise TypeError("No secret or secfile for client %s"
249
341
% self.name)
250
342
self.host = config.get("host", "")
251
343
self.created = datetime.datetime.utcnow()
252
344
self.enabled = False
345
self.last_approval_request = None
253
346
self.last_enabled = None
254
347
self.last_checked_ok = None
255
348
self.timeout = string_to_delta(config["timeout"])
262
355
self.checker_command = config["checker"]
263
356
self.current_checker_command = None
264
357
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
358
self._approved = None
359
self.approved_by_default = config.get("approved_by_default",
360
True)
361
self.approvals_pending = 0
362
self.approval_delay = string_to_delta(
363
config["approval_delay"])
364
self.approval_duration = string_to_delta(
365
config["approval_duration"])
366
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
274
367
368
def send_changedstate(self):
369
self.changedstate.acquire()
370
self.changedstate.notify_all()
371
self.changedstate.release()
372
275
373
def enable(self):
276
374
"""Start this client's checker and timeout hooks"""
375
if getattr(self, "enabled", False):
376
# Already enabled
377
return
378
self.send_changedstate()
277
379
self.last_enabled = datetime.datetime.utcnow()
278
380
# Schedule a new checker to be started an 'interval' from now,
279
381
# and every interval from then on.
280
382
self.checker_initiator_tag = (gobject.timeout_add
281
383
(self.interval_milliseconds(),
282
384
self.start_checker))
283
# Also start a new checker *right now*.
284
self.start_checker()
285
385
# Schedule a disable() when 'timeout' has passed
286
386
self.disable_initiator_tag = (gobject.timeout_add
287
387
(self.timeout_milliseconds(),
288
388
self.disable))
289
389
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
390
# Also start a new checker *right now*.
391
self.start_checker()
297
392
298
def disable(self):
393
def disable(self, quiet=True):
299
394
"""Disable this client."""
300
395
if not getattr(self, "enabled", False):
301
396
return False
302
logger.info(u"Disabling client %s", self.name)
397
if not quiet:
398
self.send_changedstate()
399
if not quiet:
400
logger.info("Disabling client %s", self.name)
303
401
if getattr(self, "disable_initiator_tag", False):
304
402
gobject.source_remove(self.disable_initiator_tag)
305
403
self.disable_initiator_tag = None
310
408
if self.disable_hook:
311
409
self.disable_hook(self)
312
410
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
317
411
# Do not run this again if called by a gobject.timeout_add
318
412
return False
319
413
325
419
"""The checker has completed, so take appropriate actions."""
326
420
self.checker_callback_tag = None
327
421
self.checker = None
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
332
422
if os.WIFEXITED(condition):
333
423
exitstatus = os.WEXITSTATUS(condition)
334
424
if exitstatus == 0:
335
logger.info(u"Checker for %(name)s succeeded",
425
logger.info("Checker for %(name)s succeeded",
336
426
vars(self))
337
427
self.checked_ok()
338
428
else:
339
logger.info(u"Checker for %(name)s failed",
429
logger.info("Checker for %(name)s failed",
340
430
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
346
431
else:
347
logger.warning(u"Checker for %(name)s crashed?",
432
logger.warning("Checker for %(name)s crashed?",
348
433
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
354
434
355
435
def checked_ok(self):
356
436
"""Bump up the timeout for this client.
437
357
438
This should only be called when the client has been seen,
358
439
alive and well.
359
440
"""
362
443
self.disable_initiator_tag = (gobject.timeout_add
363
444
(self.timeout_milliseconds(),
364
445
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
446
447
def need_approval(self):
448
self.last_approval_request = datetime.datetime.utcnow()
371
449
372
450
def start_checker(self):
373
451
"""Start a new checker subprocess if one is not running.
452
374
453
If a checker already exists, leave it running and do
375
454
nothing."""
376
455
# The reason for not killing a running checker is that if we
379
458
# client would inevitably timeout, since no checker would get
380
459
# a chance to run to completion. If we instead leave running
381
460
# checkers alone, the checker would have to take more time
382
# than 'timeout' for the client to be declared invalid, which
383
# is as it should be.
461
# than 'timeout' for the client to be disabled, which is as it
462
# should be.
384
463
385
464
# If a checker exists, make sure it is not a zombie
386
if self.checker is not None:
465
try:
387
466
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
467
except (AttributeError, OSError) as error:
468
if (isinstance(error, OSError)
469
and error.errno != errno.ECHILD):
470
raise error
471
else:
388
472
if pid:
389
473
logger.warning("Checker was a zombie")
390
474
gobject.source_remove(self.checker_callback_tag)
397
481
command = self.checker_command % self.host
398
482
except TypeError:
399
483
# Escape attributes for the shell
400
escaped_attrs = dict((key, re.escape(str(val)))
401
for key, val in
402
vars(self).iteritems())
484
escaped_attrs = dict(
485
(attr,
486
re.escape(unicode(str(getattr(self, attr, "")),
487
errors=
488
'replace')))
489
for attr in
490
self.runtime_expansions)
491
403
492
try:
404
493
command = self.checker_command % escaped_attrs
405
except TypeError, error:
406
logger.error(u'Could not format string "%s":'
407
u' %s', self.checker_command, error)
494
except TypeError as error:
495
logger.error('Could not format string "%s":'
496
' %s', self.checker_command, error)
408
497
return True # Try again later
409
self.current_checker_command = command
498
self.current_checker_command = command
410
499
try:
411
logger.info(u"Starting checker %r for %s",
500
logger.info("Starting checker %r for %s",
412
501
command, self.name)
413
502
# We don't need to redirect stdout and stderr, since
414
503
# in normal mode, that is already done by daemon(),
417
506
self.checker = subprocess.Popen(command,
418
507
close_fds=True,
419
508
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
426
509
self.checker_callback_tag = (gobject.child_watch_add
427
510
(self.checker.pid,
428
511
self.checker_callback,
433
516
if pid:
434
517
gobject.source_remove(self.checker_callback_tag)
435
518
self.checker_callback(pid, status, command)
436
except OSError, error:
437
logger.error(u"Failed to start subprocess: %s",
519
except OSError as error:
520
logger.error("Failed to start subprocess: %s",
438
521
error)
439
522
# Re-run this periodically if run by gobject.timeout_add
440
523
return True
446
529
self.checker_callback_tag = None
447
530
if getattr(self, "checker", None) is None:
448
531
return
449
logger.debug(u"Stopping checker for %(name)s", vars(self))
532
logger.debug("Stopping checker for %(name)s", vars(self))
450
533
try:
451
534
os.kill(self.checker.pid, signal.SIGTERM)
452
#os.sleep(0.5)
535
#time.sleep(0.5)
453
536
#if self.checker.poll() is None:
454
537
# os.kill(self.checker.pid, signal.SIGKILL)
455
except OSError, error:
538
except OSError as error:
456
539
if error.errno != errno.ESRCH: # No such process
457
540
raise
458
541
self.checker = None
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
462
463
def still_valid(self):
464
"""Has the timeout not yet passed for this client?"""
465
if not getattr(self, "enabled", False):
466
return False
467
now = datetime.datetime.utcnow()
468
if self.last_checked_ok is None:
469
return now < (self.created + self.timeout)
470
else:
471
return now < (self.last_checked_ok + self.timeout)
472
473
## D-Bus methods & signals
474
_interface = u"se.bsnet.fukt.Mandos.Client"
475
476
# CheckedOK - method
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
542
543
def dbus_service_property(dbus_interface, signature="v",
544
access="readwrite", byte_arrays=False):
545
"""Decorators for marking methods of a DBusObjectWithProperties to
546
become properties on the D-Bus.
547
548
The decorated method will be called with no arguments by "Get"
549
and with one argument by "Set".
550
551
The parameters, where they are supported, are the same as
552
dbus.service.method, except there is only "signature", since the
553
type from Get() and the type sent to Set() is the same.
554
"""
555
# Encoding deeply encoded byte arrays is not supported yet by the
556
# "Set" method, so we fail early here:
557
if byte_arrays and signature != "ay":
558
raise ValueError("Byte arrays not supported for non-'ay'"
559
" signature %r" % signature)
560
def decorator(func):
561
func._dbus_is_property = True
562
func._dbus_interface = dbus_interface
563
func._dbus_signature = signature
564
func._dbus_access = access
565
func._dbus_name = func.__name__
566
if func._dbus_name.endswith("_dbus_property"):
567
func._dbus_name = func._dbus_name[:-14]
568
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
569
return func
570
return decorator
571
572
573
class DBusPropertyException(dbus.exceptions.DBusException):
574
"""A base class for D-Bus property-related exceptions
575
"""
576
def __unicode__(self):
577
return unicode(str(self))
578
579
580
class DBusPropertyAccessException(DBusPropertyException):
581
"""A property's access permissions disallows an operation.
582
"""
583
pass
584
585
586
class DBusPropertyNotFound(DBusPropertyException):
587
"""An attempt was made to access a non-existing property.
588
"""
589
pass
590
591
592
class DBusObjectWithProperties(dbus.service.Object):
593
"""A D-Bus object with properties.
594
595
Classes inheriting from this can use the dbus_service_property
596
decorator to expose methods as D-Bus properties. It exposes the
597
standard Get(), Set(), and GetAll() methods on the D-Bus.
598
"""
599
600
@staticmethod
601
def _is_dbus_property(obj):
602
return getattr(obj, "_dbus_is_property", False)
603
604
def _get_all_dbus_properties(self):
605
"""Returns a generator of (name, attribute) pairs
606
"""
607
return ((prop._dbus_name, prop)
608
for name, prop in
609
inspect.getmembers(self, self._is_dbus_property))
610
611
def _get_dbus_property(self, interface_name, property_name):
612
"""Returns a bound method if one exists which is a D-Bus
613
property with the specified name and interface.
614
"""
615
for name in (property_name,
616
property_name + "_dbus_property"):
617
prop = getattr(self, name, None)
618
if (prop is None
619
or not self._is_dbus_property(prop)
620
or prop._dbus_name != property_name
621
or (interface_name and prop._dbus_interface
622
and interface_name != prop._dbus_interface)):
623
continue
624
return prop
625
# No such property
626
raise DBusPropertyNotFound(self.dbus_object_path + ":"
627
+ interface_name + "."
628
+ property_name)
629
630
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
631
out_signature="v")
632
def Get(self, interface_name, property_name):
633
"""Standard D-Bus property Get() method, see D-Bus standard.
634
"""
635
prop = self._get_dbus_property(interface_name, property_name)
636
if prop._dbus_access == "write":
637
raise DBusPropertyAccessException(property_name)
638
value = prop()
639
if not hasattr(value, "variant_level"):
640
return value
641
return type(value)(value, variant_level=value.variant_level+1)
642
643
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
644
def Set(self, interface_name, property_name, value):
645
"""Standard D-Bus property Set() method, see D-Bus standard.
646
"""
647
prop = self._get_dbus_property(interface_name, property_name)
648
if prop._dbus_access == "read":
649
raise DBusPropertyAccessException(property_name)
650
if prop._dbus_get_args_options["byte_arrays"]:
651
# The byte_arrays option is not supported yet on
652
# signatures other than "ay".
653
if prop._dbus_signature != "ay":
654
raise ValueError
655
value = dbus.ByteArray(''.join(unichr(byte)
656
for byte in value))
657
prop(value)
658
659
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
660
out_signature="a{sv}")
661
def GetAll(self, interface_name):
662
"""Standard D-Bus property GetAll() method, see D-Bus
663
standard.
664
665
Note: Will not include properties with access="write".
666
"""
667
all = {}
668
for name, prop in self._get_all_dbus_properties():
669
if (interface_name
670
and interface_name != prop._dbus_interface):
671
# Interface non-empty but did not match
672
continue
673
# Ignore write-only properties
674
if prop._dbus_access == "write":
675
continue
676
value = prop()
677
if not hasattr(value, "variant_level"):
678
all[name] = value
679
continue
680
all[name] = type(value)(value, variant_level=
681
value.variant_level+1)
682
return dbus.Dictionary(all, signature="sv")
683
684
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
685
out_signature="s",
686
path_keyword='object_path',
687
connection_keyword='connection')
688
def Introspect(self, object_path, connection):
689
"""Standard D-Bus method, overloaded to insert property tags.
690
"""
691
xmlstring = dbus.service.Object.Introspect(self, object_path,
692
connection)
693
try:
694
document = xml.dom.minidom.parseString(xmlstring)
695
def make_tag(document, name, prop):
696
e = document.createElement("property")
697
e.setAttribute("name", name)
698
e.setAttribute("type", prop._dbus_signature)
699
e.setAttribute("access", prop._dbus_access)
700
return e
701
for if_tag in document.getElementsByTagName("interface"):
702
for tag in (make_tag(document, name, prop)
703
for name, prop
704
in self._get_all_dbus_properties()
705
if prop._dbus_interface
706
== if_tag.getAttribute("name")):
707
if_tag.appendChild(tag)
708
# Add the names to the return values for the
709
# "org.freedesktop.DBus.Properties" methods
710
if (if_tag.getAttribute("name")
711
== "org.freedesktop.DBus.Properties"):
712
for cn in if_tag.getElementsByTagName("method"):
713
if cn.getAttribute("name") == "Get":
714
for arg in cn.getElementsByTagName("arg"):
715
if (arg.getAttribute("direction")
716
== "out"):
717
arg.setAttribute("name", "value")
718
elif cn.getAttribute("name") == "GetAll":
719
for arg in cn.getElementsByTagName("arg"):
720
if (arg.getAttribute("direction")
721
== "out"):
722
arg.setAttribute("name", "props")
723
xmlstring = document.toxml("utf-8")
724
document.unlink()
725
except (AttributeError, xml.dom.DOMException,
726
xml.parsers.expat.ExpatError) as error:
727
logger.error("Failed to override Introspection method",
728
error)
729
return xmlstring
730
731
732
class ClientDBus(Client, DBusObjectWithProperties):
733
"""A Client class using D-Bus
734
735
Attributes:
736
dbus_object_path: dbus.ObjectPath
737
bus: dbus.SystemBus()
738
"""
739
740
runtime_expansions = (Client.runtime_expansions
741
+ ("dbus_object_path",))
742
743
# dbus.service.Object doesn't use super(), so we can't either.
744
745
def __init__(self, bus = None, *args, **kwargs):
746
self._approvals_pending = 0
747
self.bus = bus
748
Client.__init__(self, *args, **kwargs)
749
# Only now, when this client is initialized, can it show up on
750
# the D-Bus
751
client_object_name = unicode(self.name).translate(
752
{ord("."): ord("_"),
753
ord("-"): ord("_")})
754
self.dbus_object_path = (dbus.ObjectPath
755
("/clients/" + client_object_name))
756
DBusObjectWithProperties.__init__(self, self.bus,
757
self.dbus_object_path)
758
759
def _get_approvals_pending(self):
760
return self._approvals_pending
761
def _set_approvals_pending(self, value):
762
old_value = self._approvals_pending
763
self._approvals_pending = value
764
bval = bool(value)
765
if (hasattr(self, "dbus_object_path")
766
and bval is not bool(old_value)):
767
dbus_bool = dbus.Boolean(bval, variant_level=1)
768
self.PropertyChanged(dbus.String("ApprovalPending"),
769
dbus_bool)
770
771
approvals_pending = property(_get_approvals_pending,
772
_set_approvals_pending)
773
del _get_approvals_pending, _set_approvals_pending
774
775
@staticmethod
776
def _datetime_to_dbus(dt, variant_level=0):
777
"""Convert a UTC datetime.datetime() to a D-Bus type."""
778
return dbus.String(dt.isoformat(),
779
variant_level=variant_level)
780
781
def enable(self):
782
oldstate = getattr(self, "enabled", False)
783
r = Client.enable(self)
784
if oldstate != self.enabled:
785
# Emit D-Bus signals
786
self.PropertyChanged(dbus.String("Enabled"),
787
dbus.Boolean(True, variant_level=1))
788
self.PropertyChanged(
789
dbus.String("LastEnabled"),
790
self._datetime_to_dbus(self.last_enabled,
791
variant_level=1))
792
return r
793
794
def disable(self, quiet = False):
795
oldstate = getattr(self, "enabled", False)
796
r = Client.disable(self, quiet=quiet)
797
if not quiet and oldstate != self.enabled:
798
# Emit D-Bus signal
799
self.PropertyChanged(dbus.String("Enabled"),
800
dbus.Boolean(False, variant_level=1))
801
return r
802
803
def __del__(self, *args, **kwargs):
804
try:
805
self.remove_from_connection()
806
except LookupError:
807
pass
808
if hasattr(DBusObjectWithProperties, "__del__"):
809
DBusObjectWithProperties.__del__(self, *args, **kwargs)
810
Client.__del__(self, *args, **kwargs)
811
812
def checker_callback(self, pid, condition, command,
813
*args, **kwargs):
814
self.checker_callback_tag = None
815
self.checker = None
816
# Emit D-Bus signal
817
self.PropertyChanged(dbus.String("CheckerRunning"),
818
dbus.Boolean(False, variant_level=1))
819
if os.WIFEXITED(condition):
820
exitstatus = os.WEXITSTATUS(condition)
821
# Emit D-Bus signal
822
self.CheckerCompleted(dbus.Int16(exitstatus),
823
dbus.Int64(condition),
824
dbus.String(command))
825
else:
826
# Emit D-Bus signal
827
self.CheckerCompleted(dbus.Int16(-1),
828
dbus.Int64(condition),
829
dbus.String(command))
830
831
return Client.checker_callback(self, pid, condition, command,
832
*args, **kwargs)
833
834
def checked_ok(self, *args, **kwargs):
835
Client.checked_ok(self, *args, **kwargs)
836
# Emit D-Bus signal
837
self.PropertyChanged(
838
dbus.String("LastCheckedOK"),
839
(self._datetime_to_dbus(self.last_checked_ok,
840
variant_level=1)))
841
842
def need_approval(self, *args, **kwargs):
843
r = Client.need_approval(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastApprovalRequest"),
847
(self._datetime_to_dbus(self.last_approval_request,
848
variant_level=1)))
849
return r
850
851
def start_checker(self, *args, **kwargs):
852
old_checker = self.checker
853
if self.checker is not None:
854
old_checker_pid = self.checker.pid
855
else:
856
old_checker_pid = None
857
r = Client.start_checker(self, *args, **kwargs)
858
# Only if new checker process was started
859
if (self.checker is not None
860
and old_checker_pid != self.checker.pid):
861
# Emit D-Bus signal
862
self.CheckerStarted(self.current_checker_command)
863
self.PropertyChanged(
864
dbus.String("CheckerRunning"),
865
dbus.Boolean(True, variant_level=1))
866
return r
867
868
def stop_checker(self, *args, **kwargs):
869
old_checker = getattr(self, "checker", None)
870
r = Client.stop_checker(self, *args, **kwargs)
871
if (old_checker is not None
872
and getattr(self, "checker", None) is None):
873
self.PropertyChanged(dbus.String("CheckerRunning"),
874
dbus.Boolean(False, variant_level=1))
875
return r
876
877
def _reset_approved(self):
878
self._approved = None
879
return False
880
881
def approve(self, value=True):
882
self.send_changedstate()
883
self._approved = value
884
gobject.timeout_add(self._timedelta_to_milliseconds
885
(self.approval_duration),
886
self._reset_approved)
887
888
889
## D-Bus methods, signals & properties
890
_interface = "se.bsnet.fukt.Mandos.Client"
891
892
## Signals
479
893
480
894
# CheckerCompleted - signal
481
895
@dbus.service.signal(_interface, signature="nxs")
489
903
"D-Bus signal"
490
904
pass
491
905
492
# GetAllProperties - method
493
@dbus.service.method(_interface, out_signature="a{sv}")
494
def GetAllProperties(self):
495
"D-Bus method"
496
return dbus.Dictionary({
497
dbus.String("name"):
498
dbus.String(self.name, variant_level=1),
499
dbus.String("fingerprint"):
500
dbus.String(self.fingerprint, variant_level=1),
501
dbus.String("host"):
502
dbus.String(self.host, variant_level=1),
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
508
if self.last_enabled is not None
509
else dbus.Boolean(False, variant_level=1)),
510
dbus.String("enabled"):
511
dbus.Boolean(self.enabled, variant_level=1),
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
515
if self.last_checked_ok is not None
516
else dbus.Boolean (False, variant_level=1)),
517
dbus.String("timeout"):
518
dbus.UInt64(self.timeout_milliseconds(),
519
variant_level=1),
520
dbus.String("interval"):
521
dbus.UInt64(self.interval_milliseconds(),
522
variant_level=1),
523
dbus.String("checker"):
524
dbus.String(self.checker_command,
525
variant_level=1),
526
dbus.String("checker_running"):
527
dbus.Boolean(self.checker is not None,
528
variant_level=1),
529
dbus.String("object_path"):
530
dbus.ObjectPath(self.dbus_object_path,
531
variant_level=1)
532
}, signature="sv")
533
534
# IsStillValid - method
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
538
539
906
# PropertyChanged - signal
540
907
@dbus.service.signal(_interface, signature="sv")
541
908
def PropertyChanged(self, property, value):
542
909
"D-Bus signal"
543
910
pass
544
911
545
# SetChecker - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetChecker(self, checker):
548
"D-Bus setter method"
549
self.checker_command = checker
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"checker"),
552
dbus.String(self.checker_command,
553
variant_level=1))
554
555
# SetHost - method
556
@dbus.service.method(_interface, in_signature="s")
557
def SetHost(self, host):
558
"D-Bus setter method"
559
self.host = host
560
# Emit D-Bus signal
561
self.PropertyChanged(dbus.String(u"host"),
562
dbus.String(self.host, variant_level=1))
563
564
# SetInterval - method
565
@dbus.service.method(_interface, in_signature="t")
566
def SetInterval(self, milliseconds):
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
# Emit D-Bus signal
569
self.PropertyChanged(dbus.String(u"interval"),
570
(dbus.UInt64(self.interval_milliseconds(),
571
variant_level=1)))
572
573
# SetSecret - method
574
@dbus.service.method(_interface, in_signature="ay",
575
byte_arrays=True)
576
def SetSecret(self, secret):
577
"D-Bus setter method"
578
self.secret = str(secret)
579
580
# SetTimeout - method
581
@dbus.service.method(_interface, in_signature="t")
582
def SetTimeout(self, milliseconds):
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
# Emit D-Bus signal
585
self.PropertyChanged(dbus.String(u"timeout"),
586
(dbus.UInt64(self.timeout_milliseconds(),
587
variant_level=1)))
912
# GotSecret - signal
913
@dbus.service.signal(_interface)
914
def GotSecret(self):
915
"""D-Bus signal
916
Is sent after a successful transfer of secret from the Mandos
917
server to mandos-client
918
"""
919
pass
920
921
# Rejected - signal
922
@dbus.service.signal(_interface, signature="s")
923
def Rejected(self, reason):
924
"D-Bus signal"
925
pass
926
927
# NeedApproval - signal
928
@dbus.service.signal(_interface, signature="tb")
929
def NeedApproval(self, timeout, default):
930
"D-Bus signal"
931
return self.need_approval()
932
933
## Methods
934
935
# Approve - method
936
@dbus.service.method(_interface, in_signature="b")
937
def Approve(self, value):
938
self.approve(value)
939
940
# CheckedOK - method
941
@dbus.service.method(_interface)
942
def CheckedOK(self):
943
self.checked_ok()
588
944
589
945
# Enable - method
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
946
@dbus.service.method(_interface)
947
def Enable(self):
948
"D-Bus method"
949
self.enable()
592
950
593
951
# StartChecker - method
594
952
@dbus.service.method(_interface)
603
961
self.disable()
604
962
605
963
# StopChecker - method
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
964
@dbus.service.method(_interface)
965
def StopChecker(self):
966
self.stop_checker()
967
968
## Properties
969
970
# ApprovalPending - property
971
@dbus_service_property(_interface, signature="b", access="read")
972
def ApprovalPending_dbus_property(self):
973
return dbus.Boolean(bool(self.approvals_pending))
974
975
# ApprovedByDefault - property
976
@dbus_service_property(_interface, signature="b",
977
access="readwrite")
978
def ApprovedByDefault_dbus_property(self, value=None):
979
if value is None: # get
980
return dbus.Boolean(self.approved_by_default)
981
self.approved_by_default = bool(value)
982
# Emit D-Bus signal
983
self.PropertyChanged(dbus.String("ApprovedByDefault"),
984
dbus.Boolean(value, variant_level=1))
985
986
# ApprovalDelay - property
987
@dbus_service_property(_interface, signature="t",
988
access="readwrite")
989
def ApprovalDelay_dbus_property(self, value=None):
990
if value is None: # get
991
return dbus.UInt64(self.approval_delay_milliseconds())
992
self.approval_delay = datetime.timedelta(0, 0, 0, value)
993
# Emit D-Bus signal
994
self.PropertyChanged(dbus.String("ApprovalDelay"),
995
dbus.UInt64(value, variant_level=1))
996
997
# ApprovalDuration - property
998
@dbus_service_property(_interface, signature="t",
999
access="readwrite")
1000
def ApprovalDuration_dbus_property(self, value=None):
1001
if value is None: # get
1002
return dbus.UInt64(self._timedelta_to_milliseconds(
1003
self.approval_duration))
1004
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1005
# Emit D-Bus signal
1006
self.PropertyChanged(dbus.String("ApprovalDuration"),
1007
dbus.UInt64(value, variant_level=1))
1008
1009
# Name - property
1010
@dbus_service_property(_interface, signature="s", access="read")
1011
def Name_dbus_property(self):
1012
return dbus.String(self.name)
1013
1014
# Fingerprint - property
1015
@dbus_service_property(_interface, signature="s", access="read")
1016
def Fingerprint_dbus_property(self):
1017
return dbus.String(self.fingerprint)
1018
1019
# Host - property
1020
@dbus_service_property(_interface, signature="s",
1021
access="readwrite")
1022
def Host_dbus_property(self, value=None):
1023
if value is None: # get
1024
return dbus.String(self.host)
1025
self.host = value
1026
# Emit D-Bus signal
1027
self.PropertyChanged(dbus.String("Host"),
1028
dbus.String(value, variant_level=1))
1029
1030
# Created - property
1031
@dbus_service_property(_interface, signature="s", access="read")
1032
def Created_dbus_property(self):
1033
return dbus.String(self._datetime_to_dbus(self.created))
1034
1035
# LastEnabled - property
1036
@dbus_service_property(_interface, signature="s", access="read")
1037
def LastEnabled_dbus_property(self):
1038
if self.last_enabled is None:
1039
return dbus.String("")
1040
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1041
1042
# Enabled - property
1043
@dbus_service_property(_interface, signature="b",
1044
access="readwrite")
1045
def Enabled_dbus_property(self, value=None):
1046
if value is None: # get
1047
return dbus.Boolean(self.enabled)
1048
if value:
1049
self.enable()
1050
else:
1051
self.disable()
1052
1053
# LastCheckedOK - property
1054
@dbus_service_property(_interface, signature="s",
1055
access="readwrite")
1056
def LastCheckedOK_dbus_property(self, value=None):
1057
if value is not None:
1058
self.checked_ok()
1059
return
1060
if self.last_checked_ok is None:
1061
return dbus.String("")
1062
return dbus.String(self._datetime_to_dbus(self
1063
.last_checked_ok))
1064
1065
# LastApprovalRequest - property
1066
@dbus_service_property(_interface, signature="s", access="read")
1067
def LastApprovalRequest_dbus_property(self):
1068
if self.last_approval_request is None:
1069
return dbus.String("")
1070
return dbus.String(self.
1071
_datetime_to_dbus(self
1072
.last_approval_request))
1073
1074
# Timeout - property
1075
@dbus_service_property(_interface, signature="t",
1076
access="readwrite")
1077
def Timeout_dbus_property(self, value=None):
1078
if value is None: # get
1079
return dbus.UInt64(self.timeout_milliseconds())
1080
self.timeout = datetime.timedelta(0, 0, 0, value)
1081
# Emit D-Bus signal
1082
self.PropertyChanged(dbus.String("Timeout"),
1083
dbus.UInt64(value, variant_level=1))
1084
if getattr(self, "disable_initiator_tag", None) is None:
1085
return
1086
# Reschedule timeout
1087
gobject.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
1089
time_to_die = (self.
1090
_timedelta_to_milliseconds((self
1091
.last_checked_ok
1092
+ self.timeout)
1093
- datetime.datetime
1094
.utcnow()))
1095
if time_to_die <= 0:
1096
# The timeout has passed
1097
self.disable()
1098
else:
1099
self.disable_initiator_tag = (gobject.timeout_add
1100
(time_to_die, self.disable))
1101
1102
# Interval - property
1103
@dbus_service_property(_interface, signature="t",
1104
access="readwrite")
1105
def Interval_dbus_property(self, value=None):
1106
if value is None: # get
1107
return dbus.UInt64(self.interval_milliseconds())
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Interval"),
1111
dbus.UInt64(value, variant_level=1))
1112
if getattr(self, "checker_initiator_tag", None) is None:
1113
return
1114
# Reschedule checker run
1115
gobject.source_remove(self.checker_initiator_tag)
1116
self.checker_initiator_tag = (gobject.timeout_add
1117
(value, self.start_checker))
1118
self.start_checker() # Start one now, too
1119
1120
# Checker - property
1121
@dbus_service_property(_interface, signature="s",
1122
access="readwrite")
1123
def Checker_dbus_property(self, value=None):
1124
if value is None: # get
1125
return dbus.String(self.checker_command)
1126
self.checker_command = value
1127
# Emit D-Bus signal
1128
self.PropertyChanged(dbus.String("Checker"),
1129
dbus.String(self.checker_command,
1130
variant_level=1))
1131
1132
# CheckerRunning - property
1133
@dbus_service_property(_interface, signature="b",
1134
access="readwrite")
1135
def CheckerRunning_dbus_property(self, value=None):
1136
if value is None: # get
1137
return dbus.Boolean(self.checker is not None)
1138
if value:
1139
self.start_checker()
1140
else:
1141
self.stop_checker()
1142
1143
# ObjectPath - property
1144
@dbus_service_property(_interface, signature="o", access="read")
1145
def ObjectPath_dbus_property(self):
1146
return self.dbus_object_path # is already a dbus.ObjectPath
1147
1148
# Secret = property
1149
@dbus_service_property(_interface, signature="ay",
1150
access="write", byte_arrays=True)
1151
def Secret_dbus_property(self, value):
1152
self.secret = str(value)
608
1153
609
1154
del _interface
610
1155
611
1156
612
def peer_certificate(session):
613
"Return the peer's OpenPGP certificate as a bytestring"
614
# If not an OpenPGP certificate...
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
618
# ...do the normal thing
619
return session.peer_certificate
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
627
if list_size.value == 0:
628
return None
629
cert = cert_list[0]
630
return ctypes.string_at(cert.data, cert.size)
631
632
633
def fingerprint(openpgp):
634
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
641
# New empty GnuTLS certificate
642
crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
(gnutls.library.functions
644
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
645
# Import the OpenPGP public key into the certificate
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
650
# Verify the self signature in the key
651
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
if crtverify.value != 0:
655
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
raise gnutls.errors.CertificateSecurityError("Verify failed")
657
# New buffer for the fingerprint
658
buf = ctypes.create_string_buffer(20)
659
buf_len = ctypes.c_size_t()
660
# Get the fingerprint from the certificate into the buffer
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
664
# Deinit the certificate
665
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
# Convert the buffer to a Python bytestring
667
fpr = ctypes.string_at(buf, buf_len.value)
668
# Convert the bytestring to hexadecimal notation
669
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
return hex_fpr
671
672
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
674
"""A TCP request handler class.
675
Instantiated by IPv6_TCPServer for each request to handle it.
1157
class ProxyClient(object):
1158
def __init__(self, child_pipe, fpr, address):
1159
self._pipe = child_pipe
1160
self._pipe.send(('init', fpr, address))
1161
if not self._pipe.recv():
1162
raise KeyError()
1163
1164
def __getattribute__(self, name):
1165
if(name == '_pipe'):
1166
return super(ProxyClient, self).__getattribute__(name)
1167
self._pipe.send(('getattr', name))
1168
data = self._pipe.recv()
1169
if data[0] == 'data':
1170
return data[1]
1171
if data[0] == 'function':
1172
def func(*args, **kwargs):
1173
self._pipe.send(('funcall', name, args, kwargs))
1174
return self._pipe.recv()[1]
1175
return func
1176
1177
def __setattr__(self, name, value):
1178
if(name == '_pipe'):
1179
return super(ProxyClient, self).__setattr__(name, value)
1180
self._pipe.send(('setattr', name, value))
1181
1182
1183
class ClientHandler(socketserver.BaseRequestHandler, object):
1184
"""A class to handle client connections.
1185
1186
Instantiated once for each connection to handle it.
676
1187
Note: This will run in its own forked process."""
677
1188
678
1189
def handle(self):
679
logger.info(u"TCP connection from: %s",
680
unicode(self.client_address))
681
session = (gnutls.connection
682
.ClientSession(self.request,
683
gnutls.connection
684
.X509Credentials()))
685
686
line = self.request.makefile().readline()
687
logger.debug(u"Protocol version: %r", line)
688
try:
689
if int(line.strip().split()[0]) > 1:
690
raise RuntimeError
691
except (ValueError, IndexError, RuntimeError), error:
692
logger.error(u"Unknown protocol version: %s", error)
693
return
694
695
# Note: gnutls.connection.X509Credentials is really a generic
696
# GnuTLS certificate credentials object so long as no X.509
697
# keys are added to it. Therefore, we can use it here despite
698
# using OpenPGP certificates.
699
700
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
# "+DHE-DSS"))
703
# Use a fallback default, since this MUST be set.
704
priority = self.server.settings.get("priority", "NORMAL")
705
(gnutls.library.functions
706
.gnutls_priority_set_direct(session._c_object,
707
priority, None))
708
709
try:
710
session.handshake()
711
except gnutls.errors.GNUTLSError, error:
712
logger.warning(u"Handshake failed: %s", error)
713
# Do not run session.bye() here: the session is not
714
# established. Just abandon the request.
715
return
716
logger.debug(u"Handshake succeeded")
717
try:
718
fpr = fingerprint(peer_certificate(session))
719
except (TypeError, gnutls.errors.GNUTLSError), error:
720
logger.warning(u"Bad certificate: %s", error)
721
session.bye()
722
return
723
logger.debug(u"Fingerprint: %s", fpr)
724
725
for c in self.server.clients:
726
if c.fingerprint == fpr:
727
client = c
728
break
729
else:
730
logger.warning(u"Client not found for fingerprint: %s",
731
fpr)
732
session.bye()
733
return
734
# Have to check if client.still_valid(), since it is possible
735
# that the client timed out while establishing the GnuTLS
736
# session.
737
if not client.still_valid():
738
logger.warning(u"Client %(name)s is invalid",
739
vars(client))
740
session.bye()
741
return
742
## This won't work here, since we're in a fork.
743
# client.checked_ok()
744
sent_size = 0
745
while sent_size < len(client.secret):
746
sent = session.send(client.secret[sent_size:])
747
logger.debug(u"Sent: %d, remaining: %d",
748
sent, len(client.secret)
749
- (sent_size + sent))
750
sent_size += sent
751
session.bye()
752
753
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
SocketServer.TCPServer, object):
1190
with contextlib.closing(self.server.child_pipe) as child_pipe:
1191
logger.info("TCP connection from: %s",
1192
unicode(self.client_address))
1193
logger.debug("Pipe FD: %d",
1194
self.server.child_pipe.fileno())
1195
1196
session = (gnutls.connection
1197
.ClientSession(self.request,
1198
gnutls.connection
1199
.X509Credentials()))
1200
1201
# Note: gnutls.connection.X509Credentials is really a
1202
# generic GnuTLS certificate credentials object so long as
1203
# no X.509 keys are added to it. Therefore, we can use it
1204
# here despite using OpenPGP certificates.
1205
1206
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1207
# "+AES-256-CBC", "+SHA1",
1208
# "+COMP-NULL", "+CTYPE-OPENPGP",
1209
# "+DHE-DSS"))
1210
# Use a fallback default, since this MUST be set.
1211
priority = self.server.gnutls_priority
1212
if priority is None:
1213
priority = "NORMAL"
1214
(gnutls.library.functions
1215
.gnutls_priority_set_direct(session._c_object,
1216
priority, None))
1217
1218
# Start communication using the Mandos protocol
1219
# Get protocol number
1220
line = self.request.makefile().readline()
1221
logger.debug("Protocol version: %r", line)
1222
try:
1223
if int(line.strip().split()[0]) > 1:
1224
raise RuntimeError
1225
except (ValueError, IndexError, RuntimeError) as error:
1226
logger.error("Unknown protocol version: %s", error)
1227
return
1228
1229
# Start GnuTLS connection
1230
try:
1231
session.handshake()
1232
except gnutls.errors.GNUTLSError as error:
1233
logger.warning("Handshake failed: %s", error)
1234
# Do not run session.bye() here: the session is not
1235
# established. Just abandon the request.
1236
return
1237
logger.debug("Handshake succeeded")
1238
1239
approval_required = False
1240
try:
1241
try:
1242
fpr = self.fingerprint(self.peer_certificate
1243
(session))
1244
except (TypeError,
1245
gnutls.errors.GNUTLSError) as error:
1246
logger.warning("Bad certificate: %s", error)
1247
return
1248
logger.debug("Fingerprint: %s", fpr)
1249
1250
try:
1251
client = ProxyClient(child_pipe, fpr,
1252
self.client_address)
1253
except KeyError:
1254
return
1255
1256
if client.approval_delay:
1257
delay = client.approval_delay
1258
client.approvals_pending += 1
1259
approval_required = True
1260
1261
while True:
1262
if not client.enabled:
1263
logger.warning("Client %s is disabled",
1264
client.name)
1265
if self.server.use_dbus:
1266
# Emit D-Bus signal
1267
client.Rejected("Disabled")
1268
return
1269
1270
if client._approved or not client.approval_delay:
1271
#We are approved or approval is disabled
1272
break
1273
elif client._approved is None:
1274
logger.info("Client %s needs approval",
1275
client.name)
1276
if self.server.use_dbus:
1277
# Emit D-Bus signal
1278
client.NeedApproval(
1279
client.approval_delay_milliseconds(),
1280
client.approved_by_default)
1281
else:
1282
logger.warning("Client %s was not approved",
1283
client.name)
1284
if self.server.use_dbus:
1285
# Emit D-Bus signal
1286
client.Rejected("Denied")
1287
return
1288
1289
#wait until timeout or approved
1290
#x = float(client._timedelta_to_milliseconds(delay))
1291
time = datetime.datetime.now()
1292
client.changedstate.acquire()
1293
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1294
client.changedstate.release()
1295
time2 = datetime.datetime.now()
1296
if (time2 - time) >= delay:
1297
if not client.approved_by_default:
1298
logger.warning("Client %s timed out while"
1299
" waiting for approval",
1300
client.name)
1301
if self.server.use_dbus:
1302
# Emit D-Bus signal
1303
client.Rejected("Approval timed out")
1304
return
1305
else:
1306
break
1307
else:
1308
delay -= time2 - time
1309
1310
sent_size = 0
1311
while sent_size < len(client.secret):
1312
try:
1313
sent = session.send(client.secret[sent_size:])
1314
except gnutls.errors.GNUTLSError as error:
1315
logger.warning("gnutls send failed")
1316
return
1317
logger.debug("Sent: %d, remaining: %d",
1318
sent, len(client.secret)
1319
- (sent_size + sent))
1320
sent_size += sent
1321
1322
logger.info("Sending secret to %s", client.name)
1323
# bump the timeout as if seen
1324
client.checked_ok()
1325
if self.server.use_dbus:
1326
# Emit D-Bus signal
1327
client.GotSecret()
1328
1329
finally:
1330
if approval_required:
1331
client.approvals_pending -= 1
1332
try:
1333
session.bye()
1334
except gnutls.errors.GNUTLSError as error:
1335
logger.warning("GnuTLS bye failed")
1336
1337
@staticmethod
1338
def peer_certificate(session):
1339
"Return the peer's OpenPGP certificate as a bytestring"
1340
# If not an OpenPGP certificate...
1341
if (gnutls.library.functions
1342
.gnutls_certificate_type_get(session._c_object)
1343
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1344
# ...do the normal thing
1345
return session.peer_certificate
1346
list_size = ctypes.c_uint(1)
1347
cert_list = (gnutls.library.functions
1348
.gnutls_certificate_get_peers
1349
(session._c_object, ctypes.byref(list_size)))
1350
if not bool(cert_list) and list_size.value != 0:
1351
raise gnutls.errors.GNUTLSError("error getting peer"
1352
" certificate")
1353
if list_size.value == 0:
1354
return None
1355
cert = cert_list[0]
1356
return ctypes.string_at(cert.data, cert.size)
1357
1358
@staticmethod
1359
def fingerprint(openpgp):
1360
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1361
# New GnuTLS "datum" with the OpenPGP public key
1362
datum = (gnutls.library.types
1363
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1364
ctypes.POINTER
1365
(ctypes.c_ubyte)),
1366
ctypes.c_uint(len(openpgp))))
1367
# New empty GnuTLS certificate
1368
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1369
(gnutls.library.functions
1370
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1371
# Import the OpenPGP public key into the certificate
1372
(gnutls.library.functions
1373
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1374
gnutls.library.constants
1375
.GNUTLS_OPENPGP_FMT_RAW))
1376
# Verify the self signature in the key
1377
crtverify = ctypes.c_uint()
1378
(gnutls.library.functions
1379
.gnutls_openpgp_crt_verify_self(crt, 0,
1380
ctypes.byref(crtverify)))
1381
if crtverify.value != 0:
1382
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1383
raise (gnutls.errors.CertificateSecurityError
1384
("Verify failed"))
1385
# New buffer for the fingerprint
1386
buf = ctypes.create_string_buffer(20)
1387
buf_len = ctypes.c_size_t()
1388
# Get the fingerprint from the certificate into the buffer
1389
(gnutls.library.functions
1390
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1391
ctypes.byref(buf_len)))
1392
# Deinit the certificate
1393
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1394
# Convert the buffer to a Python bytestring
1395
fpr = ctypes.string_at(buf, buf_len.value)
1396
# Convert the bytestring to hexadecimal notation
1397
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1398
return hex_fpr
1399
1400
1401
class MultiprocessingMixIn(object):
1402
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1403
def sub_process_main(self, request, address):
1404
try:
1405
self.finish_request(request, address)
1406
except:
1407
self.handle_error(request, address)
1408
self.close_request(request)
1409
1410
def process_request(self, request, address):
1411
"""Start a new process to process the request."""
1412
multiprocessing.Process(target = self.sub_process_main,
1413
args = (request, address)).start()
1414
1415
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1416
""" adds a pipe to the MixIn """
1417
def process_request(self, request, client_address):
1418
"""Overrides and wraps the original process_request().
1419
1420
This function creates a new pipe in self.pipe
1421
"""
1422
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1423
1424
super(MultiprocessingMixInWithPipe,
1425
self).process_request(request, client_address)
1426
self.child_pipe.close()
1427
self.add_pipe(parent_pipe)
1428
1429
def add_pipe(self, parent_pipe):
1430
"""Dummy function; override as necessary"""
1431
raise NotImplementedError
1432
1433
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1434
socketserver.TCPServer, object):
756
1435
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1436
757
1437
Attributes:
758
settings: Server settings
759
clients: Set() of Client objects
760
1438
enabled: Boolean; whether this server is activated yet
1439
interface: None or a network interface name (string)
1440
use_ipv6: Boolean; to use IPv6 or not
761
1441
"""
762
address_family = socket.AF_INET6
763
def __init__(self, *args, **kwargs):
764
if "settings" in kwargs:
765
self.settings = kwargs["settings"]
766
del kwargs["settings"]
767
if "clients" in kwargs:
768
self.clients = kwargs["clients"]
769
del kwargs["clients"]
770
if "use_ipv6" in kwargs:
771
if not kwargs["use_ipv6"]:
772
self.address_family = socket.AF_INET
773
del kwargs["use_ipv6"]
774
self.enabled = False
775
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1442
def __init__(self, server_address, RequestHandlerClass,
1443
interface=None, use_ipv6=True):
1444
self.interface = interface
1445
if use_ipv6:
1446
self.address_family = socket.AF_INET6
1447
socketserver.TCPServer.__init__(self, server_address,
1448
RequestHandlerClass)
776
1449
def server_bind(self):
777
1450
"""This overrides the normal server_bind() function
778
1451
to bind to an interface if one was specified, and also NOT to
779
1452
bind to an address or port if they were not specified."""
780
if self.settings["interface"]:
781
# 25 is from /usr/include/asm-i486/socket.h
782
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
783
try:
784
self.socket.setsockopt(socket.SOL_SOCKET,
785
SO_BINDTODEVICE,
786
self.settings["interface"])
787
except socket.error, error:
788
if error[0] == errno.EPERM:
789
logger.error(u"No permission to"
790
u" bind to interface %s",
791
self.settings["interface"])
792
else:
793
raise
1453
if self.interface is not None:
1454
if SO_BINDTODEVICE is None:
1455
logger.error("SO_BINDTODEVICE does not exist;"
1456
" cannot bind to interface %s",
1457
self.interface)
1458
else:
1459
try:
1460
self.socket.setsockopt(socket.SOL_SOCKET,
1461
SO_BINDTODEVICE,
1462
str(self.interface
1463
+ '\0'))
1464
except socket.error as error:
1465
if error[0] == errno.EPERM:
1466
logger.error("No permission to"
1467
" bind to interface %s",
1468
self.interface)
1469
elif error[0] == errno.ENOPROTOOPT:
1470
logger.error("SO_BINDTODEVICE not available;"
1471
" cannot bind to interface %s",
1472
self.interface)
1473
else:
1474
raise
794
1475
# Only bind(2) the socket if we really need to.
795
1476
if self.server_address[0] or self.server_address[1]:
796
1477
if not self.server_address[0]:
803
1484
elif not self.server_address[1]:
804
1485
self.server_address = (self.server_address[0],
805
1486
0)
806
# if self.settings["interface"]:
1487
# if self.interface:
807
1488
# self.server_address = (self.server_address[0],
808
1489
# 0, # port
809
1490
# 0, # flowinfo
810
1491
# if_nametoindex
811
# (self.settings
812
# ["interface"]))
813
return super(IPv6_TCPServer, self).server_bind()
1492
# (self.interface))
1493
return socketserver.TCPServer.server_bind(self)
1494
1495
1496
class MandosServer(IPv6_TCPServer):
1497
"""Mandos server.
1498
1499
Attributes:
1500
clients: set of Client objects
1501
gnutls_priority GnuTLS priority string
1502
use_dbus: Boolean; to emit D-Bus signals or not
1503
1504
Assumes a gobject.MainLoop event loop.
1505
"""
1506
def __init__(self, server_address, RequestHandlerClass,
1507
interface=None, use_ipv6=True, clients=None,
1508
gnutls_priority=None, use_dbus=True):
1509
self.enabled = False
1510
self.clients = clients
1511
if self.clients is None:
1512
self.clients = set()
1513
self.use_dbus = use_dbus
1514
self.gnutls_priority = gnutls_priority
1515
IPv6_TCPServer.__init__(self, server_address,
1516
RequestHandlerClass,
1517
interface = interface,
1518
use_ipv6 = use_ipv6)
814
1519
def server_activate(self):
815
1520
if self.enabled:
816
return super(IPv6_TCPServer, self).server_activate()
1521
return socketserver.TCPServer.server_activate(self)
817
1522
def enable(self):
818
1523
self.enabled = True
1524
def add_pipe(self, parent_pipe):
1525
# Call "handle_ipc" for both data and EOF events
1526
gobject.io_add_watch(parent_pipe.fileno(),
1527
gobject.IO_IN | gobject.IO_HUP,
1528
functools.partial(self.handle_ipc,
1529
parent_pipe = parent_pipe))
1530
1531
def handle_ipc(self, source, condition, parent_pipe=None,
1532
client_object=None):
1533
condition_names = {
1534
gobject.IO_IN: "IN", # There is data to read.
1535
gobject.IO_OUT: "OUT", # Data can be written (without
1536
# blocking).
1537
gobject.IO_PRI: "PRI", # There is urgent data to read.
1538
gobject.IO_ERR: "ERR", # Error condition.
1539
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1540
# broken, usually for pipes and
1541
# sockets).
1542
}
1543
conditions_string = ' | '.join(name
1544
for cond, name in
1545
condition_names.iteritems()
1546
if cond & condition)
1547
# error or the other end of multiprocessing.Pipe has closed
1548
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1549
return False
1550
1551
# Read a request from the child
1552
request = parent_pipe.recv()
1553
command = request[0]
1554
1555
if command == 'init':
1556
fpr = request[1]
1557
address = request[2]
1558
1559
for c in self.clients:
1560
if c.fingerprint == fpr:
1561
client = c
1562
break
1563
else:
1564
logger.warning("Client not found for fingerprint: %s, ad"
1565
"dress: %s", fpr, address)
1566
if self.use_dbus:
1567
# Emit D-Bus signal
1568
mandos_dbus_service.ClientNotFound(fpr, address[0])
1569
parent_pipe.send(False)
1570
return False
1571
1572
gobject.io_add_watch(parent_pipe.fileno(),
1573
gobject.IO_IN | gobject.IO_HUP,
1574
functools.partial(self.handle_ipc,
1575
parent_pipe = parent_pipe,
1576
client_object = client))
1577
parent_pipe.send(True)
1578
# remove the old hook in favor of the new above hook on same fileno
1579
return False
1580
if command == 'funcall':
1581
funcname = request[1]
1582
args = request[2]
1583
kwargs = request[3]
1584
1585
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1586
1587
if command == 'getattr':
1588
attrname = request[1]
1589
if callable(client_object.__getattribute__(attrname)):
1590
parent_pipe.send(('function',))
1591
else:
1592
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1593
1594
if command == 'setattr':
1595
attrname = request[1]
1596
value = request[2]
1597
setattr(client_object, attrname, value)
1598
1599
return True
819
1600
820
1601
821
1602
def string_to_delta(interval):
829
1610
datetime.timedelta(0, 3600)
830
1611
>>> string_to_delta('24h')
831
1612
datetime.timedelta(1)
832
>>> string_to_delta(u'1w')
1613
>>> string_to_delta('1w')
833
1614
datetime.timedelta(7)
834
1615
>>> string_to_delta('5m 30s')
835
1616
datetime.timedelta(0, 330)
839
1620
try:
840
1621
suffix = unicode(s[-1])
841
1622
value = int(s[:-1])
842
if suffix == u"d":
1623
if suffix == "d":
843
1624
delta = datetime.timedelta(value)
844
elif suffix == u"s":
1625
elif suffix == "s":
845
1626
delta = datetime.timedelta(0, value)
846
elif suffix == u"m":
1627
elif suffix == "m":
847
1628
delta = datetime.timedelta(0, 0, 0, 0, value)
848
elif suffix == u"h":
1629
elif suffix == "h":
849
1630
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
850
elif suffix == u"w":
1631
elif suffix == "w":
851
1632
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
852
1633
else:
853
raise ValueError
854
except (ValueError, IndexError):
855
raise ValueError
1634
raise ValueError("Unknown suffix %r" % suffix)
1635
except (ValueError, IndexError) as e:
1636
raise ValueError(*(e.args))
856
1637
timevalue += delta
857
1638
return timevalue
858
1639
859
1640
860
def server_state_changed(state):
861
"""Derived from the Avahi example code"""
862
if state == avahi.SERVER_COLLISION:
863
logger.error(u"Zeroconf server name collision")
864
service.remove()
865
elif state == avahi.SERVER_RUNNING:
866
service.add()
867
868
869
def entry_group_state_changed(state, error):
870
"""Derived from the Avahi example code"""
871
logger.debug(u"Avahi state change: %i", state)
872
873
if state == avahi.ENTRY_GROUP_ESTABLISHED:
874
logger.debug(u"Zeroconf service established.")
875
elif state == avahi.ENTRY_GROUP_COLLISION:
876
logger.warning(u"Zeroconf service name collision.")
877
service.rename()
878
elif state == avahi.ENTRY_GROUP_FAILURE:
879
logger.critical(u"Avahi: Error in group state changed %s",
880
unicode(error))
881
raise AvahiGroupError(u"State changed: %s" % unicode(error))
882
883
1641
def if_nametoindex(interface):
884
"""Call the C function if_nametoindex(), or equivalent"""
1642
"""Call the C function if_nametoindex(), or equivalent
1643
1644
Note: This function cannot accept a unicode string."""
885
1645
global if_nametoindex
886
1646
try:
887
1647
if_nametoindex = (ctypes.cdll.LoadLibrary
888
1648
(ctypes.util.find_library("c"))
889
1649
.if_nametoindex)
890
1650
except (OSError, AttributeError):
891
if "struct" not in sys.modules:
892
import struct
893
if "fcntl" not in sys.modules:
894
import fcntl
1651
logger.warning("Doing if_nametoindex the hard way")
895
1652
def if_nametoindex(interface):
896
1653
"Get an interface index the hard way, i.e. using fcntl()"
897
1654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
898
with closing(socket.socket()) as s:
1655
with contextlib.closing(socket.socket()) as s:
899
1656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
struct.pack("16s16x", interface))
901
interface_index = struct.unpack("I", ifreq[16:20])[0]
1657
struct.pack(str("16s16x"),
1658
interface))
1659
interface_index = struct.unpack(str("I"),
1660
ifreq[16:20])[0]
902
1661
return interface_index
903
1662
return if_nametoindex(interface)
904
1663
905
1664
906
1665
def daemon(nochdir = False, noclose = False):
907
1666
"""See daemon(3). Standard BSD Unix function.
1667
908
1668
This should really exist as os.daemon, but it doesn't (yet)."""
909
1669
if os.fork():
910
1670
sys.exit()
918
1678
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
919
1679
if not stat.S_ISCHR(os.fstat(null).st_mode):
920
1680
raise OSError(errno.ENODEV,
921
"/dev/null not a character device")
1681
"%s not a character device"
1682
% os.path.devnull)
922
1683
os.dup2(null, sys.stdin.fileno())
923
1684
os.dup2(null, sys.stdout.fileno())
924
1685
os.dup2(null, sys.stderr.fileno())
927
1688
928
1689
929
1690
def main():
930
parser = optparse.OptionParser(version = "%%prog %s" % version)
931
parser.add_option("-i", "--interface", type="string",
932
metavar="IF", help="Bind to interface IF")
933
parser.add_option("-a", "--address", type="string",
934
help="Address to listen for requests on")
935
parser.add_option("-p", "--port", type="int",
936
help="Port number to receive requests on")
937
parser.add_option("--check", action="store_true",
938
help="Run self-test")
939
parser.add_option("--debug", action="store_true",
940
help="Debug mode; run in foreground and log to"
941
" terminal")
942
parser.add_option("--priority", type="string", help="GnuTLS"
943
" priority string (see GnuTLS documentation)")
944
parser.add_option("--servicename", type="string", metavar="NAME",
945
help="Zeroconf service name")
946
parser.add_option("--configdir", type="string",
947
default="/etc/mandos", metavar="DIR",
948
help="Directory to search for configuration"
949
" files")
950
parser.add_option("--no-dbus", action="store_false",
951
dest="use_dbus",
952
help="Do not provide D-Bus system bus"
953
" interface")
954
parser.add_option("--no-ipv6", action="store_false",
955
dest="use_ipv6", help="Do not use IPv6")
956
options = parser.parse_args()[0]
1691
1692
##################################################################
1693
# Parsing of options, both command line and config file
1694
1695
parser = argparse.ArgumentParser()
1696
parser.add_argument("-v", "--version", action="version",
1697
version = "%%(prog)s %s" % version,
1698
help="show version number and exit")
1699
parser.add_argument("-i", "--interface", metavar="IF",
1700
help="Bind to interface IF")
1701
parser.add_argument("-a", "--address",
1702
help="Address to listen for requests on")
1703
parser.add_argument("-p", "--port", type=int,
1704
help="Port number to receive requests on")
1705
parser.add_argument("--check", action="store_true",
1706
help="Run self-test")
1707
parser.add_argument("--debug", action="store_true",
1708
help="Debug mode; run in foreground and log"
1709
" to terminal")
1710
parser.add_argument("--debuglevel", metavar="LEVEL",
1711
help="Debug level for stdout output")
1712
parser.add_argument("--priority", help="GnuTLS"
1713
" priority string (see GnuTLS documentation)")
1714
parser.add_argument("--servicename",
1715
metavar="NAME", help="Zeroconf service name")
1716
parser.add_argument("--configdir",
1717
default="/etc/mandos", metavar="DIR",
1718
help="Directory to search for configuration"
1719
" files")
1720
parser.add_argument("--no-dbus", action="store_false",
1721
dest="use_dbus", help="Do not provide D-Bus"
1722
" system bus interface")
1723
parser.add_argument("--no-ipv6", action="store_false",
1724
dest="use_ipv6", help="Do not use IPv6")
1725
options = parser.parse_args()
957
1726
958
1727
if options.check:
959
1728
import doctest
970
1739
"servicename": "Mandos",
971
1740
"use_dbus": "True",
972
1741
"use_ipv6": "True",
1742
"debuglevel": "",
973
1743
}
974
1744
975
1745
# Parse config file for server-global settings
976
server_config = ConfigParser.SafeConfigParser(server_defaults)
1746
server_config = configparser.SafeConfigParser(server_defaults)
977
1747
del server_defaults
978
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1748
server_config.read(os.path.join(options.configdir,
1749
"mandos.conf"))
979
1750
# Convert the SafeConfigParser object to a dict
980
1751
server_settings = server_config.defaults()
981
1752
# Use the appropriate methods on the non-string config options
982
server_settings["debug"] = server_config.getboolean("DEFAULT",
983
"debug")
984
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
985
"use_dbus")
986
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
987
"use_ipv6")
1753
for option in ("debug", "use_dbus", "use_ipv6"):
1754
server_settings[option] = server_config.getboolean("DEFAULT",
1755
option)
988
1756
if server_settings["port"]:
989
1757
server_settings["port"] = server_config.getint("DEFAULT",
990
1758
"port")
994
1762
# options, if set.
995
1763
for option in ("interface", "address", "port", "debug",
996
1764
"priority", "servicename", "configdir",
997
"use_dbus", "use_ipv6"):
1765
"use_dbus", "use_ipv6", "debuglevel"):
998
1766
value = getattr(options, option)
999
1767
if value is not None:
1000
1768
server_settings[option] = value
1001
1769
del options
1770
# Force all strings to be unicode
1771
for option in server_settings.keys():
1772
if type(server_settings[option]) is str:
1773
server_settings[option] = unicode(server_settings[option])
1002
1774
# Now we have our good server settings in "server_settings"
1003
1775
1776
##################################################################
1777
1004
1778
# For convenience
1005
1779
debug = server_settings["debug"]
1780
debuglevel = server_settings["debuglevel"]
1006
1781
use_dbus = server_settings["use_dbus"]
1007
1782
use_ipv6 = server_settings["use_ipv6"]
1008
1009
if not debug:
1010
syslogger.setLevel(logging.WARNING)
1011
console.setLevel(logging.WARNING)
1012
1783
1013
1784
if server_settings["servicename"] != "Mandos":
1014
1785
syslogger.setFormatter(logging.Formatter
1015
('Mandos (%s): %%(levelname)s:'
1016
' %%(message)s'
1786
('Mandos (%s) [%%(process)d]:'
1787
' %%(levelname)s: %%(message)s'
1017
1788
% server_settings["servicename"]))
1018
1789
1019
1790
# Parse config file with clients
1021
1792
"interval": "5m",
1022
1793
"checker": "fping -q -- %%(host)s",
1023
1794
"host": "",
1795
"approval_delay": "0s",
1796
"approval_duration": "1s",
1024
1797
}
1025
client_config = ConfigParser.SafeConfigParser(client_defaults)
1798
client_config = configparser.SafeConfigParser(client_defaults)
1026
1799
client_config.read(os.path.join(server_settings["configdir"],
1027
1800
"clients.conf"))
1028
1801
1029
clients = Set()
1030
tcp_server = IPv6_TCPServer((server_settings["address"],
1031
server_settings["port"]),
1032
TCP_handler,
1033
settings=server_settings,
1034
clients=clients, use_ipv6=use_ipv6)
1035
pidfilename = "/var/run/mandos.pid"
1036
try:
1037
pidfile = open(pidfilename, "w")
1038
except IOError:
1039
logger.error("Could not open file %r", pidfilename)
1802
global mandos_dbus_service
1803
mandos_dbus_service = None
1804
1805
tcp_server = MandosServer((server_settings["address"],
1806
server_settings["port"]),
1807
ClientHandler,
1808
interface=(server_settings["interface"]
1809
or None),
1810
use_ipv6=use_ipv6,
1811
gnutls_priority=
1812
server_settings["priority"],
1813
use_dbus=use_dbus)
1814
if not debug:
1815
pidfilename = "/var/run/mandos.pid"
1816
try:
1817
pidfile = open(pidfilename, "w")
1818
except IOError:
1819
logger.error("Could not open file %r", pidfilename)
1040
1820
1041
1821
try:
1042
1822
uid = pwd.getpwnam("_mandos").pw_uid
1048
1828
except KeyError:
1049
1829
try:
1050
1830
uid = pwd.getpwnam("nobody").pw_uid
1051
gid = pwd.getpwnam("nogroup").pw_gid
1831
gid = pwd.getpwnam("nobody").pw_gid
1052
1832
except KeyError:
1053
1833
uid = 65534
1054
1834
gid = 65534
1055
1835
try:
1056
1836
os.setgid(gid)
1057
1837
os.setuid(uid)
1058
except OSError, error:
1838
except OSError as error:
1059
1839
if error[0] != errno.EPERM:
1060
1840
raise error
1061
1841
1062
# Enable all possible GnuTLS debugging
1842
if not debug and not debuglevel:
1843
syslogger.setLevel(logging.WARNING)
1844
console.setLevel(logging.WARNING)
1845
if debuglevel:
1846
level = getattr(logging, debuglevel.upper())
1847
syslogger.setLevel(level)
1848
console.setLevel(level)
1849
1063
1850
if debug:
1851
# Enable all possible GnuTLS debugging
1852
1064
1853
# "Use a log level over 10 to enable all debugging options."
1065
1854
# - GnuTLS manual
1066
1855
gnutls.library.functions.gnutls_global_set_log_level(11)
1071
1860
1072
1861
(gnutls.library.functions
1073
1862
.gnutls_global_set_log_function(debug_gnutls))
1863
1864
# Redirect stdin so all checkers get /dev/null
1865
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1866
os.dup2(null, sys.stdin.fileno())
1867
if null > 2:
1868
os.close(null)
1869
else:
1870
# No console logging
1871
logger.removeHandler(console)
1074
1872
1075
global service
1076
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
service = AvahiService(name = server_settings["servicename"],
1078
servicetype = "_mandos._tcp",
1079
protocol = protocol)
1080
if server_settings["interface"]:
1081
service.interface = (if_nametoindex
1082
(server_settings["interface"]))
1873
# Need to fork before connecting to D-Bus
1874
if not debug:
1875
# Close all input and output, do double fork, etc.
1876
daemon()
1083
1877
1084
1878
global main_loop
1085
global bus
1086
global server
1087
1879
# From the Avahi example code
1088
1880
DBusGMainLoop(set_as_default=True )
1089
1881
main_loop = gobject.MainLoop()
1090
1882
bus = dbus.SystemBus()
1091
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
avahi.DBUS_PATH_SERVER),
1093
avahi.DBUS_INTERFACE_SERVER)
1094
1883
# End of Avahi example code
1095
1884
if use_dbus:
1096
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1097
1098
clients.update(Set(Client(name = section,
1099
config
1100
= dict(client_config.items(section)),
1101
use_dbus = use_dbus)
1102
for section in client_config.sections()))
1103
if not clients:
1104
logger.warning(u"No clients defined")
1105
1106
if debug:
1107
# Redirect stdin so all checkers get /dev/null
1108
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1109
os.dup2(null, sys.stdin.fileno())
1110
if null > 2:
1111
os.close(null)
1112
else:
1113
# No console logging
1114
logger.removeHandler(console)
1115
# Close all input and output, do double fork, etc.
1116
daemon()
1117
1118
try:
1119
pid = os.getpid()
1120
pidfile.write(str(pid) + "\n")
1121
pidfile.close()
1122
del pidfile
1123
except IOError:
1124
logger.error(u"Could not write to file %r with PID %d",
1125
pidfilename, pid)
1126
except NameError:
1127
# "pidfile" was never created
1128
pass
1129
del pidfilename
1130
1131
def cleanup():
1132
"Cleanup function; run on exit"
1133
global group
1134
# From the Avahi example code
1135
if not group is None:
1136
group.Free()
1137
group = None
1138
# End of Avahi example code
1885
try:
1886
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1887
bus, do_not_queue=True)
1888
except dbus.exceptions.NameExistsException as e:
1889
logger.error(unicode(e) + ", disabling D-Bus")
1890
use_dbus = False
1891
server_settings["use_dbus"] = False
1892
tcp_server.use_dbus = False
1893
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1894
service = AvahiService(name = server_settings["servicename"],
1895
servicetype = "_mandos._tcp",
1896
protocol = protocol, bus = bus)
1897
if server_settings["interface"]:
1898
service.interface = (if_nametoindex
1899
(str(server_settings["interface"])))
1900
1901
global multiprocessing_manager
1902
multiprocessing_manager = multiprocessing.Manager()
1903
1904
client_class = Client
1905
if use_dbus:
1906
client_class = functools.partial(ClientDBus, bus = bus)
1907
def client_config_items(config, section):
1908
special_settings = {
1909
"approved_by_default":
1910
lambda: config.getboolean(section,
1911
"approved_by_default"),
1912
}
1913
for name, value in config.items(section):
1914
try:
1915
yield (name, special_settings[name]())
1916
except KeyError:
1917
yield (name, value)
1918
1919
tcp_server.clients.update(set(
1920
client_class(name = section,
1921
config= dict(client_config_items(
1922
client_config, section)))
1923
for section in client_config.sections()))
1924
if not tcp_server.clients:
1925
logger.warning("No clients defined")
1139
1926
1140
while clients:
1141
client = clients.pop()
1142
client.disable_hook = None
1143
client.disable()
1144
1145
atexit.register(cleanup)
1146
1147
1927
if not debug:
1928
try:
1929
with pidfile:
1930
pid = os.getpid()
1931
pidfile.write(str(pid) + "\n".encode("utf-8"))
1932
del pidfile
1933
except IOError:
1934
logger.error("Could not write to file %r with PID %d",
1935
pidfilename, pid)
1936
except NameError:
1937
# "pidfile" was never created
1938
pass
1939
del pidfilename
1940
1148
1941
signal.signal(signal.SIGINT, signal.SIG_IGN)
1942
1149
1943
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1150
1944
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1151
1945
1152
1946
if use_dbus:
1153
class MandosServer(dbus.service.Object):
1947
class MandosDBusService(dbus.service.Object):
1154
1948
"""A D-Bus proxy object"""
1155
1949
def __init__(self):
1156
1950
dbus.service.Object.__init__(self, bus, "/")
1157
_interface = u"se.bsnet.fukt.Mandos"
1158
1159
@dbus.service.signal(_interface, signature="oa{sv}")
1160
def ClientAdded(self, objpath, properties):
1951
_interface = "se.bsnet.fukt.Mandos"
1952
1953
@dbus.service.signal(_interface, signature="o")
1954
def ClientAdded(self, objpath):
1955
"D-Bus signal"
1956
pass
1957
1958
@dbus.service.signal(_interface, signature="ss")
1959
def ClientNotFound(self, fingerprint, address):
1161
1960
"D-Bus signal"
1162
1961
pass
1163
1962
1169
1968
@dbus.service.method(_interface, out_signature="ao")
1170
1969
def GetAllClients(self):
1171
1970
"D-Bus method"
1172
return dbus.Array(c.dbus_object_path for c in clients)
1971
return dbus.Array(c.dbus_object_path
1972
for c in tcp_server.clients)
1173
1973
1174
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1974
@dbus.service.method(_interface,
1975
out_signature="a{oa{sv}}")
1175
1976
def GetAllClientsWithProperties(self):
1176
1977
"D-Bus method"
1177
1978
return dbus.Dictionary(
1178
((c.dbus_object_path, c.GetAllProperties())
1179
for c in clients),
1979
((c.dbus_object_path, c.GetAll(""))
1980
for c in tcp_server.clients),
1180
1981
signature="oa{sv}")
1181
1982
1182
1983
@dbus.service.method(_interface, in_signature="o")
1183
1984
def RemoveClient(self, object_path):
1184
1985
"D-Bus method"
1185
for c in clients:
1986
for c in tcp_server.clients:
1186
1987
if c.dbus_object_path == object_path:
1187
clients.remove(c)
1988
tcp_server.clients.remove(c)
1989
c.remove_from_connection()
1188
1990
# Don't signal anything except ClientRemoved
1189
c.use_dbus = False
1190
c.disable()
1991
c.disable(quiet=True)
1191
1992
# Emit D-Bus signal
1192
1993
self.ClientRemoved(object_path, c.name)
1193
1994
return
1194
raise KeyError
1995
raise KeyError(object_path)
1195
1996
1196
1997
del _interface
1197
1998
1198
mandos_server = MandosServer()
1199
1200
for client in clients:
1999
mandos_dbus_service = MandosDBusService()
2000
2001
def cleanup():
2002
"Cleanup function; run on exit"
2003
service.cleanup()
2004
2005
while tcp_server.clients:
2006
client = tcp_server.clients.pop()
2007
if use_dbus:
2008
client.remove_from_connection()
2009
client.disable_hook = None
2010
# Don't signal anything except ClientRemoved
2011
client.disable(quiet=True)
2012
if use_dbus:
2013
# Emit D-Bus signal
2014
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2015
client.name)
2016
2017
atexit.register(cleanup)
2018
2019
for client in tcp_server.clients:
1201
2020
if use_dbus:
1202
2021
# Emit D-Bus signal
1203
mandos_server.ClientAdded(client.dbus_object_path,
1204
client.GetAllProperties())
2022
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1205
2023
client.enable()
1206
2024
1207
2025
tcp_server.enable()
1210
2028
# Find out what port we got
1211
2029
service.port = tcp_server.socket.getsockname()[1]
1212
2030
if use_ipv6:
1213
logger.info(u"Now listening on address %r, port %d,"
2031
logger.info("Now listening on address %r, port %d,"
1214
2032
" flowinfo %d, scope_id %d"
1215
2033
% tcp_server.socket.getsockname())
1216
2034
else: # IPv4
1217
logger.info(u"Now listening on address %r, port %d"
2035
logger.info("Now listening on address %r, port %d"
1218
2036
% tcp_server.socket.getsockname())
1219
2037
1220
2038
#service.interface = tcp_server.socket.getsockname()[3]
1221
2039
1222
2040
try:
1223
2041
# From the Avahi example code
1224
server.connect_to_signal("StateChanged", server_state_changed)
1225
2042
try:
1226
server_state_changed(server.GetState())
1227
except dbus.exceptions.DBusException, error:
1228
logger.critical(u"DBusException: %s", error)
2043
service.activate()
2044
except dbus.exceptions.DBusException as error:
2045
logger.critical("DBusException: %s", error)
2046
cleanup()
1229
2047
sys.exit(1)
1230
2048
# End of Avahi example code
1231
2049
1234
2052
(tcp_server.handle_request
1235
2053
(*args[2:], **kwargs) or True))
1236
2054
1237
logger.debug(u"Starting main loop")
2055
logger.debug("Starting main loop")
1238
2056
main_loop.run()
1239
except AvahiError, error:
1240
logger.critical(u"AvahiError: %s", error)
2057
except AvahiError as error:
2058
logger.critical("AvahiError: %s", error)
2059
cleanup()
1241
2060
sys.exit(1)
1242
2061
except KeyboardInterrupt:
1243
2062
if debug:
1244
print >> sys.stderr
2063
print("", file=sys.stderr)
1245
2064
logger.debug("Server received KeyboardInterrupt")
1246
2065
logger.debug("Server exiting")
2066
# Must run before the D-Bus bus name gets deregistered
2067
cleanup()
1247
2068
1248
2069
if __name__ == '__main__':
1249
2070
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0