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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
73
import xml.dom.minidom
74
import inspect
68
75
69
76
try:
70
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
72
79
try:
73
80
from IN import SO_BINDTODEVICE
74
81
except ImportError:
75
# From /usr/include/asm/socket.h
76
SO_BINDTODEVICE = 25
77
78
79
version = "1.0.8"
80
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.0"
86
87
#logger = logging.getLogger('mandos')
81
88
logger = logging.Logger('mandos')
82
89
syslogger = (logging.handlers.SysLogHandler
83
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
84
address = "/dev/log"))
91
address = str("/dev/log")))
85
92
syslogger.setFormatter(logging.Formatter
86
93
('Mandos [%(process)d]: %(levelname)s:'
87
94
' %(message)s'))
89
96
90
97
console = logging.StreamHandler()
91
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
92
' %(levelname)s: %(message)s'))
99
' %(levelname)s:'
100
' %(message)s'))
93
101
logger.addHandler(console)
94
102
95
103
class AvahiError(Exception):
122
130
max_renames: integer; maximum number of renames
123
131
rename_count: integer; counter so we only rename after collisions
124
132
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
125
136
"""
126
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
127
138
servicetype = None, port = None, TXT = None,
128
139
domain = "", host = "", max_renames = 32768,
129
protocol = avahi.PROTO_UNSPEC):
140
protocol = avahi.PROTO_UNSPEC, bus = None):
130
141
self.interface = interface
131
142
self.name = name
132
143
self.type = servicetype
137
148
self.rename_count = 0
138
149
self.max_renames = max_renames
139
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
140
155
def rename(self):
141
156
"""Derived from the Avahi example code"""
142
157
if self.rename_count >= self.max_renames:
143
logger.critical(u"No suitable Zeroconf service name found"
144
u" after %i retries, exiting.",
158
logger.critical("No suitable Zeroconf service name found"
159
" after %i retries, exiting.",
145
160
self.rename_count)
146
raise AvahiServiceError(u"Too many renames")
147
self.name = server.GetAlternativeServiceName(self.name)
148
logger.info(u"Changing Zeroconf service name to %r ...",
149
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)
150
165
syslogger.setFormatter(logging.Formatter
151
166
('Mandos (%s) [%%(process)d]:'
152
167
' %%(levelname)s: %%(message)s'
153
168
% self.name))
154
169
self.remove()
155
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)
156
176
self.rename_count += 1
157
177
def remove(self):
158
178
"""Derived from the Avahi example code"""
159
if group is not None:
160
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
161
189
def add(self):
162
190
"""Derived from the Avahi example code"""
163
global group
164
if group is None:
165
group = dbus.Interface(bus.get_object
166
(avahi.DBUS_NAME,
167
server.EntryGroupNew()),
168
avahi.DBUS_INTERFACE_ENTRY_GROUP)
169
group.connect_to_signal('StateChanged',
170
entry_group_state_changed)
171
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
172
service.name, service.type)
173
group.AddService(
174
self.interface, # interface
175
self.protocol, # protocol
176
dbus.UInt32(0), # flags
177
self.name, self.type,
178
self.domain, self.host,
179
dbus.UInt16(self.port),
180
avahi.string_array_to_txt_array(self.TXT))
181
group.Commit()
182
183
# From the Avahi example code:
184
group = None # our entry group
185
# End of Avahi example code
186
187
188
def _datetime_to_dbus(dt, variant_level=0):
189
"""Convert a UTC datetime.datetime() to a D-Bus type."""
190
return dbus.String(dt.isoformat(), variant_level=variant_level)
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())
191
257
192
258
193
259
class Client(object):
194
260
"""A representation of a client host served by this server.
195
261
196
262
Attributes:
197
name: string; from the config file, used in log messages and
198
D-Bus identifiers
199
fingerprint: string (40 or 32 hexadecimal digits); used to
200
uniquely identify the client
201
secret: bytestring; sent verbatim (over TLS) to client
202
host: string; available for use by the checker command
203
created: datetime.datetime(); (UTC) object creation
204
last_enabled: datetime.datetime(); (UTC)
205
enabled: bool()
206
last_checked_ok: datetime.datetime(); (UTC) or None
207
timeout: datetime.timedelta(); How long from last_checked_ok
208
until this client is invalid
209
interval: datetime.timedelta(); How often to start a new checker
210
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
211
266
checker: subprocess.Popen(); a running checker process used
212
267
to see if the client lives.
213
268
'None' if no process is running.
214
checker_initiator_tag: a gobject event source tag, or None
215
disable_initiator_tag: - '' -
216
checker_callback_tag: - '' -
217
checker_command: string; External command which is run to check if
218
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
219
272
runtime with vars(self) as dict, so that for
220
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
221
276
current_checker_command: string; current running checker_command
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.
222
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
223
307
def timeout_milliseconds(self):
224
308
"Return the 'timeout' attribute in milliseconds"
225
return ((self.timeout.days * 24 * 60 * 60 * 1000)
226
+ (self.timeout.seconds * 1000)
227
+ (self.timeout.microseconds // 1000))
309
return self._timedelta_to_milliseconds(self.timeout)
228
310
229
311
def interval_milliseconds(self):
230
312
"Return the 'interval' attribute in milliseconds"
231
return ((self.interval.days * 24 * 60 * 60 * 1000)
232
+ (self.interval.seconds * 1000)
233
+ (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)
234
317
235
318
def __init__(self, name = None, disable_hook=None, config=None):
236
319
"""Note: the 'checker' key in 'config' sets the
239
322
self.name = name
240
323
if config is None:
241
324
config = {}
242
logger.debug(u"Creating client %r", self.name)
325
logger.debug("Creating client %r", self.name)
243
326
# Uppercase and remove spaces from fingerprint for later
244
327
# comparison purposes with return value from the fingerprint()
245
328
# function
246
329
self.fingerprint = (config["fingerprint"].upper()
247
.replace(u" ", u""))
248
logger.debug(u" Fingerprint: %s", self.fingerprint)
330
.replace(" ", ""))
331
logger.debug(" Fingerprint: %s", self.fingerprint)
249
332
if "secret" in config:
250
self.secret = config["secret"].decode(u"base64")
333
self.secret = config["secret"].decode("base64")
251
334
elif "secfile" in config:
252
with closing(open(os.path.expanduser
253
(os.path.expandvars
254
(config["secfile"])))) as secfile:
335
with open(os.path.expanduser(os.path.expandvars
336
(config["secfile"])),
337
"rb") as secfile:
255
338
self.secret = secfile.read()
256
339
else:
257
raise TypeError(u"No secret or secfile for client %s"
340
raise TypeError("No secret or secfile for client %s"
258
341
% self.name)
259
342
self.host = config.get("host", "")
260
343
self.created = datetime.datetime.utcnow()
261
344
self.enabled = False
345
self.last_approval_request = None
262
346
self.last_enabled = None
263
347
self.last_checked_ok = None
264
348
self.timeout = string_to_delta(config["timeout"])
271
355
self.checker_command = config["checker"]
272
356
self.current_checker_command = None
273
357
self.last_connect = None
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
390
# Also start a new checker *right now*.
391
self.start_checker()
290
392
291
def disable(self):
393
def disable(self, quiet=True):
292
394
"""Disable this client."""
293
395
if not getattr(self, "enabled", False):
294
396
return False
295
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)
296
401
if getattr(self, "disable_initiator_tag", False):
297
402
gobject.source_remove(self.disable_initiator_tag)
298
403
self.disable_initiator_tag = None
317
422
if os.WIFEXITED(condition):
318
423
exitstatus = os.WEXITSTATUS(condition)
319
424
if exitstatus == 0:
320
logger.info(u"Checker for %(name)s succeeded",
425
logger.info("Checker for %(name)s succeeded",
321
426
vars(self))
322
427
self.checked_ok()
323
428
else:
324
logger.info(u"Checker for %(name)s failed",
429
logger.info("Checker for %(name)s failed",
325
430
vars(self))
326
431
else:
327
logger.warning(u"Checker for %(name)s crashed?",
432
logger.warning("Checker for %(name)s crashed?",
328
433
vars(self))
329
434
330
435
def checked_ok(self):
339
444
(self.timeout_milliseconds(),
340
445
self.disable))
341
446
447
def need_approval(self):
448
self.last_approval_request = datetime.datetime.utcnow()
449
342
450
def start_checker(self):
343
451
"""Start a new checker subprocess if one is not running.
344
452
350
458
# client would inevitably timeout, since no checker would get
351
459
# a chance to run to completion. If we instead leave running
352
460
# checkers alone, the checker would have to take more time
353
# than 'timeout' for the client to be declared invalid, which
354
# is as it should be.
461
# than 'timeout' for the client to be disabled, which is as it
462
# should be.
355
463
356
464
# If a checker exists, make sure it is not a zombie
357
if self.checker is not None:
465
try:
358
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:
359
472
if pid:
360
473
logger.warning("Checker was a zombie")
361
474
gobject.source_remove(self.checker_callback_tag)
368
481
command = self.checker_command % self.host
369
482
except TypeError:
370
483
# Escape attributes for the shell
371
escaped_attrs = dict((key, re.escape(str(val)))
372
for key, val in
373
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
374
492
try:
375
493
command = self.checker_command % escaped_attrs
376
except TypeError, error:
377
logger.error(u'Could not format string "%s":'
378
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)
379
497
return True # Try again later
380
498
self.current_checker_command = command
381
499
try:
382
logger.info(u"Starting checker %r for %s",
500
logger.info("Starting checker %r for %s",
383
501
command, self.name)
384
502
# We don't need to redirect stdout and stderr, since
385
503
# in normal mode, that is already done by daemon(),
398
516
if pid:
399
517
gobject.source_remove(self.checker_callback_tag)
400
518
self.checker_callback(pid, status, command)
401
except OSError, error:
402
logger.error(u"Failed to start subprocess: %s",
519
except OSError as error:
520
logger.error("Failed to start subprocess: %s",
403
521
error)
404
522
# Re-run this periodically if run by gobject.timeout_add
405
523
return True
411
529
self.checker_callback_tag = None
412
530
if getattr(self, "checker", None) is None:
413
531
return
414
logger.debug(u"Stopping checker for %(name)s", vars(self))
532
logger.debug("Stopping checker for %(name)s", vars(self))
415
533
try:
416
534
os.kill(self.checker.pid, signal.SIGTERM)
417
#os.sleep(0.5)
535
#time.sleep(0.5)
418
536
#if self.checker.poll() is None:
419
537
# os.kill(self.checker.pid, signal.SIGKILL)
420
except OSError, error:
538
except OSError as error:
421
539
if error.errno != errno.ESRCH: # No such process
422
540
raise
423
541
self.checker = None
424
425
def still_valid(self):
426
"""Has the timeout not yet passed for this client?"""
427
if not getattr(self, "enabled", False):
428
return False
429
now = datetime.datetime.utcnow()
430
if self.last_checked_ok is None:
431
return now < (self.created + self.timeout)
432
else:
433
return now < (self.last_checked_ok + self.timeout)
434
435
436
class ClientDBus(Client, dbus.service.Object):
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):
437
733
"""A Client class using D-Bus
438
734
439
735
Attributes:
440
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
736
dbus_object_path: dbus.ObjectPath
737
bus: dbus.SystemBus()
441
738
"""
739
740
runtime_expansions = (Client.runtime_expansions
741
+ ("dbus_object_path",))
742
442
743
# dbus.service.Object doesn't use super(), so we can't either.
443
744
444
def __init__(self, *args, **kwargs):
745
def __init__(self, bus = None, *args, **kwargs):
746
self._approvals_pending = 0
747
self.bus = bus
445
748
Client.__init__(self, *args, **kwargs)
446
749
# Only now, when this client is initialized, can it show up on
447
750
# the D-Bus
751
client_object_name = unicode(self.name).translate(
752
{ord("."): ord("_"),
753
ord("-"): ord("_")})
448
754
self.dbus_object_path = (dbus.ObjectPath
449
("/clients/"
450
+ self.name.replace(".", "_")))
451
dbus.service.Object.__init__(self, bus,
452
self.dbus_object_path)
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
453
781
def enable(self):
454
782
oldstate = getattr(self, "enabled", False)
455
783
r = Client.enable(self)
456
784
if oldstate != self.enabled:
457
785
# Emit D-Bus signals
458
self.PropertyChanged(dbus.String(u"enabled"),
786
self.PropertyChanged(dbus.String("Enabled"),
459
787
dbus.Boolean(True, variant_level=1))
460
self.PropertyChanged(dbus.String(u"last_enabled"),
461
(_datetime_to_dbus(self.last_enabled,
462
variant_level=1)))
788
self.PropertyChanged(
789
dbus.String("LastEnabled"),
790
self._datetime_to_dbus(self.last_enabled,
791
variant_level=1))
463
792
return r
464
793
465
def disable(self, signal = True):
794
def disable(self, quiet = False):
466
795
oldstate = getattr(self, "enabled", False)
467
r = Client.disable(self)
468
if signal and oldstate != self.enabled:
796
r = Client.disable(self, quiet=quiet)
797
if not quiet and oldstate != self.enabled:
469
798
# Emit D-Bus signal
470
self.PropertyChanged(dbus.String(u"enabled"),
799
self.PropertyChanged(dbus.String("Enabled"),
471
800
dbus.Boolean(False, variant_level=1))
472
801
return r
473
802
476
805
self.remove_from_connection()
477
806
except LookupError:
478
807
pass
479
if hasattr(dbus.service.Object, "__del__"):
480
dbus.service.Object.__del__(self, *args, **kwargs)
808
if hasattr(DBusObjectWithProperties, "__del__"):
809
DBusObjectWithProperties.__del__(self, *args, **kwargs)
481
810
Client.__del__(self, *args, **kwargs)
482
811
483
812
def checker_callback(self, pid, condition, command,
485
814
self.checker_callback_tag = None
486
815
self.checker = None
487
816
# Emit D-Bus signal
488
self.PropertyChanged(dbus.String(u"checker_running"),
817
self.PropertyChanged(dbus.String("CheckerRunning"),
489
818
dbus.Boolean(False, variant_level=1))
490
819
if os.WIFEXITED(condition):
491
820
exitstatus = os.WEXITSTATUS(condition)
503
832
*args, **kwargs)
504
833
505
834
def checked_ok(self, *args, **kwargs):
506
r = Client.checked_ok(self, *args, **kwargs)
507
# Emit D-Bus signal
508
self.PropertyChanged(
509
dbus.String(u"last_checked_ok"),
510
(_datetime_to_dbus(self.last_checked_ok,
511
variant_level=1)))
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)))
512
849
return r
513
850
514
851
def start_checker(self, *args, **kwargs):
524
861
# Emit D-Bus signal
525
862
self.CheckerStarted(self.current_checker_command)
526
863
self.PropertyChanged(
527
dbus.String("checker_running"),
864
dbus.String("CheckerRunning"),
528
865
dbus.Boolean(True, variant_level=1))
529
866
return r
530
867
533
870
r = Client.stop_checker(self, *args, **kwargs)
534
871
if (old_checker is not None
535
872
and getattr(self, "checker", None) is None):
536
self.PropertyChanged(dbus.String(u"checker_running"),
873
self.PropertyChanged(dbus.String("CheckerRunning"),
537
874
dbus.Boolean(False, variant_level=1))
538
875
return r
539
540
## D-Bus methods & signals
541
_interface = u"se.bsnet.fukt.Mandos.Client"
542
543
# CheckedOK - method
544
CheckedOK = dbus.service.method(_interface)(checked_ok)
545
CheckedOK.__name__ = "CheckedOK"
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
546
893
547
894
# CheckerCompleted - signal
548
895
@dbus.service.signal(_interface, signature="nxs")
556
903
"D-Bus signal"
557
904
pass
558
905
559
# GetAllProperties - method
560
@dbus.service.method(_interface, out_signature="a{sv}")
561
def GetAllProperties(self):
562
"D-Bus method"
563
return dbus.Dictionary({
564
dbus.String("name"):
565
dbus.String(self.name, variant_level=1),
566
dbus.String("fingerprint"):
567
dbus.String(self.fingerprint, variant_level=1),
568
dbus.String("host"):
569
dbus.String(self.host, variant_level=1),
570
dbus.String("created"):
571
_datetime_to_dbus(self.created, variant_level=1),
572
dbus.String("last_enabled"):
573
(_datetime_to_dbus(self.last_enabled,
574
variant_level=1)
575
if self.last_enabled is not None
576
else dbus.Boolean(False, variant_level=1)),
577
dbus.String("enabled"):
578
dbus.Boolean(self.enabled, variant_level=1),
579
dbus.String("last_checked_ok"):
580
(_datetime_to_dbus(self.last_checked_ok,
581
variant_level=1)
582
if self.last_checked_ok is not None
583
else dbus.Boolean (False, variant_level=1)),
584
dbus.String("timeout"):
585
dbus.UInt64(self.timeout_milliseconds(),
586
variant_level=1),
587
dbus.String("interval"):
588
dbus.UInt64(self.interval_milliseconds(),
589
variant_level=1),
590
dbus.String("checker"):
591
dbus.String(self.checker_command,
592
variant_level=1),
593
dbus.String("checker_running"):
594
dbus.Boolean(self.checker is not None,
595
variant_level=1),
596
dbus.String("object_path"):
597
dbus.ObjectPath(self.dbus_object_path,
598
variant_level=1)
599
}, signature="sv")
600
601
# IsStillValid - method
602
@dbus.service.method(_interface, out_signature="b")
603
def IsStillValid(self):
604
return self.still_valid()
605
606
906
# PropertyChanged - signal
607
907
@dbus.service.signal(_interface, signature="sv")
608
908
def PropertyChanged(self, property, value):
609
909
"D-Bus signal"
610
910
pass
611
911
612
# ReceivedSecret - signal
912
# GotSecret - signal
613
913
@dbus.service.signal(_interface)
614
def ReceivedSecret(self):
615
"D-Bus signal"
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
"""
616
919
pass
617
920
618
921
# Rejected - signal
619
@dbus.service.signal(_interface)
620
def Rejected(self):
922
@dbus.service.signal(_interface, signature="s")
923
def Rejected(self, reason):
621
924
"D-Bus signal"
622
925
pass
623
926
624
# SetChecker - method
625
@dbus.service.method(_interface, in_signature="s")
626
def SetChecker(self, checker):
627
"D-Bus setter method"
628
self.checker_command = checker
629
# Emit D-Bus signal
630
self.PropertyChanged(dbus.String(u"checker"),
631
dbus.String(self.checker_command,
632
variant_level=1))
633
634
# SetHost - method
635
@dbus.service.method(_interface, in_signature="s")
636
def SetHost(self, host):
637
"D-Bus setter method"
638
self.host = host
639
# Emit D-Bus signal
640
self.PropertyChanged(dbus.String(u"host"),
641
dbus.String(self.host, variant_level=1))
642
643
# SetInterval - method
644
@dbus.service.method(_interface, in_signature="t")
645
def SetInterval(self, milliseconds):
646
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
647
# Emit D-Bus signal
648
self.PropertyChanged(dbus.String(u"interval"),
649
(dbus.UInt64(self.interval_milliseconds(),
650
variant_level=1)))
651
652
# SetSecret - method
653
@dbus.service.method(_interface, in_signature="ay",
654
byte_arrays=True)
655
def SetSecret(self, secret):
656
"D-Bus setter method"
657
self.secret = str(secret)
658
659
# SetTimeout - method
660
@dbus.service.method(_interface, in_signature="t")
661
def SetTimeout(self, milliseconds):
662
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
663
# Emit D-Bus signal
664
self.PropertyChanged(dbus.String(u"timeout"),
665
(dbus.UInt64(self.timeout_milliseconds(),
666
variant_level=1)))
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()
667
944
668
945
# Enable - method
669
Enable = dbus.service.method(_interface)(enable)
670
Enable.__name__ = "Enable"
946
@dbus.service.method(_interface)
947
def Enable(self):
948
"D-Bus method"
949
self.enable()
671
950
672
951
# StartChecker - method
673
952
@dbus.service.method(_interface)
682
961
self.disable()
683
962
684
963
# StopChecker - method
685
StopChecker = dbus.service.method(_interface)(stop_checker)
686
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)
687
1153
688
1154
del _interface
689
1155
690
1156
691
class ClientHandler(SocketServer.BaseRequestHandler, object):
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):
692
1184
"""A class to handle client connections.
693
1185
694
1186
Instantiated once for each connection to handle it.
695
1187
Note: This will run in its own forked process."""
696
1188
697
1189
def handle(self):
698
logger.info(u"TCP connection from: %s",
699
unicode(self.client_address))
700
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
701
# Open IPC pipe to parent process
702
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
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
703
1196
session = (gnutls.connection
704
1197
.ClientSession(self.request,
705
1198
gnutls.connection
706
1199
.X509Credentials()))
707
708
line = self.request.makefile().readline()
709
logger.debug(u"Protocol version: %r", line)
710
try:
711
if int(line.strip().split()[0]) > 1:
712
raise RuntimeError
713
except (ValueError, IndexError, RuntimeError), error:
714
logger.error(u"Unknown protocol version: %s", error)
715
return
716
1200
717
1201
# Note: gnutls.connection.X509Credentials is really a
718
1202
# generic GnuTLS certificate credentials object so long as
719
1203
# no X.509 keys are added to it. Therefore, we can use it
720
1204
# here despite using OpenPGP certificates.
721
1205
722
1206
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
723
# "+AES-256-CBC", "+SHA1",
724
# "+COMP-NULL", "+CTYPE-OPENPGP",
725
# "+DHE-DSS"))
1207
# "+AES-256-CBC", "+SHA1",
1208
# "+COMP-NULL", "+CTYPE-OPENPGP",
1209
# "+DHE-DSS"))
726
1210
# Use a fallback default, since this MUST be set.
727
1211
priority = self.server.gnutls_priority
728
1212
if priority is None:
730
1214
(gnutls.library.functions
731
1215
.gnutls_priority_set_direct(session._c_object,
732
1216
priority, None))
733
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
734
1230
try:
735
1231
session.handshake()
736
except gnutls.errors.GNUTLSError, error:
737
logger.warning(u"Handshake failed: %s", error)
1232
except gnutls.errors.GNUTLSError as error:
1233
logger.warning("Handshake failed: %s", error)
738
1234
# Do not run session.bye() here: the session is not
739
1235
# established. Just abandon the request.
740
1236
return
741
logger.debug(u"Handshake succeeded")
1237
logger.debug("Handshake succeeded")
1238
1239
approval_required = False
742
1240
try:
743
fpr = self.fingerprint(self.peer_certificate(session))
744
except (TypeError, gnutls.errors.GNUTLSError), error:
745
logger.warning(u"Bad certificate: %s", error)
746
session.bye()
747
return
748
logger.debug(u"Fingerprint: %s", fpr)
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()
749
1328
750
for c in self.server.clients:
751
if c.fingerprint == fpr:
752
client = c
753
break
754
else:
755
ipc.write("NOTFOUND %s\n" % fpr)
756
session.bye()
757
return
758
# Have to check if client.still_valid(), since it is
759
# possible that the client timed out while establishing
760
# the GnuTLS session.
761
if not client.still_valid():
762
ipc.write("INVALID %s\n" % client.name)
763
session.bye()
764
return
765
ipc.write("SENDING %s\n" % client.name)
766
sent_size = 0
767
while sent_size < len(client.secret):
768
sent = session.send(client.secret[sent_size:])
769
logger.debug(u"Sent: %d, remaining: %d",
770
sent, len(client.secret)
771
- (sent_size + sent))
772
sent_size += sent
773
session.bye()
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")
774
1336
775
1337
@staticmethod
776
1338
def peer_certificate(session):
832
1394
# Convert the buffer to a Python bytestring
833
1395
fpr = ctypes.string_at(buf, buf_len.value)
834
1396
# Convert the bytestring to hexadecimal notation
835
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1397
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
836
1398
return hex_fpr
837
1399
838
1400
839
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
840
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
841
842
Assumes a gobject.MainLoop event loop.
843
"""
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 """
844
1417
def process_request(self, request, client_address):
845
1418
"""Overrides and wraps the original process_request().
846
1419
847
This function creates a new pipe in self.pipe
1420
This function creates a new pipe in self.pipe
848
1421
"""
849
self.pipe = os.pipe()
850
super(ForkingMixInWithPipe,
1422
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1423
1424
super(MultiprocessingMixInWithPipe,
851
1425
self).process_request(request, client_address)
852
os.close(self.pipe[1]) # close write end
853
# Call "handle_ipc" for both data and EOF events
854
gobject.io_add_watch(self.pipe[0],
855
gobject.IO_IN | gobject.IO_HUP,
856
self.handle_ipc)
857
def handle_ipc(source, condition):
1426
self.child_pipe.close()
1427
self.add_pipe(parent_pipe)
1428
1429
def add_pipe(self, parent_pipe):
858
1430
"""Dummy function; override as necessary"""
859
os.close(source)
860
return False
861
862
863
class IPv6_TCPServer(ForkingMixInWithPipe,
864
SocketServer.TCPServer, object):
1431
raise NotImplementedError
1432
1433
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1434
socketserver.TCPServer, object):
865
1435
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
866
1436
867
1437
Attributes:
868
1438
enabled: Boolean; whether this server is activated yet
869
1439
interface: None or a network interface name (string)
870
1440
use_ipv6: Boolean; to use IPv6 or not
871
----
872
clients: Set() of Client objects
873
gnutls_priority GnuTLS priority string
874
use_dbus: Boolean; to emit D-Bus signals or not
875
1441
"""
876
1442
def __init__(self, server_address, RequestHandlerClass,
877
interface=None, use_ipv6=True, clients=None,
878
gnutls_priority=None, use_dbus=True):
879
self.enabled = False
1443
interface=None, use_ipv6=True):
880
1444
self.interface = interface
881
1445
if use_ipv6:
882
1446
self.address_family = socket.AF_INET6
883
self.clients = clients
884
self.use_dbus = use_dbus
885
self.gnutls_priority = gnutls_priority
886
SocketServer.TCPServer.__init__(self, server_address,
1447
socketserver.TCPServer.__init__(self, server_address,
887
1448
RequestHandlerClass)
888
1449
def server_bind(self):
889
1450
"""This overrides the normal server_bind() function
890
1451
to bind to an interface if one was specified, and also NOT to
891
1452
bind to an address or port if they were not specified."""
892
1453
if self.interface is not None:
893
try:
894
self.socket.setsockopt(socket.SOL_SOCKET,
895
SO_BINDTODEVICE,
896
self.interface + '\0')
897
except socket.error, error:
898
if error[0] == errno.EPERM:
899
logger.error(u"No permission to"
900
u" bind to interface %s",
901
self.interface)
902
else:
903
raise
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
904
1475
# Only bind(2) the socket if we really need to.
905
1476
if self.server_address[0] or self.server_address[1]:
906
1477
if not self.server_address[0]:
919
1490
# 0, # flowinfo
920
1491
# if_nametoindex
921
1492
# (self.interface))
922
return SocketServer.TCPServer.server_bind(self)
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)
923
1519
def server_activate(self):
924
1520
if self.enabled:
925
return SocketServer.TCPServer.server_activate(self)
1521
return socketserver.TCPServer.server_activate(self)
926
1522
def enable(self):
927
1523
self.enabled = True
928
def handle_ipc(self, source, condition, file_objects={}):
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):
929
1533
condition_names = {
930
gobject.IO_IN: "IN", # There is data to read.
1534
gobject.IO_IN: "IN", # There is data to read.
931
1535
gobject.IO_OUT: "OUT", # Data can be written (without
932
# blocking).
1536
# blocking).
933
1537
gobject.IO_PRI: "PRI", # There is urgent data to read.
934
1538
gobject.IO_ERR: "ERR", # Error condition.
935
1539
gobject.IO_HUP: "HUP" # Hung up (the connection has been
936
# broken, usually for pipes and
937
# sockets).
1540
# broken, usually for pipes and
1541
# sockets).
938
1542
}
939
1543
conditions_string = ' | '.join(name
940
1544
for cond, name in
941
1545
condition_names.iteritems()
942
1546
if cond & condition)
943
logger.debug("Handling IPC: FD = %d, condition = %s", source,
944
conditions_string)
945
946
# Turn the pipe file descriptor into a Python file object
947
if source not in file_objects:
948
file_objects[source] = os.fdopen(source, "r", 1)
949
950
# Read a line from the file object
951
cmdline = file_objects[source].readline()
952
if not cmdline: # Empty line means end of file
953
# close the IPC pipe
954
file_objects[source].close()
955
del file_objects[source]
956
957
# Stop calling this function
958
return False
959
960
logger.debug("IPC command: %r", cmdline)
961
962
# Parse and act on command
963
cmd, args = cmdline.rstrip("\r\n").split(None, 1)
964
965
if cmd == "NOTFOUND":
966
logger.warning(u"Client not found for fingerprint: %s",
967
args)
968
if self.use_dbus:
969
# Emit D-Bus signal
970
mandos_dbus_service.ClientNotFound(args)
971
elif cmd == "INVALID":
972
for client in self.clients:
973
if client.name == args:
974
logger.warning(u"Client %s is invalid", args)
975
if self.use_dbus:
976
# Emit D-Bus signal
977
client.Rejected()
978
break
979
else:
980
logger.error(u"Unknown client %s is invalid", args)
981
elif cmd == "SENDING":
982
for client in self.clients:
983
if client.name == args:
984
logger.info(u"Sending secret to %s", client.name)
985
client.checked_ok()
986
if self.use_dbus:
987
# Emit D-Bus signal
988
client.ReceivedSecret()
989
break
990
else:
991
logger.error(u"Sending secret to unknown client %s",
992
args)
993
else:
994
logger.error("Unknown IPC command: %r", cmdline)
995
996
# Keep calling this function
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
997
1599
return True
998
1600
999
1601
1008
1610
datetime.timedelta(0, 3600)
1009
1611
>>> string_to_delta('24h')
1010
1612
datetime.timedelta(1)
1011
>>> string_to_delta(u'1w')
1613
>>> string_to_delta('1w')
1012
1614
datetime.timedelta(7)
1013
1615
>>> string_to_delta('5m 30s')
1014
1616
datetime.timedelta(0, 330)
1018
1620
try:
1019
1621
suffix = unicode(s[-1])
1020
1622
value = int(s[:-1])
1021
if suffix == u"d":
1623
if suffix == "d":
1022
1624
delta = datetime.timedelta(value)
1023
elif suffix == u"s":
1625
elif suffix == "s":
1024
1626
delta = datetime.timedelta(0, value)
1025
elif suffix == u"m":
1627
elif suffix == "m":
1026
1628
delta = datetime.timedelta(0, 0, 0, 0, value)
1027
elif suffix == u"h":
1629
elif suffix == "h":
1028
1630
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1029
elif suffix == u"w":
1631
elif suffix == "w":
1030
1632
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1031
1633
else:
1032
raise ValueError
1033
except (ValueError, IndexError):
1034
raise ValueError
1634
raise ValueError("Unknown suffix %r" % suffix)
1635
except (ValueError, IndexError) as e:
1636
raise ValueError(*(e.args))
1035
1637
timevalue += delta
1036
1638
return timevalue
1037
1639
1038
1640
1039
def server_state_changed(state):
1040
"""Derived from the Avahi example code"""
1041
if state == avahi.SERVER_COLLISION:
1042
logger.error(u"Zeroconf server name collision")
1043
service.remove()
1044
elif state == avahi.SERVER_RUNNING:
1045
service.add()
1046
1047
1048
def entry_group_state_changed(state, error):
1049
"""Derived from the Avahi example code"""
1050
logger.debug(u"Avahi state change: %i", state)
1051
1052
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1053
logger.debug(u"Zeroconf service established.")
1054
elif state == avahi.ENTRY_GROUP_COLLISION:
1055
logger.warning(u"Zeroconf service name collision.")
1056
service.rename()
1057
elif state == avahi.ENTRY_GROUP_FAILURE:
1058
logger.critical(u"Avahi: Error in group state changed %s",
1059
unicode(error))
1060
raise AvahiGroupError(u"State changed: %s" % unicode(error))
1061
1062
1641
def if_nametoindex(interface):
1063
"""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."""
1064
1645
global if_nametoindex
1065
1646
try:
1066
1647
if_nametoindex = (ctypes.cdll.LoadLibrary
1067
1648
(ctypes.util.find_library("c"))
1068
1649
.if_nametoindex)
1069
1650
except (OSError, AttributeError):
1070
if "struct" not in sys.modules:
1071
import struct
1072
if "fcntl" not in sys.modules:
1073
import fcntl
1651
logger.warning("Doing if_nametoindex the hard way")
1074
1652
def if_nametoindex(interface):
1075
1653
"Get an interface index the hard way, i.e. using fcntl()"
1076
1654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1077
with closing(socket.socket()) as s:
1655
with contextlib.closing(socket.socket()) as s:
1078
1656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1079
struct.pack("16s16x", interface))
1080
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]
1081
1661
return interface_index
1082
1662
return if_nametoindex(interface)
1083
1663
1098
1678
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1099
1679
if not stat.S_ISCHR(os.fstat(null).st_mode):
1100
1680
raise OSError(errno.ENODEV,
1101
"/dev/null not a character device")
1681
"%s not a character device"
1682
% os.path.devnull)
1102
1683
os.dup2(null, sys.stdin.fileno())
1103
1684
os.dup2(null, sys.stdout.fileno())
1104
1685
os.dup2(null, sys.stderr.fileno())
1108
1689
1109
1690
def main():
1110
1691
1111
######################################################################
1692
##################################################################
1112
1693
# Parsing of options, both command line and config file
1113
1694
1114
parser = optparse.OptionParser(version = "%%prog %s" % version)
1115
parser.add_option("-i", "--interface", type="string",
1116
metavar="IF", help="Bind to interface IF")
1117
parser.add_option("-a", "--address", type="string",
1118
help="Address to listen for requests on")
1119
parser.add_option("-p", "--port", type="int",
1120
help="Port number to receive requests on")
1121
parser.add_option("--check", action="store_true",
1122
help="Run self-test")
1123
parser.add_option("--debug", action="store_true",
1124
help="Debug mode; run in foreground and log to"
1125
" terminal")
1126
parser.add_option("--priority", type="string", help="GnuTLS"
1127
" priority string (see GnuTLS documentation)")
1128
parser.add_option("--servicename", type="string", metavar="NAME",
1129
help="Zeroconf service name")
1130
parser.add_option("--configdir", type="string",
1131
default="/etc/mandos", metavar="DIR",
1132
help="Directory to search for configuration"
1133
" files")
1134
parser.add_option("--no-dbus", action="store_false",
1135
dest="use_dbus",
1136
help="Do not provide D-Bus system bus"
1137
" interface")
1138
parser.add_option("--no-ipv6", action="store_false",
1139
dest="use_ipv6", help="Do not use IPv6")
1140
options = parser.parse_args()[0]
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()
1141
1726
1142
1727
if options.check:
1143
1728
import doctest
1154
1739
"servicename": "Mandos",
1155
1740
"use_dbus": "True",
1156
1741
"use_ipv6": "True",
1742
"debuglevel": "",
1157
1743
}
1158
1744
1159
1745
# Parse config file for server-global settings
1160
server_config = ConfigParser.SafeConfigParser(server_defaults)
1746
server_config = configparser.SafeConfigParser(server_defaults)
1161
1747
del server_defaults
1162
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1748
server_config.read(os.path.join(options.configdir,
1749
"mandos.conf"))
1163
1750
# Convert the SafeConfigParser object to a dict
1164
1751
server_settings = server_config.defaults()
1165
1752
# Use the appropriate methods on the non-string config options
1166
server_settings["debug"] = server_config.getboolean("DEFAULT",
1167
"debug")
1168
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1169
"use_dbus")
1170
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1171
"use_ipv6")
1753
for option in ("debug", "use_dbus", "use_ipv6"):
1754
server_settings[option] = server_config.getboolean("DEFAULT",
1755
option)
1172
1756
if server_settings["port"]:
1173
1757
server_settings["port"] = server_config.getint("DEFAULT",
1174
1758
"port")
1178
1762
# options, if set.
1179
1763
for option in ("interface", "address", "port", "debug",
1180
1764
"priority", "servicename", "configdir",
1181
"use_dbus", "use_ipv6"):
1765
"use_dbus", "use_ipv6", "debuglevel"):
1182
1766
value = getattr(options, option)
1183
1767
if value is not None:
1184
1768
server_settings[option] = value
1185
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])
1186
1774
# Now we have our good server settings in "server_settings"
1187
1775
1188
1776
##################################################################
1189
1777
1190
1778
# For convenience
1191
1779
debug = server_settings["debug"]
1780
debuglevel = server_settings["debuglevel"]
1192
1781
use_dbus = server_settings["use_dbus"]
1193
1782
use_ipv6 = server_settings["use_ipv6"]
1194
1195
if not debug:
1196
syslogger.setLevel(logging.WARNING)
1197
console.setLevel(logging.WARNING)
1198
1783
1199
1784
if server_settings["servicename"] != "Mandos":
1200
1785
syslogger.setFormatter(logging.Formatter
1201
1786
('Mandos (%s) [%%(process)d]:'
1207
1792
"interval": "5m",
1208
1793
"checker": "fping -q -- %%(host)s",
1209
1794
"host": "",
1795
"approval_delay": "0s",
1796
"approval_duration": "1s",
1210
1797
}
1211
client_config = ConfigParser.SafeConfigParser(client_defaults)
1798
client_config = configparser.SafeConfigParser(client_defaults)
1212
1799
client_config.read(os.path.join(server_settings["configdir"],
1213
1800
"clients.conf"))
1214
1801
1215
1802
global mandos_dbus_service
1216
1803
mandos_dbus_service = None
1217
1804
1218
clients = Set()
1219
tcp_server = IPv6_TCPServer((server_settings["address"],
1220
server_settings["port"]),
1221
ClientHandler,
1222
interface=
1223
server_settings["interface"],
1224
use_ipv6=use_ipv6,
1225
clients=clients,
1226
gnutls_priority=
1227
server_settings["priority"],
1228
use_dbus=use_dbus)
1229
pidfilename = "/var/run/mandos.pid"
1230
try:
1231
pidfile = open(pidfilename, "w")
1232
except IOError:
1233
logger.error("Could not open file %r", pidfilename)
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)
1234
1820
1235
1821
try:
1236
1822
uid = pwd.getpwnam("_mandos").pw_uid
1242
1828
except KeyError:
1243
1829
try:
1244
1830
uid = pwd.getpwnam("nobody").pw_uid
1245
gid = pwd.getpwnam("nogroup").pw_gid
1831
gid = pwd.getpwnam("nobody").pw_gid
1246
1832
except KeyError:
1247
1833
uid = 65534
1248
1834
gid = 65534
1249
1835
try:
1250
1836
os.setgid(gid)
1251
1837
os.setuid(uid)
1252
except OSError, error:
1838
except OSError as error:
1253
1839
if error[0] != errno.EPERM:
1254
1840
raise error
1255
1841
1256
# 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
1257
1850
if debug:
1851
# Enable all possible GnuTLS debugging
1852
1258
1853
# "Use a log level over 10 to enable all debugging options."
1259
1854
# - GnuTLS manual
1260
1855
gnutls.library.functions.gnutls_global_set_log_level(11)
1265
1860
1266
1861
(gnutls.library.functions
1267
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)
1268
1872
1269
global service
1270
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1271
service = AvahiService(name = server_settings["servicename"],
1272
servicetype = "_mandos._tcp",
1273
protocol = protocol)
1274
if server_settings["interface"]:
1275
service.interface = (if_nametoindex
1276
(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()
1277
1877
1278
1878
global main_loop
1279
global bus
1280
global server
1281
1879
# From the Avahi example code
1282
1880
DBusGMainLoop(set_as_default=True )
1283
1881
main_loop = gobject.MainLoop()
1284
1882
bus = dbus.SystemBus()
1285
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1286
avahi.DBUS_PATH_SERVER),
1287
avahi.DBUS_INTERFACE_SERVER)
1288
1883
# End of Avahi example code
1289
1884
if use_dbus:
1290
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
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()
1291
1903
1292
1904
client_class = Client
1293
1905
if use_dbus:
1294
client_class = ClientDBus
1295
clients.update(Set(
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(
1296
1920
client_class(name = section,
1297
config= dict(client_config.items(section)))
1921
config= dict(client_config_items(
1922
client_config, section)))
1298
1923
for section in client_config.sections()))
1299
if not clients:
1300
logger.warning(u"No clients defined")
1301
1302
if debug:
1303
# Redirect stdin so all checkers get /dev/null
1304
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1305
os.dup2(null, sys.stdin.fileno())
1306
if null > 2:
1307
os.close(null)
1308
else:
1309
# No console logging
1310
logger.removeHandler(console)
1311
# Close all input and output, do double fork, etc.
1312
daemon()
1313
1314
try:
1315
with closing(pidfile):
1316
pid = os.getpid()
1317
pidfile.write(str(pid) + "\n")
1318
del pidfile
1319
except IOError:
1320
logger.error(u"Could not write to file %r with PID %d",
1321
pidfilename, pid)
1322
except NameError:
1323
# "pidfile" was never created
1324
pass
1325
del pidfilename
1326
1327
def cleanup():
1328
"Cleanup function; run on exit"
1329
global group
1330
# From the Avahi example code
1331
if not group is None:
1332
group.Free()
1333
group = None
1334
# End of Avahi example code
1924
if not tcp_server.clients:
1925
logger.warning("No clients defined")
1335
1926
1336
while clients:
1337
client = clients.pop()
1338
client.disable_hook = None
1339
client.disable()
1340
1341
atexit.register(cleanup)
1342
1343
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
1344
1941
signal.signal(signal.SIGINT, signal.SIG_IGN)
1942
1345
1943
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1346
1944
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1347
1945
1350
1948
"""A D-Bus proxy object"""
1351
1949
def __init__(self):
1352
1950
dbus.service.Object.__init__(self, bus, "/")
1353
_interface = u"se.bsnet.fukt.Mandos"
1951
_interface = "se.bsnet.fukt.Mandos"
1354
1952
1355
@dbus.service.signal(_interface, signature="oa{sv}")
1356
def ClientAdded(self, objpath, properties):
1953
@dbus.service.signal(_interface, signature="o")
1954
def ClientAdded(self, objpath):
1357
1955
"D-Bus signal"
1358
1956
pass
1359
1957
1360
@dbus.service.signal(_interface, signature="s")
1361
def ClientNotFound(self, fingerprint):
1958
@dbus.service.signal(_interface, signature="ss")
1959
def ClientNotFound(self, fingerprint, address):
1362
1960
"D-Bus signal"
1363
1961
pass
1364
1962
1370
1968
@dbus.service.method(_interface, out_signature="ao")
1371
1969
def GetAllClients(self):
1372
1970
"D-Bus method"
1373
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)
1374
1973
1375
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1974
@dbus.service.method(_interface,
1975
out_signature="a{oa{sv}}")
1376
1976
def GetAllClientsWithProperties(self):
1377
1977
"D-Bus method"
1378
1978
return dbus.Dictionary(
1379
((c.dbus_object_path, c.GetAllProperties())
1380
for c in clients),
1979
((c.dbus_object_path, c.GetAll(""))
1980
for c in tcp_server.clients),
1381
1981
signature="oa{sv}")
1382
1982
1383
1983
@dbus.service.method(_interface, in_signature="o")
1384
1984
def RemoveClient(self, object_path):
1385
1985
"D-Bus method"
1386
for c in clients:
1986
for c in tcp_server.clients:
1387
1987
if c.dbus_object_path == object_path:
1388
clients.remove(c)
1988
tcp_server.clients.remove(c)
1389
1989
c.remove_from_connection()
1390
1990
# Don't signal anything except ClientRemoved
1391
c.disable(signal=False)
1991
c.disable(quiet=True)
1392
1992
# Emit D-Bus signal
1393
1993
self.ClientRemoved(object_path, c.name)
1394
1994
return
1395
raise KeyError
1995
raise KeyError(object_path)
1396
1996
1397
1997
del _interface
1398
1998
1399
1999
mandos_dbus_service = MandosDBusService()
1400
2000
1401
for client in clients:
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:
1402
2020
if use_dbus:
1403
2021
# Emit D-Bus signal
1404
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1405
client.GetAllProperties())
2022
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1406
2023
client.enable()
1407
2024
1408
2025
tcp_server.enable()
1411
2028
# Find out what port we got
1412
2029
service.port = tcp_server.socket.getsockname()[1]
1413
2030
if use_ipv6:
1414
logger.info(u"Now listening on address %r, port %d,"
2031
logger.info("Now listening on address %r, port %d,"
1415
2032
" flowinfo %d, scope_id %d"
1416
2033
% tcp_server.socket.getsockname())
1417
2034
else: # IPv4
1418
logger.info(u"Now listening on address %r, port %d"
2035
logger.info("Now listening on address %r, port %d"
1419
2036
% tcp_server.socket.getsockname())
1420
2037
1421
2038
#service.interface = tcp_server.socket.getsockname()[3]
1422
2039
1423
2040
try:
1424
2041
# From the Avahi example code
1425
server.connect_to_signal("StateChanged", server_state_changed)
1426
2042
try:
1427
server_state_changed(server.GetState())
1428
except dbus.exceptions.DBusException, error:
1429
logger.critical(u"DBusException: %s", error)
2043
service.activate()
2044
except dbus.exceptions.DBusException as error:
2045
logger.critical("DBusException: %s", error)
2046
cleanup()
1430
2047
sys.exit(1)
1431
2048
# End of Avahi example code
1432
2049
1435
2052
(tcp_server.handle_request
1436
2053
(*args[2:], **kwargs) or True))
1437
2054
1438
logger.debug(u"Starting main loop")
2055
logger.debug("Starting main loop")
1439
2056
main_loop.run()
1440
except AvahiError, error:
1441
logger.critical(u"AvahiError: %s", error)
2057
except AvahiError as error:
2058
logger.critical("AvahiError: %s", error)
2059
cleanup()
1442
2060
sys.exit(1)
1443
2061
except KeyboardInterrupt:
1444
2062
if debug:
1445
print >> sys.stderr
2063
print("", file=sys.stderr)
1446
2064
logger.debug("Server received KeyboardInterrupt")
1447
2065
logger.debug("Server exiting")
2066
# Must run before the D-Bus bus name gets deregistered
2067
cleanup()
1448
2068
1449
2069
if __name__ == '__main__':
1450
2070
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0