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- Committer: Björn Påhlsson
- Date: 2010-09-04 13:31:36 UTC
- mfrom: (24.2.5 mandos-multiprocessing)
- mto: (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 421.
- Revision ID: belorn@fukt.bsnet.se-20100904133136-vhn6gxmunefopx3c
merge
new approve/deny functionallity in mandos-monitor
new approve/deny functionallity in mandos-monitor
- files added:
- dbus-mandos.conf
- files modified:
- INSTALL
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
14
# Copyright © 2008,2009 Teddy Hogeborn
33
33
34
34
from __future__ import division, with_statement, absolute_import
35
35
36
import SocketServer
36
import SocketServer as socketserver
37
37
import socket
38
38
import optparse
39
39
import datetime
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
from contextlib import closing
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
60
64
61
65
import dbus
62
66
import dbus.service
65
69
from dbus.mainloop.glib import DBusGMainLoop
66
70
import ctypes
67
71
import ctypes.util
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
72
88
syslogger = (logging.handlers.SysLogHandler
73
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
90
address = "/dev/log"))
75
91
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
77
94
logger.addHandler(syslogger)
78
95
79
96
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
82
100
logger.addHandler(console)
83
101
84
102
class AvahiError(Exception):
97
115
98
116
class AvahiService(object):
99
117
"""An Avahi (Zeroconf) service.
118
100
119
Attributes:
101
120
interface: integer; avahi.IF_UNSPEC or an interface index.
102
121
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
105
124
See <http://www.dns-sd.org/ServiceTypes.html>
106
125
port: integer; what port to announce
107
126
TXT: list of strings; TXT record for the service
110
129
max_renames: integer; maximum number of renames
111
130
rename_count: integer; counter so we only rename after collisions
112
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
113
135
"""
114
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
137
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
117
140
self.interface = interface
118
141
self.name = name
119
142
self.type = servicetype
123
146
self.host = host
124
147
self.rename_count = 0
125
148
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
126
153
def rename(self):
127
154
"""Derived from the Avahi example code"""
128
155
if self.rename_count >= self.max_renames:
130
157
u" after %i retries, exiting.",
131
158
self.rename_count)
132
159
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
160
self.name = self.server.GetAlternativeServiceName(self.name)
134
161
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
162
unicode(self.name))
136
163
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
139
167
self.remove()
140
168
self.add()
141
169
self.rename_count += 1
142
170
def remove(self):
143
171
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
172
if self.group is not None:
173
self.group.Reset()
146
174
def add(self):
147
175
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
176
if self.group is None:
177
self.group = dbus.Interface(
178
self.bus.get_object(avahi.DBUS_NAME,
179
self.server.EntryGroupNew()),
180
avahi.DBUS_INTERFACE_ENTRY_GROUP)
181
self.group.connect_to_signal('StateChanged',
182
self
183
.entry_group_state_changed)
156
184
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
185
self.name, self.type)
186
self.group.AddService(
187
self.interface,
188
self.protocol,
189
dbus.UInt32(0), # flags
190
self.name, self.type,
191
self.domain, self.host,
192
dbus.UInt16(self.port),
193
avahi.string_array_to_txt_array(self.TXT))
194
self.group.Commit()
195
def entry_group_state_changed(self, state, error):
196
"""Derived from the Avahi example code"""
197
logger.debug(u"Avahi state change: %i", state)
198
199
if state == avahi.ENTRY_GROUP_ESTABLISHED:
200
logger.debug(u"Zeroconf service established.")
201
elif state == avahi.ENTRY_GROUP_COLLISION:
202
logger.warning(u"Zeroconf service name collision.")
203
self.rename()
204
elif state == avahi.ENTRY_GROUP_FAILURE:
205
logger.critical(u"Avahi: Error in group state changed %s",
206
unicode(error))
207
raise AvahiGroupError(u"State changed: %s"
208
% unicode(error))
209
def cleanup(self):
210
"""Derived from the Avahi example code"""
211
if self.group is not None:
212
self.group.Free()
213
self.group = None
214
def server_state_changed(self, state):
215
"""Derived from the Avahi example code"""
216
if state == avahi.SERVER_COLLISION:
217
logger.error(u"Zeroconf server name collision")
218
self.remove()
219
elif state == avahi.SERVER_RUNNING:
220
self.add()
221
def activate(self):
222
"""Derived from the Avahi example code"""
223
if self.server is None:
224
self.server = dbus.Interface(
225
self.bus.get_object(avahi.DBUS_NAME,
226
avahi.DBUS_PATH_SERVER),
227
avahi.DBUS_INTERFACE_SERVER)
228
self.server.connect_to_signal(u"StateChanged",
229
self.server_state_changed)
230
self.server_state_changed(self.server.GetState())
231
232
233
class Client(object):
179
234
"""A representation of a client host served by this server.
235
180
236
Attributes:
181
237
name: string; from the config file, used in log messages and
182
238
D-Bus identifiers
189
245
enabled: bool()
190
246
last_checked_ok: datetime.datetime(); (UTC) or None
191
247
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
248
until this client is disabled
193
249
interval: datetime.timedelta(); How often to start a new checker
194
250
disable_hook: If set, called by disable() as disable_hook(self)
195
251
checker: subprocess.Popen(); a running checker process used
196
252
to see if the client lives.
197
253
'None' if no process is running.
198
254
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
255
disable_initiator_tag: - '' -
200
256
checker_callback_tag: - '' -
201
257
checker_command: string; External command which is run to check if
202
258
client lives. %() expansions are done at
203
259
runtime with vars(self) as dict, so that for
204
260
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
261
current_checker_command: string; current running checker_command
262
approved_delay: datetime.timedelta(); Time to wait for approval
263
_approved: bool(); 'None' if not yet approved/disapproved
264
approved_duration: datetime.timedelta(); Duration of one approval
207
265
"""
266
267
@staticmethod
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
273
208
274
def timeout_milliseconds(self):
209
275
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
276
return self._timedelta_to_milliseconds(self.timeout)
213
277
214
278
def interval_milliseconds(self):
215
279
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
280
return self._timedelta_to_milliseconds(self.interval)
281
282
def approved_delay_milliseconds(self):
283
return self._timedelta_to_milliseconds(self.approved_delay)
219
284
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
285
def __init__(self, name = None, disable_hook=None, config=None):
222
286
"""Note: the 'checker' key in 'config' sets the
223
287
'checker_command' attribute and *not* the 'checker'
224
288
attribute."""
226
290
if config is None:
227
291
config = {}
228
292
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
293
# Uppercase and remove spaces from fingerprint for later
231
294
# comparison purposes with return value from the fingerprint()
232
295
# function
233
self.fingerprint = (config["fingerprint"].upper()
296
self.fingerprint = (config[u"fingerprint"].upper()
234
297
.replace(u" ", u""))
235
298
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
299
if u"secret" in config:
300
self.secret = config[u"secret"].decode(u"base64")
301
elif u"secfile" in config:
302
with open(os.path.expanduser(os.path.expandvars
303
(config[u"secfile"])),
304
"rb") as secfile:
242
305
self.secret = secfile.read()
243
306
else:
307
#XXX Need to allow secret on demand!
244
308
raise TypeError(u"No secret or secfile for client %s"
245
309
% self.name)
246
self.host = config.get("host", "")
310
self.host = config.get(u"host", u"")
247
311
self.created = datetime.datetime.utcnow()
248
312
self.enabled = False
249
313
self.last_enabled = None
250
314
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
315
self.timeout = string_to_delta(config[u"timeout"])
316
self.interval = string_to_delta(config[u"interval"])
253
317
self.disable_hook = disable_hook
254
318
self.checker = None
255
319
self.checker_initiator_tag = None
256
320
self.disable_initiator_tag = None
257
321
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
322
self.checker_command = config[u"checker"]
323
self.current_checker_command = None
259
324
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
325
self._approved = None
326
self.approved_by_default = config.get(u"approved_by_default",
327
True)
328
self.approvals_pending = 0
329
self.approved_delay = string_to_delta(
330
config[u"approved_delay"])
331
self.approved_duration = string_to_delta(
332
config[u"approved_duration"])
333
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
269
334
335
def send_changedstate(self):
336
self.changedstate.acquire()
337
self.changedstate.notify_all()
338
self.changedstate.release()
339
270
340
def enable(self):
271
341
"""Start this client's checker and timeout hooks"""
342
if getattr(self, u"enabled", False):
343
# Already enabled
344
return
345
self.send_changedstate()
272
346
self.last_enabled = datetime.datetime.utcnow()
273
347
# Schedule a new checker to be started an 'interval' from now,
274
348
# and every interval from then on.
275
349
self.checker_initiator_tag = (gobject.timeout_add
276
350
(self.interval_milliseconds(),
277
351
self.start_checker))
278
# Also start a new checker *right now*.
279
self.start_checker()
280
352
# Schedule a disable() when 'timeout' has passed
281
353
self.disable_initiator_tag = (gobject.timeout_add
282
354
(self.timeout_milliseconds(),
283
355
self.disable))
284
356
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
357
# Also start a new checker *right now*.
358
self.start_checker()
292
359
293
def disable(self):
360
def disable(self, quiet=True):
294
361
"""Disable this client."""
295
362
if not getattr(self, "enabled", False):
296
363
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
364
if not quiet:
365
self.send_changedstate()
366
if not quiet:
367
logger.info(u"Disabling client %s", self.name)
368
if getattr(self, u"disable_initiator_tag", False):
299
369
gobject.source_remove(self.disable_initiator_tag)
300
370
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
371
if getattr(self, u"checker_initiator_tag", False):
302
372
gobject.source_remove(self.checker_initiator_tag)
303
373
self.checker_initiator_tag = None
304
374
self.stop_checker()
305
375
if self.disable_hook:
306
376
self.disable_hook(self)
307
377
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
312
378
# Do not run this again if called by a gobject.timeout_add
313
379
return False
314
380
320
386
"""The checker has completed, so take appropriate actions."""
321
387
self.checker_callback_tag = None
322
388
self.checker = None
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
389
if os.WIFEXITED(condition):
328
390
exitstatus = os.WEXITSTATUS(condition)
329
391
if exitstatus == 0:
333
395
else:
334
396
logger.info(u"Checker for %(name)s failed",
335
397
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
341
398
else:
342
399
logger.warning(u"Checker for %(name)s crashed?",
343
400
vars(self))
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
401
350
402
def checked_ok(self):
351
403
"""Bump up the timeout for this client.
404
352
405
This should only be called when the client has been seen,
353
406
alive and well.
354
407
"""
357
410
self.disable_initiator_tag = (gobject.timeout_add
358
411
(self.timeout_milliseconds(),
359
412
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
366
413
367
414
def start_checker(self):
368
415
"""Start a new checker subprocess if one is not running.
416
369
417
If a checker already exists, leave it running and do
370
418
nothing."""
371
419
# The reason for not killing a running checker is that if we
374
422
# client would inevitably timeout, since no checker would get
375
423
# a chance to run to completion. If we instead leave running
376
424
# checkers alone, the checker would have to take more time
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
425
# than 'timeout' for the client to be disabled, which is as it
426
# should be.
427
428
# If a checker exists, make sure it is not a zombie
429
try:
430
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
431
except (AttributeError, OSError), error:
432
if (isinstance(error, OSError)
433
and error.errno != errno.ECHILD):
434
raise error
435
else:
436
if pid:
437
logger.warning(u"Checker was a zombie")
438
gobject.source_remove(self.checker_callback_tag)
439
self.checker_callback(pid, status,
440
self.current_checker_command)
441
# Start a new checker if needed
379
442
if self.checker is None:
380
443
try:
381
444
# In case checker_command has exactly one % operator
382
445
command = self.checker_command % self.host
383
446
except TypeError:
384
447
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
448
escaped_attrs = dict((key,
449
re.escape(unicode(str(val),
450
errors=
451
u'replace')))
386
452
for key, val in
387
453
vars(self).iteritems())
388
454
try:
391
457
logger.error(u'Could not format string "%s":'
392
458
u' %s', self.checker_command, error)
393
459
return True # Try again later
460
self.current_checker_command = command
394
461
try:
395
462
logger.info(u"Starting checker %r for %s",
396
463
command, self.name)
400
467
# always replaced by /dev/null.)
401
468
self.checker = subprocess.Popen(command,
402
469
close_fds=True,
403
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
470
shell=True, cwd=u"/")
410
471
self.checker_callback_tag = (gobject.child_watch_add
411
472
(self.checker.pid,
412
473
self.checker_callback,
413
474
data=command))
475
# The checker may have completed before the gobject
476
# watch was added. Check for this.
477
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
478
if pid:
479
gobject.source_remove(self.checker_callback_tag)
480
self.checker_callback(pid, status, command)
414
481
except OSError, error:
415
482
logger.error(u"Failed to start subprocess: %s",
416
483
error)
422
489
if self.checker_callback_tag:
423
490
gobject.source_remove(self.checker_callback_tag)
424
491
self.checker_callback_tag = None
425
if getattr(self, "checker", None) is None:
492
if getattr(self, u"checker", None) is None:
426
493
return
427
494
logger.debug(u"Stopping checker for %(name)s", vars(self))
428
495
try:
429
496
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
497
#time.sleep(0.5)
431
498
#if self.checker.poll() is None:
432
499
# os.kill(self.checker.pid, signal.SIGKILL)
433
500
except OSError, error:
434
501
if error.errno != errno.ESRCH: # No such process
435
502
raise
436
503
self.checker = None
437
if self.use_dbus:
504
505
def dbus_service_property(dbus_interface, signature=u"v",
506
access=u"readwrite", byte_arrays=False):
507
"""Decorators for marking methods of a DBusObjectWithProperties to
508
become properties on the D-Bus.
509
510
The decorated method will be called with no arguments by "Get"
511
and with one argument by "Set".
512
513
The parameters, where they are supported, are the same as
514
dbus.service.method, except there is only "signature", since the
515
type from Get() and the type sent to Set() is the same.
516
"""
517
# Encoding deeply encoded byte arrays is not supported yet by the
518
# "Set" method, so we fail early here:
519
if byte_arrays and signature != u"ay":
520
raise ValueError(u"Byte arrays not supported for non-'ay'"
521
u" signature %r" % signature)
522
def decorator(func):
523
func._dbus_is_property = True
524
func._dbus_interface = dbus_interface
525
func._dbus_signature = signature
526
func._dbus_access = access
527
func._dbus_name = func.__name__
528
if func._dbus_name.endswith(u"_dbus_property"):
529
func._dbus_name = func._dbus_name[:-14]
530
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
531
return func
532
return decorator
533
534
535
class DBusPropertyException(dbus.exceptions.DBusException):
536
"""A base class for D-Bus property-related exceptions
537
"""
538
def __unicode__(self):
539
return unicode(str(self))
540
541
542
class DBusPropertyAccessException(DBusPropertyException):
543
"""A property's access permissions disallows an operation.
544
"""
545
pass
546
547
548
class DBusPropertyNotFound(DBusPropertyException):
549
"""An attempt was made to access a non-existing property.
550
"""
551
pass
552
553
554
class DBusObjectWithProperties(dbus.service.Object):
555
"""A D-Bus object with properties.
556
557
Classes inheriting from this can use the dbus_service_property
558
decorator to expose methods as D-Bus properties. It exposes the
559
standard Get(), Set(), and GetAll() methods on the D-Bus.
560
"""
561
562
@staticmethod
563
def _is_dbus_property(obj):
564
return getattr(obj, u"_dbus_is_property", False)
565
566
def _get_all_dbus_properties(self):
567
"""Returns a generator of (name, attribute) pairs
568
"""
569
return ((prop._dbus_name, prop)
570
for name, prop in
571
inspect.getmembers(self, self._is_dbus_property))
572
573
def _get_dbus_property(self, interface_name, property_name):
574
"""Returns a bound method if one exists which is a D-Bus
575
property with the specified name and interface.
576
"""
577
for name in (property_name,
578
property_name + u"_dbus_property"):
579
prop = getattr(self, name, None)
580
if (prop is None
581
or not self._is_dbus_property(prop)
582
or prop._dbus_name != property_name
583
or (interface_name and prop._dbus_interface
584
and interface_name != prop._dbus_interface)):
585
continue
586
return prop
587
# No such property
588
raise DBusPropertyNotFound(self.dbus_object_path + u":"
589
+ interface_name + u"."
590
+ property_name)
591
592
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
593
out_signature=u"v")
594
def Get(self, interface_name, property_name):
595
"""Standard D-Bus property Get() method, see D-Bus standard.
596
"""
597
prop = self._get_dbus_property(interface_name, property_name)
598
if prop._dbus_access == u"write":
599
raise DBusPropertyAccessException(property_name)
600
value = prop()
601
if not hasattr(value, u"variant_level"):
602
return value
603
return type(value)(value, variant_level=value.variant_level+1)
604
605
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
606
def Set(self, interface_name, property_name, value):
607
"""Standard D-Bus property Set() method, see D-Bus standard.
608
"""
609
prop = self._get_dbus_property(interface_name, property_name)
610
if prop._dbus_access == u"read":
611
raise DBusPropertyAccessException(property_name)
612
if prop._dbus_get_args_options[u"byte_arrays"]:
613
# The byte_arrays option is not supported yet on
614
# signatures other than "ay".
615
if prop._dbus_signature != u"ay":
616
raise ValueError
617
value = dbus.ByteArray(''.join(unichr(byte)
618
for byte in value))
619
prop(value)
620
621
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
622
out_signature=u"a{sv}")
623
def GetAll(self, interface_name):
624
"""Standard D-Bus property GetAll() method, see D-Bus
625
standard.
626
627
Note: Will not include properties with access="write".
628
"""
629
all = {}
630
for name, prop in self._get_all_dbus_properties():
631
if (interface_name
632
and interface_name != prop._dbus_interface):
633
# Interface non-empty but did not match
634
continue
635
# Ignore write-only properties
636
if prop._dbus_access == u"write":
637
continue
638
value = prop()
639
if not hasattr(value, u"variant_level"):
640
all[name] = value
641
continue
642
all[name] = type(value)(value, variant_level=
643
value.variant_level+1)
644
return dbus.Dictionary(all, signature=u"sv")
645
646
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
647
out_signature=u"s",
648
path_keyword='object_path',
649
connection_keyword='connection')
650
def Introspect(self, object_path, connection):
651
"""Standard D-Bus method, overloaded to insert property tags.
652
"""
653
xmlstring = dbus.service.Object.Introspect(self, object_path,
654
connection)
655
try:
656
document = xml.dom.minidom.parseString(xmlstring)
657
def make_tag(document, name, prop):
658
e = document.createElement(u"property")
659
e.setAttribute(u"name", name)
660
e.setAttribute(u"type", prop._dbus_signature)
661
e.setAttribute(u"access", prop._dbus_access)
662
return e
663
for if_tag in document.getElementsByTagName(u"interface"):
664
for tag in (make_tag(document, name, prop)
665
for name, prop
666
in self._get_all_dbus_properties()
667
if prop._dbus_interface
668
== if_tag.getAttribute(u"name")):
669
if_tag.appendChild(tag)
670
# Add the names to the return values for the
671
# "org.freedesktop.DBus.Properties" methods
672
if (if_tag.getAttribute(u"name")
673
== u"org.freedesktop.DBus.Properties"):
674
for cn in if_tag.getElementsByTagName(u"method"):
675
if cn.getAttribute(u"name") == u"Get":
676
for arg in cn.getElementsByTagName(u"arg"):
677
if (arg.getAttribute(u"direction")
678
== u"out"):
679
arg.setAttribute(u"name", u"value")
680
elif cn.getAttribute(u"name") == u"GetAll":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"props")
685
xmlstring = document.toxml(u"utf-8")
686
document.unlink()
687
except (AttributeError, xml.dom.DOMException,
688
xml.parsers.expat.ExpatError), error:
689
logger.error(u"Failed to override Introspection method",
690
error)
691
return xmlstring
692
693
694
class ClientDBus(Client, DBusObjectWithProperties):
695
"""A Client class using D-Bus
696
697
Attributes:
698
dbus_object_path: dbus.ObjectPath
699
bus: dbus.SystemBus()
700
"""
701
# dbus.service.Object doesn't use super(), so we can't either.
702
703
def __init__(self, bus = None, *args, **kwargs):
704
self._approvals_pending = 0
705
self.bus = bus
706
Client.__init__(self, *args, **kwargs)
707
# Only now, when this client is initialized, can it show up on
708
# the D-Bus
709
self.dbus_object_path = (dbus.ObjectPath
710
(u"/clients/"
711
+ self.name.replace(u".", u"_")))
712
DBusObjectWithProperties.__init__(self, self.bus,
713
self.dbus_object_path)
714
715
#Could possible return a bool(self._approvals_pending),
716
#but this could mess up approvals_pending += 1 XXX
717
def _get_approvals_pending(self):
718
return self._approvals_pending
719
def _set_approvals_pending(self, value):
720
old_value = self._approvals_pending
721
self._approvals_pending = value
722
bval = bool(value)
723
if (hasattr(self, "dbus_object_path")
724
and bval is not bool(old_value)):
725
dbus_bool = dbus.Boolean(bval, variant_level=1)
726
self.PropertyChanged(dbus.String(u"approved_pending"),
727
dbus_bool)
728
729
approvals_pending = property(_get_approvals_pending,
730
_set_approvals_pending)
731
del _get_approvals_pending, _set_approvals_pending
732
733
@staticmethod
734
def _datetime_to_dbus(dt, variant_level=0):
735
"""Convert a UTC datetime.datetime() to a D-Bus type."""
736
return dbus.String(dt.isoformat(),
737
variant_level=variant_level)
738
739
def enable(self):
740
oldstate = getattr(self, u"enabled", False)
741
r = Client.enable(self)
742
if oldstate != self.enabled:
743
# Emit D-Bus signals
744
self.PropertyChanged(dbus.String(u"enabled"),
745
dbus.Boolean(True, variant_level=1))
746
self.PropertyChanged(
747
dbus.String(u"last_enabled"),
748
self._datetime_to_dbus(self.last_enabled,
749
variant_level=1))
750
return r
751
752
def disable(self, quiet = False):
753
oldstate = getattr(self, u"enabled", False)
754
r = Client.disable(self, quiet=quiet)
755
if not quiet and oldstate != self.enabled:
756
# Emit D-Bus signal
757
self.PropertyChanged(dbus.String(u"enabled"),
758
dbus.Boolean(False, variant_level=1))
759
return r
760
761
def __del__(self, *args, **kwargs):
762
try:
763
self.remove_from_connection()
764
except LookupError:
765
pass
766
if hasattr(DBusObjectWithProperties, u"__del__"):
767
DBusObjectWithProperties.__del__(self, *args, **kwargs)
768
Client.__del__(self, *args, **kwargs)
769
770
def checker_callback(self, pid, condition, command,
771
*args, **kwargs):
772
self.checker_callback_tag = None
773
self.checker = None
774
# Emit D-Bus signal
775
self.PropertyChanged(dbus.String(u"checker_running"),
776
dbus.Boolean(False, variant_level=1))
777
if os.WIFEXITED(condition):
778
exitstatus = os.WEXITSTATUS(condition)
779
# Emit D-Bus signal
780
self.CheckerCompleted(dbus.Int16(exitstatus),
781
dbus.Int64(condition),
782
dbus.String(command))
783
else:
784
# Emit D-Bus signal
785
self.CheckerCompleted(dbus.Int16(-1),
786
dbus.Int64(condition),
787
dbus.String(command))
788
789
return Client.checker_callback(self, pid, condition, command,
790
*args, **kwargs)
791
792
def checked_ok(self, *args, **kwargs):
793
r = Client.checked_ok(self, *args, **kwargs)
794
# Emit D-Bus signal
795
self.PropertyChanged(
796
dbus.String(u"last_checked_ok"),
797
(self._datetime_to_dbus(self.last_checked_ok,
798
variant_level=1)))
799
return r
800
801
def start_checker(self, *args, **kwargs):
802
old_checker = self.checker
803
if self.checker is not None:
804
old_checker_pid = self.checker.pid
805
else:
806
old_checker_pid = None
807
r = Client.start_checker(self, *args, **kwargs)
808
# Only if new checker process was started
809
if (self.checker is not None
810
and old_checker_pid != self.checker.pid):
811
# Emit D-Bus signal
812
self.CheckerStarted(self.current_checker_command)
813
self.PropertyChanged(
814
dbus.String(u"checker_running"),
815
dbus.Boolean(True, variant_level=1))
816
return r
817
818
def stop_checker(self, *args, **kwargs):
819
old_checker = getattr(self, u"checker", None)
820
r = Client.stop_checker(self, *args, **kwargs)
821
if (old_checker is not None
822
and getattr(self, u"checker", None) is None):
438
823
self.PropertyChanged(dbus.String(u"checker_running"),
439
824
dbus.Boolean(False, variant_level=1))
440
441
def still_valid(self):
442
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
447
return now < (self.created + self.timeout)
448
else:
449
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
825
return r
826
827
def _reset_approved(self):
828
self._approved = None
829
return False
830
831
def approve(self, value=True):
832
self.send_changedstate()
833
self._approved = value
834
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
835
self._reset_approved)
836
837
838
## D-Bus methods, signals & properties
452
839
_interface = u"se.bsnet.fukt.Mandos.Client"
453
840
454
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
841
## Signals
457
842
458
843
# CheckerCompleted - signal
459
@dbus.service.signal(_interface, signature="nxs")
844
@dbus.service.signal(_interface, signature=u"nxs")
460
845
def CheckerCompleted(self, exitcode, waitstatus, command):
461
846
"D-Bus signal"
462
847
pass
463
848
464
849
# CheckerStarted - signal
465
@dbus.service.signal(_interface, signature="s")
850
@dbus.service.signal(_interface, signature=u"s")
466
851
def CheckerStarted(self, command):
467
852
"D-Bus signal"
468
853
pass
469
854
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
855
# PropertyChanged - signal
518
@dbus.service.signal(_interface, signature="sv")
856
@dbus.service.signal(_interface, signature=u"sv")
519
857
def PropertyChanged(self, property, value):
520
858
"D-Bus signal"
521
859
pass
522
860
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
861
# GotSecret - signal
862
# XXXTEDDY Is sent after succesfull transfer of secret from mandos-server to mandos-client
863
@dbus.service.signal(_interface)
864
def GotSecret(self):
865
"D-Bus signal"
866
pass
867
868
# Rejected - signal
869
@dbus.service.signal(_interface, signature=u"s")
870
def Rejected(self, reason):
871
"D-Bus signal"
872
pass
873
874
# NeedApproval - signal
875
@dbus.service.signal(_interface, signature=u"db")
876
def NeedApproval(self, timeout, default):
877
"D-Bus signal"
878
pass
879
880
## Methods
881
882
# Approve - method
883
@dbus.service.method(_interface, in_signature=u"b")
884
def Approve(self, value):
885
self.approve(value)
886
887
# CheckedOK - method
888
@dbus.service.method(_interface)
889
def CheckedOK(self):
890
return self.checked_ok()
566
891
567
892
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
893
@dbus.service.method(_interface)
894
def Enable(self):
895
"D-Bus method"
896
self.enable()
570
897
571
898
# StartChecker - method
572
899
@dbus.service.method(_interface)
581
908
self.disable()
582
909
583
910
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
911
@dbus.service.method(_interface)
912
def StopChecker(self):
913
self.stop_checker()
914
915
## Properties
916
917
# approved_pending - property
918
@dbus_service_property(_interface, signature=u"b", access=u"read")
919
def approved_pending_dbus_property(self):
920
return dbus.Boolean(bool(self.approvals_pending))
921
922
# approved_by_default - property
923
@dbus_service_property(_interface, signature=u"b",
924
access=u"readwrite")
925
def approved_by_default_dbus_property(self):
926
return dbus.Boolean(self.approved_by_default)
927
928
# approved_delay - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def approved_delay_dbus_property(self):
932
return dbus.UInt64(self.approved_delay_milliseconds())
933
934
# approved_duration - property
935
@dbus_service_property(_interface, signature=u"t",
936
access=u"readwrite")
937
def approved_duration_dbus_property(self):
938
return dbus.UInt64(self._timedelta_to_milliseconds(
939
self.approved_duration))
940
941
# name - property
942
@dbus_service_property(_interface, signature=u"s", access=u"read")
943
def name_dbus_property(self):
944
return dbus.String(self.name)
945
946
# fingerprint - property
947
@dbus_service_property(_interface, signature=u"s", access=u"read")
948
def fingerprint_dbus_property(self):
949
return dbus.String(self.fingerprint)
950
951
# host - property
952
@dbus_service_property(_interface, signature=u"s",
953
access=u"readwrite")
954
def host_dbus_property(self, value=None):
955
if value is None: # get
956
return dbus.String(self.host)
957
self.host = value
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"host"),
960
dbus.String(value, variant_level=1))
961
962
# created - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def created_dbus_property(self):
965
return dbus.String(self._datetime_to_dbus(self.created))
966
967
# last_enabled - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def last_enabled_dbus_property(self):
970
if self.last_enabled is None:
971
return dbus.String(u"")
972
return dbus.String(self._datetime_to_dbus(self.last_enabled))
973
974
# enabled - property
975
@dbus_service_property(_interface, signature=u"b",
976
access=u"readwrite")
977
def enabled_dbus_property(self, value=None):
978
if value is None: # get
979
return dbus.Boolean(self.enabled)
980
if value:
981
self.enable()
982
else:
983
self.disable()
984
985
# last_checked_ok - property
986
@dbus_service_property(_interface, signature=u"s",
987
access=u"readwrite")
988
def last_checked_ok_dbus_property(self, value=None):
989
if value is not None:
990
self.checked_ok()
991
return
992
if self.last_checked_ok is None:
993
return dbus.String(u"")
994
return dbus.String(self._datetime_to_dbus(self
995
.last_checked_ok))
996
997
# timeout - property
998
@dbus_service_property(_interface, signature=u"t",
999
access=u"readwrite")
1000
def timeout_dbus_property(self, value=None):
1001
if value is None: # get
1002
return dbus.UInt64(self.timeout_milliseconds())
1003
self.timeout = datetime.timedelta(0, 0, 0, value)
1004
# Emit D-Bus signal
1005
self.PropertyChanged(dbus.String(u"timeout"),
1006
dbus.UInt64(value, variant_level=1))
1007
if getattr(self, u"disable_initiator_tag", None) is None:
1008
return
1009
# Reschedule timeout
1010
gobject.source_remove(self.disable_initiator_tag)
1011
self.disable_initiator_tag = None
1012
time_to_die = (self.
1013
_timedelta_to_milliseconds((self
1014
.last_checked_ok
1015
+ self.timeout)
1016
- datetime.datetime
1017
.utcnow()))
1018
if time_to_die <= 0:
1019
# The timeout has passed
1020
self.disable()
1021
else:
1022
self.disable_initiator_tag = (gobject.timeout_add
1023
(time_to_die, self.disable))
1024
1025
# interval - property
1026
@dbus_service_property(_interface, signature=u"t",
1027
access=u"readwrite")
1028
def interval_dbus_property(self, value=None):
1029
if value is None: # get
1030
return dbus.UInt64(self.interval_milliseconds())
1031
self.interval = datetime.timedelta(0, 0, 0, value)
1032
# Emit D-Bus signal
1033
self.PropertyChanged(dbus.String(u"interval"),
1034
dbus.UInt64(value, variant_level=1))
1035
if getattr(self, u"checker_initiator_tag", None) is None:
1036
return
1037
# Reschedule checker run
1038
gobject.source_remove(self.checker_initiator_tag)
1039
self.checker_initiator_tag = (gobject.timeout_add
1040
(value, self.start_checker))
1041
self.start_checker() # Start one now, too
1042
1043
# checker - property
1044
@dbus_service_property(_interface, signature=u"s",
1045
access=u"readwrite")
1046
def checker_dbus_property(self, value=None):
1047
if value is None: # get
1048
return dbus.String(self.checker_command)
1049
self.checker_command = value
1050
# Emit D-Bus signal
1051
self.PropertyChanged(dbus.String(u"checker"),
1052
dbus.String(self.checker_command,
1053
variant_level=1))
1054
1055
# checker_running - property
1056
@dbus_service_property(_interface, signature=u"b",
1057
access=u"readwrite")
1058
def checker_running_dbus_property(self, value=None):
1059
if value is None: # get
1060
return dbus.Boolean(self.checker is not None)
1061
if value:
1062
self.start_checker()
1063
else:
1064
self.stop_checker()
1065
1066
# object_path - property
1067
@dbus_service_property(_interface, signature=u"o", access=u"read")
1068
def object_path_dbus_property(self):
1069
return self.dbus_object_path # is already a dbus.ObjectPath
1070
1071
# secret = property
1072
@dbus_service_property(_interface, signature=u"ay",
1073
access=u"write", byte_arrays=True)
1074
def secret_dbus_property(self, value):
1075
self.secret = str(value)
586
1076
587
1077
del _interface
588
1078
589
1079
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
596
# ...do the normal thing
597
return session.peer_certificate
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
604
" certificate")
605
if list_size.value == 0:
606
return None
607
cert = cert_list[0]
608
return ctypes.string_at(cert.data, cert.size)
609
610
611
def fingerprint(openpgp):
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
ctypes.POINTER
617
(ctypes.c_ubyte)),
618
ctypes.c_uint(len(openpgp))))
619
# New empty GnuTLS certificate
620
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
623
# Import the OpenPGP public key into the certificate
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
628
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
635
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
638
# Get the fingerprint from the certificate into the buffer
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
642
# Deinit the certificate
643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
646
# Convert the bytestring to hexadecimal notation
647
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
return hex_fpr
649
650
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
652
"""A TCP request handler class.
653
Instantiated by IPv6_TCPServer for each request to handle it.
1080
class ProxyClient(object):
1081
def __init__(self, child_pipe, fpr, address):
1082
self._pipe = child_pipe
1083
self._pipe.send(('init', fpr, address))
1084
if not self._pipe.recv():
1085
raise KeyError()
1086
1087
def __getattribute__(self, name):
1088
if(name == '_pipe'):
1089
return super(ProxyClient, self).__getattribute__(name)
1090
self._pipe.send(('getattr', name))
1091
data = self._pipe.recv()
1092
if data[0] == 'data':
1093
return data[1]
1094
if data[0] == 'function':
1095
def func(*args, **kwargs):
1096
self._pipe.send(('funcall', name, args, kwargs))
1097
return self._pipe.recv()[1]
1098
return func
1099
1100
def __setattr__(self, name, value):
1101
if(name == '_pipe'):
1102
return super(ProxyClient, self).__setattr__(name, value)
1103
self._pipe.send(('setattr', name, value))
1104
1105
1106
class ClientHandler(socketserver.BaseRequestHandler, object):
1107
"""A class to handle client connections.
1108
1109
Instantiated once for each connection to handle it.
654
1110
Note: This will run in its own forked process."""
655
1111
656
1112
def handle(self):
657
logger.info(u"TCP connection from: %s",
658
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
663
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
666
try:
667
if int(line.strip().split()[0]) > 1:
668
raise RuntimeError
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
671
return
672
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
677
678
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
# "+DHE-DSS"))
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
685
priority, None))
686
687
try:
688
session.handshake()
689
except gnutls.errors.GNUTLSError, error:
690
logger.warning(u"Handshake failed: %s", error)
691
# Do not run session.bye() here: the session is not
692
# established. Just abandon the request.
693
return
694
logger.debug(u"Handshake succeeded")
695
try:
696
fpr = fingerprint(peer_certificate(session))
697
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
699
session.bye()
700
return
701
logger.debug(u"Fingerprint: %s", fpr)
702
703
for c in self.server.clients:
704
if c.fingerprint == fpr:
705
client = c
706
break
707
else:
708
logger.warning(u"Client not found for fingerprint: %s",
709
fpr)
710
session.bye()
711
return
712
# Have to check if client.still_valid(), since it is possible
713
# that the client timed out while establishing the GnuTLS
714
# session.
715
if not client.still_valid():
716
logger.warning(u"Client %(name)s is invalid",
717
vars(client))
718
session.bye()
719
return
720
## This won't work here, since we're in a fork.
721
# client.checked_ok()
722
sent_size = 0
723
while sent_size < len(client.secret):
724
sent = session.send(client.secret[sent_size:])
725
logger.debug(u"Sent: %d, remaining: %d",
726
sent, len(client.secret)
727
- (sent_size + sent))
728
sent_size += sent
729
session.bye()
730
731
732
class IPv6_TCPServer(SocketServer.ForkingMixIn,
733
SocketServer.TCPServer, object):
734
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1113
with contextlib.closing(self.server.child_pipe) as child_pipe:
1114
logger.info(u"TCP connection from: %s",
1115
unicode(self.client_address))
1116
logger.debug(u"Pipe FD: %d",
1117
self.server.child_pipe.fileno())
1118
1119
session = (gnutls.connection
1120
.ClientSession(self.request,
1121
gnutls.connection
1122
.X509Credentials()))
1123
1124
# Note: gnutls.connection.X509Credentials is really a
1125
# generic GnuTLS certificate credentials object so long as
1126
# no X.509 keys are added to it. Therefore, we can use it
1127
# here despite using OpenPGP certificates.
1128
1129
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1130
# u"+AES-256-CBC", u"+SHA1",
1131
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1132
# u"+DHE-DSS"))
1133
# Use a fallback default, since this MUST be set.
1134
priority = self.server.gnutls_priority
1135
if priority is None:
1136
priority = u"NORMAL"
1137
(gnutls.library.functions
1138
.gnutls_priority_set_direct(session._c_object,
1139
priority, None))
1140
1141
# Start communication using the Mandos protocol
1142
# Get protocol number
1143
line = self.request.makefile().readline()
1144
logger.debug(u"Protocol version: %r", line)
1145
try:
1146
if int(line.strip().split()[0]) > 1:
1147
raise RuntimeError
1148
except (ValueError, IndexError, RuntimeError), error:
1149
logger.error(u"Unknown protocol version: %s", error)
1150
return
1151
1152
# Start GnuTLS connection
1153
try:
1154
session.handshake()
1155
except gnutls.errors.GNUTLSError, error:
1156
logger.warning(u"Handshake failed: %s", error)
1157
# Do not run session.bye() here: the session is not
1158
# established. Just abandon the request.
1159
return
1160
logger.debug(u"Handshake succeeded")
1161
1162
approval_required = False
1163
try:
1164
try:
1165
fpr = self.fingerprint(self.peer_certificate
1166
(session))
1167
except (TypeError, gnutls.errors.GNUTLSError), error:
1168
logger.warning(u"Bad certificate: %s", error)
1169
return
1170
logger.debug(u"Fingerprint: %s", fpr)
1171
1172
try:
1173
client = ProxyClient(child_pipe, fpr,
1174
self.client_address)
1175
except KeyError:
1176
return
1177
1178
if client.approved_delay:
1179
delay = client.approved_delay
1180
client.approvals_pending += 1
1181
approval_required = True
1182
1183
while True:
1184
if not client.enabled:
1185
logger.warning(u"Client %s is disabled",
1186
client.name)
1187
if self.server.use_dbus:
1188
# Emit D-Bus signal
1189
client.Rejected("Disabled")
1190
return
1191
1192
if client._approved or not client.approved_delay:
1193
#We are approved or approval is disabled
1194
break
1195
elif client._approved is None:
1196
logger.info(u"Client %s need approval",
1197
client.name)
1198
if self.server.use_dbus:
1199
# Emit D-Bus signal
1200
client.NeedApproval(
1201
client.approved_delay_milliseconds(),
1202
client.approved_by_default)
1203
else:
1204
logger.warning(u"Client %s was not approved",
1205
client.name)
1206
if self.server.use_dbus:
1207
# Emit D-Bus signal
1208
client.Rejected("Disapproved")
1209
return
1210
1211
#wait until timeout or approved
1212
#x = float(client._timedelta_to_milliseconds(delay))
1213
time = datetime.datetime.now()
1214
client.changedstate.acquire()
1215
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1216
client.changedstate.release()
1217
time2 = datetime.datetime.now()
1218
if (time2 - time) >= delay:
1219
if not client.approved_by_default:
1220
logger.warning("Client %s timed out while"
1221
" waiting for approval",
1222
client.name)
1223
if self.server.use_dbus:
1224
# Emit D-Bus signal
1225
client.Rejected("Time out")
1226
return
1227
else:
1228
break
1229
else:
1230
delay -= time2 - time
1231
1232
sent_size = 0
1233
while sent_size < len(client.secret):
1234
# XXX handle session exception
1235
sent = session.send(client.secret[sent_size:])
1236
logger.debug(u"Sent: %d, remaining: %d",
1237
sent, len(client.secret)
1238
- (sent_size + sent))
1239
sent_size += sent
1240
1241
logger.info(u"Sending secret to %s", client.name)
1242
# bump the timeout as if seen
1243
client.checked_ok()
1244
if self.server.use_dbus:
1245
# Emit D-Bus signal
1246
client.GotSecret()
1247
1248
finally:
1249
if approval_required:
1250
client.approvals_pending -= 1
1251
session.bye()
1252
1253
@staticmethod
1254
def peer_certificate(session):
1255
"Return the peer's OpenPGP certificate as a bytestring"
1256
# If not an OpenPGP certificate...
1257
if (gnutls.library.functions
1258
.gnutls_certificate_type_get(session._c_object)
1259
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1260
# ...do the normal thing
1261
return session.peer_certificate
1262
list_size = ctypes.c_uint(1)
1263
cert_list = (gnutls.library.functions
1264
.gnutls_certificate_get_peers
1265
(session._c_object, ctypes.byref(list_size)))
1266
if not bool(cert_list) and list_size.value != 0:
1267
raise gnutls.errors.GNUTLSError(u"error getting peer"
1268
u" certificate")
1269
if list_size.value == 0:
1270
return None
1271
cert = cert_list[0]
1272
return ctypes.string_at(cert.data, cert.size)
1273
1274
@staticmethod
1275
def fingerprint(openpgp):
1276
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1277
# New GnuTLS "datum" with the OpenPGP public key
1278
datum = (gnutls.library.types
1279
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1280
ctypes.POINTER
1281
(ctypes.c_ubyte)),
1282
ctypes.c_uint(len(openpgp))))
1283
# New empty GnuTLS certificate
1284
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1285
(gnutls.library.functions
1286
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1287
# Import the OpenPGP public key into the certificate
1288
(gnutls.library.functions
1289
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1290
gnutls.library.constants
1291
.GNUTLS_OPENPGP_FMT_RAW))
1292
# Verify the self signature in the key
1293
crtverify = ctypes.c_uint()
1294
(gnutls.library.functions
1295
.gnutls_openpgp_crt_verify_self(crt, 0,
1296
ctypes.byref(crtverify)))
1297
if crtverify.value != 0:
1298
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1299
raise (gnutls.errors.CertificateSecurityError
1300
(u"Verify failed"))
1301
# New buffer for the fingerprint
1302
buf = ctypes.create_string_buffer(20)
1303
buf_len = ctypes.c_size_t()
1304
# Get the fingerprint from the certificate into the buffer
1305
(gnutls.library.functions
1306
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1307
ctypes.byref(buf_len)))
1308
# Deinit the certificate
1309
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1310
# Convert the buffer to a Python bytestring
1311
fpr = ctypes.string_at(buf, buf_len.value)
1312
# Convert the bytestring to hexadecimal notation
1313
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1314
return hex_fpr
1315
1316
1317
class MultiprocessingMixIn(object):
1318
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1319
def sub_process_main(self, request, address):
1320
try:
1321
self.finish_request(request, address)
1322
except:
1323
self.handle_error(request, address)
1324
self.close_request(request)
1325
1326
def process_request(self, request, address):
1327
"""Start a new process to process the request."""
1328
multiprocessing.Process(target = self.sub_process_main,
1329
args = (request, address)).start()
1330
1331
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1332
""" adds a pipe to the MixIn """
1333
def process_request(self, request, client_address):
1334
"""Overrides and wraps the original process_request().
1335
1336
This function creates a new pipe in self.pipe
1337
"""
1338
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1339
1340
super(MultiprocessingMixInWithPipe,
1341
self).process_request(request, client_address)
1342
self.child_pipe.close()
1343
self.add_pipe(parent_pipe)
1344
1345
def add_pipe(self, parent_pipe):
1346
"""Dummy function; override as necessary"""
1347
pass
1348
1349
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1350
socketserver.TCPServer, object):
1351
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1352
735
1353
Attributes:
736
settings: Server settings
737
clients: Set() of Client objects
738
1354
enabled: Boolean; whether this server is activated yet
1355
interface: None or a network interface name (string)
1356
use_ipv6: Boolean; to use IPv6 or not
739
1357
"""
740
address_family = socket.AF_INET6
741
def __init__(self, *args, **kwargs):
742
if "settings" in kwargs:
743
self.settings = kwargs["settings"]
744
del kwargs["settings"]
745
if "clients" in kwargs:
746
self.clients = kwargs["clients"]
747
del kwargs["clients"]
748
self.enabled = False
749
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1358
def __init__(self, server_address, RequestHandlerClass,
1359
interface=None, use_ipv6=True):
1360
self.interface = interface
1361
if use_ipv6:
1362
self.address_family = socket.AF_INET6
1363
socketserver.TCPServer.__init__(self, server_address,
1364
RequestHandlerClass)
750
1365
def server_bind(self):
751
1366
"""This overrides the normal server_bind() function
752
1367
to bind to an interface if one was specified, and also NOT to
753
1368
bind to an address or port if they were not specified."""
754
if self.settings["interface"]:
755
# 25 is from /usr/include/asm-i486/socket.h
756
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
757
try:
758
self.socket.setsockopt(socket.SOL_SOCKET,
759
SO_BINDTODEVICE,
760
self.settings["interface"])
761
except socket.error, error:
762
if error[0] == errno.EPERM:
763
logger.error(u"No permission to"
764
u" bind to interface %s",
765
self.settings["interface"])
766
else:
767
raise error
1369
if self.interface is not None:
1370
if SO_BINDTODEVICE is None:
1371
logger.error(u"SO_BINDTODEVICE does not exist;"
1372
u" cannot bind to interface %s",
1373
self.interface)
1374
else:
1375
try:
1376
self.socket.setsockopt(socket.SOL_SOCKET,
1377
SO_BINDTODEVICE,
1378
str(self.interface
1379
+ u'\0'))
1380
except socket.error, error:
1381
if error[0] == errno.EPERM:
1382
logger.error(u"No permission to"
1383
u" bind to interface %s",
1384
self.interface)
1385
elif error[0] == errno.ENOPROTOOPT:
1386
logger.error(u"SO_BINDTODEVICE not available;"
1387
u" cannot bind to interface %s",
1388
self.interface)
1389
else:
1390
raise
768
1391
# Only bind(2) the socket if we really need to.
769
1392
if self.server_address[0] or self.server_address[1]:
770
1393
if not self.server_address[0]:
771
in6addr_any = "::"
772
self.server_address = (in6addr_any,
1394
if self.address_family == socket.AF_INET6:
1395
any_address = u"::" # in6addr_any
1396
else:
1397
any_address = socket.INADDR_ANY
1398
self.server_address = (any_address,
773
1399
self.server_address[1])
774
1400
elif not self.server_address[1]:
775
1401
self.server_address = (self.server_address[0],
776
1402
0)
777
# if self.settings["interface"]:
1403
# if self.interface:
778
1404
# self.server_address = (self.server_address[0],
779
1405
# 0, # port
780
1406
# 0, # flowinfo
781
1407
# if_nametoindex
782
# (self.settings
783
# ["interface"]))
784
return super(IPv6_TCPServer, self).server_bind()
1408
# (self.interface))
1409
return socketserver.TCPServer.server_bind(self)
1410
1411
1412
class MandosServer(IPv6_TCPServer):
1413
"""Mandos server.
1414
1415
Attributes:
1416
clients: set of Client objects
1417
gnutls_priority GnuTLS priority string
1418
use_dbus: Boolean; to emit D-Bus signals or not
1419
1420
Assumes a gobject.MainLoop event loop.
1421
"""
1422
def __init__(self, server_address, RequestHandlerClass,
1423
interface=None, use_ipv6=True, clients=None,
1424
gnutls_priority=None, use_dbus=True):
1425
self.enabled = False
1426
self.clients = clients
1427
if self.clients is None:
1428
self.clients = set()
1429
self.use_dbus = use_dbus
1430
self.gnutls_priority = gnutls_priority
1431
IPv6_TCPServer.__init__(self, server_address,
1432
RequestHandlerClass,
1433
interface = interface,
1434
use_ipv6 = use_ipv6)
785
1435
def server_activate(self):
786
1436
if self.enabled:
787
return super(IPv6_TCPServer, self).server_activate()
1437
return socketserver.TCPServer.server_activate(self)
788
1438
def enable(self):
789
1439
self.enabled = True
1440
def add_pipe(self, parent_pipe):
1441
# Call "handle_ipc" for both data and EOF events
1442
gobject.io_add_watch(parent_pipe.fileno(),
1443
gobject.IO_IN | gobject.IO_HUP,
1444
functools.partial(self.handle_ipc,
1445
parent_pipe = parent_pipe))
1446
1447
def handle_ipc(self, source, condition, parent_pipe=None,
1448
client_object=None):
1449
condition_names = {
1450
gobject.IO_IN: u"IN", # There is data to read.
1451
gobject.IO_OUT: u"OUT", # Data can be written (without
1452
# blocking).
1453
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1454
gobject.IO_ERR: u"ERR", # Error condition.
1455
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1456
# broken, usually for pipes and
1457
# sockets).
1458
}
1459
conditions_string = ' | '.join(name
1460
for cond, name in
1461
condition_names.iteritems()
1462
if cond & condition)
1463
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1464
conditions_string)
1465
1466
# XXXTEDDY error or the other end of multiprocessing.Pipe has closed
1467
if condition & gobject.IO_HUP or condition & gobject.IO_ERR:
1468
return False
1469
1470
# Read a request from the child
1471
request = parent_pipe.recv()
1472
logger.debug(u"IPC request: %s", repr(request))
1473
command = request[0]
1474
1475
if command == 'init':
1476
fpr = request[1]
1477
address = request[2]
1478
1479
for c in self.clients:
1480
if c.fingerprint == fpr:
1481
client = c
1482
break
1483
else:
1484
logger.warning(u"Client not found for fingerprint: %s, ad"
1485
u"dress: %s", fpr, address)
1486
if self.use_dbus:
1487
# Emit D-Bus signal
1488
mandos_dbus_service.ClientNotFound(fpr, address)
1489
parent_pipe.send(False)
1490
return False
1491
1492
gobject.io_add_watch(parent_pipe.fileno(),
1493
gobject.IO_IN | gobject.IO_HUP,
1494
functools.partial(self.handle_ipc,
1495
parent_pipe = parent_pipe,
1496
client_object = client))
1497
parent_pipe.send(True)
1498
# remove the old hook in favor of the new above hook on same fileno
1499
return False
1500
if command == 'funcall':
1501
funcname = request[1]
1502
args = request[2]
1503
kwargs = request[3]
1504
1505
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1506
1507
if command == 'getattr':
1508
attrname = request[1]
1509
if callable(client_object.__getattribute__(attrname)):
1510
parent_pipe.send(('function',))
1511
else:
1512
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1513
1514
if command == 'setattr':
1515
attrname = request[1]
1516
value = request[2]
1517
setattr(client_object, attrname, value)
1518
1519
return True
790
1520
791
1521
792
1522
def string_to_delta(interval):
793
1523
"""Parse a string and return a datetime.timedelta
794
1524
795
>>> string_to_delta('7d')
1525
>>> string_to_delta(u'7d')
796
1526
datetime.timedelta(7)
797
>>> string_to_delta('60s')
1527
>>> string_to_delta(u'60s')
798
1528
datetime.timedelta(0, 60)
799
>>> string_to_delta('60m')
1529
>>> string_to_delta(u'60m')
800
1530
datetime.timedelta(0, 3600)
801
>>> string_to_delta('24h')
1531
>>> string_to_delta(u'24h')
802
1532
datetime.timedelta(1)
803
1533
>>> string_to_delta(u'1w')
804
1534
datetime.timedelta(7)
805
>>> string_to_delta('5m 30s')
1535
>>> string_to_delta(u'5m 30s')
806
1536
datetime.timedelta(0, 330)
807
1537
"""
808
1538
timevalue = datetime.timedelta(0)
821
1551
elif suffix == u"w":
822
1552
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
823
1553
else:
824
raise ValueError
825
except (ValueError, IndexError):
826
raise ValueError
1554
raise ValueError(u"Unknown suffix %r" % suffix)
1555
except (ValueError, IndexError), e:
1556
raise ValueError(e.message)
827
1557
timevalue += delta
828
1558
return timevalue
829
1559
830
1560
831
def server_state_changed(state):
832
"""Derived from the Avahi example code"""
833
if state == avahi.SERVER_COLLISION:
834
logger.error(u"Zeroconf server name collision")
835
service.remove()
836
elif state == avahi.SERVER_RUNNING:
837
service.add()
838
839
840
def entry_group_state_changed(state, error):
841
"""Derived from the Avahi example code"""
842
logger.debug(u"Avahi state change: %i", state)
843
844
if state == avahi.ENTRY_GROUP_ESTABLISHED:
845
logger.debug(u"Zeroconf service established.")
846
elif state == avahi.ENTRY_GROUP_COLLISION:
847
logger.warning(u"Zeroconf service name collision.")
848
service.rename()
849
elif state == avahi.ENTRY_GROUP_FAILURE:
850
logger.critical(u"Avahi: Error in group state changed %s",
851
unicode(error))
852
raise AvahiGroupError(u"State changed: %s" % unicode(error))
853
854
1561
def if_nametoindex(interface):
855
"""Call the C function if_nametoindex(), or equivalent"""
1562
"""Call the C function if_nametoindex(), or equivalent
1563
1564
Note: This function cannot accept a unicode string."""
856
1565
global if_nametoindex
857
1566
try:
858
1567
if_nametoindex = (ctypes.cdll.LoadLibrary
859
(ctypes.util.find_library("c"))
1568
(ctypes.util.find_library(u"c"))
860
1569
.if_nametoindex)
861
1570
except (OSError, AttributeError):
862
if "struct" not in sys.modules:
863
import struct
864
if "fcntl" not in sys.modules:
865
import fcntl
1571
logger.warning(u"Doing if_nametoindex the hard way")
866
1572
def if_nametoindex(interface):
867
1573
"Get an interface index the hard way, i.e. using fcntl()"
868
1574
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
869
with closing(socket.socket()) as s:
1575
with contextlib.closing(socket.socket()) as s:
870
1576
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
871
struct.pack("16s16x", interface))
872
interface_index = struct.unpack("I", ifreq[16:20])[0]
1577
struct.pack(str(u"16s16x"),
1578
interface))
1579
interface_index = struct.unpack(str(u"I"),
1580
ifreq[16:20])[0]
873
1581
return interface_index
874
1582
return if_nametoindex(interface)
875
1583
876
1584
877
1585
def daemon(nochdir = False, noclose = False):
878
1586
"""See daemon(3). Standard BSD Unix function.
1587
879
1588
This should really exist as os.daemon, but it doesn't (yet)."""
880
1589
if os.fork():
881
1590
sys.exit()
882
1591
os.setsid()
883
1592
if not nochdir:
884
os.chdir("/")
1593
os.chdir(u"/")
885
1594
if os.fork():
886
1595
sys.exit()
887
1596
if not noclose:
889
1598
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
890
1599
if not stat.S_ISCHR(os.fstat(null).st_mode):
891
1600
raise OSError(errno.ENODEV,
892
"/dev/null not a character device")
1601
u"%s not a character device"
1602
% os.path.devnull)
893
1603
os.dup2(null, sys.stdin.fileno())
894
1604
os.dup2(null, sys.stdout.fileno())
895
1605
os.dup2(null, sys.stderr.fileno())
898
1608
899
1609
900
1610
def main():
1611
1612
##################################################################
1613
# Parsing of options, both command line and config file
1614
901
1615
parser = optparse.OptionParser(version = "%%prog %s" % version)
902
parser.add_option("-i", "--interface", type="string",
903
metavar="IF", help="Bind to interface IF")
904
parser.add_option("-a", "--address", type="string",
905
help="Address to listen for requests on")
906
parser.add_option("-p", "--port", type="int",
907
help="Port number to receive requests on")
908
parser.add_option("--check", action="store_true",
909
help="Run self-test")
910
parser.add_option("--debug", action="store_true",
911
help="Debug mode; run in foreground and log to"
912
" terminal")
913
parser.add_option("--priority", type="string", help="GnuTLS"
914
" priority string (see GnuTLS documentation)")
915
parser.add_option("--servicename", type="string", metavar="NAME",
916
help="Zeroconf service name")
917
parser.add_option("--configdir", type="string",
918
default="/etc/mandos", metavar="DIR",
919
help="Directory to search for configuration"
920
" files")
921
parser.add_option("--no-dbus", action="store_false",
922
dest="use_dbus",
923
help="Do not provide D-Bus system bus"
924
" interface")
1616
parser.add_option("-i", u"--interface", type=u"string",
1617
metavar="IF", help=u"Bind to interface IF")
1618
parser.add_option("-a", u"--address", type=u"string",
1619
help=u"Address to listen for requests on")
1620
parser.add_option("-p", u"--port", type=u"int",
1621
help=u"Port number to receive requests on")
1622
parser.add_option("--check", action=u"store_true",
1623
help=u"Run self-test")
1624
parser.add_option("--debug", action=u"store_true",
1625
help=u"Debug mode; run in foreground and log to"
1626
u" terminal")
1627
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1628
u" priority string (see GnuTLS documentation)")
1629
parser.add_option("--servicename", type=u"string",
1630
metavar=u"NAME", help=u"Zeroconf service name")
1631
parser.add_option("--configdir", type=u"string",
1632
default=u"/etc/mandos", metavar=u"DIR",
1633
help=u"Directory to search for configuration"
1634
u" files")
1635
parser.add_option("--no-dbus", action=u"store_false",
1636
dest=u"use_dbus", help=u"Do not provide D-Bus"
1637
u" system bus interface")
1638
parser.add_option("--no-ipv6", action=u"store_false",
1639
dest=u"use_ipv6", help=u"Do not use IPv6")
925
1640
options = parser.parse_args()[0]
926
1641
927
1642
if options.check:
930
1645
sys.exit()
931
1646
932
1647
# Default values for config file for server-global settings
933
server_defaults = { "interface": "",
934
"address": "",
935
"port": "",
936
"debug": "False",
937
"priority":
938
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
939
"servicename": "Mandos",
940
"use_dbus": "True",
1648
server_defaults = { u"interface": u"",
1649
u"address": u"",
1650
u"port": u"",
1651
u"debug": u"False",
1652
u"priority":
1653
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1654
u"servicename": u"Mandos",
1655
u"use_dbus": u"True",
1656
u"use_ipv6": u"True",
941
1657
}
942
1658
943
1659
# Parse config file for server-global settings
944
server_config = ConfigParser.SafeConfigParser(server_defaults)
1660
server_config = configparser.SafeConfigParser(server_defaults)
945
1661
del server_defaults
946
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1662
server_config.read(os.path.join(options.configdir,
1663
u"mandos.conf"))
947
1664
# Convert the SafeConfigParser object to a dict
948
1665
server_settings = server_config.defaults()
949
1666
# Use the appropriate methods on the non-string config options
950
server_settings["debug"] = server_config.getboolean("DEFAULT",
951
"debug")
952
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
953
"use_dbus")
1667
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1668
server_settings[option] = server_config.getboolean(u"DEFAULT",
1669
option)
954
1670
if server_settings["port"]:
955
server_settings["port"] = server_config.getint("DEFAULT",
956
"port")
1671
server_settings["port"] = server_config.getint(u"DEFAULT",
1672
u"port")
957
1673
del server_config
958
1674
959
1675
# Override the settings from the config file with command line
960
1676
# options, if set.
961
for option in ("interface", "address", "port", "debug",
962
"priority", "servicename", "configdir",
963
"use_dbus"):
1677
for option in (u"interface", u"address", u"port", u"debug",
1678
u"priority", u"servicename", u"configdir",
1679
u"use_dbus", u"use_ipv6"):
964
1680
value = getattr(options, option)
965
1681
if value is not None:
966
1682
server_settings[option] = value
967
1683
del options
1684
# Force all strings to be unicode
1685
for option in server_settings.keys():
1686
if type(server_settings[option]) is str:
1687
server_settings[option] = unicode(server_settings[option])
968
1688
# Now we have our good server settings in "server_settings"
969
1689
1690
##################################################################
1691
970
1692
# For convenience
971
debug = server_settings["debug"]
972
use_dbus = server_settings["use_dbus"]
973
974
def sigsegvhandler(signum, frame):
975
raise RuntimeError('Segmentation fault')
1693
debug = server_settings[u"debug"]
1694
use_dbus = server_settings[u"use_dbus"]
1695
use_ipv6 = server_settings[u"use_ipv6"]
976
1696
977
1697
if not debug:
978
1698
syslogger.setLevel(logging.WARNING)
979
1699
console.setLevel(logging.WARNING)
980
else:
981
signal.signal(signal.SIGSEGV, sigsegvhandler)
982
1700
983
if server_settings["servicename"] != "Mandos":
1701
if server_settings[u"servicename"] != u"Mandos":
984
1702
syslogger.setFormatter(logging.Formatter
985
('Mandos (%s): %%(levelname)s:'
986
' %%(message)s'
987
% server_settings["servicename"]))
1703
(u'Mandos (%s) [%%(process)d]:'
1704
u' %%(levelname)s: %%(message)s'
1705
% server_settings[u"servicename"]))
988
1706
989
1707
# Parse config file with clients
990
client_defaults = { "timeout": "1h",
991
"interval": "5m",
992
"checker": "fping -q -- %%(host)s",
993
"host": "",
1708
client_defaults = { u"timeout": u"1h",
1709
u"interval": u"5m",
1710
u"checker": u"fping -q -- %%(host)s",
1711
u"host": u"",
1712
u"approved_delay": u"0s",
1713
u"approved_duration": u"1s",
994
1714
}
995
client_config = ConfigParser.SafeConfigParser(client_defaults)
996
client_config.read(os.path.join(server_settings["configdir"],
997
"clients.conf"))
998
999
clients = Set()
1000
tcp_server = IPv6_TCPServer((server_settings["address"],
1001
server_settings["port"]),
1002
TCP_handler,
1003
settings=server_settings,
1004
clients=clients)
1005
pidfilename = "/var/run/mandos.pid"
1006
try:
1007
pidfile = open(pidfilename, "w")
1008
except IOError, error:
1009
logger.error("Could not open file %r", pidfilename)
1010
1011
try:
1012
uid = pwd.getpwnam("_mandos").pw_uid
1013
gid = pwd.getpwnam("_mandos").pw_gid
1715
client_config = configparser.SafeConfigParser(client_defaults)
1716
client_config.read(os.path.join(server_settings[u"configdir"],
1717
u"clients.conf"))
1718
1719
global mandos_dbus_service
1720
mandos_dbus_service = None
1721
1722
tcp_server = MandosServer((server_settings[u"address"],
1723
server_settings[u"port"]),
1724
ClientHandler,
1725
interface=server_settings[u"interface"],
1726
use_ipv6=use_ipv6,
1727
gnutls_priority=
1728
server_settings[u"priority"],
1729
use_dbus=use_dbus)
1730
pidfilename = u"/var/run/mandos.pid"
1731
try:
1732
pidfile = open(pidfilename, u"w")
1733
except IOError:
1734
logger.error(u"Could not open file %r", pidfilename)
1735
1736
try:
1737
uid = pwd.getpwnam(u"_mandos").pw_uid
1738
gid = pwd.getpwnam(u"_mandos").pw_gid
1014
1739
except KeyError:
1015
1740
try:
1016
uid = pwd.getpwnam("mandos").pw_uid
1017
gid = pwd.getpwnam("mandos").pw_gid
1741
uid = pwd.getpwnam(u"mandos").pw_uid
1742
gid = pwd.getpwnam(u"mandos").pw_gid
1018
1743
except KeyError:
1019
1744
try:
1020
uid = pwd.getpwnam("nobody").pw_uid
1021
gid = pwd.getpwnam("nogroup").pw_gid
1745
uid = pwd.getpwnam(u"nobody").pw_uid
1746
gid = pwd.getpwnam(u"nobody").pw_gid
1022
1747
except KeyError:
1023
1748
uid = 65534
1024
1749
gid = 65534
1037
1762
1038
1763
@gnutls.library.types.gnutls_log_func
1039
1764
def debug_gnutls(level, string):
1040
logger.debug("GnuTLS: %s", string[:-1])
1765
logger.debug(u"GnuTLS: %s", string[:-1])
1041
1766
1042
1767
(gnutls.library.functions
1043
1768
.gnutls_global_set_log_function(debug_gnutls))
1044
1769
1045
global service
1046
service = AvahiService(name = server_settings["servicename"],
1047
servicetype = "_mandos._tcp", )
1048
if server_settings["interface"]:
1049
service.interface = (if_nametoindex
1050
(server_settings["interface"]))
1051
1052
1770
global main_loop
1053
global bus
1054
global server
1055
1771
# From the Avahi example code
1056
1772
DBusGMainLoop(set_as_default=True )
1057
1773
main_loop = gobject.MainLoop()
1058
1774
bus = dbus.SystemBus()
1059
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1060
avahi.DBUS_PATH_SERVER),
1061
avahi.DBUS_INTERFACE_SERVER)
1062
1775
# End of Avahi example code
1063
1776
if use_dbus:
1064
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1065
1066
clients.update(Set(Client(name = section,
1067
config
1068
= dict(client_config.items(section)),
1069
use_dbus = use_dbus)
1070
for section in client_config.sections()))
1071
if not clients:
1777
try:
1778
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1779
bus, do_not_queue=True)
1780
except dbus.exceptions.NameExistsException, e:
1781
logger.error(unicode(e) + u", disabling D-Bus")
1782
use_dbus = False
1783
server_settings[u"use_dbus"] = False
1784
tcp_server.use_dbus = False
1785
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1786
service = AvahiService(name = server_settings[u"servicename"],
1787
servicetype = u"_mandos._tcp",
1788
protocol = protocol, bus = bus)
1789
if server_settings["interface"]:
1790
service.interface = (if_nametoindex
1791
(str(server_settings[u"interface"])))
1792
1793
global multiprocessing_manager
1794
multiprocessing_manager = multiprocessing.Manager()
1795
1796
client_class = Client
1797
if use_dbus:
1798
client_class = functools.partial(ClientDBus, bus = bus)
1799
def client_config_items(config, section):
1800
special_settings = {
1801
"approved_by_default":
1802
lambda: config.getboolean(section,
1803
"approved_by_default"),
1804
}
1805
for name, value in config.items(section):
1806
try:
1807
yield (name, special_settings[name]())
1808
except KeyError:
1809
yield (name, value)
1810
1811
tcp_server.clients.update(set(
1812
client_class(name = section,
1813
config= dict(client_config_items(
1814
client_config, section)))
1815
for section in client_config.sections()))
1816
if not tcp_server.clients:
1072
1817
logger.warning(u"No clients defined")
1073
1818
1074
1819
if debug:
1084
1829
daemon()
1085
1830
1086
1831
try:
1087
pid = os.getpid()
1088
pidfile.write(str(pid) + "\n")
1089
pidfile.close()
1832
with pidfile:
1833
pid = os.getpid()
1834
pidfile.write(str(pid) + "\n")
1090
1835
del pidfile
1091
1836
except IOError:
1092
1837
logger.error(u"Could not write to file %r with PID %d",
1096
1841
pass
1097
1842
del pidfilename
1098
1843
1099
def cleanup():
1100
"Cleanup function; run on exit"
1101
global group
1102
# From the Avahi example code
1103
if not group is None:
1104
group.Free()
1105
group = None
1106
# End of Avahi example code
1107
1108
while clients:
1109
client = clients.pop()
1110
client.disable_hook = None
1111
client.disable()
1112
1113
atexit.register(cleanup)
1114
1115
1844
if not debug:
1116
1845
signal.signal(signal.SIGINT, signal.SIG_IGN)
1117
1846
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1118
1847
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1119
1848
1120
1849
if use_dbus:
1121
class MandosServer(dbus.service.Object):
1850
class MandosDBusService(dbus.service.Object):
1122
1851
"""A D-Bus proxy object"""
1123
1852
def __init__(self):
1124
dbus.service.Object.__init__(self, bus, "/")
1853
dbus.service.Object.__init__(self, bus, u"/")
1125
1854
_interface = u"se.bsnet.fukt.Mandos"
1126
1855
1127
@dbus.service.signal(_interface, signature="oa{sv}")
1128
def ClientAdded(self, objpath, properties):
1129
"D-Bus signal"
1130
pass
1131
1132
@dbus.service.signal(_interface, signature="os")
1856
@dbus.service.signal(_interface, signature=u"o")
1857
def ClientAdded(self, objpath):
1858
"D-Bus signal"
1859
pass
1860
1861
@dbus.service.signal(_interface, signature=u"ss")
1862
def ClientNotFound(self, fingerprint, address):
1863
"D-Bus signal"
1864
pass
1865
1866
@dbus.service.signal(_interface, signature=u"os")
1133
1867
def ClientRemoved(self, objpath, name):
1134
1868
"D-Bus signal"
1135
1869
pass
1136
1870
1137
@dbus.service.method(_interface, out_signature="ao")
1871
@dbus.service.method(_interface, out_signature=u"ao")
1138
1872
def GetAllClients(self):
1139
1873
"D-Bus method"
1140
return dbus.Array(c.dbus_object_path for c in clients)
1874
return dbus.Array(c.dbus_object_path
1875
for c in tcp_server.clients)
1141
1876
1142
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1877
@dbus.service.method(_interface,
1878
out_signature=u"a{oa{sv}}")
1143
1879
def GetAllClientsWithProperties(self):
1144
1880
"D-Bus method"
1145
1881
return dbus.Dictionary(
1146
((c.dbus_object_path, c.GetAllProperties())
1147
for c in clients),
1148
signature="oa{sv}")
1882
((c.dbus_object_path, c.GetAll(u""))
1883
for c in tcp_server.clients),
1884
signature=u"oa{sv}")
1149
1885
1150
@dbus.service.method(_interface, in_signature="o")
1886
@dbus.service.method(_interface, in_signature=u"o")
1151
1887
def RemoveClient(self, object_path):
1152
1888
"D-Bus method"
1153
for c in clients:
1889
for c in tcp_server.clients:
1154
1890
if c.dbus_object_path == object_path:
1155
clients.remove(c)
1891
tcp_server.clients.remove(c)
1892
c.remove_from_connection()
1156
1893
# Don't signal anything except ClientRemoved
1157
c.use_dbus = False
1158
c.disable()
1894
c.disable(quiet=True)
1159
1895
# Emit D-Bus signal
1160
1896
self.ClientRemoved(object_path, c.name)
1161
1897
return
1162
raise KeyError
1898
raise KeyError(object_path)
1163
1899
1164
1900
del _interface
1165
1901
1166
mandos_server = MandosServer()
1167
1168
for client in clients:
1902
mandos_dbus_service = MandosDBusService()
1903
1904
def cleanup():
1905
"Cleanup function; run on exit"
1906
service.cleanup()
1907
1908
while tcp_server.clients:
1909
client = tcp_server.clients.pop()
1910
if use_dbus:
1911
client.remove_from_connection()
1912
client.disable_hook = None
1913
# Don't signal anything except ClientRemoved
1914
client.disable(quiet=True)
1915
if use_dbus:
1916
# Emit D-Bus signal
1917
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1918
client.name)
1919
1920
atexit.register(cleanup)
1921
1922
for client in tcp_server.clients:
1169
1923
if use_dbus:
1170
1924
# Emit D-Bus signal
1171
mandos_server.ClientAdded(client.dbus_object_path,
1172
client.GetAllProperties())
1925
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1173
1926
client.enable()
1174
1927
1175
1928
tcp_server.enable()
1177
1930
1178
1931
# Find out what port we got
1179
1932
service.port = tcp_server.socket.getsockname()[1]
1180
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1181
u" scope_id %d" % tcp_server.socket.getsockname())
1933
if use_ipv6:
1934
logger.info(u"Now listening on address %r, port %d,"
1935
" flowinfo %d, scope_id %d"
1936
% tcp_server.socket.getsockname())
1937
else: # IPv4
1938
logger.info(u"Now listening on address %r, port %d"
1939
% tcp_server.socket.getsockname())
1182
1940
1183
1941
#service.interface = tcp_server.socket.getsockname()[3]
1184
1942
1185
1943
try:
1186
1944
# From the Avahi example code
1187
server.connect_to_signal("StateChanged", server_state_changed)
1188
1945
try:
1189
server_state_changed(server.GetState())
1946
service.activate()
1190
1947
except dbus.exceptions.DBusException, error:
1191
1948
logger.critical(u"DBusException: %s", error)
1949
cleanup()
1192
1950
sys.exit(1)
1193
1951
# End of Avahi example code
1194
1952
1201
1959
main_loop.run()
1202
1960
except AvahiError, error:
1203
1961
logger.critical(u"AvahiError: %s", error)
1962
cleanup()
1204
1963
sys.exit(1)
1205
1964
except KeyboardInterrupt:
1206
1965
if debug:
1207
print
1966
print >> sys.stderr
1967
logger.debug(u"Server received KeyboardInterrupt")
1968
logger.debug(u"Server exiting")
1969
# Must run before the D-Bus bus name gets deregistered
1970
cleanup()
1208
1971
1209
1972
if __name__ == '__main__':
1210
1973
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0