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- Committer: Teddy Hogeborn
- Date: 2009-01-18 06:41:57 UTC
- Revision ID: teddy@fukt.bsnet.se-20090118064157-8o4oia1y0t8di0xj
* debian/mandos-client.lintian-overrides: Remove override for
unbreakable line in
plugin-runner manual page.
* plugin-runner.xml (EXAMPLES): Make long command line more breakable.
unbreakable line in
plugin-runner manual page.
* plugin-runner.xml (EXAMPLES): Make long command line more breakable.
- files removed:
- 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", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 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
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
from __future__ import division, with_statement, absolute_import
36
35
37
import SocketServer as socketserver
36
import SocketServer
38
37
import socket
39
import argparse
38
import optparse
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
import ConfigParser as configparser
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
58
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import hashlib
59
from contextlib import closing
67
60
68
61
import dbus
69
62
import dbus.service
72
65
from dbus.mainloop.glib import DBusGMainLoop
73
66
import ctypes
74
67
import ctypes.util
75
import xml.dom.minidom
76
import inspect
77
import Crypto.Cipher.AES
78
79
try:
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
except AttributeError:
82
try:
83
from IN import SO_BINDTODEVICE
84
except ImportError:
85
SO_BINDTODEVICE = None
86
87
88
version = "1.4.1"
89
stored_state_path = "/var/lib/mandos/clients.pickle"
90
91
logger = logging.getLogger()
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
92
72
syslogger = (logging.handlers.SysLogHandler
93
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
def initlogger(level=logging.WARNING):
97
"""init logger and add loglevel"""
98
99
syslogger.setFormatter(logging.Formatter
100
('Mandos [%(process)d]: %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(syslogger)
103
104
console = logging.StreamHandler()
105
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
106
' [%(process)d]:'
107
' %(levelname)s:'
108
' %(message)s'))
109
logger.addHandler(console)
110
logger.setLevel(level)
111
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
112
83
113
84
class AvahiError(Exception):
114
85
def __init__(self, value, *args, **kwargs):
126
97
127
98
class AvahiService(object):
128
99
"""An Avahi (Zeroconf) service.
129
130
100
Attributes:
131
101
interface: integer; avahi.IF_UNSPEC or an interface index.
132
102
Used to optionally bind to the specified interface.
140
110
max_renames: integer; maximum number of renames
141
111
rename_count: integer; counter so we only rename after collisions
142
112
a sensible number of times
143
group: D-Bus Entry Group
144
server: D-Bus Server
145
bus: dbus.SystemBus()
146
113
"""
147
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
148
115
servicetype = None, port = None, TXT = None,
149
domain = "", host = "", max_renames = 32768,
150
protocol = avahi.PROTO_UNSPEC, bus = None):
116
domain = "", host = "", max_renames = 32768):
151
117
self.interface = interface
152
118
self.name = name
153
119
self.type = servicetype
157
123
self.host = host
158
124
self.rename_count = 0
159
125
self.max_renames = max_renames
160
self.protocol = protocol
161
self.group = None # our entry group
162
self.server = None
163
self.bus = bus
164
self.entry_group_state_changed_match = None
165
126
def rename(self):
166
127
"""Derived from the Avahi example code"""
167
128
if self.rename_count >= self.max_renames:
168
logger.critical("No suitable Zeroconf service name found"
169
" after %i retries, exiting.",
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
170
131
self.rename_count)
171
raise AvahiServiceError("Too many renames")
172
self.name = unicode(self.server
173
.GetAlternativeServiceName(self.name))
174
logger.info("Changing Zeroconf service name to %r ...",
175
self.name)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
176
139
self.remove()
177
try:
178
self.add()
179
except dbus.exceptions.DBusException as error:
180
logger.critical("DBusException: %s", error)
181
self.cleanup()
182
os._exit(1)
140
self.add()
183
141
self.rename_count += 1
184
142
def remove(self):
185
143
"""Derived from the Avahi example code"""
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
189
if self.group is not None:
190
self.group.Reset()
144
if group is not None:
145
group.Reset()
191
146
def add(self):
192
147
"""Derived from the Avahi example code"""
193
self.remove()
194
if self.group is None:
195
self.group = dbus.Interface(
196
self.bus.get_object(avahi.DBUS_NAME,
197
self.server.EntryGroupNew()),
198
avahi.DBUS_INTERFACE_ENTRY_GROUP)
199
self.entry_group_state_changed_match = (
200
self.group.connect_to_signal(
201
'StateChanged', self.entry_group_state_changed))
202
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
203
self.name, self.type)
204
self.group.AddService(
205
self.interface,
206
self.protocol,
207
dbus.UInt32(0), # flags
208
self.name, self.type,
209
self.domain, self.host,
210
dbus.UInt16(self.port),
211
avahi.string_array_to_txt_array(self.TXT))
212
self.group.Commit()
213
def entry_group_state_changed(self, state, error):
214
"""Derived from the Avahi example code"""
215
logger.debug("Avahi entry group state change: %i", state)
216
217
if state == avahi.ENTRY_GROUP_ESTABLISHED:
218
logger.debug("Zeroconf service established.")
219
elif state == avahi.ENTRY_GROUP_COLLISION:
220
logger.info("Zeroconf service name collision.")
221
self.rename()
222
elif state == avahi.ENTRY_GROUP_FAILURE:
223
logger.critical("Avahi: Error in group state changed %s",
224
unicode(error))
225
raise AvahiGroupError("State changed: %s"
226
% unicode(error))
227
def cleanup(self):
228
"""Derived from the Avahi example code"""
229
if self.group is not None:
230
try:
231
self.group.Free()
232
except (dbus.exceptions.UnknownMethodException,
233
dbus.exceptions.DBusException) as e:
234
pass
235
self.group = None
236
self.remove()
237
def server_state_changed(self, state, error=None):
238
"""Derived from the Avahi example code"""
239
logger.debug("Avahi server state change: %i", state)
240
bad_states = { avahi.SERVER_INVALID:
241
"Zeroconf server invalid",
242
avahi.SERVER_REGISTERING: None,
243
avahi.SERVER_COLLISION:
244
"Zeroconf server name collision",
245
avahi.SERVER_FAILURE:
246
"Zeroconf server failure" }
247
if state in bad_states:
248
if bad_states[state] is not None:
249
if error is None:
250
logger.error(bad_states[state])
251
else:
252
logger.error(bad_states[state] + ": %r", error)
253
self.cleanup()
254
elif state == avahi.SERVER_RUNNING:
255
self.add()
256
else:
257
if error is None:
258
logger.debug("Unknown state: %r", state)
259
else:
260
logger.debug("Unknown state: %r: %r", state, error)
261
def activate(self):
262
"""Derived from the Avahi example code"""
263
if self.server is None:
264
self.server = dbus.Interface(
265
self.bus.get_object(avahi.DBUS_NAME,
266
avahi.DBUS_PATH_SERVER,
267
follow_name_owner_changes=True),
268
avahi.DBUS_INTERFACE_SERVER)
269
self.server.connect_to_signal("StateChanged",
270
self.server_state_changed)
271
self.server_state_changed(self.server.GetState())
272
273
class AvahiServiceToSyslog(AvahiService):
274
def rename(self):
275
"""Add the new name to the syslog messages"""
276
ret = AvahiService.rename(self)
277
syslogger.setFormatter(logging.Formatter
278
('Mandos (%s) [%%(process)d]:'
279
' %%(levelname)s: %%(message)s'
280
% self.name))
281
return ret
282
283
def _timedelta_to_milliseconds(td):
284
"Convert a datetime.timedelta() to milliseconds"
285
return ((td.days * 24 * 60 * 60 * 1000)
286
+ (td.seconds * 1000)
287
+ (td.microseconds // 1000))
288
289
class Client(object):
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)
156
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):
290
179
"""A representation of a client host served by this server.
291
292
180
Attributes:
293
_approved: bool(); 'None' if not yet approved/disapproved
294
approval_delay: datetime.timedelta(); Time to wait for approval
295
approval_duration: datetime.timedelta(); Duration of one approval
181
name: string; from the config file, used in log messages
182
fingerprint: string (40 or 32 hexadecimal digits); used to
183
uniquely identify the client
184
secret: bytestring; sent verbatim (over TLS) to client
185
host: string; available for use by the checker command
186
created: datetime.datetime(); (UTC) object creation
187
last_enabled: datetime.datetime(); (UTC)
188
enabled: bool()
189
last_checked_ok: datetime.datetime(); (UTC) or None
190
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
192
interval: datetime.timedelta(); How often to start a new checker
193
disable_hook: If set, called by disable() as disable_hook(self)
296
194
checker: subprocess.Popen(); a running checker process used
297
195
to see if the client lives.
298
196
'None' if no process is running.
299
checker_callback_tag: a gobject event source tag, or None
300
checker_command: string; External command which is run to check
301
if client lives. %() expansions are done at
197
checker_initiator_tag: a gobject event source tag, or None
198
disable_initiator_tag: - '' -
199
checker_callback_tag: - '' -
200
checker_command: string; External command which is run to check if
201
client lives. %() expansions are done at
302
202
runtime with vars(self) as dict, so that for
303
203
instance %(name)s can be used in the command.
304
checker_initiator_tag: a gobject event source tag, or None
305
created: datetime.datetime(); (UTC) object creation
306
client_structure: Object describing what attributes a client has
307
and is used for storing the client at exit
308
current_checker_command: string; current running checker_command
309
disable_initiator_tag: a gobject event source tag, or None
310
enabled: bool()
311
fingerprint: string (40 or 32 hexadecimal digits); used to
312
uniquely identify the client
313
host: string; available for use by the checker command
314
interval: datetime.timedelta(); How often to start a new checker
315
last_approval_request: datetime.datetime(); (UTC) or None
316
last_checked_ok: datetime.datetime(); (UTC) or None
317
last_checker_status: integer between 0 and 255 reflecting exit status
318
of last checker. -1 reflect crashed checker,
319
or None.
320
last_enabled: datetime.datetime(); (UTC)
321
name: string; from the config file, used in log messages and
322
D-Bus identifiers
323
secret: bytestring; sent verbatim (over TLS) to client
324
timeout: datetime.timedelta(); How long from last_checked_ok
325
until this client is disabled
326
extended_timeout: extra long timeout when password has been sent
327
runtime_expansions: Allowed attributes for runtime expansion.
328
expires: datetime.datetime(); time (UTC) when a client will be
329
disabled, or None
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
330
206
"""
331
332
runtime_expansions = ("approval_delay", "approval_duration",
333
"created", "enabled", "fingerprint",
334
"host", "interval", "last_checked_ok",
335
"last_enabled", "name", "timeout")
336
337
207
def timeout_milliseconds(self):
338
208
"Return the 'timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.timeout)
340
341
def extended_timeout_milliseconds(self):
342
"Return the 'extended_timeout' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.extended_timeout)
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (self.timeout.microseconds // 1000))
344
212
345
213
def interval_milliseconds(self):
346
214
"Return the 'interval' attribute in milliseconds"
347
return _timedelta_to_milliseconds(self.interval)
348
349
def approval_delay_milliseconds(self):
350
return _timedelta_to_milliseconds(self.approval_delay)
351
352
def __init__(self, name = None, config=None):
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
218
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
353
221
"""Note: the 'checker' key in 'config' sets the
354
222
'checker_command' attribute and *not* the 'checker'
355
223
attribute."""
356
224
self.name = name
357
225
if config is None:
358
226
config = {}
359
logger.debug("Creating client %r", self.name)
227
logger.debug(u"Creating client %r", self.name)
228
self.use_dbus = use_dbus
229
if self.use_dbus:
230
self.dbus_object_path = (dbus.ObjectPath
231
("/Mandos/clients/"
232
+ self.name.replace(".", "_")))
233
dbus.service.Object.__init__(self, bus,
234
self.dbus_object_path)
360
235
# Uppercase and remove spaces from fingerprint for later
361
236
# comparison purposes with return value from the fingerprint()
362
237
# function
363
238
self.fingerprint = (config["fingerprint"].upper()
364
.replace(" ", ""))
365
logger.debug(" Fingerprint: %s", self.fingerprint)
239
.replace(u" ", u""))
240
logger.debug(u" Fingerprint: %s", self.fingerprint)
366
241
if "secret" in config:
367
self.secret = config["secret"].decode("base64")
242
self.secret = config["secret"].decode(u"base64")
368
243
elif "secfile" in config:
369
with open(os.path.expanduser(os.path.expandvars
370
(config["secfile"])),
371
"rb") as secfile:
244
with closing(open(os.path.expanduser
245
(os.path.expandvars
246
(config["secfile"])))) as secfile:
372
247
self.secret = secfile.read()
373
248
else:
374
raise TypeError("No secret or secfile for client %s"
249
raise TypeError(u"No secret or secfile for client %s"
375
250
% self.name)
376
251
self.host = config.get("host", "")
377
252
self.created = datetime.datetime.utcnow()
378
self.enabled = True
379
self.last_approval_request = None
380
self.last_enabled = datetime.datetime.utcnow()
253
self.enabled = False
254
self.last_enabled = None
381
255
self.last_checked_ok = None
382
self.last_checker_status = None
383
256
self.timeout = string_to_delta(config["timeout"])
384
self.extended_timeout = string_to_delta(config
385
["extended_timeout"])
386
257
self.interval = string_to_delta(config["interval"])
258
self.disable_hook = disable_hook
387
259
self.checker = None
388
260
self.checker_initiator_tag = None
389
261
self.disable_initiator_tag = None
390
self.expires = datetime.datetime.utcnow() + self.timeout
391
262
self.checker_callback_tag = None
392
263
self.checker_command = config["checker"]
393
self.current_checker_command = None
394
self._approved = None
395
self.approved_by_default = config.get("approved_by_default",
396
True)
397
self.approvals_pending = 0
398
self.approval_delay = string_to_delta(
399
config["approval_delay"])
400
self.approval_duration = string_to_delta(
401
config["approval_duration"])
402
self.changedstate = (multiprocessing_manager
403
.Condition(multiprocessing_manager
404
.Lock()))
405
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
406
self.client_structure.append("client_structure")
407
408
409
for name, t in inspect.getmembers(type(self),
410
lambda obj: isinstance(obj, property)):
411
if not name.startswith("_"):
412
self.client_structure.append(name)
413
414
# Send notice to process children that client state has changed
415
def send_changedstate(self):
416
with self.changedstate:
417
self.changedstate.notify_all()
418
264
419
265
def enable(self):
420
266
"""Start this client's checker and timeout hooks"""
421
if getattr(self, "enabled", False):
422
# Already enabled
423
return
424
self.send_changedstate()
425
self.expires = datetime.datetime.utcnow() + self.timeout
267
self.last_enabled = datetime.datetime.utcnow()
268
# Schedule a new checker to be started an 'interval' from now,
269
# and every interval from then on.
270
self.checker_initiator_tag = (gobject.timeout_add
271
(self.interval_milliseconds(),
272
self.start_checker))
273
# Also start a new checker *right now*.
274
self.start_checker()
275
# Schedule a disable() when 'timeout' has passed
276
self.disable_initiator_tag = (gobject.timeout_add
277
(self.timeout_milliseconds(),
278
self.disable))
426
279
self.enabled = True
427
self.last_enabled = datetime.datetime.utcnow()
428
self.init_checker()
280
if self.use_dbus:
281
# Emit D-Bus signals
282
self.PropertyChanged(dbus.String(u"enabled"),
283
dbus.Boolean(True, variant_level=1))
284
self.PropertyChanged(dbus.String(u"last_enabled"),
285
(_datetime_to_dbus(self.last_enabled,
286
variant_level=1)))
429
287
430
def disable(self, quiet=True):
288
def disable(self):
431
289
"""Disable this client."""
432
290
if not getattr(self, "enabled", False):
433
291
return False
434
if not quiet:
435
self.send_changedstate()
436
if not quiet:
437
logger.info("Disabling client %s", self.name)
292
logger.info(u"Disabling client %s", self.name)
438
293
if getattr(self, "disable_initiator_tag", False):
439
294
gobject.source_remove(self.disable_initiator_tag)
440
295
self.disable_initiator_tag = None
441
self.expires = None
442
296
if getattr(self, "checker_initiator_tag", False):
443
297
gobject.source_remove(self.checker_initiator_tag)
444
298
self.checker_initiator_tag = None
445
299
self.stop_checker()
300
if self.disable_hook:
301
self.disable_hook(self)
446
302
self.enabled = False
303
if self.use_dbus:
304
# Emit D-Bus signal
305
self.PropertyChanged(dbus.String(u"enabled"),
306
dbus.Boolean(False, variant_level=1))
447
307
# Do not run this again if called by a gobject.timeout_add
448
308
return False
449
309
450
310
def __del__(self):
311
self.disable_hook = None
451
312
self.disable()
452
453
def init_checker(self):
454
# Schedule a new checker to be started an 'interval' from now,
455
# and every interval from then on.
456
self.checker_initiator_tag = (gobject.timeout_add
457
(self.interval_milliseconds(),
458
self.start_checker))
459
# Schedule a disable() when 'timeout' has passed
460
self.disable_initiator_tag = (gobject.timeout_add
461
(self.timeout_milliseconds(),
462
self.disable))
463
# Also start a new checker *right now*.
464
self.start_checker()
465
466
313
467
314
def checker_callback(self, pid, condition, command):
468
315
"""The checker has completed, so take appropriate actions."""
469
316
self.checker_callback_tag = None
470
317
self.checker = None
471
if os.WIFEXITED(condition):
472
self.last_checker_status = os.WEXITSTATUS(condition)
473
if self.last_checker_status == 0:
474
logger.info("Checker for %(name)s succeeded",
475
vars(self))
476
self.checked_ok()
477
else:
478
logger.info("Checker for %(name)s failed",
479
vars(self))
480
else:
481
self.last_checker_status = -1
482
logger.warning("Checker for %(name)s crashed?",
318
if self.use_dbus:
319
# Emit D-Bus signal
320
self.PropertyChanged(dbus.String(u"checker_running"),
321
dbus.Boolean(False, variant_level=1))
322
if (os.WIFEXITED(condition)
323
and (os.WEXITSTATUS(condition) == 0)):
324
logger.info(u"Checker for %(name)s succeeded",
325
vars(self))
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.CheckerCompleted(dbus.Boolean(True),
329
dbus.UInt16(condition),
330
dbus.String(command))
331
self.bump_timeout()
332
elif not os.WIFEXITED(condition):
333
logger.warning(u"Checker for %(name)s crashed?",
483
334
vars(self))
335
if self.use_dbus:
336
# Emit D-Bus signal
337
self.CheckerCompleted(dbus.Boolean(False),
338
dbus.UInt16(condition),
339
dbus.String(command))
340
else:
341
logger.info(u"Checker for %(name)s failed",
342
vars(self))
343
if self.use_dbus:
344
# Emit D-Bus signal
345
self.CheckerCompleted(dbus.Boolean(False),
346
dbus.UInt16(condition),
347
dbus.String(command))
484
348
485
def checked_ok(self, timeout=None):
349
def bump_timeout(self):
486
350
"""Bump up the timeout for this client.
487
488
351
This should only be called when the client has been seen,
489
352
alive and well.
490
353
"""
491
if timeout is None:
492
timeout = self.timeout
493
354
self.last_checked_ok = datetime.datetime.utcnow()
494
if self.disable_initiator_tag is not None:
495
gobject.source_remove(self.disable_initiator_tag)
496
if getattr(self, "enabled", False):
497
self.disable_initiator_tag = (gobject.timeout_add
498
(_timedelta_to_milliseconds
499
(timeout), self.disable))
500
self.expires = datetime.datetime.utcnow() + timeout
501
502
def need_approval(self):
503
self.last_approval_request = datetime.datetime.utcnow()
355
gobject.source_remove(self.disable_initiator_tag)
356
self.disable_initiator_tag = (gobject.timeout_add
357
(self.timeout_milliseconds(),
358
self.disable))
359
if self.use_dbus:
360
# Emit D-Bus signal
361
self.PropertyChanged(
362
dbus.String(u"last_checked_ok"),
363
(_datetime_to_dbus(self.last_checked_ok,
364
variant_level=1)))
504
365
505
366
def start_checker(self):
506
367
"""Start a new checker subprocess if one is not running.
507
508
368
If a checker already exists, leave it running and do
509
369
nothing."""
510
370
# The reason for not killing a running checker is that if we
513
373
# client would inevitably timeout, since no checker would get
514
374
# a chance to run to completion. If we instead leave running
515
375
# checkers alone, the checker would have to take more time
516
# than 'timeout' for the client to be disabled, which is as it
517
# should be.
518
519
# If a checker exists, make sure it is not a zombie
520
try:
521
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
522
except (AttributeError, OSError) as error:
523
if (isinstance(error, OSError)
524
and error.errno != errno.ECHILD):
525
raise error
526
else:
527
if pid:
528
logger.warning("Checker was a zombie")
529
gobject.source_remove(self.checker_callback_tag)
530
self.checker_callback(pid, status,
531
self.current_checker_command)
532
# Start a new checker if needed
376
# than 'timeout' for the client to be declared invalid, which
377
# is as it should be.
533
378
if self.checker is None:
534
379
try:
535
380
# In case checker_command has exactly one % operator
536
381
command = self.checker_command % self.host
537
382
except TypeError:
538
383
# Escape attributes for the shell
539
escaped_attrs = dict(
540
(attr,
541
re.escape(unicode(str(getattr(self, attr, "")),
542
errors=
543
'replace')))
544
for attr in
545
self.runtime_expansions)
546
384
escaped_attrs = dict((key, re.escape(str(val)))
385
for key, val in
386
vars(self).iteritems())
547
387
try:
548
388
command = self.checker_command % escaped_attrs
549
except TypeError as error:
550
logger.error('Could not format string "%s":'
551
' %s', self.checker_command, error)
389
except TypeError, error:
390
logger.error(u'Could not format string "%s":'
391
u' %s', self.checker_command, error)
552
392
return True # Try again later
553
self.current_checker_command = command
554
393
try:
555
logger.info("Starting checker %r for %s",
394
logger.info(u"Starting checker %r for %s",
556
395
command, self.name)
557
396
# We don't need to redirect stdout and stderr, since
558
397
# in normal mode, that is already done by daemon(),
561
400
self.checker = subprocess.Popen(command,
562
401
close_fds=True,
563
402
shell=True, cwd="/")
403
if self.use_dbus:
404
# Emit D-Bus signal
405
self.CheckerStarted(command)
406
self.PropertyChanged(
407
dbus.String("checker_running"),
408
dbus.Boolean(True, variant_level=1))
564
409
self.checker_callback_tag = (gobject.child_watch_add
565
410
(self.checker.pid,
566
411
self.checker_callback,
567
412
data=command))
568
# The checker may have completed before the gobject
569
# watch was added. Check for this.
570
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
571
if pid:
572
gobject.source_remove(self.checker_callback_tag)
573
self.checker_callback(pid, status, command)
574
except OSError as error:
575
logger.error("Failed to start subprocess: %s",
413
except OSError, error:
414
logger.error(u"Failed to start subprocess: %s",
576
415
error)
577
416
# Re-run this periodically if run by gobject.timeout_add
578
417
return True
584
423
self.checker_callback_tag = None
585
424
if getattr(self, "checker", None) is None:
586
425
return
587
logger.debug("Stopping checker for %(name)s", vars(self))
426
logger.debug(u"Stopping checker for %(name)s", vars(self))
588
427
try:
589
428
os.kill(self.checker.pid, signal.SIGTERM)
590
#time.sleep(0.5)
429
#os.sleep(0.5)
591
430
#if self.checker.poll() is None:
592
431
# os.kill(self.checker.pid, signal.SIGKILL)
593
except OSError as error:
432
except OSError, error:
594
433
if error.errno != errno.ESRCH: # No such process
595
434
raise
596
435
self.checker = None
597
598
# Encrypts a client secret and stores it in a varible encrypted_secret
599
def encrypt_secret(self, key):
600
# Encryption-key need to be of a specific size, so we hash inputed key
601
hasheng = hashlib.sha256()
602
hasheng.update(key)
603
encryptionkey = hasheng.digest()
604
605
# Create validation hash so we know at decryption if it was sucessful
606
hasheng = hashlib.sha256()
607
hasheng.update(self.secret)
608
validationhash = hasheng.digest()
609
610
# Encrypt secret
611
iv = os.urandom(Crypto.Cipher.AES.block_size)
612
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
613
Crypto.Cipher.AES.MODE_CFB, iv)
614
ciphertext = ciphereng.encrypt(validationhash+self.secret)
615
self.encrypted_secret = (ciphertext, iv)
616
617
# Decrypt a encrypted client secret
618
def decrypt_secret(self, key):
619
# Decryption-key need to be of a specific size, so we hash inputed key
620
hasheng = hashlib.sha256()
621
hasheng.update(key)
622
encryptionkey = hasheng.digest()
623
624
# Decrypt encrypted secret
625
ciphertext, iv = self.encrypted_secret
626
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
627
Crypto.Cipher.AES.MODE_CFB, iv)
628
plain = ciphereng.decrypt(ciphertext)
629
630
# Validate decrypted secret to know if it was succesful
631
hasheng = hashlib.sha256()
632
validationhash = plain[:hasheng.digest_size]
633
secret = plain[hasheng.digest_size:]
634
hasheng.update(secret)
635
636
# if validation fails, we use key as new secret. Otherwhise, we use
637
# the decrypted secret
638
if hasheng.digest() == validationhash:
639
self.secret = secret
640
else:
641
self.secret = key
642
del self.encrypted_secret
643
644
645
def dbus_service_property(dbus_interface, signature="v",
646
access="readwrite", byte_arrays=False):
647
"""Decorators for marking methods of a DBusObjectWithProperties to
648
become properties on the D-Bus.
649
650
The decorated method will be called with no arguments by "Get"
651
and with one argument by "Set".
652
653
The parameters, where they are supported, are the same as
654
dbus.service.method, except there is only "signature", since the
655
type from Get() and the type sent to Set() is the same.
656
"""
657
# Encoding deeply encoded byte arrays is not supported yet by the
658
# "Set" method, so we fail early here:
659
if byte_arrays and signature != "ay":
660
raise ValueError("Byte arrays not supported for non-'ay'"
661
" signature %r" % signature)
662
def decorator(func):
663
func._dbus_is_property = True
664
func._dbus_interface = dbus_interface
665
func._dbus_signature = signature
666
func._dbus_access = access
667
func._dbus_name = func.__name__
668
if func._dbus_name.endswith("_dbus_property"):
669
func._dbus_name = func._dbus_name[:-14]
670
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
671
return func
672
return decorator
673
674
675
class DBusPropertyException(dbus.exceptions.DBusException):
676
"""A base class for D-Bus property-related exceptions
677
"""
678
def __unicode__(self):
679
return unicode(str(self))
680
681
682
class DBusPropertyAccessException(DBusPropertyException):
683
"""A property's access permissions disallows an operation.
684
"""
685
pass
686
687
688
class DBusPropertyNotFound(DBusPropertyException):
689
"""An attempt was made to access a non-existing property.
690
"""
691
pass
692
693
694
class DBusObjectWithProperties(dbus.service.Object):
695
"""A D-Bus object with properties.
696
697
Classes inheriting from this can use the dbus_service_property
698
decorator to expose methods as D-Bus properties. It exposes the
699
standard Get(), Set(), and GetAll() methods on the D-Bus.
700
"""
701
702
@staticmethod
703
def _is_dbus_property(obj):
704
return getattr(obj, "_dbus_is_property", False)
705
706
def _get_all_dbus_properties(self):
707
"""Returns a generator of (name, attribute) pairs
708
"""
709
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
710
for cls in self.__class__.__mro__
711
for name, prop in
712
inspect.getmembers(cls, self._is_dbus_property))
713
714
def _get_dbus_property(self, interface_name, property_name):
715
"""Returns a bound method if one exists which is a D-Bus
716
property with the specified name and interface.
717
"""
718
for cls in self.__class__.__mro__:
719
for name, value in (inspect.getmembers
720
(cls, self._is_dbus_property)):
721
if (value._dbus_name == property_name
722
and value._dbus_interface == interface_name):
723
return value.__get__(self)
724
725
# No such property
726
raise DBusPropertyNotFound(self.dbus_object_path + ":"
727
+ interface_name + "."
728
+ property_name)
729
730
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
731
out_signature="v")
732
def Get(self, interface_name, property_name):
733
"""Standard D-Bus property Get() method, see D-Bus standard.
734
"""
735
prop = self._get_dbus_property(interface_name, property_name)
736
if prop._dbus_access == "write":
737
raise DBusPropertyAccessException(property_name)
738
value = prop()
739
if not hasattr(value, "variant_level"):
740
return value
741
return type(value)(value, variant_level=value.variant_level+1)
742
743
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
744
def Set(self, interface_name, property_name, value):
745
"""Standard D-Bus property Set() method, see D-Bus standard.
746
"""
747
prop = self._get_dbus_property(interface_name, property_name)
748
if prop._dbus_access == "read":
749
raise DBusPropertyAccessException(property_name)
750
if prop._dbus_get_args_options["byte_arrays"]:
751
# The byte_arrays option is not supported yet on
752
# signatures other than "ay".
753
if prop._dbus_signature != "ay":
754
raise ValueError
755
value = dbus.ByteArray(''.join(unichr(byte)
756
for byte in value))
757
prop(value)
758
759
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
760
out_signature="a{sv}")
761
def GetAll(self, interface_name):
762
"""Standard D-Bus property GetAll() method, see D-Bus
763
standard.
764
765
Note: Will not include properties with access="write".
766
"""
767
all = {}
768
for name, prop in self._get_all_dbus_properties():
769
if (interface_name
770
and interface_name != prop._dbus_interface):
771
# Interface non-empty but did not match
772
continue
773
# Ignore write-only properties
774
if prop._dbus_access == "write":
775
continue
776
value = prop()
777
if not hasattr(value, "variant_level"):
778
all[name] = value
779
continue
780
all[name] = type(value)(value, variant_level=
781
value.variant_level+1)
782
return dbus.Dictionary(all, signature="sv")
783
784
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
785
out_signature="s",
786
path_keyword='object_path',
787
connection_keyword='connection')
788
def Introspect(self, object_path, connection):
789
"""Standard D-Bus method, overloaded to insert property tags.
790
"""
791
xmlstring = dbus.service.Object.Introspect(self, object_path,
792
connection)
793
try:
794
document = xml.dom.minidom.parseString(xmlstring)
795
def make_tag(document, name, prop):
796
e = document.createElement("property")
797
e.setAttribute("name", name)
798
e.setAttribute("type", prop._dbus_signature)
799
e.setAttribute("access", prop._dbus_access)
800
return e
801
for if_tag in document.getElementsByTagName("interface"):
802
for tag in (make_tag(document, name, prop)
803
for name, prop
804
in self._get_all_dbus_properties()
805
if prop._dbus_interface
806
== if_tag.getAttribute("name")):
807
if_tag.appendChild(tag)
808
# Add the names to the return values for the
809
# "org.freedesktop.DBus.Properties" methods
810
if (if_tag.getAttribute("name")
811
== "org.freedesktop.DBus.Properties"):
812
for cn in if_tag.getElementsByTagName("method"):
813
if cn.getAttribute("name") == "Get":
814
for arg in cn.getElementsByTagName("arg"):
815
if (arg.getAttribute("direction")
816
== "out"):
817
arg.setAttribute("name", "value")
818
elif cn.getAttribute("name") == "GetAll":
819
for arg in cn.getElementsByTagName("arg"):
820
if (arg.getAttribute("direction")
821
== "out"):
822
arg.setAttribute("name", "props")
823
xmlstring = document.toxml("utf-8")
824
document.unlink()
825
except (AttributeError, xml.dom.DOMException,
826
xml.parsers.expat.ExpatError) as error:
827
logger.error("Failed to override Introspection method",
828
error)
829
return xmlstring
830
831
832
def datetime_to_dbus (dt, variant_level=0):
833
"""Convert a UTC datetime.datetime() to a D-Bus type."""
834
if dt is None:
835
return dbus.String("", variant_level = variant_level)
836
return dbus.String(dt.isoformat(),
837
variant_level=variant_level)
838
839
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
840
.__metaclass__):
841
"""Applied to an empty subclass of a D-Bus object, this metaclass
842
will add additional D-Bus attributes matching a certain pattern.
843
"""
844
def __new__(mcs, name, bases, attr):
845
# Go through all the base classes which could have D-Bus
846
# methods, signals, or properties in them
847
for base in (b for b in bases
848
if issubclass(b, dbus.service.Object)):
849
# Go though all attributes of the base class
850
for attrname, attribute in inspect.getmembers(base):
851
# Ignore non-D-Bus attributes, and D-Bus attributes
852
# with the wrong interface name
853
if (not hasattr(attribute, "_dbus_interface")
854
or not attribute._dbus_interface
855
.startswith("se.recompile.Mandos")):
856
continue
857
# Create an alternate D-Bus interface name based on
858
# the current name
859
alt_interface = (attribute._dbus_interface
860
.replace("se.recompile.Mandos",
861
"se.bsnet.fukt.Mandos"))
862
# Is this a D-Bus signal?
863
if getattr(attribute, "_dbus_is_signal", False):
864
# Extract the original non-method function by
865
# black magic
866
nonmethod_func = (dict(
867
zip(attribute.func_code.co_freevars,
868
attribute.__closure__))["func"]
869
.cell_contents)
870
# Create a new, but exactly alike, function
871
# object, and decorate it to be a new D-Bus signal
872
# with the alternate D-Bus interface name
873
new_function = (dbus.service.signal
874
(alt_interface,
875
attribute._dbus_signature)
876
(types.FunctionType(
877
nonmethod_func.func_code,
878
nonmethod_func.func_globals,
879
nonmethod_func.func_name,
880
nonmethod_func.func_defaults,
881
nonmethod_func.func_closure)))
882
# Define a creator of a function to call both the
883
# old and new functions, so both the old and new
884
# signals gets sent when the function is called
885
def fixscope(func1, func2):
886
"""This function is a scope container to pass
887
func1 and func2 to the "call_both" function
888
outside of its arguments"""
889
def call_both(*args, **kwargs):
890
"""This function will emit two D-Bus
891
signals by calling func1 and func2"""
892
func1(*args, **kwargs)
893
func2(*args, **kwargs)
894
return call_both
895
# Create the "call_both" function and add it to
896
# the class
897
attr[attrname] = fixscope(attribute,
898
new_function)
899
# Is this a D-Bus method?
900
elif getattr(attribute, "_dbus_is_method", False):
901
# Create a new, but exactly alike, function
902
# object. Decorate it to be a new D-Bus method
903
# with the alternate D-Bus interface name. Add it
904
# to the class.
905
attr[attrname] = (dbus.service.method
906
(alt_interface,
907
attribute._dbus_in_signature,
908
attribute._dbus_out_signature)
909
(types.FunctionType
910
(attribute.func_code,
911
attribute.func_globals,
912
attribute.func_name,
913
attribute.func_defaults,
914
attribute.func_closure)))
915
# Is this a D-Bus property?
916
elif getattr(attribute, "_dbus_is_property", False):
917
# Create a new, but exactly alike, function
918
# object, and decorate it to be a new D-Bus
919
# property with the alternate D-Bus interface
920
# name. Add it to the class.
921
attr[attrname] = (dbus_service_property
922
(alt_interface,
923
attribute._dbus_signature,
924
attribute._dbus_access,
925
attribute
926
._dbus_get_args_options
927
["byte_arrays"])
928
(types.FunctionType
929
(attribute.func_code,
930
attribute.func_globals,
931
attribute.func_name,
932
attribute.func_defaults,
933
attribute.func_closure)))
934
return type.__new__(mcs, name, bases, attr)
935
936
class ClientDBus(Client, DBusObjectWithProperties):
937
"""A Client class using D-Bus
938
939
Attributes:
940
dbus_object_path: dbus.ObjectPath
941
bus: dbus.SystemBus()
942
"""
943
944
runtime_expansions = (Client.runtime_expansions
945
+ ("dbus_object_path",))
946
947
# dbus.service.Object doesn't use super(), so we can't either.
948
949
def __init__(self, bus = None, *args, **kwargs):
950
self.bus = bus
951
Client.__init__(self, *args, **kwargs)
952
953
self._approvals_pending = 0
954
# Only now, when this client is initialized, can it show up on
955
# the D-Bus
956
client_object_name = unicode(self.name).translate(
957
{ord("."): ord("_"),
958
ord("-"): ord("_")})
959
self.dbus_object_path = (dbus.ObjectPath
960
("/clients/" + client_object_name))
961
DBusObjectWithProperties.__init__(self, self.bus,
962
self.dbus_object_path)
963
964
def notifychangeproperty(transform_func,
965
dbus_name, type_func=lambda x: x,
966
variant_level=1):
967
""" Modify a variable so that it's a property which announces
968
its changes to DBus.
969
970
transform_fun: Function that takes a value and a variant_level
971
and transforms it to a D-Bus type.
972
dbus_name: D-Bus name of the variable
973
type_func: Function that transform the value before sending it
974
to the D-Bus. Default: no transform
975
variant_level: D-Bus variant level. Default: 1
976
"""
977
attrname = "_{0}".format(dbus_name)
978
def setter(self, value):
979
if hasattr(self, "dbus_object_path"):
980
if (not hasattr(self, attrname) or
981
type_func(getattr(self, attrname, None))
982
!= type_func(value)):
983
dbus_value = transform_func(type_func(value),
984
variant_level
985
=variant_level)
986
self.PropertyChanged(dbus.String(dbus_name),
987
dbus_value)
988
setattr(self, attrname, value)
989
990
return property(lambda self: getattr(self, attrname), setter)
991
992
993
expires = notifychangeproperty(datetime_to_dbus, "Expires")
994
approvals_pending = notifychangeproperty(dbus.Boolean,
995
"ApprovalPending",
996
type_func = bool)
997
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
998
last_enabled = notifychangeproperty(datetime_to_dbus,
999
"LastEnabled")
1000
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1001
type_func = lambda checker:
1002
checker is not None)
1003
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1004
"LastCheckedOK")
1005
last_approval_request = notifychangeproperty(
1006
datetime_to_dbus, "LastApprovalRequest")
1007
approved_by_default = notifychangeproperty(dbus.Boolean,
1008
"ApprovedByDefault")
1009
approval_delay = notifychangeproperty(dbus.UInt16,
1010
"ApprovalDelay",
1011
type_func =
1012
_timedelta_to_milliseconds)
1013
approval_duration = notifychangeproperty(
1014
dbus.UInt16, "ApprovalDuration",
1015
type_func = _timedelta_to_milliseconds)
1016
host = notifychangeproperty(dbus.String, "Host")
1017
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1018
type_func =
1019
_timedelta_to_milliseconds)
1020
extended_timeout = notifychangeproperty(
1021
dbus.UInt16, "ExtendedTimeout",
1022
type_func = _timedelta_to_milliseconds)
1023
interval = notifychangeproperty(dbus.UInt16,
1024
"Interval",
1025
type_func =
1026
_timedelta_to_milliseconds)
1027
checker_command = notifychangeproperty(dbus.String, "Checker")
1028
1029
del notifychangeproperty
1030
1031
def __del__(self, *args, **kwargs):
1032
try:
1033
self.remove_from_connection()
1034
except LookupError:
1035
pass
1036
if hasattr(DBusObjectWithProperties, "__del__"):
1037
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1038
Client.__del__(self, *args, **kwargs)
1039
1040
def checker_callback(self, pid, condition, command,
1041
*args, **kwargs):
1042
self.checker_callback_tag = None
1043
self.checker = None
1044
if os.WIFEXITED(condition):
1045
exitstatus = os.WEXITSTATUS(condition)
1046
# Emit D-Bus signal
1047
self.CheckerCompleted(dbus.Int16(exitstatus),
1048
dbus.Int64(condition),
1049
dbus.String(command))
1050
else:
1051
# Emit D-Bus signal
1052
self.CheckerCompleted(dbus.Int16(-1),
1053
dbus.Int64(condition),
1054
dbus.String(command))
1055
1056
return Client.checker_callback(self, pid, condition, command,
1057
*args, **kwargs)
1058
1059
def start_checker(self, *args, **kwargs):
1060
old_checker = self.checker
1061
if self.checker is not None:
1062
old_checker_pid = self.checker.pid
1063
else:
1064
old_checker_pid = None
1065
r = Client.start_checker(self, *args, **kwargs)
1066
# Only if new checker process was started
1067
if (self.checker is not None
1068
and old_checker_pid != self.checker.pid):
1069
# Emit D-Bus signal
1070
self.CheckerStarted(self.current_checker_command)
1071
return r
1072
1073
def _reset_approved(self):
1074
self._approved = None
1075
return False
1076
1077
def approve(self, value=True):
1078
self.send_changedstate()
1079
self._approved = value
1080
gobject.timeout_add(_timedelta_to_milliseconds
1081
(self.approval_duration),
1082
self._reset_approved)
1083
1084
1085
## D-Bus methods, signals & properties
1086
_interface = "se.recompile.Mandos.Client"
1087
1088
## Signals
436
if self.use_dbus:
437
self.PropertyChanged(dbus.String(u"checker_running"),
438
dbus.Boolean(False, variant_level=1))
439
440
def still_valid(self):
441
"""Has the timeout not yet passed for this client?"""
442
if not getattr(self, "enabled", False):
443
return False
444
now = datetime.datetime.utcnow()
445
if self.last_checked_ok is None:
446
return now < (self.created + self.timeout)
447
else:
448
return now < (self.last_checked_ok + self.timeout)
449
450
## D-Bus methods & signals
451
_interface = u"org.mandos_system.Mandos.Client"
452
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
1089
456
1090
457
# CheckerCompleted - signal
1091
@dbus.service.signal(_interface, signature="nxs")
1092
def CheckerCompleted(self, exitcode, waitstatus, command):
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
1093
460
"D-Bus signal"
1094
461
pass
1095
462
1099
466
"D-Bus signal"
1100
467
pass
1101
468
469
# GetAllProperties - method
470
@dbus.service.method(_interface, out_signature="a{sv}")
471
def GetAllProperties(self):
472
"D-Bus method"
473
return dbus.Dictionary({
474
dbus.String("name"):
475
dbus.String(self.name, variant_level=1),
476
dbus.String("fingerprint"):
477
dbus.String(self.fingerprint, variant_level=1),
478
dbus.String("host"):
479
dbus.String(self.host, variant_level=1),
480
dbus.String("created"):
481
_datetime_to_dbus(self.created, variant_level=1),
482
dbus.String("last_enabled"):
483
(_datetime_to_dbus(self.last_enabled,
484
variant_level=1)
485
if self.last_enabled is not None
486
else dbus.Boolean(False, variant_level=1)),
487
dbus.String("enabled"):
488
dbus.Boolean(self.enabled, variant_level=1),
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
492
if self.last_checked_ok is not None
493
else dbus.Boolean (False, variant_level=1)),
494
dbus.String("timeout"):
495
dbus.UInt64(self.timeout_milliseconds(),
496
variant_level=1),
497
dbus.String("interval"):
498
dbus.UInt64(self.interval_milliseconds(),
499
variant_level=1),
500
dbus.String("checker"):
501
dbus.String(self.checker_command,
502
variant_level=1),
503
dbus.String("checker_running"):
504
dbus.Boolean(self.checker is not None,
505
variant_level=1),
506
}, signature="sv")
507
508
# IsStillValid - method
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
512
1102
513
# PropertyChanged - signal
1103
514
@dbus.service.signal(_interface, signature="sv")
1104
515
def PropertyChanged(self, property, value):
1105
516
"D-Bus signal"
1106
517
pass
1107
518
1108
# GotSecret - signal
1109
@dbus.service.signal(_interface)
1110
def GotSecret(self):
1111
"""D-Bus signal
1112
Is sent after a successful transfer of secret from the Mandos
1113
server to mandos-client
1114
"""
1115
pass
1116
1117
# Rejected - signal
1118
@dbus.service.signal(_interface, signature="s")
1119
def Rejected(self, reason):
1120
"D-Bus signal"
1121
pass
1122
1123
# NeedApproval - signal
1124
@dbus.service.signal(_interface, signature="tb")
1125
def NeedApproval(self, timeout, default):
1126
"D-Bus signal"
1127
return self.need_approval()
1128
1129
# NeRwequest - signal
1130
@dbus.service.signal(_interface, signature="s")
1131
def NewRequest(self, ip):
1132
"""D-Bus signal
1133
Is sent after a client request a password.
1134
"""
1135
pass
1136
1137
## Methods
1138
1139
# Approve - method
1140
@dbus.service.method(_interface, in_signature="b")
1141
def Approve(self, value):
1142
self.approve(value)
1143
1144
# CheckedOK - method
1145
@dbus.service.method(_interface)
1146
def CheckedOK(self):
1147
self.checked_ok()
519
# SetChecker - method
520
@dbus.service.method(_interface, in_signature="s")
521
def SetChecker(self, checker):
522
"D-Bus setter method"
523
self.checker_command = checker
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"checker"),
526
dbus.String(self.checker_command,
527
variant_level=1))
528
529
# SetHost - method
530
@dbus.service.method(_interface, in_signature="s")
531
def SetHost(self, host):
532
"D-Bus setter method"
533
self.host = host
534
# Emit D-Bus signal
535
self.PropertyChanged(dbus.String(u"host"),
536
dbus.String(self.host, variant_level=1))
537
538
# SetInterval - method
539
@dbus.service.method(_interface, in_signature="t")
540
def SetInterval(self, milliseconds):
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"interval"),
544
(dbus.UInt64(self.interval_milliseconds(),
545
variant_level=1)))
546
547
# SetSecret - method
548
@dbus.service.method(_interface, in_signature="ay",
549
byte_arrays=True)
550
def SetSecret(self, secret):
551
"D-Bus setter method"
552
self.secret = str(secret)
553
554
# SetTimeout - method
555
@dbus.service.method(_interface, in_signature="t")
556
def SetTimeout(self, milliseconds):
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
558
# Emit D-Bus signal
559
self.PropertyChanged(dbus.String(u"timeout"),
560
(dbus.UInt64(self.timeout_milliseconds(),
561
variant_level=1)))
1148
562
1149
563
# Enable - method
1150
@dbus.service.method(_interface)
1151
def Enable(self):
1152
"D-Bus method"
1153
self.enable()
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
1154
566
1155
567
# StartChecker - method
1156
568
@dbus.service.method(_interface)
1165
577
self.disable()
1166
578
1167
579
# StopChecker - method
1168
@dbus.service.method(_interface)
1169
def StopChecker(self):
1170
self.stop_checker()
1171
1172
## Properties
1173
1174
# ApprovalPending - property
1175
@dbus_service_property(_interface, signature="b", access="read")
1176
def ApprovalPending_dbus_property(self):
1177
return dbus.Boolean(bool(self.approvals_pending))
1178
1179
# ApprovedByDefault - property
1180
@dbus_service_property(_interface, signature="b",
1181
access="readwrite")
1182
def ApprovedByDefault_dbus_property(self, value=None):
1183
if value is None: # get
1184
return dbus.Boolean(self.approved_by_default)
1185
self.approved_by_default = bool(value)
1186
1187
# ApprovalDelay - property
1188
@dbus_service_property(_interface, signature="t",
1189
access="readwrite")
1190
def ApprovalDelay_dbus_property(self, value=None):
1191
if value is None: # get
1192
return dbus.UInt64(self.approval_delay_milliseconds())
1193
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1194
1195
# ApprovalDuration - property
1196
@dbus_service_property(_interface, signature="t",
1197
access="readwrite")
1198
def ApprovalDuration_dbus_property(self, value=None):
1199
if value is None: # get
1200
return dbus.UInt64(_timedelta_to_milliseconds(
1201
self.approval_duration))
1202
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1203
1204
# Name - property
1205
@dbus_service_property(_interface, signature="s", access="read")
1206
def Name_dbus_property(self):
1207
return dbus.String(self.name)
1208
1209
# Fingerprint - property
1210
@dbus_service_property(_interface, signature="s", access="read")
1211
def Fingerprint_dbus_property(self):
1212
return dbus.String(self.fingerprint)
1213
1214
# Host - property
1215
@dbus_service_property(_interface, signature="s",
1216
access="readwrite")
1217
def Host_dbus_property(self, value=None):
1218
if value is None: # get
1219
return dbus.String(self.host)
1220
self.host = value
1221
1222
# Created - property
1223
@dbus_service_property(_interface, signature="s", access="read")
1224
def Created_dbus_property(self):
1225
return dbus.String(datetime_to_dbus(self.created))
1226
1227
# LastEnabled - property
1228
@dbus_service_property(_interface, signature="s", access="read")
1229
def LastEnabled_dbus_property(self):
1230
return datetime_to_dbus(self.last_enabled)
1231
1232
# Enabled - property
1233
@dbus_service_property(_interface, signature="b",
1234
access="readwrite")
1235
def Enabled_dbus_property(self, value=None):
1236
if value is None: # get
1237
return dbus.Boolean(self.enabled)
1238
if value:
1239
self.enable()
1240
else:
1241
self.disable()
1242
1243
# LastCheckedOK - property
1244
@dbus_service_property(_interface, signature="s",
1245
access="readwrite")
1246
def LastCheckedOK_dbus_property(self, value=None):
1247
if value is not None:
1248
self.checked_ok()
1249
return
1250
return datetime_to_dbus(self.last_checked_ok)
1251
1252
# Expires - property
1253
@dbus_service_property(_interface, signature="s", access="read")
1254
def Expires_dbus_property(self):
1255
return datetime_to_dbus(self.expires)
1256
1257
# LastApprovalRequest - property
1258
@dbus_service_property(_interface, signature="s", access="read")
1259
def LastApprovalRequest_dbus_property(self):
1260
return datetime_to_dbus(self.last_approval_request)
1261
1262
# Timeout - property
1263
@dbus_service_property(_interface, signature="t",
1264
access="readwrite")
1265
def Timeout_dbus_property(self, value=None):
1266
if value is None: # get
1267
return dbus.UInt64(self.timeout_milliseconds())
1268
self.timeout = datetime.timedelta(0, 0, 0, value)
1269
if getattr(self, "disable_initiator_tag", None) is None:
1270
return
1271
# Reschedule timeout
1272
gobject.source_remove(self.disable_initiator_tag)
1273
self.disable_initiator_tag = None
1274
self.expires = None
1275
time_to_die = _timedelta_to_milliseconds((self
1276
.last_checked_ok
1277
+ self.timeout)
1278
- datetime.datetime
1279
.utcnow())
1280
if time_to_die <= 0:
1281
# The timeout has passed
1282
self.disable()
1283
else:
1284
self.expires = (datetime.datetime.utcnow()
1285
+ datetime.timedelta(milliseconds =
1286
time_to_die))
1287
self.disable_initiator_tag = (gobject.timeout_add
1288
(time_to_die, self.disable))
1289
1290
# ExtendedTimeout - property
1291
@dbus_service_property(_interface, signature="t",
1292
access="readwrite")
1293
def ExtendedTimeout_dbus_property(self, value=None):
1294
if value is None: # get
1295
return dbus.UInt64(self.extended_timeout_milliseconds())
1296
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1297
1298
# Interval - property
1299
@dbus_service_property(_interface, signature="t",
1300
access="readwrite")
1301
def Interval_dbus_property(self, value=None):
1302
if value is None: # get
1303
return dbus.UInt64(self.interval_milliseconds())
1304
self.interval = datetime.timedelta(0, 0, 0, value)
1305
if getattr(self, "checker_initiator_tag", None) is None:
1306
return
1307
# Reschedule checker run
1308
gobject.source_remove(self.checker_initiator_tag)
1309
self.checker_initiator_tag = (gobject.timeout_add
1310
(value, self.start_checker))
1311
self.start_checker() # Start one now, too
1312
1313
# Checker - property
1314
@dbus_service_property(_interface, signature="s",
1315
access="readwrite")
1316
def Checker_dbus_property(self, value=None):
1317
if value is None: # get
1318
return dbus.String(self.checker_command)
1319
self.checker_command = value
1320
1321
# CheckerRunning - property
1322
@dbus_service_property(_interface, signature="b",
1323
access="readwrite")
1324
def CheckerRunning_dbus_property(self, value=None):
1325
if value is None: # get
1326
return dbus.Boolean(self.checker is not None)
1327
if value:
1328
self.start_checker()
1329
else:
1330
self.stop_checker()
1331
1332
# ObjectPath - property
1333
@dbus_service_property(_interface, signature="o", access="read")
1334
def ObjectPath_dbus_property(self):
1335
return self.dbus_object_path # is already a dbus.ObjectPath
1336
1337
# Secret = property
1338
@dbus_service_property(_interface, signature="ay",
1339
access="write", byte_arrays=True)
1340
def Secret_dbus_property(self, value):
1341
self.secret = str(value)
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
1342
582
1343
583
del _interface
1344
584
1345
585
1346
class ProxyClient(object):
1347
def __init__(self, child_pipe, fpr, address):
1348
self._pipe = child_pipe
1349
self._pipe.send(('init', fpr, address))
1350
if not self._pipe.recv():
1351
raise KeyError()
1352
1353
def __getattribute__(self, name):
1354
if(name == '_pipe'):
1355
return super(ProxyClient, self).__getattribute__(name)
1356
self._pipe.send(('getattr', name))
1357
data = self._pipe.recv()
1358
if data[0] == 'data':
1359
return data[1]
1360
if data[0] == 'function':
1361
def func(*args, **kwargs):
1362
self._pipe.send(('funcall', name, args, kwargs))
1363
return self._pipe.recv()[1]
1364
return func
1365
1366
def __setattr__(self, name, value):
1367
if(name == '_pipe'):
1368
return super(ProxyClient, self).__setattr__(name, value)
1369
self._pipe.send(('setattr', name, value))
1370
1371
class ClientDBusTransitional(ClientDBus):
1372
__metaclass__ = AlternateDBusNamesMetaclass
1373
1374
class ClientHandler(socketserver.BaseRequestHandler, object):
1375
"""A class to handle client connections.
1376
1377
Instantiated once for each connection to handle it.
586
def peer_certificate(session):
587
"Return the peer's OpenPGP certificate as a bytestring"
588
# If not an OpenPGP certificate...
589
if (gnutls.library.functions
590
.gnutls_certificate_type_get(session._c_object)
591
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
# ...do the normal thing
593
return session.peer_certificate
594
list_size = ctypes.c_uint()
595
cert_list = (gnutls.library.functions
596
.gnutls_certificate_get_peers
597
(session._c_object, ctypes.byref(list_size)))
598
if list_size.value == 0:
599
return None
600
cert = cert_list[0]
601
return ctypes.string_at(cert.data, cert.size)
602
603
604
def fingerprint(openpgp):
605
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
# New GnuTLS "datum" with the OpenPGP public key
607
datum = (gnutls.library.types
608
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
ctypes.POINTER
610
(ctypes.c_ubyte)),
611
ctypes.c_uint(len(openpgp))))
612
# New empty GnuTLS certificate
613
crt = gnutls.library.types.gnutls_openpgp_crt_t()
614
(gnutls.library.functions
615
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
616
# Import the OpenPGP public key into the certificate
617
(gnutls.library.functions
618
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
gnutls.library.constants
620
.GNUTLS_OPENPGP_FMT_RAW))
621
# Verify the self signature in the key
622
crtverify = ctypes.c_uint()
623
(gnutls.library.functions
624
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
if crtverify.value != 0:
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
raise gnutls.errors.CertificateSecurityError("Verify failed")
628
# New buffer for the fingerprint
629
buf = ctypes.create_string_buffer(20)
630
buf_len = ctypes.c_size_t()
631
# Get the fingerprint from the certificate into the buffer
632
(gnutls.library.functions
633
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
ctypes.byref(buf_len)))
635
# Deinit the certificate
636
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
637
# Convert the buffer to a Python bytestring
638
fpr = ctypes.string_at(buf, buf_len.value)
639
# Convert the bytestring to hexadecimal notation
640
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
641
return hex_fpr
642
643
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
645
"""A TCP request handler class.
646
Instantiated by IPv6_TCPServer for each request to handle it.
1378
647
Note: This will run in its own forked process."""
1379
648
1380
649
def handle(self):
1381
with contextlib.closing(self.server.child_pipe) as child_pipe:
1382
logger.info("TCP connection from: %s",
1383
unicode(self.client_address))
1384
logger.debug("Pipe FD: %d",
1385
self.server.child_pipe.fileno())
1386
1387
session = (gnutls.connection
1388
.ClientSession(self.request,
1389
gnutls.connection
1390
.X509Credentials()))
1391
1392
# Note: gnutls.connection.X509Credentials is really a
1393
# generic GnuTLS certificate credentials object so long as
1394
# no X.509 keys are added to it. Therefore, we can use it
1395
# here despite using OpenPGP certificates.
1396
1397
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1398
# "+AES-256-CBC", "+SHA1",
1399
# "+COMP-NULL", "+CTYPE-OPENPGP",
1400
# "+DHE-DSS"))
1401
# Use a fallback default, since this MUST be set.
1402
priority = self.server.gnutls_priority
1403
if priority is None:
1404
priority = "NORMAL"
1405
(gnutls.library.functions
1406
.gnutls_priority_set_direct(session._c_object,
1407
priority, None))
1408
1409
# Start communication using the Mandos protocol
1410
# Get protocol number
1411
line = self.request.makefile().readline()
1412
logger.debug("Protocol version: %r", line)
1413
try:
1414
if int(line.strip().split()[0]) > 1:
1415
raise RuntimeError
1416
except (ValueError, IndexError, RuntimeError) as error:
1417
logger.error("Unknown protocol version: %s", error)
1418
return
1419
1420
# Start GnuTLS connection
1421
try:
1422
session.handshake()
1423
except gnutls.errors.GNUTLSError as error:
1424
logger.warning("Handshake failed: %s", error)
1425
# Do not run session.bye() here: the session is not
1426
# established. Just abandon the request.
1427
return
1428
logger.debug("Handshake succeeded")
1429
1430
approval_required = False
1431
try:
1432
try:
1433
fpr = self.fingerprint(self.peer_certificate
1434
(session))
1435
except (TypeError,
1436
gnutls.errors.GNUTLSError) as error:
1437
logger.warning("Bad certificate: %s", error)
1438
return
1439
logger.debug("Fingerprint: %s", fpr)
1440
if self.server.use_dbus:
1441
# Emit D-Bus signal
1442
client.NewRequest(str(self.client_address))
1443
1444
try:
1445
client = ProxyClient(child_pipe, fpr,
1446
self.client_address)
1447
except KeyError:
1448
return
1449
1450
if client.approval_delay:
1451
delay = client.approval_delay
1452
client.approvals_pending += 1
1453
approval_required = True
1454
1455
while True:
1456
if not client.enabled:
1457
logger.info("Client %s is disabled",
1458
client.name)
1459
if self.server.use_dbus:
1460
# Emit D-Bus signal
1461
client.Rejected("Disabled")
1462
return
1463
1464
if client._approved or not client.approval_delay:
1465
#We are approved or approval is disabled
1466
break
1467
elif client._approved is None:
1468
logger.info("Client %s needs approval",
1469
client.name)
1470
if self.server.use_dbus:
1471
# Emit D-Bus signal
1472
client.NeedApproval(
1473
client.approval_delay_milliseconds(),
1474
client.approved_by_default)
1475
else:
1476
logger.warning("Client %s was not approved",
1477
client.name)
1478
if self.server.use_dbus:
1479
# Emit D-Bus signal
1480
client.Rejected("Denied")
1481
return
1482
1483
#wait until timeout or approved
1484
time = datetime.datetime.now()
1485
client.changedstate.acquire()
1486
(client.changedstate.wait
1487
(float(client._timedelta_to_milliseconds(delay)
1488
/ 1000)))
1489
client.changedstate.release()
1490
time2 = datetime.datetime.now()
1491
if (time2 - time) >= delay:
1492
if not client.approved_by_default:
1493
logger.warning("Client %s timed out while"
1494
" waiting for approval",
1495
client.name)
1496
if self.server.use_dbus:
1497
# Emit D-Bus signal
1498
client.Rejected("Approval timed out")
1499
return
1500
else:
1501
break
1502
else:
1503
delay -= time2 - time
1504
1505
sent_size = 0
1506
while sent_size < len(client.secret):
1507
try:
1508
sent = session.send(client.secret[sent_size:])
1509
except gnutls.errors.GNUTLSError as error:
1510
logger.warning("gnutls send failed")
1511
return
1512
logger.debug("Sent: %d, remaining: %d",
1513
sent, len(client.secret)
1514
- (sent_size + sent))
1515
sent_size += sent
1516
1517
logger.info("Sending secret to %s", client.name)
1518
# bump the timeout using extended_timeout
1519
client.checked_ok(client.extended_timeout)
1520
if self.server.use_dbus:
1521
# Emit D-Bus signal
1522
client.GotSecret()
1523
1524
finally:
1525
if approval_required:
1526
client.approvals_pending -= 1
1527
try:
1528
session.bye()
1529
except gnutls.errors.GNUTLSError as error:
1530
logger.warning("GnuTLS bye failed")
1531
1532
@staticmethod
1533
def peer_certificate(session):
1534
"Return the peer's OpenPGP certificate as a bytestring"
1535
# If not an OpenPGP certificate...
1536
if (gnutls.library.functions
1537
.gnutls_certificate_type_get(session._c_object)
1538
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1539
# ...do the normal thing
1540
return session.peer_certificate
1541
list_size = ctypes.c_uint(1)
1542
cert_list = (gnutls.library.functions
1543
.gnutls_certificate_get_peers
1544
(session._c_object, ctypes.byref(list_size)))
1545
if not bool(cert_list) and list_size.value != 0:
1546
raise gnutls.errors.GNUTLSError("error getting peer"
1547
" certificate")
1548
if list_size.value == 0:
1549
return None
1550
cert = cert_list[0]
1551
return ctypes.string_at(cert.data, cert.size)
1552
1553
@staticmethod
1554
def fingerprint(openpgp):
1555
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1556
# New GnuTLS "datum" with the OpenPGP public key
1557
datum = (gnutls.library.types
1558
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1559
ctypes.POINTER
1560
(ctypes.c_ubyte)),
1561
ctypes.c_uint(len(openpgp))))
1562
# New empty GnuTLS certificate
1563
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1564
(gnutls.library.functions
1565
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1566
# Import the OpenPGP public key into the certificate
1567
(gnutls.library.functions
1568
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1569
gnutls.library.constants
1570
.GNUTLS_OPENPGP_FMT_RAW))
1571
# Verify the self signature in the key
1572
crtverify = ctypes.c_uint()
1573
(gnutls.library.functions
1574
.gnutls_openpgp_crt_verify_self(crt, 0,
1575
ctypes.byref(crtverify)))
1576
if crtverify.value != 0:
1577
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1578
raise (gnutls.errors.CertificateSecurityError
1579
("Verify failed"))
1580
# New buffer for the fingerprint
1581
buf = ctypes.create_string_buffer(20)
1582
buf_len = ctypes.c_size_t()
1583
# Get the fingerprint from the certificate into the buffer
1584
(gnutls.library.functions
1585
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1586
ctypes.byref(buf_len)))
1587
# Deinit the certificate
1588
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1589
# Convert the buffer to a Python bytestring
1590
fpr = ctypes.string_at(buf, buf_len.value)
1591
# Convert the bytestring to hexadecimal notation
1592
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1593
return hex_fpr
1594
1595
1596
class MultiprocessingMixIn(object):
1597
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1598
def sub_process_main(self, request, address):
1599
try:
1600
self.finish_request(request, address)
1601
except:
1602
self.handle_error(request, address)
1603
self.close_request(request)
1604
1605
def process_request(self, request, address):
1606
"""Start a new process to process the request."""
1607
proc = multiprocessing.Process(target = self.sub_process_main,
1608
args = (request,
1609
address))
1610
proc.start()
1611
return proc
1612
1613
1614
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1615
""" adds a pipe to the MixIn """
1616
def process_request(self, request, client_address):
1617
"""Overrides and wraps the original process_request().
1618
1619
This function creates a new pipe in self.pipe
1620
"""
1621
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1622
1623
proc = MultiprocessingMixIn.process_request(self, request,
1624
client_address)
1625
self.child_pipe.close()
1626
self.add_pipe(parent_pipe, proc)
1627
1628
def add_pipe(self, parent_pipe, proc):
1629
"""Dummy function; override as necessary"""
1630
raise NotImplementedError
1631
1632
1633
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1634
socketserver.TCPServer, object):
1635
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1636
650
logger.info(u"TCP connection from: %s",
651
unicode(self.client_address))
652
session = (gnutls.connection
653
.ClientSession(self.request,
654
gnutls.connection
655
.X509Credentials()))
656
657
line = self.request.makefile().readline()
658
logger.debug(u"Protocol version: %r", line)
659
try:
660
if int(line.strip().split()[0]) > 1:
661
raise RuntimeError
662
except (ValueError, IndexError, RuntimeError), error:
663
logger.error(u"Unknown protocol version: %s", error)
664
return
665
666
# Note: gnutls.connection.X509Credentials is really a generic
667
# GnuTLS certificate credentials object so long as no X.509
668
# keys are added to it. Therefore, we can use it here despite
669
# using OpenPGP certificates.
670
671
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
672
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
673
# "+DHE-DSS"))
674
# Use a fallback default, since this MUST be set.
675
priority = self.server.settings.get("priority", "NORMAL")
676
(gnutls.library.functions
677
.gnutls_priority_set_direct(session._c_object,
678
priority, None))
679
680
try:
681
session.handshake()
682
except gnutls.errors.GNUTLSError, error:
683
logger.warning(u"Handshake failed: %s", error)
684
# Do not run session.bye() here: the session is not
685
# established. Just abandon the request.
686
return
687
try:
688
fpr = fingerprint(peer_certificate(session))
689
except (TypeError, gnutls.errors.GNUTLSError), error:
690
logger.warning(u"Bad certificate: %s", error)
691
session.bye()
692
return
693
logger.debug(u"Fingerprint: %s", fpr)
694
for c in self.server.clients:
695
if c.fingerprint == fpr:
696
client = c
697
break
698
else:
699
logger.warning(u"Client not found for fingerprint: %s",
700
fpr)
701
session.bye()
702
return
703
# Have to check if client.still_valid(), since it is possible
704
# that the client timed out while establishing the GnuTLS
705
# session.
706
if not client.still_valid():
707
logger.warning(u"Client %(name)s is invalid",
708
vars(client))
709
session.bye()
710
return
711
## This won't work here, since we're in a fork.
712
# client.bump_timeout()
713
sent_size = 0
714
while sent_size < len(client.secret):
715
sent = session.send(client.secret[sent_size:])
716
logger.debug(u"Sent: %d, remaining: %d",
717
sent, len(client.secret)
718
- (sent_size + sent))
719
sent_size += sent
720
session.bye()
721
722
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
SocketServer.TCPServer, object):
725
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1637
726
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
1638
729
enabled: Boolean; whether this server is activated yet
1639
interface: None or a network interface name (string)
1640
use_ipv6: Boolean; to use IPv6 or not
1641
730
"""
1642
def __init__(self, server_address, RequestHandlerClass,
1643
interface=None, use_ipv6=True):
1644
self.interface = interface
1645
if use_ipv6:
1646
self.address_family = socket.AF_INET6
1647
socketserver.TCPServer.__init__(self, server_address,
1648
RequestHandlerClass)
731
address_family = socket.AF_INET6
732
def __init__(self, *args, **kwargs):
733
if "settings" in kwargs:
734
self.settings = kwargs["settings"]
735
del kwargs["settings"]
736
if "clients" in kwargs:
737
self.clients = kwargs["clients"]
738
del kwargs["clients"]
739
self.enabled = False
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1649
741
def server_bind(self):
1650
742
"""This overrides the normal server_bind() function
1651
743
to bind to an interface if one was specified, and also NOT to
1652
744
bind to an address or port if they were not specified."""
1653
if self.interface is not None:
1654
if SO_BINDTODEVICE is None:
1655
logger.error("SO_BINDTODEVICE does not exist;"
1656
" cannot bind to interface %s",
1657
self.interface)
1658
else:
1659
try:
1660
self.socket.setsockopt(socket.SOL_SOCKET,
1661
SO_BINDTODEVICE,
1662
str(self.interface
1663
+ '\0'))
1664
except socket.error as error:
1665
if error[0] == errno.EPERM:
1666
logger.error("No permission to"
1667
" bind to interface %s",
1668
self.interface)
1669
elif error[0] == errno.ENOPROTOOPT:
1670
logger.error("SO_BINDTODEVICE not available;"
1671
" cannot bind to interface %s",
1672
self.interface)
1673
else:
1674
raise
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
748
try:
749
self.socket.setsockopt(socket.SOL_SOCKET,
750
SO_BINDTODEVICE,
751
self.settings["interface"])
752
except socket.error, error:
753
if error[0] == errno.EPERM:
754
logger.error(u"No permission to"
755
u" bind to interface %s",
756
self.settings["interface"])
757
else:
758
raise error
1675
759
# Only bind(2) the socket if we really need to.
1676
760
if self.server_address[0] or self.server_address[1]:
1677
761
if not self.server_address[0]:
1678
if self.address_family == socket.AF_INET6:
1679
any_address = "::" # in6addr_any
1680
else:
1681
any_address = socket.INADDR_ANY
1682
self.server_address = (any_address,
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
1683
764
self.server_address[1])
1684
765
elif not self.server_address[1]:
1685
766
self.server_address = (self.server_address[0],
1686
767
0)
1687
# if self.interface:
768
# if self.settings["interface"]:
1688
769
# self.server_address = (self.server_address[0],
1689
770
# 0, # port
1690
771
# 0, # flowinfo
1691
772
# if_nametoindex
1692
# (self.interface))
1693
return socketserver.TCPServer.server_bind(self)
1694
1695
1696
class MandosServer(IPv6_TCPServer):
1697
"""Mandos server.
1698
1699
Attributes:
1700
clients: set of Client objects
1701
gnutls_priority GnuTLS priority string
1702
use_dbus: Boolean; to emit D-Bus signals or not
1703
1704
Assumes a gobject.MainLoop event loop.
1705
"""
1706
def __init__(self, server_address, RequestHandlerClass,
1707
interface=None, use_ipv6=True, clients=None,
1708
gnutls_priority=None, use_dbus=True):
1709
self.enabled = False
1710
self.clients = clients
1711
if self.clients is None:
1712
self.clients = {}
1713
self.use_dbus = use_dbus
1714
self.gnutls_priority = gnutls_priority
1715
IPv6_TCPServer.__init__(self, server_address,
1716
RequestHandlerClass,
1717
interface = interface,
1718
use_ipv6 = use_ipv6)
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
1719
776
def server_activate(self):
1720
777
if self.enabled:
1721
return socketserver.TCPServer.server_activate(self)
1722
778
return super(IPv6_TCPServer, self).server_activate()
1723
779
def enable(self):
1724
780
self.enabled = True
1725
1726
def add_pipe(self, parent_pipe, proc):
1727
# Call "handle_ipc" for both data and EOF events
1728
gobject.io_add_watch(parent_pipe.fileno(),
1729
gobject.IO_IN | gobject.IO_HUP,
1730
functools.partial(self.handle_ipc,
1731
parent_pipe =
1732
parent_pipe,
1733
proc = proc))
1734
1735
def handle_ipc(self, source, condition, parent_pipe=None,
1736
proc = None, client_object=None):
1737
condition_names = {
1738
gobject.IO_IN: "IN", # There is data to read.
1739
gobject.IO_OUT: "OUT", # Data can be written (without
1740
# blocking).
1741
gobject.IO_PRI: "PRI", # There is urgent data to read.
1742
gobject.IO_ERR: "ERR", # Error condition.
1743
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1744
# broken, usually for pipes and
1745
# sockets).
1746
}
1747
conditions_string = ' | '.join(name
1748
for cond, name in
1749
condition_names.iteritems()
1750
if cond & condition)
1751
# error, or the other end of multiprocessing.Pipe has closed
1752
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1753
# Wait for other process to exit
1754
proc.join()
1755
return False
1756
1757
# Read a request from the child
1758
request = parent_pipe.recv()
1759
command = request[0]
1760
1761
if command == 'init':
1762
fpr = request[1]
1763
address = request[2]
1764
1765
for c in self.clients.itervalues():
1766
if c.fingerprint == fpr:
1767
client = c
1768
break
1769
else:
1770
logger.info("Client not found for fingerprint: %s, ad"
1771
"dress: %s", fpr, address)
1772
if self.use_dbus:
1773
# Emit D-Bus signal
1774
mandos_dbus_service.ClientNotFound(fpr,
1775
address[0])
1776
parent_pipe.send(False)
1777
return False
1778
1779
gobject.io_add_watch(parent_pipe.fileno(),
1780
gobject.IO_IN | gobject.IO_HUP,
1781
functools.partial(self.handle_ipc,
1782
parent_pipe =
1783
parent_pipe,
1784
proc = proc,
1785
client_object =
1786
client))
1787
parent_pipe.send(True)
1788
# remove the old hook in favor of the new above hook on
1789
# same fileno
1790
return False
1791
if command == 'funcall':
1792
funcname = request[1]
1793
args = request[2]
1794
kwargs = request[3]
1795
1796
parent_pipe.send(('data', getattr(client_object,
1797
funcname)(*args,
1798
**kwargs)))
1799
1800
if command == 'getattr':
1801
attrname = request[1]
1802
if callable(client_object.__getattribute__(attrname)):
1803
parent_pipe.send(('function',))
1804
else:
1805
parent_pipe.send(('data', client_object
1806
.__getattribute__(attrname)))
1807
1808
if command == 'setattr':
1809
attrname = request[1]
1810
value = request[2]
1811
setattr(client_object, attrname, value)
1812
1813
return True
1814
781
1815
782
1816
783
def string_to_delta(interval):
1817
784
"""Parse a string and return a datetime.timedelta
1818
785
1819
786
>>> string_to_delta('7d')
1820
787
datetime.timedelta(7)
1821
788
>>> string_to_delta('60s')
1824
791
datetime.timedelta(0, 3600)
1825
792
>>> string_to_delta('24h')
1826
793
datetime.timedelta(1)
1827
>>> string_to_delta('1w')
794
>>> string_to_delta(u'1w')
1828
795
datetime.timedelta(7)
1829
796
>>> string_to_delta('5m 30s')
1830
797
datetime.timedelta(0, 330)
1834
801
try:
1835
802
suffix = unicode(s[-1])
1836
803
value = int(s[:-1])
1837
if suffix == "d":
804
if suffix == u"d":
1838
805
delta = datetime.timedelta(value)
1839
elif suffix == "s":
806
elif suffix == u"s":
1840
807
delta = datetime.timedelta(0, value)
1841
elif suffix == "m":
808
elif suffix == u"m":
1842
809
delta = datetime.timedelta(0, 0, 0, 0, value)
1843
elif suffix == "h":
810
elif suffix == u"h":
1844
811
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1845
elif suffix == "w":
812
elif suffix == u"w":
1846
813
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1847
814
else:
1848
raise ValueError("Unknown suffix %r" % suffix)
1849
except (ValueError, IndexError) as e:
1850
raise ValueError(*(e.args))
815
raise ValueError
816
except (ValueError, IndexError):
817
raise ValueError
1851
818
timevalue += delta
1852
819
return timevalue
1853
820
1854
821
822
def server_state_changed(state):
823
"""Derived from the Avahi example code"""
824
if state == avahi.SERVER_COLLISION:
825
logger.error(u"Zeroconf server name collision")
826
service.remove()
827
elif state == avahi.SERVER_RUNNING:
828
service.add()
829
830
831
def entry_group_state_changed(state, error):
832
"""Derived from the Avahi example code"""
833
logger.debug(u"Avahi state change: %i", state)
834
835
if state == avahi.ENTRY_GROUP_ESTABLISHED:
836
logger.debug(u"Zeroconf service established.")
837
elif state == avahi.ENTRY_GROUP_COLLISION:
838
logger.warning(u"Zeroconf service name collision.")
839
service.rename()
840
elif state == avahi.ENTRY_GROUP_FAILURE:
841
logger.critical(u"Avahi: Error in group state changed %s",
842
unicode(error))
843
raise AvahiGroupError(u"State changed: %s" % unicode(error))
844
1855
845
def if_nametoindex(interface):
1856
"""Call the C function if_nametoindex(), or equivalent
1857
1858
Note: This function cannot accept a unicode string."""
846
"""Call the C function if_nametoindex(), or equivalent"""
1859
847
global if_nametoindex
1860
848
try:
1861
849
if_nametoindex = (ctypes.cdll.LoadLibrary
1862
850
(ctypes.util.find_library("c"))
1863
851
.if_nametoindex)
1864
852
except (OSError, AttributeError):
1865
logger.warning("Doing if_nametoindex the hard way")
853
if "struct" not in sys.modules:
854
import struct
855
if "fcntl" not in sys.modules:
856
import fcntl
1866
857
def if_nametoindex(interface):
1867
858
"Get an interface index the hard way, i.e. using fcntl()"
1868
859
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1869
with contextlib.closing(socket.socket()) as s:
860
with closing(socket.socket()) as s:
1870
861
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1871
struct.pack(str("16s16x"),
1872
interface))
1873
interface_index = struct.unpack(str("I"),
1874
ifreq[16:20])[0]
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
1875
864
return interface_index
1876
865
return if_nametoindex(interface)
1877
866
1878
867
1879
868
def daemon(nochdir = False, noclose = False):
1880
869
"""See daemon(3). Standard BSD Unix function.
1881
1882
870
This should really exist as os.daemon, but it doesn't (yet)."""
1883
871
if os.fork():
1884
872
sys.exit()
1892
880
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1893
881
if not stat.S_ISCHR(os.fstat(null).st_mode):
1894
882
raise OSError(errno.ENODEV,
1895
"%s not a character device"
1896
% os.path.devnull)
883
"/dev/null not a character device")
1897
884
os.dup2(null, sys.stdin.fileno())
1898
885
os.dup2(null, sys.stdout.fileno())
1899
886
os.dup2(null, sys.stderr.fileno())
1902
889
1903
890
1904
891
def main():
1905
1906
##################################################################
1907
# Parsing of options, both command line and config file
1908
1909
parser = argparse.ArgumentParser()
1910
parser.add_argument("-v", "--version", action="version",
1911
version = "%%(prog)s %s" % version,
1912
help="show version number and exit")
1913
parser.add_argument("-i", "--interface", metavar="IF",
1914
help="Bind to interface IF")
1915
parser.add_argument("-a", "--address",
1916
help="Address to listen for requests on")
1917
parser.add_argument("-p", "--port", type=int,
1918
help="Port number to receive requests on")
1919
parser.add_argument("--check", action="store_true",
1920
help="Run self-test")
1921
parser.add_argument("--debug", action="store_true",
1922
help="Debug mode; run in foreground and log"
1923
" to terminal")
1924
parser.add_argument("--debuglevel", metavar="LEVEL",
1925
help="Debug level for stdout output")
1926
parser.add_argument("--priority", help="GnuTLS"
1927
" priority string (see GnuTLS documentation)")
1928
parser.add_argument("--servicename",
1929
metavar="NAME", help="Zeroconf service name")
1930
parser.add_argument("--configdir",
1931
default="/etc/mandos", metavar="DIR",
1932
help="Directory to search for configuration"
1933
" files")
1934
parser.add_argument("--no-dbus", action="store_false",
1935
dest="use_dbus", help="Do not provide D-Bus"
1936
" system bus interface")
1937
parser.add_argument("--no-ipv6", action="store_false",
1938
dest="use_ipv6", help="Do not use IPv6")
1939
parser.add_argument("--no-restore", action="store_false",
1940
dest="restore", help="Do not restore stored state",
1941
default=True)
1942
1943
options = parser.parse_args()
892
parser = optparse.OptionParser(version = "%%prog %s" % version)
893
parser.add_option("-i", "--interface", type="string",
894
metavar="IF", help="Bind to interface IF")
895
parser.add_option("-a", "--address", type="string",
896
help="Address to listen for requests on")
897
parser.add_option("-p", "--port", type="int",
898
help="Port number to receive requests on")
899
parser.add_option("--check", action="store_true",
900
help="Run self-test")
901
parser.add_option("--debug", action="store_true",
902
help="Debug mode; run in foreground and log to"
903
" terminal")
904
parser.add_option("--priority", type="string", help="GnuTLS"
905
" priority string (see GnuTLS documentation)")
906
parser.add_option("--servicename", type="string", metavar="NAME",
907
help="Zeroconf service name")
908
parser.add_option("--configdir", type="string",
909
default="/etc/mandos", metavar="DIR",
910
help="Directory to search for configuration"
911
" files")
912
parser.add_option("--no-dbus", action="store_false",
913
dest="use_dbus",
914
help="Do not provide D-Bus system bus"
915
" interface")
916
options = parser.parse_args()[0]
1944
917
1945
918
if options.check:
1946
919
import doctest
1956
929
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1957
930
"servicename": "Mandos",
1958
931
"use_dbus": "True",
1959
"use_ipv6": "True",
1960
"debuglevel": "",
1961
932
}
1962
933
1963
934
# Parse config file for server-global settings
1964
server_config = configparser.SafeConfigParser(server_defaults)
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
1965
936
del server_defaults
1966
server_config.read(os.path.join(options.configdir,
1967
"mandos.conf"))
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1968
938
# Convert the SafeConfigParser object to a dict
1969
939
server_settings = server_config.defaults()
1970
# Use the appropriate methods on the non-string config options
1971
for option in ("debug", "use_dbus", "use_ipv6"):
1972
server_settings[option] = server_config.getboolean("DEFAULT",
1973
option)
1974
if server_settings["port"]:
1975
server_settings["port"] = server_config.getint("DEFAULT",
1976
"port")
940
# Use getboolean on the boolean config options
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
943
server_settings["use_dbus"] = (server_config.getboolean
944
("DEFAULT", "use_dbus"))
1977
945
del server_config
1978
946
1979
947
# Override the settings from the config file with command line
1980
948
# options, if set.
1981
949
for option in ("interface", "address", "port", "debug",
1982
950
"priority", "servicename", "configdir",
1983
"use_dbus", "use_ipv6", "debuglevel", "restore"):
951
"use_dbus"):
1984
952
value = getattr(options, option)
1985
953
if value is not None:
1986
954
server_settings[option] = value
1987
955
del options
1988
# Force all strings to be unicode
1989
for option in server_settings.keys():
1990
if type(server_settings[option]) is str:
1991
server_settings[option] = unicode(server_settings[option])
1992
956
# Now we have our good server settings in "server_settings"
1993
957
1994
##################################################################
1995
1996
958
# For convenience
1997
959
debug = server_settings["debug"]
1998
debuglevel = server_settings["debuglevel"]
1999
960
use_dbus = server_settings["use_dbus"]
2000
use_ipv6 = server_settings["use_ipv6"]
2001
961
2002
if debug:
2003
initlogger(logging.DEBUG)
2004
else:
2005
if not debuglevel:
2006
initlogger()
2007
else:
2008
level = getattr(logging, debuglevel.upper())
2009
initlogger(level)
962
if not debug:
963
syslogger.setLevel(logging.WARNING)
964
console.setLevel(logging.WARNING)
2010
965
2011
966
if server_settings["servicename"] != "Mandos":
2012
967
syslogger.setFormatter(logging.Formatter
2013
('Mandos (%s) [%%(process)d]:'
2014
' %%(levelname)s: %%(message)s'
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
2015
970
% server_settings["servicename"]))
2016
971
2017
972
# Parse config file with clients
2018
client_defaults = { "timeout": "5m",
2019
"extended_timeout": "15m",
2020
"interval": "2m",
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
2021
975
"checker": "fping -q -- %%(host)s",
2022
976
"host": "",
2023
"approval_delay": "0s",
2024
"approval_duration": "1s",
2025
977
}
2026
client_config = configparser.SafeConfigParser(client_defaults)
978
client_config = ConfigParser.SafeConfigParser(client_defaults)
2027
979
client_config.read(os.path.join(server_settings["configdir"],
2028
980
"clients.conf"))
2029
981
2030
global mandos_dbus_service
2031
mandos_dbus_service = None
2032
2033
tcp_server = MandosServer((server_settings["address"],
2034
server_settings["port"]),
2035
ClientHandler,
2036
interface=(server_settings["interface"]
2037
or None),
2038
use_ipv6=use_ipv6,
2039
gnutls_priority=
2040
server_settings["priority"],
2041
use_dbus=use_dbus)
2042
if not debug:
2043
pidfilename = "/var/run/mandos.pid"
2044
try:
2045
pidfile = open(pidfilename, "w")
2046
except IOError:
2047
logger.error("Could not open file %r", pidfilename)
982
clients = Set()
983
tcp_server = IPv6_TCPServer((server_settings["address"],
984
server_settings["port"]),
985
TCP_handler,
986
settings=server_settings,
987
clients=clients)
988
pidfilename = "/var/run/mandos.pid"
989
try:
990
pidfile = open(pidfilename, "w")
991
except IOError, error:
992
logger.error("Could not open file %r", pidfilename)
2048
993
2049
994
try:
2050
995
uid = pwd.getpwnam("_mandos").pw_uid
2056
1001
except KeyError:
2057
1002
try:
2058
1003
uid = pwd.getpwnam("nobody").pw_uid
2059
gid = pwd.getpwnam("nobody").pw_gid
1004
gid = pwd.getpwnam("nogroup").pw_gid
2060
1005
except KeyError:
2061
1006
uid = 65534
2062
1007
gid = 65534
2063
1008
try:
1009
os.setuid(uid)
2064
1010
os.setgid(gid)
2065
os.setuid(uid)
2066
except OSError as error:
1011
except OSError, error:
2067
1012
if error[0] != errno.EPERM:
2068
1013
raise error
2069
1014
2070
if debug:
2071
# Enable all possible GnuTLS debugging
2072
2073
# "Use a log level over 10 to enable all debugging options."
2074
# - GnuTLS manual
2075
gnutls.library.functions.gnutls_global_set_log_level(11)
2076
2077
@gnutls.library.types.gnutls_log_func
2078
def debug_gnutls(level, string):
2079
logger.debug("GnuTLS: %s", string[:-1])
2080
2081
(gnutls.library.functions
2082
.gnutls_global_set_log_function(debug_gnutls))
2083
2084
# Redirect stdin so all checkers get /dev/null
2085
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2086
os.dup2(null, sys.stdin.fileno())
2087
if null > 2:
2088
os.close(null)
2089
else:
2090
# No console logging
2091
logger.removeHandler(console)
2092
2093
# Need to fork before connecting to D-Bus
2094
if not debug:
2095
# Close all input and output, do double fork, etc.
2096
daemon()
1015
global service
1016
service = AvahiService(name = server_settings["servicename"],
1017
servicetype = "_mandos._tcp", )
1018
if server_settings["interface"]:
1019
service.interface = (if_nametoindex
1020
(server_settings["interface"]))
2097
1021
2098
1022
global main_loop
1023
global bus
1024
global server
2099
1025
# From the Avahi example code
2100
1026
DBusGMainLoop(set_as_default=True )
2101
1027
main_loop = gobject.MainLoop()
2102
1028
bus = dbus.SystemBus()
1029
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1030
avahi.DBUS_PATH_SERVER),
1031
avahi.DBUS_INTERFACE_SERVER)
2103
1032
# End of Avahi example code
2104
1033
if use_dbus:
2105
try:
2106
bus_name = dbus.service.BusName("se.recompile.Mandos",
2107
bus, do_not_queue=True)
2108
old_bus_name = (dbus.service.BusName
2109
("se.bsnet.fukt.Mandos", bus,
2110
do_not_queue=True))
2111
except dbus.exceptions.NameExistsException as e:
2112
logger.error(unicode(e) + ", disabling D-Bus")
2113
use_dbus = False
2114
server_settings["use_dbus"] = False
2115
tcp_server.use_dbus = False
2116
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2117
service = AvahiServiceToSyslog(name =
2118
server_settings["servicename"],
2119
servicetype = "_mandos._tcp",
2120
protocol = protocol, bus = bus)
2121
if server_settings["interface"]:
2122
service.interface = (if_nametoindex
2123
(str(server_settings["interface"])))
2124
2125
global multiprocessing_manager
2126
multiprocessing_manager = multiprocessing.Manager()
2127
2128
client_class = Client
2129
if use_dbus:
2130
client_class = functools.partial(ClientDBusTransitional,
2131
bus = bus)
2132
2133
special_settings = {
2134
# Some settings need to be accessd by special methods;
2135
# booleans need .getboolean(), etc. Here is a list of them:
2136
"approved_by_default":
2137
lambda section:
2138
client_config.getboolean(section, "approved_by_default"),
2139
}
2140
# Construct a new dict of client settings of this form:
2141
# { client_name: {setting_name: value, ...}, ...}
2142
# with exceptions for any special settings as defined above
2143
client_settings = dict((clientname,
2144
dict((setting,
2145
(value if setting not in special_settings
2146
else special_settings[setting](clientname)))
2147
for setting, value in client_config.items(clientname)))
2148
for clientname in client_config.sections())
2149
2150
old_client_settings = {}
2151
clients_data = []
2152
2153
# Get client data and settings from last running state.
2154
if server_settings["restore"]:
2155
try:
2156
with open(stored_state_path, "rb") as stored_state:
2157
clients_data, old_client_settings = pickle.load(stored_state)
2158
os.remove(stored_state_path)
2159
except IOError as e:
2160
logger.warning("Could not load persistant state: {0}".format(e))
2161
if e.errno != errno.ENOENT:
2162
raise
2163
2164
for client in clients_data:
2165
client_name = client["name"]
2166
2167
# Decide which value to use after restoring saved state.
2168
# We have three different values: Old config file,
2169
# new config file, and saved state.
2170
# New config value takes precedence if it differs from old
2171
# config value, otherwise use saved state.
2172
for name, value in client_settings[client_name].items():
2173
try:
2174
# For each value in new config, check if it differs
2175
# from the old config value (Except for the "secret"
2176
# attribute)
2177
if name != "secret" and value != old_client_settings[client_name][name]:
2178
setattr(client, name, value)
2179
except KeyError:
2180
pass
2181
2182
# Clients who has passed its expire date, can still be enabled if its
2183
# last checker was sucessful. Clients who checkers failed before we
2184
# stored it state is asumed to had failed checker during downtime.
2185
if client["enabled"] and client["last_checked_ok"]:
2186
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2187
> client["interval"]):
2188
if client["last_checker_status"] != 0:
2189
client["enabled"] = False
2190
else:
2191
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2192
2193
client["changedstate"] = (multiprocessing_manager
2194
.Condition(multiprocessing_manager
2195
.Lock()))
2196
if use_dbus:
2197
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2198
tcp_server.clients[client_name] = new_client
2199
new_client.bus = bus
2200
for name, value in client.iteritems():
2201
setattr(new_client, name, value)
2202
client_object_name = unicode(client_name).translate(
2203
{ord("."): ord("_"),
2204
ord("-"): ord("_")})
2205
new_client.dbus_object_path = (dbus.ObjectPath
2206
("/clients/" + client_object_name))
2207
DBusObjectWithProperties.__init__(new_client,
2208
new_client.bus,
2209
new_client.dbus_object_path)
2210
else:
2211
tcp_server.clients[client_name] = Client.__new__(Client)
2212
for name, value in client.iteritems():
2213
setattr(tcp_server.clients[client_name], name, value)
2214
2215
tcp_server.clients[client_name].decrypt_secret(
2216
client_settings[client_name]["secret"])
2217
2218
# Create/remove clients based on new changes made to config
2219
for clientname in set(old_client_settings) - set(client_settings):
2220
del tcp_server.clients[clientname]
2221
for clientname in set(client_settings) - set(old_client_settings):
2222
tcp_server.clients[clientname] = (client_class(name = clientname,
2223
config =
2224
client_settings
2225
[clientname]))
2226
2227
2228
if not tcp_server.clients:
2229
logger.warning("No clients defined")
2230
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1035
bus)
1036
1037
clients.update(Set(Client(name = section,
1038
config
1039
= dict(client_config.items(section)),
1040
use_dbus = use_dbus)
1041
for section in client_config.sections()))
1042
if not clients:
1043
logger.warning(u"No clients defined")
1044
1045
if debug:
1046
# Redirect stdin so all checkers get /dev/null
1047
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1048
os.dup2(null, sys.stdin.fileno())
1049
if null > 2:
1050
os.close(null)
1051
else:
1052
# No console logging
1053
logger.removeHandler(console)
1054
# Close all input and output, do double fork, etc.
1055
daemon()
1056
1057
try:
1058
pid = os.getpid()
1059
pidfile.write(str(pid) + "\n")
1060
pidfile.close()
1061
del pidfile
1062
except IOError:
1063
logger.error(u"Could not write to file %r with PID %d",
1064
pidfilename, pid)
1065
except NameError:
1066
# "pidfile" was never created
1067
pass
1068
del pidfilename
1069
1070
def cleanup():
1071
"Cleanup function; run on exit"
1072
global group
1073
# From the Avahi example code
1074
if not group is None:
1075
group.Free()
1076
group = None
1077
# End of Avahi example code
1078
1079
while clients:
1080
client = clients.pop()
1081
client.disable_hook = None
1082
client.disable()
1083
1084
atexit.register(cleanup)
1085
2231
1086
if not debug:
2232
try:
2233
with pidfile:
2234
pid = os.getpid()
2235
pidfile.write(str(pid) + "\n".encode("utf-8"))
2236
del pidfile
2237
except IOError:
2238
logger.error("Could not write to file %r with PID %d",
2239
pidfilename, pid)
2240
except NameError:
2241
# "pidfile" was never created
2242
pass
2243
del pidfilename
2244
2245
1087
signal.signal(signal.SIGINT, signal.SIG_IGN)
2246
2247
1088
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2248
1089
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2249
1090
2250
1091
if use_dbus:
2251
class MandosDBusService(dbus.service.Object):
1092
class MandosServer(dbus.service.Object):
2252
1093
"""A D-Bus proxy object"""
2253
1094
def __init__(self):
2254
dbus.service.Object.__init__(self, bus, "/")
2255
_interface = "se.recompile.Mandos"
2256
1095
dbus.service.Object.__init__(self, bus,
1096
"/Mandos")
1097
_interface = u"org.mandos_system.Mandos"
1098
1099
@dbus.service.signal(_interface, signature="oa{sv}")
1100
def ClientAdded(self, objpath, properties):
1101
"D-Bus signal"
1102
pass
1103
2257
1104
@dbus.service.signal(_interface, signature="o")
2258
def ClientAdded(self, objpath):
2259
"D-Bus signal"
2260
pass
2261
2262
@dbus.service.signal(_interface, signature="ss")
2263
def ClientNotFound(self, fingerprint, address):
2264
"D-Bus signal"
2265
pass
2266
2267
@dbus.service.signal(_interface, signature="os")
2268
def ClientRemoved(self, objpath, name):
2269
"D-Bus signal"
2270
pass
2271
1105
def ClientRemoved(self, objpath):
1106
"D-Bus signal"
1107
pass
1108
2272
1109
@dbus.service.method(_interface, out_signature="ao")
2273
1110
def GetAllClients(self):
2274
"D-Bus method"
2275
return dbus.Array(c.dbus_object_path
2276
for c in
2277
tcp_server.clients.itervalues())
2278
2279
@dbus.service.method(_interface,
2280
out_signature="a{oa{sv}}")
1111
return dbus.Array(c.dbus_object_path for c in clients)
1112
1113
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2281
1114
def GetAllClientsWithProperties(self):
2282
"D-Bus method"
2283
1115
return dbus.Dictionary(
2284
((c.dbus_object_path, c.GetAll(""))
2285
for c in tcp_server.clients.itervalues()),
1116
((c.dbus_object_path, c.GetAllProperties())
1117
for c in clients),
2286
1118
signature="oa{sv}")
2287
1119
2288
1120
@dbus.service.method(_interface, in_signature="o")
2289
1121
def RemoveClient(self, object_path):
2290
"D-Bus method"
2291
for c in tcp_server.clients.itervalues():
1122
for c in clients:
2292
1123
if c.dbus_object_path == object_path:
2293
del tcp_server.clients[c.name]
2294
c.remove_from_connection()
1124
clients.remove(c)
2295
1125
# Don't signal anything except ClientRemoved
2296
c.disable(quiet=True)
1126
c.use_dbus = False
1127
c.disable()
2297
1128
# Emit D-Bus signal
2298
self.ClientRemoved(object_path, c.name)
1129
self.ClientRemoved(object_path)
2299
1130
return
2300
raise KeyError(object_path)
2301
1131
raise KeyError
1132
@dbus.service.method(_interface)
1133
def Quit(self):
1134
main_loop.quit()
1135
2302
1136
del _interface
2303
2304
class MandosDBusServiceTransitional(MandosDBusService):
2305
__metaclass__ = AlternateDBusNamesMetaclass
2306
mandos_dbus_service = MandosDBusServiceTransitional()
2307
2308
def cleanup():
2309
"Cleanup function; run on exit"
2310
service.cleanup()
2311
2312
multiprocessing.active_children()
2313
if not (tcp_server.clients or client_settings):
2314
return
2315
2316
# Store client before exiting. Secrets are encrypted with key based
2317
# on what config file has. If config file is removed/edited, old
2318
# secret will thus be unrecovable.
2319
clients = []
2320
for client in tcp_server.clients.itervalues():
2321
client.encrypt_secret(client_settings[client.name]["secret"])
2322
2323
client_dict = {}
2324
2325
# A list of attributes that will not be stored when shuting down.
2326
exclude = set(("bus", "changedstate", "secret"))
2327
for name, typ in inspect.getmembers(dbus.service.Object):
2328
exclude.add(name)
2329
2330
client_dict["encrypted_secret"] = client.encrypted_secret
2331
for attr in client.client_structure:
2332
if attr not in exclude:
2333
client_dict[attr] = getattr(client, attr)
2334
2335
clients.append(client_dict)
2336
del client_settings[client.name]["secret"]
2337
2338
try:
2339
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2340
pickle.dump((clients, client_settings), stored_state)
2341
except IOError as e:
2342
logger.warning("Could not save persistant state: {0}".format(e))
2343
if e.errno != errno.ENOENT:
2344
raise
2345
2346
# Delete all clients, and settings from config
2347
while tcp_server.clients:
2348
name, client = tcp_server.clients.popitem()
2349
if use_dbus:
2350
client.remove_from_connection()
2351
# Don't signal anything except ClientRemoved
2352
client.disable(quiet=True)
2353
if use_dbus:
2354
# Emit D-Bus signal
2355
mandos_dbus_service.ClientRemoved(client
2356
.dbus_object_path,
2357
client.name)
2358
client_settings.clear()
2359
2360
atexit.register(cleanup)
2361
2362
for client in tcp_server.clients.itervalues():
1137
1138
mandos_server = MandosServer()
1139
1140
for client in clients:
2363
1141
if use_dbus:
2364
1142
# Emit D-Bus signal
2365
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2366
# Need to initiate checking of clients
2367
if client.enabled:
2368
client.init_checker()
2369
1143
mandos_server.ClientAdded(client.dbus_object_path,
1144
client.GetAllProperties())
1145
client.enable()
2370
1146
2371
1147
tcp_server.enable()
2372
1148
tcp_server.server_activate()
2373
1149
2374
1150
# Find out what port we got
2375
1151
service.port = tcp_server.socket.getsockname()[1]
2376
if use_ipv6:
2377
logger.info("Now listening on address %r, port %d,"
2378
" flowinfo %d, scope_id %d"
2379
% tcp_server.socket.getsockname())
2380
else: # IPv4
2381
logger.info("Now listening on address %r, port %d"
2382
% tcp_server.socket.getsockname())
1152
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1153
u" scope_id %d" % tcp_server.socket.getsockname())
2383
1154
2384
1155
#service.interface = tcp_server.socket.getsockname()[3]
2385
1156
2386
1157
try:
2387
1158
# From the Avahi example code
1159
server.connect_to_signal("StateChanged", server_state_changed)
2388
1160
try:
2389
service.activate()
2390
except dbus.exceptions.DBusException as error:
2391
logger.critical("DBusException: %s", error)
2392
cleanup()
1161
server_state_changed(server.GetState())
1162
except dbus.exceptions.DBusException, error:
1163
logger.critical(u"DBusException: %s", error)
2393
1164
sys.exit(1)
2394
1165
# End of Avahi example code
2395
1166
2398
1169
(tcp_server.handle_request
2399
1170
(*args[2:], **kwargs) or True))
2400
1171
2401
logger.debug("Starting main loop")
1172
logger.debug(u"Starting main loop")
2402
1173
main_loop.run()
2403
except AvahiError as error:
2404
logger.critical("AvahiError: %s", error)
2405
cleanup()
1174
except AvahiError, error:
1175
logger.critical(u"AvahiError: %s", error)
2406
1176
sys.exit(1)
2407
1177
except KeyboardInterrupt:
2408
1178
if debug:
2409
print("", file=sys.stderr)
2410
logger.debug("Server received KeyboardInterrupt")
2411
logger.debug("Server exiting")
2412
# Must run before the D-Bus bus name gets deregistered
2413
cleanup()
2414
1179
print
2415
1180
2416
1181
if __name__ == '__main__':
2417
1182
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0