To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 302
- compare with another revision
- download diff
- download tarball
- view history from revision 302
- Committer: Teddy Hogeborn
- Date: 2009-02-07 04:50:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20090207045039-xkr6b80vtqwqrq8l
* Makefile (install-client-nokey): Move "initramfs-tools-script" from
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
- 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
90
logger = logging.getLogger()
91
stored_state_path = "/var/lib/mandos/clients.pickle"
92
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
93
72
syslogger = (logging.handlers.SysLogHandler
94
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
74
address = "/dev/log"))
96
75
syslogger.setFormatter(logging.Formatter
97
76
('Mandos [%(process)d]: %(levelname)s:'
98
77
' %(message)s'))
99
78
logger.addHandler(syslogger)
100
79
101
80
console = logging.StreamHandler()
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
103
' [%(process)d]:'
104
' %(levelname)s:'
105
' %(message)s'))
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
106
83
logger.addHandler(console)
107
84
108
109
85
class AvahiError(Exception):
110
86
def __init__(self, value, *args, **kwargs):
111
87
self.value = value
122
98
123
99
class AvahiService(object):
124
100
"""An Avahi (Zeroconf) service.
125
126
101
Attributes:
127
102
interface: integer; avahi.IF_UNSPEC or an interface index.
128
103
Used to optionally bind to the specified interface.
136
111
max_renames: integer; maximum number of renames
137
112
rename_count: integer; counter so we only rename after collisions
138
113
a sensible number of times
139
group: D-Bus Entry Group
140
server: D-Bus Server
141
bus: dbus.SystemBus()
142
114
"""
143
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
144
116
servicetype = None, port = None, TXT = None,
145
domain = "", host = "", max_renames = 32768,
146
protocol = avahi.PROTO_UNSPEC, bus = None):
117
domain = "", host = "", max_renames = 32768):
147
118
self.interface = interface
148
119
self.name = name
149
120
self.type = servicetype
153
124
self.host = host
154
125
self.rename_count = 0
155
126
self.max_renames = max_renames
156
self.protocol = protocol
157
self.group = None # our entry group
158
self.server = None
159
self.bus = bus
160
self.entry_group_state_changed_match = None
161
127
def rename(self):
162
128
"""Derived from the Avahi example code"""
163
129
if self.rename_count >= self.max_renames:
164
logger.critical("No suitable Zeroconf service name found"
165
" after %i retries, exiting.",
130
logger.critical(u"No suitable Zeroconf service name found"
131
u" after %i retries, exiting.",
166
132
self.rename_count)
167
raise AvahiServiceError("Too many renames")
168
self.name = unicode(self.server
169
.GetAlternativeServiceName(self.name))
170
logger.info("Changing Zeroconf service name to %r ...",
171
self.name)
133
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
135
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
137
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
172
140
self.remove()
173
try:
174
self.add()
175
except dbus.exceptions.DBusException as error:
176
logger.critical("DBusException: %s", error)
177
self.cleanup()
178
os._exit(1)
141
self.add()
179
142
self.rename_count += 1
180
143
def remove(self):
181
144
"""Derived from the Avahi example code"""
182
if self.entry_group_state_changed_match is not None:
183
self.entry_group_state_changed_match.remove()
184
self.entry_group_state_changed_match = None
185
if self.group is not None:
186
self.group.Reset()
145
if group is not None:
146
group.Reset()
187
147
def add(self):
188
148
"""Derived from the Avahi example code"""
189
self.remove()
190
if self.group is None:
191
self.group = dbus.Interface(
192
self.bus.get_object(avahi.DBUS_NAME,
193
self.server.EntryGroupNew()),
194
avahi.DBUS_INTERFACE_ENTRY_GROUP)
195
self.entry_group_state_changed_match = (
196
self.group.connect_to_signal(
197
'StateChanged', self.entry_group_state_changed))
198
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
199
self.name, self.type)
200
self.group.AddService(
201
self.interface,
202
self.protocol,
203
dbus.UInt32(0), # flags
204
self.name, self.type,
205
self.domain, self.host,
206
dbus.UInt16(self.port),
207
avahi.string_array_to_txt_array(self.TXT))
208
self.group.Commit()
209
def entry_group_state_changed(self, state, error):
210
"""Derived from the Avahi example code"""
211
logger.debug("Avahi entry group state change: %i", state)
212
213
if state == avahi.ENTRY_GROUP_ESTABLISHED:
214
logger.debug("Zeroconf service established.")
215
elif state == avahi.ENTRY_GROUP_COLLISION:
216
logger.info("Zeroconf service name collision.")
217
self.rename()
218
elif state == avahi.ENTRY_GROUP_FAILURE:
219
logger.critical("Avahi: Error in group state changed %s",
220
unicode(error))
221
raise AvahiGroupError("State changed: %s"
222
% unicode(error))
223
def cleanup(self):
224
"""Derived from the Avahi example code"""
225
if self.group is not None:
226
try:
227
self.group.Free()
228
except (dbus.exceptions.UnknownMethodException,
229
dbus.exceptions.DBusException) as e:
230
pass
231
self.group = None
232
self.remove()
233
def server_state_changed(self, state, error=None):
234
"""Derived from the Avahi example code"""
235
logger.debug("Avahi server state change: %i", state)
236
bad_states = { avahi.SERVER_INVALID:
237
"Zeroconf server invalid",
238
avahi.SERVER_REGISTERING: None,
239
avahi.SERVER_COLLISION:
240
"Zeroconf server name collision",
241
avahi.SERVER_FAILURE:
242
"Zeroconf server failure" }
243
if state in bad_states:
244
if bad_states[state] is not None:
245
if error is None:
246
logger.error(bad_states[state])
247
else:
248
logger.error(bad_states[state] + ": %r", error)
249
self.cleanup()
250
elif state == avahi.SERVER_RUNNING:
251
self.add()
252
else:
253
if error is None:
254
logger.debug("Unknown state: %r", state)
255
else:
256
logger.debug("Unknown state: %r: %r", state, error)
257
def activate(self):
258
"""Derived from the Avahi example code"""
259
if self.server is None:
260
self.server = dbus.Interface(
261
self.bus.get_object(avahi.DBUS_NAME,
262
avahi.DBUS_PATH_SERVER,
263
follow_name_owner_changes=True),
264
avahi.DBUS_INTERFACE_SERVER)
265
self.server.connect_to_signal("StateChanged",
266
self.server_state_changed)
267
self.server_state_changed(self.server.GetState())
268
269
class AvahiServiceToSyslog(AvahiService):
270
def rename(self):
271
"""Add the new name to the syslog messages"""
272
ret = AvahiService.rename(self)
273
syslogger.setFormatter(logging.Formatter
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
276
% self.name))
277
return ret
278
279
def _timedelta_to_milliseconds(td):
280
"Convert a datetime.timedelta() to milliseconds"
281
return ((td.days * 24 * 60 * 60 * 1000)
282
+ (td.seconds * 1000)
283
+ (td.microseconds // 1000))
284
285
class Client(object):
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
152
(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
entry_group_state_changed)
157
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
171
# End of Avahi example code
172
173
174
def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
179
class Client(dbus.service.Object):
286
180
"""A representation of a client host served by this server.
287
288
181
Attributes:
289
_approved: bool(); 'None' if not yet approved/disapproved
290
approval_delay: datetime.timedelta(); Time to wait for approval
291
approval_duration: datetime.timedelta(); Duration of one approval
182
name: string; from the config file, used in log messages and
183
D-Bus identifiers
184
fingerprint: string (40 or 32 hexadecimal digits); used to
185
uniquely identify the client
186
secret: bytestring; sent verbatim (over TLS) to client
187
host: string; available for use by the checker command
188
created: datetime.datetime(); (UTC) object creation
189
last_enabled: datetime.datetime(); (UTC)
190
enabled: bool()
191
last_checked_ok: datetime.datetime(); (UTC) or None
192
timeout: datetime.timedelta(); How long from last_checked_ok
193
until this client is invalid
194
interval: datetime.timedelta(); How often to start a new checker
195
disable_hook: If set, called by disable() as disable_hook(self)
292
196
checker: subprocess.Popen(); a running checker process used
293
197
to see if the client lives.
294
198
'None' if no process is running.
295
checker_callback_tag: a gobject event source tag, or None
296
checker_command: string; External command which is run to check
297
if client lives. %() expansions are done at
199
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
201
checker_callback_tag: - '' -
202
checker_command: string; External command which is run to check if
203
client lives. %() expansions are done at
298
204
runtime with vars(self) as dict, so that for
299
205
instance %(name)s can be used in the command.
300
checker_initiator_tag: a gobject event source tag, or None
301
created: datetime.datetime(); (UTC) object creation
302
client_structure: Object describing what attributes a client has
303
and is used for storing the client at exit
304
current_checker_command: string; current running checker_command
305
disable_initiator_tag: a gobject event source tag, or None
306
enabled: bool()
307
fingerprint: string (40 or 32 hexadecimal digits); used to
308
uniquely identify the client
309
host: string; available for use by the checker command
310
interval: datetime.timedelta(); How often to start a new checker
311
last_approval_request: datetime.datetime(); (UTC) or None
312
last_checked_ok: datetime.datetime(); (UTC) or None
313
last_checker_status: integer between 0 and 255 reflecting exit
314
status of last checker. -1 reflect crashed
315
checker, or None.
316
last_enabled: datetime.datetime(); (UTC)
317
name: string; from the config file, used in log messages and
318
D-Bus identifiers
319
secret: bytestring; sent verbatim (over TLS) to client
320
timeout: datetime.timedelta(); How long from last_checked_ok
321
until this client is disabled
322
extended_timeout: extra long timeout when password has been sent
323
runtime_expansions: Allowed attributes for runtime expansion.
324
expires: datetime.datetime(); time (UTC) when a client will be
325
disabled, or None
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
326
208
"""
327
328
runtime_expansions = ("approval_delay", "approval_duration",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
331
"last_enabled", "name", "timeout")
332
333
209
def timeout_milliseconds(self):
334
210
"Return the 'timeout' attribute in milliseconds"
335
return _timedelta_to_milliseconds(self.timeout)
336
337
def extended_timeout_milliseconds(self):
338
"Return the 'extended_timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.extended_timeout)
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
340
214
341
215
def interval_milliseconds(self):
342
216
"Return the 'interval' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.interval)
344
345
def approval_delay_milliseconds(self):
346
return _timedelta_to_milliseconds(self.approval_delay)
347
348
def __init__(self, name = None, config=None):
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
220
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
349
223
"""Note: the 'checker' key in 'config' sets the
350
224
'checker_command' attribute and *not* the 'checker'
351
225
attribute."""
352
226
self.name = name
353
227
if config is None:
354
228
config = {}
355
logger.debug("Creating client %r", self.name)
229
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
356
231
# Uppercase and remove spaces from fingerprint for later
357
232
# comparison purposes with return value from the fingerprint()
358
233
# function
359
234
self.fingerprint = (config["fingerprint"].upper()
360
.replace(" ", ""))
361
logger.debug(" Fingerprint: %s", self.fingerprint)
235
.replace(u" ", u""))
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
362
237
if "secret" in config:
363
self.secret = config["secret"].decode("base64")
238
self.secret = config["secret"].decode(u"base64")
364
239
elif "secfile" in config:
365
with open(os.path.expanduser(os.path.expandvars
366
(config["secfile"])),
367
"rb") as secfile:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
368
243
self.secret = secfile.read()
369
244
else:
370
raise TypeError("No secret or secfile for client %s"
245
raise TypeError(u"No secret or secfile for client %s"
371
246
% self.name)
372
247
self.host = config.get("host", "")
373
248
self.created = datetime.datetime.utcnow()
374
self.enabled = True
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
377
251
self.last_checked_ok = None
378
self.last_checker_status = None
379
252
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
382
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
383
255
self.checker = None
384
256
self.checker_initiator_tag = None
385
257
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
387
258
self.checker_callback_tag = None
388
259
self.checker_command = config["checker"]
389
self.current_checker_command = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
392
True)
393
self.approvals_pending = 0
394
self.approval_delay = string_to_delta(
395
config["approval_delay"])
396
self.approval_duration = string_to_delta(
397
config["approval_duration"])
398
self.changedstate = (multiprocessing_manager
399
.Condition(multiprocessing_manager
400
.Lock()))
401
self.client_structure = [attr for attr
402
in self.__dict__.iterkeys()
403
if not attr.startswith("_")]
404
self.client_structure.append("client_structure")
405
406
407
for name, t in inspect.getmembers(type(self),
408
lambda obj:
409
isinstance(obj,
410
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()
260
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
418
270
419
271
def enable(self):
420
272
"""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
273
self.last_enabled = datetime.datetime.utcnow()
274
# Schedule a new checker to be started an 'interval' from now,
275
# and every interval from then on.
276
self.checker_initiator_tag = (gobject.timeout_add
277
(self.interval_milliseconds(),
278
self.start_checker))
279
# Also start a new checker *right now*.
280
self.start_checker()
281
# Schedule a disable() when 'timeout' has passed
282
self.disable_initiator_tag = (gobject.timeout_add
283
(self.timeout_milliseconds(),
284
self.disable))
426
285
self.enabled = True
427
self.last_enabled = datetime.datetime.utcnow()
428
self.init_checker()
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
429
293
430
def disable(self, quiet=True):
294
def disable(self):
431
295
"""Disable this client."""
432
296
if not getattr(self, "enabled", False):
433
297
return False
434
if not quiet:
435
self.send_changedstate()
436
if not quiet:
437
logger.info("Disabling client %s", self.name)
298
logger.info(u"Disabling client %s", self.name)
438
299
if getattr(self, "disable_initiator_tag", False):
439
300
gobject.source_remove(self.disable_initiator_tag)
440
301
self.disable_initiator_tag = None
441
self.expires = None
442
302
if getattr(self, "checker_initiator_tag", False):
443
303
gobject.source_remove(self.checker_initiator_tag)
444
304
self.checker_initiator_tag = None
445
305
self.stop_checker()
306
if self.disable_hook:
307
self.disable_hook(self)
446
308
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
447
313
# Do not run this again if called by a gobject.timeout_add
448
314
return False
449
315
450
316
def __del__(self):
317
self.disable_hook = None
451
318
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
319
467
320
def checker_callback(self, pid, condition, command):
468
321
"""The checker has completed, so take appropriate actions."""
469
322
self.checker_callback_tag = None
470
323
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
471
328
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",
329
exitstatus = os.WEXITSTATUS(condition)
330
if exitstatus == 0:
331
logger.info(u"Checker for %(name)s succeeded",
475
332
vars(self))
476
333
self.checked_ok()
477
334
else:
478
logger.info("Checker for %(name)s failed",
335
logger.info(u"Checker for %(name)s failed",
479
336
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
480
342
else:
481
self.last_checker_status = -1
482
logger.warning("Checker for %(name)s crashed?",
343
logger.warning(u"Checker for %(name)s crashed?",
483
344
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
484
350
485
def checked_ok(self, timeout=None):
351
def checked_ok(self):
486
352
"""Bump up the timeout for this client.
487
488
353
This should only be called when the client has been seen,
489
354
alive and well.
490
355
"""
491
if timeout is None:
492
timeout = self.timeout
493
356
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()
357
gobject.source_remove(self.disable_initiator_tag)
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
504
367
505
368
def start_checker(self):
506
369
"""Start a new checker subprocess if one is not running.
507
508
370
If a checker already exists, leave it running and do
509
371
nothing."""
510
372
# The reason for not killing a running checker is that if we
513
375
# client would inevitably timeout, since no checker would get
514
376
# a chance to run to completion. If we instead leave running
515
377
# 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
378
# than 'timeout' for the client to be declared invalid, which
379
# is as it should be.
533
380
if self.checker is None:
534
381
try:
535
382
# In case checker_command has exactly one % operator
536
383
command = self.checker_command % self.host
537
384
except TypeError:
538
385
# 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
386
escaped_attrs = dict((key, re.escape(str(val)))
387
for key, val in
388
vars(self).iteritems())
547
389
try:
548
390
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)
391
except TypeError, error:
392
logger.error(u'Could not format string "%s":'
393
u' %s', self.checker_command, error)
552
394
return True # Try again later
553
self.current_checker_command = command
554
395
try:
555
logger.info("Starting checker %r for %s",
396
logger.info(u"Starting checker %r for %s",
556
397
command, self.name)
557
398
# We don't need to redirect stdout and stderr, since
558
399
# in normal mode, that is already done by daemon(),
561
402
self.checker = subprocess.Popen(command,
562
403
close_fds=True,
563
404
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
564
411
self.checker_callback_tag = (gobject.child_watch_add
565
412
(self.checker.pid,
566
413
self.checker_callback,
567
414
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",
415
except OSError, error:
416
logger.error(u"Failed to start subprocess: %s",
576
417
error)
577
418
# Re-run this periodically if run by gobject.timeout_add
578
419
return True
584
425
self.checker_callback_tag = None
585
426
if getattr(self, "checker", None) is None:
586
427
return
587
logger.debug("Stopping checker for %(name)s", vars(self))
428
logger.debug(u"Stopping checker for %(name)s", vars(self))
588
429
try:
589
430
os.kill(self.checker.pid, signal.SIGTERM)
590
#time.sleep(0.5)
431
#os.sleep(0.5)
591
432
#if self.checker.poll() is None:
592
433
# os.kill(self.checker.pid, signal.SIGKILL)
593
except OSError as error:
434
except OSError, error:
594
435
if error.errno != errno.ESRCH: # No such process
595
436
raise
596
437
self.checker = None
597
598
# Encrypts a client secret and stores it in a varible
599
# encrypted_secret
600
def encrypt_secret(self, key):
601
# Encryption-key need to be of a specific size, so we hash
602
# supplied key
603
hasheng = hashlib.sha256()
604
hasheng.update(key)
605
encryptionkey = hasheng.digest()
606
607
# Create validation hash so we know at decryption if it was
608
# sucessful
609
hasheng = hashlib.sha256()
610
hasheng.update(self.secret)
611
validationhash = hasheng.digest()
612
613
# Encrypt secret
614
iv = os.urandom(Crypto.Cipher.AES.block_size)
615
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
616
Crypto.Cipher.AES.MODE_CFB, iv)
617
ciphertext = ciphereng.encrypt(validationhash+self.secret)
618
self.encrypted_secret = (ciphertext, iv)
619
620
# Decrypt a encrypted client secret
621
def decrypt_secret(self, key):
622
# Decryption-key need to be of a specific size, so we hash
623
# supplied key
624
hasheng = hashlib.sha256()
625
hasheng.update(key)
626
encryptionkey = hasheng.digest()
627
628
# Decrypt encrypted secret
629
ciphertext, iv = self.encrypted_secret
630
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
631
Crypto.Cipher.AES.MODE_CFB, iv)
632
plain = ciphereng.decrypt(ciphertext)
633
634
# Validate decrypted secret to know if it was succesful
635
hasheng = hashlib.sha256()
636
validationhash = plain[:hasheng.digest_size]
637
secret = plain[hasheng.digest_size:]
638
hasheng.update(secret)
639
640
# If validation fails, we use key as new secret. Otherwise, we
641
# use the decrypted secret
642
if hasheng.digest() == validationhash:
643
self.secret = secret
644
else:
645
self.secret = key
646
del self.encrypted_secret
647
648
649
def dbus_service_property(dbus_interface, signature="v",
650
access="readwrite", byte_arrays=False):
651
"""Decorators for marking methods of a DBusObjectWithProperties to
652
become properties on the D-Bus.
653
654
The decorated method will be called with no arguments by "Get"
655
and with one argument by "Set".
656
657
The parameters, where they are supported, are the same as
658
dbus.service.method, except there is only "signature", since the
659
type from Get() and the type sent to Set() is the same.
660
"""
661
# Encoding deeply encoded byte arrays is not supported yet by the
662
# "Set" method, so we fail early here:
663
if byte_arrays and signature != "ay":
664
raise ValueError("Byte arrays not supported for non-'ay'"
665
" signature %r" % signature)
666
def decorator(func):
667
func._dbus_is_property = True
668
func._dbus_interface = dbus_interface
669
func._dbus_signature = signature
670
func._dbus_access = access
671
func._dbus_name = func.__name__
672
if func._dbus_name.endswith("_dbus_property"):
673
func._dbus_name = func._dbus_name[:-14]
674
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
675
return func
676
return decorator
677
678
679
class DBusPropertyException(dbus.exceptions.DBusException):
680
"""A base class for D-Bus property-related exceptions
681
"""
682
def __unicode__(self):
683
return unicode(str(self))
684
685
686
class DBusPropertyAccessException(DBusPropertyException):
687
"""A property's access permissions disallows an operation.
688
"""
689
pass
690
691
692
class DBusPropertyNotFound(DBusPropertyException):
693
"""An attempt was made to access a non-existing property.
694
"""
695
pass
696
697
698
class DBusObjectWithProperties(dbus.service.Object):
699
"""A D-Bus object with properties.
700
701
Classes inheriting from this can use the dbus_service_property
702
decorator to expose methods as D-Bus properties. It exposes the
703
standard Get(), Set(), and GetAll() methods on the D-Bus.
704
"""
705
706
@staticmethod
707
def _is_dbus_property(obj):
708
return getattr(obj, "_dbus_is_property", False)
709
710
def _get_all_dbus_properties(self):
711
"""Returns a generator of (name, attribute) pairs
712
"""
713
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
714
for cls in self.__class__.__mro__
715
for name, prop in
716
inspect.getmembers(cls, self._is_dbus_property))
717
718
def _get_dbus_property(self, interface_name, property_name):
719
"""Returns a bound method if one exists which is a D-Bus
720
property with the specified name and interface.
721
"""
722
for cls in self.__class__.__mro__:
723
for name, value in (inspect.getmembers
724
(cls, self._is_dbus_property)):
725
if (value._dbus_name == property_name
726
and value._dbus_interface == interface_name):
727
return value.__get__(self)
728
729
# No such property
730
raise DBusPropertyNotFound(self.dbus_object_path + ":"
731
+ interface_name + "."
732
+ property_name)
733
734
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
735
out_signature="v")
736
def Get(self, interface_name, property_name):
737
"""Standard D-Bus property Get() method, see D-Bus standard.
738
"""
739
prop = self._get_dbus_property(interface_name, property_name)
740
if prop._dbus_access == "write":
741
raise DBusPropertyAccessException(property_name)
742
value = prop()
743
if not hasattr(value, "variant_level"):
744
return value
745
return type(value)(value, variant_level=value.variant_level+1)
746
747
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
748
def Set(self, interface_name, property_name, value):
749
"""Standard D-Bus property Set() method, see D-Bus standard.
750
"""
751
prop = self._get_dbus_property(interface_name, property_name)
752
if prop._dbus_access == "read":
753
raise DBusPropertyAccessException(property_name)
754
if prop._dbus_get_args_options["byte_arrays"]:
755
# The byte_arrays option is not supported yet on
756
# signatures other than "ay".
757
if prop._dbus_signature != "ay":
758
raise ValueError
759
value = dbus.ByteArray(''.join(unichr(byte)
760
for byte in value))
761
prop(value)
762
763
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
764
out_signature="a{sv}")
765
def GetAll(self, interface_name):
766
"""Standard D-Bus property GetAll() method, see D-Bus
767
standard.
768
769
Note: Will not include properties with access="write".
770
"""
771
all = {}
772
for name, prop in self._get_all_dbus_properties():
773
if (interface_name
774
and interface_name != prop._dbus_interface):
775
# Interface non-empty but did not match
776
continue
777
# Ignore write-only properties
778
if prop._dbus_access == "write":
779
continue
780
value = prop()
781
if not hasattr(value, "variant_level"):
782
all[name] = value
783
continue
784
all[name] = type(value)(value, variant_level=
785
value.variant_level+1)
786
return dbus.Dictionary(all, signature="sv")
787
788
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
789
out_signature="s",
790
path_keyword='object_path',
791
connection_keyword='connection')
792
def Introspect(self, object_path, connection):
793
"""Standard D-Bus method, overloaded to insert property tags.
794
"""
795
xmlstring = dbus.service.Object.Introspect(self, object_path,
796
connection)
797
try:
798
document = xml.dom.minidom.parseString(xmlstring)
799
def make_tag(document, name, prop):
800
e = document.createElement("property")
801
e.setAttribute("name", name)
802
e.setAttribute("type", prop._dbus_signature)
803
e.setAttribute("access", prop._dbus_access)
804
return e
805
for if_tag in document.getElementsByTagName("interface"):
806
for tag in (make_tag(document, name, prop)
807
for name, prop
808
in self._get_all_dbus_properties()
809
if prop._dbus_interface
810
== if_tag.getAttribute("name")):
811
if_tag.appendChild(tag)
812
# Add the names to the return values for the
813
# "org.freedesktop.DBus.Properties" methods
814
if (if_tag.getAttribute("name")
815
== "org.freedesktop.DBus.Properties"):
816
for cn in if_tag.getElementsByTagName("method"):
817
if cn.getAttribute("name") == "Get":
818
for arg in cn.getElementsByTagName("arg"):
819
if (arg.getAttribute("direction")
820
== "out"):
821
arg.setAttribute("name", "value")
822
elif cn.getAttribute("name") == "GetAll":
823
for arg in cn.getElementsByTagName("arg"):
824
if (arg.getAttribute("direction")
825
== "out"):
826
arg.setAttribute("name", "props")
827
xmlstring = document.toxml("utf-8")
828
document.unlink()
829
except (AttributeError, xml.dom.DOMException,
830
xml.parsers.expat.ExpatError) as error:
831
logger.error("Failed to override Introspection method",
832
error)
833
return xmlstring
834
835
836
def datetime_to_dbus (dt, variant_level=0):
837
"""Convert a UTC datetime.datetime() to a D-Bus type."""
838
if dt is None:
839
return dbus.String("", variant_level = variant_level)
840
return dbus.String(dt.isoformat(),
841
variant_level=variant_level)
842
843
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
844
.__metaclass__):
845
"""Applied to an empty subclass of a D-Bus object, this metaclass
846
will add additional D-Bus attributes matching a certain pattern.
847
"""
848
def __new__(mcs, name, bases, attr):
849
# Go through all the base classes which could have D-Bus
850
# methods, signals, or properties in them
851
for base in (b for b in bases
852
if issubclass(b, dbus.service.Object)):
853
# Go though all attributes of the base class
854
for attrname, attribute in inspect.getmembers(base):
855
# Ignore non-D-Bus attributes, and D-Bus attributes
856
# with the wrong interface name
857
if (not hasattr(attribute, "_dbus_interface")
858
or not attribute._dbus_interface
859
.startswith("se.recompile.Mandos")):
860
continue
861
# Create an alternate D-Bus interface name based on
862
# the current name
863
alt_interface = (attribute._dbus_interface
864
.replace("se.recompile.Mandos",
865
"se.bsnet.fukt.Mandos"))
866
# Is this a D-Bus signal?
867
if getattr(attribute, "_dbus_is_signal", False):
868
# Extract the original non-method function by
869
# black magic
870
nonmethod_func = (dict(
871
zip(attribute.func_code.co_freevars,
872
attribute.__closure__))["func"]
873
.cell_contents)
874
# Create a new, but exactly alike, function
875
# object, and decorate it to be a new D-Bus signal
876
# with the alternate D-Bus interface name
877
new_function = (dbus.service.signal
878
(alt_interface,
879
attribute._dbus_signature)
880
(types.FunctionType(
881
nonmethod_func.func_code,
882
nonmethod_func.func_globals,
883
nonmethod_func.func_name,
884
nonmethod_func.func_defaults,
885
nonmethod_func.func_closure)))
886
# Define a creator of a function to call both the
887
# old and new functions, so both the old and new
888
# signals gets sent when the function is called
889
def fixscope(func1, func2):
890
"""This function is a scope container to pass
891
func1 and func2 to the "call_both" function
892
outside of its arguments"""
893
def call_both(*args, **kwargs):
894
"""This function will emit two D-Bus
895
signals by calling func1 and func2"""
896
func1(*args, **kwargs)
897
func2(*args, **kwargs)
898
return call_both
899
# Create the "call_both" function and add it to
900
# the class
901
attr[attrname] = fixscope(attribute,
902
new_function)
903
# Is this a D-Bus method?
904
elif getattr(attribute, "_dbus_is_method", False):
905
# Create a new, but exactly alike, function
906
# object. Decorate it to be a new D-Bus method
907
# with the alternate D-Bus interface name. Add it
908
# to the class.
909
attr[attrname] = (dbus.service.method
910
(alt_interface,
911
attribute._dbus_in_signature,
912
attribute._dbus_out_signature)
913
(types.FunctionType
914
(attribute.func_code,
915
attribute.func_globals,
916
attribute.func_name,
917
attribute.func_defaults,
918
attribute.func_closure)))
919
# Is this a D-Bus property?
920
elif getattr(attribute, "_dbus_is_property", False):
921
# Create a new, but exactly alike, function
922
# object, and decorate it to be a new D-Bus
923
# property with the alternate D-Bus interface
924
# name. Add it to the class.
925
attr[attrname] = (dbus_service_property
926
(alt_interface,
927
attribute._dbus_signature,
928
attribute._dbus_access,
929
attribute
930
._dbus_get_args_options
931
["byte_arrays"])
932
(types.FunctionType
933
(attribute.func_code,
934
attribute.func_globals,
935
attribute.func_name,
936
attribute.func_defaults,
937
attribute.func_closure)))
938
return type.__new__(mcs, name, bases, attr)
939
940
class ClientDBus(Client, DBusObjectWithProperties):
941
"""A Client class using D-Bus
942
943
Attributes:
944
dbus_object_path: dbus.ObjectPath
945
bus: dbus.SystemBus()
946
"""
947
948
runtime_expansions = (Client.runtime_expansions
949
+ ("dbus_object_path",))
950
951
# dbus.service.Object doesn't use super(), so we can't either.
952
953
def __init__(self, bus = None, *args, **kwargs):
954
self.bus = bus
955
self._approvals_pending = 0
956
Client.__init__(self, *args, **kwargs)
957
self.add_to_dbus()
958
959
def add_to_dbus(self):
960
# Only now, when this client is initialized, can it show up on
961
# the D-Bus
962
client_object_name = unicode(self.name).translate(
963
{ord("."): ord("_"),
964
ord("-"): ord("_")})
965
self.dbus_object_path = (dbus.ObjectPath
966
("/clients/" + client_object_name))
967
DBusObjectWithProperties.__init__(self, self.bus,
968
self.dbus_object_path)
969
970
def notifychangeproperty(transform_func,
971
dbus_name, type_func=lambda x: x,
972
variant_level=1):
973
""" Modify a variable so that it's a property which announces
974
its changes to DBus.
975
976
transform_fun: Function that takes a value and a variant_level
977
and transforms it to a D-Bus type.
978
dbus_name: D-Bus name of the variable
979
type_func: Function that transform the value before sending it
980
to the D-Bus. Default: no transform
981
variant_level: D-Bus variant level. Default: 1
982
"""
983
attrname = "_{0}".format(dbus_name)
984
def setter(self, value):
985
if hasattr(self, "dbus_object_path"):
986
if (not hasattr(self, attrname) or
987
type_func(getattr(self, attrname, None))
988
!= type_func(value)):
989
dbus_value = transform_func(type_func(value),
990
variant_level
991
=variant_level)
992
self.PropertyChanged(dbus.String(dbus_name),
993
dbus_value)
994
setattr(self, attrname, value)
995
996
return property(lambda self: getattr(self, attrname), setter)
997
998
999
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1000
approvals_pending = notifychangeproperty(dbus.Boolean,
1001
"ApprovalPending",
1002
type_func = bool)
1003
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1004
last_enabled = notifychangeproperty(datetime_to_dbus,
1005
"LastEnabled")
1006
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1007
type_func = lambda checker:
1008
checker is not None)
1009
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1010
"LastCheckedOK")
1011
last_approval_request = notifychangeproperty(
1012
datetime_to_dbus, "LastApprovalRequest")
1013
approved_by_default = notifychangeproperty(dbus.Boolean,
1014
"ApprovedByDefault")
1015
approval_delay = notifychangeproperty(dbus.UInt16,
1016
"ApprovalDelay",
1017
type_func =
1018
_timedelta_to_milliseconds)
1019
approval_duration = notifychangeproperty(
1020
dbus.UInt16, "ApprovalDuration",
1021
type_func = _timedelta_to_milliseconds)
1022
host = notifychangeproperty(dbus.String, "Host")
1023
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1024
type_func =
1025
_timedelta_to_milliseconds)
1026
extended_timeout = notifychangeproperty(
1027
dbus.UInt16, "ExtendedTimeout",
1028
type_func = _timedelta_to_milliseconds)
1029
interval = notifychangeproperty(dbus.UInt16,
1030
"Interval",
1031
type_func =
1032
_timedelta_to_milliseconds)
1033
checker_command = notifychangeproperty(dbus.String, "Checker")
1034
1035
del notifychangeproperty
1036
1037
def __del__(self, *args, **kwargs):
1038
try:
1039
self.remove_from_connection()
1040
except LookupError:
1041
pass
1042
if hasattr(DBusObjectWithProperties, "__del__"):
1043
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1044
Client.__del__(self, *args, **kwargs)
1045
1046
def checker_callback(self, pid, condition, command,
1047
*args, **kwargs):
1048
self.checker_callback_tag = None
1049
self.checker = None
1050
if os.WIFEXITED(condition):
1051
exitstatus = os.WEXITSTATUS(condition)
1052
# Emit D-Bus signal
1053
self.CheckerCompleted(dbus.Int16(exitstatus),
1054
dbus.Int64(condition),
1055
dbus.String(command))
1056
else:
1057
# Emit D-Bus signal
1058
self.CheckerCompleted(dbus.Int16(-1),
1059
dbus.Int64(condition),
1060
dbus.String(command))
1061
1062
return Client.checker_callback(self, pid, condition, command,
1063
*args, **kwargs)
1064
1065
def start_checker(self, *args, **kwargs):
1066
old_checker = self.checker
1067
if self.checker is not None:
1068
old_checker_pid = self.checker.pid
1069
else:
1070
old_checker_pid = None
1071
r = Client.start_checker(self, *args, **kwargs)
1072
# Only if new checker process was started
1073
if (self.checker is not None
1074
and old_checker_pid != self.checker.pid):
1075
# Emit D-Bus signal
1076
self.CheckerStarted(self.current_checker_command)
1077
return r
1078
1079
def _reset_approved(self):
1080
self._approved = None
1081
return False
1082
1083
def approve(self, value=True):
1084
self.send_changedstate()
1085
self._approved = value
1086
gobject.timeout_add(_timedelta_to_milliseconds
1087
(self.approval_duration),
1088
self._reset_approved)
1089
1090
1091
## D-Bus methods, signals & properties
1092
_interface = "se.recompile.Mandos.Client"
1093
1094
## Signals
438
if self.use_dbus:
439
self.PropertyChanged(dbus.String(u"checker_running"),
440
dbus.Boolean(False, variant_level=1))
441
442
def still_valid(self):
443
"""Has the timeout not yet passed for this client?"""
444
if not getattr(self, "enabled", False):
445
return False
446
now = datetime.datetime.utcnow()
447
if self.last_checked_ok is None:
448
return now < (self.created + self.timeout)
449
else:
450
return now < (self.last_checked_ok + self.timeout)
451
452
## D-Bus methods & signals
453
_interface = u"se.bsnet.fukt.Mandos.Client"
454
455
# CheckedOK - method
456
CheckedOK = dbus.service.method(_interface)(checked_ok)
457
CheckedOK.__name__ = "CheckedOK"
1095
458
1096
459
# CheckerCompleted - signal
1097
460
@dbus.service.signal(_interface, signature="nxs")
1105
468
"D-Bus signal"
1106
469
pass
1107
470
471
# GetAllProperties - method
472
@dbus.service.method(_interface, out_signature="a{sv}")
473
def GetAllProperties(self):
474
"D-Bus method"
475
return dbus.Dictionary({
476
dbus.String("name"):
477
dbus.String(self.name, variant_level=1),
478
dbus.String("fingerprint"):
479
dbus.String(self.fingerprint, variant_level=1),
480
dbus.String("host"):
481
dbus.String(self.host, variant_level=1),
482
dbus.String("created"):
483
_datetime_to_dbus(self.created, variant_level=1),
484
dbus.String("last_enabled"):
485
(_datetime_to_dbus(self.last_enabled,
486
variant_level=1)
487
if self.last_enabled is not None
488
else dbus.Boolean(False, variant_level=1)),
489
dbus.String("enabled"):
490
dbus.Boolean(self.enabled, variant_level=1),
491
dbus.String("last_checked_ok"):
492
(_datetime_to_dbus(self.last_checked_ok,
493
variant_level=1)
494
if self.last_checked_ok is not None
495
else dbus.Boolean (False, variant_level=1)),
496
dbus.String("timeout"):
497
dbus.UInt64(self.timeout_milliseconds(),
498
variant_level=1),
499
dbus.String("interval"):
500
dbus.UInt64(self.interval_milliseconds(),
501
variant_level=1),
502
dbus.String("checker"):
503
dbus.String(self.checker_command,
504
variant_level=1),
505
dbus.String("checker_running"):
506
dbus.Boolean(self.checker is not None,
507
variant_level=1),
508
dbus.String("object_path"):
509
dbus.ObjectPath(self.dbus_object_path,
510
variant_level=1)
511
}, signature="sv")
512
513
# IsStillValid - method
514
IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
(still_valid))
516
IsStillValid.__name__ = "IsStillValid"
517
1108
518
# PropertyChanged - signal
1109
519
@dbus.service.signal(_interface, signature="sv")
1110
520
def PropertyChanged(self, property, value):
1111
521
"D-Bus signal"
1112
522
pass
1113
523
1114
# GotSecret - signal
1115
@dbus.service.signal(_interface)
1116
def GotSecret(self):
1117
"""D-Bus signal
1118
Is sent after a successful transfer of secret from the Mandos
1119
server to mandos-client
1120
"""
1121
pass
1122
1123
# Rejected - signal
1124
@dbus.service.signal(_interface, signature="s")
1125
def Rejected(self, reason):
1126
"D-Bus signal"
1127
pass
1128
1129
# NeedApproval - signal
1130
@dbus.service.signal(_interface, signature="tb")
1131
def NeedApproval(self, timeout, default):
1132
"D-Bus signal"
1133
return self.need_approval()
1134
1135
## Methods
1136
1137
# Approve - method
1138
@dbus.service.method(_interface, in_signature="b")
1139
def Approve(self, value):
1140
self.approve(value)
1141
1142
# CheckedOK - method
1143
@dbus.service.method(_interface)
1144
def CheckedOK(self):
1145
self.checked_ok()
524
# SetChecker - method
525
@dbus.service.method(_interface, in_signature="s")
526
def SetChecker(self, checker):
527
"D-Bus setter method"
528
self.checker_command = checker
529
# Emit D-Bus signal
530
self.PropertyChanged(dbus.String(u"checker"),
531
dbus.String(self.checker_command,
532
variant_level=1))
533
534
# SetHost - method
535
@dbus.service.method(_interface, in_signature="s")
536
def SetHost(self, host):
537
"D-Bus setter method"
538
self.host = host
539
# Emit D-Bus signal
540
self.PropertyChanged(dbus.String(u"host"),
541
dbus.String(self.host, variant_level=1))
542
543
# SetInterval - method
544
@dbus.service.method(_interface, in_signature="t")
545
def SetInterval(self, milliseconds):
546
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
547
# Emit D-Bus signal
548
self.PropertyChanged(dbus.String(u"interval"),
549
(dbus.UInt64(self.interval_milliseconds(),
550
variant_level=1)))
551
552
# SetSecret - method
553
@dbus.service.method(_interface, in_signature="ay",
554
byte_arrays=True)
555
def SetSecret(self, secret):
556
"D-Bus setter method"
557
self.secret = str(secret)
558
559
# SetTimeout - method
560
@dbus.service.method(_interface, in_signature="t")
561
def SetTimeout(self, milliseconds):
562
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
563
# Emit D-Bus signal
564
self.PropertyChanged(dbus.String(u"timeout"),
565
(dbus.UInt64(self.timeout_milliseconds(),
566
variant_level=1)))
1146
567
1147
568
# Enable - method
1148
@dbus.service.method(_interface)
1149
def Enable(self):
1150
"D-Bus method"
1151
self.enable()
569
Enable = dbus.service.method(_interface)(enable)
570
Enable.__name__ = "Enable"
1152
571
1153
572
# StartChecker - method
1154
573
@dbus.service.method(_interface)
1163
582
self.disable()
1164
583
1165
584
# StopChecker - method
1166
@dbus.service.method(_interface)
1167
def StopChecker(self):
1168
self.stop_checker()
1169
1170
## Properties
1171
1172
# ApprovalPending - property
1173
@dbus_service_property(_interface, signature="b", access="read")
1174
def ApprovalPending_dbus_property(self):
1175
return dbus.Boolean(bool(self.approvals_pending))
1176
1177
# ApprovedByDefault - property
1178
@dbus_service_property(_interface, signature="b",
1179
access="readwrite")
1180
def ApprovedByDefault_dbus_property(self, value=None):
1181
if value is None: # get
1182
return dbus.Boolean(self.approved_by_default)
1183
self.approved_by_default = bool(value)
1184
1185
# ApprovalDelay - property
1186
@dbus_service_property(_interface, signature="t",
1187
access="readwrite")
1188
def ApprovalDelay_dbus_property(self, value=None):
1189
if value is None: # get
1190
return dbus.UInt64(self.approval_delay_milliseconds())
1191
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1192
1193
# ApprovalDuration - property
1194
@dbus_service_property(_interface, signature="t",
1195
access="readwrite")
1196
def ApprovalDuration_dbus_property(self, value=None):
1197
if value is None: # get
1198
return dbus.UInt64(_timedelta_to_milliseconds(
1199
self.approval_duration))
1200
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1201
1202
# Name - property
1203
@dbus_service_property(_interface, signature="s", access="read")
1204
def Name_dbus_property(self):
1205
return dbus.String(self.name)
1206
1207
# Fingerprint - property
1208
@dbus_service_property(_interface, signature="s", access="read")
1209
def Fingerprint_dbus_property(self):
1210
return dbus.String(self.fingerprint)
1211
1212
# Host - property
1213
@dbus_service_property(_interface, signature="s",
1214
access="readwrite")
1215
def Host_dbus_property(self, value=None):
1216
if value is None: # get
1217
return dbus.String(self.host)
1218
self.host = value
1219
1220
# Created - property
1221
@dbus_service_property(_interface, signature="s", access="read")
1222
def Created_dbus_property(self):
1223
return dbus.String(datetime_to_dbus(self.created))
1224
1225
# LastEnabled - property
1226
@dbus_service_property(_interface, signature="s", access="read")
1227
def LastEnabled_dbus_property(self):
1228
return datetime_to_dbus(self.last_enabled)
1229
1230
# Enabled - property
1231
@dbus_service_property(_interface, signature="b",
1232
access="readwrite")
1233
def Enabled_dbus_property(self, value=None):
1234
if value is None: # get
1235
return dbus.Boolean(self.enabled)
1236
if value:
1237
self.enable()
1238
else:
1239
self.disable()
1240
1241
# LastCheckedOK - property
1242
@dbus_service_property(_interface, signature="s",
1243
access="readwrite")
1244
def LastCheckedOK_dbus_property(self, value=None):
1245
if value is not None:
1246
self.checked_ok()
1247
return
1248
return datetime_to_dbus(self.last_checked_ok)
1249
1250
# Expires - property
1251
@dbus_service_property(_interface, signature="s", access="read")
1252
def Expires_dbus_property(self):
1253
return datetime_to_dbus(self.expires)
1254
1255
# LastApprovalRequest - property
1256
@dbus_service_property(_interface, signature="s", access="read")
1257
def LastApprovalRequest_dbus_property(self):
1258
return datetime_to_dbus(self.last_approval_request)
1259
1260
# Timeout - property
1261
@dbus_service_property(_interface, signature="t",
1262
access="readwrite")
1263
def Timeout_dbus_property(self, value=None):
1264
if value is None: # get
1265
return dbus.UInt64(self.timeout_milliseconds())
1266
self.timeout = datetime.timedelta(0, 0, 0, value)
1267
if getattr(self, "disable_initiator_tag", None) is None:
1268
return
1269
# Reschedule timeout
1270
gobject.source_remove(self.disable_initiator_tag)
1271
self.disable_initiator_tag = None
1272
self.expires = None
1273
time_to_die = _timedelta_to_milliseconds((self
1274
.last_checked_ok
1275
+ self.timeout)
1276
- datetime.datetime
1277
.utcnow())
1278
if time_to_die <= 0:
1279
# The timeout has passed
1280
self.disable()
1281
else:
1282
self.expires = (datetime.datetime.utcnow()
1283
+ datetime.timedelta(milliseconds =
1284
time_to_die))
1285
self.disable_initiator_tag = (gobject.timeout_add
1286
(time_to_die, self.disable))
1287
1288
# ExtendedTimeout - property
1289
@dbus_service_property(_interface, signature="t",
1290
access="readwrite")
1291
def ExtendedTimeout_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.UInt64(self.extended_timeout_milliseconds())
1294
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1295
1296
# Interval - property
1297
@dbus_service_property(_interface, signature="t",
1298
access="readwrite")
1299
def Interval_dbus_property(self, value=None):
1300
if value is None: # get
1301
return dbus.UInt64(self.interval_milliseconds())
1302
self.interval = datetime.timedelta(0, 0, 0, value)
1303
if getattr(self, "checker_initiator_tag", None) is None:
1304
return
1305
# Reschedule checker run
1306
gobject.source_remove(self.checker_initiator_tag)
1307
self.checker_initiator_tag = (gobject.timeout_add
1308
(value, self.start_checker))
1309
self.start_checker() # Start one now, too
1310
1311
# Checker - property
1312
@dbus_service_property(_interface, signature="s",
1313
access="readwrite")
1314
def Checker_dbus_property(self, value=None):
1315
if value is None: # get
1316
return dbus.String(self.checker_command)
1317
self.checker_command = value
1318
1319
# CheckerRunning - property
1320
@dbus_service_property(_interface, signature="b",
1321
access="readwrite")
1322
def CheckerRunning_dbus_property(self, value=None):
1323
if value is None: # get
1324
return dbus.Boolean(self.checker is not None)
1325
if value:
1326
self.start_checker()
1327
else:
1328
self.stop_checker()
1329
1330
# ObjectPath - property
1331
@dbus_service_property(_interface, signature="o", access="read")
1332
def ObjectPath_dbus_property(self):
1333
return self.dbus_object_path # is already a dbus.ObjectPath
1334
1335
# Secret = property
1336
@dbus_service_property(_interface, signature="ay",
1337
access="write", byte_arrays=True)
1338
def Secret_dbus_property(self, value):
1339
self.secret = str(value)
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
1340
587
1341
588
del _interface
1342
589
1343
590
1344
class ProxyClient(object):
1345
def __init__(self, child_pipe, fpr, address):
1346
self._pipe = child_pipe
1347
self._pipe.send(('init', fpr, address))
1348
if not self._pipe.recv():
1349
raise KeyError()
1350
1351
def __getattribute__(self, name):
1352
if(name == '_pipe'):
1353
return super(ProxyClient, self).__getattribute__(name)
1354
self._pipe.send(('getattr', name))
1355
data = self._pipe.recv()
1356
if data[0] == 'data':
1357
return data[1]
1358
if data[0] == 'function':
1359
def func(*args, **kwargs):
1360
self._pipe.send(('funcall', name, args, kwargs))
1361
return self._pipe.recv()[1]
1362
return func
1363
1364
def __setattr__(self, name, value):
1365
if(name == '_pipe'):
1366
return super(ProxyClient, self).__setattr__(name, value)
1367
self._pipe.send(('setattr', name, value))
1368
1369
class ClientDBusTransitional(ClientDBus):
1370
__metaclass__ = AlternateDBusNamesMetaclass
1371
1372
class ClientHandler(socketserver.BaseRequestHandler, object):
1373
"""A class to handle client connections.
1374
1375
Instantiated once for each connection to handle it.
591
def peer_certificate(session):
592
"Return the peer's OpenPGP certificate as a bytestring"
593
# If not an OpenPGP certificate...
594
if (gnutls.library.functions
595
.gnutls_certificate_type_get(session._c_object)
596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
# ...do the normal thing
598
return session.peer_certificate
599
list_size = ctypes.c_uint(1)
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
603
if not bool(cert_list) and list_size.value != 0:
604
raise gnutls.errors.GNUTLSError("error getting peer"
605
" certificate")
606
if list_size.value == 0:
607
return None
608
cert = cert_list[0]
609
return ctypes.string_at(cert.data, cert.size)
610
611
612
def fingerprint(openpgp):
613
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
# New GnuTLS "datum" with the OpenPGP public key
615
datum = (gnutls.library.types
616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
617
ctypes.POINTER
618
(ctypes.c_ubyte)),
619
ctypes.c_uint(len(openpgp))))
620
# New empty GnuTLS certificate
621
crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
624
# Import the OpenPGP public key into the certificate
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
627
gnutls.library.constants
628
.GNUTLS_OPENPGP_FMT_RAW))
629
# Verify the self signature in the key
630
crtverify = ctypes.c_uint()
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
633
if crtverify.value != 0:
634
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
635
raise gnutls.errors.CertificateSecurityError("Verify failed")
636
# New buffer for the fingerprint
637
buf = ctypes.create_string_buffer(20)
638
buf_len = ctypes.c_size_t()
639
# Get the fingerprint from the certificate into the buffer
640
(gnutls.library.functions
641
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
ctypes.byref(buf_len)))
643
# Deinit the certificate
644
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
# Convert the buffer to a Python bytestring
646
fpr = ctypes.string_at(buf, buf_len.value)
647
# Convert the bytestring to hexadecimal notation
648
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
return hex_fpr
650
651
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
653
"""A TCP request handler class.
654
Instantiated by IPv6_TCPServer for each request to handle it.
1376
655
Note: This will run in its own forked process."""
1377
656
1378
657
def handle(self):
1379
with contextlib.closing(self.server.child_pipe) as child_pipe:
1380
logger.info("TCP connection from: %s",
1381
unicode(self.client_address))
1382
logger.debug("Pipe FD: %d",
1383
self.server.child_pipe.fileno())
1384
1385
session = (gnutls.connection
1386
.ClientSession(self.request,
1387
gnutls.connection
1388
.X509Credentials()))
1389
1390
# Note: gnutls.connection.X509Credentials is really a
1391
# generic GnuTLS certificate credentials object so long as
1392
# no X.509 keys are added to it. Therefore, we can use it
1393
# here despite using OpenPGP certificates.
1394
1395
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1396
# "+AES-256-CBC", "+SHA1",
1397
# "+COMP-NULL", "+CTYPE-OPENPGP",
1398
# "+DHE-DSS"))
1399
# Use a fallback default, since this MUST be set.
1400
priority = self.server.gnutls_priority
1401
if priority is None:
1402
priority = "NORMAL"
1403
(gnutls.library.functions
1404
.gnutls_priority_set_direct(session._c_object,
1405
priority, None))
1406
1407
# Start communication using the Mandos protocol
1408
# Get protocol number
1409
line = self.request.makefile().readline()
1410
logger.debug("Protocol version: %r", line)
1411
try:
1412
if int(line.strip().split()[0]) > 1:
1413
raise RuntimeError
1414
except (ValueError, IndexError, RuntimeError) as error:
1415
logger.error("Unknown protocol version: %s", error)
1416
return
1417
1418
# Start GnuTLS connection
1419
try:
1420
session.handshake()
1421
except gnutls.errors.GNUTLSError as error:
1422
logger.warning("Handshake failed: %s", error)
1423
# Do not run session.bye() here: the session is not
1424
# established. Just abandon the request.
1425
return
1426
logger.debug("Handshake succeeded")
1427
1428
approval_required = False
1429
try:
1430
try:
1431
fpr = self.fingerprint(self.peer_certificate
1432
(session))
1433
except (TypeError,
1434
gnutls.errors.GNUTLSError) as error:
1435
logger.warning("Bad certificate: %s", error)
1436
return
1437
logger.debug("Fingerprint: %s", fpr)
1438
1439
try:
1440
client = ProxyClient(child_pipe, fpr,
1441
self.client_address)
1442
except KeyError:
1443
return
1444
1445
if client.approval_delay:
1446
delay = client.approval_delay
1447
client.approvals_pending += 1
1448
approval_required = True
1449
1450
while True:
1451
if not client.enabled:
1452
logger.info("Client %s is disabled",
1453
client.name)
1454
if self.server.use_dbus:
1455
# Emit D-Bus signal
1456
client.Rejected("Disabled")
1457
return
1458
1459
if client._approved or not client.approval_delay:
1460
#We are approved or approval is disabled
1461
break
1462
elif client._approved is None:
1463
logger.info("Client %s needs approval",
1464
client.name)
1465
if self.server.use_dbus:
1466
# Emit D-Bus signal
1467
client.NeedApproval(
1468
client.approval_delay_milliseconds(),
1469
client.approved_by_default)
1470
else:
1471
logger.warning("Client %s was not approved",
1472
client.name)
1473
if self.server.use_dbus:
1474
# Emit D-Bus signal
1475
client.Rejected("Denied")
1476
return
1477
1478
#wait until timeout or approved
1479
time = datetime.datetime.now()
1480
client.changedstate.acquire()
1481
(client.changedstate.wait
1482
(float(client._timedelta_to_milliseconds(delay)
1483
/ 1000)))
1484
client.changedstate.release()
1485
time2 = datetime.datetime.now()
1486
if (time2 - time) >= delay:
1487
if not client.approved_by_default:
1488
logger.warning("Client %s timed out while"
1489
" waiting for approval",
1490
client.name)
1491
if self.server.use_dbus:
1492
# Emit D-Bus signal
1493
client.Rejected("Approval timed out")
1494
return
1495
else:
1496
break
1497
else:
1498
delay -= time2 - time
1499
1500
sent_size = 0
1501
while sent_size < len(client.secret):
1502
try:
1503
sent = session.send(client.secret[sent_size:])
1504
except gnutls.errors.GNUTLSError as error:
1505
logger.warning("gnutls send failed")
1506
return
1507
logger.debug("Sent: %d, remaining: %d",
1508
sent, len(client.secret)
1509
- (sent_size + sent))
1510
sent_size += sent
1511
1512
logger.info("Sending secret to %s", client.name)
1513
# bump the timeout using extended_timeout
1514
client.checked_ok(client.extended_timeout)
1515
if self.server.use_dbus:
1516
# Emit D-Bus signal
1517
client.GotSecret()
1518
1519
finally:
1520
if approval_required:
1521
client.approvals_pending -= 1
1522
try:
1523
session.bye()
1524
except gnutls.errors.GNUTLSError as error:
1525
logger.warning("GnuTLS bye failed")
1526
1527
@staticmethod
1528
def peer_certificate(session):
1529
"Return the peer's OpenPGP certificate as a bytestring"
1530
# If not an OpenPGP certificate...
1531
if (gnutls.library.functions
1532
.gnutls_certificate_type_get(session._c_object)
1533
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1534
# ...do the normal thing
1535
return session.peer_certificate
1536
list_size = ctypes.c_uint(1)
1537
cert_list = (gnutls.library.functions
1538
.gnutls_certificate_get_peers
1539
(session._c_object, ctypes.byref(list_size)))
1540
if not bool(cert_list) and list_size.value != 0:
1541
raise gnutls.errors.GNUTLSError("error getting peer"
1542
" certificate")
1543
if list_size.value == 0:
1544
return None
1545
cert = cert_list[0]
1546
return ctypes.string_at(cert.data, cert.size)
1547
1548
@staticmethod
1549
def fingerprint(openpgp):
1550
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1551
# New GnuTLS "datum" with the OpenPGP public key
1552
datum = (gnutls.library.types
1553
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1554
ctypes.POINTER
1555
(ctypes.c_ubyte)),
1556
ctypes.c_uint(len(openpgp))))
1557
# New empty GnuTLS certificate
1558
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1559
(gnutls.library.functions
1560
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1561
# Import the OpenPGP public key into the certificate
1562
(gnutls.library.functions
1563
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1564
gnutls.library.constants
1565
.GNUTLS_OPENPGP_FMT_RAW))
1566
# Verify the self signature in the key
1567
crtverify = ctypes.c_uint()
1568
(gnutls.library.functions
1569
.gnutls_openpgp_crt_verify_self(crt, 0,
1570
ctypes.byref(crtverify)))
1571
if crtverify.value != 0:
1572
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1573
raise (gnutls.errors.CertificateSecurityError
1574
("Verify failed"))
1575
# New buffer for the fingerprint
1576
buf = ctypes.create_string_buffer(20)
1577
buf_len = ctypes.c_size_t()
1578
# Get the fingerprint from the certificate into the buffer
1579
(gnutls.library.functions
1580
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1581
ctypes.byref(buf_len)))
1582
# Deinit the certificate
1583
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1584
# Convert the buffer to a Python bytestring
1585
fpr = ctypes.string_at(buf, buf_len.value)
1586
# Convert the bytestring to hexadecimal notation
1587
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1588
return hex_fpr
1589
1590
1591
class MultiprocessingMixIn(object):
1592
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1593
def sub_process_main(self, request, address):
1594
try:
1595
self.finish_request(request, address)
1596
except:
1597
self.handle_error(request, address)
1598
self.close_request(request)
1599
1600
def process_request(self, request, address):
1601
"""Start a new process to process the request."""
1602
proc = multiprocessing.Process(target = self.sub_process_main,
1603
args = (request,
1604
address))
1605
proc.start()
1606
return proc
1607
1608
1609
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1610
""" adds a pipe to the MixIn """
1611
def process_request(self, request, client_address):
1612
"""Overrides and wraps the original process_request().
1613
1614
This function creates a new pipe in self.pipe
1615
"""
1616
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1617
1618
proc = MultiprocessingMixIn.process_request(self, request,
1619
client_address)
1620
self.child_pipe.close()
1621
self.add_pipe(parent_pipe, proc)
1622
1623
def add_pipe(self, parent_pipe, proc):
1624
"""Dummy function; override as necessary"""
1625
raise NotImplementedError
1626
1627
1628
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1629
socketserver.TCPServer, object):
1630
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1631
658
logger.info(u"TCP connection from: %s",
659
unicode(self.client_address))
660
session = (gnutls.connection
661
.ClientSession(self.request,
662
gnutls.connection
663
.X509Credentials()))
664
665
line = self.request.makefile().readline()
666
logger.debug(u"Protocol version: %r", line)
667
try:
668
if int(line.strip().split()[0]) > 1:
669
raise RuntimeError
670
except (ValueError, IndexError, RuntimeError), error:
671
logger.error(u"Unknown protocol version: %s", error)
672
return
673
674
# Note: gnutls.connection.X509Credentials is really a generic
675
# GnuTLS certificate credentials object so long as no X.509
676
# keys are added to it. Therefore, we can use it here despite
677
# using OpenPGP certificates.
678
679
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
680
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
# "+DHE-DSS"))
682
# Use a fallback default, since this MUST be set.
683
priority = self.server.settings.get("priority", "NORMAL")
684
(gnutls.library.functions
685
.gnutls_priority_set_direct(session._c_object,
686
priority, None))
687
688
try:
689
session.handshake()
690
except gnutls.errors.GNUTLSError, error:
691
logger.warning(u"Handshake failed: %s", error)
692
# Do not run session.bye() here: the session is not
693
# established. Just abandon the request.
694
return
695
logger.debug(u"Handshake succeeded")
696
try:
697
fpr = fingerprint(peer_certificate(session))
698
except (TypeError, gnutls.errors.GNUTLSError), error:
699
logger.warning(u"Bad certificate: %s", error)
700
session.bye()
701
return
702
logger.debug(u"Fingerprint: %s", fpr)
703
704
for c in self.server.clients:
705
if c.fingerprint == fpr:
706
client = c
707
break
708
else:
709
logger.warning(u"Client not found for fingerprint: %s",
710
fpr)
711
session.bye()
712
return
713
# Have to check if client.still_valid(), since it is possible
714
# that the client timed out while establishing the GnuTLS
715
# session.
716
if not client.still_valid():
717
logger.warning(u"Client %(name)s is invalid",
718
vars(client))
719
session.bye()
720
return
721
## This won't work here, since we're in a fork.
722
# client.checked_ok()
723
sent_size = 0
724
while sent_size < len(client.secret):
725
sent = session.send(client.secret[sent_size:])
726
logger.debug(u"Sent: %d, remaining: %d",
727
sent, len(client.secret)
728
- (sent_size + sent))
729
sent_size += sent
730
session.bye()
731
732
733
class IPv6_TCPServer(SocketServer.ForkingMixIn,
734
SocketServer.TCPServer, object):
735
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1632
736
Attributes:
737
settings: Server settings
738
clients: Set() of Client objects
1633
739
enabled: Boolean; whether this server is activated yet
1634
interface: None or a network interface name (string)
1635
use_ipv6: Boolean; to use IPv6 or not
1636
740
"""
1637
def __init__(self, server_address, RequestHandlerClass,
1638
interface=None, use_ipv6=True):
1639
self.interface = interface
1640
if use_ipv6:
1641
self.address_family = socket.AF_INET6
1642
socketserver.TCPServer.__init__(self, server_address,
1643
RequestHandlerClass)
741
address_family = socket.AF_INET6
742
def __init__(self, *args, **kwargs):
743
if "settings" in kwargs:
744
self.settings = kwargs["settings"]
745
del kwargs["settings"]
746
if "clients" in kwargs:
747
self.clients = kwargs["clients"]
748
del kwargs["clients"]
749
self.enabled = False
750
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1644
751
def server_bind(self):
1645
752
"""This overrides the normal server_bind() function
1646
753
to bind to an interface if one was specified, and also NOT to
1647
754
bind to an address or port if they were not specified."""
1648
if self.interface is not None:
1649
if SO_BINDTODEVICE is None:
1650
logger.error("SO_BINDTODEVICE does not exist;"
1651
" cannot bind to interface %s",
1652
self.interface)
1653
else:
1654
try:
1655
self.socket.setsockopt(socket.SOL_SOCKET,
1656
SO_BINDTODEVICE,
1657
str(self.interface
1658
+ '\0'))
1659
except socket.error as error:
1660
if error[0] == errno.EPERM:
1661
logger.error("No permission to"
1662
" bind to interface %s",
1663
self.interface)
1664
elif error[0] == errno.ENOPROTOOPT:
1665
logger.error("SO_BINDTODEVICE not available;"
1666
" cannot bind to interface %s",
1667
self.interface)
1668
else:
1669
raise
755
if self.settings["interface"]:
756
# 25 is from /usr/include/asm-i486/socket.h
757
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
758
try:
759
self.socket.setsockopt(socket.SOL_SOCKET,
760
SO_BINDTODEVICE,
761
self.settings["interface"])
762
except socket.error, error:
763
if error[0] == errno.EPERM:
764
logger.error(u"No permission to"
765
u" bind to interface %s",
766
self.settings["interface"])
767
else:
768
raise
1670
769
# Only bind(2) the socket if we really need to.
1671
770
if self.server_address[0] or self.server_address[1]:
1672
771
if not self.server_address[0]:
1673
if self.address_family == socket.AF_INET6:
1674
any_address = "::" # in6addr_any
1675
else:
1676
any_address = socket.INADDR_ANY
1677
self.server_address = (any_address,
772
in6addr_any = "::"
773
self.server_address = (in6addr_any,
1678
774
self.server_address[1])
1679
775
elif not self.server_address[1]:
1680
776
self.server_address = (self.server_address[0],
1681
777
0)
1682
# if self.interface:
778
# if self.settings["interface"]:
1683
779
# self.server_address = (self.server_address[0],
1684
780
# 0, # port
1685
781
# 0, # flowinfo
1686
782
# if_nametoindex
1687
# (self.interface))
1688
return socketserver.TCPServer.server_bind(self)
1689
1690
1691
class MandosServer(IPv6_TCPServer):
1692
"""Mandos server.
1693
1694
Attributes:
1695
clients: set of Client objects
1696
gnutls_priority GnuTLS priority string
1697
use_dbus: Boolean; to emit D-Bus signals or not
1698
1699
Assumes a gobject.MainLoop event loop.
1700
"""
1701
def __init__(self, server_address, RequestHandlerClass,
1702
interface=None, use_ipv6=True, clients=None,
1703
gnutls_priority=None, use_dbus=True):
1704
self.enabled = False
1705
self.clients = clients
1706
if self.clients is None:
1707
self.clients = {}
1708
self.use_dbus = use_dbus
1709
self.gnutls_priority = gnutls_priority
1710
IPv6_TCPServer.__init__(self, server_address,
1711
RequestHandlerClass,
1712
interface = interface,
1713
use_ipv6 = use_ipv6)
783
# (self.settings
784
# ["interface"]))
785
return super(IPv6_TCPServer, self).server_bind()
1714
786
def server_activate(self):
1715
787
if self.enabled:
1716
return socketserver.TCPServer.server_activate(self)
1717
788
return super(IPv6_TCPServer, self).server_activate()
1718
789
def enable(self):
1719
790
self.enabled = True
1720
1721
def add_pipe(self, parent_pipe, proc):
1722
# Call "handle_ipc" for both data and EOF events
1723
gobject.io_add_watch(parent_pipe.fileno(),
1724
gobject.IO_IN | gobject.IO_HUP,
1725
functools.partial(self.handle_ipc,
1726
parent_pipe =
1727
parent_pipe,
1728
proc = proc))
1729
1730
def handle_ipc(self, source, condition, parent_pipe=None,
1731
proc = None, client_object=None):
1732
condition_names = {
1733
gobject.IO_IN: "IN", # There is data to read.
1734
gobject.IO_OUT: "OUT", # Data can be written (without
1735
# blocking).
1736
gobject.IO_PRI: "PRI", # There is urgent data to read.
1737
gobject.IO_ERR: "ERR", # Error condition.
1738
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1739
# broken, usually for pipes and
1740
# sockets).
1741
}
1742
conditions_string = ' | '.join(name
1743
for cond, name in
1744
condition_names.iteritems()
1745
if cond & condition)
1746
# error, or the other end of multiprocessing.Pipe has closed
1747
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1748
# Wait for other process to exit
1749
proc.join()
1750
return False
1751
1752
# Read a request from the child
1753
request = parent_pipe.recv()
1754
command = request[0]
1755
1756
if command == 'init':
1757
fpr = request[1]
1758
address = request[2]
1759
1760
for c in self.clients.itervalues():
1761
if c.fingerprint == fpr:
1762
client = c
1763
break
1764
else:
1765
logger.info("Client not found for fingerprint: %s, ad"
1766
"dress: %s", fpr, address)
1767
if self.use_dbus:
1768
# Emit D-Bus signal
1769
mandos_dbus_service.ClientNotFound(fpr,
1770
address[0])
1771
parent_pipe.send(False)
1772
return False
1773
1774
gobject.io_add_watch(parent_pipe.fileno(),
1775
gobject.IO_IN | gobject.IO_HUP,
1776
functools.partial(self.handle_ipc,
1777
parent_pipe =
1778
parent_pipe,
1779
proc = proc,
1780
client_object =
1781
client))
1782
parent_pipe.send(True)
1783
# remove the old hook in favor of the new above hook on
1784
# same fileno
1785
return False
1786
if command == 'funcall':
1787
funcname = request[1]
1788
args = request[2]
1789
kwargs = request[3]
1790
1791
parent_pipe.send(('data', getattr(client_object,
1792
funcname)(*args,
1793
**kwargs)))
1794
1795
if command == 'getattr':
1796
attrname = request[1]
1797
if callable(client_object.__getattribute__(attrname)):
1798
parent_pipe.send(('function',))
1799
else:
1800
parent_pipe.send(('data', client_object
1801
.__getattribute__(attrname)))
1802
1803
if command == 'setattr':
1804
attrname = request[1]
1805
value = request[2]
1806
setattr(client_object, attrname, value)
1807
1808
return True
1809
791
1810
792
1811
793
def string_to_delta(interval):
1819
801
datetime.timedelta(0, 3600)
1820
802
>>> string_to_delta('24h')
1821
803
datetime.timedelta(1)
1822
>>> string_to_delta('1w')
804
>>> string_to_delta(u'1w')
1823
805
datetime.timedelta(7)
1824
806
>>> string_to_delta('5m 30s')
1825
807
datetime.timedelta(0, 330)
1829
811
try:
1830
812
suffix = unicode(s[-1])
1831
813
value = int(s[:-1])
1832
if suffix == "d":
814
if suffix == u"d":
1833
815
delta = datetime.timedelta(value)
1834
elif suffix == "s":
816
elif suffix == u"s":
1835
817
delta = datetime.timedelta(0, value)
1836
elif suffix == "m":
818
elif suffix == u"m":
1837
819
delta = datetime.timedelta(0, 0, 0, 0, value)
1838
elif suffix == "h":
820
elif suffix == u"h":
1839
821
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1840
elif suffix == "w":
822
elif suffix == u"w":
1841
823
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1842
824
else:
1843
raise ValueError("Unknown suffix %r" % suffix)
1844
except (ValueError, IndexError) as e:
1845
raise ValueError(*(e.args))
825
raise ValueError
826
except (ValueError, IndexError):
827
raise ValueError
1846
828
timevalue += delta
1847
829
return timevalue
1848
830
1849
831
832
def server_state_changed(state):
833
"""Derived from the Avahi example code"""
834
if state == avahi.SERVER_COLLISION:
835
logger.error(u"Zeroconf server name collision")
836
service.remove()
837
elif state == avahi.SERVER_RUNNING:
838
service.add()
839
840
841
def entry_group_state_changed(state, error):
842
"""Derived from the Avahi example code"""
843
logger.debug(u"Avahi state change: %i", state)
844
845
if state == avahi.ENTRY_GROUP_ESTABLISHED:
846
logger.debug(u"Zeroconf service established.")
847
elif state == avahi.ENTRY_GROUP_COLLISION:
848
logger.warning(u"Zeroconf service name collision.")
849
service.rename()
850
elif state == avahi.ENTRY_GROUP_FAILURE:
851
logger.critical(u"Avahi: Error in group state changed %s",
852
unicode(error))
853
raise AvahiGroupError(u"State changed: %s" % unicode(error))
854
1850
855
def if_nametoindex(interface):
1851
"""Call the C function if_nametoindex(), or equivalent
1852
1853
Note: This function cannot accept a unicode string."""
856
"""Call the C function if_nametoindex(), or equivalent"""
1854
857
global if_nametoindex
1855
858
try:
1856
859
if_nametoindex = (ctypes.cdll.LoadLibrary
1857
860
(ctypes.util.find_library("c"))
1858
861
.if_nametoindex)
1859
862
except (OSError, AttributeError):
1860
logger.warning("Doing if_nametoindex the hard way")
863
if "struct" not in sys.modules:
864
import struct
865
if "fcntl" not in sys.modules:
866
import fcntl
1861
867
def if_nametoindex(interface):
1862
868
"Get an interface index the hard way, i.e. using fcntl()"
1863
869
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1864
with contextlib.closing(socket.socket()) as s:
870
with closing(socket.socket()) as s:
1865
871
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1866
struct.pack(str("16s16x"),
1867
interface))
1868
interface_index = struct.unpack(str("I"),
1869
ifreq[16:20])[0]
872
struct.pack("16s16x", interface))
873
interface_index = struct.unpack("I", ifreq[16:20])[0]
1870
874
return interface_index
1871
875
return if_nametoindex(interface)
1872
876
1873
877
1874
878
def daemon(nochdir = False, noclose = False):
1875
879
"""See daemon(3). Standard BSD Unix function.
1876
1877
880
This should really exist as os.daemon, but it doesn't (yet)."""
1878
881
if os.fork():
1879
882
sys.exit()
1887
890
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1888
891
if not stat.S_ISCHR(os.fstat(null).st_mode):
1889
892
raise OSError(errno.ENODEV,
1890
"%s not a character device"
1891
% os.path.devnull)
893
"/dev/null not a character device")
1892
894
os.dup2(null, sys.stdin.fileno())
1893
895
os.dup2(null, sys.stdout.fileno())
1894
896
os.dup2(null, sys.stderr.fileno())
1897
899
1898
900
1899
901
def main():
1900
1901
##################################################################
1902
# Parsing of options, both command line and config file
1903
1904
parser = argparse.ArgumentParser()
1905
parser.add_argument("-v", "--version", action="version",
1906
version = "%%(prog)s %s" % version,
1907
help="show version number and exit")
1908
parser.add_argument("-i", "--interface", metavar="IF",
1909
help="Bind to interface IF")
1910
parser.add_argument("-a", "--address",
1911
help="Address to listen for requests on")
1912
parser.add_argument("-p", "--port", type=int,
1913
help="Port number to receive requests on")
1914
parser.add_argument("--check", action="store_true",
1915
help="Run self-test")
1916
parser.add_argument("--debug", action="store_true",
1917
help="Debug mode; run in foreground and log"
1918
" to terminal")
1919
parser.add_argument("--debuglevel", metavar="LEVEL",
1920
help="Debug level for stdout output")
1921
parser.add_argument("--priority", help="GnuTLS"
1922
" priority string (see GnuTLS documentation)")
1923
parser.add_argument("--servicename",
1924
metavar="NAME", help="Zeroconf service name")
1925
parser.add_argument("--configdir",
1926
default="/etc/mandos", metavar="DIR",
1927
help="Directory to search for configuration"
1928
" files")
1929
parser.add_argument("--no-dbus", action="store_false",
1930
dest="use_dbus", help="Do not provide D-Bus"
1931
" system bus interface")
1932
parser.add_argument("--no-ipv6", action="store_false",
1933
dest="use_ipv6", help="Do not use IPv6")
1934
parser.add_argument("--no-restore", action="store_false",
1935
dest="restore",
1936
help="Do not restore stored state",
1937
default=True)
1938
1939
options = parser.parse_args()
902
parser = optparse.OptionParser(version = "%%prog %s" % version)
903
parser.add_option("-i", "--interface", type="string",
904
metavar="IF", help="Bind to interface IF")
905
parser.add_option("-a", "--address", type="string",
906
help="Address to listen for requests on")
907
parser.add_option("-p", "--port", type="int",
908
help="Port number to receive requests on")
909
parser.add_option("--check", action="store_true",
910
help="Run self-test")
911
parser.add_option("--debug", action="store_true",
912
help="Debug mode; run in foreground and log to"
913
" terminal")
914
parser.add_option("--priority", type="string", help="GnuTLS"
915
" priority string (see GnuTLS documentation)")
916
parser.add_option("--servicename", type="string", metavar="NAME",
917
help="Zeroconf service name")
918
parser.add_option("--configdir", type="string",
919
default="/etc/mandos", metavar="DIR",
920
help="Directory to search for configuration"
921
" files")
922
parser.add_option("--no-dbus", action="store_false",
923
dest="use_dbus",
924
help="Do not provide D-Bus system bus"
925
" interface")
926
options = parser.parse_args()[0]
1940
927
1941
928
if options.check:
1942
929
import doctest
1952
939
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1953
940
"servicename": "Mandos",
1954
941
"use_dbus": "True",
1955
"use_ipv6": "True",
1956
"debuglevel": "",
1957
942
}
1958
943
1959
944
# Parse config file for server-global settings
1960
server_config = configparser.SafeConfigParser(server_defaults)
945
server_config = ConfigParser.SafeConfigParser(server_defaults)
1961
946
del server_defaults
1962
server_config.read(os.path.join(options.configdir,
1963
"mandos.conf"))
947
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1964
948
# Convert the SafeConfigParser object to a dict
1965
949
server_settings = server_config.defaults()
1966
950
# Use the appropriate methods on the non-string config options
1967
for option in ("debug", "use_dbus", "use_ipv6"):
1968
server_settings[option] = server_config.getboolean("DEFAULT",
1969
option)
951
server_settings["debug"] = server_config.getboolean("DEFAULT",
952
"debug")
953
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
954
"use_dbus")
1970
955
if server_settings["port"]:
1971
956
server_settings["port"] = server_config.getint("DEFAULT",
1972
957
"port")
1976
961
# options, if set.
1977
962
for option in ("interface", "address", "port", "debug",
1978
963
"priority", "servicename", "configdir",
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
964
"use_dbus"):
1980
965
value = getattr(options, option)
1981
966
if value is not None:
1982
967
server_settings[option] = value
1983
968
del options
1984
# Force all strings to be unicode
1985
for option in server_settings.keys():
1986
if type(server_settings[option]) is str:
1987
server_settings[option] = unicode(server_settings[option])
1988
969
# Now we have our good server settings in "server_settings"
1989
970
1990
##################################################################
1991
1992
971
# For convenience
1993
972
debug = server_settings["debug"]
1994
debuglevel = server_settings["debuglevel"]
1995
973
use_dbus = server_settings["use_dbus"]
1996
use_ipv6 = server_settings["use_ipv6"]
974
975
if not debug:
976
syslogger.setLevel(logging.WARNING)
977
console.setLevel(logging.WARNING)
1997
978
1998
979
if server_settings["servicename"] != "Mandos":
1999
980
syslogger.setFormatter(logging.Formatter
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
981
('Mandos (%s): %%(levelname)s:'
982
' %%(message)s'
2002
983
% server_settings["servicename"]))
2003
984
2004
985
# Parse config file with clients
2005
client_defaults = { "timeout": "5m",
2006
"extended_timeout": "15m",
2007
"interval": "2m",
986
client_defaults = { "timeout": "1h",
987
"interval": "5m",
2008
988
"checker": "fping -q -- %%(host)s",
2009
989
"host": "",
2010
"approval_delay": "0s",
2011
"approval_duration": "1s",
2012
990
}
2013
client_config = configparser.SafeConfigParser(client_defaults)
991
client_config = ConfigParser.SafeConfigParser(client_defaults)
2014
992
client_config.read(os.path.join(server_settings["configdir"],
2015
993
"clients.conf"))
2016
994
2017
global mandos_dbus_service
2018
mandos_dbus_service = None
2019
2020
tcp_server = MandosServer((server_settings["address"],
2021
server_settings["port"]),
2022
ClientHandler,
2023
interface=(server_settings["interface"]
2024
or None),
2025
use_ipv6=use_ipv6,
2026
gnutls_priority=
2027
server_settings["priority"],
2028
use_dbus=use_dbus)
2029
if not debug:
2030
pidfilename = "/var/run/mandos.pid"
2031
try:
2032
pidfile = open(pidfilename, "w")
2033
except IOError:
2034
logger.error("Could not open file %r", pidfilename)
995
clients = Set()
996
tcp_server = IPv6_TCPServer((server_settings["address"],
997
server_settings["port"]),
998
TCP_handler,
999
settings=server_settings,
1000
clients=clients)
1001
pidfilename = "/var/run/mandos.pid"
1002
try:
1003
pidfile = open(pidfilename, "w")
1004
except IOError:
1005
logger.error("Could not open file %r", pidfilename)
2035
1006
2036
1007
try:
2037
1008
uid = pwd.getpwnam("_mandos").pw_uid
2043
1014
except KeyError:
2044
1015
try:
2045
1016
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
1017
gid = pwd.getpwnam("nogroup").pw_gid
2047
1018
except KeyError:
2048
1019
uid = 65534
2049
1020
gid = 65534
2050
1021
try:
2051
1022
os.setgid(gid)
2052
1023
os.setuid(uid)
2053
except OSError as error:
1024
except OSError, error:
2054
1025
if error[0] != errno.EPERM:
2055
1026
raise error
2056
1027
2057
if not debug and not debuglevel:
2058
logger.setLevel(logging.WARNING)
2059
if debuglevel:
2060
level = getattr(logging, debuglevel.upper())
2061
logger.setLevel(level)
2062
1028
# Enable all possible GnuTLS debugging
2063
1029
if debug:
2064
logger.setLevel(logging.DEBUG)
2065
# Enable all possible GnuTLS debugging
2066
2067
1030
# "Use a log level over 10 to enable all debugging options."
2068
1031
# - GnuTLS manual
2069
1032
gnutls.library.functions.gnutls_global_set_log_level(11)
2074
1037
2075
1038
(gnutls.library.functions
2076
1039
.gnutls_global_set_log_function(debug_gnutls))
2077
1040
1041
global service
1042
service = AvahiService(name = server_settings["servicename"],
1043
servicetype = "_mandos._tcp", )
1044
if server_settings["interface"]:
1045
service.interface = (if_nametoindex
1046
(server_settings["interface"]))
1047
1048
global main_loop
1049
global bus
1050
global server
1051
# From the Avahi example code
1052
DBusGMainLoop(set_as_default=True )
1053
main_loop = gobject.MainLoop()
1054
bus = dbus.SystemBus()
1055
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
avahi.DBUS_PATH_SERVER),
1057
avahi.DBUS_INTERFACE_SERVER)
1058
# End of Avahi example code
1059
if use_dbus:
1060
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1061
1062
clients.update(Set(Client(name = section,
1063
config
1064
= dict(client_config.items(section)),
1065
use_dbus = use_dbus)
1066
for section in client_config.sections()))
1067
if not clients:
1068
logger.warning(u"No clients defined")
1069
1070
if debug:
2078
1071
# Redirect stdin so all checkers get /dev/null
2079
1072
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2080
1073
os.dup2(null, sys.stdin.fileno())
2083
1076
else:
2084
1077
# No console logging
2085
1078
logger.removeHandler(console)
2086
2087
# Need to fork before connecting to D-Bus
2088
if not debug:
2089
1079
# Close all input and output, do double fork, etc.
2090
1080
daemon()
2091
1081
2092
global main_loop
2093
# From the Avahi example code
2094
DBusGMainLoop(set_as_default=True )
2095
main_loop = gobject.MainLoop()
2096
bus = dbus.SystemBus()
2097
# End of Avahi example code
2098
if use_dbus:
2099
try:
2100
bus_name = dbus.service.BusName("se.recompile.Mandos",
2101
bus, do_not_queue=True)
2102
old_bus_name = (dbus.service.BusName
2103
("se.bsnet.fukt.Mandos", bus,
2104
do_not_queue=True))
2105
except dbus.exceptions.NameExistsException as e:
2106
logger.error(unicode(e) + ", disabling D-Bus")
2107
use_dbus = False
2108
server_settings["use_dbus"] = False
2109
tcp_server.use_dbus = False
2110
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2111
service = AvahiServiceToSyslog(name =
2112
server_settings["servicename"],
2113
servicetype = "_mandos._tcp",
2114
protocol = protocol, bus = bus)
2115
if server_settings["interface"]:
2116
service.interface = (if_nametoindex
2117
(str(server_settings["interface"])))
2118
2119
global multiprocessing_manager
2120
multiprocessing_manager = multiprocessing.Manager()
2121
2122
client_class = Client
2123
if use_dbus:
2124
client_class = functools.partial(ClientDBusTransitional,
2125
bus = bus)
2126
2127
special_settings = {
2128
# Some settings need to be accessd by special methods;
2129
# booleans need .getboolean(), etc. Here is a list of them:
2130
"approved_by_default":
2131
lambda section:
2132
client_config.getboolean(section, "approved_by_default"),
2133
}
2134
# Construct a new dict of client settings of this form:
2135
# { client_name: {setting_name: value, ...}, ...}
2136
# with exceptions for any special settings as defined above
2137
client_settings = dict((clientname,
2138
dict((setting,
2139
(value if
2140
setting not in special_settings
2141
else special_settings[setting]
2142
(clientname)))
2143
for setting, value
2144
in client_config.items(clientname)))
2145
for clientname in client_config.sections())
2146
2147
old_client_settings = {}
2148
clients_data = []
2149
2150
# Get client data and settings from last running state.
2151
if server_settings["restore"]:
2152
try:
2153
with open(stored_state_path, "rb") as stored_state:
2154
clients_data, old_client_settings = (
2155
pickle.load(stored_state))
2156
os.remove(stored_state_path)
2157
except IOError as e:
2158
logger.warning("Could not load persistant state: {0}"
2159
.format(e))
2160
if e.errno != errno.ENOENT:
2161
raise
2162
2163
for client in clients_data:
2164
client_name = client["name"]
2165
2166
# Decide which value to use after restoring saved state.
2167
# We have three different values: Old config file,
2168
# new config file, and saved state.
2169
# New config value takes precedence if it differs from old
2170
# config value, otherwise use saved state.
2171
for name, value in client_settings[client_name].items():
2172
try:
2173
# For each value in new config, check if it differs
2174
# from the old config value (Except for the "secret"
2175
# attribute)
2176
if (name != "secret" and
2177
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
2183
# if its last checker was sucessful. Clients who checkers
2184
# failed before we stored it state is asumed to had failed
2185
# checker during downtime.
2186
if client["enabled"] and client["last_checked_ok"]:
2187
if ((datetime.datetime.utcnow()
2188
- client["last_checked_ok"]) > client["interval"]):
2189
if client["last_checker_status"] != 0:
2190
client["enabled"] = False
2191
else:
2192
client["expires"] = (datetime.datetime.utcnow()
2193
+ client["timeout"])
2194
2195
client["changedstate"] = (multiprocessing_manager
2196
.Condition(multiprocessing_manager
2197
.Lock()))
2198
if use_dbus:
2199
new_client = ClientDBusTransitional.__new__(
2200
ClientDBusTransitional)
2201
tcp_server.clients[client_name] = new_client
2202
new_client.bus = bus
2203
for name, value in client.iteritems():
2204
setattr(new_client, name, value)
2205
new_client._approvals_pending = 0
2206
new_client.add_to_dbus()
2207
else:
2208
tcp_server.clients[client_name] = Client.__new__(Client)
2209
for name, value in client.iteritems():
2210
setattr(tcp_server.clients[client_name], name, value)
2211
2212
tcp_server.clients[client_name].decrypt_secret(
2213
client_settings[client_name]["secret"])
2214
2215
# Create/remove clients based on new changes made to config
2216
for clientname in set(old_client_settings) - set(client_settings):
2217
del tcp_server.clients[clientname]
2218
for clientname in set(client_settings) - set(old_client_settings):
2219
tcp_server.clients[clientname] = client_class(name
2220
= clientname,
2221
config =
2222
client_settings
2223
[clientname])
2224
2225
if not tcp_server.clients:
2226
logger.warning("No clients defined")
2227
1082
try:
1083
pid = os.getpid()
1084
pidfile.write(str(pid) + "\n")
1085
pidfile.close()
1086
del pidfile
1087
except IOError:
1088
logger.error(u"Could not write to file %r with PID %d",
1089
pidfilename, pid)
1090
except NameError:
1091
# "pidfile" was never created
1092
pass
1093
del pidfilename
1094
1095
def cleanup():
1096
"Cleanup function; run on exit"
1097
global group
1098
# From the Avahi example code
1099
if not group is None:
1100
group.Free()
1101
group = None
1102
# End of Avahi example code
1103
1104
while clients:
1105
client = clients.pop()
1106
client.disable_hook = None
1107
client.disable()
1108
1109
atexit.register(cleanup)
1110
2228
1111
if not debug:
2229
try:
2230
with pidfile:
2231
pid = os.getpid()
2232
pidfile.write(str(pid) + "\n".encode("utf-8"))
2233
del pidfile
2234
except IOError:
2235
logger.error("Could not write to file %r with PID %d",
2236
pidfilename, pid)
2237
except NameError:
2238
# "pidfile" was never created
2239
pass
2240
del pidfilename
2241
2242
1112
signal.signal(signal.SIGINT, signal.SIG_IGN)
2243
2244
1113
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2245
1114
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2246
1115
2247
1116
if use_dbus:
2248
class MandosDBusService(dbus.service.Object):
1117
class MandosServer(dbus.service.Object):
2249
1118
"""A D-Bus proxy object"""
2250
1119
def __init__(self):
2251
1120
dbus.service.Object.__init__(self, bus, "/")
2252
_interface = "se.recompile.Mandos"
2253
2254
@dbus.service.signal(_interface, signature="o")
2255
def ClientAdded(self, objpath):
2256
"D-Bus signal"
2257
pass
2258
2259
@dbus.service.signal(_interface, signature="ss")
2260
def ClientNotFound(self, fingerprint, address):
1121
_interface = u"se.bsnet.fukt.Mandos"
1122
1123
@dbus.service.signal(_interface, signature="oa{sv}")
1124
def ClientAdded(self, objpath, properties):
2261
1125
"D-Bus signal"
2262
1126
pass
2263
1127
2269
1133
@dbus.service.method(_interface, out_signature="ao")
2270
1134
def GetAllClients(self):
2271
1135
"D-Bus method"
2272
return dbus.Array(c.dbus_object_path
2273
for c in
2274
tcp_server.clients.itervalues())
1136
return dbus.Array(c.dbus_object_path for c in clients)
2275
1137
2276
@dbus.service.method(_interface,
2277
out_signature="a{oa{sv}}")
1138
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2278
1139
def GetAllClientsWithProperties(self):
2279
1140
"D-Bus method"
2280
1141
return dbus.Dictionary(
2281
((c.dbus_object_path, c.GetAll(""))
2282
for c in tcp_server.clients.itervalues()),
1142
((c.dbus_object_path, c.GetAllProperties())
1143
for c in clients),
2283
1144
signature="oa{sv}")
2284
1145
2285
1146
@dbus.service.method(_interface, in_signature="o")
2286
1147
def RemoveClient(self, object_path):
2287
1148
"D-Bus method"
2288
for c in tcp_server.clients.itervalues():
1149
for c in clients:
2289
1150
if c.dbus_object_path == object_path:
2290
del tcp_server.clients[c.name]
2291
c.remove_from_connection()
1151
clients.remove(c)
2292
1152
# Don't signal anything except ClientRemoved
2293
c.disable(quiet=True)
1153
c.use_dbus = False
1154
c.disable()
2294
1155
# Emit D-Bus signal
2295
1156
self.ClientRemoved(object_path, c.name)
2296
1157
return
2297
raise KeyError(object_path)
1158
raise KeyError
2298
1159
2299
1160
del _interface
2300
1161
2301
class MandosDBusServiceTransitional(MandosDBusService):
2302
__metaclass__ = AlternateDBusNamesMetaclass
2303
mandos_dbus_service = MandosDBusServiceTransitional()
2304
2305
def cleanup():
2306
"Cleanup function; run on exit"
2307
service.cleanup()
2308
2309
multiprocessing.active_children()
2310
if not (tcp_server.clients or client_settings):
2311
return
2312
2313
# Store client before exiting. Secrets are encrypted with key
2314
# based on what config file has. If config file is
2315
# removed/edited, old secret will thus be unrecovable.
2316
clients = []
2317
for client in tcp_server.clients.itervalues():
2318
client.encrypt_secret(
2319
client_settings[client.name]["secret"])
2320
2321
client_dict = {}
2322
2323
# A list of attributes that will not be stored when
2324
# shutting down.
2325
exclude = set(("bus", "changedstate", "secret"))
2326
for name, typ in inspect.getmembers(dbus.service.Object):
2327
exclude.add(name)
2328
2329
client_dict["encrypted_secret"] = client.encrypted_secret
2330
for attr in client.client_structure:
2331
if attr not in exclude:
2332
client_dict[attr] = getattr(client, attr)
2333
2334
clients.append(client_dict)
2335
del client_settings[client.name]["secret"]
2336
2337
try:
2338
with os.fdopen(os.open(stored_state_path,
2339
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2340
stat.S_IRUSR | stat.S_IWUSR),
2341
"wb") as stored_state:
2342
pickle.dump((clients, client_settings), stored_state)
2343
except IOError as e:
2344
logger.warning("Could not save persistant state: {0}"
2345
.format(e))
2346
if e.errno != errno.ENOENT:
2347
raise
2348
2349
# Delete all clients, and settings from config
2350
while tcp_server.clients:
2351
name, client = tcp_server.clients.popitem()
2352
if use_dbus:
2353
client.remove_from_connection()
2354
# Don't signal anything except ClientRemoved
2355
client.disable(quiet=True)
2356
if use_dbus:
2357
# Emit D-Bus signal
2358
mandos_dbus_service.ClientRemoved(client
2359
.dbus_object_path,
2360
client.name)
2361
client_settings.clear()
2362
2363
atexit.register(cleanup)
2364
2365
for client in tcp_server.clients.itervalues():
1162
mandos_server = MandosServer()
1163
1164
for client in clients:
2366
1165
if use_dbus:
2367
1166
# Emit D-Bus signal
2368
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2369
# Need to initiate checking of clients
2370
if client.enabled:
2371
client.init_checker()
2372
1167
mandos_server.ClientAdded(client.dbus_object_path,
1168
client.GetAllProperties())
1169
client.enable()
2373
1170
2374
1171
tcp_server.enable()
2375
1172
tcp_server.server_activate()
2376
1173
2377
1174
# Find out what port we got
2378
1175
service.port = tcp_server.socket.getsockname()[1]
2379
if use_ipv6:
2380
logger.info("Now listening on address %r, port %d,"
2381
" flowinfo %d, scope_id %d"
2382
% tcp_server.socket.getsockname())
2383
else: # IPv4
2384
logger.info("Now listening on address %r, port %d"
2385
% tcp_server.socket.getsockname())
1176
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1177
u" scope_id %d" % tcp_server.socket.getsockname())
2386
1178
2387
1179
#service.interface = tcp_server.socket.getsockname()[3]
2388
1180
2389
1181
try:
2390
1182
# From the Avahi example code
1183
server.connect_to_signal("StateChanged", server_state_changed)
2391
1184
try:
2392
service.activate()
2393
except dbus.exceptions.DBusException as error:
2394
logger.critical("DBusException: %s", error)
2395
cleanup()
1185
server_state_changed(server.GetState())
1186
except dbus.exceptions.DBusException, error:
1187
logger.critical(u"DBusException: %s", error)
2396
1188
sys.exit(1)
2397
1189
# End of Avahi example code
2398
1190
2401
1193
(tcp_server.handle_request
2402
1194
(*args[2:], **kwargs) or True))
2403
1195
2404
logger.debug("Starting main loop")
1196
logger.debug(u"Starting main loop")
2405
1197
main_loop.run()
2406
except AvahiError as error:
2407
logger.critical("AvahiError: %s", error)
2408
cleanup()
1198
except AvahiError, error:
1199
logger.critical(u"AvahiError: %s", error)
2409
1200
sys.exit(1)
2410
1201
except KeyboardInterrupt:
2411
1202
if debug:
2412
print("", file=sys.stderr)
1203
print >> sys.stderr
2413
1204
logger.debug("Server received KeyboardInterrupt")
2414
1205
logger.debug("Server exiting")
2415
# Must run before the D-Bus bus name gets deregistered
2416
cleanup()
2417
2418
1206
2419
1207
if __name__ == '__main__':
2420
1208
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0