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- Committer: Teddy Hogeborn
- Date: 2008-09-12 19:12:40 UTC
- Revision ID: teddy@fukt.bsnet.se-20080912191240-edjlcll43eoijkx0
* Makefile (install): Use "install-client-nokey".
(install-server): Create "/etc/default" and "/usr/sbin", too.
(install-client): Do not depend on "$(INITRAMFSTOOLS)/hooks/.".
Renamed to "install-client-nokey". Split out
post-installation-stuff to new "install-client"
target.
* mandos-clients.conf.xml: White space adjustments.
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/mandos-client.xml: - '' -
* overview.xml: Improved grammar.
(install-server): Create "/etc/default" and "/usr/sbin", too.
(install-client): Do not depend on "$(INITRAMFSTOOLS)/hooks/.".
Renamed to "install-client-nokey". Split out
post-installation-stuff to new "install-client"
target.
* mandos-clients.conf.xml: White space adjustments.
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/mandos-client.xml: - '' -
* overview.xml: Improved grammar.
- files added:
- debian
- files removed:
- .bzr-builddeb
- debian
- debian/po
- 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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
28
27
# along with this program. If not, see
29
28
# <http://www.gnu.org/licenses/>.
30
29
#
31
# Contact the authors at <mandos@recompile.se>.
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
33
from __future__ import division
36
34
37
import SocketServer as socketserver
35
import SocketServer
38
36
import socket
39
import argparse
37
import select
38
from optparse import OptionParser
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
67
59
68
60
import dbus
69
import dbus.service
70
61
import gobject
71
62
import avahi
72
63
from dbus.mainloop.glib import DBusGMainLoop
73
64
import ctypes
74
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
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
96
syslogger.setFormatter(logging.Formatter
97
('Mandos [%(process)d]: %(levelname)s:'
98
' %(message)s'))
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
99
74
logger.addHandler(syslogger)
100
75
101
76
console = logging.StreamHandler()
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
103
' [%(process)d]:'
104
' %(levelname)s:'
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
105
78
' %(message)s'))
106
79
logger.addHandler(console)
107
80
108
109
81
class AvahiError(Exception):
110
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
111
83
self.value = value
112
super(AvahiError, self).__init__(value, *args, **kwargs)
113
def __unicode__(self):
114
return unicode(repr(self.value))
84
def __str__(self):
85
return repr(self.value)
115
86
116
87
class AvahiServiceError(AvahiError):
117
88
pass
122
93
123
94
class AvahiService(object):
124
95
"""An Avahi (Zeroconf) service.
125
126
96
Attributes:
127
97
interface: integer; avahi.IF_UNSPEC or an interface index.
128
98
Used to optionally bind to the specified interface.
136
106
max_renames: integer; maximum number of renames
137
107
rename_count: integer; counter so we only rename after collisions
138
108
a sensible number of times
139
group: D-Bus Entry Group
140
server: D-Bus Server
141
bus: dbus.SystemBus()
142
109
"""
143
110
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
144
servicetype = None, port = None, TXT = None,
145
domain = "", host = "", max_renames = 32768,
146
protocol = avahi.PROTO_UNSPEC, bus = None):
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
147
113
self.interface = interface
148
114
self.name = name
149
self.type = servicetype
115
self.type = type
150
116
self.port = port
151
self.TXT = TXT if TXT is not None else []
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
152
121
self.domain = domain
153
122
self.host = host
154
123
self.rename_count = 0
155
124
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
125
def rename(self):
162
126
"""Derived from the Avahi example code"""
163
127
if self.rename_count >= self.max_renames:
164
logger.critical("No suitable Zeroconf service name found"
165
" after %i retries, exiting.",
166
self.rename_count)
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
130
rename_count)
167
131
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)
132
self.name = server.GetAlternativeServiceName(self.name)
133
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
172
138
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)
139
self.add()
179
140
self.rename_count += 1
180
141
def remove(self):
181
142
"""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()
143
if group is not None:
144
group.Reset()
187
145
def add(self):
188
146
"""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
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
170
171
285
172
class Client(object):
286
173
"""A representation of a client host served by this server.
287
288
174
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
292
checker: subprocess.Popen(); a running checker process used
293
to see if the client lives.
294
'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
175
name: string; from the config file, used in log messages
176
fingerprint: string (40 or 32 hexadecimal digits); used to
177
uniquely identify the client
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
189
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
191
checker_callback_tag: - '' -
192
checker_command: string; External command which is run to check if
193
client lives. %() expansions are done at
298
194
runtime with vars(self) as dict, so that for
299
195
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
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
326
201
"""
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
def timeout_milliseconds(self):
334
"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)
340
341
def interval_milliseconds(self):
342
"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):
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
349
226
"""Note: the 'checker' key in 'config' sets the
350
227
'checker_command' attribute and *not* the 'checker'
351
228
attribute."""
352
229
self.name = name
353
if config is None:
354
config = {}
355
logger.debug("Creating client %r", self.name)
230
logger.debug(u"Creating client %r", self.name)
356
231
# Uppercase and remove spaces from fingerprint for later
357
232
# comparison purposes with return value from the fingerprint()
358
233
# function
359
self.fingerprint = (config["fingerprint"].upper()
360
.replace(" ", ""))
361
logger.debug(" Fingerprint: %s", self.fingerprint)
234
self.fingerprint = config["fingerprint"].upper()\
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:
368
self.secret = secfile.read()
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
369
243
else:
370
raise TypeError("No secret or secfile for client %s"
244
raise TypeError(u"No secret or secfile for client %s"
371
245
% self.name)
372
246
self.host = config.get("host", "")
373
self.created = datetime.datetime.utcnow()
374
self.enabled = True
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
247
self.created = datetime.datetime.now()
377
248
self.last_checked_ok = None
378
self.last_checker_status = None
379
249
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
382
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
383
252
self.checker = None
384
253
self.checker_initiator_tag = None
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
254
self.stop_initiator_tag = None
387
255
self.checker_callback_tag = None
388
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()
418
419
def enable(self):
256
self.check_command = config["checker"]
257
def start(self):
420
258
"""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
426
self.enabled = True
427
self.last_enabled = datetime.datetime.utcnow()
428
self.init_checker()
429
430
def disable(self, quiet=True):
431
"""Disable this client."""
432
if not getattr(self, "enabled", False):
259
# Schedule a new checker to be started an 'interval' from now,
260
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
264
# Also start a new checker *right now*.
265
self.start_checker()
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
433
279
return False
434
if not quiet:
435
self.send_changedstate()
436
if not quiet:
437
logger.info("Disabling client %s", self.name)
438
if getattr(self, "disable_initiator_tag", False):
439
gobject.source_remove(self.disable_initiator_tag)
440
self.disable_initiator_tag = None
441
self.expires = None
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
442
283
if getattr(self, "checker_initiator_tag", False):
443
284
gobject.source_remove(self.checker_initiator_tag)
444
285
self.checker_initiator_tag = None
445
286
self.stop_checker()
446
self.enabled = False
287
if self.stop_hook:
288
self.stop_hook(self)
447
289
# Do not run this again if called by a gobject.timeout_add
448
290
return False
449
450
291
def __del__(self):
451
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
467
def checker_callback(self, pid, condition, command):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
468
295
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
469
297
self.checker_callback_tag = None
470
298
self.checker = None
471
if os.WIFEXITED(condition):
472
self.last_checker_status = os.WEXITSTATUS(condition)
473
if self.last_checker_status == 0:
474
logger.info("Checker for %(name)s succeeded",
475
vars(self))
476
self.checked_ok()
477
else:
478
logger.info("Checker for %(name)s failed",
479
vars(self))
480
else:
481
self.last_checker_status = -1
482
logger.warning("Checker for %(name)s crashed?",
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
309
logger.warning(u"Checker for %(name)s crashed?",
483
310
vars(self))
484
485
def checked_ok(self, timeout=None):
486
"""Bump up the timeout for this client.
487
488
This should only be called when the client has been seen,
489
alive and well.
490
"""
491
if timeout is None:
492
timeout = self.timeout
493
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()
504
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
505
314
def start_checker(self):
506
315
"""Start a new checker subprocess if one is not running.
507
508
316
If a checker already exists, leave it running and do
509
317
nothing."""
510
318
# The reason for not killing a running checker is that if we
513
321
# client would inevitably timeout, since no checker would get
514
322
# a chance to run to completion. If we instead leave running
515
323
# 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
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
533
326
if self.checker is None:
534
327
try:
535
# In case checker_command has exactly one % operator
536
command = self.checker_command % self.host
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
537
330
except TypeError:
538
331
# 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
332
escaped_attrs = dict((key, re.escape(str(val)))
333
for key, val in
334
vars(self).iteritems())
547
335
try:
548
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)
336
command = self.check_command % escaped_attrs
337
except TypeError, error:
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
552
340
return True # Try again later
553
self.current_checker_command = command
554
341
try:
555
logger.info("Starting checker %r for %s",
342
logger.info(u"Starting checker %r for %s",
556
343
command, self.name)
557
344
# We don't need to redirect stdout and stderr, since
558
345
# in normal mode, that is already done by daemon(),
561
348
self.checker = subprocess.Popen(command,
562
349
close_fds=True,
563
350
shell=True, cwd="/")
564
self.checker_callback_tag = (gobject.child_watch_add
565
(self.checker.pid,
566
self.checker_callback,
567
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",
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
354
except OSError, error:
355
logger.error(u"Failed to start subprocess: %s",
576
356
error)
577
357
# Re-run this periodically if run by gobject.timeout_add
578
358
return True
579
580
359
def stop_checker(self):
581
360
"""Force the checker process, if any, to stop."""
582
361
if self.checker_callback_tag:
584
363
self.checker_callback_tag = None
585
364
if getattr(self, "checker", None) is None:
586
365
return
587
logger.debug("Stopping checker for %(name)s", vars(self))
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
588
367
try:
589
368
os.kill(self.checker.pid, signal.SIGTERM)
590
#time.sleep(0.5)
369
#os.sleep(0.5)
591
370
#if self.checker.poll() is None:
592
371
# os.kill(self.checker.pid, signal.SIGKILL)
593
except OSError as error:
372
except OSError, error:
594
373
if error.errno != errno.ESRCH: # No such process
595
374
raise
596
375
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.UInt64,
1016
"ApprovalDelay",
1017
type_func =
1018
_timedelta_to_milliseconds)
1019
approval_duration = notifychangeproperty(
1020
dbus.UInt64, "ApprovalDuration",
1021
type_func = _timedelta_to_milliseconds)
1022
host = notifychangeproperty(dbus.String, "Host")
1023
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1024
type_func =
1025
_timedelta_to_milliseconds)
1026
extended_timeout = notifychangeproperty(
1027
dbus.UInt64, "ExtendedTimeout",
1028
type_func = _timedelta_to_milliseconds)
1029
interval = notifychangeproperty(dbus.UInt64,
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
1095
1096
# CheckerCompleted - signal
1097
@dbus.service.signal(_interface, signature="nxs")
1098
def CheckerCompleted(self, exitcode, waitstatus, command):
1099
"D-Bus signal"
1100
pass
1101
1102
# CheckerStarted - signal
1103
@dbus.service.signal(_interface, signature="s")
1104
def CheckerStarted(self, command):
1105
"D-Bus signal"
1106
pass
1107
1108
# PropertyChanged - signal
1109
@dbus.service.signal(_interface, signature="sv")
1110
def PropertyChanged(self, property, value):
1111
"D-Bus signal"
1112
pass
1113
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()
1146
1147
# Enable - method
1148
@dbus.service.method(_interface)
1149
def Enable(self):
1150
"D-Bus method"
1151
self.enable()
1152
1153
# StartChecker - method
1154
@dbus.service.method(_interface)
1155
def StartChecker(self):
1156
"D-Bus method"
1157
self.start_checker()
1158
1159
# Disable - method
1160
@dbus.service.method(_interface)
1161
def Disable(self):
1162
"D-Bus method"
1163
self.disable()
1164
1165
# 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)
1340
1341
del _interface
1342
1343
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.
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
380
return now < (self.created + self.timeout)
381
else:
382
return now < (self.last_checked_ok + self.timeout)
383
384
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
1376
442
Note: This will run in its own forked process."""
1377
443
1378
444
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
445
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1632
518
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
1633
521
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
522
"""
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)
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
1644
533
def server_bind(self):
1645
534
"""This overrides the normal server_bind() function
1646
535
to bind to an interface if one was specified, and also NOT to
1647
536
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
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
1670
551
# Only bind(2) the socket if we really need to.
1671
552
if self.server_address[0] or self.server_address[1]:
1672
553
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,
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1678
556
self.server_address[1])
1679
557
elif not self.server_address[1]:
1680
558
self.server_address = (self.server_address[0],
1681
559
0)
1682
# if self.interface:
560
# if self.settings["interface"]:
1683
561
# self.server_address = (self.server_address[0],
1684
562
# 0, # port
1685
563
# 0, # flowinfo
1686
564
# 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)
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1714
568
def server_activate(self):
1715
569
if self.enabled:
1716
return socketserver.TCPServer.server_activate(self)
1717
570
return super(type(self), self).server_activate()
1718
571
def enable(self):
1719
572
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
573
1810
574
1811
575
def string_to_delta(interval):
1812
576
"""Parse a string and return a datetime.timedelta
1813
577
1814
578
>>> string_to_delta('7d')
1815
579
datetime.timedelta(7)
1816
580
>>> string_to_delta('60s')
1819
583
datetime.timedelta(0, 3600)
1820
584
>>> string_to_delta('24h')
1821
585
datetime.timedelta(1)
1822
>>> string_to_delta('1w')
586
>>> string_to_delta(u'1w')
1823
587
datetime.timedelta(7)
1824
588
>>> string_to_delta('5m 30s')
1825
589
datetime.timedelta(0, 330)
1827
591
timevalue = datetime.timedelta(0)
1828
592
for s in interval.split():
1829
593
try:
1830
suffix = unicode(s[-1])
1831
value = int(s[:-1])
1832
if suffix == "d":
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
1833
597
delta = datetime.timedelta(value)
1834
elif suffix == "s":
598
elif suffix == u"s":
1835
599
delta = datetime.timedelta(0, value)
1836
elif suffix == "m":
600
elif suffix == u"m":
1837
601
delta = datetime.timedelta(0, 0, 0, 0, value)
1838
elif suffix == "h":
602
elif suffix == u"h":
1839
603
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1840
elif suffix == "w":
604
elif suffix == u"w":
1841
605
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1842
606
else:
1843
raise ValueError("Unknown suffix %r" % suffix)
1844
except (ValueError, IndexError) as e:
1845
raise ValueError(*(e.args))
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
1846
610
timevalue += delta
1847
611
return timevalue
1848
612
1849
613
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
1850
637
def if_nametoindex(interface):
1851
"""Call the C function if_nametoindex(), or equivalent
1852
1853
Note: This function cannot accept a unicode string."""
638
"""Call the C function if_nametoindex(), or equivalent"""
1854
639
global if_nametoindex
1855
640
try:
1856
if_nametoindex = (ctypes.cdll.LoadLibrary
1857
(ctypes.util.find_library("c"))
1858
.if_nametoindex)
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
1859
645
except (OSError, AttributeError):
1860
logger.warning("Doing if_nametoindex the hard way")
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
1861
650
def if_nametoindex(interface):
1862
651
"Get an interface index the hard way, i.e. using fcntl()"
1863
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1864
with contextlib.closing(socket.socket()) as s:
1865
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1866
struct.pack(str("16s16x"),
1867
interface))
1868
interface_index = struct.unpack(str("I"),
1869
ifreq[16:20])[0]
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
1870
658
return interface_index
1871
659
return if_nametoindex(interface)
1872
660
1873
661
1874
662
def daemon(nochdir = False, noclose = False):
1875
663
"""See daemon(3). Standard BSD Unix function.
1876
1877
664
This should really exist as os.daemon, but it doesn't (yet)."""
1878
665
if os.fork():
1879
666
sys.exit()
1887
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1888
675
if not stat.S_ISCHR(os.fstat(null).st_mode):
1889
676
raise OSError(errno.ENODEV,
1890
"%s not a character device"
1891
% os.path.devnull)
677
"/dev/null not a character device")
1892
678
os.dup2(null, sys.stdin.fileno())
1893
679
os.dup2(null, sys.stdout.fileno())
1894
680
os.dup2(null, sys.stderr.fileno())
1897
683
1898
684
1899
685
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()
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
1940
710
1941
711
if options.check:
1942
712
import doctest
1951
721
"priority":
1952
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1953
723
"servicename": "Mandos",
1954
"use_dbus": "True",
1955
"use_ipv6": "True",
1956
"debuglevel": "",
1957
724
}
1958
725
1959
726
# Parse config file for server-global settings
1960
server_config = configparser.SafeConfigParser(server_defaults)
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1961
728
del server_defaults
1962
server_config.read(os.path.join(options.configdir,
1963
"mandos.conf"))
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1964
730
# Convert the SafeConfigParser object to a dict
1965
731
server_settings = server_config.defaults()
1966
# 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)
1970
if server_settings["port"]:
1971
server_settings["port"] = server_config.getint("DEFAULT",
1972
"port")
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1973
735
del server_config
1974
736
1975
737
# Override the settings from the config file with command line
1976
738
# options, if set.
1977
739
for option in ("interface", "address", "port", "debug",
1978
"priority", "servicename", "configdir",
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
740
"priority", "servicename", "configdir"):
1980
741
value = getattr(options, option)
1981
742
if value is not None:
1982
743
server_settings[option] = value
1983
744
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
745
# Now we have our good server settings in "server_settings"
1989
746
1990
##################################################################
1991
1992
# For convenience
1993
747
debug = server_settings["debug"]
1994
debuglevel = server_settings["debuglevel"]
1995
use_dbus = server_settings["use_dbus"]
1996
use_ipv6 = server_settings["use_ipv6"]
748
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
1997
752
1998
753
if server_settings["servicename"] != "Mandos":
1999
syslogger.setFormatter(logging.Formatter
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
2002
757
% server_settings["servicename"]))
2003
758
2004
759
# Parse config file with clients
2005
client_defaults = { "timeout": "5m",
2006
"extended_timeout": "15m",
2007
"interval": "2m",
2008
"checker": "fping -q -- %%(host)s",
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
2009
763
"host": "",
2010
"approval_delay": "0s",
2011
"approval_duration": "1s",
2012
764
}
2013
client_config = configparser.SafeConfigParser(client_defaults)
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
2014
766
client_config.read(os.path.join(server_settings["configdir"],
2015
767
"clients.conf"))
2016
768
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)
2035
2036
try:
2037
uid = pwd.getpwnam("_mandos").pw_uid
2038
gid = pwd.getpwnam("_mandos").pw_gid
2039
except KeyError:
2040
try:
2041
uid = pwd.getpwnam("mandos").pw_uid
2042
gid = pwd.getpwnam("mandos").pw_gid
2043
except KeyError:
2044
try:
2045
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
2047
except KeyError:
2048
uid = 65534
2049
gid = 65534
2050
try:
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
798
os.setuid(uid)
2051
799
os.setgid(gid)
2052
os.setuid(uid)
2053
except OSError as error:
800
except OSError, error:
2054
801
if error[0] != errno.EPERM:
2055
802
raise error
2056
803
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)
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
810
811
global main_loop
812
global bus
813
global server
814
# From the Avahi example code
815
DBusGMainLoop(set_as_default=True )
816
main_loop = gobject.MainLoop()
817
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
# End of Avahi example code
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
2062
837
2063
838
if debug:
2064
logger.setLevel(logging.DEBUG)
2065
# Enable all possible GnuTLS debugging
2066
2067
# "Use a log level over 10 to enable all debugging options."
2068
# - GnuTLS manual
2069
gnutls.library.functions.gnutls_global_set_log_level(11)
2070
2071
@gnutls.library.types.gnutls_log_func
2072
def debug_gnutls(level, string):
2073
logger.debug("GnuTLS: %s", string[:-1])
2074
2075
(gnutls.library.functions
2076
.gnutls_global_set_log_function(debug_gnutls))
2077
2078
839
# Redirect stdin so all checkers get /dev/null
2079
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2080
841
os.dup2(null, sys.stdin.fileno())
2083
844
else:
2084
845
# No console logging
2085
846
logger.removeHandler(console)
2086
2087
# Need to fork before connecting to D-Bus
2088
if not debug:
2089
847
# Close all input and output, do double fork, etc.
2090
848
daemon()
2091
849
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
850
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
854
del pidfile
855
except IOError, err:
856
logger.error(u"Could not write to file %r with PID %d",
857
pidfilename, pid)
858
except NameError:
859
# "pidfile" was never created
860
pass
861
del pidfilename
862
863
def cleanup():
864
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
871
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
876
877
atexit.register(cleanup)
878
2228
879
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
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
2243
2244
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2245
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2246
883
2247
if use_dbus:
2248
class MandosDBusService(dbus.service.Object):
2249
"""A D-Bus proxy object"""
2250
def __init__(self):
2251
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):
2261
"D-Bus signal"
2262
pass
2263
2264
@dbus.service.signal(_interface, signature="os")
2265
def ClientRemoved(self, objpath, name):
2266
"D-Bus signal"
2267
pass
2268
2269
@dbus.service.method(_interface, out_signature="ao")
2270
def GetAllClients(self):
2271
"D-Bus method"
2272
return dbus.Array(c.dbus_object_path
2273
for c in
2274
tcp_server.clients.itervalues())
2275
2276
@dbus.service.method(_interface,
2277
out_signature="a{oa{sv}}")
2278
def GetAllClientsWithProperties(self):
2279
"D-Bus method"
2280
return dbus.Dictionary(
2281
((c.dbus_object_path, c.GetAll(""))
2282
for c in tcp_server.clients.itervalues()),
2283
signature="oa{sv}")
2284
2285
@dbus.service.method(_interface, in_signature="o")
2286
def RemoveClient(self, object_path):
2287
"D-Bus method"
2288
for c in tcp_server.clients.itervalues():
2289
if c.dbus_object_path == object_path:
2290
del tcp_server.clients[c.name]
2291
c.remove_from_connection()
2292
# Don't signal anything except ClientRemoved
2293
c.disable(quiet=True)
2294
# Emit D-Bus signal
2295
self.ClientRemoved(object_path, c.name)
2296
return
2297
raise KeyError(object_path)
2298
2299
del _interface
2300
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():
2366
if use_dbus:
2367
# 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
884
for client in clients:
885
client.start()
2373
886
2374
887
tcp_server.enable()
2375
888
tcp_server.server_activate()
2376
889
2377
890
# Find out what port we got
2378
891
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())
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
2386
894
2387
895
#service.interface = tcp_server.socket.getsockname()[3]
2388
896
2389
897
try:
2390
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
2391
900
try:
2392
service.activate()
2393
except dbus.exceptions.DBusException as error:
2394
logger.critical("DBusException: %s", error)
2395
cleanup()
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
2396
904
sys.exit(1)
2397
905
# End of Avahi example code
2398
906
2399
907
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2400
908
lambda *args, **kwargs:
2401
(tcp_server.handle_request
2402
(*args[2:], **kwargs) or True))
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2403
911
2404
logger.debug("Starting main loop")
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
2405
914
main_loop.run()
2406
except AvahiError as error:
2407
logger.critical("AvahiError: %s", error)
2408
cleanup()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2409
917
sys.exit(1)
2410
918
except KeyboardInterrupt:
2411
919
if debug:
2412
print("", file=sys.stderr)
2413
logger.debug("Server received KeyboardInterrupt")
2414
logger.debug("Server exiting")
2415
# Must run before the D-Bus bus name gets deregistered
2416
cleanup()
2417
920
print
2418
921
2419
922
if __name__ == '__main__':
2420
923
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0