To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 199
- compare with another revision
- download diff
- download tarball
- view history from revision 199
- Committer: Teddy Hogeborn
- Date: 2008-09-21 04:22:50 UTC
- Revision ID: teddy@fukt.bsnet.se-20080921042250-r0qqjsbz2ulfo5le
* Makefile: Bug fix: fix syntax error.
* debian/control: Depend on "po-debconf".
(mandos, mandos-client): Add "${misc:Depends}", used by
dh_installdebconf.
* debian/mandos-client.config: New; show note.
* debian/mandos-client.template: New.
* debian/mandos.README.Debian: New.
* debian/mandos.config: New; show note.
* debian/mandos.prerm: New; stop daemon.
* debian/mandos.template: New.
* debian/po/POTFILES.in: New.
* debian/po/sv.po: New.
* debian/rules (clean): Added "debconf-updatepo" as suggested by
po-debconf(7).
(binary-common): Added "dh_installdebconf" to use "debian/*.config"
and "debian/*.template" files.
* debian/control: Depend on "po-debconf".
(mandos, mandos-client): Add "${misc:Depends}", used by
dh_installdebconf.
* debian/mandos-client.config: New; show note.
* debian/mandos-client.template: New.
* debian/mandos.README.Debian: New.
* debian/mandos.config: New; show note.
* debian/mandos.prerm: New; stop daemon.
* debian/mandos.template: New.
* debian/po/POTFILES.in: New.
* debian/po/sv.po: New.
* debian/rules (clean): Added "debconf-updatepo" as suggested by
po-debconf(7).
(binary-common): Added "dh_installdebconf" to use "debian/*.config"
and "debian/*.template" files.
- files added:
- debian/mandos-client.config
- files removed:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 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
stored_state_path = "/var/lib/mandos/clients.pickle"
90
91
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
def initlogger(level=logging.WARNING):
97
"""init logger and add loglevel"""
98
99
syslogger.setFormatter(logging.Formatter
100
('Mandos [%(process)d]: %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(syslogger)
103
104
console = logging.StreamHandler()
105
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
106
' [%(process)d]:'
107
' %(levelname)s:'
108
' %(message)s'))
109
logger.addHandler(console)
110
logger.setLevel(level)
111
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'))
74
logger.addHandler(syslogger)
75
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
79
logger.addHandler(console)
112
80
113
81
class AvahiError(Exception):
114
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
115
83
self.value = value
116
super(AvahiError, self).__init__(value, *args, **kwargs)
117
def __unicode__(self):
118
return unicode(repr(self.value))
84
def __str__(self):
85
return repr(self.value)
119
86
120
87
class AvahiServiceError(AvahiError):
121
88
pass
126
93
127
94
class AvahiService(object):
128
95
"""An Avahi (Zeroconf) service.
129
130
96
Attributes:
131
97
interface: integer; avahi.IF_UNSPEC or an interface index.
132
98
Used to optionally bind to the specified interface.
140
106
max_renames: integer; maximum number of renames
141
107
rename_count: integer; counter so we only rename after collisions
142
108
a sensible number of times
143
group: D-Bus Entry Group
144
server: D-Bus Server
145
bus: dbus.SystemBus()
146
109
"""
147
110
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
148
servicetype = None, port = None, TXT = None,
149
domain = "", host = "", max_renames = 32768,
150
protocol = avahi.PROTO_UNSPEC, bus = None):
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
151
113
self.interface = interface
152
114
self.name = name
153
self.type = servicetype
115
self.type = type
154
116
self.port = port
155
self.TXT = TXT if TXT is not None else []
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
156
121
self.domain = domain
157
122
self.host = host
158
123
self.rename_count = 0
159
124
self.max_renames = max_renames
160
self.protocol = protocol
161
self.group = None # our entry group
162
self.server = None
163
self.bus = bus
164
self.entry_group_state_changed_match = None
165
125
def rename(self):
166
126
"""Derived from the Avahi example code"""
167
127
if self.rename_count >= self.max_renames:
168
logger.critical("No suitable Zeroconf service name found"
169
" after %i retries, exiting.",
170
self.rename_count)
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
130
rename_count)
171
131
raise AvahiServiceError("Too many renames")
172
self.name = unicode(self.server
173
.GetAlternativeServiceName(self.name))
174
logger.info("Changing Zeroconf service name to %r ...",
175
self.name)
132
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))
176
138
self.remove()
177
try:
178
self.add()
179
except dbus.exceptions.DBusException as error:
180
logger.critical("DBusException: %s", error)
181
self.cleanup()
182
os._exit(1)
139
self.add()
183
140
self.rename_count += 1
184
141
def remove(self):
185
142
"""Derived from the Avahi example code"""
186
if self.entry_group_state_changed_match is not None:
187
self.entry_group_state_changed_match.remove()
188
self.entry_group_state_changed_match = None
189
if self.group is not None:
190
self.group.Reset()
143
if group is not None:
144
group.Reset()
191
145
def add(self):
192
146
"""Derived from the Avahi example code"""
193
self.remove()
194
if self.group is None:
195
self.group = dbus.Interface(
196
self.bus.get_object(avahi.DBUS_NAME,
197
self.server.EntryGroupNew()),
198
avahi.DBUS_INTERFACE_ENTRY_GROUP)
199
self.entry_group_state_changed_match = (
200
self.group.connect_to_signal(
201
'StateChanged', self.entry_group_state_changed))
202
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
203
self.name, self.type)
204
self.group.AddService(
205
self.interface,
206
self.protocol,
207
dbus.UInt32(0), # flags
208
self.name, self.type,
209
self.domain, self.host,
210
dbus.UInt16(self.port),
211
avahi.string_array_to_txt_array(self.TXT))
212
self.group.Commit()
213
def entry_group_state_changed(self, state, error):
214
"""Derived from the Avahi example code"""
215
logger.debug("Avahi entry group state change: %i", state)
216
217
if state == avahi.ENTRY_GROUP_ESTABLISHED:
218
logger.debug("Zeroconf service established.")
219
elif state == avahi.ENTRY_GROUP_COLLISION:
220
logger.info("Zeroconf service name collision.")
221
self.rename()
222
elif state == avahi.ENTRY_GROUP_FAILURE:
223
logger.critical("Avahi: Error in group state changed %s",
224
unicode(error))
225
raise AvahiGroupError("State changed: %s"
226
% unicode(error))
227
def cleanup(self):
228
"""Derived from the Avahi example code"""
229
if self.group is not None:
230
try:
231
self.group.Free()
232
except (dbus.exceptions.UnknownMethodException,
233
dbus.exceptions.DBusException) as e:
234
pass
235
self.group = None
236
self.remove()
237
def server_state_changed(self, state, error=None):
238
"""Derived from the Avahi example code"""
239
logger.debug("Avahi server state change: %i", state)
240
bad_states = { avahi.SERVER_INVALID:
241
"Zeroconf server invalid",
242
avahi.SERVER_REGISTERING: None,
243
avahi.SERVER_COLLISION:
244
"Zeroconf server name collision",
245
avahi.SERVER_FAILURE:
246
"Zeroconf server failure" }
247
if state in bad_states:
248
if bad_states[state] is not None:
249
if error is None:
250
logger.error(bad_states[state])
251
else:
252
logger.error(bad_states[state] + ": %r", error)
253
self.cleanup()
254
elif state == avahi.SERVER_RUNNING:
255
self.add()
256
else:
257
if error is None:
258
logger.debug("Unknown state: %r", state)
259
else:
260
logger.debug("Unknown state: %r: %r", state, error)
261
def activate(self):
262
"""Derived from the Avahi example code"""
263
if self.server is None:
264
self.server = dbus.Interface(
265
self.bus.get_object(avahi.DBUS_NAME,
266
avahi.DBUS_PATH_SERVER,
267
follow_name_owner_changes=True),
268
avahi.DBUS_INTERFACE_SERVER)
269
self.server.connect_to_signal("StateChanged",
270
self.server_state_changed)
271
self.server_state_changed(self.server.GetState())
272
273
class AvahiServiceToSyslog(AvahiService):
274
def rename(self):
275
"""Add the new name to the syslog messages"""
276
ret = AvahiService.rename(self)
277
syslogger.setFormatter(logging.Formatter
278
('Mandos (%s) [%%(process)d]:'
279
' %%(levelname)s: %%(message)s'
280
% self.name))
281
return ret
282
283
def _timedelta_to_milliseconds(td):
284
"Convert a datetime.timedelta() to milliseconds"
285
return ((td.days * 24 * 60 * 60 * 1000)
286
+ (td.seconds * 1000)
287
+ (td.microseconds // 1000))
288
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
289
172
class Client(object):
290
173
"""A representation of a client host served by this server.
291
292
174
Attributes:
293
_approved: bool(); 'None' if not yet approved/disapproved
294
approval_delay: datetime.timedelta(); Time to wait for approval
295
approval_duration: datetime.timedelta(); Duration of one approval
296
checker: subprocess.Popen(); a running checker process used
297
to see if the client lives.
298
'None' if no process is running.
299
checker_callback_tag: a gobject event source tag, or None
300
checker_command: string; External command which is run to check
301
if client lives. %() expansions are done at
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
302
194
runtime with vars(self) as dict, so that for
303
195
instance %(name)s can be used in the command.
304
checker_initiator_tag: a gobject event source tag, or None
305
created: datetime.datetime(); (UTC) object creation
306
client_structure: Object describing what attributes a client has
307
and is used for storing the client at exit
308
current_checker_command: string; current running checker_command
309
disable_initiator_tag: a gobject event source tag, or None
310
enabled: bool()
311
fingerprint: string (40 or 32 hexadecimal digits); used to
312
uniquely identify the client
313
host: string; available for use by the checker command
314
interval: datetime.timedelta(); How often to start a new checker
315
last_approval_request: datetime.datetime(); (UTC) or None
316
last_checked_ok: datetime.datetime(); (UTC) or None
317
last_checker_status: integer between 0 and 255 reflecting exit status
318
of last checker. -1 reflect crashed checker,
319
or None.
320
last_enabled: datetime.datetime(); (UTC)
321
name: string; from the config file, used in log messages and
322
D-Bus identifiers
323
secret: bytestring; sent verbatim (over TLS) to client
324
timeout: datetime.timedelta(); How long from last_checked_ok
325
until this client is disabled
326
extended_timeout: extra long timeout when password has been sent
327
runtime_expansions: Allowed attributes for runtime expansion.
328
expires: datetime.datetime(); time (UTC) when a client will be
329
disabled, or None
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: - '' -
330
201
"""
331
332
runtime_expansions = ("approval_delay", "approval_duration",
333
"created", "enabled", "fingerprint",
334
"host", "interval", "last_checked_ok",
335
"last_enabled", "name", "timeout")
336
337
def timeout_milliseconds(self):
338
"Return the 'timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.timeout)
340
341
def extended_timeout_milliseconds(self):
342
"Return the 'extended_timeout' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.extended_timeout)
344
345
def interval_milliseconds(self):
346
"Return the 'interval' attribute in milliseconds"
347
return _timedelta_to_milliseconds(self.interval)
348
349
def approval_delay_milliseconds(self):
350
return _timedelta_to_milliseconds(self.approval_delay)
351
352
def __init__(self, name = None, config=None):
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={}):
353
226
"""Note: the 'checker' key in 'config' sets the
354
227
'checker_command' attribute and *not* the 'checker'
355
228
attribute."""
356
229
self.name = name
357
if config is None:
358
config = {}
359
logger.debug("Creating client %r", self.name)
230
logger.debug(u"Creating client %r", self.name)
360
231
# Uppercase and remove spaces from fingerprint for later
361
232
# comparison purposes with return value from the fingerprint()
362
233
# function
363
self.fingerprint = (config["fingerprint"].upper()
364
.replace(" ", ""))
365
logger.debug(" Fingerprint: %s", self.fingerprint)
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
366
237
if "secret" in config:
367
self.secret = config["secret"].decode("base64")
238
self.secret = config["secret"].decode(u"base64")
368
239
elif "secfile" in config:
369
with open(os.path.expanduser(os.path.expandvars
370
(config["secfile"])),
371
"rb") as secfile:
372
self.secret = secfile.read()
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
373
243
else:
374
raise TypeError("No secret or secfile for client %s"
244
raise TypeError(u"No secret or secfile for client %s"
375
245
% self.name)
376
246
self.host = config.get("host", "")
377
self.created = datetime.datetime.utcnow()
378
self.enabled = True
379
self.last_approval_request = None
380
self.last_enabled = datetime.datetime.utcnow()
247
self.created = datetime.datetime.now()
381
248
self.last_checked_ok = None
382
self.last_checker_status = None
383
249
self.timeout = string_to_delta(config["timeout"])
384
self.extended_timeout = string_to_delta(config
385
["extended_timeout"])
386
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
387
252
self.checker = None
388
253
self.checker_initiator_tag = None
389
self.disable_initiator_tag = None
390
self.expires = datetime.datetime.utcnow() + self.timeout
254
self.stop_initiator_tag = None
391
255
self.checker_callback_tag = None
392
self.checker_command = config["checker"]
393
self.current_checker_command = None
394
self._approved = None
395
self.approved_by_default = config.get("approved_by_default",
396
True)
397
self.approvals_pending = 0
398
self.approval_delay = string_to_delta(
399
config["approval_delay"])
400
self.approval_duration = string_to_delta(
401
config["approval_duration"])
402
self.changedstate = (multiprocessing_manager
403
.Condition(multiprocessing_manager
404
.Lock()))
405
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
406
self.client_structure.append("client_structure")
407
408
409
for name, t in inspect.getmembers(type(self),
410
lambda obj: isinstance(obj, property)):
411
if not name.startswith("_"):
412
self.client_structure.append(name)
413
414
# Send notice to process children that client state has changed
415
def send_changedstate(self):
416
with self.changedstate:
417
self.changedstate.notify_all()
418
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 encrypted_secret
599
def encrypt_secret(self, key):
600
# Encryption-key need to be of a specific size, so we hash inputed key
601
hasheng = hashlib.sha256()
602
hasheng.update(key)
603
encryptionkey = hasheng.digest()
604
605
# Create validation hash so we know at decryption if it was sucessful
606
hasheng = hashlib.sha256()
607
hasheng.update(self.secret)
608
validationhash = hasheng.digest()
609
610
# Encrypt secret
611
iv = os.urandom(Crypto.Cipher.AES.block_size)
612
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
613
Crypto.Cipher.AES.MODE_CFB, iv)
614
ciphertext = ciphereng.encrypt(validationhash+self.secret)
615
self.encrypted_secret = (ciphertext, iv)
616
617
# Decrypt a encrypted client secret
618
def decrypt_secret(self, key):
619
# Decryption-key need to be of a specific size, so we hash inputed key
620
hasheng = hashlib.sha256()
621
hasheng.update(key)
622
encryptionkey = hasheng.digest()
623
624
# Decrypt encrypted secret
625
ciphertext, iv = self.encrypted_secret
626
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
627
Crypto.Cipher.AES.MODE_CFB, iv)
628
plain = ciphereng.decrypt(ciphertext)
629
630
# Validate decrypted secret to know if it was succesful
631
hasheng = hashlib.sha256()
632
validationhash = plain[:hasheng.digest_size]
633
secret = plain[hasheng.digest_size:]
634
hasheng.update(secret)
635
636
# if validation fails, we use key as new secret. Otherwhise, we use
637
# the decrypted secret
638
if hasheng.digest() == validationhash:
639
self.secret = secret
640
else:
641
self.secret = key
642
del self.encrypted_secret
643
644
645
def dbus_service_property(dbus_interface, signature="v",
646
access="readwrite", byte_arrays=False):
647
"""Decorators for marking methods of a DBusObjectWithProperties to
648
become properties on the D-Bus.
649
650
The decorated method will be called with no arguments by "Get"
651
and with one argument by "Set".
652
653
The parameters, where they are supported, are the same as
654
dbus.service.method, except there is only "signature", since the
655
type from Get() and the type sent to Set() is the same.
656
"""
657
# Encoding deeply encoded byte arrays is not supported yet by the
658
# "Set" method, so we fail early here:
659
if byte_arrays and signature != "ay":
660
raise ValueError("Byte arrays not supported for non-'ay'"
661
" signature %r" % signature)
662
def decorator(func):
663
func._dbus_is_property = True
664
func._dbus_interface = dbus_interface
665
func._dbus_signature = signature
666
func._dbus_access = access
667
func._dbus_name = func.__name__
668
if func._dbus_name.endswith("_dbus_property"):
669
func._dbus_name = func._dbus_name[:-14]
670
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
671
return func
672
return decorator
673
674
675
class DBusPropertyException(dbus.exceptions.DBusException):
676
"""A base class for D-Bus property-related exceptions
677
"""
678
def __unicode__(self):
679
return unicode(str(self))
680
681
682
class DBusPropertyAccessException(DBusPropertyException):
683
"""A property's access permissions disallows an operation.
684
"""
685
pass
686
687
688
class DBusPropertyNotFound(DBusPropertyException):
689
"""An attempt was made to access a non-existing property.
690
"""
691
pass
692
693
694
class DBusObjectWithProperties(dbus.service.Object):
695
"""A D-Bus object with properties.
696
697
Classes inheriting from this can use the dbus_service_property
698
decorator to expose methods as D-Bus properties. It exposes the
699
standard Get(), Set(), and GetAll() methods on the D-Bus.
700
"""
701
702
@staticmethod
703
def _is_dbus_property(obj):
704
return getattr(obj, "_dbus_is_property", False)
705
706
def _get_all_dbus_properties(self):
707
"""Returns a generator of (name, attribute) pairs
708
"""
709
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
710
for cls in self.__class__.__mro__
711
for name, prop in
712
inspect.getmembers(cls, self._is_dbus_property))
713
714
def _get_dbus_property(self, interface_name, property_name):
715
"""Returns a bound method if one exists which is a D-Bus
716
property with the specified name and interface.
717
"""
718
for cls in self.__class__.__mro__:
719
for name, value in (inspect.getmembers
720
(cls, self._is_dbus_property)):
721
if (value._dbus_name == property_name
722
and value._dbus_interface == interface_name):
723
return value.__get__(self)
724
725
# No such property
726
raise DBusPropertyNotFound(self.dbus_object_path + ":"
727
+ interface_name + "."
728
+ property_name)
729
730
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
731
out_signature="v")
732
def Get(self, interface_name, property_name):
733
"""Standard D-Bus property Get() method, see D-Bus standard.
734
"""
735
prop = self._get_dbus_property(interface_name, property_name)
736
if prop._dbus_access == "write":
737
raise DBusPropertyAccessException(property_name)
738
value = prop()
739
if not hasattr(value, "variant_level"):
740
return value
741
return type(value)(value, variant_level=value.variant_level+1)
742
743
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
744
def Set(self, interface_name, property_name, value):
745
"""Standard D-Bus property Set() method, see D-Bus standard.
746
"""
747
prop = self._get_dbus_property(interface_name, property_name)
748
if prop._dbus_access == "read":
749
raise DBusPropertyAccessException(property_name)
750
if prop._dbus_get_args_options["byte_arrays"]:
751
# The byte_arrays option is not supported yet on
752
# signatures other than "ay".
753
if prop._dbus_signature != "ay":
754
raise ValueError
755
value = dbus.ByteArray(''.join(unichr(byte)
756
for byte in value))
757
prop(value)
758
759
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
760
out_signature="a{sv}")
761
def GetAll(self, interface_name):
762
"""Standard D-Bus property GetAll() method, see D-Bus
763
standard.
764
765
Note: Will not include properties with access="write".
766
"""
767
all = {}
768
for name, prop in self._get_all_dbus_properties():
769
if (interface_name
770
and interface_name != prop._dbus_interface):
771
# Interface non-empty but did not match
772
continue
773
# Ignore write-only properties
774
if prop._dbus_access == "write":
775
continue
776
value = prop()
777
if not hasattr(value, "variant_level"):
778
all[name] = value
779
continue
780
all[name] = type(value)(value, variant_level=
781
value.variant_level+1)
782
return dbus.Dictionary(all, signature="sv")
783
784
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
785
out_signature="s",
786
path_keyword='object_path',
787
connection_keyword='connection')
788
def Introspect(self, object_path, connection):
789
"""Standard D-Bus method, overloaded to insert property tags.
790
"""
791
xmlstring = dbus.service.Object.Introspect(self, object_path,
792
connection)
793
try:
794
document = xml.dom.minidom.parseString(xmlstring)
795
def make_tag(document, name, prop):
796
e = document.createElement("property")
797
e.setAttribute("name", name)
798
e.setAttribute("type", prop._dbus_signature)
799
e.setAttribute("access", prop._dbus_access)
800
return e
801
for if_tag in document.getElementsByTagName("interface"):
802
for tag in (make_tag(document, name, prop)
803
for name, prop
804
in self._get_all_dbus_properties()
805
if prop._dbus_interface
806
== if_tag.getAttribute("name")):
807
if_tag.appendChild(tag)
808
# Add the names to the return values for the
809
# "org.freedesktop.DBus.Properties" methods
810
if (if_tag.getAttribute("name")
811
== "org.freedesktop.DBus.Properties"):
812
for cn in if_tag.getElementsByTagName("method"):
813
if cn.getAttribute("name") == "Get":
814
for arg in cn.getElementsByTagName("arg"):
815
if (arg.getAttribute("direction")
816
== "out"):
817
arg.setAttribute("name", "value")
818
elif cn.getAttribute("name") == "GetAll":
819
for arg in cn.getElementsByTagName("arg"):
820
if (arg.getAttribute("direction")
821
== "out"):
822
arg.setAttribute("name", "props")
823
xmlstring = document.toxml("utf-8")
824
document.unlink()
825
except (AttributeError, xml.dom.DOMException,
826
xml.parsers.expat.ExpatError) as error:
827
logger.error("Failed to override Introspection method",
828
error)
829
return xmlstring
830
831
832
def datetime_to_dbus (dt, variant_level=0):
833
"""Convert a UTC datetime.datetime() to a D-Bus type."""
834
if dt is None:
835
return dbus.String("", variant_level = variant_level)
836
return dbus.String(dt.isoformat(),
837
variant_level=variant_level)
838
839
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
840
.__metaclass__):
841
"""Applied to an empty subclass of a D-Bus object, this metaclass
842
will add additional D-Bus attributes matching a certain pattern.
843
"""
844
def __new__(mcs, name, bases, attr):
845
# Go through all the base classes which could have D-Bus
846
# methods, signals, or properties in them
847
for base in (b for b in bases
848
if issubclass(b, dbus.service.Object)):
849
# Go though all attributes of the base class
850
for attrname, attribute in inspect.getmembers(base):
851
# Ignore non-D-Bus attributes, and D-Bus attributes
852
# with the wrong interface name
853
if (not hasattr(attribute, "_dbus_interface")
854
or not attribute._dbus_interface
855
.startswith("se.recompile.Mandos")):
856
continue
857
# Create an alternate D-Bus interface name based on
858
# the current name
859
alt_interface = (attribute._dbus_interface
860
.replace("se.recompile.Mandos",
861
"se.bsnet.fukt.Mandos"))
862
# Is this a D-Bus signal?
863
if getattr(attribute, "_dbus_is_signal", False):
864
# Extract the original non-method function by
865
# black magic
866
nonmethod_func = (dict(
867
zip(attribute.func_code.co_freevars,
868
attribute.__closure__))["func"]
869
.cell_contents)
870
# Create a new, but exactly alike, function
871
# object, and decorate it to be a new D-Bus signal
872
# with the alternate D-Bus interface name
873
new_function = (dbus.service.signal
874
(alt_interface,
875
attribute._dbus_signature)
876
(types.FunctionType(
877
nonmethod_func.func_code,
878
nonmethod_func.func_globals,
879
nonmethod_func.func_name,
880
nonmethod_func.func_defaults,
881
nonmethod_func.func_closure)))
882
# Define a creator of a function to call both the
883
# old and new functions, so both the old and new
884
# signals gets sent when the function is called
885
def fixscope(func1, func2):
886
"""This function is a scope container to pass
887
func1 and func2 to the "call_both" function
888
outside of its arguments"""
889
def call_both(*args, **kwargs):
890
"""This function will emit two D-Bus
891
signals by calling func1 and func2"""
892
func1(*args, **kwargs)
893
func2(*args, **kwargs)
894
return call_both
895
# Create the "call_both" function and add it to
896
# the class
897
attr[attrname] = fixscope(attribute,
898
new_function)
899
# Is this a D-Bus method?
900
elif getattr(attribute, "_dbus_is_method", False):
901
# Create a new, but exactly alike, function
902
# object. Decorate it to be a new D-Bus method
903
# with the alternate D-Bus interface name. Add it
904
# to the class.
905
attr[attrname] = (dbus.service.method
906
(alt_interface,
907
attribute._dbus_in_signature,
908
attribute._dbus_out_signature)
909
(types.FunctionType
910
(attribute.func_code,
911
attribute.func_globals,
912
attribute.func_name,
913
attribute.func_defaults,
914
attribute.func_closure)))
915
# Is this a D-Bus property?
916
elif getattr(attribute, "_dbus_is_property", False):
917
# Create a new, but exactly alike, function
918
# object, and decorate it to be a new D-Bus
919
# property with the alternate D-Bus interface
920
# name. Add it to the class.
921
attr[attrname] = (dbus_service_property
922
(alt_interface,
923
attribute._dbus_signature,
924
attribute._dbus_access,
925
attribute
926
._dbus_get_args_options
927
["byte_arrays"])
928
(types.FunctionType
929
(attribute.func_code,
930
attribute.func_globals,
931
attribute.func_name,
932
attribute.func_defaults,
933
attribute.func_closure)))
934
return type.__new__(mcs, name, bases, attr)
935
936
class ClientDBus(Client, DBusObjectWithProperties):
937
"""A Client class using D-Bus
938
939
Attributes:
940
dbus_object_path: dbus.ObjectPath
941
bus: dbus.SystemBus()
942
"""
943
944
runtime_expansions = (Client.runtime_expansions
945
+ ("dbus_object_path",))
946
947
# dbus.service.Object doesn't use super(), so we can't either.
948
949
def __init__(self, bus = None, *args, **kwargs):
950
self.bus = bus
951
Client.__init__(self, *args, **kwargs)
952
953
self._approvals_pending = 0
954
# Only now, when this client is initialized, can it show up on
955
# the D-Bus
956
client_object_name = unicode(self.name).translate(
957
{ord("."): ord("_"),
958
ord("-"): ord("_")})
959
self.dbus_object_path = (dbus.ObjectPath
960
("/clients/" + client_object_name))
961
DBusObjectWithProperties.__init__(self, self.bus,
962
self.dbus_object_path)
963
964
def notifychangeproperty(transform_func,
965
dbus_name, type_func=lambda x: x,
966
variant_level=1):
967
""" Modify a variable so that it's a property which announces
968
its changes to DBus.
969
970
transform_fun: Function that takes a value and a variant_level
971
and transforms it to a D-Bus type.
972
dbus_name: D-Bus name of the variable
973
type_func: Function that transform the value before sending it
974
to the D-Bus. Default: no transform
975
variant_level: D-Bus variant level. Default: 1
976
"""
977
attrname = "_{0}".format(dbus_name)
978
def setter(self, value):
979
if hasattr(self, "dbus_object_path"):
980
if (not hasattr(self, attrname) or
981
type_func(getattr(self, attrname, None))
982
!= type_func(value)):
983
dbus_value = transform_func(type_func(value),
984
variant_level
985
=variant_level)
986
self.PropertyChanged(dbus.String(dbus_name),
987
dbus_value)
988
setattr(self, attrname, value)
989
990
return property(lambda self: getattr(self, attrname), setter)
991
992
993
expires = notifychangeproperty(datetime_to_dbus, "Expires")
994
approvals_pending = notifychangeproperty(dbus.Boolean,
995
"ApprovalPending",
996
type_func = bool)
997
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
998
last_enabled = notifychangeproperty(datetime_to_dbus,
999
"LastEnabled")
1000
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1001
type_func = lambda checker:
1002
checker is not None)
1003
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1004
"LastCheckedOK")
1005
last_approval_request = notifychangeproperty(
1006
datetime_to_dbus, "LastApprovalRequest")
1007
approved_by_default = notifychangeproperty(dbus.Boolean,
1008
"ApprovedByDefault")
1009
approval_delay = notifychangeproperty(dbus.UInt16,
1010
"ApprovalDelay",
1011
type_func =
1012
_timedelta_to_milliseconds)
1013
approval_duration = notifychangeproperty(
1014
dbus.UInt16, "ApprovalDuration",
1015
type_func = _timedelta_to_milliseconds)
1016
host = notifychangeproperty(dbus.String, "Host")
1017
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1018
type_func =
1019
_timedelta_to_milliseconds)
1020
extended_timeout = notifychangeproperty(
1021
dbus.UInt16, "ExtendedTimeout",
1022
type_func = _timedelta_to_milliseconds)
1023
interval = notifychangeproperty(dbus.UInt16,
1024
"Interval",
1025
type_func =
1026
_timedelta_to_milliseconds)
1027
checker_command = notifychangeproperty(dbus.String, "Checker")
1028
1029
del notifychangeproperty
1030
1031
def __del__(self, *args, **kwargs):
1032
try:
1033
self.remove_from_connection()
1034
except LookupError:
1035
pass
1036
if hasattr(DBusObjectWithProperties, "__del__"):
1037
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1038
Client.__del__(self, *args, **kwargs)
1039
1040
def checker_callback(self, pid, condition, command,
1041
*args, **kwargs):
1042
self.checker_callback_tag = None
1043
self.checker = None
1044
if os.WIFEXITED(condition):
1045
exitstatus = os.WEXITSTATUS(condition)
1046
# Emit D-Bus signal
1047
self.CheckerCompleted(dbus.Int16(exitstatus),
1048
dbus.Int64(condition),
1049
dbus.String(command))
1050
else:
1051
# Emit D-Bus signal
1052
self.CheckerCompleted(dbus.Int16(-1),
1053
dbus.Int64(condition),
1054
dbus.String(command))
1055
1056
return Client.checker_callback(self, pid, condition, command,
1057
*args, **kwargs)
1058
1059
def start_checker(self, *args, **kwargs):
1060
old_checker = self.checker
1061
if self.checker is not None:
1062
old_checker_pid = self.checker.pid
1063
else:
1064
old_checker_pid = None
1065
r = Client.start_checker(self, *args, **kwargs)
1066
# Only if new checker process was started
1067
if (self.checker is not None
1068
and old_checker_pid != self.checker.pid):
1069
# Emit D-Bus signal
1070
self.CheckerStarted(self.current_checker_command)
1071
return r
1072
1073
def _reset_approved(self):
1074
self._approved = None
1075
return False
1076
1077
def approve(self, value=True):
1078
self.send_changedstate()
1079
self._approved = value
1080
gobject.timeout_add(_timedelta_to_milliseconds
1081
(self.approval_duration),
1082
self._reset_approved)
1083
1084
1085
## D-Bus methods, signals & properties
1086
_interface = "se.recompile.Mandos.Client"
1087
1088
## Signals
1089
1090
# CheckerCompleted - signal
1091
@dbus.service.signal(_interface, signature="nxs")
1092
def CheckerCompleted(self, exitcode, waitstatus, command):
1093
"D-Bus signal"
1094
pass
1095
1096
# CheckerStarted - signal
1097
@dbus.service.signal(_interface, signature="s")
1098
def CheckerStarted(self, command):
1099
"D-Bus signal"
1100
pass
1101
1102
# PropertyChanged - signal
1103
@dbus.service.signal(_interface, signature="sv")
1104
def PropertyChanged(self, property, value):
1105
"D-Bus signal"
1106
pass
1107
1108
# GotSecret - signal
1109
@dbus.service.signal(_interface)
1110
def GotSecret(self):
1111
"""D-Bus signal
1112
Is sent after a successful transfer of secret from the Mandos
1113
server to mandos-client
1114
"""
1115
pass
1116
1117
# Rejected - signal
1118
@dbus.service.signal(_interface, signature="s")
1119
def Rejected(self, reason):
1120
"D-Bus signal"
1121
pass
1122
1123
# NeedApproval - signal
1124
@dbus.service.signal(_interface, signature="tb")
1125
def NeedApproval(self, timeout, default):
1126
"D-Bus signal"
1127
return self.need_approval()
1128
1129
# NeRwequest - signal
1130
@dbus.service.signal(_interface, signature="s")
1131
def NewRequest(self, ip):
1132
"""D-Bus signal
1133
Is sent after a client request a password.
1134
"""
1135
pass
1136
1137
## Methods
1138
1139
# Approve - method
1140
@dbus.service.method(_interface, in_signature="b")
1141
def Approve(self, value):
1142
self.approve(value)
1143
1144
# CheckedOK - method
1145
@dbus.service.method(_interface)
1146
def CheckedOK(self):
1147
self.checked_ok()
1148
1149
# Enable - method
1150
@dbus.service.method(_interface)
1151
def Enable(self):
1152
"D-Bus method"
1153
self.enable()
1154
1155
# StartChecker - method
1156
@dbus.service.method(_interface)
1157
def StartChecker(self):
1158
"D-Bus method"
1159
self.start_checker()
1160
1161
# Disable - method
1162
@dbus.service.method(_interface)
1163
def Disable(self):
1164
"D-Bus method"
1165
self.disable()
1166
1167
# StopChecker - method
1168
@dbus.service.method(_interface)
1169
def StopChecker(self):
1170
self.stop_checker()
1171
1172
## Properties
1173
1174
# ApprovalPending - property
1175
@dbus_service_property(_interface, signature="b", access="read")
1176
def ApprovalPending_dbus_property(self):
1177
return dbus.Boolean(bool(self.approvals_pending))
1178
1179
# ApprovedByDefault - property
1180
@dbus_service_property(_interface, signature="b",
1181
access="readwrite")
1182
def ApprovedByDefault_dbus_property(self, value=None):
1183
if value is None: # get
1184
return dbus.Boolean(self.approved_by_default)
1185
self.approved_by_default = bool(value)
1186
1187
# ApprovalDelay - property
1188
@dbus_service_property(_interface, signature="t",
1189
access="readwrite")
1190
def ApprovalDelay_dbus_property(self, value=None):
1191
if value is None: # get
1192
return dbus.UInt64(self.approval_delay_milliseconds())
1193
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1194
1195
# ApprovalDuration - property
1196
@dbus_service_property(_interface, signature="t",
1197
access="readwrite")
1198
def ApprovalDuration_dbus_property(self, value=None):
1199
if value is None: # get
1200
return dbus.UInt64(_timedelta_to_milliseconds(
1201
self.approval_duration))
1202
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1203
1204
# Name - property
1205
@dbus_service_property(_interface, signature="s", access="read")
1206
def Name_dbus_property(self):
1207
return dbus.String(self.name)
1208
1209
# Fingerprint - property
1210
@dbus_service_property(_interface, signature="s", access="read")
1211
def Fingerprint_dbus_property(self):
1212
return dbus.String(self.fingerprint)
1213
1214
# Host - property
1215
@dbus_service_property(_interface, signature="s",
1216
access="readwrite")
1217
def Host_dbus_property(self, value=None):
1218
if value is None: # get
1219
return dbus.String(self.host)
1220
self.host = value
1221
1222
# Created - property
1223
@dbus_service_property(_interface, signature="s", access="read")
1224
def Created_dbus_property(self):
1225
return dbus.String(datetime_to_dbus(self.created))
1226
1227
# LastEnabled - property
1228
@dbus_service_property(_interface, signature="s", access="read")
1229
def LastEnabled_dbus_property(self):
1230
return datetime_to_dbus(self.last_enabled)
1231
1232
# Enabled - property
1233
@dbus_service_property(_interface, signature="b",
1234
access="readwrite")
1235
def Enabled_dbus_property(self, value=None):
1236
if value is None: # get
1237
return dbus.Boolean(self.enabled)
1238
if value:
1239
self.enable()
1240
else:
1241
self.disable()
1242
1243
# LastCheckedOK - property
1244
@dbus_service_property(_interface, signature="s",
1245
access="readwrite")
1246
def LastCheckedOK_dbus_property(self, value=None):
1247
if value is not None:
1248
self.checked_ok()
1249
return
1250
return datetime_to_dbus(self.last_checked_ok)
1251
1252
# Expires - property
1253
@dbus_service_property(_interface, signature="s", access="read")
1254
def Expires_dbus_property(self):
1255
return datetime_to_dbus(self.expires)
1256
1257
# LastApprovalRequest - property
1258
@dbus_service_property(_interface, signature="s", access="read")
1259
def LastApprovalRequest_dbus_property(self):
1260
return datetime_to_dbus(self.last_approval_request)
1261
1262
# Timeout - property
1263
@dbus_service_property(_interface, signature="t",
1264
access="readwrite")
1265
def Timeout_dbus_property(self, value=None):
1266
if value is None: # get
1267
return dbus.UInt64(self.timeout_milliseconds())
1268
self.timeout = datetime.timedelta(0, 0, 0, value)
1269
if getattr(self, "disable_initiator_tag", None) is None:
1270
return
1271
# Reschedule timeout
1272
gobject.source_remove(self.disable_initiator_tag)
1273
self.disable_initiator_tag = None
1274
self.expires = None
1275
time_to_die = _timedelta_to_milliseconds((self
1276
.last_checked_ok
1277
+ self.timeout)
1278
- datetime.datetime
1279
.utcnow())
1280
if time_to_die <= 0:
1281
# The timeout has passed
1282
self.disable()
1283
else:
1284
self.expires = (datetime.datetime.utcnow()
1285
+ datetime.timedelta(milliseconds =
1286
time_to_die))
1287
self.disable_initiator_tag = (gobject.timeout_add
1288
(time_to_die, self.disable))
1289
1290
# ExtendedTimeout - property
1291
@dbus_service_property(_interface, signature="t",
1292
access="readwrite")
1293
def ExtendedTimeout_dbus_property(self, value=None):
1294
if value is None: # get
1295
return dbus.UInt64(self.extended_timeout_milliseconds())
1296
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1297
1298
# Interval - property
1299
@dbus_service_property(_interface, signature="t",
1300
access="readwrite")
1301
def Interval_dbus_property(self, value=None):
1302
if value is None: # get
1303
return dbus.UInt64(self.interval_milliseconds())
1304
self.interval = datetime.timedelta(0, 0, 0, value)
1305
if getattr(self, "checker_initiator_tag", None) is None:
1306
return
1307
# Reschedule checker run
1308
gobject.source_remove(self.checker_initiator_tag)
1309
self.checker_initiator_tag = (gobject.timeout_add
1310
(value, self.start_checker))
1311
self.start_checker() # Start one now, too
1312
1313
# Checker - property
1314
@dbus_service_property(_interface, signature="s",
1315
access="readwrite")
1316
def Checker_dbus_property(self, value=None):
1317
if value is None: # get
1318
return dbus.String(self.checker_command)
1319
self.checker_command = value
1320
1321
# CheckerRunning - property
1322
@dbus_service_property(_interface, signature="b",
1323
access="readwrite")
1324
def CheckerRunning_dbus_property(self, value=None):
1325
if value is None: # get
1326
return dbus.Boolean(self.checker is not None)
1327
if value:
1328
self.start_checker()
1329
else:
1330
self.stop_checker()
1331
1332
# ObjectPath - property
1333
@dbus_service_property(_interface, signature="o", access="read")
1334
def ObjectPath_dbus_property(self):
1335
return self.dbus_object_path # is already a dbus.ObjectPath
1336
1337
# Secret = property
1338
@dbus_service_property(_interface, signature="ay",
1339
access="write", byte_arrays=True)
1340
def Secret_dbus_property(self, value):
1341
self.secret = str(value)
1342
1343
del _interface
1344
1345
1346
class ProxyClient(object):
1347
def __init__(self, child_pipe, fpr, address):
1348
self._pipe = child_pipe
1349
self._pipe.send(('init', fpr, address))
1350
if not self._pipe.recv():
1351
raise KeyError()
1352
1353
def __getattribute__(self, name):
1354
if(name == '_pipe'):
1355
return super(ProxyClient, self).__getattribute__(name)
1356
self._pipe.send(('getattr', name))
1357
data = self._pipe.recv()
1358
if data[0] == 'data':
1359
return data[1]
1360
if data[0] == 'function':
1361
def func(*args, **kwargs):
1362
self._pipe.send(('funcall', name, args, kwargs))
1363
return self._pipe.recv()[1]
1364
return func
1365
1366
def __setattr__(self, name, value):
1367
if(name == '_pipe'):
1368
return super(ProxyClient, self).__setattr__(name, value)
1369
self._pipe.send(('setattr', name, value))
1370
1371
class ClientDBusTransitional(ClientDBus):
1372
__metaclass__ = AlternateDBusNamesMetaclass
1373
1374
class ClientHandler(socketserver.BaseRequestHandler, object):
1375
"""A class to handle client connections.
1376
1377
Instantiated once for each connection to handle it.
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.
1378
442
Note: This will run in its own forked process."""
1379
443
1380
444
def handle(self):
1381
with contextlib.closing(self.server.child_pipe) as child_pipe:
1382
logger.info("TCP connection from: %s",
1383
unicode(self.client_address))
1384
logger.debug("Pipe FD: %d",
1385
self.server.child_pipe.fileno())
1386
1387
session = (gnutls.connection
1388
.ClientSession(self.request,
1389
gnutls.connection
1390
.X509Credentials()))
1391
1392
# Note: gnutls.connection.X509Credentials is really a
1393
# generic GnuTLS certificate credentials object so long as
1394
# no X.509 keys are added to it. Therefore, we can use it
1395
# here despite using OpenPGP certificates.
1396
1397
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1398
# "+AES-256-CBC", "+SHA1",
1399
# "+COMP-NULL", "+CTYPE-OPENPGP",
1400
# "+DHE-DSS"))
1401
# Use a fallback default, since this MUST be set.
1402
priority = self.server.gnutls_priority
1403
if priority is None:
1404
priority = "NORMAL"
1405
(gnutls.library.functions
1406
.gnutls_priority_set_direct(session._c_object,
1407
priority, None))
1408
1409
# Start communication using the Mandos protocol
1410
# Get protocol number
1411
line = self.request.makefile().readline()
1412
logger.debug("Protocol version: %r", line)
1413
try:
1414
if int(line.strip().split()[0]) > 1:
1415
raise RuntimeError
1416
except (ValueError, IndexError, RuntimeError) as error:
1417
logger.error("Unknown protocol version: %s", error)
1418
return
1419
1420
# Start GnuTLS connection
1421
try:
1422
session.handshake()
1423
except gnutls.errors.GNUTLSError as error:
1424
logger.warning("Handshake failed: %s", error)
1425
# Do not run session.bye() here: the session is not
1426
# established. Just abandon the request.
1427
return
1428
logger.debug("Handshake succeeded")
1429
1430
approval_required = False
1431
try:
1432
try:
1433
fpr = self.fingerprint(self.peer_certificate
1434
(session))
1435
except (TypeError,
1436
gnutls.errors.GNUTLSError) as error:
1437
logger.warning("Bad certificate: %s", error)
1438
return
1439
logger.debug("Fingerprint: %s", fpr)
1440
if self.server.use_dbus:
1441
# Emit D-Bus signal
1442
client.NewRequest(str(self.client_address))
1443
1444
try:
1445
client = ProxyClient(child_pipe, fpr,
1446
self.client_address)
1447
except KeyError:
1448
return
1449
1450
if client.approval_delay:
1451
delay = client.approval_delay
1452
client.approvals_pending += 1
1453
approval_required = True
1454
1455
while True:
1456
if not client.enabled:
1457
logger.info("Client %s is disabled",
1458
client.name)
1459
if self.server.use_dbus:
1460
# Emit D-Bus signal
1461
client.Rejected("Disabled")
1462
return
1463
1464
if client._approved or not client.approval_delay:
1465
#We are approved or approval is disabled
1466
break
1467
elif client._approved is None:
1468
logger.info("Client %s needs approval",
1469
client.name)
1470
if self.server.use_dbus:
1471
# Emit D-Bus signal
1472
client.NeedApproval(
1473
client.approval_delay_milliseconds(),
1474
client.approved_by_default)
1475
else:
1476
logger.warning("Client %s was not approved",
1477
client.name)
1478
if self.server.use_dbus:
1479
# Emit D-Bus signal
1480
client.Rejected("Denied")
1481
return
1482
1483
#wait until timeout or approved
1484
time = datetime.datetime.now()
1485
client.changedstate.acquire()
1486
(client.changedstate.wait
1487
(float(client._timedelta_to_milliseconds(delay)
1488
/ 1000)))
1489
client.changedstate.release()
1490
time2 = datetime.datetime.now()
1491
if (time2 - time) >= delay:
1492
if not client.approved_by_default:
1493
logger.warning("Client %s timed out while"
1494
" waiting for approval",
1495
client.name)
1496
if self.server.use_dbus:
1497
# Emit D-Bus signal
1498
client.Rejected("Approval timed out")
1499
return
1500
else:
1501
break
1502
else:
1503
delay -= time2 - time
1504
1505
sent_size = 0
1506
while sent_size < len(client.secret):
1507
try:
1508
sent = session.send(client.secret[sent_size:])
1509
except gnutls.errors.GNUTLSError as error:
1510
logger.warning("gnutls send failed")
1511
return
1512
logger.debug("Sent: %d, remaining: %d",
1513
sent, len(client.secret)
1514
- (sent_size + sent))
1515
sent_size += sent
1516
1517
logger.info("Sending secret to %s", client.name)
1518
# bump the timeout using extended_timeout
1519
client.checked_ok(client.extended_timeout)
1520
if self.server.use_dbus:
1521
# Emit D-Bus signal
1522
client.GotSecret()
1523
1524
finally:
1525
if approval_required:
1526
client.approvals_pending -= 1
1527
try:
1528
session.bye()
1529
except gnutls.errors.GNUTLSError as error:
1530
logger.warning("GnuTLS bye failed")
1531
1532
@staticmethod
1533
def peer_certificate(session):
1534
"Return the peer's OpenPGP certificate as a bytestring"
1535
# If not an OpenPGP certificate...
1536
if (gnutls.library.functions
1537
.gnutls_certificate_type_get(session._c_object)
1538
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1539
# ...do the normal thing
1540
return session.peer_certificate
1541
list_size = ctypes.c_uint(1)
1542
cert_list = (gnutls.library.functions
1543
.gnutls_certificate_get_peers
1544
(session._c_object, ctypes.byref(list_size)))
1545
if not bool(cert_list) and list_size.value != 0:
1546
raise gnutls.errors.GNUTLSError("error getting peer"
1547
" certificate")
1548
if list_size.value == 0:
1549
return None
1550
cert = cert_list[0]
1551
return ctypes.string_at(cert.data, cert.size)
1552
1553
@staticmethod
1554
def fingerprint(openpgp):
1555
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1556
# New GnuTLS "datum" with the OpenPGP public key
1557
datum = (gnutls.library.types
1558
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1559
ctypes.POINTER
1560
(ctypes.c_ubyte)),
1561
ctypes.c_uint(len(openpgp))))
1562
# New empty GnuTLS certificate
1563
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1564
(gnutls.library.functions
1565
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1566
# Import the OpenPGP public key into the certificate
1567
(gnutls.library.functions
1568
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1569
gnutls.library.constants
1570
.GNUTLS_OPENPGP_FMT_RAW))
1571
# Verify the self signature in the key
1572
crtverify = ctypes.c_uint()
1573
(gnutls.library.functions
1574
.gnutls_openpgp_crt_verify_self(crt, 0,
1575
ctypes.byref(crtverify)))
1576
if crtverify.value != 0:
1577
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1578
raise (gnutls.errors.CertificateSecurityError
1579
("Verify failed"))
1580
# New buffer for the fingerprint
1581
buf = ctypes.create_string_buffer(20)
1582
buf_len = ctypes.c_size_t()
1583
# Get the fingerprint from the certificate into the buffer
1584
(gnutls.library.functions
1585
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1586
ctypes.byref(buf_len)))
1587
# Deinit the certificate
1588
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1589
# Convert the buffer to a Python bytestring
1590
fpr = ctypes.string_at(buf, buf_len.value)
1591
# Convert the bytestring to hexadecimal notation
1592
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1593
return hex_fpr
1594
1595
1596
class MultiprocessingMixIn(object):
1597
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1598
def sub_process_main(self, request, address):
1599
try:
1600
self.finish_request(request, address)
1601
except:
1602
self.handle_error(request, address)
1603
self.close_request(request)
1604
1605
def process_request(self, request, address):
1606
"""Start a new process to process the request."""
1607
proc = multiprocessing.Process(target = self.sub_process_main,
1608
args = (request,
1609
address))
1610
proc.start()
1611
return proc
1612
1613
1614
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1615
""" adds a pipe to the MixIn """
1616
def process_request(self, request, client_address):
1617
"""Overrides and wraps the original process_request().
1618
1619
This function creates a new pipe in self.pipe
1620
"""
1621
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1622
1623
proc = MultiprocessingMixIn.process_request(self, request,
1624
client_address)
1625
self.child_pipe.close()
1626
self.add_pipe(parent_pipe, proc)
1627
1628
def add_pipe(self, parent_pipe, proc):
1629
"""Dummy function; override as necessary"""
1630
raise NotImplementedError
1631
1632
1633
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1634
socketserver.TCPServer, object):
1635
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1636
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.
1637
518
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
1638
521
enabled: Boolean; whether this server is activated yet
1639
interface: None or a network interface name (string)
1640
use_ipv6: Boolean; to use IPv6 or not
1641
522
"""
1642
def __init__(self, server_address, RequestHandlerClass,
1643
interface=None, use_ipv6=True):
1644
self.interface = interface
1645
if use_ipv6:
1646
self.address_family = socket.AF_INET6
1647
socketserver.TCPServer.__init__(self, server_address,
1648
RequestHandlerClass)
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)
1649
533
def server_bind(self):
1650
534
"""This overrides the normal server_bind() function
1651
535
to bind to an interface if one was specified, and also NOT to
1652
536
bind to an address or port if they were not specified."""
1653
if self.interface is not None:
1654
if SO_BINDTODEVICE is None:
1655
logger.error("SO_BINDTODEVICE does not exist;"
1656
" cannot bind to interface %s",
1657
self.interface)
1658
else:
1659
try:
1660
self.socket.setsockopt(socket.SOL_SOCKET,
1661
SO_BINDTODEVICE,
1662
str(self.interface
1663
+ '\0'))
1664
except socket.error as error:
1665
if error[0] == errno.EPERM:
1666
logger.error("No permission to"
1667
" bind to interface %s",
1668
self.interface)
1669
elif error[0] == errno.ENOPROTOOPT:
1670
logger.error("SO_BINDTODEVICE not available;"
1671
" cannot bind to interface %s",
1672
self.interface)
1673
else:
1674
raise
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
1675
551
# Only bind(2) the socket if we really need to.
1676
552
if self.server_address[0] or self.server_address[1]:
1677
553
if not self.server_address[0]:
1678
if self.address_family == socket.AF_INET6:
1679
any_address = "::" # in6addr_any
1680
else:
1681
any_address = socket.INADDR_ANY
1682
self.server_address = (any_address,
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1683
556
self.server_address[1])
1684
557
elif not self.server_address[1]:
1685
558
self.server_address = (self.server_address[0],
1686
559
0)
1687
# if self.interface:
560
# if self.settings["interface"]:
1688
561
# self.server_address = (self.server_address[0],
1689
562
# 0, # port
1690
563
# 0, # flowinfo
1691
564
# if_nametoindex
1692
# (self.interface))
1693
return socketserver.TCPServer.server_bind(self)
1694
1695
1696
class MandosServer(IPv6_TCPServer):
1697
"""Mandos server.
1698
1699
Attributes:
1700
clients: set of Client objects
1701
gnutls_priority GnuTLS priority string
1702
use_dbus: Boolean; to emit D-Bus signals or not
1703
1704
Assumes a gobject.MainLoop event loop.
1705
"""
1706
def __init__(self, server_address, RequestHandlerClass,
1707
interface=None, use_ipv6=True, clients=None,
1708
gnutls_priority=None, use_dbus=True):
1709
self.enabled = False
1710
self.clients = clients
1711
if self.clients is None:
1712
self.clients = {}
1713
self.use_dbus = use_dbus
1714
self.gnutls_priority = gnutls_priority
1715
IPv6_TCPServer.__init__(self, server_address,
1716
RequestHandlerClass,
1717
interface = interface,
1718
use_ipv6 = use_ipv6)
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1719
568
def server_activate(self):
1720
569
if self.enabled:
1721
return socketserver.TCPServer.server_activate(self)
1722
570
return super(type(self), self).server_activate()
1723
571
def enable(self):
1724
572
self.enabled = True
1725
1726
def add_pipe(self, parent_pipe, proc):
1727
# Call "handle_ipc" for both data and EOF events
1728
gobject.io_add_watch(parent_pipe.fileno(),
1729
gobject.IO_IN | gobject.IO_HUP,
1730
functools.partial(self.handle_ipc,
1731
parent_pipe =
1732
parent_pipe,
1733
proc = proc))
1734
1735
def handle_ipc(self, source, condition, parent_pipe=None,
1736
proc = None, client_object=None):
1737
condition_names = {
1738
gobject.IO_IN: "IN", # There is data to read.
1739
gobject.IO_OUT: "OUT", # Data can be written (without
1740
# blocking).
1741
gobject.IO_PRI: "PRI", # There is urgent data to read.
1742
gobject.IO_ERR: "ERR", # Error condition.
1743
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1744
# broken, usually for pipes and
1745
# sockets).
1746
}
1747
conditions_string = ' | '.join(name
1748
for cond, name in
1749
condition_names.iteritems()
1750
if cond & condition)
1751
# error, or the other end of multiprocessing.Pipe has closed
1752
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1753
# Wait for other process to exit
1754
proc.join()
1755
return False
1756
1757
# Read a request from the child
1758
request = parent_pipe.recv()
1759
command = request[0]
1760
1761
if command == 'init':
1762
fpr = request[1]
1763
address = request[2]
1764
1765
for c in self.clients.itervalues():
1766
if c.fingerprint == fpr:
1767
client = c
1768
break
1769
else:
1770
logger.info("Client not found for fingerprint: %s, ad"
1771
"dress: %s", fpr, address)
1772
if self.use_dbus:
1773
# Emit D-Bus signal
1774
mandos_dbus_service.ClientNotFound(fpr,
1775
address[0])
1776
parent_pipe.send(False)
1777
return False
1778
1779
gobject.io_add_watch(parent_pipe.fileno(),
1780
gobject.IO_IN | gobject.IO_HUP,
1781
functools.partial(self.handle_ipc,
1782
parent_pipe =
1783
parent_pipe,
1784
proc = proc,
1785
client_object =
1786
client))
1787
parent_pipe.send(True)
1788
# remove the old hook in favor of the new above hook on
1789
# same fileno
1790
return False
1791
if command == 'funcall':
1792
funcname = request[1]
1793
args = request[2]
1794
kwargs = request[3]
1795
1796
parent_pipe.send(('data', getattr(client_object,
1797
funcname)(*args,
1798
**kwargs)))
1799
1800
if command == 'getattr':
1801
attrname = request[1]
1802
if callable(client_object.__getattribute__(attrname)):
1803
parent_pipe.send(('function',))
1804
else:
1805
parent_pipe.send(('data', client_object
1806
.__getattribute__(attrname)))
1807
1808
if command == 'setattr':
1809
attrname = request[1]
1810
value = request[2]
1811
setattr(client_object, attrname, value)
1812
1813
return True
1814
573
1815
574
1816
575
def string_to_delta(interval):
1817
576
"""Parse a string and return a datetime.timedelta
1818
577
1819
578
>>> string_to_delta('7d')
1820
579
datetime.timedelta(7)
1821
580
>>> string_to_delta('60s')
1824
583
datetime.timedelta(0, 3600)
1825
584
>>> string_to_delta('24h')
1826
585
datetime.timedelta(1)
1827
>>> string_to_delta('1w')
586
>>> string_to_delta(u'1w')
1828
587
datetime.timedelta(7)
1829
588
>>> string_to_delta('5m 30s')
1830
589
datetime.timedelta(0, 330)
1832
591
timevalue = datetime.timedelta(0)
1833
592
for s in interval.split():
1834
593
try:
1835
suffix = unicode(s[-1])
1836
value = int(s[:-1])
1837
if suffix == "d":
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
1838
597
delta = datetime.timedelta(value)
1839
elif suffix == "s":
598
elif suffix == u"s":
1840
599
delta = datetime.timedelta(0, value)
1841
elif suffix == "m":
600
elif suffix == u"m":
1842
601
delta = datetime.timedelta(0, 0, 0, 0, value)
1843
elif suffix == "h":
602
elif suffix == u"h":
1844
603
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1845
elif suffix == "w":
604
elif suffix == u"w":
1846
605
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1847
606
else:
1848
raise ValueError("Unknown suffix %r" % suffix)
1849
except (ValueError, IndexError) as e:
1850
raise ValueError(*(e.args))
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
1851
610
timevalue += delta
1852
611
return timevalue
1853
612
1854
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
1855
637
def if_nametoindex(interface):
1856
"""Call the C function if_nametoindex(), or equivalent
1857
1858
Note: This function cannot accept a unicode string."""
638
"""Call the C function if_nametoindex(), or equivalent"""
1859
639
global if_nametoindex
1860
640
try:
1861
if_nametoindex = (ctypes.cdll.LoadLibrary
1862
(ctypes.util.find_library("c"))
1863
.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
1864
645
except (OSError, AttributeError):
1865
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
1866
650
def if_nametoindex(interface):
1867
651
"Get an interface index the hard way, i.e. using fcntl()"
1868
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1869
with contextlib.closing(socket.socket()) as s:
1870
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1871
struct.pack(str("16s16x"),
1872
interface))
1873
interface_index = struct.unpack(str("I"),
1874
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]
1875
658
return interface_index
1876
659
return if_nametoindex(interface)
1877
660
1878
661
1879
662
def daemon(nochdir = False, noclose = False):
1880
663
"""See daemon(3). Standard BSD Unix function.
1881
1882
664
This should really exist as os.daemon, but it doesn't (yet)."""
1883
665
if os.fork():
1884
666
sys.exit()
1892
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1893
675
if not stat.S_ISCHR(os.fstat(null).st_mode):
1894
676
raise OSError(errno.ENODEV,
1895
"%s not a character device"
1896
% os.path.devnull)
677
"/dev/null not a character device")
1897
678
os.dup2(null, sys.stdin.fileno())
1898
679
os.dup2(null, sys.stdout.fileno())
1899
680
os.dup2(null, sys.stderr.fileno())
1902
683
1903
684
1904
685
def main():
1905
1906
##################################################################
1907
# Parsing of options, both command line and config file
1908
1909
parser = argparse.ArgumentParser()
1910
parser.add_argument("-v", "--version", action="version",
1911
version = "%%(prog)s %s" % version,
1912
help="show version number and exit")
1913
parser.add_argument("-i", "--interface", metavar="IF",
1914
help="Bind to interface IF")
1915
parser.add_argument("-a", "--address",
1916
help="Address to listen for requests on")
1917
parser.add_argument("-p", "--port", type=int,
1918
help="Port number to receive requests on")
1919
parser.add_argument("--check", action="store_true",
1920
help="Run self-test")
1921
parser.add_argument("--debug", action="store_true",
1922
help="Debug mode; run in foreground and log"
1923
" to terminal")
1924
parser.add_argument("--debuglevel", metavar="LEVEL",
1925
help="Debug level for stdout output")
1926
parser.add_argument("--priority", help="GnuTLS"
1927
" priority string (see GnuTLS documentation)")
1928
parser.add_argument("--servicename",
1929
metavar="NAME", help="Zeroconf service name")
1930
parser.add_argument("--configdir",
1931
default="/etc/mandos", metavar="DIR",
1932
help="Directory to search for configuration"
1933
" files")
1934
parser.add_argument("--no-dbus", action="store_false",
1935
dest="use_dbus", help="Do not provide D-Bus"
1936
" system bus interface")
1937
parser.add_argument("--no-ipv6", action="store_false",
1938
dest="use_ipv6", help="Do not use IPv6")
1939
parser.add_argument("--no-restore", action="store_false",
1940
dest="restore", help="Do not restore stored state",
1941
default=True)
1942
1943
options = parser.parse_args()
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()
1944
710
1945
711
if options.check:
1946
712
import doctest
1955
721
"priority":
1956
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1957
723
"servicename": "Mandos",
1958
"use_dbus": "True",
1959
"use_ipv6": "True",
1960
"debuglevel": "",
1961
724
}
1962
725
1963
726
# Parse config file for server-global settings
1964
server_config = configparser.SafeConfigParser(server_defaults)
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1965
728
del server_defaults
1966
server_config.read(os.path.join(options.configdir,
1967
"mandos.conf"))
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1968
730
# Convert the SafeConfigParser object to a dict
1969
731
server_settings = server_config.defaults()
1970
# Use the appropriate methods on the non-string config options
1971
for option in ("debug", "use_dbus", "use_ipv6"):
1972
server_settings[option] = server_config.getboolean("DEFAULT",
1973
option)
1974
if server_settings["port"]:
1975
server_settings["port"] = server_config.getint("DEFAULT",
1976
"port")
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1977
735
del server_config
1978
736
1979
737
# Override the settings from the config file with command line
1980
738
# options, if set.
1981
739
for option in ("interface", "address", "port", "debug",
1982
"priority", "servicename", "configdir",
1983
"use_dbus", "use_ipv6", "debuglevel", "restore"):
740
"priority", "servicename", "configdir"):
1984
741
value = getattr(options, option)
1985
742
if value is not None:
1986
743
server_settings[option] = value
1987
744
del options
1988
# Force all strings to be unicode
1989
for option in server_settings.keys():
1990
if type(server_settings[option]) is str:
1991
server_settings[option] = unicode(server_settings[option])
1992
745
# Now we have our good server settings in "server_settings"
1993
746
1994
##################################################################
1995
1996
# For convenience
1997
747
debug = server_settings["debug"]
1998
debuglevel = server_settings["debuglevel"]
1999
use_dbus = server_settings["use_dbus"]
2000
use_ipv6 = server_settings["use_ipv6"]
2001
748
2002
if debug:
2003
initlogger(logging.DEBUG)
2004
else:
2005
if not debuglevel:
2006
initlogger()
2007
else:
2008
level = getattr(logging, debuglevel.upper())
2009
initlogger(level)
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
2010
752
2011
753
if server_settings["servicename"] != "Mandos":
2012
syslogger.setFormatter(logging.Formatter
2013
('Mandos (%s) [%%(process)d]:'
2014
' %%(levelname)s: %%(message)s'
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
2015
757
% server_settings["servicename"]))
2016
758
2017
759
# Parse config file with clients
2018
client_defaults = { "timeout": "5m",
2019
"extended_timeout": "15m",
2020
"interval": "2m",
2021
"checker": "fping -q -- %%(host)s",
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
2022
763
"host": "",
2023
"approval_delay": "0s",
2024
"approval_duration": "1s",
2025
764
}
2026
client_config = configparser.SafeConfigParser(client_defaults)
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
2027
766
client_config.read(os.path.join(server_settings["configdir"],
2028
767
"clients.conf"))
2029
768
2030
global mandos_dbus_service
2031
mandos_dbus_service = None
2032
2033
tcp_server = MandosServer((server_settings["address"],
2034
server_settings["port"]),
2035
ClientHandler,
2036
interface=(server_settings["interface"]
2037
or None),
2038
use_ipv6=use_ipv6,
2039
gnutls_priority=
2040
server_settings["priority"],
2041
use_dbus=use_dbus)
2042
if not debug:
2043
pidfilename = "/var/run/mandos.pid"
2044
try:
2045
pidfile = open(pidfilename, "w")
2046
except IOError:
2047
logger.error("Could not open file %r", pidfilename)
2048
2049
try:
2050
uid = pwd.getpwnam("_mandos").pw_uid
2051
gid = pwd.getpwnam("_mandos").pw_gid
2052
except KeyError:
2053
try:
2054
uid = pwd.getpwnam("mandos").pw_uid
2055
gid = pwd.getpwnam("mandos").pw_gid
2056
except KeyError:
2057
try:
2058
uid = pwd.getpwnam("nobody").pw_uid
2059
gid = pwd.getpwnam("nobody").pw_gid
2060
except KeyError:
2061
uid = 65534
2062
gid = 65534
2063
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)
2064
799
os.setgid(gid)
2065
os.setuid(uid)
2066
except OSError as error:
800
except OSError, error:
2067
801
if error[0] != errno.EPERM:
2068
802
raise error
2069
803
2070
if debug:
2071
# Enable all possible GnuTLS debugging
2072
2073
# "Use a log level over 10 to enable all debugging options."
2074
# - GnuTLS manual
2075
gnutls.library.functions.gnutls_global_set_log_level(11)
2076
2077
@gnutls.library.types.gnutls_log_func
2078
def debug_gnutls(level, string):
2079
logger.debug("GnuTLS: %s", string[:-1])
2080
2081
(gnutls.library.functions
2082
.gnutls_global_set_log_function(debug_gnutls))
2083
2084
# Redirect stdin so all checkers get /dev/null
2085
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2086
os.dup2(null, sys.stdin.fileno())
2087
if null > 2:
2088
os.close(null)
2089
else:
2090
# No console logging
2091
logger.removeHandler(console)
2092
2093
# Need to fork before connecting to D-Bus
2094
if not debug:
2095
# Close all input and output, do double fork, etc.
2096
daemon()
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"])
2097
810
2098
811
global main_loop
812
global bus
813
global server
2099
814
# From the Avahi example code
2100
815
DBusGMainLoop(set_as_default=True )
2101
816
main_loop = gobject.MainLoop()
2102
817
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
2103
821
# End of Avahi example code
2104
if use_dbus:
2105
try:
2106
bus_name = dbus.service.BusName("se.recompile.Mandos",
2107
bus, do_not_queue=True)
2108
old_bus_name = (dbus.service.BusName
2109
("se.bsnet.fukt.Mandos", bus,
2110
do_not_queue=True))
2111
except dbus.exceptions.NameExistsException as e:
2112
logger.error(unicode(e) + ", disabling D-Bus")
2113
use_dbus = False
2114
server_settings["use_dbus"] = False
2115
tcp_server.use_dbus = False
2116
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2117
service = AvahiServiceToSyslog(name =
2118
server_settings["servicename"],
2119
servicetype = "_mandos._tcp",
2120
protocol = protocol, bus = bus)
2121
if server_settings["interface"]:
2122
service.interface = (if_nametoindex
2123
(str(server_settings["interface"])))
2124
2125
global multiprocessing_manager
2126
multiprocessing_manager = multiprocessing.Manager()
2127
2128
client_class = Client
2129
if use_dbus:
2130
client_class = functools.partial(ClientDBusTransitional,
2131
bus = bus)
2132
2133
special_settings = {
2134
# Some settings need to be accessd by special methods;
2135
# booleans need .getboolean(), etc. Here is a list of them:
2136
"approved_by_default":
2137
lambda section:
2138
client_config.getboolean(section, "approved_by_default"),
2139
}
2140
# Construct a new dict of client settings of this form:
2141
# { client_name: {setting_name: value, ...}, ...}
2142
# with exceptions for any special settings as defined above
2143
client_settings = dict((clientname,
2144
dict((setting,
2145
(value if setting not in special_settings
2146
else special_settings[setting](clientname)))
2147
for setting, value in client_config.items(clientname)))
2148
for clientname in client_config.sections())
2149
2150
old_client_settings = {}
2151
clients_data = []
2152
2153
# Get client data and settings from last running state.
2154
if server_settings["restore"]:
2155
try:
2156
with open(stored_state_path, "rb") as stored_state:
2157
clients_data, old_client_settings = pickle.load(stored_state)
2158
os.remove(stored_state_path)
2159
except IOError as e:
2160
logger.warning("Could not load persistant state: {0}".format(e))
2161
if e.errno != errno.ENOENT:
2162
raise
2163
2164
for client in clients_data:
2165
client_name = client["name"]
2166
2167
# Decide which value to use after restoring saved state.
2168
# We have three different values: Old config file,
2169
# new config file, and saved state.
2170
# New config value takes precedence if it differs from old
2171
# config value, otherwise use saved state.
2172
for name, value in client_settings[client_name].items():
2173
try:
2174
# For each value in new config, check if it differs
2175
# from the old config value (Except for the "secret"
2176
# attribute)
2177
if name != "secret" and value != old_client_settings[client_name][name]:
2178
setattr(client, name, value)
2179
except KeyError:
2180
pass
2181
2182
# Clients who has passed its expire date, can still be enabled if its
2183
# last checker was sucessful. Clients who checkers failed before we
2184
# stored it state is asumed to had failed checker during downtime.
2185
if client["enabled"] and client["last_checked_ok"]:
2186
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2187
> client["interval"]):
2188
if client["last_checker_status"] != 0:
2189
client["enabled"] = False
2190
else:
2191
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2192
2193
client["changedstate"] = (multiprocessing_manager
2194
.Condition(multiprocessing_manager
2195
.Lock()))
2196
if use_dbus:
2197
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2198
tcp_server.clients[client_name] = new_client
2199
new_client.bus = bus
2200
for name, value in client.iteritems():
2201
setattr(new_client, name, value)
2202
client_object_name = unicode(client_name).translate(
2203
{ord("."): ord("_"),
2204
ord("-"): ord("_")})
2205
new_client.dbus_object_path = (dbus.ObjectPath
2206
("/clients/" + client_object_name))
2207
DBusObjectWithProperties.__init__(new_client,
2208
new_client.bus,
2209
new_client.dbus_object_path)
2210
else:
2211
tcp_server.clients[client_name] = Client.__new__(Client)
2212
for name, value in client.iteritems():
2213
setattr(tcp_server.clients[client_name], name, value)
2214
2215
tcp_server.clients[client_name].decrypt_secret(
2216
client_settings[client_name]["secret"])
2217
2218
# Create/remove clients based on new changes made to config
2219
for clientname in set(old_client_settings) - set(client_settings):
2220
del tcp_server.clients[clientname]
2221
for clientname in set(client_settings) - set(old_client_settings):
2222
tcp_server.clients[clientname] = (client_class(name = clientname,
2223
config =
2224
client_settings
2225
[clientname]))
2226
2227
2228
if not tcp_server.clients:
2229
logger.warning("No clients defined")
2230
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)
837
838
if debug:
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
842
if null > 2:
843
os.close(null)
844
else:
845
# No console logging
846
logger.removeHandler(console)
847
# Close all input and output, do double fork, etc.
848
daemon()
849
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
2231
879
if not debug:
2232
try:
2233
with pidfile:
2234
pid = os.getpid()
2235
pidfile.write(str(pid) + "\n".encode("utf-8"))
2236
del pidfile
2237
except IOError:
2238
logger.error("Could not write to file %r with PID %d",
2239
pidfilename, pid)
2240
except NameError:
2241
# "pidfile" was never created
2242
pass
2243
del pidfilename
2244
2245
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
2246
2247
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2248
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2249
883
2250
if use_dbus:
2251
class MandosDBusService(dbus.service.Object):
2252
"""A D-Bus proxy object"""
2253
def __init__(self):
2254
dbus.service.Object.__init__(self, bus, "/")
2255
_interface = "se.recompile.Mandos"
2256
2257
@dbus.service.signal(_interface, signature="o")
2258
def ClientAdded(self, objpath):
2259
"D-Bus signal"
2260
pass
2261
2262
@dbus.service.signal(_interface, signature="ss")
2263
def ClientNotFound(self, fingerprint, address):
2264
"D-Bus signal"
2265
pass
2266
2267
@dbus.service.signal(_interface, signature="os")
2268
def ClientRemoved(self, objpath, name):
2269
"D-Bus signal"
2270
pass
2271
2272
@dbus.service.method(_interface, out_signature="ao")
2273
def GetAllClients(self):
2274
"D-Bus method"
2275
return dbus.Array(c.dbus_object_path
2276
for c in
2277
tcp_server.clients.itervalues())
2278
2279
@dbus.service.method(_interface,
2280
out_signature="a{oa{sv}}")
2281
def GetAllClientsWithProperties(self):
2282
"D-Bus method"
2283
return dbus.Dictionary(
2284
((c.dbus_object_path, c.GetAll(""))
2285
for c in tcp_server.clients.itervalues()),
2286
signature="oa{sv}")
2287
2288
@dbus.service.method(_interface, in_signature="o")
2289
def RemoveClient(self, object_path):
2290
"D-Bus method"
2291
for c in tcp_server.clients.itervalues():
2292
if c.dbus_object_path == object_path:
2293
del tcp_server.clients[c.name]
2294
c.remove_from_connection()
2295
# Don't signal anything except ClientRemoved
2296
c.disable(quiet=True)
2297
# Emit D-Bus signal
2298
self.ClientRemoved(object_path, c.name)
2299
return
2300
raise KeyError(object_path)
2301
2302
del _interface
2303
2304
class MandosDBusServiceTransitional(MandosDBusService):
2305
__metaclass__ = AlternateDBusNamesMetaclass
2306
mandos_dbus_service = MandosDBusServiceTransitional()
2307
2308
def cleanup():
2309
"Cleanup function; run on exit"
2310
service.cleanup()
2311
2312
multiprocessing.active_children()
2313
if not (tcp_server.clients or client_settings):
2314
return
2315
2316
# Store client before exiting. Secrets are encrypted with key based
2317
# on what config file has. If config file is removed/edited, old
2318
# secret will thus be unrecovable.
2319
clients = []
2320
for client in tcp_server.clients.itervalues():
2321
client.encrypt_secret(client_settings[client.name]["secret"])
2322
2323
client_dict = {}
2324
2325
# A list of attributes that will not be stored when shuting down.
2326
exclude = set(("bus", "changedstate", "secret"))
2327
for name, typ in inspect.getmembers(dbus.service.Object):
2328
exclude.add(name)
2329
2330
client_dict["encrypted_secret"] = client.encrypted_secret
2331
for attr in client.client_structure:
2332
if attr not in exclude:
2333
client_dict[attr] = getattr(client, attr)
2334
2335
clients.append(client_dict)
2336
del client_settings[client.name]["secret"]
2337
2338
try:
2339
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2340
pickle.dump((clients, client_settings), stored_state)
2341
except IOError as e:
2342
logger.warning("Could not save persistant state: {0}".format(e))
2343
if e.errno != errno.ENOENT:
2344
raise
2345
2346
# Delete all clients, and settings from config
2347
while tcp_server.clients:
2348
name, client = tcp_server.clients.popitem()
2349
if use_dbus:
2350
client.remove_from_connection()
2351
# Don't signal anything except ClientRemoved
2352
client.disable(quiet=True)
2353
if use_dbus:
2354
# Emit D-Bus signal
2355
mandos_dbus_service.ClientRemoved(client
2356
.dbus_object_path,
2357
client.name)
2358
client_settings.clear()
2359
2360
atexit.register(cleanup)
2361
2362
for client in tcp_server.clients.itervalues():
2363
if use_dbus:
2364
# Emit D-Bus signal
2365
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2366
# Need to initiate checking of clients
2367
if client.enabled:
2368
client.init_checker()
2369
884
for client in clients:
885
client.start()
2370
886
2371
887
tcp_server.enable()
2372
888
tcp_server.server_activate()
2373
889
2374
890
# Find out what port we got
2375
891
service.port = tcp_server.socket.getsockname()[1]
2376
if use_ipv6:
2377
logger.info("Now listening on address %r, port %d,"
2378
" flowinfo %d, scope_id %d"
2379
% tcp_server.socket.getsockname())
2380
else: # IPv4
2381
logger.info("Now listening on address %r, port %d"
2382
% tcp_server.socket.getsockname())
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
2383
894
2384
895
#service.interface = tcp_server.socket.getsockname()[3]
2385
896
2386
897
try:
2387
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
2388
900
try:
2389
service.activate()
2390
except dbus.exceptions.DBusException as error:
2391
logger.critical("DBusException: %s", error)
2392
cleanup()
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
2393
904
sys.exit(1)
2394
905
# End of Avahi example code
2395
906
2396
907
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2397
908
lambda *args, **kwargs:
2398
(tcp_server.handle_request
2399
(*args[2:], **kwargs) or True))
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2400
911
2401
logger.debug("Starting main loop")
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
2402
914
main_loop.run()
2403
except AvahiError as error:
2404
logger.critical("AvahiError: %s", error)
2405
cleanup()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2406
917
sys.exit(1)
2407
918
except KeyboardInterrupt:
2408
919
if debug:
2409
print("", file=sys.stderr)
2410
logger.debug("Server received KeyboardInterrupt")
2411
logger.debug("Server exiting")
2412
# Must run before the D-Bus bus name gets deregistered
2413
cleanup()
2414
920
print
2415
921
2416
922
if __name__ == '__main__':
2417
923
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0