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- Committer: Björn Påhlsson
- Date: 2011-11-09 17:16:03 UTC
- mfrom: (518.1.1 mandos-persistent)
- Revision ID: belorn@fukt.bsnet.se-20111109171603-srz21uoclpldp5ve
merge persistent state
- files added:
- 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" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
import SocketServer
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
44
45
import gnutls.library.functions
45
46
import gnutls.library.constants
46
47
import gnutls.library.types
47
import ConfigParser
48
import ConfigParser as configparser
48
49
import sys
49
50
import re
50
51
import os
51
52
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
from contextlib import closing
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
60
67
61
68
import dbus
62
69
import dbus.service
65
72
from dbus.mainloop.glib import DBusGMainLoop
66
73
import ctypes
67
74
import ctypes.util
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
75
import xml.dom.minidom
76
import inspect
77
import Crypto.Cipher.AES
78
79
try:
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
except AttributeError:
82
try:
83
from IN import SO_BINDTODEVICE
84
except ImportError:
85
SO_BINDTODEVICE = None
86
87
88
version = "1.4.1"
89
90
logger = logging.getLogger()
91
stored_state_path = "/var/lib/mandos/clients.pickle"
92
72
93
syslogger = (logging.handlers.SysLogHandler
73
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
95
address = str("/dev/log")))
75
96
syslogger.setFormatter(logging.Formatter
76
97
('Mandos [%(process)d]: %(levelname)s:'
77
98
' %(message)s'))
78
99
logger.addHandler(syslogger)
79
100
80
101
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
103
' [%(process)d]:'
104
' %(levelname)s:'
105
' %(message)s'))
83
106
logger.addHandler(console)
84
107
108
85
109
class AvahiError(Exception):
86
110
def __init__(self, value, *args, **kwargs):
87
111
self.value = value
98
122
99
123
class AvahiService(object):
100
124
"""An Avahi (Zeroconf) service.
125
101
126
Attributes:
102
127
interface: integer; avahi.IF_UNSPEC or an interface index.
103
128
Used to optionally bind to the specified interface.
111
136
max_renames: integer; maximum number of renames
112
137
rename_count: integer; counter so we only rename after collisions
113
138
a sensible number of times
139
group: D-Bus Entry Group
140
server: D-Bus Server
141
bus: dbus.SystemBus()
114
142
"""
115
143
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
144
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768):
145
domain = "", host = "", max_renames = 32768,
146
protocol = avahi.PROTO_UNSPEC, bus = None):
118
147
self.interface = interface
119
148
self.name = name
120
149
self.type = servicetype
124
153
self.host = host
125
154
self.rename_count = 0
126
155
self.max_renames = max_renames
156
self.protocol = protocol
157
self.group = None # our entry group
158
self.server = None
159
self.bus = bus
160
self.entry_group_state_changed_match = None
127
161
def rename(self):
128
162
"""Derived from the Avahi example code"""
129
163
if self.rename_count >= self.max_renames:
130
logger.critical(u"No suitable Zeroconf service name found"
131
u" after %i retries, exiting.",
164
logger.critical("No suitable Zeroconf service name found"
165
" after %i retries, exiting.",
132
166
self.rename_count)
133
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
135
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
137
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
167
raise AvahiServiceError("Too many renames")
168
self.name = unicode(self.server
169
.GetAlternativeServiceName(self.name))
170
logger.info("Changing Zeroconf service name to %r ...",
171
self.name)
140
172
self.remove()
141
self.add()
173
try:
174
self.add()
175
except dbus.exceptions.DBusException as error:
176
logger.critical("DBusException: %s", error)
177
self.cleanup()
178
os._exit(1)
142
179
self.rename_count += 1
143
180
def remove(self):
144
181
"""Derived from the Avahi example code"""
145
if group is not None:
146
group.Reset()
182
if self.entry_group_state_changed_match is not None:
183
self.entry_group_state_changed_match.remove()
184
self.entry_group_state_changed_match = None
185
if self.group is not None:
186
self.group.Reset()
147
187
def add(self):
148
188
"""Derived from the Avahi example code"""
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
152
(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
entry_group_state_changed)
157
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
171
# End of Avahi example code
172
173
174
def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
179
class Client(dbus.service.Object):
189
self.remove()
190
if self.group is None:
191
self.group = dbus.Interface(
192
self.bus.get_object(avahi.DBUS_NAME,
193
self.server.EntryGroupNew()),
194
avahi.DBUS_INTERFACE_ENTRY_GROUP)
195
self.entry_group_state_changed_match = (
196
self.group.connect_to_signal(
197
'StateChanged', self.entry_group_state_changed))
198
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
199
self.name, self.type)
200
self.group.AddService(
201
self.interface,
202
self.protocol,
203
dbus.UInt32(0), # flags
204
self.name, self.type,
205
self.domain, self.host,
206
dbus.UInt16(self.port),
207
avahi.string_array_to_txt_array(self.TXT))
208
self.group.Commit()
209
def entry_group_state_changed(self, state, error):
210
"""Derived from the Avahi example code"""
211
logger.debug("Avahi entry group state change: %i", state)
212
213
if state == avahi.ENTRY_GROUP_ESTABLISHED:
214
logger.debug("Zeroconf service established.")
215
elif state == avahi.ENTRY_GROUP_COLLISION:
216
logger.info("Zeroconf service name collision.")
217
self.rename()
218
elif state == avahi.ENTRY_GROUP_FAILURE:
219
logger.critical("Avahi: Error in group state changed %s",
220
unicode(error))
221
raise AvahiGroupError("State changed: %s"
222
% unicode(error))
223
def cleanup(self):
224
"""Derived from the Avahi example code"""
225
if self.group is not None:
226
try:
227
self.group.Free()
228
except (dbus.exceptions.UnknownMethodException,
229
dbus.exceptions.DBusException) as e:
230
pass
231
self.group = None
232
self.remove()
233
def server_state_changed(self, state, error=None):
234
"""Derived from the Avahi example code"""
235
logger.debug("Avahi server state change: %i", state)
236
bad_states = { avahi.SERVER_INVALID:
237
"Zeroconf server invalid",
238
avahi.SERVER_REGISTERING: None,
239
avahi.SERVER_COLLISION:
240
"Zeroconf server name collision",
241
avahi.SERVER_FAILURE:
242
"Zeroconf server failure" }
243
if state in bad_states:
244
if bad_states[state] is not None:
245
if error is None:
246
logger.error(bad_states[state])
247
else:
248
logger.error(bad_states[state] + ": %r", error)
249
self.cleanup()
250
elif state == avahi.SERVER_RUNNING:
251
self.add()
252
else:
253
if error is None:
254
logger.debug("Unknown state: %r", state)
255
else:
256
logger.debug("Unknown state: %r: %r", state, error)
257
def activate(self):
258
"""Derived from the Avahi example code"""
259
if self.server is None:
260
self.server = dbus.Interface(
261
self.bus.get_object(avahi.DBUS_NAME,
262
avahi.DBUS_PATH_SERVER,
263
follow_name_owner_changes=True),
264
avahi.DBUS_INTERFACE_SERVER)
265
self.server.connect_to_signal("StateChanged",
266
self.server_state_changed)
267
self.server_state_changed(self.server.GetState())
268
269
class AvahiServiceToSyslog(AvahiService):
270
def rename(self):
271
"""Add the new name to the syslog messages"""
272
ret = AvahiService.rename(self)
273
syslogger.setFormatter(logging.Formatter
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
276
% self.name))
277
return ret
278
279
def _timedelta_to_milliseconds(td):
280
"Convert a datetime.timedelta() to milliseconds"
281
return ((td.days * 24 * 60 * 60 * 1000)
282
+ (td.seconds * 1000)
283
+ (td.microseconds // 1000))
284
285
class Client(object):
180
286
"""A representation of a client host served by this server.
287
181
288
Attributes:
182
name: string; from the config file, used in log messages and
183
D-Bus identifiers
289
_approved: bool(); 'None' if not yet approved/disapproved
290
approval_delay: datetime.timedelta(); Time to wait for approval
291
approval_duration: datetime.timedelta(); Duration of one approval
292
checker: subprocess.Popen(); a running checker process used
293
to see if the client lives.
294
'None' if no process is running.
295
checker_callback_tag: a gobject event source tag, or None
296
checker_command: string; External command which is run to check
297
if client lives. %() expansions are done at
298
runtime with vars(self) as dict, so that for
299
instance %(name)s can be used in the command.
300
checker_initiator_tag: a gobject event source tag, or None
301
created: datetime.datetime(); (UTC) object creation
302
client_structure: Object describing what attributes a client has
303
and is used for storing the client at exit
304
current_checker_command: string; current running checker_command
305
disable_initiator_tag: a gobject event source tag, or None
306
enabled: bool()
184
307
fingerprint: string (40 or 32 hexadecimal digits); used to
185
308
uniquely identify the client
186
secret: bytestring; sent verbatim (over TLS) to client
187
309
host: string; available for use by the checker command
188
created: datetime.datetime(); (UTC) object creation
310
interval: datetime.timedelta(); How often to start a new checker
311
last_approval_request: datetime.datetime(); (UTC) or None
312
last_checked_ok: datetime.datetime(); (UTC) or None
313
last_checker_status: integer between 0 and 255 reflecting exit status
314
of last checker. -1 reflect crashed checker,
315
or None.
189
316
last_enabled: datetime.datetime(); (UTC)
190
enabled: bool()
191
last_checked_ok: datetime.datetime(); (UTC) or None
317
name: string; from the config file, used in log messages and
318
D-Bus identifiers
319
secret: bytestring; sent verbatim (over TLS) to client
192
320
timeout: datetime.timedelta(); How long from last_checked_ok
193
until this client is invalid
194
interval: datetime.timedelta(); How often to start a new checker
195
disable_hook: If set, called by disable() as disable_hook(self)
196
checker: subprocess.Popen(); a running checker process used
197
to see if the client lives.
198
'None' if no process is running.
199
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
201
checker_callback_tag: - '' -
202
checker_command: string; External command which is run to check if
203
client lives. %() expansions are done at
204
runtime with vars(self) as dict, so that for
205
instance %(name)s can be used in the command.
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
321
until this client is disabled
322
extended_timeout: extra long timeout when password has been sent
323
runtime_expansions: Allowed attributes for runtime expansion.
324
expires: datetime.datetime(); time (UTC) when a client will be
325
disabled, or None
208
326
"""
327
328
runtime_expansions = ("approval_delay", "approval_duration",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
331
"last_enabled", "name", "timeout")
332
209
333
def timeout_milliseconds(self):
210
334
"Return the 'timeout' attribute in milliseconds"
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
335
return _timedelta_to_milliseconds(self.timeout)
336
337
def extended_timeout_milliseconds(self):
338
"Return the 'extended_timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.extended_timeout)
214
340
215
341
def interval_milliseconds(self):
216
342
"Return the 'interval' attribute in milliseconds"
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
220
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
343
return _timedelta_to_milliseconds(self.interval)
344
345
def approval_delay_milliseconds(self):
346
return _timedelta_to_milliseconds(self.approval_delay)
347
348
def __init__(self, name = None, config=None):
223
349
"""Note: the 'checker' key in 'config' sets the
224
350
'checker_command' attribute and *not* the 'checker'
225
351
attribute."""
226
352
self.name = name
227
353
if config is None:
228
354
config = {}
229
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
355
logger.debug("Creating client %r", self.name)
231
356
# Uppercase and remove spaces from fingerprint for later
232
357
# comparison purposes with return value from the fingerprint()
233
358
# function
234
359
self.fingerprint = (config["fingerprint"].upper()
235
.replace(u" ", u""))
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
360
.replace(" ", ""))
361
logger.debug(" Fingerprint: %s", self.fingerprint)
237
362
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
363
self.secret = config["secret"].decode("base64")
239
364
elif "secfile" in config:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
365
with open(os.path.expanduser(os.path.expandvars
366
(config["secfile"])),
367
"rb") as secfile:
243
368
self.secret = secfile.read()
244
369
else:
245
raise TypeError(u"No secret or secfile for client %s"
370
raise TypeError("No secret or secfile for client %s"
246
371
% self.name)
247
372
self.host = config.get("host", "")
248
373
self.created = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
374
self.enabled = True
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
251
377
self.last_checked_ok = None
378
self.last_checker_status = None
252
379
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
253
382
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
255
383
self.checker = None
256
384
self.checker_initiator_tag = None
257
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
258
387
self.checker_callback_tag = None
259
388
self.checker_command = config["checker"]
260
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
389
self.current_checker_command = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
392
True)
393
self.approvals_pending = 0
394
self.approval_delay = string_to_delta(
395
config["approval_delay"])
396
self.approval_duration = string_to_delta(
397
config["approval_duration"])
398
self.changedstate = (multiprocessing_manager
399
.Condition(multiprocessing_manager
400
.Lock()))
401
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
402
self.client_structure.append("client_structure")
403
404
405
for name, t in inspect.getmembers(type(self),
406
lambda obj: isinstance(obj, property)):
407
if not name.startswith("_"):
408
self.client_structure.append(name)
409
410
# Send notice to process children that client state has changed
411
def send_changedstate(self):
412
with self.changedstate:
413
self.changedstate.notify_all()
270
414
271
415
def enable(self):
272
416
"""Start this client's checker and timeout hooks"""
417
if getattr(self, "enabled", False):
418
# Already enabled
419
return
420
self.send_changedstate()
421
self.expires = datetime.datetime.utcnow() + self.timeout
422
self.enabled = True
273
423
self.last_enabled = datetime.datetime.utcnow()
274
# Schedule a new checker to be started an 'interval' from now,
275
# and every interval from then on.
276
self.checker_initiator_tag = (gobject.timeout_add
277
(self.interval_milliseconds(),
278
self.start_checker))
279
# Also start a new checker *right now*.
280
self.start_checker()
281
# Schedule a disable() when 'timeout' has passed
282
self.disable_initiator_tag = (gobject.timeout_add
283
(self.timeout_milliseconds(),
284
self.disable))
285
self.enabled = True
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
424
self.init_checker()
293
425
294
def disable(self):
426
def disable(self, quiet=True):
295
427
"""Disable this client."""
296
428
if not getattr(self, "enabled", False):
297
429
return False
298
logger.info(u"Disabling client %s", self.name)
430
if not quiet:
431
self.send_changedstate()
432
if not quiet:
433
logger.info("Disabling client %s", self.name)
299
434
if getattr(self, "disable_initiator_tag", False):
300
435
gobject.source_remove(self.disable_initiator_tag)
301
436
self.disable_initiator_tag = None
437
self.expires = None
302
438
if getattr(self, "checker_initiator_tag", False):
303
439
gobject.source_remove(self.checker_initiator_tag)
304
440
self.checker_initiator_tag = None
305
441
self.stop_checker()
306
if self.disable_hook:
307
self.disable_hook(self)
308
442
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
313
443
# Do not run this again if called by a gobject.timeout_add
314
444
return False
315
445
316
446
def __del__(self):
317
self.disable_hook = None
318
447
self.disable()
319
448
449
def init_checker(self):
450
# Schedule a new checker to be started an 'interval' from now,
451
# and every interval from then on.
452
self.checker_initiator_tag = (gobject.timeout_add
453
(self.interval_milliseconds(),
454
self.start_checker))
455
# Schedule a disable() when 'timeout' has passed
456
self.disable_initiator_tag = (gobject.timeout_add
457
(self.timeout_milliseconds(),
458
self.disable))
459
# Also start a new checker *right now*.
460
self.start_checker()
461
462
320
463
def checker_callback(self, pid, condition, command):
321
464
"""The checker has completed, so take appropriate actions."""
322
465
self.checker_callback_tag = None
323
466
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
328
467
if os.WIFEXITED(condition):
329
exitstatus = os.WEXITSTATUS(condition)
330
if exitstatus == 0:
331
logger.info(u"Checker for %(name)s succeeded",
468
self.last_checker_status = os.WEXITSTATUS(condition)
469
if self.last_checker_status == 0:
470
logger.info("Checker for %(name)s succeeded",
332
471
vars(self))
333
472
self.checked_ok()
334
473
else:
335
logger.info(u"Checker for %(name)s failed",
474
logger.info("Checker for %(name)s failed",
336
475
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
342
476
else:
343
logger.warning(u"Checker for %(name)s crashed?",
477
self.last_checker_status = -1
478
logger.warning("Checker for %(name)s crashed?",
344
479
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
350
480
351
def checked_ok(self):
481
def checked_ok(self, timeout=None):
352
482
"""Bump up the timeout for this client.
483
353
484
This should only be called when the client has been seen,
354
485
alive and well.
355
486
"""
487
if timeout is None:
488
timeout = self.timeout
356
489
self.last_checked_ok = datetime.datetime.utcnow()
357
gobject.source_remove(self.disable_initiator_tag)
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
490
if self.disable_initiator_tag is not None:
491
gobject.source_remove(self.disable_initiator_tag)
492
if getattr(self, "enabled", False):
493
self.disable_initiator_tag = (gobject.timeout_add
494
(_timedelta_to_milliseconds
495
(timeout), self.disable))
496
self.expires = datetime.datetime.utcnow() + timeout
497
498
def need_approval(self):
499
self.last_approval_request = datetime.datetime.utcnow()
367
500
368
501
def start_checker(self):
369
502
"""Start a new checker subprocess if one is not running.
503
370
504
If a checker already exists, leave it running and do
371
505
nothing."""
372
506
# The reason for not killing a running checker is that if we
375
509
# client would inevitably timeout, since no checker would get
376
510
# a chance to run to completion. If we instead leave running
377
511
# checkers alone, the checker would have to take more time
378
# than 'timeout' for the client to be declared invalid, which
379
# is as it should be.
512
# than 'timeout' for the client to be disabled, which is as it
513
# should be.
514
515
# If a checker exists, make sure it is not a zombie
516
try:
517
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
518
except (AttributeError, OSError) as error:
519
if (isinstance(error, OSError)
520
and error.errno != errno.ECHILD):
521
raise error
522
else:
523
if pid:
524
logger.warning("Checker was a zombie")
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status,
527
self.current_checker_command)
528
# Start a new checker if needed
380
529
if self.checker is None:
381
530
try:
382
531
# In case checker_command has exactly one % operator
383
532
command = self.checker_command % self.host
384
533
except TypeError:
385
534
# Escape attributes for the shell
386
escaped_attrs = dict((key, re.escape(str(val)))
387
for key, val in
388
vars(self).iteritems())
535
escaped_attrs = dict(
536
(attr,
537
re.escape(unicode(str(getattr(self, attr, "")),
538
errors=
539
'replace')))
540
for attr in
541
self.runtime_expansions)
542
389
543
try:
390
544
command = self.checker_command % escaped_attrs
391
except TypeError, error:
392
logger.error(u'Could not format string "%s":'
393
u' %s', self.checker_command, error)
545
except TypeError as error:
546
logger.error('Could not format string "%s":'
547
' %s', self.checker_command, error)
394
548
return True # Try again later
549
self.current_checker_command = command
395
550
try:
396
logger.info(u"Starting checker %r for %s",
551
logger.info("Starting checker %r for %s",
397
552
command, self.name)
398
553
# We don't need to redirect stdout and stderr, since
399
554
# in normal mode, that is already done by daemon(),
402
557
self.checker = subprocess.Popen(command,
403
558
close_fds=True,
404
559
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
411
560
self.checker_callback_tag = (gobject.child_watch_add
412
561
(self.checker.pid,
413
562
self.checker_callback,
418
567
if pid:
419
568
gobject.source_remove(self.checker_callback_tag)
420
569
self.checker_callback(pid, status, command)
421
except OSError, error:
422
logger.error(u"Failed to start subprocess: %s",
570
except OSError as error:
571
logger.error("Failed to start subprocess: %s",
423
572
error)
424
573
# Re-run this periodically if run by gobject.timeout_add
425
574
return True
431
580
self.checker_callback_tag = None
432
581
if getattr(self, "checker", None) is None:
433
582
return
434
logger.debug(u"Stopping checker for %(name)s", vars(self))
583
logger.debug("Stopping checker for %(name)s", vars(self))
435
584
try:
436
585
os.kill(self.checker.pid, signal.SIGTERM)
437
#os.sleep(0.5)
586
#time.sleep(0.5)
438
587
#if self.checker.poll() is None:
439
588
# os.kill(self.checker.pid, signal.SIGKILL)
440
except OSError, error:
589
except OSError as error:
441
590
if error.errno != errno.ESRCH: # No such process
442
591
raise
443
592
self.checker = None
444
if self.use_dbus:
445
self.PropertyChanged(dbus.String(u"checker_running"),
446
dbus.Boolean(False, variant_level=1))
447
448
def still_valid(self):
449
"""Has the timeout not yet passed for this client?"""
450
if not getattr(self, "enabled", False):
451
return False
452
now = datetime.datetime.utcnow()
453
if self.last_checked_ok is None:
454
return now < (self.created + self.timeout)
455
else:
456
return now < (self.last_checked_ok + self.timeout)
457
458
## D-Bus methods & signals
459
_interface = u"se.bsnet.fukt.Mandos.Client"
460
461
# CheckedOK - method
462
CheckedOK = dbus.service.method(_interface)(checked_ok)
463
CheckedOK.__name__ = "CheckedOK"
593
594
# Encrypts a client secret and stores it in a varible encrypted_secret
595
def encrypt_secret(self, key):
596
# Encryption-key need to be of a specific size, so we hash inputed key
597
hasheng = hashlib.sha256()
598
hasheng.update(key)
599
encryptionkey = hasheng.digest()
600
601
# Create validation hash so we know at decryption if it was sucessful
602
hasheng = hashlib.sha256()
603
hasheng.update(self.secret)
604
validationhash = hasheng.digest()
605
606
# Encrypt secret
607
iv = os.urandom(Crypto.Cipher.AES.block_size)
608
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
609
Crypto.Cipher.AES.MODE_CFB, iv)
610
ciphertext = ciphereng.encrypt(validationhash+self.secret)
611
self.encrypted_secret = (ciphertext, iv)
612
613
# Decrypt a encrypted client secret
614
def decrypt_secret(self, key):
615
# Decryption-key need to be of a specific size, so we hash inputed key
616
hasheng = hashlib.sha256()
617
hasheng.update(key)
618
encryptionkey = hasheng.digest()
619
620
# Decrypt encrypted secret
621
ciphertext, iv = self.encrypted_secret
622
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
623
Crypto.Cipher.AES.MODE_CFB, iv)
624
plain = ciphereng.decrypt(ciphertext)
625
626
# Validate decrypted secret to know if it was succesful
627
hasheng = hashlib.sha256()
628
validationhash = plain[:hasheng.digest_size]
629
secret = plain[hasheng.digest_size:]
630
hasheng.update(secret)
631
632
# if validation fails, we use key as new secret. Otherwhise, we use
633
# the decrypted secret
634
if hasheng.digest() == validationhash:
635
self.secret = secret
636
else:
637
self.secret = key
638
del self.encrypted_secret
639
640
641
def dbus_service_property(dbus_interface, signature="v",
642
access="readwrite", byte_arrays=False):
643
"""Decorators for marking methods of a DBusObjectWithProperties to
644
become properties on the D-Bus.
645
646
The decorated method will be called with no arguments by "Get"
647
and with one argument by "Set".
648
649
The parameters, where they are supported, are the same as
650
dbus.service.method, except there is only "signature", since the
651
type from Get() and the type sent to Set() is the same.
652
"""
653
# Encoding deeply encoded byte arrays is not supported yet by the
654
# "Set" method, so we fail early here:
655
if byte_arrays and signature != "ay":
656
raise ValueError("Byte arrays not supported for non-'ay'"
657
" signature %r" % signature)
658
def decorator(func):
659
func._dbus_is_property = True
660
func._dbus_interface = dbus_interface
661
func._dbus_signature = signature
662
func._dbus_access = access
663
func._dbus_name = func.__name__
664
if func._dbus_name.endswith("_dbus_property"):
665
func._dbus_name = func._dbus_name[:-14]
666
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
667
return func
668
return decorator
669
670
671
class DBusPropertyException(dbus.exceptions.DBusException):
672
"""A base class for D-Bus property-related exceptions
673
"""
674
def __unicode__(self):
675
return unicode(str(self))
676
677
678
class DBusPropertyAccessException(DBusPropertyException):
679
"""A property's access permissions disallows an operation.
680
"""
681
pass
682
683
684
class DBusPropertyNotFound(DBusPropertyException):
685
"""An attempt was made to access a non-existing property.
686
"""
687
pass
688
689
690
class DBusObjectWithProperties(dbus.service.Object):
691
"""A D-Bus object with properties.
692
693
Classes inheriting from this can use the dbus_service_property
694
decorator to expose methods as D-Bus properties. It exposes the
695
standard Get(), Set(), and GetAll() methods on the D-Bus.
696
"""
697
698
@staticmethod
699
def _is_dbus_property(obj):
700
return getattr(obj, "_dbus_is_property", False)
701
702
def _get_all_dbus_properties(self):
703
"""Returns a generator of (name, attribute) pairs
704
"""
705
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
706
for cls in self.__class__.__mro__
707
for name, prop in
708
inspect.getmembers(cls, self._is_dbus_property))
709
710
def _get_dbus_property(self, interface_name, property_name):
711
"""Returns a bound method if one exists which is a D-Bus
712
property with the specified name and interface.
713
"""
714
for cls in self.__class__.__mro__:
715
for name, value in (inspect.getmembers
716
(cls, self._is_dbus_property)):
717
if (value._dbus_name == property_name
718
and value._dbus_interface == interface_name):
719
return value.__get__(self)
720
721
# No such property
722
raise DBusPropertyNotFound(self.dbus_object_path + ":"
723
+ interface_name + "."
724
+ property_name)
725
726
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
727
out_signature="v")
728
def Get(self, interface_name, property_name):
729
"""Standard D-Bus property Get() method, see D-Bus standard.
730
"""
731
prop = self._get_dbus_property(interface_name, property_name)
732
if prop._dbus_access == "write":
733
raise DBusPropertyAccessException(property_name)
734
value = prop()
735
if not hasattr(value, "variant_level"):
736
return value
737
return type(value)(value, variant_level=value.variant_level+1)
738
739
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
740
def Set(self, interface_name, property_name, value):
741
"""Standard D-Bus property Set() method, see D-Bus standard.
742
"""
743
prop = self._get_dbus_property(interface_name, property_name)
744
if prop._dbus_access == "read":
745
raise DBusPropertyAccessException(property_name)
746
if prop._dbus_get_args_options["byte_arrays"]:
747
# The byte_arrays option is not supported yet on
748
# signatures other than "ay".
749
if prop._dbus_signature != "ay":
750
raise ValueError
751
value = dbus.ByteArray(''.join(unichr(byte)
752
for byte in value))
753
prop(value)
754
755
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
756
out_signature="a{sv}")
757
def GetAll(self, interface_name):
758
"""Standard D-Bus property GetAll() method, see D-Bus
759
standard.
760
761
Note: Will not include properties with access="write".
762
"""
763
all = {}
764
for name, prop in self._get_all_dbus_properties():
765
if (interface_name
766
and interface_name != prop._dbus_interface):
767
# Interface non-empty but did not match
768
continue
769
# Ignore write-only properties
770
if prop._dbus_access == "write":
771
continue
772
value = prop()
773
if not hasattr(value, "variant_level"):
774
all[name] = value
775
continue
776
all[name] = type(value)(value, variant_level=
777
value.variant_level+1)
778
return dbus.Dictionary(all, signature="sv")
779
780
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
781
out_signature="s",
782
path_keyword='object_path',
783
connection_keyword='connection')
784
def Introspect(self, object_path, connection):
785
"""Standard D-Bus method, overloaded to insert property tags.
786
"""
787
xmlstring = dbus.service.Object.Introspect(self, object_path,
788
connection)
789
try:
790
document = xml.dom.minidom.parseString(xmlstring)
791
def make_tag(document, name, prop):
792
e = document.createElement("property")
793
e.setAttribute("name", name)
794
e.setAttribute("type", prop._dbus_signature)
795
e.setAttribute("access", prop._dbus_access)
796
return e
797
for if_tag in document.getElementsByTagName("interface"):
798
for tag in (make_tag(document, name, prop)
799
for name, prop
800
in self._get_all_dbus_properties()
801
if prop._dbus_interface
802
== if_tag.getAttribute("name")):
803
if_tag.appendChild(tag)
804
# Add the names to the return values for the
805
# "org.freedesktop.DBus.Properties" methods
806
if (if_tag.getAttribute("name")
807
== "org.freedesktop.DBus.Properties"):
808
for cn in if_tag.getElementsByTagName("method"):
809
if cn.getAttribute("name") == "Get":
810
for arg in cn.getElementsByTagName("arg"):
811
if (arg.getAttribute("direction")
812
== "out"):
813
arg.setAttribute("name", "value")
814
elif cn.getAttribute("name") == "GetAll":
815
for arg in cn.getElementsByTagName("arg"):
816
if (arg.getAttribute("direction")
817
== "out"):
818
arg.setAttribute("name", "props")
819
xmlstring = document.toxml("utf-8")
820
document.unlink()
821
except (AttributeError, xml.dom.DOMException,
822
xml.parsers.expat.ExpatError) as error:
823
logger.error("Failed to override Introspection method",
824
error)
825
return xmlstring
826
827
828
def datetime_to_dbus (dt, variant_level=0):
829
"""Convert a UTC datetime.datetime() to a D-Bus type."""
830
if dt is None:
831
return dbus.String("", variant_level = variant_level)
832
return dbus.String(dt.isoformat(),
833
variant_level=variant_level)
834
835
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
836
.__metaclass__):
837
"""Applied to an empty subclass of a D-Bus object, this metaclass
838
will add additional D-Bus attributes matching a certain pattern.
839
"""
840
def __new__(mcs, name, bases, attr):
841
# Go through all the base classes which could have D-Bus
842
# methods, signals, or properties in them
843
for base in (b for b in bases
844
if issubclass(b, dbus.service.Object)):
845
# Go though all attributes of the base class
846
for attrname, attribute in inspect.getmembers(base):
847
# Ignore non-D-Bus attributes, and D-Bus attributes
848
# with the wrong interface name
849
if (not hasattr(attribute, "_dbus_interface")
850
or not attribute._dbus_interface
851
.startswith("se.recompile.Mandos")):
852
continue
853
# Create an alternate D-Bus interface name based on
854
# the current name
855
alt_interface = (attribute._dbus_interface
856
.replace("se.recompile.Mandos",
857
"se.bsnet.fukt.Mandos"))
858
# Is this a D-Bus signal?
859
if getattr(attribute, "_dbus_is_signal", False):
860
# Extract the original non-method function by
861
# black magic
862
nonmethod_func = (dict(
863
zip(attribute.func_code.co_freevars,
864
attribute.__closure__))["func"]
865
.cell_contents)
866
# Create a new, but exactly alike, function
867
# object, and decorate it to be a new D-Bus signal
868
# with the alternate D-Bus interface name
869
new_function = (dbus.service.signal
870
(alt_interface,
871
attribute._dbus_signature)
872
(types.FunctionType(
873
nonmethod_func.func_code,
874
nonmethod_func.func_globals,
875
nonmethod_func.func_name,
876
nonmethod_func.func_defaults,
877
nonmethod_func.func_closure)))
878
# Define a creator of a function to call both the
879
# old and new functions, so both the old and new
880
# signals gets sent when the function is called
881
def fixscope(func1, func2):
882
"""This function is a scope container to pass
883
func1 and func2 to the "call_both" function
884
outside of its arguments"""
885
def call_both(*args, **kwargs):
886
"""This function will emit two D-Bus
887
signals by calling func1 and func2"""
888
func1(*args, **kwargs)
889
func2(*args, **kwargs)
890
return call_both
891
# Create the "call_both" function and add it to
892
# the class
893
attr[attrname] = fixscope(attribute,
894
new_function)
895
# Is this a D-Bus method?
896
elif getattr(attribute, "_dbus_is_method", False):
897
# Create a new, but exactly alike, function
898
# object. Decorate it to be a new D-Bus method
899
# with the alternate D-Bus interface name. Add it
900
# to the class.
901
attr[attrname] = (dbus.service.method
902
(alt_interface,
903
attribute._dbus_in_signature,
904
attribute._dbus_out_signature)
905
(types.FunctionType
906
(attribute.func_code,
907
attribute.func_globals,
908
attribute.func_name,
909
attribute.func_defaults,
910
attribute.func_closure)))
911
# Is this a D-Bus property?
912
elif getattr(attribute, "_dbus_is_property", False):
913
# Create a new, but exactly alike, function
914
# object, and decorate it to be a new D-Bus
915
# property with the alternate D-Bus interface
916
# name. Add it to the class.
917
attr[attrname] = (dbus_service_property
918
(alt_interface,
919
attribute._dbus_signature,
920
attribute._dbus_access,
921
attribute
922
._dbus_get_args_options
923
["byte_arrays"])
924
(types.FunctionType
925
(attribute.func_code,
926
attribute.func_globals,
927
attribute.func_name,
928
attribute.func_defaults,
929
attribute.func_closure)))
930
return type.__new__(mcs, name, bases, attr)
931
932
class ClientDBus(Client, DBusObjectWithProperties):
933
"""A Client class using D-Bus
934
935
Attributes:
936
dbus_object_path: dbus.ObjectPath
937
bus: dbus.SystemBus()
938
"""
939
940
runtime_expansions = (Client.runtime_expansions
941
+ ("dbus_object_path",))
942
943
# dbus.service.Object doesn't use super(), so we can't either.
944
945
def __init__(self, bus = None, *args, **kwargs):
946
self.bus = bus
947
Client.__init__(self, *args, **kwargs)
948
949
self._approvals_pending = 0
950
# Only now, when this client is initialized, can it show up on
951
# the D-Bus
952
client_object_name = unicode(self.name).translate(
953
{ord("."): ord("_"),
954
ord("-"): ord("_")})
955
self.dbus_object_path = (dbus.ObjectPath
956
("/clients/" + client_object_name))
957
DBusObjectWithProperties.__init__(self, self.bus,
958
self.dbus_object_path)
959
960
def notifychangeproperty(transform_func,
961
dbus_name, type_func=lambda x: x,
962
variant_level=1):
963
""" Modify a variable so that it's a property which announces
964
its changes to DBus.
965
966
transform_fun: Function that takes a value and a variant_level
967
and transforms it to a D-Bus type.
968
dbus_name: D-Bus name of the variable
969
type_func: Function that transform the value before sending it
970
to the D-Bus. Default: no transform
971
variant_level: D-Bus variant level. Default: 1
972
"""
973
attrname = "_{0}".format(dbus_name)
974
def setter(self, value):
975
if hasattr(self, "dbus_object_path"):
976
if (not hasattr(self, attrname) or
977
type_func(getattr(self, attrname, None))
978
!= type_func(value)):
979
dbus_value = transform_func(type_func(value),
980
variant_level
981
=variant_level)
982
self.PropertyChanged(dbus.String(dbus_name),
983
dbus_value)
984
setattr(self, attrname, value)
985
986
return property(lambda self: getattr(self, attrname), setter)
987
988
989
expires = notifychangeproperty(datetime_to_dbus, "Expires")
990
approvals_pending = notifychangeproperty(dbus.Boolean,
991
"ApprovalPending",
992
type_func = bool)
993
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
994
last_enabled = notifychangeproperty(datetime_to_dbus,
995
"LastEnabled")
996
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
997
type_func = lambda checker:
998
checker is not None)
999
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1000
"LastCheckedOK")
1001
last_approval_request = notifychangeproperty(
1002
datetime_to_dbus, "LastApprovalRequest")
1003
approved_by_default = notifychangeproperty(dbus.Boolean,
1004
"ApprovedByDefault")
1005
approval_delay = notifychangeproperty(dbus.UInt16,
1006
"ApprovalDelay",
1007
type_func =
1008
_timedelta_to_milliseconds)
1009
approval_duration = notifychangeproperty(
1010
dbus.UInt16, "ApprovalDuration",
1011
type_func = _timedelta_to_milliseconds)
1012
host = notifychangeproperty(dbus.String, "Host")
1013
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1014
type_func =
1015
_timedelta_to_milliseconds)
1016
extended_timeout = notifychangeproperty(
1017
dbus.UInt16, "ExtendedTimeout",
1018
type_func = _timedelta_to_milliseconds)
1019
interval = notifychangeproperty(dbus.UInt16,
1020
"Interval",
1021
type_func =
1022
_timedelta_to_milliseconds)
1023
checker_command = notifychangeproperty(dbus.String, "Checker")
1024
1025
del notifychangeproperty
1026
1027
def __del__(self, *args, **kwargs):
1028
try:
1029
self.remove_from_connection()
1030
except LookupError:
1031
pass
1032
if hasattr(DBusObjectWithProperties, "__del__"):
1033
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1034
Client.__del__(self, *args, **kwargs)
1035
1036
def checker_callback(self, pid, condition, command,
1037
*args, **kwargs):
1038
self.checker_callback_tag = None
1039
self.checker = None
1040
if os.WIFEXITED(condition):
1041
exitstatus = os.WEXITSTATUS(condition)
1042
# Emit D-Bus signal
1043
self.CheckerCompleted(dbus.Int16(exitstatus),
1044
dbus.Int64(condition),
1045
dbus.String(command))
1046
else:
1047
# Emit D-Bus signal
1048
self.CheckerCompleted(dbus.Int16(-1),
1049
dbus.Int64(condition),
1050
dbus.String(command))
1051
1052
return Client.checker_callback(self, pid, condition, command,
1053
*args, **kwargs)
1054
1055
def start_checker(self, *args, **kwargs):
1056
old_checker = self.checker
1057
if self.checker is not None:
1058
old_checker_pid = self.checker.pid
1059
else:
1060
old_checker_pid = None
1061
r = Client.start_checker(self, *args, **kwargs)
1062
# Only if new checker process was started
1063
if (self.checker is not None
1064
and old_checker_pid != self.checker.pid):
1065
# Emit D-Bus signal
1066
self.CheckerStarted(self.current_checker_command)
1067
return r
1068
1069
def _reset_approved(self):
1070
self._approved = None
1071
return False
1072
1073
def approve(self, value=True):
1074
self.send_changedstate()
1075
self._approved = value
1076
gobject.timeout_add(_timedelta_to_milliseconds
1077
(self.approval_duration),
1078
self._reset_approved)
1079
1080
1081
## D-Bus methods, signals & properties
1082
_interface = "se.recompile.Mandos.Client"
1083
1084
## Signals
464
1085
465
1086
# CheckerCompleted - signal
466
1087
@dbus.service.signal(_interface, signature="nxs")
474
1095
"D-Bus signal"
475
1096
pass
476
1097
477
# GetAllProperties - method
478
@dbus.service.method(_interface, out_signature="a{sv}")
479
def GetAllProperties(self):
480
"D-Bus method"
481
return dbus.Dictionary({
482
dbus.String("name"):
483
dbus.String(self.name, variant_level=1),
484
dbus.String("fingerprint"):
485
dbus.String(self.fingerprint, variant_level=1),
486
dbus.String("host"):
487
dbus.String(self.host, variant_level=1),
488
dbus.String("created"):
489
_datetime_to_dbus(self.created, variant_level=1),
490
dbus.String("last_enabled"):
491
(_datetime_to_dbus(self.last_enabled,
492
variant_level=1)
493
if self.last_enabled is not None
494
else dbus.Boolean(False, variant_level=1)),
495
dbus.String("enabled"):
496
dbus.Boolean(self.enabled, variant_level=1),
497
dbus.String("last_checked_ok"):
498
(_datetime_to_dbus(self.last_checked_ok,
499
variant_level=1)
500
if self.last_checked_ok is not None
501
else dbus.Boolean (False, variant_level=1)),
502
dbus.String("timeout"):
503
dbus.UInt64(self.timeout_milliseconds(),
504
variant_level=1),
505
dbus.String("interval"):
506
dbus.UInt64(self.interval_milliseconds(),
507
variant_level=1),
508
dbus.String("checker"):
509
dbus.String(self.checker_command,
510
variant_level=1),
511
dbus.String("checker_running"):
512
dbus.Boolean(self.checker is not None,
513
variant_level=1),
514
dbus.String("object_path"):
515
dbus.ObjectPath(self.dbus_object_path,
516
variant_level=1)
517
}, signature="sv")
518
519
# IsStillValid - method
520
IsStillValid = (dbus.service.method(_interface, out_signature="b")
521
(still_valid))
522
IsStillValid.__name__ = "IsStillValid"
523
524
1098
# PropertyChanged - signal
525
1099
@dbus.service.signal(_interface, signature="sv")
526
1100
def PropertyChanged(self, property, value):
527
1101
"D-Bus signal"
528
1102
pass
529
1103
530
# SetChecker - method
531
@dbus.service.method(_interface, in_signature="s")
532
def SetChecker(self, checker):
533
"D-Bus setter method"
534
self.checker_command = checker
535
# Emit D-Bus signal
536
self.PropertyChanged(dbus.String(u"checker"),
537
dbus.String(self.checker_command,
538
variant_level=1))
539
540
# SetHost - method
541
@dbus.service.method(_interface, in_signature="s")
542
def SetHost(self, host):
543
"D-Bus setter method"
544
self.host = host
545
# Emit D-Bus signal
546
self.PropertyChanged(dbus.String(u"host"),
547
dbus.String(self.host, variant_level=1))
548
549
# SetInterval - method
550
@dbus.service.method(_interface, in_signature="t")
551
def SetInterval(self, milliseconds):
552
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
553
# Emit D-Bus signal
554
self.PropertyChanged(dbus.String(u"interval"),
555
(dbus.UInt64(self.interval_milliseconds(),
556
variant_level=1)))
557
558
# SetSecret - method
559
@dbus.service.method(_interface, in_signature="ay",
560
byte_arrays=True)
561
def SetSecret(self, secret):
562
"D-Bus setter method"
563
self.secret = str(secret)
564
565
# SetTimeout - method
566
@dbus.service.method(_interface, in_signature="t")
567
def SetTimeout(self, milliseconds):
568
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
569
# Emit D-Bus signal
570
self.PropertyChanged(dbus.String(u"timeout"),
571
(dbus.UInt64(self.timeout_milliseconds(),
572
variant_level=1)))
1104
# GotSecret - signal
1105
@dbus.service.signal(_interface)
1106
def GotSecret(self):
1107
"""D-Bus signal
1108
Is sent after a successful transfer of secret from the Mandos
1109
server to mandos-client
1110
"""
1111
pass
1112
1113
# Rejected - signal
1114
@dbus.service.signal(_interface, signature="s")
1115
def Rejected(self, reason):
1116
"D-Bus signal"
1117
pass
1118
1119
# NeedApproval - signal
1120
@dbus.service.signal(_interface, signature="tb")
1121
def NeedApproval(self, timeout, default):
1122
"D-Bus signal"
1123
return self.need_approval()
1124
1125
## Methods
1126
1127
# Approve - method
1128
@dbus.service.method(_interface, in_signature="b")
1129
def Approve(self, value):
1130
self.approve(value)
1131
1132
# CheckedOK - method
1133
@dbus.service.method(_interface)
1134
def CheckedOK(self):
1135
self.checked_ok()
573
1136
574
1137
# Enable - method
575
Enable = dbus.service.method(_interface)(enable)
576
Enable.__name__ = "Enable"
1138
@dbus.service.method(_interface)
1139
def Enable(self):
1140
"D-Bus method"
1141
self.enable()
577
1142
578
1143
# StartChecker - method
579
1144
@dbus.service.method(_interface)
588
1153
self.disable()
589
1154
590
1155
# StopChecker - method
591
StopChecker = dbus.service.method(_interface)(stop_checker)
592
StopChecker.__name__ = "StopChecker"
1156
@dbus.service.method(_interface)
1157
def StopChecker(self):
1158
self.stop_checker()
1159
1160
## Properties
1161
1162
# ApprovalPending - property
1163
@dbus_service_property(_interface, signature="b", access="read")
1164
def ApprovalPending_dbus_property(self):
1165
return dbus.Boolean(bool(self.approvals_pending))
1166
1167
# ApprovedByDefault - property
1168
@dbus_service_property(_interface, signature="b",
1169
access="readwrite")
1170
def ApprovedByDefault_dbus_property(self, value=None):
1171
if value is None: # get
1172
return dbus.Boolean(self.approved_by_default)
1173
self.approved_by_default = bool(value)
1174
1175
# ApprovalDelay - property
1176
@dbus_service_property(_interface, signature="t",
1177
access="readwrite")
1178
def ApprovalDelay_dbus_property(self, value=None):
1179
if value is None: # get
1180
return dbus.UInt64(self.approval_delay_milliseconds())
1181
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1182
1183
# ApprovalDuration - property
1184
@dbus_service_property(_interface, signature="t",
1185
access="readwrite")
1186
def ApprovalDuration_dbus_property(self, value=None):
1187
if value is None: # get
1188
return dbus.UInt64(_timedelta_to_milliseconds(
1189
self.approval_duration))
1190
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1191
1192
# Name - property
1193
@dbus_service_property(_interface, signature="s", access="read")
1194
def Name_dbus_property(self):
1195
return dbus.String(self.name)
1196
1197
# Fingerprint - property
1198
@dbus_service_property(_interface, signature="s", access="read")
1199
def Fingerprint_dbus_property(self):
1200
return dbus.String(self.fingerprint)
1201
1202
# Host - property
1203
@dbus_service_property(_interface, signature="s",
1204
access="readwrite")
1205
def Host_dbus_property(self, value=None):
1206
if value is None: # get
1207
return dbus.String(self.host)
1208
self.host = value
1209
1210
# Created - property
1211
@dbus_service_property(_interface, signature="s", access="read")
1212
def Created_dbus_property(self):
1213
return dbus.String(datetime_to_dbus(self.created))
1214
1215
# LastEnabled - property
1216
@dbus_service_property(_interface, signature="s", access="read")
1217
def LastEnabled_dbus_property(self):
1218
return datetime_to_dbus(self.last_enabled)
1219
1220
# Enabled - property
1221
@dbus_service_property(_interface, signature="b",
1222
access="readwrite")
1223
def Enabled_dbus_property(self, value=None):
1224
if value is None: # get
1225
return dbus.Boolean(self.enabled)
1226
if value:
1227
self.enable()
1228
else:
1229
self.disable()
1230
1231
# LastCheckedOK - property
1232
@dbus_service_property(_interface, signature="s",
1233
access="readwrite")
1234
def LastCheckedOK_dbus_property(self, value=None):
1235
if value is not None:
1236
self.checked_ok()
1237
return
1238
return datetime_to_dbus(self.last_checked_ok)
1239
1240
# Expires - property
1241
@dbus_service_property(_interface, signature="s", access="read")
1242
def Expires_dbus_property(self):
1243
return datetime_to_dbus(self.expires)
1244
1245
# LastApprovalRequest - property
1246
@dbus_service_property(_interface, signature="s", access="read")
1247
def LastApprovalRequest_dbus_property(self):
1248
return datetime_to_dbus(self.last_approval_request)
1249
1250
# Timeout - property
1251
@dbus_service_property(_interface, signature="t",
1252
access="readwrite")
1253
def Timeout_dbus_property(self, value=None):
1254
if value is None: # get
1255
return dbus.UInt64(self.timeout_milliseconds())
1256
self.timeout = datetime.timedelta(0, 0, 0, value)
1257
if getattr(self, "disable_initiator_tag", None) is None:
1258
return
1259
# Reschedule timeout
1260
gobject.source_remove(self.disable_initiator_tag)
1261
self.disable_initiator_tag = None
1262
self.expires = None
1263
time_to_die = _timedelta_to_milliseconds((self
1264
.last_checked_ok
1265
+ self.timeout)
1266
- datetime.datetime
1267
.utcnow())
1268
if time_to_die <= 0:
1269
# The timeout has passed
1270
self.disable()
1271
else:
1272
self.expires = (datetime.datetime.utcnow()
1273
+ datetime.timedelta(milliseconds =
1274
time_to_die))
1275
self.disable_initiator_tag = (gobject.timeout_add
1276
(time_to_die, self.disable))
1277
1278
# ExtendedTimeout - property
1279
@dbus_service_property(_interface, signature="t",
1280
access="readwrite")
1281
def ExtendedTimeout_dbus_property(self, value=None):
1282
if value is None: # get
1283
return dbus.UInt64(self.extended_timeout_milliseconds())
1284
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1285
1286
# Interval - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def Interval_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(self.interval_milliseconds())
1292
self.interval = datetime.timedelta(0, 0, 0, value)
1293
if getattr(self, "checker_initiator_tag", None) is None:
1294
return
1295
# Reschedule checker run
1296
gobject.source_remove(self.checker_initiator_tag)
1297
self.checker_initiator_tag = (gobject.timeout_add
1298
(value, self.start_checker))
1299
self.start_checker() # Start one now, too
1300
1301
# Checker - property
1302
@dbus_service_property(_interface, signature="s",
1303
access="readwrite")
1304
def Checker_dbus_property(self, value=None):
1305
if value is None: # get
1306
return dbus.String(self.checker_command)
1307
self.checker_command = value
1308
1309
# CheckerRunning - property
1310
@dbus_service_property(_interface, signature="b",
1311
access="readwrite")
1312
def CheckerRunning_dbus_property(self, value=None):
1313
if value is None: # get
1314
return dbus.Boolean(self.checker is not None)
1315
if value:
1316
self.start_checker()
1317
else:
1318
self.stop_checker()
1319
1320
# ObjectPath - property
1321
@dbus_service_property(_interface, signature="o", access="read")
1322
def ObjectPath_dbus_property(self):
1323
return self.dbus_object_path # is already a dbus.ObjectPath
1324
1325
# Secret = property
1326
@dbus_service_property(_interface, signature="ay",
1327
access="write", byte_arrays=True)
1328
def Secret_dbus_property(self, value):
1329
self.secret = str(value)
593
1330
594
1331
del _interface
595
1332
596
1333
597
def peer_certificate(session):
598
"Return the peer's OpenPGP certificate as a bytestring"
599
# If not an OpenPGP certificate...
600
if (gnutls.library.functions
601
.gnutls_certificate_type_get(session._c_object)
602
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
603
# ...do the normal thing
604
return session.peer_certificate
605
list_size = ctypes.c_uint(1)
606
cert_list = (gnutls.library.functions
607
.gnutls_certificate_get_peers
608
(session._c_object, ctypes.byref(list_size)))
609
if not bool(cert_list) and list_size.value != 0:
610
raise gnutls.errors.GNUTLSError("error getting peer"
611
" certificate")
612
if list_size.value == 0:
613
return None
614
cert = cert_list[0]
615
return ctypes.string_at(cert.data, cert.size)
616
617
618
def fingerprint(openpgp):
619
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
620
# New GnuTLS "datum" with the OpenPGP public key
621
datum = (gnutls.library.types
622
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
623
ctypes.POINTER
624
(ctypes.c_ubyte)),
625
ctypes.c_uint(len(openpgp))))
626
# New empty GnuTLS certificate
627
crt = gnutls.library.types.gnutls_openpgp_crt_t()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
630
# Import the OpenPGP public key into the certificate
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
633
gnutls.library.constants
634
.GNUTLS_OPENPGP_FMT_RAW))
635
# Verify the self signature in the key
636
crtverify = ctypes.c_uint()
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
639
if crtverify.value != 0:
640
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
raise gnutls.errors.CertificateSecurityError("Verify failed")
642
# New buffer for the fingerprint
643
buf = ctypes.create_string_buffer(20)
644
buf_len = ctypes.c_size_t()
645
# Get the fingerprint from the certificate into the buffer
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
648
ctypes.byref(buf_len)))
649
# Deinit the certificate
650
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
651
# Convert the buffer to a Python bytestring
652
fpr = ctypes.string_at(buf, buf_len.value)
653
# Convert the bytestring to hexadecimal notation
654
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
655
return hex_fpr
656
657
658
class TCP_handler(SocketServer.BaseRequestHandler, object):
659
"""A TCP request handler class.
660
Instantiated by IPv6_TCPServer for each request to handle it.
1334
class ProxyClient(object):
1335
def __init__(self, child_pipe, fpr, address):
1336
self._pipe = child_pipe
1337
self._pipe.send(('init', fpr, address))
1338
if not self._pipe.recv():
1339
raise KeyError()
1340
1341
def __getattribute__(self, name):
1342
if(name == '_pipe'):
1343
return super(ProxyClient, self).__getattribute__(name)
1344
self._pipe.send(('getattr', name))
1345
data = self._pipe.recv()
1346
if data[0] == 'data':
1347
return data[1]
1348
if data[0] == 'function':
1349
def func(*args, **kwargs):
1350
self._pipe.send(('funcall', name, args, kwargs))
1351
return self._pipe.recv()[1]
1352
return func
1353
1354
def __setattr__(self, name, value):
1355
if(name == '_pipe'):
1356
return super(ProxyClient, self).__setattr__(name, value)
1357
self._pipe.send(('setattr', name, value))
1358
1359
class ClientDBusTransitional(ClientDBus):
1360
__metaclass__ = AlternateDBusNamesMetaclass
1361
1362
class ClientHandler(socketserver.BaseRequestHandler, object):
1363
"""A class to handle client connections.
1364
1365
Instantiated once for each connection to handle it.
661
1366
Note: This will run in its own forked process."""
662
1367
663
1368
def handle(self):
664
logger.info(u"TCP connection from: %s",
665
unicode(self.client_address))
666
session = (gnutls.connection
667
.ClientSession(self.request,
668
gnutls.connection
669
.X509Credentials()))
670
671
line = self.request.makefile().readline()
672
logger.debug(u"Protocol version: %r", line)
673
try:
674
if int(line.strip().split()[0]) > 1:
675
raise RuntimeError
676
except (ValueError, IndexError, RuntimeError), error:
677
logger.error(u"Unknown protocol version: %s", error)
678
return
679
680
# Note: gnutls.connection.X509Credentials is really a generic
681
# GnuTLS certificate credentials object so long as no X.509
682
# keys are added to it. Therefore, we can use it here despite
683
# using OpenPGP certificates.
684
685
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
686
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
687
# "+DHE-DSS"))
688
# Use a fallback default, since this MUST be set.
689
priority = self.server.settings.get("priority", "NORMAL")
690
(gnutls.library.functions
691
.gnutls_priority_set_direct(session._c_object,
692
priority, None))
693
694
try:
695
session.handshake()
696
except gnutls.errors.GNUTLSError, error:
697
logger.warning(u"Handshake failed: %s", error)
698
# Do not run session.bye() here: the session is not
699
# established. Just abandon the request.
700
return
701
logger.debug(u"Handshake succeeded")
702
try:
703
fpr = fingerprint(peer_certificate(session))
704
except (TypeError, gnutls.errors.GNUTLSError), error:
705
logger.warning(u"Bad certificate: %s", error)
706
session.bye()
707
return
708
logger.debug(u"Fingerprint: %s", fpr)
709
710
for c in self.server.clients:
711
if c.fingerprint == fpr:
712
client = c
713
break
714
else:
715
logger.warning(u"Client not found for fingerprint: %s",
716
fpr)
717
session.bye()
718
return
719
# Have to check if client.still_valid(), since it is possible
720
# that the client timed out while establishing the GnuTLS
721
# session.
722
if not client.still_valid():
723
logger.warning(u"Client %(name)s is invalid",
724
vars(client))
725
session.bye()
726
return
727
## This won't work here, since we're in a fork.
728
# client.checked_ok()
729
sent_size = 0
730
while sent_size < len(client.secret):
731
sent = session.send(client.secret[sent_size:])
732
logger.debug(u"Sent: %d, remaining: %d",
733
sent, len(client.secret)
734
- (sent_size + sent))
735
sent_size += sent
736
session.bye()
737
738
739
class IPv6_TCPServer(SocketServer.ForkingMixIn,
740
SocketServer.TCPServer, object):
741
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1369
with contextlib.closing(self.server.child_pipe) as child_pipe:
1370
logger.info("TCP connection from: %s",
1371
unicode(self.client_address))
1372
logger.debug("Pipe FD: %d",
1373
self.server.child_pipe.fileno())
1374
1375
session = (gnutls.connection
1376
.ClientSession(self.request,
1377
gnutls.connection
1378
.X509Credentials()))
1379
1380
# Note: gnutls.connection.X509Credentials is really a
1381
# generic GnuTLS certificate credentials object so long as
1382
# no X.509 keys are added to it. Therefore, we can use it
1383
# here despite using OpenPGP certificates.
1384
1385
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1386
# "+AES-256-CBC", "+SHA1",
1387
# "+COMP-NULL", "+CTYPE-OPENPGP",
1388
# "+DHE-DSS"))
1389
# Use a fallback default, since this MUST be set.
1390
priority = self.server.gnutls_priority
1391
if priority is None:
1392
priority = "NORMAL"
1393
(gnutls.library.functions
1394
.gnutls_priority_set_direct(session._c_object,
1395
priority, None))
1396
1397
# Start communication using the Mandos protocol
1398
# Get protocol number
1399
line = self.request.makefile().readline()
1400
logger.debug("Protocol version: %r", line)
1401
try:
1402
if int(line.strip().split()[0]) > 1:
1403
raise RuntimeError
1404
except (ValueError, IndexError, RuntimeError) as error:
1405
logger.error("Unknown protocol version: %s", error)
1406
return
1407
1408
# Start GnuTLS connection
1409
try:
1410
session.handshake()
1411
except gnutls.errors.GNUTLSError as error:
1412
logger.warning("Handshake failed: %s", error)
1413
# Do not run session.bye() here: the session is not
1414
# established. Just abandon the request.
1415
return
1416
logger.debug("Handshake succeeded")
1417
1418
approval_required = False
1419
try:
1420
try:
1421
fpr = self.fingerprint(self.peer_certificate
1422
(session))
1423
except (TypeError,
1424
gnutls.errors.GNUTLSError) as error:
1425
logger.warning("Bad certificate: %s", error)
1426
return
1427
logger.debug("Fingerprint: %s", fpr)
1428
1429
try:
1430
client = ProxyClient(child_pipe, fpr,
1431
self.client_address)
1432
except KeyError:
1433
return
1434
1435
if client.approval_delay:
1436
delay = client.approval_delay
1437
client.approvals_pending += 1
1438
approval_required = True
1439
1440
while True:
1441
if not client.enabled:
1442
logger.info("Client %s is disabled",
1443
client.name)
1444
if self.server.use_dbus:
1445
# Emit D-Bus signal
1446
client.Rejected("Disabled")
1447
return
1448
1449
if client._approved or not client.approval_delay:
1450
#We are approved or approval is disabled
1451
break
1452
elif client._approved is None:
1453
logger.info("Client %s needs approval",
1454
client.name)
1455
if self.server.use_dbus:
1456
# Emit D-Bus signal
1457
client.NeedApproval(
1458
client.approval_delay_milliseconds(),
1459
client.approved_by_default)
1460
else:
1461
logger.warning("Client %s was not approved",
1462
client.name)
1463
if self.server.use_dbus:
1464
# Emit D-Bus signal
1465
client.Rejected("Denied")
1466
return
1467
1468
#wait until timeout or approved
1469
time = datetime.datetime.now()
1470
client.changedstate.acquire()
1471
(client.changedstate.wait
1472
(float(client._timedelta_to_milliseconds(delay)
1473
/ 1000)))
1474
client.changedstate.release()
1475
time2 = datetime.datetime.now()
1476
if (time2 - time) >= delay:
1477
if not client.approved_by_default:
1478
logger.warning("Client %s timed out while"
1479
" waiting for approval",
1480
client.name)
1481
if self.server.use_dbus:
1482
# Emit D-Bus signal
1483
client.Rejected("Approval timed out")
1484
return
1485
else:
1486
break
1487
else:
1488
delay -= time2 - time
1489
1490
sent_size = 0
1491
while sent_size < len(client.secret):
1492
try:
1493
sent = session.send(client.secret[sent_size:])
1494
except gnutls.errors.GNUTLSError as error:
1495
logger.warning("gnutls send failed")
1496
return
1497
logger.debug("Sent: %d, remaining: %d",
1498
sent, len(client.secret)
1499
- (sent_size + sent))
1500
sent_size += sent
1501
1502
logger.info("Sending secret to %s", client.name)
1503
# bump the timeout using extended_timeout
1504
client.checked_ok(client.extended_timeout)
1505
if self.server.use_dbus:
1506
# Emit D-Bus signal
1507
client.GotSecret()
1508
1509
finally:
1510
if approval_required:
1511
client.approvals_pending -= 1
1512
try:
1513
session.bye()
1514
except gnutls.errors.GNUTLSError as error:
1515
logger.warning("GnuTLS bye failed")
1516
1517
@staticmethod
1518
def peer_certificate(session):
1519
"Return the peer's OpenPGP certificate as a bytestring"
1520
# If not an OpenPGP certificate...
1521
if (gnutls.library.functions
1522
.gnutls_certificate_type_get(session._c_object)
1523
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1524
# ...do the normal thing
1525
return session.peer_certificate
1526
list_size = ctypes.c_uint(1)
1527
cert_list = (gnutls.library.functions
1528
.gnutls_certificate_get_peers
1529
(session._c_object, ctypes.byref(list_size)))
1530
if not bool(cert_list) and list_size.value != 0:
1531
raise gnutls.errors.GNUTLSError("error getting peer"
1532
" certificate")
1533
if list_size.value == 0:
1534
return None
1535
cert = cert_list[0]
1536
return ctypes.string_at(cert.data, cert.size)
1537
1538
@staticmethod
1539
def fingerprint(openpgp):
1540
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1541
# New GnuTLS "datum" with the OpenPGP public key
1542
datum = (gnutls.library.types
1543
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1544
ctypes.POINTER
1545
(ctypes.c_ubyte)),
1546
ctypes.c_uint(len(openpgp))))
1547
# New empty GnuTLS certificate
1548
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1549
(gnutls.library.functions
1550
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1551
# Import the OpenPGP public key into the certificate
1552
(gnutls.library.functions
1553
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1554
gnutls.library.constants
1555
.GNUTLS_OPENPGP_FMT_RAW))
1556
# Verify the self signature in the key
1557
crtverify = ctypes.c_uint()
1558
(gnutls.library.functions
1559
.gnutls_openpgp_crt_verify_self(crt, 0,
1560
ctypes.byref(crtverify)))
1561
if crtverify.value != 0:
1562
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1563
raise (gnutls.errors.CertificateSecurityError
1564
("Verify failed"))
1565
# New buffer for the fingerprint
1566
buf = ctypes.create_string_buffer(20)
1567
buf_len = ctypes.c_size_t()
1568
# Get the fingerprint from the certificate into the buffer
1569
(gnutls.library.functions
1570
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1571
ctypes.byref(buf_len)))
1572
# Deinit the certificate
1573
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1574
# Convert the buffer to a Python bytestring
1575
fpr = ctypes.string_at(buf, buf_len.value)
1576
# Convert the bytestring to hexadecimal notation
1577
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1578
return hex_fpr
1579
1580
1581
class MultiprocessingMixIn(object):
1582
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1583
def sub_process_main(self, request, address):
1584
try:
1585
self.finish_request(request, address)
1586
except:
1587
self.handle_error(request, address)
1588
self.close_request(request)
1589
1590
def process_request(self, request, address):
1591
"""Start a new process to process the request."""
1592
proc = multiprocessing.Process(target = self.sub_process_main,
1593
args = (request,
1594
address))
1595
proc.start()
1596
return proc
1597
1598
1599
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1600
""" adds a pipe to the MixIn """
1601
def process_request(self, request, client_address):
1602
"""Overrides and wraps the original process_request().
1603
1604
This function creates a new pipe in self.pipe
1605
"""
1606
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1607
1608
proc = MultiprocessingMixIn.process_request(self, request,
1609
client_address)
1610
self.child_pipe.close()
1611
self.add_pipe(parent_pipe, proc)
1612
1613
def add_pipe(self, parent_pipe, proc):
1614
"""Dummy function; override as necessary"""
1615
raise NotImplementedError
1616
1617
1618
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1619
socketserver.TCPServer, object):
1620
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1621
742
1622
Attributes:
743
settings: Server settings
744
clients: Set() of Client objects
745
1623
enabled: Boolean; whether this server is activated yet
1624
interface: None or a network interface name (string)
1625
use_ipv6: Boolean; to use IPv6 or not
746
1626
"""
747
address_family = socket.AF_INET6
748
def __init__(self, *args, **kwargs):
749
if "settings" in kwargs:
750
self.settings = kwargs["settings"]
751
del kwargs["settings"]
752
if "clients" in kwargs:
753
self.clients = kwargs["clients"]
754
del kwargs["clients"]
755
self.enabled = False
756
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1627
def __init__(self, server_address, RequestHandlerClass,
1628
interface=None, use_ipv6=True):
1629
self.interface = interface
1630
if use_ipv6:
1631
self.address_family = socket.AF_INET6
1632
socketserver.TCPServer.__init__(self, server_address,
1633
RequestHandlerClass)
757
1634
def server_bind(self):
758
1635
"""This overrides the normal server_bind() function
759
1636
to bind to an interface if one was specified, and also NOT to
760
1637
bind to an address or port if they were not specified."""
761
if self.settings["interface"]:
762
# 25 is from /usr/include/asm-i486/socket.h
763
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
764
try:
765
self.socket.setsockopt(socket.SOL_SOCKET,
766
SO_BINDTODEVICE,
767
self.settings["interface"])
768
except socket.error, error:
769
if error[0] == errno.EPERM:
770
logger.error(u"No permission to"
771
u" bind to interface %s",
772
self.settings["interface"])
773
else:
774
raise
1638
if self.interface is not None:
1639
if SO_BINDTODEVICE is None:
1640
logger.error("SO_BINDTODEVICE does not exist;"
1641
" cannot bind to interface %s",
1642
self.interface)
1643
else:
1644
try:
1645
self.socket.setsockopt(socket.SOL_SOCKET,
1646
SO_BINDTODEVICE,
1647
str(self.interface
1648
+ '\0'))
1649
except socket.error as error:
1650
if error[0] == errno.EPERM:
1651
logger.error("No permission to"
1652
" bind to interface %s",
1653
self.interface)
1654
elif error[0] == errno.ENOPROTOOPT:
1655
logger.error("SO_BINDTODEVICE not available;"
1656
" cannot bind to interface %s",
1657
self.interface)
1658
else:
1659
raise
775
1660
# Only bind(2) the socket if we really need to.
776
1661
if self.server_address[0] or self.server_address[1]:
777
1662
if not self.server_address[0]:
778
in6addr_any = "::"
779
self.server_address = (in6addr_any,
1663
if self.address_family == socket.AF_INET6:
1664
any_address = "::" # in6addr_any
1665
else:
1666
any_address = socket.INADDR_ANY
1667
self.server_address = (any_address,
780
1668
self.server_address[1])
781
1669
elif not self.server_address[1]:
782
1670
self.server_address = (self.server_address[0],
783
1671
0)
784
# if self.settings["interface"]:
1672
# if self.interface:
785
1673
# self.server_address = (self.server_address[0],
786
1674
# 0, # port
787
1675
# 0, # flowinfo
788
1676
# if_nametoindex
789
# (self.settings
790
# ["interface"]))
791
return super(IPv6_TCPServer, self).server_bind()
1677
# (self.interface))
1678
return socketserver.TCPServer.server_bind(self)
1679
1680
1681
class MandosServer(IPv6_TCPServer):
1682
"""Mandos server.
1683
1684
Attributes:
1685
clients: set of Client objects
1686
gnutls_priority GnuTLS priority string
1687
use_dbus: Boolean; to emit D-Bus signals or not
1688
1689
Assumes a gobject.MainLoop event loop.
1690
"""
1691
def __init__(self, server_address, RequestHandlerClass,
1692
interface=None, use_ipv6=True, clients=None,
1693
gnutls_priority=None, use_dbus=True):
1694
self.enabled = False
1695
self.clients = clients
1696
if self.clients is None:
1697
self.clients = {}
1698
self.use_dbus = use_dbus
1699
self.gnutls_priority = gnutls_priority
1700
IPv6_TCPServer.__init__(self, server_address,
1701
RequestHandlerClass,
1702
interface = interface,
1703
use_ipv6 = use_ipv6)
792
1704
def server_activate(self):
793
1705
if self.enabled:
794
return super(IPv6_TCPServer, self).server_activate()
1706
return socketserver.TCPServer.server_activate(self)
1707
795
1708
def enable(self):
796
1709
self.enabled = True
1710
1711
def add_pipe(self, parent_pipe, proc):
1712
# Call "handle_ipc" for both data and EOF events
1713
gobject.io_add_watch(parent_pipe.fileno(),
1714
gobject.IO_IN | gobject.IO_HUP,
1715
functools.partial(self.handle_ipc,
1716
parent_pipe =
1717
parent_pipe,
1718
proc = proc))
1719
1720
def handle_ipc(self, source, condition, parent_pipe=None,
1721
proc = None, client_object=None):
1722
condition_names = {
1723
gobject.IO_IN: "IN", # There is data to read.
1724
gobject.IO_OUT: "OUT", # Data can be written (without
1725
# blocking).
1726
gobject.IO_PRI: "PRI", # There is urgent data to read.
1727
gobject.IO_ERR: "ERR", # Error condition.
1728
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1729
# broken, usually for pipes and
1730
# sockets).
1731
}
1732
conditions_string = ' | '.join(name
1733
for cond, name in
1734
condition_names.iteritems()
1735
if cond & condition)
1736
# error, or the other end of multiprocessing.Pipe has closed
1737
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1738
# Wait for other process to exit
1739
proc.join()
1740
return False
1741
1742
# Read a request from the child
1743
request = parent_pipe.recv()
1744
command = request[0]
1745
1746
if command == 'init':
1747
fpr = request[1]
1748
address = request[2]
1749
1750
for c in self.clients.itervalues():
1751
if c.fingerprint == fpr:
1752
client = c
1753
break
1754
else:
1755
logger.info("Client not found for fingerprint: %s, ad"
1756
"dress: %s", fpr, address)
1757
if self.use_dbus:
1758
# Emit D-Bus signal
1759
mandos_dbus_service.ClientNotFound(fpr,
1760
address[0])
1761
parent_pipe.send(False)
1762
return False
1763
1764
gobject.io_add_watch(parent_pipe.fileno(),
1765
gobject.IO_IN | gobject.IO_HUP,
1766
functools.partial(self.handle_ipc,
1767
parent_pipe =
1768
parent_pipe,
1769
proc = proc,
1770
client_object =
1771
client))
1772
parent_pipe.send(True)
1773
# remove the old hook in favor of the new above hook on
1774
# same fileno
1775
return False
1776
if command == 'funcall':
1777
funcname = request[1]
1778
args = request[2]
1779
kwargs = request[3]
1780
1781
parent_pipe.send(('data', getattr(client_object,
1782
funcname)(*args,
1783
**kwargs)))
1784
1785
if command == 'getattr':
1786
attrname = request[1]
1787
if callable(client_object.__getattribute__(attrname)):
1788
parent_pipe.send(('function',))
1789
else:
1790
parent_pipe.send(('data', client_object
1791
.__getattribute__(attrname)))
1792
1793
if command == 'setattr':
1794
attrname = request[1]
1795
value = request[2]
1796
setattr(client_object, attrname, value)
1797
1798
return True
797
1799
798
1800
799
1801
def string_to_delta(interval):
807
1809
datetime.timedelta(0, 3600)
808
1810
>>> string_to_delta('24h')
809
1811
datetime.timedelta(1)
810
>>> string_to_delta(u'1w')
1812
>>> string_to_delta('1w')
811
1813
datetime.timedelta(7)
812
1814
>>> string_to_delta('5m 30s')
813
1815
datetime.timedelta(0, 330)
817
1819
try:
818
1820
suffix = unicode(s[-1])
819
1821
value = int(s[:-1])
820
if suffix == u"d":
1822
if suffix == "d":
821
1823
delta = datetime.timedelta(value)
822
elif suffix == u"s":
1824
elif suffix == "s":
823
1825
delta = datetime.timedelta(0, value)
824
elif suffix == u"m":
1826
elif suffix == "m":
825
1827
delta = datetime.timedelta(0, 0, 0, 0, value)
826
elif suffix == u"h":
1828
elif suffix == "h":
827
1829
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
828
elif suffix == u"w":
1830
elif suffix == "w":
829
1831
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
830
1832
else:
831
raise ValueError
832
except (ValueError, IndexError):
833
raise ValueError
1833
raise ValueError("Unknown suffix %r" % suffix)
1834
except (ValueError, IndexError) as e:
1835
raise ValueError(*(e.args))
834
1836
timevalue += delta
835
1837
return timevalue
836
1838
837
1839
838
def server_state_changed(state):
839
"""Derived from the Avahi example code"""
840
if state == avahi.SERVER_COLLISION:
841
logger.error(u"Zeroconf server name collision")
842
service.remove()
843
elif state == avahi.SERVER_RUNNING:
844
service.add()
845
846
847
def entry_group_state_changed(state, error):
848
"""Derived from the Avahi example code"""
849
logger.debug(u"Avahi state change: %i", state)
850
851
if state == avahi.ENTRY_GROUP_ESTABLISHED:
852
logger.debug(u"Zeroconf service established.")
853
elif state == avahi.ENTRY_GROUP_COLLISION:
854
logger.warning(u"Zeroconf service name collision.")
855
service.rename()
856
elif state == avahi.ENTRY_GROUP_FAILURE:
857
logger.critical(u"Avahi: Error in group state changed %s",
858
unicode(error))
859
raise AvahiGroupError(u"State changed: %s" % unicode(error))
860
861
1840
def if_nametoindex(interface):
862
"""Call the C function if_nametoindex(), or equivalent"""
1841
"""Call the C function if_nametoindex(), or equivalent
1842
1843
Note: This function cannot accept a unicode string."""
863
1844
global if_nametoindex
864
1845
try:
865
1846
if_nametoindex = (ctypes.cdll.LoadLibrary
866
1847
(ctypes.util.find_library("c"))
867
1848
.if_nametoindex)
868
1849
except (OSError, AttributeError):
869
if "struct" not in sys.modules:
870
import struct
871
if "fcntl" not in sys.modules:
872
import fcntl
1850
logger.warning("Doing if_nametoindex the hard way")
873
1851
def if_nametoindex(interface):
874
1852
"Get an interface index the hard way, i.e. using fcntl()"
875
1853
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
876
with closing(socket.socket()) as s:
1854
with contextlib.closing(socket.socket()) as s:
877
1855
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
878
struct.pack("16s16x", interface))
879
interface_index = struct.unpack("I", ifreq[16:20])[0]
1856
struct.pack(str("16s16x"),
1857
interface))
1858
interface_index = struct.unpack(str("I"),
1859
ifreq[16:20])[0]
880
1860
return interface_index
881
1861
return if_nametoindex(interface)
882
1862
883
1863
884
1864
def daemon(nochdir = False, noclose = False):
885
1865
"""See daemon(3). Standard BSD Unix function.
1866
886
1867
This should really exist as os.daemon, but it doesn't (yet)."""
887
1868
if os.fork():
888
1869
sys.exit()
896
1877
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
897
1878
if not stat.S_ISCHR(os.fstat(null).st_mode):
898
1879
raise OSError(errno.ENODEV,
899
"/dev/null not a character device")
1880
"%s not a character device"
1881
% os.path.devnull)
900
1882
os.dup2(null, sys.stdin.fileno())
901
1883
os.dup2(null, sys.stdout.fileno())
902
1884
os.dup2(null, sys.stderr.fileno())
905
1887
906
1888
907
1889
def main():
908
parser = optparse.OptionParser(version = "%%prog %s" % version)
909
parser.add_option("-i", "--interface", type="string",
910
metavar="IF", help="Bind to interface IF")
911
parser.add_option("-a", "--address", type="string",
912
help="Address to listen for requests on")
913
parser.add_option("-p", "--port", type="int",
914
help="Port number to receive requests on")
915
parser.add_option("--check", action="store_true",
916
help="Run self-test")
917
parser.add_option("--debug", action="store_true",
918
help="Debug mode; run in foreground and log to"
919
" terminal")
920
parser.add_option("--priority", type="string", help="GnuTLS"
921
" priority string (see GnuTLS documentation)")
922
parser.add_option("--servicename", type="string", metavar="NAME",
923
help="Zeroconf service name")
924
parser.add_option("--configdir", type="string",
925
default="/etc/mandos", metavar="DIR",
926
help="Directory to search for configuration"
927
" files")
928
parser.add_option("--no-dbus", action="store_false",
929
dest="use_dbus",
930
help="Do not provide D-Bus system bus"
931
" interface")
932
options = parser.parse_args()[0]
1890
1891
##################################################################
1892
# Parsing of options, both command line and config file
1893
1894
parser = argparse.ArgumentParser()
1895
parser.add_argument("-v", "--version", action="version",
1896
version = "%%(prog)s %s" % version,
1897
help="show version number and exit")
1898
parser.add_argument("-i", "--interface", metavar="IF",
1899
help="Bind to interface IF")
1900
parser.add_argument("-a", "--address",
1901
help="Address to listen for requests on")
1902
parser.add_argument("-p", "--port", type=int,
1903
help="Port number to receive requests on")
1904
parser.add_argument("--check", action="store_true",
1905
help="Run self-test")
1906
parser.add_argument("--debug", action="store_true",
1907
help="Debug mode; run in foreground and log"
1908
" to terminal")
1909
parser.add_argument("--debuglevel", metavar="LEVEL",
1910
help="Debug level for stdout output")
1911
parser.add_argument("--priority", help="GnuTLS"
1912
" priority string (see GnuTLS documentation)")
1913
parser.add_argument("--servicename",
1914
metavar="NAME", help="Zeroconf service name")
1915
parser.add_argument("--configdir",
1916
default="/etc/mandos", metavar="DIR",
1917
help="Directory to search for configuration"
1918
" files")
1919
parser.add_argument("--no-dbus", action="store_false",
1920
dest="use_dbus", help="Do not provide D-Bus"
1921
" system bus interface")
1922
parser.add_argument("--no-ipv6", action="store_false",
1923
dest="use_ipv6", help="Do not use IPv6")
1924
parser.add_argument("--no-restore", action="store_false",
1925
dest="restore", help="Do not restore stored state",
1926
default=True)
1927
1928
options = parser.parse_args()
933
1929
934
1930
if options.check:
935
1931
import doctest
945
1941
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
946
1942
"servicename": "Mandos",
947
1943
"use_dbus": "True",
1944
"use_ipv6": "True",
1945
"debuglevel": "",
948
1946
}
949
1947
950
1948
# Parse config file for server-global settings
951
server_config = ConfigParser.SafeConfigParser(server_defaults)
1949
server_config = configparser.SafeConfigParser(server_defaults)
952
1950
del server_defaults
953
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1951
server_config.read(os.path.join(options.configdir,
1952
"mandos.conf"))
954
1953
# Convert the SafeConfigParser object to a dict
955
1954
server_settings = server_config.defaults()
956
1955
# Use the appropriate methods on the non-string config options
957
server_settings["debug"] = server_config.getboolean("DEFAULT",
958
"debug")
959
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
960
"use_dbus")
1956
for option in ("debug", "use_dbus", "use_ipv6"):
1957
server_settings[option] = server_config.getboolean("DEFAULT",
1958
option)
961
1959
if server_settings["port"]:
962
1960
server_settings["port"] = server_config.getint("DEFAULT",
963
1961
"port")
967
1965
# options, if set.
968
1966
for option in ("interface", "address", "port", "debug",
969
1967
"priority", "servicename", "configdir",
970
"use_dbus"):
1968
"use_dbus", "use_ipv6", "debuglevel", "restore"):
971
1969
value = getattr(options, option)
972
1970
if value is not None:
973
1971
server_settings[option] = value
974
1972
del options
1973
# Force all strings to be unicode
1974
for option in server_settings.keys():
1975
if type(server_settings[option]) is str:
1976
server_settings[option] = unicode(server_settings[option])
975
1977
# Now we have our good server settings in "server_settings"
976
1978
1979
##################################################################
1980
977
1981
# For convenience
978
1982
debug = server_settings["debug"]
1983
debuglevel = server_settings["debuglevel"]
979
1984
use_dbus = server_settings["use_dbus"]
980
981
if not debug:
982
syslogger.setLevel(logging.WARNING)
983
console.setLevel(logging.WARNING)
1985
use_ipv6 = server_settings["use_ipv6"]
984
1986
985
1987
if server_settings["servicename"] != "Mandos":
986
1988
syslogger.setFormatter(logging.Formatter
987
('Mandos (%s): %%(levelname)s:'
988
' %%(message)s'
1989
('Mandos (%s) [%%(process)d]:'
1990
' %%(levelname)s: %%(message)s'
989
1991
% server_settings["servicename"]))
990
1992
991
1993
# Parse config file with clients
992
client_defaults = { "timeout": "1h",
993
"interval": "5m",
1994
client_defaults = { "timeout": "5m",
1995
"extended_timeout": "15m",
1996
"interval": "2m",
994
1997
"checker": "fping -q -- %%(host)s",
995
1998
"host": "",
1999
"approval_delay": "0s",
2000
"approval_duration": "1s",
996
2001
}
997
client_config = ConfigParser.SafeConfigParser(client_defaults)
2002
client_config = configparser.SafeConfigParser(client_defaults)
998
2003
client_config.read(os.path.join(server_settings["configdir"],
999
2004
"clients.conf"))
1000
2005
1001
clients = Set()
1002
tcp_server = IPv6_TCPServer((server_settings["address"],
1003
server_settings["port"]),
1004
TCP_handler,
1005
settings=server_settings,
1006
clients=clients)
1007
pidfilename = "/var/run/mandos.pid"
1008
try:
1009
pidfile = open(pidfilename, "w")
1010
except IOError:
1011
logger.error("Could not open file %r", pidfilename)
2006
global mandos_dbus_service
2007
mandos_dbus_service = None
2008
2009
tcp_server = MandosServer((server_settings["address"],
2010
server_settings["port"]),
2011
ClientHandler,
2012
interface=(server_settings["interface"]
2013
or None),
2014
use_ipv6=use_ipv6,
2015
gnutls_priority=
2016
server_settings["priority"],
2017
use_dbus=use_dbus)
2018
if not debug:
2019
pidfilename = "/var/run/mandos.pid"
2020
try:
2021
pidfile = open(pidfilename, "w")
2022
except IOError:
2023
logger.error("Could not open file %r", pidfilename)
1012
2024
1013
2025
try:
1014
2026
uid = pwd.getpwnam("_mandos").pw_uid
1020
2032
except KeyError:
1021
2033
try:
1022
2034
uid = pwd.getpwnam("nobody").pw_uid
1023
gid = pwd.getpwnam("nogroup").pw_gid
2035
gid = pwd.getpwnam("nobody").pw_gid
1024
2036
except KeyError:
1025
2037
uid = 65534
1026
2038
gid = 65534
1027
2039
try:
1028
2040
os.setgid(gid)
1029
2041
os.setuid(uid)
1030
except OSError, error:
2042
except OSError as error:
1031
2043
if error[0] != errno.EPERM:
1032
2044
raise error
1033
2045
1034
# Enable all possible GnuTLS debugging
2046
if not debug and not debuglevel:
2047
logger.setLevel(logging.WARNING)
2048
if debuglevel:
2049
level = getattr(logging, debuglevel.upper())
2050
logger.setLevel(level)
2051
1035
2052
if debug:
2053
logger.setLevel(logging.DEBUG)
2054
# Enable all possible GnuTLS debugging
2055
1036
2056
# "Use a log level over 10 to enable all debugging options."
1037
2057
# - GnuTLS manual
1038
2058
gnutls.library.functions.gnutls_global_set_log_level(11)
1043
2063
1044
2064
(gnutls.library.functions
1045
2065
.gnutls_global_set_log_function(debug_gnutls))
2066
2067
# Redirect stdin so all checkers get /dev/null
2068
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2069
os.dup2(null, sys.stdin.fileno())
2070
if null > 2:
2071
os.close(null)
2072
else:
2073
# No console logging
2074
logger.removeHandler(console)
1046
2075
1047
global service
1048
service = AvahiService(name = server_settings["servicename"],
1049
servicetype = "_mandos._tcp", )
1050
if server_settings["interface"]:
1051
service.interface = (if_nametoindex
1052
(server_settings["interface"]))
2076
# Need to fork before connecting to D-Bus
2077
if not debug:
2078
# Close all input and output, do double fork, etc.
2079
daemon()
1053
2080
1054
2081
global main_loop
1055
global bus
1056
global server
1057
2082
# From the Avahi example code
1058
2083
DBusGMainLoop(set_as_default=True )
1059
2084
main_loop = gobject.MainLoop()
1060
2085
bus = dbus.SystemBus()
1061
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1062
avahi.DBUS_PATH_SERVER),
1063
avahi.DBUS_INTERFACE_SERVER)
1064
2086
# End of Avahi example code
1065
2087
if use_dbus:
1066
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1067
1068
clients.update(Set(Client(name = section,
1069
config
1070
= dict(client_config.items(section)),
1071
use_dbus = use_dbus)
1072
for section in client_config.sections()))
1073
if not clients:
1074
logger.warning(u"No clients defined")
1075
1076
if debug:
1077
# Redirect stdin so all checkers get /dev/null
1078
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1079
os.dup2(null, sys.stdin.fileno())
1080
if null > 2:
1081
os.close(null)
1082
else:
1083
# No console logging
1084
logger.removeHandler(console)
1085
# Close all input and output, do double fork, etc.
1086
daemon()
1087
1088
try:
1089
pid = os.getpid()
1090
pidfile.write(str(pid) + "\n")
1091
pidfile.close()
1092
del pidfile
1093
except IOError:
1094
logger.error(u"Could not write to file %r with PID %d",
1095
pidfilename, pid)
1096
except NameError:
1097
# "pidfile" was never created
1098
pass
1099
del pidfilename
1100
1101
def cleanup():
1102
"Cleanup function; run on exit"
1103
global group
1104
# From the Avahi example code
1105
if not group is None:
1106
group.Free()
1107
group = None
1108
# End of Avahi example code
1109
1110
while clients:
1111
client = clients.pop()
1112
client.disable_hook = None
1113
client.disable()
1114
1115
atexit.register(cleanup)
1116
2088
try:
2089
bus_name = dbus.service.BusName("se.recompile.Mandos",
2090
bus, do_not_queue=True)
2091
old_bus_name = (dbus.service.BusName
2092
("se.bsnet.fukt.Mandos", bus,
2093
do_not_queue=True))
2094
except dbus.exceptions.NameExistsException as e:
2095
logger.error(unicode(e) + ", disabling D-Bus")
2096
use_dbus = False
2097
server_settings["use_dbus"] = False
2098
tcp_server.use_dbus = False
2099
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2100
service = AvahiServiceToSyslog(name =
2101
server_settings["servicename"],
2102
servicetype = "_mandos._tcp",
2103
protocol = protocol, bus = bus)
2104
if server_settings["interface"]:
2105
service.interface = (if_nametoindex
2106
(str(server_settings["interface"])))
2107
2108
global multiprocessing_manager
2109
multiprocessing_manager = multiprocessing.Manager()
2110
2111
client_class = Client
2112
if use_dbus:
2113
client_class = functools.partial(ClientDBusTransitional,
2114
bus = bus)
2115
2116
special_settings = {
2117
# Some settings need to be accessd by special methods;
2118
# booleans need .getboolean(), etc. Here is a list of them:
2119
"approved_by_default":
2120
lambda section:
2121
client_config.getboolean(section, "approved_by_default"),
2122
}
2123
# Construct a new dict of client settings of this form:
2124
# { client_name: {setting_name: value, ...}, ...}
2125
# with exceptions for any special settings as defined above
2126
client_settings = dict((clientname,
2127
dict((setting,
2128
(value if setting not in special_settings
2129
else special_settings[setting](clientname)))
2130
for setting, value in client_config.items(clientname)))
2131
for clientname in client_config.sections())
2132
2133
old_client_settings = {}
2134
clients_data = []
2135
2136
# Get client data and settings from last running state.
2137
if server_settings["restore"]:
2138
try:
2139
with open(stored_state_path, "rb") as stored_state:
2140
clients_data, old_client_settings = pickle.load(stored_state)
2141
os.remove(stored_state_path)
2142
except IOError as e:
2143
logger.warning("Could not load persistant state: {0}".format(e))
2144
if e.errno != errno.ENOENT:
2145
raise
2146
2147
for client in clients_data:
2148
client_name = client["name"]
2149
2150
# Decide which value to use after restoring saved state.
2151
# We have three different values: Old config file,
2152
# new config file, and saved state.
2153
# New config value takes precedence if it differs from old
2154
# config value, otherwise use saved state.
2155
for name, value in client_settings[client_name].items():
2156
try:
2157
# For each value in new config, check if it differs
2158
# from the old config value (Except for the "secret"
2159
# attribute)
2160
if name != "secret" and value != old_client_settings[client_name][name]:
2161
setattr(client, name, value)
2162
except KeyError:
2163
pass
2164
2165
# Clients who has passed its expire date, can still be enabled if its
2166
# last checker was sucessful. Clients who checkers failed before we
2167
# stored it state is asumed to had failed checker during downtime.
2168
if client["enabled"] and client["last_checked_ok"]:
2169
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2170
> client["interval"]):
2171
if client["last_checker_status"] != 0:
2172
client["enabled"] = False
2173
else:
2174
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2175
2176
client["changedstate"] = (multiprocessing_manager
2177
.Condition(multiprocessing_manager
2178
.Lock()))
2179
if use_dbus:
2180
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2181
tcp_server.clients[client_name] = new_client
2182
new_client.bus = bus
2183
for name, value in client.iteritems():
2184
setattr(new_client, name, value)
2185
client_object_name = unicode(client_name).translate(
2186
{ord("."): ord("_"),
2187
ord("-"): ord("_")})
2188
new_client.dbus_object_path = (dbus.ObjectPath
2189
("/clients/" + client_object_name))
2190
DBusObjectWithProperties.__init__(new_client,
2191
new_client.bus,
2192
new_client.dbus_object_path)
2193
else:
2194
tcp_server.clients[client_name] = Client.__new__(Client)
2195
for name, value in client.iteritems():
2196
setattr(tcp_server.clients[client_name], name, value)
2197
2198
tcp_server.clients[client_name].decrypt_secret(
2199
client_settings[client_name]["secret"])
2200
2201
# Create/remove clients based on new changes made to config
2202
for clientname in set(old_client_settings) - set(client_settings):
2203
del tcp_server.clients[clientname]
2204
for clientname in set(client_settings) - set(old_client_settings):
2205
tcp_server.clients[clientname] = (client_class(name = clientname,
2206
config =
2207
client_settings
2208
[clientname]))
2209
2210
2211
if not tcp_server.clients:
2212
logger.warning("No clients defined")
2213
1117
2214
if not debug:
2215
try:
2216
with pidfile:
2217
pid = os.getpid()
2218
pidfile.write(str(pid) + "\n".encode("utf-8"))
2219
del pidfile
2220
except IOError:
2221
logger.error("Could not write to file %r with PID %d",
2222
pidfilename, pid)
2223
except NameError:
2224
# "pidfile" was never created
2225
pass
2226
del pidfilename
2227
1118
2228
signal.signal(signal.SIGINT, signal.SIG_IGN)
2229
1119
2230
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1120
2231
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1121
2232
1122
2233
if use_dbus:
1123
class MandosServer(dbus.service.Object):
2234
class MandosDBusService(dbus.service.Object):
1124
2235
"""A D-Bus proxy object"""
1125
2236
def __init__(self):
1126
2237
dbus.service.Object.__init__(self, bus, "/")
1127
_interface = u"se.bsnet.fukt.Mandos"
1128
1129
@dbus.service.signal(_interface, signature="oa{sv}")
1130
def ClientAdded(self, objpath, properties):
2238
_interface = "se.recompile.Mandos"
2239
2240
@dbus.service.signal(_interface, signature="o")
2241
def ClientAdded(self, objpath):
2242
"D-Bus signal"
2243
pass
2244
2245
@dbus.service.signal(_interface, signature="ss")
2246
def ClientNotFound(self, fingerprint, address):
1131
2247
"D-Bus signal"
1132
2248
pass
1133
2249
1139
2255
@dbus.service.method(_interface, out_signature="ao")
1140
2256
def GetAllClients(self):
1141
2257
"D-Bus method"
1142
return dbus.Array(c.dbus_object_path for c in clients)
2258
return dbus.Array(c.dbus_object_path
2259
for c in
2260
tcp_server.clients.itervalues())
1143
2261
1144
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2262
@dbus.service.method(_interface,
2263
out_signature="a{oa{sv}}")
1145
2264
def GetAllClientsWithProperties(self):
1146
2265
"D-Bus method"
1147
2266
return dbus.Dictionary(
1148
((c.dbus_object_path, c.GetAllProperties())
1149
for c in clients),
2267
((c.dbus_object_path, c.GetAll(""))
2268
for c in tcp_server.clients.itervalues()),
1150
2269
signature="oa{sv}")
1151
2270
1152
2271
@dbus.service.method(_interface, in_signature="o")
1153
2272
def RemoveClient(self, object_path):
1154
2273
"D-Bus method"
1155
for c in clients:
2274
for c in tcp_server.clients.itervalues():
1156
2275
if c.dbus_object_path == object_path:
1157
clients.remove(c)
2276
del tcp_server.clients[c.name]
2277
c.remove_from_connection()
1158
2278
# Don't signal anything except ClientRemoved
1159
c.use_dbus = False
1160
c.disable()
2279
c.disable(quiet=True)
1161
2280
# Emit D-Bus signal
1162
2281
self.ClientRemoved(object_path, c.name)
1163
2282
return
1164
raise KeyError
2283
raise KeyError(object_path)
1165
2284
1166
2285
del _interface
1167
2286
1168
mandos_server = MandosServer()
1169
1170
for client in clients:
2287
class MandosDBusServiceTransitional(MandosDBusService):
2288
__metaclass__ = AlternateDBusNamesMetaclass
2289
mandos_dbus_service = MandosDBusServiceTransitional()
2290
2291
def cleanup():
2292
"Cleanup function; run on exit"
2293
service.cleanup()
2294
2295
multiprocessing.active_children()
2296
if not (tcp_server.clients or client_settings):
2297
return
2298
2299
# Store client before exiting. Secrets are encrypted with key based
2300
# on what config file has. If config file is removed/edited, old
2301
# secret will thus be unrecovable.
2302
clients = []
2303
for client in tcp_server.clients.itervalues():
2304
client.encrypt_secret(client_settings[client.name]["secret"])
2305
2306
client_dict = {}
2307
2308
# A list of attributes that will not be stored when shuting down.
2309
exclude = set(("bus", "changedstate", "secret"))
2310
for name, typ in inspect.getmembers(dbus.service.Object):
2311
exclude.add(name)
2312
2313
client_dict["encrypted_secret"] = client.encrypted_secret
2314
for attr in client.client_structure:
2315
if attr not in exclude:
2316
client_dict[attr] = getattr(client, attr)
2317
2318
clients.append(client_dict)
2319
del client_settings[client.name]["secret"]
2320
2321
try:
2322
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2323
pickle.dump((clients, client_settings), stored_state)
2324
except IOError as e:
2325
logger.warning("Could not save persistant state: {0}".format(e))
2326
if e.errno != errno.ENOENT:
2327
raise
2328
2329
# Delete all clients, and settings from config
2330
while tcp_server.clients:
2331
name, client = tcp_server.clients.popitem()
2332
if use_dbus:
2333
client.remove_from_connection()
2334
# Don't signal anything except ClientRemoved
2335
client.disable(quiet=True)
2336
if use_dbus:
2337
# Emit D-Bus signal
2338
mandos_dbus_service.ClientRemoved(client
2339
.dbus_object_path,
2340
client.name)
2341
client_settings.clear()
2342
2343
atexit.register(cleanup)
2344
2345
for client in tcp_server.clients.itervalues():
1171
2346
if use_dbus:
1172
2347
# Emit D-Bus signal
1173
mandos_server.ClientAdded(client.dbus_object_path,
1174
client.GetAllProperties())
1175
client.enable()
2348
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2349
# Need to initiate checking of clients
2350
if client.enabled:
2351
client.init_checker()
2352
1176
2353
1177
2354
tcp_server.enable()
1178
2355
tcp_server.server_activate()
1179
2356
1180
2357
# Find out what port we got
1181
2358
service.port = tcp_server.socket.getsockname()[1]
1182
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1183
u" scope_id %d" % tcp_server.socket.getsockname())
2359
if use_ipv6:
2360
logger.info("Now listening on address %r, port %d,"
2361
" flowinfo %d, scope_id %d"
2362
% tcp_server.socket.getsockname())
2363
else: # IPv4
2364
logger.info("Now listening on address %r, port %d"
2365
% tcp_server.socket.getsockname())
1184
2366
1185
2367
#service.interface = tcp_server.socket.getsockname()[3]
1186
2368
1187
2369
try:
1188
2370
# From the Avahi example code
1189
server.connect_to_signal("StateChanged", server_state_changed)
1190
2371
try:
1191
server_state_changed(server.GetState())
1192
except dbus.exceptions.DBusException, error:
1193
logger.critical(u"DBusException: %s", error)
2372
service.activate()
2373
except dbus.exceptions.DBusException as error:
2374
logger.critical("DBusException: %s", error)
2375
cleanup()
1194
2376
sys.exit(1)
1195
2377
# End of Avahi example code
1196
2378
1199
2381
(tcp_server.handle_request
1200
2382
(*args[2:], **kwargs) or True))
1201
2383
1202
logger.debug(u"Starting main loop")
2384
logger.debug("Starting main loop")
1203
2385
main_loop.run()
1204
except AvahiError, error:
1205
logger.critical(u"AvahiError: %s", error)
2386
except AvahiError as error:
2387
logger.critical("AvahiError: %s", error)
2388
cleanup()
1206
2389
sys.exit(1)
1207
2390
except KeyboardInterrupt:
1208
2391
if debug:
1209
print >> sys.stderr
2392
print("", file=sys.stderr)
1210
2393
logger.debug("Server received KeyboardInterrupt")
1211
2394
logger.debug("Server exiting")
2395
# Must run before the D-Bus bus name gets deregistered
2396
cleanup()
2397
1212
2398
1213
2399
if __name__ == '__main__':
1214
2400
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0