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- Committer: Björn Påhlsson
- Date: 2011-11-09 11:16:17 UTC
- mto: (518.2.5 persistent-state-gpgme)
- mto: This revision was merged to the branch mainline in revision 520.
- Revision ID: belorn@fukt.bsnet.se-20111109111617-jpey2sy4dupqzabc
Persistent state: New feature. Client state is now stored when mandos
server exits, and restored when starting up. Secrets
are encrypted with key based on clients config file.
--no-restore: New argument to mandos server. Disables restore
functionallity
minor changes: clients are now dicts!
server exits, and restored when starting up. Secrets
are encrypted with key based on clients config file.
--no-restore: New argument to mandos server. Disables restore
functionallity
minor changes: clients are now dicts!
- 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
#
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13
# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
16
16
#
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# 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
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
30
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#
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
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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
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
stored_state_path = "/var/lib/mandos/clients.pickle"
91
92
#logger = logging.getLogger('mandos')
71
93
logger = logging.Logger('mandos')
72
94
syslogger = (logging.handlers.SysLogHandler
73
95
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
96
address = str("/dev/log")))
75
97
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
98
('Mandos [%(process)d]: %(levelname)s:'
99
' %(message)s'))
77
100
logger.addHandler(syslogger)
78
101
79
102
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
103
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
104
' %(levelname)s:'
81
105
' %(message)s'))
82
106
logger.addHandler(console)
83
107
97
121
98
122
class AvahiService(object):
99
123
"""An Avahi (Zeroconf) service.
124
100
125
Attributes:
101
126
interface: integer; avahi.IF_UNSPEC or an interface index.
102
127
Used to optionally bind to the specified interface.
110
135
max_renames: integer; maximum number of renames
111
136
rename_count: integer; counter so we only rename after collisions
112
137
a sensible number of times
138
group: D-Bus Entry Group
139
server: D-Bus Server
140
bus: dbus.SystemBus()
113
141
"""
114
142
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
143
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
144
domain = "", host = "", max_renames = 32768,
145
protocol = avahi.PROTO_UNSPEC, bus = None):
117
146
self.interface = interface
118
147
self.name = name
119
148
self.type = servicetype
123
152
self.host = host
124
153
self.rename_count = 0
125
154
self.max_renames = max_renames
155
self.protocol = protocol
156
self.group = None # our entry group
157
self.server = None
158
self.bus = bus
159
self.entry_group_state_changed_match = None
126
160
def rename(self):
127
161
"""Derived from the Avahi example code"""
128
162
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
163
logger.critical("No suitable Zeroconf service name found"
164
" after %i retries, exiting.",
131
165
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
166
raise AvahiServiceError("Too many renames")
167
self.name = unicode(self.server
168
.GetAlternativeServiceName(self.name))
169
logger.info("Changing Zeroconf service name to %r ...",
170
self.name)
136
171
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
172
('Mandos (%s) [%%(process)d]:'
173
' %%(levelname)s: %%(message)s'
174
% self.name))
139
175
self.remove()
140
self.add()
176
try:
177
self.add()
178
except dbus.exceptions.DBusException as error:
179
logger.critical("DBusException: %s", error)
180
self.cleanup()
181
os._exit(1)
141
182
self.rename_count += 1
142
183
def remove(self):
143
184
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
185
if self.entry_group_state_changed_match is not None:
186
self.entry_group_state_changed_match.remove()
187
self.entry_group_state_changed_match = None
188
if self.group is not None:
189
self.group.Reset()
146
190
def add(self):
147
191
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
192
self.remove()
193
if self.group is None:
194
self.group = dbus.Interface(
195
self.bus.get_object(avahi.DBUS_NAME,
196
self.server.EntryGroupNew()),
197
avahi.DBUS_INTERFACE_ENTRY_GROUP)
198
self.entry_group_state_changed_match = (
199
self.group.connect_to_signal(
200
'StateChanged', self .entry_group_state_changed))
201
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
202
self.name, self.type)
203
self.group.AddService(
204
self.interface,
205
self.protocol,
206
dbus.UInt32(0), # flags
207
self.name, self.type,
208
self.domain, self.host,
209
dbus.UInt16(self.port),
210
avahi.string_array_to_txt_array(self.TXT))
211
self.group.Commit()
212
def entry_group_state_changed(self, state, error):
213
"""Derived from the Avahi example code"""
214
logger.debug("Avahi entry group state change: %i", state)
215
216
if state == avahi.ENTRY_GROUP_ESTABLISHED:
217
logger.debug("Zeroconf service established.")
218
elif state == avahi.ENTRY_GROUP_COLLISION:
219
logger.info("Zeroconf service name collision.")
220
self.rename()
221
elif state == avahi.ENTRY_GROUP_FAILURE:
222
logger.critical("Avahi: Error in group state changed %s",
223
unicode(error))
224
raise AvahiGroupError("State changed: %s"
225
% unicode(error))
226
def cleanup(self):
227
"""Derived from the Avahi example code"""
228
if self.group is not None:
229
try:
230
self.group.Free()
231
except (dbus.exceptions.UnknownMethodException,
232
dbus.exceptions.DBusException) as e:
233
pass
234
self.group = None
235
self.remove()
236
def server_state_changed(self, state, error=None):
237
"""Derived from the Avahi example code"""
238
logger.debug("Avahi server state change: %i", state)
239
bad_states = { avahi.SERVER_INVALID:
240
"Zeroconf server invalid",
241
avahi.SERVER_REGISTERING: None,
242
avahi.SERVER_COLLISION:
243
"Zeroconf server name collision",
244
avahi.SERVER_FAILURE:
245
"Zeroconf server failure" }
246
if state in bad_states:
247
if bad_states[state] is not None:
248
if error is None:
249
logger.error(bad_states[state])
250
else:
251
logger.error(bad_states[state] + ": %r", error)
252
self.cleanup()
253
elif state == avahi.SERVER_RUNNING:
254
self.add()
255
else:
256
if error is None:
257
logger.debug("Unknown state: %r", state)
258
else:
259
logger.debug("Unknown state: %r: %r", state, error)
260
def activate(self):
261
"""Derived from the Avahi example code"""
262
if self.server is None:
263
self.server = dbus.Interface(
264
self.bus.get_object(avahi.DBUS_NAME,
265
avahi.DBUS_PATH_SERVER,
266
follow_name_owner_changes=True),
267
avahi.DBUS_INTERFACE_SERVER)
268
self.server.connect_to_signal("StateChanged",
269
self.server_state_changed)
270
self.server_state_changed(self.server.GetState())
271
272
273
def _timedelta_to_milliseconds(td):
274
"Convert a datetime.timedelta() to milliseconds"
275
return ((td.days * 24 * 60 * 60 * 1000)
276
+ (td.seconds * 1000)
277
+ (td.microseconds // 1000))
278
279
class Client(object):
179
280
"""A representation of a client host served by this server.
281
180
282
Attributes:
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
283
_approved: bool(); 'None' if not yet approved/disapproved
284
approval_delay: datetime.timedelta(); Time to wait for approval
285
approval_duration: datetime.timedelta(); Duration of one approval
286
checker: subprocess.Popen(); a running checker process used
287
to see if the client lives.
288
'None' if no process is running.
289
checker_callback_tag: a gobject event source tag, or None
290
checker_command: string; External command which is run to check
291
if client lives. %() expansions are done at
292
runtime with vars(self) as dict, so that for
293
instance %(name)s can be used in the command.
294
checker_initiator_tag: a gobject event source tag, or None
295
created: datetime.datetime(); (UTC) object creation
296
client_structure: Object describing what attributes a client has
297
and is used for storing the client at exit
298
current_checker_command: string; current running checker_command
299
disable_initiator_tag: a gobject event source tag, or None
300
enabled: bool()
183
301
fingerprint: string (40 or 32 hexadecimal digits); used to
184
302
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
303
host: string; available for use by the checker command
187
created: datetime.datetime(); (UTC) object creation
304
interval: datetime.timedelta(); How often to start a new checker
305
last_approval_request: datetime.datetime(); (UTC) or None
306
last_checked_ok: datetime.datetime(); (UTC) or None
307
Last_checker_status: integer between 0 and 255 reflecting exit status
308
of last checker. -1 reflect crashed checker.
188
309
last_enabled: datetime.datetime(); (UTC)
189
enabled: bool()
190
last_checked_ok: datetime.datetime(); (UTC) or None
310
name: string; from the config file, used in log messages and
311
D-Bus identifiers
312
secret: bytestring; sent verbatim (over TLS) to client
191
313
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
198
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
200
checker_callback_tag: - '' -
201
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
203
runtime with vars(self) as dict, so that for
204
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
314
until this client is disabled
315
extended_timeout: extra long timeout when password has been sent
316
runtime_expansions: Allowed attributes for runtime expansion.
317
expires: datetime.datetime(); time (UTC) when a client will be
318
disabled, or None
207
319
"""
320
321
runtime_expansions = ("approval_delay", "approval_duration",
322
"created", "enabled", "fingerprint",
323
"host", "interval", "last_checked_ok",
324
"last_enabled", "name", "timeout")
325
208
326
def timeout_milliseconds(self):
209
327
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
328
return _timedelta_to_milliseconds(self.timeout)
329
330
def extended_timeout_milliseconds(self):
331
"Return the 'extended_timeout' attribute in milliseconds"
332
return _timedelta_to_milliseconds(self.extended_timeout)
213
333
214
334
def interval_milliseconds(self):
215
335
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
219
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
336
return _timedelta_to_milliseconds(self.interval)
337
338
def approval_delay_milliseconds(self):
339
return _timedelta_to_milliseconds(self.approval_delay)
340
341
def __init__(self, name = None, config=None):
222
342
"""Note: the 'checker' key in 'config' sets the
223
343
'checker_command' attribute and *not* the 'checker'
224
344
attribute."""
225
345
self.name = name
226
346
if config is None:
227
347
config = {}
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
348
logger.debug("Creating client %r", self.name)
230
349
# Uppercase and remove spaces from fingerprint for later
231
350
# comparison purposes with return value from the fingerprint()
232
351
# function
233
352
self.fingerprint = (config["fingerprint"].upper()
234
.replace(u" ", u""))
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
353
.replace(" ", ""))
354
logger.debug(" Fingerprint: %s", self.fingerprint)
236
355
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
356
self.secret = config["secret"].decode("base64")
238
357
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
358
with open(os.path.expanduser(os.path.expandvars
359
(config["secfile"])),
360
"rb") as secfile:
242
361
self.secret = secfile.read()
243
362
else:
244
raise TypeError(u"No secret or secfile for client %s"
363
raise TypeError("No secret or secfile for client %s"
245
364
% self.name)
246
365
self.host = config.get("host", "")
247
366
self.created = datetime.datetime.utcnow()
248
self.enabled = False
249
self.last_enabled = None
367
self.enabled = True
368
self.last_approval_request = None
369
self.last_enabled = datetime.datetime.utcnow()
250
370
self.last_checked_ok = None
371
self.last_checker_status = 0
251
372
self.timeout = string_to_delta(config["timeout"])
373
self.extended_timeout = string_to_delta(config
374
["extended_timeout"])
252
375
self.interval = string_to_delta(config["interval"])
253
self.disable_hook = disable_hook
254
376
self.checker = None
255
377
self.checker_initiator_tag = None
256
378
self.disable_initiator_tag = None
379
self.expires = datetime.datetime.utcnow() + self.timeout
257
380
self.checker_callback_tag = None
258
381
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
382
self.current_checker_command = None
383
self._approved = None
384
self.approved_by_default = config.get("approved_by_default",
385
True)
386
self.approvals_pending = 0
387
self.approval_delay = string_to_delta(
388
config["approval_delay"])
389
self.approval_duration = string_to_delta(
390
config["approval_duration"])
391
self.changedstate = (multiprocessing_manager
392
.Condition(multiprocessing_manager
393
.Lock()))
394
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
395
self.client_structure.append("client_structure")
396
397
398
for name, t in inspect.getmembers(type(self),
399
lambda obj: isinstance(obj, property)):
400
if not name.startswith("_"):
401
self.client_structure.append(name)
402
403
404
def send_changedstate(self):
405
self.changedstate.acquire()
406
self.changedstate.notify_all()
407
self.changedstate.release()
269
408
270
409
def enable(self):
271
410
"""Start this client's checker and timeout hooks"""
411
if getattr(self, "enabled", False):
412
# Already enabled
413
return
414
self.send_changedstate()
415
self.expires = datetime.datetime.utcnow() + self.timeout
416
self.enabled = True
272
417
self.last_enabled = datetime.datetime.utcnow()
273
# Schedule a new checker to be started an 'interval' from now,
274
# and every interval from then on.
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
277
self.start_checker))
278
# Also start a new checker *right now*.
279
self.start_checker()
280
# Schedule a disable() when 'timeout' has passed
281
self.disable_initiator_tag = (gobject.timeout_add
282
(self.timeout_milliseconds(),
283
self.disable))
284
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
418
self.init_checker()
292
419
293
def disable(self):
420
def disable(self, quiet=True):
294
421
"""Disable this client."""
295
422
if not getattr(self, "enabled", False):
296
423
return False
297
logger.info(u"Disabling client %s", self.name)
424
if not quiet:
425
self.send_changedstate()
426
if not quiet:
427
logger.info("Disabling client %s", self.name)
298
428
if getattr(self, "disable_initiator_tag", False):
299
429
gobject.source_remove(self.disable_initiator_tag)
300
430
self.disable_initiator_tag = None
431
self.expires = None
301
432
if getattr(self, "checker_initiator_tag", False):
302
433
gobject.source_remove(self.checker_initiator_tag)
303
434
self.checker_initiator_tag = None
304
435
self.stop_checker()
305
if self.disable_hook:
306
self.disable_hook(self)
307
436
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
312
437
# Do not run this again if called by a gobject.timeout_add
313
438
return False
314
439
315
440
def __del__(self):
316
self.disable_hook = None
317
441
self.disable()
318
442
443
def init_checker(self):
444
# Schedule a new checker to be started an 'interval' from now,
445
# and every interval from then on.
446
self.checker_initiator_tag = (gobject.timeout_add
447
(self.interval_milliseconds(),
448
self.start_checker))
449
# Schedule a disable() when 'timeout' has passed
450
self.disable_initiator_tag = (gobject.timeout_add
451
(self.timeout_milliseconds(),
452
self.disable))
453
# Also start a new checker *right now*.
454
self.start_checker()
455
456
319
457
def checker_callback(self, pid, condition, command):
320
458
"""The checker has completed, so take appropriate actions."""
321
459
self.checker_callback_tag = None
322
460
self.checker = None
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
461
if os.WIFEXITED(condition):
328
exitstatus = os.WEXITSTATUS(condition)
329
if exitstatus == 0:
330
logger.info(u"Checker for %(name)s succeeded",
462
self.last_checker_status = os.WEXITSTATUS(condition)
463
if self.last_checker_status == 0:
464
logger.info("Checker for %(name)s succeeded",
331
465
vars(self))
332
466
self.checked_ok()
333
467
else:
334
logger.info(u"Checker for %(name)s failed",
468
logger.info("Checker for %(name)s failed",
335
469
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
341
470
else:
342
logger.warning(u"Checker for %(name)s crashed?",
471
self.last_checker_status = -1
472
logger.warning("Checker for %(name)s crashed?",
343
473
vars(self))
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
474
350
def checked_ok(self):
475
def checked_ok(self, timeout=None):
351
476
"""Bump up the timeout for this client.
477
352
478
This should only be called when the client has been seen,
353
479
alive and well.
354
480
"""
481
if timeout is None:
482
timeout = self.timeout
355
483
self.last_checked_ok = datetime.datetime.utcnow()
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
484
if self.disable_initiator_tag is not None:
485
gobject.source_remove(self.disable_initiator_tag)
486
if getattr(self, "enabled", False):
487
self.disable_initiator_tag = (gobject.timeout_add
488
(_timedelta_to_milliseconds
489
(timeout), self.disable))
490
self.expires = datetime.datetime.utcnow() + timeout
491
492
def need_approval(self):
493
self.last_approval_request = datetime.datetime.utcnow()
366
494
367
495
def start_checker(self):
368
496
"""Start a new checker subprocess if one is not running.
497
369
498
If a checker already exists, leave it running and do
370
499
nothing."""
371
500
# The reason for not killing a running checker is that if we
374
503
# client would inevitably timeout, since no checker would get
375
504
# a chance to run to completion. If we instead leave running
376
505
# checkers alone, the checker would have to take more time
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
506
# than 'timeout' for the client to be disabled, which is as it
507
# should be.
508
509
# If a checker exists, make sure it is not a zombie
510
try:
511
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
512
except (AttributeError, OSError) as error:
513
if (isinstance(error, OSError)
514
and error.errno != errno.ECHILD):
515
raise error
516
else:
517
if pid:
518
logger.warning("Checker was a zombie")
519
gobject.source_remove(self.checker_callback_tag)
520
self.checker_callback(pid, status,
521
self.current_checker_command)
522
# Start a new checker if needed
379
523
if self.checker is None:
380
524
try:
381
525
# In case checker_command has exactly one % operator
382
526
command = self.checker_command % self.host
383
527
except TypeError:
384
528
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
386
for key, val in
387
vars(self).iteritems())
529
escaped_attrs = dict(
530
(attr,
531
re.escape(unicode(str(getattr(self, attr, "")),
532
errors=
533
'replace')))
534
for attr in
535
self.runtime_expansions)
536
388
537
try:
389
538
command = self.checker_command % escaped_attrs
390
except TypeError, error:
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
539
except TypeError as error:
540
logger.error('Could not format string "%s":'
541
' %s', self.checker_command, error)
393
542
return True # Try again later
543
self.current_checker_command = command
394
544
try:
395
logger.info(u"Starting checker %r for %s",
545
logger.info("Starting checker %r for %s",
396
546
command, self.name)
397
547
# We don't need to redirect stdout and stderr, since
398
548
# in normal mode, that is already done by daemon(),
401
551
self.checker = subprocess.Popen(command,
402
552
close_fds=True,
403
553
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
554
self.checker_callback_tag = (gobject.child_watch_add
411
555
(self.checker.pid,
412
556
self.checker_callback,
413
557
data=command))
414
except OSError, error:
415
logger.error(u"Failed to start subprocess: %s",
558
# The checker may have completed before the gobject
559
# watch was added. Check for this.
560
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
561
if pid:
562
gobject.source_remove(self.checker_callback_tag)
563
self.checker_callback(pid, status, command)
564
except OSError as error:
565
logger.error("Failed to start subprocess: %s",
416
566
error)
417
567
# Re-run this periodically if run by gobject.timeout_add
418
568
return True
424
574
self.checker_callback_tag = None
425
575
if getattr(self, "checker", None) is None:
426
576
return
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
577
logger.debug("Stopping checker for %(name)s", vars(self))
428
578
try:
429
579
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
580
#time.sleep(0.5)
431
581
#if self.checker.poll() is None:
432
582
# os.kill(self.checker.pid, signal.SIGKILL)
433
except OSError, error:
583
except OSError as error:
434
584
if error.errno != errno.ESRCH: # No such process
435
585
raise
436
586
self.checker = None
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
def still_valid(self):
442
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
447
return now < (self.created + self.timeout)
448
else:
449
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"se.bsnet.fukt.Mandos.Client"
453
454
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
587
588
# Encrypts a client secret and stores it in a varible encrypted_secret
589
def encrypt_secret(self, key):
590
# Encryption-key need to be specific size, so we hash inputed key
591
hasheng = hashlib.sha256()
592
hasheng.update(key)
593
encryptionkey = hasheng.digest()
594
595
# Create validation hash so we know at decryption if it was sucessful
596
hasheng = hashlib.sha256()
597
hasheng.update(self.secret)
598
validationhash = hasheng.digest()
599
600
# Encrypt secret
601
iv = os.urandom(Crypto.Cipher.AES.block_size)
602
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
603
Crypto.Cipher.AES.MODE_CFB, iv)
604
ciphertext = ciphereng.encrypt(validationhash+self.secret)
605
self.encrypted_secret = (ciphertext, iv)
606
607
# Decrypt a encrypted client secret
608
def decrypt_secret(self, key):
609
# Decryption-key need to be specific size, so we hash inputed key
610
hasheng = hashlib.sha256()
611
hasheng.update(key)
612
encryptionkey = hasheng.digest()
613
614
# Decrypt encrypted secret
615
ciphertext, iv = self.encrypted_secret
616
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
617
Crypto.Cipher.AES.MODE_CFB, iv)
618
plain = ciphereng.decrypt(ciphertext)
619
620
# Validate decrypted secret to know if it was succesful
621
hasheng = hashlib.sha256()
622
validationhash = plain[:hasheng.digest_size]
623
secret = plain[hasheng.digest_size:]
624
hasheng.update(secret)
625
626
# if validation fails, we use key as new secret. Otherwhise, we use
627
# the decrypted secret
628
if hasheng.digest() == validationhash:
629
self.secret = secret
630
else:
631
self.secret = key
632
del self.encrypted_secret
633
634
635
def dbus_service_property(dbus_interface, signature="v",
636
access="readwrite", byte_arrays=False):
637
"""Decorators for marking methods of a DBusObjectWithProperties to
638
become properties on the D-Bus.
639
640
The decorated method will be called with no arguments by "Get"
641
and with one argument by "Set".
642
643
The parameters, where they are supported, are the same as
644
dbus.service.method, except there is only "signature", since the
645
type from Get() and the type sent to Set() is the same.
646
"""
647
# Encoding deeply encoded byte arrays is not supported yet by the
648
# "Set" method, so we fail early here:
649
if byte_arrays and signature != "ay":
650
raise ValueError("Byte arrays not supported for non-'ay'"
651
" signature %r" % signature)
652
def decorator(func):
653
func._dbus_is_property = True
654
func._dbus_interface = dbus_interface
655
func._dbus_signature = signature
656
func._dbus_access = access
657
func._dbus_name = func.__name__
658
if func._dbus_name.endswith("_dbus_property"):
659
func._dbus_name = func._dbus_name[:-14]
660
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
661
return func
662
return decorator
663
664
665
class DBusPropertyException(dbus.exceptions.DBusException):
666
"""A base class for D-Bus property-related exceptions
667
"""
668
def __unicode__(self):
669
return unicode(str(self))
670
671
672
class DBusPropertyAccessException(DBusPropertyException):
673
"""A property's access permissions disallows an operation.
674
"""
675
pass
676
677
678
class DBusPropertyNotFound(DBusPropertyException):
679
"""An attempt was made to access a non-existing property.
680
"""
681
pass
682
683
684
class DBusObjectWithProperties(dbus.service.Object):
685
"""A D-Bus object with properties.
686
687
Classes inheriting from this can use the dbus_service_property
688
decorator to expose methods as D-Bus properties. It exposes the
689
standard Get(), Set(), and GetAll() methods on the D-Bus.
690
"""
691
692
@staticmethod
693
def _is_dbus_property(obj):
694
return getattr(obj, "_dbus_is_property", False)
695
696
def _get_all_dbus_properties(self):
697
"""Returns a generator of (name, attribute) pairs
698
"""
699
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
700
for cls in self.__class__.__mro__
701
for name, prop in
702
inspect.getmembers(cls, self._is_dbus_property))
703
704
def _get_dbus_property(self, interface_name, property_name):
705
"""Returns a bound method if one exists which is a D-Bus
706
property with the specified name and interface.
707
"""
708
for cls in self.__class__.__mro__:
709
for name, value in (inspect.getmembers
710
(cls, self._is_dbus_property)):
711
if (value._dbus_name == property_name
712
and value._dbus_interface == interface_name):
713
return value.__get__(self)
714
715
# No such property
716
raise DBusPropertyNotFound(self.dbus_object_path + ":"
717
+ interface_name + "."
718
+ property_name)
719
720
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
721
out_signature="v")
722
def Get(self, interface_name, property_name):
723
"""Standard D-Bus property Get() method, see D-Bus standard.
724
"""
725
prop = self._get_dbus_property(interface_name, property_name)
726
if prop._dbus_access == "write":
727
raise DBusPropertyAccessException(property_name)
728
value = prop()
729
if not hasattr(value, "variant_level"):
730
return value
731
return type(value)(value, variant_level=value.variant_level+1)
732
733
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
734
def Set(self, interface_name, property_name, value):
735
"""Standard D-Bus property Set() method, see D-Bus standard.
736
"""
737
prop = self._get_dbus_property(interface_name, property_name)
738
if prop._dbus_access == "read":
739
raise DBusPropertyAccessException(property_name)
740
if prop._dbus_get_args_options["byte_arrays"]:
741
# The byte_arrays option is not supported yet on
742
# signatures other than "ay".
743
if prop._dbus_signature != "ay":
744
raise ValueError
745
value = dbus.ByteArray(''.join(unichr(byte)
746
for byte in value))
747
prop(value)
748
749
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
750
out_signature="a{sv}")
751
def GetAll(self, interface_name):
752
"""Standard D-Bus property GetAll() method, see D-Bus
753
standard.
754
755
Note: Will not include properties with access="write".
756
"""
757
all = {}
758
for name, prop in self._get_all_dbus_properties():
759
if (interface_name
760
and interface_name != prop._dbus_interface):
761
# Interface non-empty but did not match
762
continue
763
# Ignore write-only properties
764
if prop._dbus_access == "write":
765
continue
766
value = prop()
767
if not hasattr(value, "variant_level"):
768
all[name] = value
769
continue
770
all[name] = type(value)(value, variant_level=
771
value.variant_level+1)
772
return dbus.Dictionary(all, signature="sv")
773
774
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
775
out_signature="s",
776
path_keyword='object_path',
777
connection_keyword='connection')
778
def Introspect(self, object_path, connection):
779
"""Standard D-Bus method, overloaded to insert property tags.
780
"""
781
xmlstring = dbus.service.Object.Introspect(self, object_path,
782
connection)
783
try:
784
document = xml.dom.minidom.parseString(xmlstring)
785
def make_tag(document, name, prop):
786
e = document.createElement("property")
787
e.setAttribute("name", name)
788
e.setAttribute("type", prop._dbus_signature)
789
e.setAttribute("access", prop._dbus_access)
790
return e
791
for if_tag in document.getElementsByTagName("interface"):
792
for tag in (make_tag(document, name, prop)
793
for name, prop
794
in self._get_all_dbus_properties()
795
if prop._dbus_interface
796
== if_tag.getAttribute("name")):
797
if_tag.appendChild(tag)
798
# Add the names to the return values for the
799
# "org.freedesktop.DBus.Properties" methods
800
if (if_tag.getAttribute("name")
801
== "org.freedesktop.DBus.Properties"):
802
for cn in if_tag.getElementsByTagName("method"):
803
if cn.getAttribute("name") == "Get":
804
for arg in cn.getElementsByTagName("arg"):
805
if (arg.getAttribute("direction")
806
== "out"):
807
arg.setAttribute("name", "value")
808
elif cn.getAttribute("name") == "GetAll":
809
for arg in cn.getElementsByTagName("arg"):
810
if (arg.getAttribute("direction")
811
== "out"):
812
arg.setAttribute("name", "props")
813
xmlstring = document.toxml("utf-8")
814
document.unlink()
815
except (AttributeError, xml.dom.DOMException,
816
xml.parsers.expat.ExpatError) as error:
817
logger.error("Failed to override Introspection method",
818
error)
819
return xmlstring
820
821
822
def datetime_to_dbus (dt, variant_level=0):
823
"""Convert a UTC datetime.datetime() to a D-Bus type."""
824
if dt is None:
825
return dbus.String("", variant_level = variant_level)
826
return dbus.String(dt.isoformat(),
827
variant_level=variant_level)
828
829
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
830
.__metaclass__):
831
"""Applied to an empty subclass of a D-Bus object, this metaclass
832
will add additional D-Bus attributes matching a certain pattern.
833
"""
834
def __new__(mcs, name, bases, attr):
835
# Go through all the base classes which could have D-Bus
836
# methods, signals, or properties in them
837
for base in (b for b in bases
838
if issubclass(b, dbus.service.Object)):
839
# Go though all attributes of the base class
840
for attrname, attribute in inspect.getmembers(base):
841
# Ignore non-D-Bus attributes, and D-Bus attributes
842
# with the wrong interface name
843
if (not hasattr(attribute, "_dbus_interface")
844
or not attribute._dbus_interface
845
.startswith("se.recompile.Mandos")):
846
continue
847
# Create an alternate D-Bus interface name based on
848
# the current name
849
alt_interface = (attribute._dbus_interface
850
.replace("se.recompile.Mandos",
851
"se.bsnet.fukt.Mandos"))
852
# Is this a D-Bus signal?
853
if getattr(attribute, "_dbus_is_signal", False):
854
# Extract the original non-method function by
855
# black magic
856
nonmethod_func = (dict(
857
zip(attribute.func_code.co_freevars,
858
attribute.__closure__))["func"]
859
.cell_contents)
860
# Create a new, but exactly alike, function
861
# object, and decorate it to be a new D-Bus signal
862
# with the alternate D-Bus interface name
863
new_function = (dbus.service.signal
864
(alt_interface,
865
attribute._dbus_signature)
866
(types.FunctionType(
867
nonmethod_func.func_code,
868
nonmethod_func.func_globals,
869
nonmethod_func.func_name,
870
nonmethod_func.func_defaults,
871
nonmethod_func.func_closure)))
872
# Define a creator of a function to call both the
873
# old and new functions, so both the old and new
874
# signals gets sent when the function is called
875
def fixscope(func1, func2):
876
"""This function is a scope container to pass
877
func1 and func2 to the "call_both" function
878
outside of its arguments"""
879
def call_both(*args, **kwargs):
880
"""This function will emit two D-Bus
881
signals by calling func1 and func2"""
882
func1(*args, **kwargs)
883
func2(*args, **kwargs)
884
return call_both
885
# Create the "call_both" function and add it to
886
# the class
887
attr[attrname] = fixscope(attribute,
888
new_function)
889
# Is this a D-Bus method?
890
elif getattr(attribute, "_dbus_is_method", False):
891
# Create a new, but exactly alike, function
892
# object. Decorate it to be a new D-Bus method
893
# with the alternate D-Bus interface name. Add it
894
# to the class.
895
attr[attrname] = (dbus.service.method
896
(alt_interface,
897
attribute._dbus_in_signature,
898
attribute._dbus_out_signature)
899
(types.FunctionType
900
(attribute.func_code,
901
attribute.func_globals,
902
attribute.func_name,
903
attribute.func_defaults,
904
attribute.func_closure)))
905
# Is this a D-Bus property?
906
elif getattr(attribute, "_dbus_is_property", False):
907
# Create a new, but exactly alike, function
908
# object, and decorate it to be a new D-Bus
909
# property with the alternate D-Bus interface
910
# name. Add it to the class.
911
attr[attrname] = (dbus_service_property
912
(alt_interface,
913
attribute._dbus_signature,
914
attribute._dbus_access,
915
attribute
916
._dbus_get_args_options
917
["byte_arrays"])
918
(types.FunctionType
919
(attribute.func_code,
920
attribute.func_globals,
921
attribute.func_name,
922
attribute.func_defaults,
923
attribute.func_closure)))
924
return type.__new__(mcs, name, bases, attr)
925
926
class ClientDBus(Client, DBusObjectWithProperties):
927
"""A Client class using D-Bus
928
929
Attributes:
930
dbus_object_path: dbus.ObjectPath
931
bus: dbus.SystemBus()
932
"""
933
934
runtime_expansions = (Client.runtime_expansions
935
+ ("dbus_object_path",))
936
937
# dbus.service.Object doesn't use super(), so we can't either.
938
939
def __init__(self, bus = None, *args, **kwargs):
940
self.bus = bus
941
Client.__init__(self, *args, **kwargs)
942
943
self._approvals_pending = 0
944
# Only now, when this client is initialized, can it show up on
945
# the D-Bus
946
client_object_name = unicode(self.name).translate(
947
{ord("."): ord("_"),
948
ord("-"): ord("_")})
949
self.dbus_object_path = (dbus.ObjectPath
950
("/clients/" + client_object_name))
951
DBusObjectWithProperties.__init__(self, self.bus,
952
self.dbus_object_path)
953
954
def notifychangeproperty(transform_func,
955
dbus_name, type_func=lambda x: x,
956
variant_level=1):
957
""" Modify a variable so that it's a property which announces
958
its changes to DBus.
959
960
transform_fun: Function that takes a value and a variant_level
961
and transforms it to a D-Bus type.
962
dbus_name: D-Bus name of the variable
963
type_func: Function that transform the value before sending it
964
to the D-Bus. Default: no transform
965
variant_level: D-Bus variant level. Default: 1
966
"""
967
attrname = "_{0}".format(dbus_name)
968
def setter(self, value):
969
if hasattr(self, "dbus_object_path"):
970
if (not hasattr(self, attrname) or
971
type_func(getattr(self, attrname, None))
972
!= type_func(value)):
973
dbus_value = transform_func(type_func(value),
974
variant_level
975
=variant_level)
976
self.PropertyChanged(dbus.String(dbus_name),
977
dbus_value)
978
setattr(self, attrname, value)
979
980
return property(lambda self: getattr(self, attrname), setter)
981
982
983
expires = notifychangeproperty(datetime_to_dbus, "Expires")
984
approvals_pending = notifychangeproperty(dbus.Boolean,
985
"ApprovalPending",
986
type_func = bool)
987
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
988
last_enabled = notifychangeproperty(datetime_to_dbus,
989
"LastEnabled")
990
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
991
type_func = lambda checker:
992
checker is not None)
993
last_checked_ok = notifychangeproperty(datetime_to_dbus,
994
"LastCheckedOK")
995
last_approval_request = notifychangeproperty(
996
datetime_to_dbus, "LastApprovalRequest")
997
approved_by_default = notifychangeproperty(dbus.Boolean,
998
"ApprovedByDefault")
999
approval_delay = notifychangeproperty(dbus.UInt16,
1000
"ApprovalDelay",
1001
type_func =
1002
_timedelta_to_milliseconds)
1003
approval_duration = notifychangeproperty(
1004
dbus.UInt16, "ApprovalDuration",
1005
type_func = _timedelta_to_milliseconds)
1006
host = notifychangeproperty(dbus.String, "Host")
1007
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1008
type_func =
1009
_timedelta_to_milliseconds)
1010
extended_timeout = notifychangeproperty(
1011
dbus.UInt16, "ExtendedTimeout",
1012
type_func = _timedelta_to_milliseconds)
1013
interval = notifychangeproperty(dbus.UInt16,
1014
"Interval",
1015
type_func =
1016
_timedelta_to_milliseconds)
1017
checker_command = notifychangeproperty(dbus.String, "Checker")
1018
1019
del notifychangeproperty
1020
1021
def __del__(self, *args, **kwargs):
1022
try:
1023
self.remove_from_connection()
1024
except LookupError:
1025
pass
1026
if hasattr(DBusObjectWithProperties, "__del__"):
1027
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1028
Client.__del__(self, *args, **kwargs)
1029
1030
def checker_callback(self, pid, condition, command,
1031
*args, **kwargs):
1032
self.checker_callback_tag = None
1033
self.checker = None
1034
if os.WIFEXITED(condition):
1035
exitstatus = os.WEXITSTATUS(condition)
1036
# Emit D-Bus signal
1037
self.CheckerCompleted(dbus.Int16(exitstatus),
1038
dbus.Int64(condition),
1039
dbus.String(command))
1040
else:
1041
# Emit D-Bus signal
1042
self.CheckerCompleted(dbus.Int16(-1),
1043
dbus.Int64(condition),
1044
dbus.String(command))
1045
1046
return Client.checker_callback(self, pid, condition, command,
1047
*args, **kwargs)
1048
1049
def start_checker(self, *args, **kwargs):
1050
old_checker = self.checker
1051
if self.checker is not None:
1052
old_checker_pid = self.checker.pid
1053
else:
1054
old_checker_pid = None
1055
r = Client.start_checker(self, *args, **kwargs)
1056
# Only if new checker process was started
1057
if (self.checker is not None
1058
and old_checker_pid != self.checker.pid):
1059
# Emit D-Bus signal
1060
self.CheckerStarted(self.current_checker_command)
1061
return r
1062
1063
def _reset_approved(self):
1064
self._approved = None
1065
return False
1066
1067
def approve(self, value=True):
1068
self.send_changedstate()
1069
self._approved = value
1070
gobject.timeout_add(_timedelta_to_milliseconds
1071
(self.approval_duration),
1072
self._reset_approved)
1073
1074
1075
## D-Bus methods, signals & properties
1076
_interface = "se.recompile.Mandos.Client"
1077
1078
## Signals
457
1079
458
1080
# CheckerCompleted - signal
459
1081
@dbus.service.signal(_interface, signature="nxs")
467
1089
"D-Bus signal"
468
1090
pass
469
1091
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
1092
# PropertyChanged - signal
518
1093
@dbus.service.signal(_interface, signature="sv")
519
1094
def PropertyChanged(self, property, value):
520
1095
"D-Bus signal"
521
1096
pass
522
1097
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
1098
# GotSecret - signal
1099
@dbus.service.signal(_interface)
1100
def GotSecret(self):
1101
"""D-Bus signal
1102
Is sent after a successful transfer of secret from the Mandos
1103
server to mandos-client
1104
"""
1105
pass
1106
1107
# Rejected - signal
1108
@dbus.service.signal(_interface, signature="s")
1109
def Rejected(self, reason):
1110
"D-Bus signal"
1111
pass
1112
1113
# NeedApproval - signal
1114
@dbus.service.signal(_interface, signature="tb")
1115
def NeedApproval(self, timeout, default):
1116
"D-Bus signal"
1117
return self.need_approval()
1118
1119
## Methods
1120
1121
# Approve - method
1122
@dbus.service.method(_interface, in_signature="b")
1123
def Approve(self, value):
1124
self.approve(value)
1125
1126
# CheckedOK - method
1127
@dbus.service.method(_interface)
1128
def CheckedOK(self):
1129
self.checked_ok()
566
1130
567
1131
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
1132
@dbus.service.method(_interface)
1133
def Enable(self):
1134
"D-Bus method"
1135
self.enable()
570
1136
571
1137
# StartChecker - method
572
1138
@dbus.service.method(_interface)
581
1147
self.disable()
582
1148
583
1149
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
1150
@dbus.service.method(_interface)
1151
def StopChecker(self):
1152
self.stop_checker()
1153
1154
## Properties
1155
1156
# ApprovalPending - property
1157
@dbus_service_property(_interface, signature="b", access="read")
1158
def ApprovalPending_dbus_property(self):
1159
return dbus.Boolean(bool(self.approvals_pending))
1160
1161
# ApprovedByDefault - property
1162
@dbus_service_property(_interface, signature="b",
1163
access="readwrite")
1164
def ApprovedByDefault_dbus_property(self, value=None):
1165
if value is None: # get
1166
return dbus.Boolean(self.approved_by_default)
1167
self.approved_by_default = bool(value)
1168
1169
# ApprovalDelay - property
1170
@dbus_service_property(_interface, signature="t",
1171
access="readwrite")
1172
def ApprovalDelay_dbus_property(self, value=None):
1173
if value is None: # get
1174
return dbus.UInt64(self.approval_delay_milliseconds())
1175
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1176
1177
# ApprovalDuration - property
1178
@dbus_service_property(_interface, signature="t",
1179
access="readwrite")
1180
def ApprovalDuration_dbus_property(self, value=None):
1181
if value is None: # get
1182
return dbus.UInt64(_timedelta_to_milliseconds(
1183
self.approval_duration))
1184
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1185
1186
# Name - property
1187
@dbus_service_property(_interface, signature="s", access="read")
1188
def Name_dbus_property(self):
1189
return dbus.String(self.name)
1190
1191
# Fingerprint - property
1192
@dbus_service_property(_interface, signature="s", access="read")
1193
def Fingerprint_dbus_property(self):
1194
return dbus.String(self.fingerprint)
1195
1196
# Host - property
1197
@dbus_service_property(_interface, signature="s",
1198
access="readwrite")
1199
def Host_dbus_property(self, value=None):
1200
if value is None: # get
1201
return dbus.String(self.host)
1202
self.host = value
1203
1204
# Created - property
1205
@dbus_service_property(_interface, signature="s", access="read")
1206
def Created_dbus_property(self):
1207
return dbus.String(datetime_to_dbus(self.created))
1208
1209
# LastEnabled - property
1210
@dbus_service_property(_interface, signature="s", access="read")
1211
def LastEnabled_dbus_property(self):
1212
return datetime_to_dbus(self.last_enabled)
1213
1214
# Enabled - property
1215
@dbus_service_property(_interface, signature="b",
1216
access="readwrite")
1217
def Enabled_dbus_property(self, value=None):
1218
if value is None: # get
1219
return dbus.Boolean(self.enabled)
1220
if value:
1221
self.enable()
1222
else:
1223
self.disable()
1224
1225
# LastCheckedOK - property
1226
@dbus_service_property(_interface, signature="s",
1227
access="readwrite")
1228
def LastCheckedOK_dbus_property(self, value=None):
1229
if value is not None:
1230
self.checked_ok()
1231
return
1232
return datetime_to_dbus(self.last_checked_ok)
1233
1234
# Expires - property
1235
@dbus_service_property(_interface, signature="s", access="read")
1236
def Expires_dbus_property(self):
1237
return datetime_to_dbus(self.expires)
1238
1239
# LastApprovalRequest - property
1240
@dbus_service_property(_interface, signature="s", access="read")
1241
def LastApprovalRequest_dbus_property(self):
1242
return datetime_to_dbus(self.last_approval_request)
1243
1244
# Timeout - property
1245
@dbus_service_property(_interface, signature="t",
1246
access="readwrite")
1247
def Timeout_dbus_property(self, value=None):
1248
if value is None: # get
1249
return dbus.UInt64(self.timeout_milliseconds())
1250
self.timeout = datetime.timedelta(0, 0, 0, value)
1251
if getattr(self, "disable_initiator_tag", None) is None:
1252
return
1253
# Reschedule timeout
1254
gobject.source_remove(self.disable_initiator_tag)
1255
self.disable_initiator_tag = None
1256
self.expires = None
1257
time_to_die = _timedelta_to_milliseconds((self
1258
.last_checked_ok
1259
+ self.timeout)
1260
- datetime.datetime
1261
.utcnow())
1262
if time_to_die <= 0:
1263
# The timeout has passed
1264
self.disable()
1265
else:
1266
self.expires = (datetime.datetime.utcnow()
1267
+ datetime.timedelta(milliseconds =
1268
time_to_die))
1269
self.disable_initiator_tag = (gobject.timeout_add
1270
(time_to_die, self.disable))
1271
1272
# ExtendedTimeout - property
1273
@dbus_service_property(_interface, signature="t",
1274
access="readwrite")
1275
def ExtendedTimeout_dbus_property(self, value=None):
1276
if value is None: # get
1277
return dbus.UInt64(self.extended_timeout_milliseconds())
1278
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1279
1280
# Interval - property
1281
@dbus_service_property(_interface, signature="t",
1282
access="readwrite")
1283
def Interval_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.UInt64(self.interval_milliseconds())
1286
self.interval = datetime.timedelta(0, 0, 0, value)
1287
if getattr(self, "checker_initiator_tag", None) is None:
1288
return
1289
# Reschedule checker run
1290
gobject.source_remove(self.checker_initiator_tag)
1291
self.checker_initiator_tag = (gobject.timeout_add
1292
(value, self.start_checker))
1293
self.start_checker() # Start one now, too
1294
1295
# Checker - property
1296
@dbus_service_property(_interface, signature="s",
1297
access="readwrite")
1298
def Checker_dbus_property(self, value=None):
1299
if value is None: # get
1300
return dbus.String(self.checker_command)
1301
self.checker_command = value
1302
1303
# CheckerRunning - property
1304
@dbus_service_property(_interface, signature="b",
1305
access="readwrite")
1306
def CheckerRunning_dbus_property(self, value=None):
1307
if value is None: # get
1308
return dbus.Boolean(self.checker is not None)
1309
if value:
1310
self.start_checker()
1311
else:
1312
self.stop_checker()
1313
1314
# ObjectPath - property
1315
@dbus_service_property(_interface, signature="o", access="read")
1316
def ObjectPath_dbus_property(self):
1317
return self.dbus_object_path # is already a dbus.ObjectPath
1318
1319
# Secret = property
1320
@dbus_service_property(_interface, signature="ay",
1321
access="write", byte_arrays=True)
1322
def Secret_dbus_property(self, value):
1323
self.secret = str(value)
586
1324
587
1325
del _interface
588
1326
589
1327
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
596
# ...do the normal thing
597
return session.peer_certificate
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
604
" certificate")
605
if list_size.value == 0:
606
return None
607
cert = cert_list[0]
608
return ctypes.string_at(cert.data, cert.size)
609
610
611
def fingerprint(openpgp):
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
ctypes.POINTER
617
(ctypes.c_ubyte)),
618
ctypes.c_uint(len(openpgp))))
619
# New empty GnuTLS certificate
620
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
623
# Import the OpenPGP public key into the certificate
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
628
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
635
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
638
# Get the fingerprint from the certificate into the buffer
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
642
# Deinit the certificate
643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
646
# Convert the bytestring to hexadecimal notation
647
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
return hex_fpr
649
650
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
652
"""A TCP request handler class.
653
Instantiated by IPv6_TCPServer for each request to handle it.
1328
class ProxyClient(object):
1329
def __init__(self, child_pipe, fpr, address):
1330
self._pipe = child_pipe
1331
self._pipe.send(('init', fpr, address))
1332
if not self._pipe.recv():
1333
raise KeyError()
1334
1335
def __getattribute__(self, name):
1336
if(name == '_pipe'):
1337
return super(ProxyClient, self).__getattribute__(name)
1338
self._pipe.send(('getattr', name))
1339
data = self._pipe.recv()
1340
if data[0] == 'data':
1341
return data[1]
1342
if data[0] == 'function':
1343
def func(*args, **kwargs):
1344
self._pipe.send(('funcall', name, args, kwargs))
1345
return self._pipe.recv()[1]
1346
return func
1347
1348
def __setattr__(self, name, value):
1349
if(name == '_pipe'):
1350
return super(ProxyClient, self).__setattr__(name, value)
1351
self._pipe.send(('setattr', name, value))
1352
1353
class ClientDBusTransitional(ClientDBus):
1354
__metaclass__ = AlternateDBusNamesMetaclass
1355
1356
class ClientHandler(socketserver.BaseRequestHandler, object):
1357
"""A class to handle client connections.
1358
1359
Instantiated once for each connection to handle it.
654
1360
Note: This will run in its own forked process."""
655
1361
656
1362
def handle(self):
657
logger.info(u"TCP connection from: %s",
658
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
663
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
666
try:
667
if int(line.strip().split()[0]) > 1:
668
raise RuntimeError
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
671
return
672
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
677
678
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
# "+DHE-DSS"))
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
685
priority, None))
686
687
try:
688
session.handshake()
689
except gnutls.errors.GNUTLSError, error:
690
logger.warning(u"Handshake failed: %s", error)
691
# Do not run session.bye() here: the session is not
692
# established. Just abandon the request.
693
return
694
logger.debug(u"Handshake succeeded")
695
try:
696
fpr = fingerprint(peer_certificate(session))
697
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
699
session.bye()
700
return
701
logger.debug(u"Fingerprint: %s", fpr)
702
703
for c in self.server.clients:
704
if c.fingerprint == fpr:
705
client = c
706
break
707
else:
708
logger.warning(u"Client not found for fingerprint: %s",
709
fpr)
710
session.bye()
711
return
712
# Have to check if client.still_valid(), since it is possible
713
# that the client timed out while establishing the GnuTLS
714
# session.
715
if not client.still_valid():
716
logger.warning(u"Client %(name)s is invalid",
717
vars(client))
718
session.bye()
719
return
720
## This won't work here, since we're in a fork.
721
# client.checked_ok()
722
sent_size = 0
723
while sent_size < len(client.secret):
724
sent = session.send(client.secret[sent_size:])
725
logger.debug(u"Sent: %d, remaining: %d",
726
sent, len(client.secret)
727
- (sent_size + sent))
728
sent_size += sent
729
session.bye()
730
731
732
class IPv6_TCPServer(SocketServer.ForkingMixIn,
733
SocketServer.TCPServer, object):
734
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1363
with contextlib.closing(self.server.child_pipe) as child_pipe:
1364
logger.info("TCP connection from: %s",
1365
unicode(self.client_address))
1366
logger.debug("Pipe FD: %d",
1367
self.server.child_pipe.fileno())
1368
1369
session = (gnutls.connection
1370
.ClientSession(self.request,
1371
gnutls.connection
1372
.X509Credentials()))
1373
1374
# Note: gnutls.connection.X509Credentials is really a
1375
# generic GnuTLS certificate credentials object so long as
1376
# no X.509 keys are added to it. Therefore, we can use it
1377
# here despite using OpenPGP certificates.
1378
1379
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1380
# "+AES-256-CBC", "+SHA1",
1381
# "+COMP-NULL", "+CTYPE-OPENPGP",
1382
# "+DHE-DSS"))
1383
# Use a fallback default, since this MUST be set.
1384
priority = self.server.gnutls_priority
1385
if priority is None:
1386
priority = "NORMAL"
1387
(gnutls.library.functions
1388
.gnutls_priority_set_direct(session._c_object,
1389
priority, None))
1390
1391
# Start communication using the Mandos protocol
1392
# Get protocol number
1393
line = self.request.makefile().readline()
1394
logger.debug("Protocol version: %r", line)
1395
try:
1396
if int(line.strip().split()[0]) > 1:
1397
raise RuntimeError
1398
except (ValueError, IndexError, RuntimeError) as error:
1399
logger.error("Unknown protocol version: %s", error)
1400
return
1401
1402
# Start GnuTLS connection
1403
try:
1404
session.handshake()
1405
except gnutls.errors.GNUTLSError as error:
1406
logger.warning("Handshake failed: %s", error)
1407
# Do not run session.bye() here: the session is not
1408
# established. Just abandon the request.
1409
return
1410
logger.debug("Handshake succeeded")
1411
1412
approval_required = False
1413
try:
1414
try:
1415
fpr = self.fingerprint(self.peer_certificate
1416
(session))
1417
except (TypeError,
1418
gnutls.errors.GNUTLSError) as error:
1419
logger.warning("Bad certificate: %s", error)
1420
return
1421
logger.debug("Fingerprint: %s", fpr)
1422
1423
try:
1424
client = ProxyClient(child_pipe, fpr,
1425
self.client_address)
1426
except KeyError:
1427
return
1428
1429
if client.approval_delay:
1430
delay = client.approval_delay
1431
client.approvals_pending += 1
1432
approval_required = True
1433
1434
while True:
1435
if not client.enabled:
1436
logger.info("Client %s is disabled",
1437
client.name)
1438
if self.server.use_dbus:
1439
# Emit D-Bus signal
1440
client.Rejected("Disabled")
1441
return
1442
1443
if client._approved or not client.approval_delay:
1444
#We are approved or approval is disabled
1445
break
1446
elif client._approved is None:
1447
logger.info("Client %s needs approval",
1448
client.name)
1449
if self.server.use_dbus:
1450
# Emit D-Bus signal
1451
client.NeedApproval(
1452
client.approval_delay_milliseconds(),
1453
client.approved_by_default)
1454
else:
1455
logger.warning("Client %s was not approved",
1456
client.name)
1457
if self.server.use_dbus:
1458
# Emit D-Bus signal
1459
client.Rejected("Denied")
1460
return
1461
1462
#wait until timeout or approved
1463
time = datetime.datetime.now()
1464
client.changedstate.acquire()
1465
(client.changedstate.wait
1466
(float(client._timedelta_to_milliseconds(delay)
1467
/ 1000)))
1468
client.changedstate.release()
1469
time2 = datetime.datetime.now()
1470
if (time2 - time) >= delay:
1471
if not client.approved_by_default:
1472
logger.warning("Client %s timed out while"
1473
" waiting for approval",
1474
client.name)
1475
if self.server.use_dbus:
1476
# Emit D-Bus signal
1477
client.Rejected("Approval timed out")
1478
return
1479
else:
1480
break
1481
else:
1482
delay -= time2 - time
1483
1484
sent_size = 0
1485
while sent_size < len(client.secret):
1486
try:
1487
sent = session.send(client.secret[sent_size:])
1488
except gnutls.errors.GNUTLSError as error:
1489
logger.warning("gnutls send failed")
1490
return
1491
logger.debug("Sent: %d, remaining: %d",
1492
sent, len(client.secret)
1493
- (sent_size + sent))
1494
sent_size += sent
1495
1496
logger.info("Sending secret to %s", client.name)
1497
# bump the timeout using extended_timeout
1498
client.checked_ok(client.extended_timeout)
1499
if self.server.use_dbus:
1500
# Emit D-Bus signal
1501
client.GotSecret()
1502
1503
finally:
1504
if approval_required:
1505
client.approvals_pending -= 1
1506
try:
1507
session.bye()
1508
except gnutls.errors.GNUTLSError as error:
1509
logger.warning("GnuTLS bye failed")
1510
1511
@staticmethod
1512
def peer_certificate(session):
1513
"Return the peer's OpenPGP certificate as a bytestring"
1514
# If not an OpenPGP certificate...
1515
if (gnutls.library.functions
1516
.gnutls_certificate_type_get(session._c_object)
1517
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1518
# ...do the normal thing
1519
return session.peer_certificate
1520
list_size = ctypes.c_uint(1)
1521
cert_list = (gnutls.library.functions
1522
.gnutls_certificate_get_peers
1523
(session._c_object, ctypes.byref(list_size)))
1524
if not bool(cert_list) and list_size.value != 0:
1525
raise gnutls.errors.GNUTLSError("error getting peer"
1526
" certificate")
1527
if list_size.value == 0:
1528
return None
1529
cert = cert_list[0]
1530
return ctypes.string_at(cert.data, cert.size)
1531
1532
@staticmethod
1533
def fingerprint(openpgp):
1534
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1535
# New GnuTLS "datum" with the OpenPGP public key
1536
datum = (gnutls.library.types
1537
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1538
ctypes.POINTER
1539
(ctypes.c_ubyte)),
1540
ctypes.c_uint(len(openpgp))))
1541
# New empty GnuTLS certificate
1542
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1543
(gnutls.library.functions
1544
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1545
# Import the OpenPGP public key into the certificate
1546
(gnutls.library.functions
1547
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1548
gnutls.library.constants
1549
.GNUTLS_OPENPGP_FMT_RAW))
1550
# Verify the self signature in the key
1551
crtverify = ctypes.c_uint()
1552
(gnutls.library.functions
1553
.gnutls_openpgp_crt_verify_self(crt, 0,
1554
ctypes.byref(crtverify)))
1555
if crtverify.value != 0:
1556
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1557
raise (gnutls.errors.CertificateSecurityError
1558
("Verify failed"))
1559
# New buffer for the fingerprint
1560
buf = ctypes.create_string_buffer(20)
1561
buf_len = ctypes.c_size_t()
1562
# Get the fingerprint from the certificate into the buffer
1563
(gnutls.library.functions
1564
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1565
ctypes.byref(buf_len)))
1566
# Deinit the certificate
1567
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1568
# Convert the buffer to a Python bytestring
1569
fpr = ctypes.string_at(buf, buf_len.value)
1570
# Convert the bytestring to hexadecimal notation
1571
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1572
return hex_fpr
1573
1574
1575
class MultiprocessingMixIn(object):
1576
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1577
def sub_process_main(self, request, address):
1578
try:
1579
self.finish_request(request, address)
1580
except:
1581
self.handle_error(request, address)
1582
self.close_request(request)
1583
1584
def process_request(self, request, address):
1585
"""Start a new process to process the request."""
1586
proc = multiprocessing.Process(target = self.sub_process_main,
1587
args = (request,
1588
address))
1589
proc.start()
1590
return proc
1591
1592
1593
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1594
""" adds a pipe to the MixIn """
1595
def process_request(self, request, client_address):
1596
"""Overrides and wraps the original process_request().
1597
1598
This function creates a new pipe in self.pipe
1599
"""
1600
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1601
1602
proc = MultiprocessingMixIn.process_request(self, request,
1603
client_address)
1604
self.child_pipe.close()
1605
self.add_pipe(parent_pipe, proc)
1606
1607
def add_pipe(self, parent_pipe, proc):
1608
"""Dummy function; override as necessary"""
1609
raise NotImplementedError
1610
1611
1612
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1613
socketserver.TCPServer, object):
1614
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1615
735
1616
Attributes:
736
settings: Server settings
737
clients: Set() of Client objects
738
1617
enabled: Boolean; whether this server is activated yet
1618
interface: None or a network interface name (string)
1619
use_ipv6: Boolean; to use IPv6 or not
739
1620
"""
740
address_family = socket.AF_INET6
741
def __init__(self, *args, **kwargs):
742
if "settings" in kwargs:
743
self.settings = kwargs["settings"]
744
del kwargs["settings"]
745
if "clients" in kwargs:
746
self.clients = kwargs["clients"]
747
del kwargs["clients"]
748
self.enabled = False
749
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1621
def __init__(self, server_address, RequestHandlerClass,
1622
interface=None, use_ipv6=True):
1623
self.interface = interface
1624
if use_ipv6:
1625
self.address_family = socket.AF_INET6
1626
socketserver.TCPServer.__init__(self, server_address,
1627
RequestHandlerClass)
750
1628
def server_bind(self):
751
1629
"""This overrides the normal server_bind() function
752
1630
to bind to an interface if one was specified, and also NOT to
753
1631
bind to an address or port if they were not specified."""
754
if self.settings["interface"]:
755
# 25 is from /usr/include/asm-i486/socket.h
756
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
757
try:
758
self.socket.setsockopt(socket.SOL_SOCKET,
759
SO_BINDTODEVICE,
760
self.settings["interface"])
761
except socket.error, error:
762
if error[0] == errno.EPERM:
763
logger.error(u"No permission to"
764
u" bind to interface %s",
765
self.settings["interface"])
766
else:
767
raise error
1632
if self.interface is not None:
1633
if SO_BINDTODEVICE is None:
1634
logger.error("SO_BINDTODEVICE does not exist;"
1635
" cannot bind to interface %s",
1636
self.interface)
1637
else:
1638
try:
1639
self.socket.setsockopt(socket.SOL_SOCKET,
1640
SO_BINDTODEVICE,
1641
str(self.interface
1642
+ '\0'))
1643
except socket.error as error:
1644
if error[0] == errno.EPERM:
1645
logger.error("No permission to"
1646
" bind to interface %s",
1647
self.interface)
1648
elif error[0] == errno.ENOPROTOOPT:
1649
logger.error("SO_BINDTODEVICE not available;"
1650
" cannot bind to interface %s",
1651
self.interface)
1652
else:
1653
raise
768
1654
# Only bind(2) the socket if we really need to.
769
1655
if self.server_address[0] or self.server_address[1]:
770
1656
if not self.server_address[0]:
771
in6addr_any = "::"
772
self.server_address = (in6addr_any,
1657
if self.address_family == socket.AF_INET6:
1658
any_address = "::" # in6addr_any
1659
else:
1660
any_address = socket.INADDR_ANY
1661
self.server_address = (any_address,
773
1662
self.server_address[1])
774
1663
elif not self.server_address[1]:
775
1664
self.server_address = (self.server_address[0],
776
1665
0)
777
# if self.settings["interface"]:
1666
# if self.interface:
778
1667
# self.server_address = (self.server_address[0],
779
1668
# 0, # port
780
1669
# 0, # flowinfo
781
1670
# if_nametoindex
782
# (self.settings
783
# ["interface"]))
784
return super(IPv6_TCPServer, self).server_bind()
1671
# (self.interface))
1672
return socketserver.TCPServer.server_bind(self)
1673
1674
1675
class MandosServer(IPv6_TCPServer):
1676
"""Mandos server.
1677
1678
Attributes:
1679
clients: set of Client objects
1680
gnutls_priority GnuTLS priority string
1681
use_dbus: Boolean; to emit D-Bus signals or not
1682
1683
Assumes a gobject.MainLoop event loop.
1684
"""
1685
def __init__(self, server_address, RequestHandlerClass,
1686
interface=None, use_ipv6=True, clients=None,
1687
gnutls_priority=None, use_dbus=True):
1688
self.enabled = False
1689
self.clients = clients
1690
if self.clients is None:
1691
self.clients = {}
1692
self.use_dbus = use_dbus
1693
self.gnutls_priority = gnutls_priority
1694
IPv6_TCPServer.__init__(self, server_address,
1695
RequestHandlerClass,
1696
interface = interface,
1697
use_ipv6 = use_ipv6)
785
1698
def server_activate(self):
786
1699
if self.enabled:
787
return super(IPv6_TCPServer, self).server_activate()
1700
return socketserver.TCPServer.server_activate(self)
1701
788
1702
def enable(self):
789
1703
self.enabled = True
1704
1705
def add_pipe(self, parent_pipe, proc):
1706
# Call "handle_ipc" for both data and EOF events
1707
gobject.io_add_watch(parent_pipe.fileno(),
1708
gobject.IO_IN | gobject.IO_HUP,
1709
functools.partial(self.handle_ipc,
1710
parent_pipe =
1711
parent_pipe,
1712
proc = proc))
1713
1714
def handle_ipc(self, source, condition, parent_pipe=None,
1715
proc = None, client_object=None):
1716
condition_names = {
1717
gobject.IO_IN: "IN", # There is data to read.
1718
gobject.IO_OUT: "OUT", # Data can be written (without
1719
# blocking).
1720
gobject.IO_PRI: "PRI", # There is urgent data to read.
1721
gobject.IO_ERR: "ERR", # Error condition.
1722
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1723
# broken, usually for pipes and
1724
# sockets).
1725
}
1726
conditions_string = ' | '.join(name
1727
for cond, name in
1728
condition_names.iteritems()
1729
if cond & condition)
1730
# error, or the other end of multiprocessing.Pipe has closed
1731
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1732
# Wait for other process to exit
1733
proc.join()
1734
return False
1735
1736
# Read a request from the child
1737
request = parent_pipe.recv()
1738
command = request[0]
1739
1740
if command == 'init':
1741
fpr = request[1]
1742
address = request[2]
1743
1744
for c in self.clients.itervalues():
1745
if c.fingerprint == fpr:
1746
client = c
1747
break
1748
else:
1749
logger.info("Client not found for fingerprint: %s, ad"
1750
"dress: %s", fpr, address)
1751
if self.use_dbus:
1752
# Emit D-Bus signal
1753
mandos_dbus_service.ClientNotFound(fpr,
1754
address[0])
1755
parent_pipe.send(False)
1756
return False
1757
1758
gobject.io_add_watch(parent_pipe.fileno(),
1759
gobject.IO_IN | gobject.IO_HUP,
1760
functools.partial(self.handle_ipc,
1761
parent_pipe =
1762
parent_pipe,
1763
proc = proc,
1764
client_object =
1765
client))
1766
parent_pipe.send(True)
1767
# remove the old hook in favor of the new above hook on
1768
# same fileno
1769
return False
1770
if command == 'funcall':
1771
funcname = request[1]
1772
args = request[2]
1773
kwargs = request[3]
1774
1775
parent_pipe.send(('data', getattr(client_object,
1776
funcname)(*args,
1777
**kwargs)))
1778
1779
if command == 'getattr':
1780
attrname = request[1]
1781
if callable(client_object.__getattribute__(attrname)):
1782
parent_pipe.send(('function',))
1783
else:
1784
parent_pipe.send(('data', client_object
1785
.__getattribute__(attrname)))
1786
1787
if command == 'setattr':
1788
attrname = request[1]
1789
value = request[2]
1790
setattr(client_object, attrname, value)
1791
1792
return True
790
1793
791
1794
792
1795
def string_to_delta(interval):
800
1803
datetime.timedelta(0, 3600)
801
1804
>>> string_to_delta('24h')
802
1805
datetime.timedelta(1)
803
>>> string_to_delta(u'1w')
1806
>>> string_to_delta('1w')
804
1807
datetime.timedelta(7)
805
1808
>>> string_to_delta('5m 30s')
806
1809
datetime.timedelta(0, 330)
810
1813
try:
811
1814
suffix = unicode(s[-1])
812
1815
value = int(s[:-1])
813
if suffix == u"d":
1816
if suffix == "d":
814
1817
delta = datetime.timedelta(value)
815
elif suffix == u"s":
1818
elif suffix == "s":
816
1819
delta = datetime.timedelta(0, value)
817
elif suffix == u"m":
1820
elif suffix == "m":
818
1821
delta = datetime.timedelta(0, 0, 0, 0, value)
819
elif suffix == u"h":
1822
elif suffix == "h":
820
1823
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
821
elif suffix == u"w":
1824
elif suffix == "w":
822
1825
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
823
1826
else:
824
raise ValueError
825
except (ValueError, IndexError):
826
raise ValueError
1827
raise ValueError("Unknown suffix %r" % suffix)
1828
except (ValueError, IndexError) as e:
1829
raise ValueError(*(e.args))
827
1830
timevalue += delta
828
1831
return timevalue
829
1832
830
1833
831
def server_state_changed(state):
832
"""Derived from the Avahi example code"""
833
if state == avahi.SERVER_COLLISION:
834
logger.error(u"Zeroconf server name collision")
835
service.remove()
836
elif state == avahi.SERVER_RUNNING:
837
service.add()
838
839
840
def entry_group_state_changed(state, error):
841
"""Derived from the Avahi example code"""
842
logger.debug(u"Avahi state change: %i", state)
843
844
if state == avahi.ENTRY_GROUP_ESTABLISHED:
845
logger.debug(u"Zeroconf service established.")
846
elif state == avahi.ENTRY_GROUP_COLLISION:
847
logger.warning(u"Zeroconf service name collision.")
848
service.rename()
849
elif state == avahi.ENTRY_GROUP_FAILURE:
850
logger.critical(u"Avahi: Error in group state changed %s",
851
unicode(error))
852
raise AvahiGroupError(u"State changed: %s" % unicode(error))
853
854
1834
def if_nametoindex(interface):
855
"""Call the C function if_nametoindex(), or equivalent"""
1835
"""Call the C function if_nametoindex(), or equivalent
1836
1837
Note: This function cannot accept a unicode string."""
856
1838
global if_nametoindex
857
1839
try:
858
1840
if_nametoindex = (ctypes.cdll.LoadLibrary
859
1841
(ctypes.util.find_library("c"))
860
1842
.if_nametoindex)
861
1843
except (OSError, AttributeError):
862
if "struct" not in sys.modules:
863
import struct
864
if "fcntl" not in sys.modules:
865
import fcntl
1844
logger.warning("Doing if_nametoindex the hard way")
866
1845
def if_nametoindex(interface):
867
1846
"Get an interface index the hard way, i.e. using fcntl()"
868
1847
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
869
with closing(socket.socket()) as s:
1848
with contextlib.closing(socket.socket()) as s:
870
1849
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
871
struct.pack("16s16x", interface))
872
interface_index = struct.unpack("I", ifreq[16:20])[0]
1850
struct.pack(str("16s16x"),
1851
interface))
1852
interface_index = struct.unpack(str("I"),
1853
ifreq[16:20])[0]
873
1854
return interface_index
874
1855
return if_nametoindex(interface)
875
1856
876
1857
877
1858
def daemon(nochdir = False, noclose = False):
878
1859
"""See daemon(3). Standard BSD Unix function.
1860
879
1861
This should really exist as os.daemon, but it doesn't (yet)."""
880
1862
if os.fork():
881
1863
sys.exit()
889
1871
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
890
1872
if not stat.S_ISCHR(os.fstat(null).st_mode):
891
1873
raise OSError(errno.ENODEV,
892
"/dev/null not a character device")
1874
"%s not a character device"
1875
% os.path.devnull)
893
1876
os.dup2(null, sys.stdin.fileno())
894
1877
os.dup2(null, sys.stdout.fileno())
895
1878
os.dup2(null, sys.stderr.fileno())
898
1881
899
1882
900
1883
def main():
901
parser = optparse.OptionParser(version = "%%prog %s" % version)
902
parser.add_option("-i", "--interface", type="string",
903
metavar="IF", help="Bind to interface IF")
904
parser.add_option("-a", "--address", type="string",
905
help="Address to listen for requests on")
906
parser.add_option("-p", "--port", type="int",
907
help="Port number to receive requests on")
908
parser.add_option("--check", action="store_true",
909
help="Run self-test")
910
parser.add_option("--debug", action="store_true",
911
help="Debug mode; run in foreground and log to"
912
" terminal")
913
parser.add_option("--priority", type="string", help="GnuTLS"
914
" priority string (see GnuTLS documentation)")
915
parser.add_option("--servicename", type="string", metavar="NAME",
916
help="Zeroconf service name")
917
parser.add_option("--configdir", type="string",
918
default="/etc/mandos", metavar="DIR",
919
help="Directory to search for configuration"
920
" files")
921
parser.add_option("--no-dbus", action="store_false",
922
dest="use_dbus",
923
help="Do not provide D-Bus system bus"
924
" interface")
925
options = parser.parse_args()[0]
1884
1885
##################################################################
1886
# Parsing of options, both command line and config file
1887
1888
parser = argparse.ArgumentParser()
1889
parser.add_argument("-v", "--version", action="version",
1890
version = "%%(prog)s %s" % version,
1891
help="show version number and exit")
1892
parser.add_argument("-i", "--interface", metavar="IF",
1893
help="Bind to interface IF")
1894
parser.add_argument("-a", "--address",
1895
help="Address to listen for requests on")
1896
parser.add_argument("-p", "--port", type=int,
1897
help="Port number to receive requests on")
1898
parser.add_argument("--check", action="store_true",
1899
help="Run self-test")
1900
parser.add_argument("--debug", action="store_true",
1901
help="Debug mode; run in foreground and log"
1902
" to terminal")
1903
parser.add_argument("--debuglevel", metavar="LEVEL",
1904
help="Debug level for stdout output")
1905
parser.add_argument("--priority", help="GnuTLS"
1906
" priority string (see GnuTLS documentation)")
1907
parser.add_argument("--servicename",
1908
metavar="NAME", help="Zeroconf service name")
1909
parser.add_argument("--configdir",
1910
default="/etc/mandos", metavar="DIR",
1911
help="Directory to search for configuration"
1912
" files")
1913
parser.add_argument("--no-dbus", action="store_false",
1914
dest="use_dbus", help="Do not provide D-Bus"
1915
" system bus interface")
1916
parser.add_argument("--no-ipv6", action="store_false",
1917
dest="use_ipv6", help="Do not use IPv6")
1918
parser.add_argument("--no-restore", action="store_false",
1919
dest="restore", help="Do not restore old state",
1920
default=True)
1921
1922
options = parser.parse_args()
926
1923
927
1924
if options.check:
928
1925
import doctest
938
1935
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
939
1936
"servicename": "Mandos",
940
1937
"use_dbus": "True",
1938
"use_ipv6": "True",
1939
"debuglevel": "",
941
1940
}
942
1941
943
1942
# Parse config file for server-global settings
944
server_config = ConfigParser.SafeConfigParser(server_defaults)
1943
server_config = configparser.SafeConfigParser(server_defaults)
945
1944
del server_defaults
946
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1945
server_config.read(os.path.join(options.configdir,
1946
"mandos.conf"))
947
1947
# Convert the SafeConfigParser object to a dict
948
1948
server_settings = server_config.defaults()
949
1949
# Use the appropriate methods on the non-string config options
950
server_settings["debug"] = server_config.getboolean("DEFAULT",
951
"debug")
952
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
953
"use_dbus")
1950
for option in ("debug", "use_dbus", "use_ipv6"):
1951
server_settings[option] = server_config.getboolean("DEFAULT",
1952
option)
954
1953
if server_settings["port"]:
955
1954
server_settings["port"] = server_config.getint("DEFAULT",
956
1955
"port")
960
1959
# options, if set.
961
1960
for option in ("interface", "address", "port", "debug",
962
1961
"priority", "servicename", "configdir",
963
"use_dbus"):
1962
"use_dbus", "use_ipv6", "debuglevel", "restore"):
964
1963
value = getattr(options, option)
965
1964
if value is not None:
966
1965
server_settings[option] = value
967
1966
del options
1967
# Force all strings to be unicode
1968
for option in server_settings.keys():
1969
if type(server_settings[option]) is str:
1970
server_settings[option] = unicode(server_settings[option])
968
1971
# Now we have our good server settings in "server_settings"
969
1972
1973
##################################################################
1974
970
1975
# For convenience
971
1976
debug = server_settings["debug"]
1977
debuglevel = server_settings["debuglevel"]
972
1978
use_dbus = server_settings["use_dbus"]
973
974
def sigsegvhandler(signum, frame):
975
raise RuntimeError('Segmentation fault')
976
977
if not debug:
978
syslogger.setLevel(logging.WARNING)
979
console.setLevel(logging.WARNING)
980
else:
981
signal.signal(signal.SIGSEGV, sigsegvhandler)
1979
use_ipv6 = server_settings["use_ipv6"]
982
1980
983
1981
if server_settings["servicename"] != "Mandos":
984
1982
syslogger.setFormatter(logging.Formatter
985
('Mandos (%s): %%(levelname)s:'
986
' %%(message)s'
1983
('Mandos (%s) [%%(process)d]:'
1984
' %%(levelname)s: %%(message)s'
987
1985
% server_settings["servicename"]))
988
1986
989
1987
# Parse config file with clients
990
client_defaults = { "timeout": "1h",
991
"interval": "5m",
1988
client_defaults = { "timeout": "5m",
1989
"extended_timeout": "15m",
1990
"interval": "2m",
992
1991
"checker": "fping -q -- %%(host)s",
993
1992
"host": "",
1993
"approval_delay": "0s",
1994
"approval_duration": "1s",
994
1995
}
995
client_config = ConfigParser.SafeConfigParser(client_defaults)
1996
client_config = configparser.SafeConfigParser(client_defaults)
996
1997
client_config.read(os.path.join(server_settings["configdir"],
997
1998
"clients.conf"))
998
1999
999
clients = Set()
1000
tcp_server = IPv6_TCPServer((server_settings["address"],
1001
server_settings["port"]),
1002
TCP_handler,
1003
settings=server_settings,
1004
clients=clients)
1005
pidfilename = "/var/run/mandos.pid"
1006
try:
1007
pidfile = open(pidfilename, "w")
1008
except IOError, error:
1009
logger.error("Could not open file %r", pidfilename)
2000
global mandos_dbus_service
2001
mandos_dbus_service = None
2002
2003
tcp_server = MandosServer((server_settings["address"],
2004
server_settings["port"]),
2005
ClientHandler,
2006
interface=(server_settings["interface"]
2007
or None),
2008
use_ipv6=use_ipv6,
2009
gnutls_priority=
2010
server_settings["priority"],
2011
use_dbus=use_dbus)
2012
if not debug:
2013
pidfilename = "/var/run/mandos.pid"
2014
try:
2015
pidfile = open(pidfilename, "w")
2016
except IOError:
2017
logger.error("Could not open file %r", pidfilename)
1010
2018
1011
2019
try:
1012
2020
uid = pwd.getpwnam("_mandos").pw_uid
1018
2026
except KeyError:
1019
2027
try:
1020
2028
uid = pwd.getpwnam("nobody").pw_uid
1021
gid = pwd.getpwnam("nogroup").pw_gid
2029
gid = pwd.getpwnam("nobody").pw_gid
1022
2030
except KeyError:
1023
2031
uid = 65534
1024
2032
gid = 65534
1025
2033
try:
1026
2034
os.setgid(gid)
1027
2035
os.setuid(uid)
1028
except OSError, error:
2036
except OSError as error:
1029
2037
if error[0] != errno.EPERM:
1030
2038
raise error
1031
2039
1032
# Enable all possible GnuTLS debugging
2040
if not debug and not debuglevel:
2041
syslogger.setLevel(logging.WARNING)
2042
console.setLevel(logging.WARNING)
2043
if debuglevel:
2044
level = getattr(logging, debuglevel.upper())
2045
syslogger.setLevel(level)
2046
console.setLevel(level)
2047
1033
2048
if debug:
2049
# Enable all possible GnuTLS debugging
2050
1034
2051
# "Use a log level over 10 to enable all debugging options."
1035
2052
# - GnuTLS manual
1036
2053
gnutls.library.functions.gnutls_global_set_log_level(11)
1041
2058
1042
2059
(gnutls.library.functions
1043
2060
.gnutls_global_set_log_function(debug_gnutls))
2061
2062
# Redirect stdin so all checkers get /dev/null
2063
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2064
os.dup2(null, sys.stdin.fileno())
2065
if null > 2:
2066
os.close(null)
2067
else:
2068
# No console logging
2069
logger.removeHandler(console)
1044
2070
1045
global service
1046
service = AvahiService(name = server_settings["servicename"],
1047
servicetype = "_mandos._tcp", )
1048
if server_settings["interface"]:
1049
service.interface = (if_nametoindex
1050
(server_settings["interface"]))
2071
# Need to fork before connecting to D-Bus
2072
if not debug:
2073
# Close all input and output, do double fork, etc.
2074
daemon()
1051
2075
1052
2076
global main_loop
1053
global bus
1054
global server
1055
2077
# From the Avahi example code
1056
2078
DBusGMainLoop(set_as_default=True )
1057
2079
main_loop = gobject.MainLoop()
1058
2080
bus = dbus.SystemBus()
1059
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1060
avahi.DBUS_PATH_SERVER),
1061
avahi.DBUS_INTERFACE_SERVER)
1062
2081
# End of Avahi example code
1063
2082
if use_dbus:
1064
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1065
1066
clients.update(Set(Client(name = section,
1067
config
1068
= dict(client_config.items(section)),
1069
use_dbus = use_dbus)
1070
for section in client_config.sections()))
1071
if not clients:
1072
logger.warning(u"No clients defined")
1073
1074
if debug:
1075
# Redirect stdin so all checkers get /dev/null
1076
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1077
os.dup2(null, sys.stdin.fileno())
1078
if null > 2:
1079
os.close(null)
1080
else:
1081
# No console logging
1082
logger.removeHandler(console)
1083
# Close all input and output, do double fork, etc.
1084
daemon()
1085
1086
try:
1087
pid = os.getpid()
1088
pidfile.write(str(pid) + "\n")
1089
pidfile.close()
1090
del pidfile
1091
except IOError:
1092
logger.error(u"Could not write to file %r with PID %d",
1093
pidfilename, pid)
1094
except NameError:
1095
# "pidfile" was never created
1096
pass
1097
del pidfilename
1098
1099
def cleanup():
1100
"Cleanup function; run on exit"
1101
global group
1102
# From the Avahi example code
1103
if not group is None:
1104
group.Free()
1105
group = None
1106
# End of Avahi example code
1107
1108
while clients:
1109
client = clients.pop()
1110
client.disable_hook = None
1111
client.disable()
1112
1113
atexit.register(cleanup)
1114
2083
try:
2084
bus_name = dbus.service.BusName("se.recompile.Mandos",
2085
bus, do_not_queue=True)
2086
old_bus_name = (dbus.service.BusName
2087
("se.bsnet.fukt.Mandos", bus,
2088
do_not_queue=True))
2089
except dbus.exceptions.NameExistsException as e:
2090
logger.error(unicode(e) + ", disabling D-Bus")
2091
use_dbus = False
2092
server_settings["use_dbus"] = False
2093
tcp_server.use_dbus = False
2094
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2095
service = AvahiService(name = server_settings["servicename"],
2096
servicetype = "_mandos._tcp",
2097
protocol = protocol, bus = bus)
2098
if server_settings["interface"]:
2099
service.interface = (if_nametoindex
2100
(str(server_settings["interface"])))
2101
2102
global multiprocessing_manager
2103
multiprocessing_manager = multiprocessing.Manager()
2104
2105
client_class = Client
2106
if use_dbus:
2107
client_class = functools.partial(ClientDBusTransitional,
2108
bus = bus)
2109
2110
special_settings = {
2111
# Some settings need to be accessd by special methods;
2112
# booleans need .getboolean(), etc. Here is a list of them:
2113
"approved_by_default":
2114
lambda section:
2115
client_config.getboolean(section, "approved_by_default"),
2116
}
2117
# Construct a new dict of client settings of this form:
2118
# { client_name: {setting_name: value, ...}, ...}
2119
# with exceptions for any special settings as defined above
2120
client_settings = dict((clientname,
2121
dict((setting,
2122
(value if setting not in special_settings
2123
else special_settings[setting](clientname)))
2124
for setting, value in client_config.items(clientname)))
2125
for clientname in client_config.sections())
2126
2127
old_client_settings = {}
2128
clients_data = []
2129
2130
if server_settings["restore"]:
2131
try:
2132
with open(stored_state_path, "rb") as stored_state:
2133
clients_data, old_client_settings = pickle.load(stored_state)
2134
os.remove(stored_state_path)
2135
except IOError as e:
2136
logger.warning("Could not load persistant state: {0}".format(e))
2137
if e.errno != errno.ENOENT:
2138
raise
2139
2140
for client in clients_data:
2141
client_name = client["name"]
2142
2143
# Decide which value to use after restoring saved state.
2144
# We have three different values: Old config file,
2145
# new config file, and saved state.
2146
# New config value takes precedence if it differs from old
2147
# config value, otherwise use saved state.
2148
for name, value in client_settings[client_name].items():
2149
try:
2150
# For each value in new config, check if it differs
2151
# from the old config value (Except for the "secret"
2152
# attribute)
2153
if name != "secret" and value != old_client_settings[client_name][name]:
2154
setattr(client, name, value)
2155
except KeyError:
2156
pass
2157
2158
# Clients who has passed its expire date, can still be enabled if its
2159
# last checker was sucessful. Clients who checkers failed before we
2160
# stored it state is asumed to had failed checker during downtime.
2161
if client["enabled"] and client["last_checked_ok"]:
2162
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2163
> client["interval"]):
2164
if client["last_checker_status"] != 0:
2165
client["enabled"] = False
2166
else:
2167
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2168
2169
client["changedstate"] = (multiprocessing_manager
2170
.Condition(multiprocessing_manager
2171
.Lock()))
2172
if use_dbus:
2173
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2174
tcp_server.clients[client_name] = new_client
2175
new_client.bus = bus
2176
for name, value in client.iteritems():
2177
setattr(new_client, name, value)
2178
client_object_name = unicode(client_name).translate(
2179
{ord("."): ord("_"),
2180
ord("-"): ord("_")})
2181
new_client.dbus_object_path = (dbus.ObjectPath
2182
("/clients/" + client_object_name))
2183
DBusObjectWithProperties.__init__(new_client,
2184
new_client.bus,
2185
new_client.dbus_object_path)
2186
else:
2187
tcp_server.clients[client_name] = Client.__new__(Client)
2188
for name, value in client.iteritems():
2189
setattr(tcp_server.clients[client_name], name, value)
2190
2191
tcp_server.clients[client_name].decrypt_secret(
2192
client_settings[client_name]["secret"])
2193
2194
# Create/remove clients based on new changes made to config
2195
for clientname in set(old_client_settings) - set(client_settings):
2196
del tcp_server.clients[clientname]
2197
for clientname in set(client_settings) - set(old_client_settings):
2198
tcp_server.clients[clientname] = (client_class(name = clientname,
2199
config =
2200
client_settings
2201
[clientname]))
2202
2203
2204
if not tcp_server.clients:
2205
logger.warning("No clients defined")
2206
1115
2207
if not debug:
2208
try:
2209
with pidfile:
2210
pid = os.getpid()
2211
pidfile.write(str(pid) + "\n".encode("utf-8"))
2212
del pidfile
2213
except IOError:
2214
logger.error("Could not write to file %r with PID %d",
2215
pidfilename, pid)
2216
except NameError:
2217
# "pidfile" was never created
2218
pass
2219
del pidfilename
2220
1116
2221
signal.signal(signal.SIGINT, signal.SIG_IGN)
2222
1117
2223
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1118
2224
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1119
2225
1120
2226
if use_dbus:
1121
class MandosServer(dbus.service.Object):
2227
class MandosDBusService(dbus.service.Object):
1122
2228
"""A D-Bus proxy object"""
1123
2229
def __init__(self):
1124
2230
dbus.service.Object.__init__(self, bus, "/")
1125
_interface = u"se.bsnet.fukt.Mandos"
1126
1127
@dbus.service.signal(_interface, signature="oa{sv}")
1128
def ClientAdded(self, objpath, properties):
2231
_interface = "se.recompile.Mandos"
2232
2233
@dbus.service.signal(_interface, signature="o")
2234
def ClientAdded(self, objpath):
2235
"D-Bus signal"
2236
pass
2237
2238
@dbus.service.signal(_interface, signature="ss")
2239
def ClientNotFound(self, fingerprint, address):
1129
2240
"D-Bus signal"
1130
2241
pass
1131
2242
1137
2248
@dbus.service.method(_interface, out_signature="ao")
1138
2249
def GetAllClients(self):
1139
2250
"D-Bus method"
1140
return dbus.Array(c.dbus_object_path for c in clients)
2251
return dbus.Array(c.dbus_object_path
2252
for c in
2253
tcp_server.clients.itervalues())
1141
2254
1142
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2255
@dbus.service.method(_interface,
2256
out_signature="a{oa{sv}}")
1143
2257
def GetAllClientsWithProperties(self):
1144
2258
"D-Bus method"
1145
2259
return dbus.Dictionary(
1146
((c.dbus_object_path, c.GetAllProperties())
1147
for c in clients),
2260
((c.dbus_object_path, c.GetAll(""))
2261
for c in tcp_server.clients.itervalues()),
1148
2262
signature="oa{sv}")
1149
2263
1150
2264
@dbus.service.method(_interface, in_signature="o")
1151
2265
def RemoveClient(self, object_path):
1152
2266
"D-Bus method"
1153
for c in clients:
2267
for c in tcp_server.clients.itervalues():
1154
2268
if c.dbus_object_path == object_path:
1155
clients.remove(c)
2269
del tcp_server.clients[c.name]
2270
c.remove_from_connection()
1156
2271
# Don't signal anything except ClientRemoved
1157
c.use_dbus = False
1158
c.disable()
2272
c.disable(quiet=True)
1159
2273
# Emit D-Bus signal
1160
2274
self.ClientRemoved(object_path, c.name)
1161
2275
return
1162
raise KeyError
2276
raise KeyError(object_path)
1163
2277
1164
2278
del _interface
1165
2279
1166
mandos_server = MandosServer()
1167
1168
for client in clients:
2280
class MandosDBusServiceTransitional(MandosDBusService):
2281
__metaclass__ = AlternateDBusNamesMetaclass
2282
mandos_dbus_service = MandosDBusServiceTransitional()
2283
2284
def cleanup():
2285
"Cleanup function; run on exit"
2286
service.cleanup()
2287
2288
multiprocessing.active_children()
2289
if not (tcp_server.clients or client_settings):
2290
return
2291
2292
# Store client before exiting. Secrets are encrypted with key based
2293
# on what config file has. If config file is removed/edited, old
2294
# secret will thus be unrecovable.
2295
clients = []
2296
for client in tcp_server.clients.itervalues():
2297
client.encrypt_secret(client_settings[client.name]["secret"])
2298
2299
client_dict = {}
2300
2301
# A list of attributes that will not be stored when shuting down.
2302
exclude = set(("bus", "changedstate", "secret"))
2303
for name, typ in inspect.getmembers(dbus.service.Object):
2304
exclude.add(name)
2305
2306
client_dict["encrypted_secret"] = client.encrypted_secret
2307
for attr in client.client_structure:
2308
if attr not in exclude:
2309
client_dict[attr] = getattr(client, attr)
2310
2311
clients.append(client_dict)
2312
del client_settings[client.name]["secret"]
2313
2314
try:
2315
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2316
pickle.dump((clients, client_settings), stored_state)
2317
except IOError as e:
2318
logger.warning("Could not save persistant state: {0}".format(e))
2319
if e.errno != errno.ENOENT:
2320
raise
2321
2322
# Delete all clients, and settings from config
2323
while tcp_server.clients:
2324
name, client = tcp_server.clients.popitem()
2325
if use_dbus:
2326
client.remove_from_connection()
2327
# Don't signal anything except ClientRemoved
2328
client.disable(quiet=True)
2329
if use_dbus:
2330
# Emit D-Bus signal
2331
mandos_dbus_service.ClientRemoved(client
2332
.dbus_object_path,
2333
client.name)
2334
client_settings.clear()
2335
2336
atexit.register(cleanup)
2337
2338
for client in tcp_server.clients.itervalues():
1169
2339
if use_dbus:
1170
2340
# Emit D-Bus signal
1171
mandos_server.ClientAdded(client.dbus_object_path,
1172
client.GetAllProperties())
1173
client.enable()
2341
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2342
# Need to initiate checking of clients
2343
if client.enabled:
2344
client.init_checker()
2345
1174
2346
1175
2347
tcp_server.enable()
1176
2348
tcp_server.server_activate()
1177
2349
1178
2350
# Find out what port we got
1179
2351
service.port = tcp_server.socket.getsockname()[1]
1180
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1181
u" scope_id %d" % tcp_server.socket.getsockname())
2352
if use_ipv6:
2353
logger.info("Now listening on address %r, port %d,"
2354
" flowinfo %d, scope_id %d"
2355
% tcp_server.socket.getsockname())
2356
else: # IPv4
2357
logger.info("Now listening on address %r, port %d"
2358
% tcp_server.socket.getsockname())
1182
2359
1183
2360
#service.interface = tcp_server.socket.getsockname()[3]
1184
2361
1185
2362
try:
1186
2363
# From the Avahi example code
1187
server.connect_to_signal("StateChanged", server_state_changed)
1188
2364
try:
1189
server_state_changed(server.GetState())
1190
except dbus.exceptions.DBusException, error:
1191
logger.critical(u"DBusException: %s", error)
2365
service.activate()
2366
except dbus.exceptions.DBusException as error:
2367
logger.critical("DBusException: %s", error)
2368
cleanup()
1192
2369
sys.exit(1)
1193
2370
# End of Avahi example code
1194
2371
1197
2374
(tcp_server.handle_request
1198
2375
(*args[2:], **kwargs) or True))
1199
2376
1200
logger.debug(u"Starting main loop")
2377
logger.debug("Starting main loop")
1201
2378
main_loop.run()
1202
except AvahiError, error:
1203
logger.critical(u"AvahiError: %s", error)
2379
except AvahiError as error:
2380
logger.critical("AvahiError: %s", error)
2381
cleanup()
1204
2382
sys.exit(1)
1205
2383
except KeyboardInterrupt:
1206
2384
if debug:
1207
print
2385
print("", file=sys.stderr)
2386
logger.debug("Server received KeyboardInterrupt")
2387
logger.debug("Server exiting")
2388
# Must run before the D-Bus bus name gets deregistered
2389
cleanup()
2390
1208
2391
1209
2392
if __name__ == '__main__':
1210
2393
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0