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- Committer: Teddy Hogeborn
- Date: 2011-11-26 22:22:20 UTC
- mto: (237.12.8 mandos-persistent)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@recompile.se-20111126222220-1ubwjpb5ugqnrhec
Directory with persistent state can now be changed with the "statedir"
option. The state directory /var/lib/mandos now gets created on
installation. Added documentation about "restore" and "statedir"
options.
* Makefile (USER, GROUP, STATEDIR): New.
(maintainer-clean): Also remove "statedir".
(run-server): Replaced "--no-restore" with "--statedir=statedir".
(statedir): New.
(install-server): Make $(STATEDIR) directory.
* debian/mandos.dirs (var/lib/mandos): Added.
* debian/mandos.postinst: Fix ownership of /var/lib/mandos.
* mandos: New --statedir option.
(stored_state_path): Not global anymore.
(stored_state_file): New global.
* mandos.conf: Fix whitespace.
(restore, statedir): Added.
* mandos.conf.xml (OPTIONS, EXAMPLE): Added "restore" and "statedir".
mandos.xml (SYNOPSIS, OPTIONS): Added "--statedir".
(FILES): Added "/var/lib/mandos".
option. The state directory /var/lib/mandos now gets created on
installation. Added documentation about "restore" and "statedir"
options.
* Makefile (USER, GROUP, STATEDIR): New.
(maintainer-clean): Also remove "statedir".
(run-server): Replaced "--no-restore" with "--statedir=statedir".
(statedir): New.
(install-server): Make $(STATEDIR) directory.
* debian/mandos.dirs (var/lib/mandos): Added.
* debian/mandos.postinst: Fix ownership of /var/lib/mandos.
* mandos: New --statedir option.
(stored_state_path): Not global anymore.
(stored_state_file): New global.
* mandos.conf: Fix whitespace.
(restore, statedir): Added.
* mandos.conf.xml (OPTIONS, EXAMPLE): Added "restore" and "statedir".
mandos.xml (SYNOPSIS, OPTIONS): Added "--statedir".
(FILES): Added "/var/lib/mandos".
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
15
16
#
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
# GNU General Public License for more details.
25
26
#
26
27
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
import SocketServer as socketserver
35
38
import socket
36
import select
37
from optparse import OptionParser
39
import argparse
38
40
import datetime
39
41
import errno
40
42
import gnutls.crypto
43
45
import gnutls.library.functions
44
46
import gnutls.library.constants
45
47
import gnutls.library.types
46
import ConfigParser
48
import ConfigParser as configparser
47
49
import sys
48
50
import re
49
51
import os
50
52
import signal
51
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
58
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
57
68
58
69
import dbus
70
import dbus.service
59
71
import gobject
60
72
import avahi
61
73
from dbus.mainloop.glib import DBusGMainLoop
62
74
import ctypes
63
64
version = "1.0"
65
66
logger = logging.Logger('mandos')
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
72
logger.addHandler(syslogger)
73
74
console = logging.StreamHandler()
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
77
logger.addHandler(console)
75
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
79
80
try:
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
except AttributeError:
83
try:
84
from IN import SO_BINDTODEVICE
85
except ImportError:
86
SO_BINDTODEVICE = None
87
88
89
version = "1.4.1"
90
stored_state_file = "clients.pickle"
91
92
logger = logging.getLogger()
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
119
' %(message)s'))
120
logger.addHandler(syslogger)
121
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class CryptoError(Exception):
132
pass
133
134
135
class Crypto(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise CryptoError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise CryptoError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
78
209
79
210
class AvahiError(Exception):
80
def __init__(self, value):
211
def __init__(self, value, *args, **kwargs):
81
212
self.value = value
82
def __str__(self):
83
return repr(self.value)
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
84
216
85
217
class AvahiServiceError(AvahiError):
86
218
pass
91
223
92
224
class AvahiService(object):
93
225
"""An Avahi (Zeroconf) service.
226
94
227
Attributes:
95
228
interface: integer; avahi.IF_UNSPEC or an interface index.
96
229
Used to optionally bind to the specified interface.
104
237
max_renames: integer; maximum number of renames
105
238
rename_count: integer; counter so we only rename after collisions
106
239
a sensible number of times
240
group: D-Bus Entry Group
241
server: D-Bus Server
242
bus: dbus.SystemBus()
107
243
"""
108
244
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
245
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
247
protocol = avahi.PROTO_UNSPEC, bus = None):
111
248
self.interface = interface
112
249
self.name = name
113
self.type = type
250
self.type = servicetype
114
251
self.port = port
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
252
self.TXT = TXT if TXT is not None else []
119
253
self.domain = domain
120
254
self.host = host
121
255
self.rename_count = 0
256
self.max_renames = max_renames
257
self.protocol = protocol
258
self.group = None # our entry group
259
self.server = None
260
self.bus = bus
261
self.entry_group_state_changed_match = None
122
262
def rename(self):
123
263
"""Derived from the Avahi example code"""
124
264
if self.rename_count >= self.max_renames:
125
logger.critical(u"No suitable service name found after %i"
126
u" retries, exiting.", rename_count)
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
267
self.rename_count)
127
268
raise AvahiServiceError("Too many renames")
128
name = server.GetAlternativeServiceName(name)
129
logger.error(u"Changing name to %r ...", name)
130
syslogger.setFormatter(logging.Formatter\
131
('Mandos (%s): %%(levelname)s:'
132
' %%(message)s' % name))
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
133
273
self.remove()
134
self.add()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
135
280
self.rename_count += 1
136
281
def remove(self):
137
282
"""Derived from the Avahi example code"""
138
if group is not None:
139
group.Reset()
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
286
if self.group is not None:
287
self.group.Reset()
140
288
def add(self):
141
289
"""Derived from the Avahi example code"""
142
global group
143
if group is None:
144
group = dbus.Interface\
145
(bus.get_object(avahi.DBUS_NAME,
146
server.EntryGroupNew()),
147
avahi.DBUS_INTERFACE_ENTRY_GROUP)
148
group.connect_to_signal('StateChanged',
149
entry_group_state_changed)
150
logger.debug(u"Adding service '%s' of type '%s' ...",
151
service.name, service.type)
152
group.AddService(
153
self.interface, # interface
154
avahi.PROTO_INET6, # protocol
155
dbus.UInt32(0), # flags
156
self.name, self.type,
157
self.domain, self.host,
158
dbus.UInt16(self.port),
159
avahi.string_array_to_txt_array(self.TXT))
160
group.Commit()
161
162
# From the Avahi example code:
163
group = None # our entry group
164
# End of Avahi example code
165
166
290
self.remove()
291
if self.group is None:
292
self.group = dbus.Interface(
293
self.bus.get_object(avahi.DBUS_NAME,
294
self.server.EntryGroupNew()),
295
avahi.DBUS_INTERFACE_ENTRY_GROUP)
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
300
self.name, self.type)
301
self.group.AddService(
302
self.interface,
303
self.protocol,
304
dbus.UInt32(0), # flags
305
self.name, self.type,
306
self.domain, self.host,
307
dbus.UInt16(self.port),
308
avahi.string_array_to_txt_array(self.TXT))
309
self.group.Commit()
310
def entry_group_state_changed(self, state, error):
311
"""Derived from the Avahi example code"""
312
logger.debug("Avahi entry group state change: %i", state)
313
314
if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
logger.debug("Zeroconf service established.")
316
elif state == avahi.ENTRY_GROUP_COLLISION:
317
logger.info("Zeroconf service name collision.")
318
self.rename()
319
elif state == avahi.ENTRY_GROUP_FAILURE:
320
logger.critical("Avahi: Error in group state changed %s",
321
unicode(error))
322
raise AvahiGroupError("State changed: %s"
323
% unicode(error))
324
def cleanup(self):
325
"""Derived from the Avahi example code"""
326
if self.group is not None:
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
332
self.group = None
333
self.remove()
334
def server_state_changed(self, state, error=None):
335
"""Derived from the Avahi example code"""
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
351
elif state == avahi.SERVER_RUNNING:
352
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
358
def activate(self):
359
"""Derived from the Avahi example code"""
360
if self.server is None:
361
self.server = dbus.Interface(
362
self.bus.get_object(avahi.DBUS_NAME,
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
365
avahi.DBUS_INTERFACE_SERVER)
366
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
368
self.server_state_changed(self.server.GetState())
369
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
379
380
def _timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
167
386
class Client(object):
168
387
"""A representation of a client host served by this server.
388
169
389
Attributes:
170
name: string; from the config file, used in log messages
390
_approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
393
checker: subprocess.Popen(); a running checker process used
394
to see if the client lives.
395
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
399
runtime with vars(self) as dict, so that for
400
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
405
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
171
408
fingerprint: string (40 or 32 hexadecimal digits); used to
172
409
uniquely identify the client
173
secret: bytestring; sent verbatim (over TLS) to client
174
host: string; available for use by the checker command
175
created: datetime.datetime(); object creation, not client host
176
last_checked_ok: datetime.datetime() or None if not yet checked OK
177
timeout: datetime.timedelta(); How long from last_checked_ok
178
until this client is invalid
179
interval: datetime.timedelta(); How often to start a new checker
180
stop_hook: If set, called by stop() as stop_hook(self)
181
checker: subprocess.Popen(); a running checker process used
182
to see if the client lives.
183
'None' if no process is running.
184
checker_initiator_tag: a gobject event source tag, or None
185
stop_initiator_tag: - '' -
186
checker_callback_tag: - '' -
187
checker_command: string; External command which is run to check if
188
client lives. %() expansions are done at
189
runtime with vars(self) as dict, so that for
190
instance %(name)s can be used in the command.
191
Private attibutes:
192
_timeout: Real variable for 'timeout'
193
_interval: Real variable for 'interval'
194
_timeout_milliseconds: Used when calling gobject.timeout_add()
195
_interval_milliseconds: - '' -
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
417
checker, or None.
418
last_enabled: datetime.datetime(); (UTC)
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
196
428
"""
197
def _set_timeout(self, timeout):
198
"Setter function for 'timeout' attribute"
199
self._timeout = timeout
200
self._timeout_milliseconds = ((self.timeout.days
201
* 24 * 60 * 60 * 1000)
202
+ (self.timeout.seconds * 1000)
203
+ (self.timeout.microseconds
204
// 1000))
205
timeout = property(lambda self: self._timeout,
206
_set_timeout)
207
del _set_timeout
208
def _set_interval(self, interval):
209
"Setter function for 'interval' attribute"
210
self._interval = interval
211
self._interval_milliseconds = ((self.interval.days
212
* 24 * 60 * 60 * 1000)
213
+ (self.interval.seconds
214
* 1000)
215
+ (self.interval.microseconds
216
// 1000))
217
interval = property(lambda self: self._interval,
218
_set_interval)
219
del _set_interval
220
def __init__(self, name = None, stop_hook=None, config={}):
429
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
434
435
def timeout_milliseconds(self):
436
"Return the 'timeout' attribute in milliseconds"
437
return _timedelta_to_milliseconds(self.timeout)
438
439
def extended_timeout_milliseconds(self):
440
"Return the 'extended_timeout' attribute in milliseconds"
441
return _timedelta_to_milliseconds(self.extended_timeout)
442
443
def interval_milliseconds(self):
444
"Return the 'interval' attribute in milliseconds"
445
return _timedelta_to_milliseconds(self.interval)
446
447
def approval_delay_milliseconds(self):
448
return _timedelta_to_milliseconds(self.approval_delay)
449
450
def __init__(self, name = None, config=None):
221
451
"""Note: the 'checker' key in 'config' sets the
222
452
'checker_command' attribute and *not* the 'checker'
223
453
attribute."""
224
454
self.name = name
225
logger.debug(u"Creating client %r", self.name)
455
if config is None:
456
config = {}
457
logger.debug("Creating client %r", self.name)
226
458
# Uppercase and remove spaces from fingerprint for later
227
459
# comparison purposes with return value from the fingerprint()
228
460
# function
229
self.fingerprint = config["fingerprint"].upper()\
230
.replace(u" ", u"")
231
logger.debug(u" Fingerprint: %s", self.fingerprint)
461
self.fingerprint = (config["fingerprint"].upper()
462
.replace(" ", ""))
463
logger.debug(" Fingerprint: %s", self.fingerprint)
232
464
if "secret" in config:
233
self.secret = config["secret"].decode(u"base64")
465
self.secret = config["secret"].decode("base64")
234
466
elif "secfile" in config:
235
sf = open(config["secfile"])
236
self.secret = sf.read()
237
sf.close()
467
with open(os.path.expanduser(os.path.expandvars
468
(config["secfile"])),
469
"rb") as secfile:
470
self.secret = secfile.read()
238
471
else:
239
raise TypeError(u"No secret or secfile for client %s"
472
raise TypeError("No secret or secfile for client %s"
240
473
% self.name)
241
474
self.host = config.get("host", "")
242
self.created = datetime.datetime.now()
475
self.created = datetime.datetime.utcnow()
476
self.enabled = True
477
self.last_approval_request = None
478
self.last_enabled = datetime.datetime.utcnow()
243
479
self.last_checked_ok = None
480
self.last_checker_status = None
244
481
self.timeout = string_to_delta(config["timeout"])
482
self.extended_timeout = string_to_delta(config
483
["extended_timeout"])
245
484
self.interval = string_to_delta(config["interval"])
246
self.stop_hook = stop_hook
247
485
self.checker = None
248
486
self.checker_initiator_tag = None
249
self.stop_initiator_tag = None
487
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
250
489
self.checker_callback_tag = None
251
self.check_command = config["checker"]
252
def start(self):
490
self.checker_command = config["checker"]
491
self.current_checker_command = None
492
self._approved = None
493
self.approved_by_default = config.get("approved_by_default",
494
True)
495
self.approvals_pending = 0
496
self.approval_delay = string_to_delta(
497
config["approval_delay"])
498
self.approval_duration = string_to_delta(
499
config["approval_duration"])
500
self.changedstate = (multiprocessing_manager
501
.Condition(multiprocessing_manager
502
.Lock()))
503
self.client_structure = [attr for attr in
504
self.__dict__.iterkeys()
505
if not attr.startswith("_")]
506
self.client_structure.append("client_structure")
507
508
for name, t in inspect.getmembers(type(self),
509
lambda obj:
510
isinstance(obj,
511
property)):
512
if not name.startswith("_"):
513
self.client_structure.append(name)
514
515
# Send notice to process children that client state has changed
516
def send_changedstate(self):
517
with self.changedstate:
518
self.changedstate.notify_all()
519
520
def enable(self):
253
521
"""Start this client's checker and timeout hooks"""
254
# Schedule a new checker to be started an 'interval' from now,
255
# and every interval from then on.
256
self.checker_initiator_tag = gobject.timeout_add\
257
(self._interval_milliseconds,
258
self.start_checker)
259
# Also start a new checker *right now*.
260
self.start_checker()
261
# Schedule a stop() when 'timeout' has passed
262
self.stop_initiator_tag = gobject.timeout_add\
263
(self._timeout_milliseconds,
264
self.stop)
265
def stop(self):
266
"""Stop this client.
267
The possibility that a client might be restarted is left open,
268
but not currently used."""
269
# If this client doesn't have a secret, it is already stopped.
270
if hasattr(self, "secret") and self.secret:
271
logger.info(u"Stopping client %s", self.name)
272
self.secret = None
273
else:
522
if getattr(self, "enabled", False):
523
# Already enabled
524
return
525
self.send_changedstate()
526
self.expires = datetime.datetime.utcnow() + self.timeout
527
self.enabled = True
528
self.last_enabled = datetime.datetime.utcnow()
529
self.init_checker()
530
531
def disable(self, quiet=True):
532
"""Disable this client."""
533
if not getattr(self, "enabled", False):
274
534
return False
275
if getattr(self, "stop_initiator_tag", False):
276
gobject.source_remove(self.stop_initiator_tag)
277
self.stop_initiator_tag = None
535
if not quiet:
536
self.send_changedstate()
537
if not quiet:
538
logger.info("Disabling client %s", self.name)
539
if getattr(self, "disable_initiator_tag", False):
540
gobject.source_remove(self.disable_initiator_tag)
541
self.disable_initiator_tag = None
542
self.expires = None
278
543
if getattr(self, "checker_initiator_tag", False):
279
544
gobject.source_remove(self.checker_initiator_tag)
280
545
self.checker_initiator_tag = None
281
546
self.stop_checker()
282
if self.stop_hook:
283
self.stop_hook(self)
547
self.enabled = False
284
548
# Do not run this again if called by a gobject.timeout_add
285
549
return False
550
286
551
def __del__(self):
287
self.stop_hook = None
288
self.stop()
289
def checker_callback(self, pid, condition):
552
self.disable()
553
554
def init_checker(self):
555
# Schedule a new checker to be started an 'interval' from now,
556
# and every interval from then on.
557
self.checker_initiator_tag = (gobject.timeout_add
558
(self.interval_milliseconds(),
559
self.start_checker))
560
# Schedule a disable() when 'timeout' has passed
561
self.disable_initiator_tag = (gobject.timeout_add
562
(self.timeout_milliseconds(),
563
self.disable))
564
# Also start a new checker *right now*.
565
self.start_checker()
566
567
def checker_callback(self, pid, condition, command):
290
568
"""The checker has completed, so take appropriate actions."""
291
now = datetime.datetime.now()
292
569
self.checker_callback_tag = None
293
570
self.checker = None
294
if os.WIFEXITED(condition) \
295
and (os.WEXITSTATUS(condition) == 0):
296
logger.info(u"Checker for %(name)s succeeded",
297
vars(self))
298
self.last_checked_ok = now
299
gobject.source_remove(self.stop_initiator_tag)
300
self.stop_initiator_tag = gobject.timeout_add\
301
(self._timeout_milliseconds,
302
self.stop)
303
elif not os.WIFEXITED(condition):
304
logger.warning(u"Checker for %(name)s crashed?",
571
if os.WIFEXITED(condition):
572
self.last_checker_status = os.WEXITSTATUS(condition)
573
if self.last_checker_status == 0:
574
logger.info("Checker for %(name)s succeeded",
575
vars(self))
576
self.checked_ok()
577
else:
578
logger.info("Checker for %(name)s failed",
579
vars(self))
580
else:
581
self.last_checker_status = -1
582
logger.warning("Checker for %(name)s crashed?",
305
583
vars(self))
306
else:
307
logger.info(u"Checker for %(name)s failed",
308
vars(self))
584
585
def checked_ok(self, timeout=None):
586
"""Bump up the timeout for this client.
587
588
This should only be called when the client has been seen,
589
alive and well.
590
"""
591
if timeout is None:
592
timeout = self.timeout
593
self.last_checked_ok = datetime.datetime.utcnow()
594
if self.disable_initiator_tag is not None:
595
gobject.source_remove(self.disable_initiator_tag)
596
if getattr(self, "enabled", False):
597
self.disable_initiator_tag = (gobject.timeout_add
598
(_timedelta_to_milliseconds
599
(timeout), self.disable))
600
self.expires = datetime.datetime.utcnow() + timeout
601
602
def need_approval(self):
603
self.last_approval_request = datetime.datetime.utcnow()
604
309
605
def start_checker(self):
310
606
"""Start a new checker subprocess if one is not running.
607
311
608
If a checker already exists, leave it running and do
312
609
nothing."""
313
610
# The reason for not killing a running checker is that if we
316
613
# client would inevitably timeout, since no checker would get
317
614
# a chance to run to completion. If we instead leave running
318
615
# checkers alone, the checker would have to take more time
319
# than 'timeout' for the client to be declared invalid, which
320
# is as it should be.
616
# than 'timeout' for the client to be disabled, which is as it
617
# should be.
618
619
# If a checker exists, make sure it is not a zombie
620
try:
621
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
622
except (AttributeError, OSError) as error:
623
if (isinstance(error, OSError)
624
and error.errno != errno.ECHILD):
625
raise error
626
else:
627
if pid:
628
logger.warning("Checker was a zombie")
629
gobject.source_remove(self.checker_callback_tag)
630
self.checker_callback(pid, status,
631
self.current_checker_command)
632
# Start a new checker if needed
321
633
if self.checker is None:
322
634
try:
323
# In case check_command has exactly one % operator
324
command = self.check_command % self.host
635
# In case checker_command has exactly one % operator
636
command = self.checker_command % self.host
325
637
except TypeError:
326
638
# Escape attributes for the shell
327
escaped_attrs = dict((key, re.escape(str(val)))
328
for key, val in
329
vars(self).iteritems())
639
escaped_attrs = dict(
640
(attr,
641
re.escape(unicode(str(getattr(self, attr, "")),
642
errors=
643
'replace')))
644
for attr in
645
self.runtime_expansions)
646
330
647
try:
331
command = self.check_command % escaped_attrs
332
except TypeError, error:
333
logger.error(u'Could not format string "%s":'
334
u' %s', self.check_command, error)
648
command = self.checker_command % escaped_attrs
649
except TypeError as error:
650
logger.error('Could not format string "%s":'
651
' %s', self.checker_command, error)
335
652
return True # Try again later
653
self.current_checker_command = command
336
654
try:
337
logger.info(u"Starting checker %r for %s",
655
logger.info("Starting checker %r for %s",
338
656
command, self.name)
657
# We don't need to redirect stdout and stderr, since
658
# in normal mode, that is already done by daemon(),
659
# and in debug mode we don't want to. (Stdin is
660
# always replaced by /dev/null.)
339
661
self.checker = subprocess.Popen(command,
340
662
close_fds=True,
341
663
shell=True, cwd="/")
342
self.checker_callback_tag = gobject.child_watch_add\
343
(self.checker.pid,
344
self.checker_callback)
345
except subprocess.OSError, error:
346
logger.error(u"Failed to start subprocess: %s",
664
self.checker_callback_tag = (gobject.child_watch_add
665
(self.checker.pid,
666
self.checker_callback,
667
data=command))
668
# The checker may have completed before the gobject
669
# watch was added. Check for this.
670
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
671
if pid:
672
gobject.source_remove(self.checker_callback_tag)
673
self.checker_callback(pid, status, command)
674
except OSError as error:
675
logger.error("Failed to start subprocess: %s",
347
676
error)
348
677
# Re-run this periodically if run by gobject.timeout_add
349
678
return True
679
350
680
def stop_checker(self):
351
681
"""Force the checker process, if any, to stop."""
352
682
if self.checker_callback_tag:
354
684
self.checker_callback_tag = None
355
685
if getattr(self, "checker", None) is None:
356
686
return
357
logger.debug(u"Stopping checker for %(name)s", vars(self))
687
logger.debug("Stopping checker for %(name)s", vars(self))
358
688
try:
359
689
os.kill(self.checker.pid, signal.SIGTERM)
360
#os.sleep(0.5)
690
#time.sleep(0.5)
361
691
#if self.checker.poll() is None:
362
692
# os.kill(self.checker.pid, signal.SIGKILL)
363
except OSError, error:
693
except OSError as error:
364
694
if error.errno != errno.ESRCH: # No such process
365
695
raise
366
696
self.checker = None
367
def still_valid(self):
368
"""Has the timeout not yet passed for this client?"""
369
now = datetime.datetime.now()
370
if self.last_checked_ok is None:
371
return now < (self.created + self.timeout)
372
else:
373
return now < (self.last_checked_ok + self.timeout)
374
375
376
def peer_certificate(session):
377
"Return the peer's OpenPGP certificate as a bytestring"
378
# If not an OpenPGP certificate...
379
if gnutls.library.functions.gnutls_certificate_type_get\
380
(session._c_object) \
381
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
382
# ...do the normal thing
383
return session.peer_certificate
384
list_size = ctypes.c_uint()
385
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
386
(session._c_object, ctypes.byref(list_size))
387
if list_size.value == 0:
388
return None
389
cert = cert_list[0]
390
return ctypes.string_at(cert.data, cert.size)
391
392
393
def fingerprint(openpgp):
394
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
395
# New GnuTLS "datum" with the OpenPGP public key
396
datum = gnutls.library.types.gnutls_datum_t\
397
(ctypes.cast(ctypes.c_char_p(openpgp),
398
ctypes.POINTER(ctypes.c_ubyte)),
399
ctypes.c_uint(len(openpgp)))
400
# New empty GnuTLS certificate
401
crt = gnutls.library.types.gnutls_openpgp_crt_t()
402
gnutls.library.functions.gnutls_openpgp_crt_init\
403
(ctypes.byref(crt))
404
# Import the OpenPGP public key into the certificate
405
gnutls.library.functions.gnutls_openpgp_crt_import\
406
(crt, ctypes.byref(datum),
407
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
408
# New buffer for the fingerprint
409
buffer = ctypes.create_string_buffer(20)
410
buffer_length = ctypes.c_size_t()
411
# Get the fingerprint from the certificate into the buffer
412
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
413
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
414
# Deinit the certificate
415
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
416
# Convert the buffer to a Python bytestring
417
fpr = ctypes.string_at(buffer, buffer_length.value)
418
# Convert the bytestring to hexadecimal notation
419
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
420
return hex_fpr
421
422
423
class tcp_handler(SocketServer.BaseRequestHandler, object):
424
"""A TCP request handler class.
425
Instantiated by IPv6_TCPServer for each request to handle it.
697
698
699
def dbus_service_property(dbus_interface, signature="v",
700
access="readwrite", byte_arrays=False):
701
"""Decorators for marking methods of a DBusObjectWithProperties to
702
become properties on the D-Bus.
703
704
The decorated method will be called with no arguments by "Get"
705
and with one argument by "Set".
706
707
The parameters, where they are supported, are the same as
708
dbus.service.method, except there is only "signature", since the
709
type from Get() and the type sent to Set() is the same.
710
"""
711
# Encoding deeply encoded byte arrays is not supported yet by the
712
# "Set" method, so we fail early here:
713
if byte_arrays and signature != "ay":
714
raise ValueError("Byte arrays not supported for non-'ay'"
715
" signature %r" % signature)
716
def decorator(func):
717
func._dbus_is_property = True
718
func._dbus_interface = dbus_interface
719
func._dbus_signature = signature
720
func._dbus_access = access
721
func._dbus_name = func.__name__
722
if func._dbus_name.endswith("_dbus_property"):
723
func._dbus_name = func._dbus_name[:-14]
724
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
725
return func
726
return decorator
727
728
729
class DBusPropertyException(dbus.exceptions.DBusException):
730
"""A base class for D-Bus property-related exceptions
731
"""
732
def __unicode__(self):
733
return unicode(str(self))
734
735
736
class DBusPropertyAccessException(DBusPropertyException):
737
"""A property's access permissions disallows an operation.
738
"""
739
pass
740
741
742
class DBusPropertyNotFound(DBusPropertyException):
743
"""An attempt was made to access a non-existing property.
744
"""
745
pass
746
747
748
class DBusObjectWithProperties(dbus.service.Object):
749
"""A D-Bus object with properties.
750
751
Classes inheriting from this can use the dbus_service_property
752
decorator to expose methods as D-Bus properties. It exposes the
753
standard Get(), Set(), and GetAll() methods on the D-Bus.
754
"""
755
756
@staticmethod
757
def _is_dbus_property(obj):
758
return getattr(obj, "_dbus_is_property", False)
759
760
def _get_all_dbus_properties(self):
761
"""Returns a generator of (name, attribute) pairs
762
"""
763
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
764
for cls in self.__class__.__mro__
765
for name, prop in
766
inspect.getmembers(cls, self._is_dbus_property))
767
768
def _get_dbus_property(self, interface_name, property_name):
769
"""Returns a bound method if one exists which is a D-Bus
770
property with the specified name and interface.
771
"""
772
for cls in self.__class__.__mro__:
773
for name, value in (inspect.getmembers
774
(cls, self._is_dbus_property)):
775
if (value._dbus_name == property_name
776
and value._dbus_interface == interface_name):
777
return value.__get__(self)
778
779
# No such property
780
raise DBusPropertyNotFound(self.dbus_object_path + ":"
781
+ interface_name + "."
782
+ property_name)
783
784
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
785
out_signature="v")
786
def Get(self, interface_name, property_name):
787
"""Standard D-Bus property Get() method, see D-Bus standard.
788
"""
789
prop = self._get_dbus_property(interface_name, property_name)
790
if prop._dbus_access == "write":
791
raise DBusPropertyAccessException(property_name)
792
value = prop()
793
if not hasattr(value, "variant_level"):
794
return value
795
return type(value)(value, variant_level=value.variant_level+1)
796
797
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
798
def Set(self, interface_name, property_name, value):
799
"""Standard D-Bus property Set() method, see D-Bus standard.
800
"""
801
prop = self._get_dbus_property(interface_name, property_name)
802
if prop._dbus_access == "read":
803
raise DBusPropertyAccessException(property_name)
804
if prop._dbus_get_args_options["byte_arrays"]:
805
# The byte_arrays option is not supported yet on
806
# signatures other than "ay".
807
if prop._dbus_signature != "ay":
808
raise ValueError
809
value = dbus.ByteArray(''.join(unichr(byte)
810
for byte in value))
811
prop(value)
812
813
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
814
out_signature="a{sv}")
815
def GetAll(self, interface_name):
816
"""Standard D-Bus property GetAll() method, see D-Bus
817
standard.
818
819
Note: Will not include properties with access="write".
820
"""
821
properties = {}
822
for name, prop in self._get_all_dbus_properties():
823
if (interface_name
824
and interface_name != prop._dbus_interface):
825
# Interface non-empty but did not match
826
continue
827
# Ignore write-only properties
828
if prop._dbus_access == "write":
829
continue
830
value = prop()
831
if not hasattr(value, "variant_level"):
832
properties[name] = value
833
continue
834
properties[name] = type(value)(value, variant_level=
835
value.variant_level+1)
836
return dbus.Dictionary(properties, signature="sv")
837
838
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
839
out_signature="s",
840
path_keyword='object_path',
841
connection_keyword='connection')
842
def Introspect(self, object_path, connection):
843
"""Standard D-Bus method, overloaded to insert property tags.
844
"""
845
xmlstring = dbus.service.Object.Introspect(self, object_path,
846
connection)
847
try:
848
document = xml.dom.minidom.parseString(xmlstring)
849
def make_tag(document, name, prop):
850
e = document.createElement("property")
851
e.setAttribute("name", name)
852
e.setAttribute("type", prop._dbus_signature)
853
e.setAttribute("access", prop._dbus_access)
854
return e
855
for if_tag in document.getElementsByTagName("interface"):
856
for tag in (make_tag(document, name, prop)
857
for name, prop
858
in self._get_all_dbus_properties()
859
if prop._dbus_interface
860
== if_tag.getAttribute("name")):
861
if_tag.appendChild(tag)
862
# Add the names to the return values for the
863
# "org.freedesktop.DBus.Properties" methods
864
if (if_tag.getAttribute("name")
865
== "org.freedesktop.DBus.Properties"):
866
for cn in if_tag.getElementsByTagName("method"):
867
if cn.getAttribute("name") == "Get":
868
for arg in cn.getElementsByTagName("arg"):
869
if (arg.getAttribute("direction")
870
== "out"):
871
arg.setAttribute("name", "value")
872
elif cn.getAttribute("name") == "GetAll":
873
for arg in cn.getElementsByTagName("arg"):
874
if (arg.getAttribute("direction")
875
== "out"):
876
arg.setAttribute("name", "props")
877
xmlstring = document.toxml("utf-8")
878
document.unlink()
879
except (AttributeError, xml.dom.DOMException,
880
xml.parsers.expat.ExpatError) as error:
881
logger.error("Failed to override Introspection method",
882
error)
883
return xmlstring
884
885
886
def datetime_to_dbus (dt, variant_level=0):
887
"""Convert a UTC datetime.datetime() to a D-Bus type."""
888
if dt is None:
889
return dbus.String("", variant_level = variant_level)
890
return dbus.String(dt.isoformat(),
891
variant_level=variant_level)
892
893
894
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
895
.__metaclass__):
896
"""Applied to an empty subclass of a D-Bus object, this metaclass
897
will add additional D-Bus attributes matching a certain pattern.
898
"""
899
def __new__(mcs, name, bases, attr):
900
# Go through all the base classes which could have D-Bus
901
# methods, signals, or properties in them
902
for base in (b for b in bases
903
if issubclass(b, dbus.service.Object)):
904
# Go though all attributes of the base class
905
for attrname, attribute in inspect.getmembers(base):
906
# Ignore non-D-Bus attributes, and D-Bus attributes
907
# with the wrong interface name
908
if (not hasattr(attribute, "_dbus_interface")
909
or not attribute._dbus_interface
910
.startswith("se.recompile.Mandos")):
911
continue
912
# Create an alternate D-Bus interface name based on
913
# the current name
914
alt_interface = (attribute._dbus_interface
915
.replace("se.recompile.Mandos",
916
"se.bsnet.fukt.Mandos"))
917
# Is this a D-Bus signal?
918
if getattr(attribute, "_dbus_is_signal", False):
919
# Extract the original non-method function by
920
# black magic
921
nonmethod_func = (dict(
922
zip(attribute.func_code.co_freevars,
923
attribute.__closure__))["func"]
924
.cell_contents)
925
# Create a new, but exactly alike, function
926
# object, and decorate it to be a new D-Bus signal
927
# with the alternate D-Bus interface name
928
new_function = (dbus.service.signal
929
(alt_interface,
930
attribute._dbus_signature)
931
(types.FunctionType(
932
nonmethod_func.func_code,
933
nonmethod_func.func_globals,
934
nonmethod_func.func_name,
935
nonmethod_func.func_defaults,
936
nonmethod_func.func_closure)))
937
# Define a creator of a function to call both the
938
# old and new functions, so both the old and new
939
# signals gets sent when the function is called
940
def fixscope(func1, func2):
941
"""This function is a scope container to pass
942
func1 and func2 to the "call_both" function
943
outside of its arguments"""
944
def call_both(*args, **kwargs):
945
"""This function will emit two D-Bus
946
signals by calling func1 and func2"""
947
func1(*args, **kwargs)
948
func2(*args, **kwargs)
949
return call_both
950
# Create the "call_both" function and add it to
951
# the class
952
attr[attrname] = fixscope(attribute,
953
new_function)
954
# Is this a D-Bus method?
955
elif getattr(attribute, "_dbus_is_method", False):
956
# Create a new, but exactly alike, function
957
# object. Decorate it to be a new D-Bus method
958
# with the alternate D-Bus interface name. Add it
959
# to the class.
960
attr[attrname] = (dbus.service.method
961
(alt_interface,
962
attribute._dbus_in_signature,
963
attribute._dbus_out_signature)
964
(types.FunctionType
965
(attribute.func_code,
966
attribute.func_globals,
967
attribute.func_name,
968
attribute.func_defaults,
969
attribute.func_closure)))
970
# Is this a D-Bus property?
971
elif getattr(attribute, "_dbus_is_property", False):
972
# Create a new, but exactly alike, function
973
# object, and decorate it to be a new D-Bus
974
# property with the alternate D-Bus interface
975
# name. Add it to the class.
976
attr[attrname] = (dbus_service_property
977
(alt_interface,
978
attribute._dbus_signature,
979
attribute._dbus_access,
980
attribute
981
._dbus_get_args_options
982
["byte_arrays"])
983
(types.FunctionType
984
(attribute.func_code,
985
attribute.func_globals,
986
attribute.func_name,
987
attribute.func_defaults,
988
attribute.func_closure)))
989
return type.__new__(mcs, name, bases, attr)
990
991
992
class ClientDBus(Client, DBusObjectWithProperties):
993
"""A Client class using D-Bus
994
995
Attributes:
996
dbus_object_path: dbus.ObjectPath
997
bus: dbus.SystemBus()
998
"""
999
1000
runtime_expansions = (Client.runtime_expansions
1001
+ ("dbus_object_path",))
1002
1003
# dbus.service.Object doesn't use super(), so we can't either.
1004
1005
def __init__(self, bus = None, *args, **kwargs):
1006
self.bus = bus
1007
Client.__init__(self, *args, **kwargs)
1008
1009
self._approvals_pending = 0
1010
# Only now, when this client is initialized, can it show up on
1011
# the D-Bus
1012
client_object_name = unicode(self.name).translate(
1013
{ord("."): ord("_"),
1014
ord("-"): ord("_")})
1015
self.dbus_object_path = (dbus.ObjectPath
1016
("/clients/" + client_object_name))
1017
DBusObjectWithProperties.__init__(self, self.bus,
1018
self.dbus_object_path)
1019
1020
def notifychangeproperty(transform_func,
1021
dbus_name, type_func=lambda x: x,
1022
variant_level=1):
1023
""" Modify a variable so that it's a property which announces
1024
its changes to DBus.
1025
1026
transform_fun: Function that takes a value and a variant_level
1027
and transforms it to a D-Bus type.
1028
dbus_name: D-Bus name of the variable
1029
type_func: Function that transform the value before sending it
1030
to the D-Bus. Default: no transform
1031
variant_level: D-Bus variant level. Default: 1
1032
"""
1033
attrname = "_{0}".format(dbus_name)
1034
def setter(self, value):
1035
if hasattr(self, "dbus_object_path"):
1036
if (not hasattr(self, attrname) or
1037
type_func(getattr(self, attrname, None))
1038
!= type_func(value)):
1039
dbus_value = transform_func(type_func(value),
1040
variant_level
1041
=variant_level)
1042
self.PropertyChanged(dbus.String(dbus_name),
1043
dbus_value)
1044
setattr(self, attrname, value)
1045
1046
return property(lambda self: getattr(self, attrname), setter)
1047
1048
1049
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1050
approvals_pending = notifychangeproperty(dbus.Boolean,
1051
"ApprovalPending",
1052
type_func = bool)
1053
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1054
last_enabled = notifychangeproperty(datetime_to_dbus,
1055
"LastEnabled")
1056
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1057
type_func = lambda checker:
1058
checker is not None)
1059
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1060
"LastCheckedOK")
1061
last_approval_request = notifychangeproperty(
1062
datetime_to_dbus, "LastApprovalRequest")
1063
approved_by_default = notifychangeproperty(dbus.Boolean,
1064
"ApprovedByDefault")
1065
approval_delay = notifychangeproperty(dbus.UInt16,
1066
"ApprovalDelay",
1067
type_func =
1068
_timedelta_to_milliseconds)
1069
approval_duration = notifychangeproperty(
1070
dbus.UInt16, "ApprovalDuration",
1071
type_func = _timedelta_to_milliseconds)
1072
host = notifychangeproperty(dbus.String, "Host")
1073
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1074
type_func =
1075
_timedelta_to_milliseconds)
1076
extended_timeout = notifychangeproperty(
1077
dbus.UInt16, "ExtendedTimeout",
1078
type_func = _timedelta_to_milliseconds)
1079
interval = notifychangeproperty(dbus.UInt16,
1080
"Interval",
1081
type_func =
1082
_timedelta_to_milliseconds)
1083
checker_command = notifychangeproperty(dbus.String, "Checker")
1084
1085
del notifychangeproperty
1086
1087
def __del__(self, *args, **kwargs):
1088
try:
1089
self.remove_from_connection()
1090
except LookupError:
1091
pass
1092
if hasattr(DBusObjectWithProperties, "__del__"):
1093
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1094
Client.__del__(self, *args, **kwargs)
1095
1096
def checker_callback(self, pid, condition, command,
1097
*args, **kwargs):
1098
self.checker_callback_tag = None
1099
self.checker = None
1100
if os.WIFEXITED(condition):
1101
exitstatus = os.WEXITSTATUS(condition)
1102
# Emit D-Bus signal
1103
self.CheckerCompleted(dbus.Int16(exitstatus),
1104
dbus.Int64(condition),
1105
dbus.String(command))
1106
else:
1107
# Emit D-Bus signal
1108
self.CheckerCompleted(dbus.Int16(-1),
1109
dbus.Int64(condition),
1110
dbus.String(command))
1111
1112
return Client.checker_callback(self, pid, condition, command,
1113
*args, **kwargs)
1114
1115
def start_checker(self, *args, **kwargs):
1116
old_checker = self.checker
1117
if self.checker is not None:
1118
old_checker_pid = self.checker.pid
1119
else:
1120
old_checker_pid = None
1121
r = Client.start_checker(self, *args, **kwargs)
1122
# Only if new checker process was started
1123
if (self.checker is not None
1124
and old_checker_pid != self.checker.pid):
1125
# Emit D-Bus signal
1126
self.CheckerStarted(self.current_checker_command)
1127
return r
1128
1129
def _reset_approved(self):
1130
self._approved = None
1131
return False
1132
1133
def approve(self, value=True):
1134
self.send_changedstate()
1135
self._approved = value
1136
gobject.timeout_add(_timedelta_to_milliseconds
1137
(self.approval_duration),
1138
self._reset_approved)
1139
1140
1141
## D-Bus methods, signals & properties
1142
_interface = "se.recompile.Mandos.Client"
1143
1144
## Signals
1145
1146
# CheckerCompleted - signal
1147
@dbus.service.signal(_interface, signature="nxs")
1148
def CheckerCompleted(self, exitcode, waitstatus, command):
1149
"D-Bus signal"
1150
pass
1151
1152
# CheckerStarted - signal
1153
@dbus.service.signal(_interface, signature="s")
1154
def CheckerStarted(self, command):
1155
"D-Bus signal"
1156
pass
1157
1158
# PropertyChanged - signal
1159
@dbus.service.signal(_interface, signature="sv")
1160
def PropertyChanged(self, property, value):
1161
"D-Bus signal"
1162
pass
1163
1164
# GotSecret - signal
1165
@dbus.service.signal(_interface)
1166
def GotSecret(self):
1167
"""D-Bus signal
1168
Is sent after a successful transfer of secret from the Mandos
1169
server to mandos-client
1170
"""
1171
pass
1172
1173
# Rejected - signal
1174
@dbus.service.signal(_interface, signature="s")
1175
def Rejected(self, reason):
1176
"D-Bus signal"
1177
pass
1178
1179
# NeedApproval - signal
1180
@dbus.service.signal(_interface, signature="tb")
1181
def NeedApproval(self, timeout, default):
1182
"D-Bus signal"
1183
return self.need_approval()
1184
1185
# NeRwequest - signal
1186
@dbus.service.signal(_interface, signature="s")
1187
def NewRequest(self, ip):
1188
"""D-Bus signal
1189
Is sent after a client request a password.
1190
"""
1191
pass
1192
1193
## Methods
1194
1195
# Approve - method
1196
@dbus.service.method(_interface, in_signature="b")
1197
def Approve(self, value):
1198
self.approve(value)
1199
1200
# CheckedOK - method
1201
@dbus.service.method(_interface)
1202
def CheckedOK(self):
1203
self.checked_ok()
1204
1205
# Enable - method
1206
@dbus.service.method(_interface)
1207
def Enable(self):
1208
"D-Bus method"
1209
self.enable()
1210
1211
# StartChecker - method
1212
@dbus.service.method(_interface)
1213
def StartChecker(self):
1214
"D-Bus method"
1215
self.start_checker()
1216
1217
# Disable - method
1218
@dbus.service.method(_interface)
1219
def Disable(self):
1220
"D-Bus method"
1221
self.disable()
1222
1223
# StopChecker - method
1224
@dbus.service.method(_interface)
1225
def StopChecker(self):
1226
self.stop_checker()
1227
1228
## Properties
1229
1230
# ApprovalPending - property
1231
@dbus_service_property(_interface, signature="b", access="read")
1232
def ApprovalPending_dbus_property(self):
1233
return dbus.Boolean(bool(self.approvals_pending))
1234
1235
# ApprovedByDefault - property
1236
@dbus_service_property(_interface, signature="b",
1237
access="readwrite")
1238
def ApprovedByDefault_dbus_property(self, value=None):
1239
if value is None: # get
1240
return dbus.Boolean(self.approved_by_default)
1241
self.approved_by_default = bool(value)
1242
1243
# ApprovalDelay - property
1244
@dbus_service_property(_interface, signature="t",
1245
access="readwrite")
1246
def ApprovalDelay_dbus_property(self, value=None):
1247
if value is None: # get
1248
return dbus.UInt64(self.approval_delay_milliseconds())
1249
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1250
1251
# ApprovalDuration - property
1252
@dbus_service_property(_interface, signature="t",
1253
access="readwrite")
1254
def ApprovalDuration_dbus_property(self, value=None):
1255
if value is None: # get
1256
return dbus.UInt64(_timedelta_to_milliseconds(
1257
self.approval_duration))
1258
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1259
1260
# Name - property
1261
@dbus_service_property(_interface, signature="s", access="read")
1262
def Name_dbus_property(self):
1263
return dbus.String(self.name)
1264
1265
# Fingerprint - property
1266
@dbus_service_property(_interface, signature="s", access="read")
1267
def Fingerprint_dbus_property(self):
1268
return dbus.String(self.fingerprint)
1269
1270
# Host - property
1271
@dbus_service_property(_interface, signature="s",
1272
access="readwrite")
1273
def Host_dbus_property(self, value=None):
1274
if value is None: # get
1275
return dbus.String(self.host)
1276
self.host = value
1277
1278
# Created - property
1279
@dbus_service_property(_interface, signature="s", access="read")
1280
def Created_dbus_property(self):
1281
return dbus.String(datetime_to_dbus(self.created))
1282
1283
# LastEnabled - property
1284
@dbus_service_property(_interface, signature="s", access="read")
1285
def LastEnabled_dbus_property(self):
1286
return datetime_to_dbus(self.last_enabled)
1287
1288
# Enabled - property
1289
@dbus_service_property(_interface, signature="b",
1290
access="readwrite")
1291
def Enabled_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.Boolean(self.enabled)
1294
if value:
1295
self.enable()
1296
else:
1297
self.disable()
1298
1299
# LastCheckedOK - property
1300
@dbus_service_property(_interface, signature="s",
1301
access="readwrite")
1302
def LastCheckedOK_dbus_property(self, value=None):
1303
if value is not None:
1304
self.checked_ok()
1305
return
1306
return datetime_to_dbus(self.last_checked_ok)
1307
1308
# Expires - property
1309
@dbus_service_property(_interface, signature="s", access="read")
1310
def Expires_dbus_property(self):
1311
return datetime_to_dbus(self.expires)
1312
1313
# LastApprovalRequest - property
1314
@dbus_service_property(_interface, signature="s", access="read")
1315
def LastApprovalRequest_dbus_property(self):
1316
return datetime_to_dbus(self.last_approval_request)
1317
1318
# Timeout - property
1319
@dbus_service_property(_interface, signature="t",
1320
access="readwrite")
1321
def Timeout_dbus_property(self, value=None):
1322
if value is None: # get
1323
return dbus.UInt64(self.timeout_milliseconds())
1324
self.timeout = datetime.timedelta(0, 0, 0, value)
1325
if getattr(self, "disable_initiator_tag", None) is None:
1326
return
1327
# Reschedule timeout
1328
gobject.source_remove(self.disable_initiator_tag)
1329
self.disable_initiator_tag = None
1330
self.expires = None
1331
time_to_die = _timedelta_to_milliseconds((self
1332
.last_checked_ok
1333
+ self.timeout)
1334
- datetime.datetime
1335
.utcnow())
1336
if time_to_die <= 0:
1337
# The timeout has passed
1338
self.disable()
1339
else:
1340
self.expires = (datetime.datetime.utcnow()
1341
+ datetime.timedelta(milliseconds =
1342
time_to_die))
1343
self.disable_initiator_tag = (gobject.timeout_add
1344
(time_to_die, self.disable))
1345
1346
# ExtendedTimeout - property
1347
@dbus_service_property(_interface, signature="t",
1348
access="readwrite")
1349
def ExtendedTimeout_dbus_property(self, value=None):
1350
if value is None: # get
1351
return dbus.UInt64(self.extended_timeout_milliseconds())
1352
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1353
1354
# Interval - property
1355
@dbus_service_property(_interface, signature="t",
1356
access="readwrite")
1357
def Interval_dbus_property(self, value=None):
1358
if value is None: # get
1359
return dbus.UInt64(self.interval_milliseconds())
1360
self.interval = datetime.timedelta(0, 0, 0, value)
1361
if getattr(self, "checker_initiator_tag", None) is None:
1362
return
1363
# Reschedule checker run
1364
gobject.source_remove(self.checker_initiator_tag)
1365
self.checker_initiator_tag = (gobject.timeout_add
1366
(value, self.start_checker))
1367
self.start_checker() # Start one now, too
1368
1369
# Checker - property
1370
@dbus_service_property(_interface, signature="s",
1371
access="readwrite")
1372
def Checker_dbus_property(self, value=None):
1373
if value is None: # get
1374
return dbus.String(self.checker_command)
1375
self.checker_command = value
1376
1377
# CheckerRunning - property
1378
@dbus_service_property(_interface, signature="b",
1379
access="readwrite")
1380
def CheckerRunning_dbus_property(self, value=None):
1381
if value is None: # get
1382
return dbus.Boolean(self.checker is not None)
1383
if value:
1384
self.start_checker()
1385
else:
1386
self.stop_checker()
1387
1388
# ObjectPath - property
1389
@dbus_service_property(_interface, signature="o", access="read")
1390
def ObjectPath_dbus_property(self):
1391
return self.dbus_object_path # is already a dbus.ObjectPath
1392
1393
# Secret = property
1394
@dbus_service_property(_interface, signature="ay",
1395
access="write", byte_arrays=True)
1396
def Secret_dbus_property(self, value):
1397
self.secret = str(value)
1398
1399
del _interface
1400
1401
1402
class ProxyClient(object):
1403
def __init__(self, child_pipe, fpr, address):
1404
self._pipe = child_pipe
1405
self._pipe.send(('init', fpr, address))
1406
if not self._pipe.recv():
1407
raise KeyError()
1408
1409
def __getattribute__(self, name):
1410
if(name == '_pipe'):
1411
return super(ProxyClient, self).__getattribute__(name)
1412
self._pipe.send(('getattr', name))
1413
data = self._pipe.recv()
1414
if data[0] == 'data':
1415
return data[1]
1416
if data[0] == 'function':
1417
def func(*args, **kwargs):
1418
self._pipe.send(('funcall', name, args, kwargs))
1419
return self._pipe.recv()[1]
1420
return func
1421
1422
def __setattr__(self, name, value):
1423
if(name == '_pipe'):
1424
return super(ProxyClient, self).__setattr__(name, value)
1425
self._pipe.send(('setattr', name, value))
1426
1427
1428
class ClientDBusTransitional(ClientDBus):
1429
__metaclass__ = AlternateDBusNamesMetaclass
1430
1431
1432
class ClientHandler(socketserver.BaseRequestHandler, object):
1433
"""A class to handle client connections.
1434
1435
Instantiated once for each connection to handle it.
426
1436
Note: This will run in its own forked process."""
427
1437
428
1438
def handle(self):
429
logger.info(u"TCP connection from: %s",
430
unicode(self.client_address))
431
session = gnutls.connection.ClientSession\
432
(self.request, gnutls.connection.X509Credentials())
433
434
line = self.request.makefile().readline()
435
logger.debug(u"Protocol version: %r", line)
436
try:
437
if int(line.strip().split()[0]) > 1:
438
raise RuntimeError
439
except (ValueError, IndexError, RuntimeError), error:
440
logger.error(u"Unknown protocol version: %s", error)
441
return
442
443
# Note: gnutls.connection.X509Credentials is really a generic
444
# GnuTLS certificate credentials object so long as no X.509
445
# keys are added to it. Therefore, we can use it here despite
446
# using OpenPGP certificates.
447
448
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
449
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
450
# "+DHE-DSS"))
451
priority = "NORMAL" # Fallback default, since this
452
# MUST be set.
453
if self.server.settings["priority"]:
454
priority = self.server.settings["priority"]
455
gnutls.library.functions.gnutls_priority_set_direct\
456
(session._c_object, priority, None);
457
458
try:
459
session.handshake()
460
except gnutls.errors.GNUTLSError, error:
461
logger.warning(u"Handshake failed: %s", error)
462
# Do not run session.bye() here: the session is not
463
# established. Just abandon the request.
464
return
465
try:
466
fpr = fingerprint(peer_certificate(session))
467
except (TypeError, gnutls.errors.GNUTLSError), error:
468
logger.warning(u"Bad certificate: %s", error)
469
session.bye()
470
return
471
logger.debug(u"Fingerprint: %s", fpr)
472
client = None
473
for c in self.server.clients:
474
if c.fingerprint == fpr:
475
client = c
476
break
477
if not client:
478
logger.warning(u"Client not found for fingerprint: %s",
479
fpr)
480
session.bye()
481
return
482
# Have to check if client.still_valid(), since it is possible
483
# that the client timed out while establishing the GnuTLS
484
# session.
485
if not client.still_valid():
486
logger.warning(u"Client %(name)s is invalid",
487
vars(client))
488
session.bye()
489
return
490
sent_size = 0
491
while sent_size < len(client.secret):
492
sent = session.send(client.secret[sent_size:])
493
logger.debug(u"Sent: %d, remaining: %d",
494
sent, len(client.secret)
495
- (sent_size + sent))
496
sent_size += sent
497
session.bye()
498
499
500
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
501
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1439
with contextlib.closing(self.server.child_pipe) as child_pipe:
1440
logger.info("TCP connection from: %s",
1441
unicode(self.client_address))
1442
logger.debug("Pipe FD: %d",
1443
self.server.child_pipe.fileno())
1444
1445
session = (gnutls.connection
1446
.ClientSession(self.request,
1447
gnutls.connection
1448
.X509Credentials()))
1449
1450
# Note: gnutls.connection.X509Credentials is really a
1451
# generic GnuTLS certificate credentials object so long as
1452
# no X.509 keys are added to it. Therefore, we can use it
1453
# here despite using OpenPGP certificates.
1454
1455
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1456
# "+AES-256-CBC", "+SHA1",
1457
# "+COMP-NULL", "+CTYPE-OPENPGP",
1458
# "+DHE-DSS"))
1459
# Use a fallback default, since this MUST be set.
1460
priority = self.server.gnutls_priority
1461
if priority is None:
1462
priority = "NORMAL"
1463
(gnutls.library.functions
1464
.gnutls_priority_set_direct(session._c_object,
1465
priority, None))
1466
1467
# Start communication using the Mandos protocol
1468
# Get protocol number
1469
line = self.request.makefile().readline()
1470
logger.debug("Protocol version: %r", line)
1471
try:
1472
if int(line.strip().split()[0]) > 1:
1473
raise RuntimeError
1474
except (ValueError, IndexError, RuntimeError) as error:
1475
logger.error("Unknown protocol version: %s", error)
1476
return
1477
1478
# Start GnuTLS connection
1479
try:
1480
session.handshake()
1481
except gnutls.errors.GNUTLSError as error:
1482
logger.warning("Handshake failed: %s", error)
1483
# Do not run session.bye() here: the session is not
1484
# established. Just abandon the request.
1485
return
1486
logger.debug("Handshake succeeded")
1487
1488
approval_required = False
1489
try:
1490
try:
1491
fpr = self.fingerprint(self.peer_certificate
1492
(session))
1493
except (TypeError,
1494
gnutls.errors.GNUTLSError) as error:
1495
logger.warning("Bad certificate: %s", error)
1496
return
1497
logger.debug("Fingerprint: %s", fpr)
1498
if self.server.use_dbus:
1499
# Emit D-Bus signal
1500
client.NewRequest(str(self.client_address))
1501
1502
try:
1503
client = ProxyClient(child_pipe, fpr,
1504
self.client_address)
1505
except KeyError:
1506
return
1507
1508
if client.approval_delay:
1509
delay = client.approval_delay
1510
client.approvals_pending += 1
1511
approval_required = True
1512
1513
while True:
1514
if not client.enabled:
1515
logger.info("Client %s is disabled",
1516
client.name)
1517
if self.server.use_dbus:
1518
# Emit D-Bus signal
1519
client.Rejected("Disabled")
1520
return
1521
1522
if client._approved or not client.approval_delay:
1523
#We are approved or approval is disabled
1524
break
1525
elif client._approved is None:
1526
logger.info("Client %s needs approval",
1527
client.name)
1528
if self.server.use_dbus:
1529
# Emit D-Bus signal
1530
client.NeedApproval(
1531
client.approval_delay_milliseconds(),
1532
client.approved_by_default)
1533
else:
1534
logger.warning("Client %s was not approved",
1535
client.name)
1536
if self.server.use_dbus:
1537
# Emit D-Bus signal
1538
client.Rejected("Denied")
1539
return
1540
1541
#wait until timeout or approved
1542
time = datetime.datetime.now()
1543
client.changedstate.acquire()
1544
(client.changedstate.wait
1545
(float(client._timedelta_to_milliseconds(delay)
1546
/ 1000)))
1547
client.changedstate.release()
1548
time2 = datetime.datetime.now()
1549
if (time2 - time) >= delay:
1550
if not client.approved_by_default:
1551
logger.warning("Client %s timed out while"
1552
" waiting for approval",
1553
client.name)
1554
if self.server.use_dbus:
1555
# Emit D-Bus signal
1556
client.Rejected("Approval timed out")
1557
return
1558
else:
1559
break
1560
else:
1561
delay -= time2 - time
1562
1563
sent_size = 0
1564
while sent_size < len(client.secret):
1565
try:
1566
sent = session.send(client.secret[sent_size:])
1567
except gnutls.errors.GNUTLSError as error:
1568
logger.warning("gnutls send failed")
1569
return
1570
logger.debug("Sent: %d, remaining: %d",
1571
sent, len(client.secret)
1572
- (sent_size + sent))
1573
sent_size += sent
1574
1575
logger.info("Sending secret to %s", client.name)
1576
# bump the timeout using extended_timeout
1577
client.checked_ok(client.extended_timeout)
1578
if self.server.use_dbus:
1579
# Emit D-Bus signal
1580
client.GotSecret()
1581
1582
finally:
1583
if approval_required:
1584
client.approvals_pending -= 1
1585
try:
1586
session.bye()
1587
except gnutls.errors.GNUTLSError as error:
1588
logger.warning("GnuTLS bye failed")
1589
1590
@staticmethod
1591
def peer_certificate(session):
1592
"Return the peer's OpenPGP certificate as a bytestring"
1593
# If not an OpenPGP certificate...
1594
if (gnutls.library.functions
1595
.gnutls_certificate_type_get(session._c_object)
1596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1597
# ...do the normal thing
1598
return session.peer_certificate
1599
list_size = ctypes.c_uint(1)
1600
cert_list = (gnutls.library.functions
1601
.gnutls_certificate_get_peers
1602
(session._c_object, ctypes.byref(list_size)))
1603
if not bool(cert_list) and list_size.value != 0:
1604
raise gnutls.errors.GNUTLSError("error getting peer"
1605
" certificate")
1606
if list_size.value == 0:
1607
return None
1608
cert = cert_list[0]
1609
return ctypes.string_at(cert.data, cert.size)
1610
1611
@staticmethod
1612
def fingerprint(openpgp):
1613
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1614
# New GnuTLS "datum" with the OpenPGP public key
1615
datum = (gnutls.library.types
1616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1617
ctypes.POINTER
1618
(ctypes.c_ubyte)),
1619
ctypes.c_uint(len(openpgp))))
1620
# New empty GnuTLS certificate
1621
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1622
(gnutls.library.functions
1623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1624
# Import the OpenPGP public key into the certificate
1625
(gnutls.library.functions
1626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1627
gnutls.library.constants
1628
.GNUTLS_OPENPGP_FMT_RAW))
1629
# Verify the self signature in the key
1630
crtverify = ctypes.c_uint()
1631
(gnutls.library.functions
1632
.gnutls_openpgp_crt_verify_self(crt, 0,
1633
ctypes.byref(crtverify)))
1634
if crtverify.value != 0:
1635
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1636
raise (gnutls.errors.CertificateSecurityError
1637
("Verify failed"))
1638
# New buffer for the fingerprint
1639
buf = ctypes.create_string_buffer(20)
1640
buf_len = ctypes.c_size_t()
1641
# Get the fingerprint from the certificate into the buffer
1642
(gnutls.library.functions
1643
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1644
ctypes.byref(buf_len)))
1645
# Deinit the certificate
1646
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1647
# Convert the buffer to a Python bytestring
1648
fpr = ctypes.string_at(buf, buf_len.value)
1649
# Convert the bytestring to hexadecimal notation
1650
hex_fpr = binascii.hexlify(fpr).upper()
1651
return hex_fpr
1652
1653
1654
class MultiprocessingMixIn(object):
1655
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1656
def sub_process_main(self, request, address):
1657
try:
1658
self.finish_request(request, address)
1659
except:
1660
self.handle_error(request, address)
1661
self.close_request(request)
1662
1663
def process_request(self, request, address):
1664
"""Start a new process to process the request."""
1665
proc = multiprocessing.Process(target = self.sub_process_main,
1666
args = (request,
1667
address))
1668
proc.start()
1669
return proc
1670
1671
1672
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1673
""" adds a pipe to the MixIn """
1674
def process_request(self, request, client_address):
1675
"""Overrides and wraps the original process_request().
1676
1677
This function creates a new pipe in self.pipe
1678
"""
1679
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1680
1681
proc = MultiprocessingMixIn.process_request(self, request,
1682
client_address)
1683
self.child_pipe.close()
1684
self.add_pipe(parent_pipe, proc)
1685
1686
def add_pipe(self, parent_pipe, proc):
1687
"""Dummy function; override as necessary"""
1688
raise NotImplementedError
1689
1690
1691
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1692
socketserver.TCPServer, object):
1693
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1694
502
1695
Attributes:
503
settings: Server settings
504
clients: Set() of Client objects
1696
enabled: Boolean; whether this server is activated yet
1697
interface: None or a network interface name (string)
1698
use_ipv6: Boolean; to use IPv6 or not
505
1699
"""
506
address_family = socket.AF_INET6
507
def __init__(self, *args, **kwargs):
508
if "settings" in kwargs:
509
self.settings = kwargs["settings"]
510
del kwargs["settings"]
511
if "clients" in kwargs:
512
self.clients = kwargs["clients"]
513
del kwargs["clients"]
514
return super(type(self), self).__init__(*args, **kwargs)
1700
def __init__(self, server_address, RequestHandlerClass,
1701
interface=None, use_ipv6=True):
1702
self.interface = interface
1703
if use_ipv6:
1704
self.address_family = socket.AF_INET6
1705
socketserver.TCPServer.__init__(self, server_address,
1706
RequestHandlerClass)
515
1707
def server_bind(self):
516
1708
"""This overrides the normal server_bind() function
517
1709
to bind to an interface if one was specified, and also NOT to
518
1710
bind to an address or port if they were not specified."""
519
if self.settings["interface"]:
520
# 25 is from /usr/include/asm-i486/socket.h
521
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
522
try:
523
self.socket.setsockopt(socket.SOL_SOCKET,
524
SO_BINDTODEVICE,
525
self.settings["interface"])
526
except socket.error, error:
527
if error[0] == errno.EPERM:
528
logger.error(u"No permission to"
529
u" bind to interface %s",
530
self.settings["interface"])
531
else:
532
raise error
1711
if self.interface is not None:
1712
if SO_BINDTODEVICE is None:
1713
logger.error("SO_BINDTODEVICE does not exist;"
1714
" cannot bind to interface %s",
1715
self.interface)
1716
else:
1717
try:
1718
self.socket.setsockopt(socket.SOL_SOCKET,
1719
SO_BINDTODEVICE,
1720
str(self.interface
1721
+ '\0'))
1722
except socket.error as error:
1723
if error[0] == errno.EPERM:
1724
logger.error("No permission to"
1725
" bind to interface %s",
1726
self.interface)
1727
elif error[0] == errno.ENOPROTOOPT:
1728
logger.error("SO_BINDTODEVICE not available;"
1729
" cannot bind to interface %s",
1730
self.interface)
1731
else:
1732
raise
533
1733
# Only bind(2) the socket if we really need to.
534
1734
if self.server_address[0] or self.server_address[1]:
535
1735
if not self.server_address[0]:
536
in6addr_any = "::"
537
self.server_address = (in6addr_any,
1736
if self.address_family == socket.AF_INET6:
1737
any_address = "::" # in6addr_any
1738
else:
1739
any_address = socket.INADDR_ANY
1740
self.server_address = (any_address,
538
1741
self.server_address[1])
539
1742
elif not self.server_address[1]:
540
1743
self.server_address = (self.server_address[0],
541
1744
0)
542
# if self.settings["interface"]:
1745
# if self.interface:
543
1746
# self.server_address = (self.server_address[0],
544
1747
# 0, # port
545
1748
# 0, # flowinfo
546
1749
# if_nametoindex
547
# (self.settings
548
# ["interface"]))
549
return super(type(self), self).server_bind()
1750
# (self.interface))
1751
return socketserver.TCPServer.server_bind(self)
1752
1753
1754
class MandosServer(IPv6_TCPServer):
1755
"""Mandos server.
1756
1757
Attributes:
1758
clients: set of Client objects
1759
gnutls_priority GnuTLS priority string
1760
use_dbus: Boolean; to emit D-Bus signals or not
1761
1762
Assumes a gobject.MainLoop event loop.
1763
"""
1764
def __init__(self, server_address, RequestHandlerClass,
1765
interface=None, use_ipv6=True, clients=None,
1766
gnutls_priority=None, use_dbus=True):
1767
self.enabled = False
1768
self.clients = clients
1769
if self.clients is None:
1770
self.clients = {}
1771
self.use_dbus = use_dbus
1772
self.gnutls_priority = gnutls_priority
1773
IPv6_TCPServer.__init__(self, server_address,
1774
RequestHandlerClass,
1775
interface = interface,
1776
use_ipv6 = use_ipv6)
1777
def server_activate(self):
1778
if self.enabled:
1779
return socketserver.TCPServer.server_activate(self)
1780
1781
def enable(self):
1782
self.enabled = True
1783
1784
def add_pipe(self, parent_pipe, proc):
1785
# Call "handle_ipc" for both data and EOF events
1786
gobject.io_add_watch(parent_pipe.fileno(),
1787
gobject.IO_IN | gobject.IO_HUP,
1788
functools.partial(self.handle_ipc,
1789
parent_pipe =
1790
parent_pipe,
1791
proc = proc))
1792
1793
def handle_ipc(self, source, condition, parent_pipe=None,
1794
proc = None, client_object=None):
1795
condition_names = {
1796
gobject.IO_IN: "IN", # There is data to read.
1797
gobject.IO_OUT: "OUT", # Data can be written (without
1798
# blocking).
1799
gobject.IO_PRI: "PRI", # There is urgent data to read.
1800
gobject.IO_ERR: "ERR", # Error condition.
1801
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1802
# broken, usually for pipes and
1803
# sockets).
1804
}
1805
conditions_string = ' | '.join(name
1806
for cond, name in
1807
condition_names.iteritems()
1808
if cond & condition)
1809
# error, or the other end of multiprocessing.Pipe has closed
1810
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1811
# Wait for other process to exit
1812
proc.join()
1813
return False
1814
1815
# Read a request from the child
1816
request = parent_pipe.recv()
1817
command = request[0]
1818
1819
if command == 'init':
1820
fpr = request[1]
1821
address = request[2]
1822
1823
for c in self.clients.itervalues():
1824
if c.fingerprint == fpr:
1825
client = c
1826
break
1827
else:
1828
logger.info("Client not found for fingerprint: %s, ad"
1829
"dress: %s", fpr, address)
1830
if self.use_dbus:
1831
# Emit D-Bus signal
1832
mandos_dbus_service.ClientNotFound(fpr,
1833
address[0])
1834
parent_pipe.send(False)
1835
return False
1836
1837
gobject.io_add_watch(parent_pipe.fileno(),
1838
gobject.IO_IN | gobject.IO_HUP,
1839
functools.partial(self.handle_ipc,
1840
parent_pipe =
1841
parent_pipe,
1842
proc = proc,
1843
client_object =
1844
client))
1845
parent_pipe.send(True)
1846
# remove the old hook in favor of the new above hook on
1847
# same fileno
1848
return False
1849
if command == 'funcall':
1850
funcname = request[1]
1851
args = request[2]
1852
kwargs = request[3]
1853
1854
parent_pipe.send(('data', getattr(client_object,
1855
funcname)(*args,
1856
**kwargs)))
1857
1858
if command == 'getattr':
1859
attrname = request[1]
1860
if callable(client_object.__getattribute__(attrname)):
1861
parent_pipe.send(('function',))
1862
else:
1863
parent_pipe.send(('data', client_object
1864
.__getattribute__(attrname)))
1865
1866
if command == 'setattr':
1867
attrname = request[1]
1868
value = request[2]
1869
setattr(client_object, attrname, value)
1870
1871
return True
550
1872
551
1873
552
1874
def string_to_delta(interval):
553
1875
"""Parse a string and return a datetime.timedelta
554
1876
555
1877
>>> string_to_delta('7d')
556
1878
datetime.timedelta(7)
557
1879
>>> string_to_delta('60s')
560
1882
datetime.timedelta(0, 3600)
561
1883
>>> string_to_delta('24h')
562
1884
datetime.timedelta(1)
563
>>> string_to_delta(u'1w')
1885
>>> string_to_delta('1w')
564
1886
datetime.timedelta(7)
1887
>>> string_to_delta('5m 30s')
1888
datetime.timedelta(0, 330)
565
1889
"""
566
try:
567
suffix=unicode(interval[-1])
568
value=int(interval[:-1])
569
if suffix == u"d":
570
delta = datetime.timedelta(value)
571
elif suffix == u"s":
572
delta = datetime.timedelta(0, value)
573
elif suffix == u"m":
574
delta = datetime.timedelta(0, 0, 0, 0, value)
575
elif suffix == u"h":
576
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
577
elif suffix == u"w":
578
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
579
else:
580
raise ValueError
581
except (ValueError, IndexError):
582
raise ValueError
583
return delta
584
585
586
def server_state_changed(state):
587
"""Derived from the Avahi example code"""
588
if state == avahi.SERVER_COLLISION:
589
logger.error(u"Server name collision")
590
service.remove()
591
elif state == avahi.SERVER_RUNNING:
592
service.add()
593
594
595
def entry_group_state_changed(state, error):
596
"""Derived from the Avahi example code"""
597
logger.debug(u"state change: %i", state)
598
599
if state == avahi.ENTRY_GROUP_ESTABLISHED:
600
logger.debug(u"Service established.")
601
elif state == avahi.ENTRY_GROUP_COLLISION:
602
logger.warning(u"Service name collision.")
603
service.rename()
604
elif state == avahi.ENTRY_GROUP_FAILURE:
605
logger.critical(u"Error in group state changed %s",
606
unicode(error))
607
raise AvahiGroupError("State changed: %s", str(error))
608
609
def if_nametoindex(interface):
610
"""Call the C function if_nametoindex(), or equivalent"""
611
global if_nametoindex
612
try:
613
if "ctypes.util" not in sys.modules:
614
import ctypes.util
615
if_nametoindex = ctypes.cdll.LoadLibrary\
616
(ctypes.util.find_library("c")).if_nametoindex
617
except (OSError, AttributeError):
618
if "struct" not in sys.modules:
619
import struct
620
if "fcntl" not in sys.modules:
621
import fcntl
622
def if_nametoindex(interface):
623
"Get an interface index the hard way, i.e. using fcntl()"
624
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
625
s = socket.socket()
626
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
627
struct.pack("16s16x", interface))
628
s.close()
629
interface_index = struct.unpack("I", ifreq[16:20])[0]
630
return interface_index
631
return if_nametoindex(interface)
1890
timevalue = datetime.timedelta(0)
1891
for s in interval.split():
1892
try:
1893
suffix = unicode(s[-1])
1894
value = int(s[:-1])
1895
if suffix == "d":
1896
delta = datetime.timedelta(value)
1897
elif suffix == "s":
1898
delta = datetime.timedelta(0, value)
1899
elif suffix == "m":
1900
delta = datetime.timedelta(0, 0, 0, 0, value)
1901
elif suffix == "h":
1902
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1903
elif suffix == "w":
1904
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1905
else:
1906
raise ValueError("Unknown suffix %r" % suffix)
1907
except (ValueError, IndexError) as e:
1908
raise ValueError(*(e.args))
1909
timevalue += delta
1910
return timevalue
632
1911
633
1912
634
1913
def daemon(nochdir = False, noclose = False):
635
1914
"""See daemon(3). Standard BSD Unix function.
1915
636
1916
This should really exist as os.daemon, but it doesn't (yet)."""
637
1917
if os.fork():
638
1918
sys.exit()
646
1926
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
647
1927
if not stat.S_ISCHR(os.fstat(null).st_mode):
648
1928
raise OSError(errno.ENODEV,
649
"/dev/null not a character device")
1929
"%s not a character device"
1930
% os.path.devnull)
650
1931
os.dup2(null, sys.stdin.fileno())
651
1932
os.dup2(null, sys.stdout.fileno())
652
1933
os.dup2(null, sys.stderr.fileno())
655
1936
656
1937
657
1938
def main():
658
global main_loop_started
659
main_loop_started = False
660
661
parser = OptionParser(version = "%%prog %s" % version)
662
parser.add_option("-i", "--interface", type="string",
663
metavar="IF", help="Bind to interface IF")
664
parser.add_option("-a", "--address", type="string",
665
help="Address to listen for requests on")
666
parser.add_option("-p", "--port", type="int",
667
help="Port number to receive requests on")
668
parser.add_option("--check", action="store_true", default=False,
669
help="Run self-test")
670
parser.add_option("--debug", action="store_true",
671
help="Debug mode; run in foreground and log to"
672
" terminal")
673
parser.add_option("--priority", type="string", help="GnuTLS"
674
" priority string (see GnuTLS documentation)")
675
parser.add_option("--servicename", type="string", metavar="NAME",
676
help="Zeroconf service name")
677
parser.add_option("--configdir", type="string",
678
default="/etc/mandos", metavar="DIR",
679
help="Directory to search for configuration"
680
" files")
681
(options, args) = parser.parse_args()
1939
1940
##################################################################
1941
# Parsing of options, both command line and config file
1942
1943
parser = argparse.ArgumentParser()
1944
parser.add_argument("-v", "--version", action="version",
1945
version = "%%(prog)s %s" % version,
1946
help="show version number and exit")
1947
parser.add_argument("-i", "--interface", metavar="IF",
1948
help="Bind to interface IF")
1949
parser.add_argument("-a", "--address",
1950
help="Address to listen for requests on")
1951
parser.add_argument("-p", "--port", type=int,
1952
help="Port number to receive requests on")
1953
parser.add_argument("--check", action="store_true",
1954
help="Run self-test")
1955
parser.add_argument("--debug", action="store_true",
1956
help="Debug mode; run in foreground and log"
1957
" to terminal")
1958
parser.add_argument("--debuglevel", metavar="LEVEL",
1959
help="Debug level for stdout output")
1960
parser.add_argument("--priority", help="GnuTLS"
1961
" priority string (see GnuTLS documentation)")
1962
parser.add_argument("--servicename",
1963
metavar="NAME", help="Zeroconf service name")
1964
parser.add_argument("--configdir",
1965
default="/etc/mandos", metavar="DIR",
1966
help="Directory to search for configuration"
1967
" files")
1968
parser.add_argument("--no-dbus", action="store_false",
1969
dest="use_dbus", help="Do not provide D-Bus"
1970
" system bus interface")
1971
parser.add_argument("--no-ipv6", action="store_false",
1972
dest="use_ipv6", help="Do not use IPv6")
1973
parser.add_argument("--no-restore", action="store_false",
1974
dest="restore", help="Do not restore stored"
1975
" state")
1976
parser.add_argument("--statedir", metavar="DIR",
1977
help="Directory to save/restore state in")
1978
1979
options = parser.parse_args()
682
1980
683
1981
if options.check:
684
1982
import doctest
693
1991
"priority":
694
1992
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
695
1993
"servicename": "Mandos",
1994
"use_dbus": "True",
1995
"use_ipv6": "True",
1996
"debuglevel": "",
1997
"restore": "True",
1998
"statedir": "/var/lib/mandos"
696
1999
}
697
2000
698
2001
# Parse config file for server-global settings
699
server_config = ConfigParser.SafeConfigParser(server_defaults)
2002
server_config = configparser.SafeConfigParser(server_defaults)
700
2003
del server_defaults
701
server_config.read(os.path.join(options.configdir, "mandos.conf"))
702
server_section = "server"
2004
server_config.read(os.path.join(options.configdir,
2005
"mandos.conf"))
703
2006
# Convert the SafeConfigParser object to a dict
704
server_settings = dict(server_config.items(server_section))
705
# Use getboolean on the boolean config option
706
server_settings["debug"] = server_config.getboolean\
707
(server_section, "debug")
2007
server_settings = server_config.defaults()
2008
# Use the appropriate methods on the non-string config options
2009
for option in ("debug", "use_dbus", "use_ipv6"):
2010
server_settings[option] = server_config.getboolean("DEFAULT",
2011
option)
2012
if server_settings["port"]:
2013
server_settings["port"] = server_config.getint("DEFAULT",
2014
"port")
708
2015
del server_config
709
2016
710
2017
# Override the settings from the config file with command line
711
2018
# options, if set.
712
2019
for option in ("interface", "address", "port", "debug",
713
"priority", "servicename", "configdir"):
2020
"priority", "servicename", "configdir",
2021
"use_dbus", "use_ipv6", "debuglevel", "restore",
2022
"statedir"):
714
2023
value = getattr(options, option)
715
2024
if value is not None:
716
2025
server_settings[option] = value
717
2026
del options
2027
# Force all strings to be unicode
2028
for option in server_settings.keys():
2029
if type(server_settings[option]) is str:
2030
server_settings[option] = unicode(server_settings[option])
718
2031
# Now we have our good server settings in "server_settings"
719
2032
2033
##################################################################
2034
2035
# For convenience
720
2036
debug = server_settings["debug"]
2037
debuglevel = server_settings["debuglevel"]
2038
use_dbus = server_settings["use_dbus"]
2039
use_ipv6 = server_settings["use_ipv6"]
2040
stored_state_path = os.path.join(server_settings["statedir"],
2041
stored_state_file)
721
2042
722
if not debug:
723
syslogger.setLevel(logging.WARNING)
724
console.setLevel(logging.WARNING)
2043
if debug:
2044
initlogger(logging.DEBUG)
2045
else:
2046
if not debuglevel:
2047
initlogger()
2048
else:
2049
level = getattr(logging, debuglevel.upper())
2050
initlogger(level)
725
2051
726
2052
if server_settings["servicename"] != "Mandos":
727
syslogger.setFormatter(logging.Formatter\
728
('Mandos (%s): %%(levelname)s:'
729
' %%(message)s'
2053
syslogger.setFormatter(logging.Formatter
2054
('Mandos (%s) [%%(process)d]:'
2055
' %%(levelname)s: %%(message)s'
730
2056
% server_settings["servicename"]))
731
2057
732
2058
# Parse config file with clients
733
client_defaults = { "timeout": "1h",
734
"interval": "5m",
2059
client_defaults = { "timeout": "5m",
2060
"extended_timeout": "15m",
2061
"interval": "2m",
735
2062
"checker": "fping -q -- %%(host)s",
2063
"host": "",
2064
"approval_delay": "0s",
2065
"approval_duration": "1s",
736
2066
}
737
client_config = ConfigParser.SafeConfigParser(client_defaults)
2067
client_config = configparser.SafeConfigParser(client_defaults)
738
2068
client_config.read(os.path.join(server_settings["configdir"],
739
2069
"clients.conf"))
740
2070
741
global service
742
service = AvahiService(name = server_settings["servicename"],
743
type = "_mandos._tcp", );
744
if server_settings["interface"]:
745
service.interface = if_nametoindex(server_settings["interface"])
2071
global mandos_dbus_service
2072
mandos_dbus_service = None
2073
2074
tcp_server = MandosServer((server_settings["address"],
2075
server_settings["port"]),
2076
ClientHandler,
2077
interface=(server_settings["interface"]
2078
or None),
2079
use_ipv6=use_ipv6,
2080
gnutls_priority=
2081
server_settings["priority"],
2082
use_dbus=use_dbus)
2083
if not debug:
2084
pidfilename = "/var/run/mandos.pid"
2085
try:
2086
pidfile = open(pidfilename, "w")
2087
except IOError:
2088
logger.error("Could not open file %r", pidfilename)
2089
2090
try:
2091
uid = pwd.getpwnam("_mandos").pw_uid
2092
gid = pwd.getpwnam("_mandos").pw_gid
2093
except KeyError:
2094
try:
2095
uid = pwd.getpwnam("mandos").pw_uid
2096
gid = pwd.getpwnam("mandos").pw_gid
2097
except KeyError:
2098
try:
2099
uid = pwd.getpwnam("nobody").pw_uid
2100
gid = pwd.getpwnam("nobody").pw_gid
2101
except KeyError:
2102
uid = 65534
2103
gid = 65534
2104
try:
2105
os.setgid(gid)
2106
os.setuid(uid)
2107
except OSError as error:
2108
if error[0] != errno.EPERM:
2109
raise error
2110
2111
if debug:
2112
# Enable all possible GnuTLS debugging
2113
2114
# "Use a log level over 10 to enable all debugging options."
2115
# - GnuTLS manual
2116
gnutls.library.functions.gnutls_global_set_log_level(11)
2117
2118
@gnutls.library.types.gnutls_log_func
2119
def debug_gnutls(level, string):
2120
logger.debug("GnuTLS: %s", string[:-1])
2121
2122
(gnutls.library.functions
2123
.gnutls_global_set_log_function(debug_gnutls))
2124
2125
# Redirect stdin so all checkers get /dev/null
2126
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2127
os.dup2(null, sys.stdin.fileno())
2128
if null > 2:
2129
os.close(null)
2130
else:
2131
# No console logging
2132
logger.removeHandler(console)
2133
2134
# Need to fork before connecting to D-Bus
2135
if not debug:
2136
# Close all input and output, do double fork, etc.
2137
daemon()
746
2138
747
2139
global main_loop
748
global bus
749
global server
750
2140
# From the Avahi example code
751
2141
DBusGMainLoop(set_as_default=True )
752
2142
main_loop = gobject.MainLoop()
753
2143
bus = dbus.SystemBus()
754
server = dbus.Interface(
755
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
avahi.DBUS_INTERFACE_SERVER )
757
2144
# End of Avahi example code
758
759
clients = Set()
760
def remove_from_clients(client):
761
clients.remove(client)
762
if not clients:
763
logger.critical(u"No clients left, exiting")
764
sys.exit()
765
766
clients.update(Set(Client(name = section,
767
stop_hook = remove_from_clients,
768
config
769
= dict(client_config.items(section)))
770
for section in client_config.sections()))
771
if not clients:
772
logger.critical(u"No clients defined")
773
sys.exit(1)
774
2145
if use_dbus:
2146
try:
2147
bus_name = dbus.service.BusName("se.recompile.Mandos",
2148
bus, do_not_queue=True)
2149
old_bus_name = (dbus.service.BusName
2150
("se.bsnet.fukt.Mandos", bus,
2151
do_not_queue=True))
2152
except dbus.exceptions.NameExistsException as e:
2153
logger.error(unicode(e) + ", disabling D-Bus")
2154
use_dbus = False
2155
server_settings["use_dbus"] = False
2156
tcp_server.use_dbus = False
2157
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2158
service = AvahiServiceToSyslog(name =
2159
server_settings["servicename"],
2160
servicetype = "_mandos._tcp",
2161
protocol = protocol, bus = bus)
2162
if server_settings["interface"]:
2163
service.interface = (if_nametoindex
2164
(str(server_settings["interface"])))
2165
2166
global multiprocessing_manager
2167
multiprocessing_manager = multiprocessing.Manager()
2168
2169
client_class = Client
2170
if use_dbus:
2171
client_class = functools.partial(ClientDBusTransitional,
2172
bus = bus)
2173
2174
special_settings = {
2175
# Some settings need to be accessd by special methods;
2176
# booleans need .getboolean(), etc. Here is a list of them:
2177
"approved_by_default":
2178
lambda section:
2179
client_config.getboolean(section, "approved_by_default"),
2180
}
2181
# Construct a new dict of client settings of this form:
2182
# { client_name: {setting_name: value, ...}, ...}
2183
# with exceptions for any special settings as defined above
2184
client_settings = dict((clientname,
2185
dict((setting,
2186
(value
2187
if setting not in special_settings
2188
else special_settings[setting]
2189
(clientname)))
2190
for setting, value in
2191
client_config.items(clientname)))
2192
for clientname in client_config.sections())
2193
2194
old_client_settings = {}
2195
clients_data = []
2196
2197
# Get client data and settings from last running state.
2198
if server_settings["restore"]:
2199
try:
2200
with open(stored_state_path, "rb") as stored_state:
2201
clients_data, old_client_settings = (pickle.load
2202
(stored_state))
2203
os.remove(stored_state_path)
2204
except IOError as e:
2205
logger.warning("Could not load persistent state: {0}"
2206
.format(e))
2207
if e.errno != errno.ENOENT:
2208
raise
2209
2210
with Crypto() as crypt:
2211
for client in clients_data:
2212
client_name = client["name"]
2213
2214
# Decide which value to use after restoring saved state.
2215
# We have three different values: Old config file,
2216
# new config file, and saved state.
2217
# New config value takes precedence if it differs from old
2218
# config value, otherwise use saved state.
2219
for name, value in client_settings[client_name].items():
2220
try:
2221
# For each value in new config, check if it
2222
# differs from the old config value (Except for
2223
# the "secret" attribute)
2224
if (name != "secret" and
2225
value != old_client_settings[client_name]
2226
[name]):
2227
setattr(client, name, value)
2228
except KeyError:
2229
pass
2230
2231
# Clients who has passed its expire date can still be
2232
# enabled if its last checker was sucessful. Clients
2233
# whose checker failed before we stored its state is
2234
# assumed to have failed all checkers during downtime.
2235
if client["enabled"] and client["last_checked_ok"]:
2236
if ((datetime.datetime.utcnow()
2237
- client["last_checked_ok"])
2238
> client["interval"]):
2239
if client["last_checker_status"] != 0:
2240
client["enabled"] = False
2241
else:
2242
client["expires"] = (datetime.datetime
2243
.utcnow()
2244
+ client["timeout"])
2245
2246
client["changedstate"] = (multiprocessing_manager
2247
.Condition
2248
(multiprocessing_manager
2249
.Lock()))
2250
if use_dbus:
2251
new_client = (ClientDBusTransitional.__new__
2252
(ClientDBusTransitional))
2253
tcp_server.clients[client_name] = new_client
2254
new_client.bus = bus
2255
for name, value in client.iteritems():
2256
setattr(new_client, name, value)
2257
client_object_name = unicode(client_name).translate(
2258
{ord("."): ord("_"),
2259
ord("-"): ord("_")})
2260
new_client.dbus_object_path = (dbus.ObjectPath
2261
("/clients/"
2262
+ client_object_name))
2263
DBusObjectWithProperties.__init__(new_client,
2264
new_client.bus,
2265
new_client
2266
.dbus_object_path)
2267
else:
2268
tcp_server.clients[client_name] = (Client.__new__
2269
(Client))
2270
for name, value in client.iteritems():
2271
setattr(tcp_server.clients[client_name],
2272
name, value)
2273
2274
try:
2275
tcp_server.clients[client_name].secret = (
2276
crypt.decrypt(tcp_server.clients[client_name]
2277
.encrypted_secret,
2278
client_settings[client_name]
2279
["secret"]))
2280
except CryptoError:
2281
# If decryption fails, we use secret from new settings
2282
tcp_server.clients[client_name].secret = (
2283
client_settings[client_name]["secret"])
2284
2285
# Create/remove clients based on new changes made to config
2286
for clientname in set(old_client_settings) - set(client_settings):
2287
del tcp_server.clients[clientname]
2288
for clientname in set(client_settings) - set(old_client_settings):
2289
tcp_server.clients[clientname] = (client_class(name
2290
= clientname,
2291
config =
2292
client_settings
2293
[clientname]))
2294
2295
if not tcp_server.clients:
2296
logger.warning("No clients defined")
2297
775
2298
if not debug:
776
logger.removeHandler(console)
777
daemon()
778
779
pidfilename = "/var/run/mandos/mandos.pid"
780
pid = os.getpid()
781
try:
782
pidfile = open(pidfilename, "w")
783
pidfile.write(str(pid) + "\n")
784
pidfile.close()
785
del pidfile
786
except IOError, err:
787
logger.error(u"Could not write %s file with PID %d",
788
pidfilename, os.getpid())
2299
try:
2300
with pidfile:
2301
pid = os.getpid()
2302
pidfile.write(str(pid) + "\n".encode("utf-8"))
2303
del pidfile
2304
except IOError:
2305
logger.error("Could not write to file %r with PID %d",
2306
pidfilename, pid)
2307
except NameError:
2308
# "pidfile" was never created
2309
pass
2310
del pidfilename
2311
2312
signal.signal(signal.SIGINT, signal.SIG_IGN)
2313
2314
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2315
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2316
2317
if use_dbus:
2318
class MandosDBusService(dbus.service.Object):
2319
"""A D-Bus proxy object"""
2320
def __init__(self):
2321
dbus.service.Object.__init__(self, bus, "/")
2322
_interface = "se.recompile.Mandos"
2323
2324
@dbus.service.signal(_interface, signature="o")
2325
def ClientAdded(self, objpath):
2326
"D-Bus signal"
2327
pass
2328
2329
@dbus.service.signal(_interface, signature="ss")
2330
def ClientNotFound(self, fingerprint, address):
2331
"D-Bus signal"
2332
pass
2333
2334
@dbus.service.signal(_interface, signature="os")
2335
def ClientRemoved(self, objpath, name):
2336
"D-Bus signal"
2337
pass
2338
2339
@dbus.service.method(_interface, out_signature="ao")
2340
def GetAllClients(self):
2341
"D-Bus method"
2342
return dbus.Array(c.dbus_object_path
2343
for c in
2344
tcp_server.clients.itervalues())
2345
2346
@dbus.service.method(_interface,
2347
out_signature="a{oa{sv}}")
2348
def GetAllClientsWithProperties(self):
2349
"D-Bus method"
2350
return dbus.Dictionary(
2351
((c.dbus_object_path, c.GetAll(""))
2352
for c in tcp_server.clients.itervalues()),
2353
signature="oa{sv}")
2354
2355
@dbus.service.method(_interface, in_signature="o")
2356
def RemoveClient(self, object_path):
2357
"D-Bus method"
2358
for c in tcp_server.clients.itervalues():
2359
if c.dbus_object_path == object_path:
2360
del tcp_server.clients[c.name]
2361
c.remove_from_connection()
2362
# Don't signal anything except ClientRemoved
2363
c.disable(quiet=True)
2364
# Emit D-Bus signal
2365
self.ClientRemoved(object_path, c.name)
2366
return
2367
raise KeyError(object_path)
2368
2369
del _interface
2370
2371
class MandosDBusServiceTransitional(MandosDBusService):
2372
__metaclass__ = AlternateDBusNamesMetaclass
2373
mandos_dbus_service = MandosDBusServiceTransitional()
789
2374
790
2375
def cleanup():
791
2376
"Cleanup function; run on exit"
792
global group
793
# From the Avahi example code
794
if not group is None:
795
group.Free()
796
group = None
797
# End of Avahi example code
798
799
while clients:
800
client = clients.pop()
801
client.stop_hook = None
802
client.stop()
2377
service.cleanup()
2378
2379
multiprocessing.active_children()
2380
if not (tcp_server.clients or client_settings):
2381
return
2382
2383
# Store client before exiting. Secrets are encrypted with key
2384
# based on what config file has. If config file is
2385
# removed/edited, old secret will thus be unrecovable.
2386
clients = []
2387
with Crypto() as crypt:
2388
for client in tcp_server.clients.itervalues():
2389
key = client_settings[client.name]["secret"]
2390
client.encrypted_secret = crypt.encrypt(client.secret,
2391
key)
2392
client_dict = {}
2393
2394
# A list of attributes that will not be stored when
2395
# shutting down.
2396
exclude = set(("bus", "changedstate", "secret"))
2397
for name, typ in (inspect.getmembers
2398
(dbus.service.Object)):
2399
exclude.add(name)
2400
2401
client_dict["encrypted_secret"] = (client
2402
.encrypted_secret)
2403
for attr in client.client_structure:
2404
if attr not in exclude:
2405
client_dict[attr] = getattr(client, attr)
2406
2407
clients.append(client_dict)
2408
del client_settings[client.name]["secret"]
2409
2410
try:
2411
with os.fdopen(os.open(stored_state_path,
2412
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2413
0600), "wb") as stored_state:
2414
pickle.dump((clients, client_settings), stored_state)
2415
except (IOError, OSError) as e:
2416
logger.warning("Could not save persistent state: {0}"
2417
.format(e))
2418
if e.errno not in (errno.ENOENT, errno.EACCES):
2419
raise
2420
2421
# Delete all clients, and settings from config
2422
while tcp_server.clients:
2423
name, client = tcp_server.clients.popitem()
2424
if use_dbus:
2425
client.remove_from_connection()
2426
# Don't signal anything except ClientRemoved
2427
client.disable(quiet=True)
2428
if use_dbus:
2429
# Emit D-Bus signal
2430
mandos_dbus_service.ClientRemoved(client
2431
.dbus_object_path,
2432
client.name)
2433
client_settings.clear()
803
2434
804
2435
atexit.register(cleanup)
805
2436
806
if not debug:
807
signal.signal(signal.SIGINT, signal.SIG_IGN)
808
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
809
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
810
811
for client in clients:
812
client.start()
813
814
tcp_server = IPv6_TCPServer((server_settings["address"],
815
server_settings["port"]),
816
tcp_handler,
817
settings=server_settings,
818
clients=clients)
2437
for client in tcp_server.clients.itervalues():
2438
if use_dbus:
2439
# Emit D-Bus signal
2440
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2441
# Need to initiate checking of clients
2442
if client.enabled:
2443
client.init_checker()
2444
2445
tcp_server.enable()
2446
tcp_server.server_activate()
2447
819
2448
# Find out what port we got
820
2449
service.port = tcp_server.socket.getsockname()[1]
821
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
822
u" scope_id %d" % tcp_server.socket.getsockname())
2450
if use_ipv6:
2451
logger.info("Now listening on address %r, port %d,"
2452
" flowinfo %d, scope_id %d"
2453
% tcp_server.socket.getsockname())
2454
else: # IPv4
2455
logger.info("Now listening on address %r, port %d"
2456
% tcp_server.socket.getsockname())
823
2457
824
2458
#service.interface = tcp_server.socket.getsockname()[3]
825
2459
826
2460
try:
827
2461
# From the Avahi example code
828
server.connect_to_signal("StateChanged", server_state_changed)
829
2462
try:
830
server_state_changed(server.GetState())
831
except dbus.exceptions.DBusException, error:
832
logger.critical(u"DBusException: %s", error)
2463
service.activate()
2464
except dbus.exceptions.DBusException as error:
2465
logger.critical("DBusException: %s", error)
2466
cleanup()
833
2467
sys.exit(1)
834
2468
# End of Avahi example code
835
2469
836
2470
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
837
2471
lambda *args, **kwargs:
838
tcp_server.handle_request\
839
(*args[2:], **kwargs) or True)
2472
(tcp_server.handle_request
2473
(*args[2:], **kwargs) or True))
840
2474
841
logger.debug(u"Starting main loop")
842
main_loop_started = True
2475
logger.debug("Starting main loop")
843
2476
main_loop.run()
844
except AvahiError, error:
845
logger.critical(u"AvahiError: %s" + unicode(error))
2477
except AvahiError as error:
2478
logger.critical("AvahiError: %s", error)
2479
cleanup()
846
2480
sys.exit(1)
847
2481
except KeyboardInterrupt:
848
2482
if debug:
849
print
2483
print("", file=sys.stderr)
2484
logger.debug("Server received KeyboardInterrupt")
2485
logger.debug("Server exiting")
2486
# Must run before the D-Bus bus name gets deregistered
2487
cleanup()
2488
850
2489
851
2490
if __name__ == '__main__':
852
2491
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0