To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 237.7.88
- compare with another revision
- download diff
- download tarball
- view history from revision 237.7.88
- Committer: Teddy Hogeborn
- Date: 2011-12-28 07:25:59 UTC
- mto: (237.7.109 trunk) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@recompile.se-20111228072559-u9no7ozprpr28j6k
* mandos (PGPEngine.__init__): Add "--no-use-agent" to gpg options.
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files removed:
- plugins.d/usplash
- files renamed:
- 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
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(debug, level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
if debug:
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 PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
78
211
79
212
class AvahiError(Exception):
80
def __init__(self, value):
213
def __init__(self, value, *args, **kwargs):
81
214
self.value = value
82
def __str__(self):
83
return repr(self.value)
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
84
218
85
219
class AvahiServiceError(AvahiError):
86
220
pass
91
225
92
226
class AvahiService(object):
93
227
"""An Avahi (Zeroconf) service.
228
94
229
Attributes:
95
230
interface: integer; avahi.IF_UNSPEC or an interface index.
96
231
Used to optionally bind to the specified interface.
104
239
max_renames: integer; maximum number of renames
105
240
rename_count: integer; counter so we only rename after collisions
106
241
a sensible number of times
242
group: D-Bus Entry Group
243
server: D-Bus Server
244
bus: dbus.SystemBus()
107
245
"""
108
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
111
250
self.interface = interface
112
251
self.name = name
113
self.type = type
252
self.type = servicetype
114
253
self.port = port
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
254
self.TXT = TXT if TXT is not None else []
119
255
self.domain = domain
120
256
self.host = host
121
257
self.rename_count = 0
122
258
self.max_renames = max_renames
259
self.protocol = protocol
260
self.group = None # our entry group
261
self.server = None
262
self.bus = bus
263
self.entry_group_state_changed_match = None
123
264
def rename(self):
124
265
"""Derived from the Avahi example code"""
125
266
if self.rename_count >= self.max_renames:
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
269
self.rename_count)
128
270
raise AvahiServiceError("Too many renames")
129
self.name = server.GetAlternativeServiceName(self.name)
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
274
self.name)
134
275
self.remove()
135
self.add()
276
try:
277
self.add()
278
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
136
282
self.rename_count += 1
137
283
def remove(self):
138
284
"""Derived from the Avahi example code"""
139
if group is not None:
140
group.Reset()
285
if self.entry_group_state_changed_match is not None:
286
self.entry_group_state_changed_match.remove()
287
self.entry_group_state_changed_match = None
288
if self.group is not None:
289
self.group.Reset()
141
290
def add(self):
142
291
"""Derived from the Avahi example code"""
143
global group
144
if group is None:
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
147
server.EntryGroupNew()),
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
group.connect_to_signal('StateChanged',
150
entry_group_state_changed)
151
logger.debug(u"Adding service '%s' of type '%s' ...",
152
service.name, service.type)
153
group.AddService(
154
self.interface, # interface
155
avahi.PROTO_INET6, # protocol
156
dbus.UInt32(0), # flags
157
self.name, self.type,
158
self.domain, self.host,
159
dbus.UInt16(self.port),
160
avahi.string_array_to_txt_array(self.TXT))
161
group.Commit()
162
163
# From the Avahi example code:
164
group = None # our entry group
165
# End of Avahi example code
166
167
292
self.remove()
293
if self.group is None:
294
self.group = dbus.Interface(
295
self.bus.get_object(avahi.DBUS_NAME,
296
self.server.EntryGroupNew()),
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
298
self.entry_group_state_changed_match = (
299
self.group.connect_to_signal(
300
'StateChanged', self.entry_group_state_changed))
301
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
302
self.name, self.type)
303
self.group.AddService(
304
self.interface,
305
self.protocol,
306
dbus.UInt32(0), # flags
307
self.name, self.type,
308
self.domain, self.host,
309
dbus.UInt16(self.port),
310
avahi.string_array_to_txt_array(self.TXT))
311
self.group.Commit()
312
def entry_group_state_changed(self, state, error):
313
"""Derived from the Avahi example code"""
314
logger.debug("Avahi entry group state change: %i", state)
315
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
logger.debug("Zeroconf service established.")
318
elif state == avahi.ENTRY_GROUP_COLLISION:
319
logger.info("Zeroconf service name collision.")
320
self.rename()
321
elif state == avahi.ENTRY_GROUP_FAILURE:
322
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
326
def cleanup(self):
327
"""Derived from the Avahi example code"""
328
if self.group is not None:
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
334
self.group = None
335
self.remove()
336
def server_state_changed(self, state, error=None):
337
"""Derived from the Avahi example code"""
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
348
if error is None:
349
logger.error(bad_states[state])
350
else:
351
logger.error(bad_states[state] + ": %r", error)
352
self.cleanup()
353
elif state == avahi.SERVER_RUNNING:
354
self.add()
355
else:
356
if error is None:
357
logger.debug("Unknown state: %r", state)
358
else:
359
logger.debug("Unknown state: %r: %r", state, error)
360
def activate(self):
361
"""Derived from the Avahi example code"""
362
if self.server is None:
363
self.server = dbus.Interface(
364
self.bus.get_object(avahi.DBUS_NAME,
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
367
avahi.DBUS_INTERFACE_SERVER)
368
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
370
self.server_state_changed(self.server.GetState())
371
372
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
380
return ret
381
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
168
388
class Client(object):
169
389
"""A representation of a client host served by this server.
390
170
391
Attributes:
171
name: string; from the config file, used in log messages
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
approval_duration: datetime.timedelta(); Duration of one approval
395
checker: subprocess.Popen(); a running checker process used
396
to see if the client lives.
397
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
if client lives. %() expansions are done at
401
runtime with vars(self) as dict, so that for
402
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
407
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
172
410
fingerprint: string (40 or 32 hexadecimal digits); used to
173
411
uniquely identify the client
174
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
176
created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
until this client is invalid
180
interval: datetime.timedelta(); How often to start a new checker
181
stop_hook: If set, called by stop() as stop_hook(self)
182
checker: subprocess.Popen(); a running checker process used
183
to see if the client lives.
184
'None' if no process is running.
185
checker_initiator_tag: a gobject event source tag, or None
186
stop_initiator_tag: - '' -
187
checker_callback_tag: - '' -
188
checker_command: string; External command which is run to check if
189
client lives. %() expansions are done at
190
runtime with vars(self) as dict, so that for
191
instance %(name)s can be used in the command.
192
Private attibutes:
193
_timeout: Real variable for 'timeout'
194
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
196
_interval_milliseconds: - '' -
412
host: string; available for use by the checker command
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, or None.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
197
429
"""
198
def _set_timeout(self, timeout):
199
"Setter function for 'timeout' attribute"
200
self._timeout = timeout
201
self._timeout_milliseconds = ((self.timeout.days
202
* 24 * 60 * 60 * 1000)
203
+ (self.timeout.seconds * 1000)
204
+ (self.timeout.microseconds
205
// 1000))
206
timeout = property(lambda self: self._timeout,
207
_set_timeout)
208
del _set_timeout
209
def _set_interval(self, interval):
210
"Setter function for 'interval' attribute"
211
self._interval = interval
212
self._interval_milliseconds = ((self.interval.days
213
* 24 * 60 * 60 * 1000)
214
+ (self.interval.seconds
215
* 1000)
216
+ (self.interval.microseconds
217
// 1000))
218
interval = property(lambda self: self._interval,
219
_set_interval)
220
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
430
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
""" Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above"""
466
settings = {}
467
for client_name in config.sections():
468
section = dict(config.items(client_name))
469
client = settings[client_name] = {}
470
471
client["host"] = section["host"]
472
# Reformat values from string types to Python types
473
client["approved_by_default"] = config.getboolean(
474
client_name, "approved_by_default")
475
client["enabled"] = config.getboolean(client_name, "enabled")
476
477
client["fingerprint"] = (section["fingerprint"].upper()
478
.replace(" ", ""))
479
if "secret" in section:
480
client["secret"] = section["secret"].decode("base64")
481
elif "secfile" in section:
482
with open(os.path.expanduser(os.path.expandvars
483
(section["secfile"])),
484
"rb") as secfile:
485
client["secret"] = secfile.read()
486
else:
487
raise TypeError("No secret or secfile for section %s"
488
% section)
489
client["timeout"] = string_to_delta(section["timeout"])
490
client["extended_timeout"] = string_to_delta(
491
section["extended_timeout"])
492
client["interval"] = string_to_delta(section["interval"])
493
client["approval_delay"] = string_to_delta(
494
section["approval_delay"])
495
client["approval_duration"] = string_to_delta(
496
section["approval_duration"])
497
client["checker_command"] = section["checker"]
498
client["last_approval_request"] = None
499
client["last_checked_ok"] = None
500
client["last_checker_status"] = None
501
if client["enabled"]:
502
client["last_enabled"] = datetime.datetime.utcnow()
503
client["expires"] = (datetime.datetime.utcnow()
504
+ client["timeout"])
505
else:
506
client["last_enabled"] = None
507
client["expires"] = None
508
509
return settings
510
511
512
def __init__(self, settings, name = None):
222
513
"""Note: the 'checker' key in 'config' sets the
223
514
'checker_command' attribute and *not* the 'checker'
224
515
attribute."""
225
516
self.name = name
226
logger.debug(u"Creating client %r", self.name)
517
# adding all client settings
518
for setting, value in settings.iteritems():
519
setattr(self, setting, value)
520
521
logger.debug("Creating client %r", self.name)
227
522
# Uppercase and remove spaces from fingerprint for later
228
523
# comparison purposes with return value from the fingerprint()
229
524
# function
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
232
logger.debug(u" Fingerprint: %s", self.fingerprint)
233
if "secret" in config:
234
self.secret = config["secret"].decode(u"base64")
235
elif "secfile" in config:
236
sf = open(config["secfile"])
237
self.secret = sf.read()
238
sf.close()
239
else:
240
raise TypeError(u"No secret or secfile for client %s"
241
% self.name)
242
self.host = config.get("host", "")
243
self.created = datetime.datetime.now()
244
self.last_checked_ok = None
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
247
self.stop_hook = stop_hook
525
logger.debug(" Fingerprint: %s", self.fingerprint)
526
self.created = settings.get("created", datetime.datetime.utcnow())
527
528
# attributes specific for this server instance
248
529
self.checker = None
249
530
self.checker_initiator_tag = None
250
self.stop_initiator_tag = None
531
self.disable_initiator_tag = None
251
532
self.checker_callback_tag = None
252
self.check_command = config["checker"]
253
def start(self):
533
self.current_checker_command = None
534
self.approved = None
535
self.approvals_pending = 0
536
self.changedstate = (multiprocessing_manager
537
.Condition(multiprocessing_manager
538
.Lock()))
539
self.client_structure = [attr for attr in
540
self.__dict__.iterkeys()
541
if not attr.startswith("_")]
542
self.client_structure.append("client_structure")
543
544
for name, t in inspect.getmembers(type(self),
545
lambda obj:
546
isinstance(obj,
547
property)):
548
if not name.startswith("_"):
549
self.client_structure.append(name)
550
551
# Send notice to process children that client state has changed
552
def send_changedstate(self):
553
with self.changedstate:
554
self.changedstate.notify_all()
555
556
def enable(self):
254
557
"""Start this client's checker and timeout hooks"""
558
if getattr(self, "enabled", False):
559
# Already enabled
560
return
561
self.send_changedstate()
562
self.expires = datetime.datetime.utcnow() + self.timeout
563
self.enabled = True
564
self.last_enabled = datetime.datetime.utcnow()
565
self.init_checker()
566
567
def disable(self, quiet=True):
568
"""Disable this client."""
569
if not getattr(self, "enabled", False):
570
return False
571
if not quiet:
572
self.send_changedstate()
573
if not quiet:
574
logger.info("Disabling client %s", self.name)
575
if getattr(self, "disable_initiator_tag", False):
576
gobject.source_remove(self.disable_initiator_tag)
577
self.disable_initiator_tag = None
578
self.expires = None
579
if getattr(self, "checker_initiator_tag", False):
580
gobject.source_remove(self.checker_initiator_tag)
581
self.checker_initiator_tag = None
582
self.stop_checker()
583
self.enabled = False
584
# Do not run this again if called by a gobject.timeout_add
585
return False
586
587
def __del__(self):
588
self.disable()
589
590
def init_checker(self):
255
591
# Schedule a new checker to be started an 'interval' from now,
256
592
# and every interval from then on.
257
self.checker_initiator_tag = gobject.timeout_add\
258
(self._interval_milliseconds,
259
self.start_checker)
593
self.checker_initiator_tag = (gobject.timeout_add
594
(self.interval_milliseconds(),
595
self.start_checker))
596
# Schedule a disable() when 'timeout' has passed
597
self.disable_initiator_tag = (gobject.timeout_add
598
(self.timeout_milliseconds(),
599
self.disable))
260
600
# Also start a new checker *right now*.
261
601
self.start_checker()
262
# Schedule a stop() when 'timeout' has passed
263
self.stop_initiator_tag = gobject.timeout_add\
264
(self._timeout_milliseconds,
265
self.stop)
266
def stop(self):
267
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
270
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
273
self.secret = None
274
else:
275
return False
276
if getattr(self, "stop_initiator_tag", False):
277
gobject.source_remove(self.stop_initiator_tag)
278
self.stop_initiator_tag = None
279
if getattr(self, "checker_initiator_tag", False):
280
gobject.source_remove(self.checker_initiator_tag)
281
self.checker_initiator_tag = None
282
self.stop_checker()
283
if self.stop_hook:
284
self.stop_hook(self)
285
# Do not run this again if called by a gobject.timeout_add
286
return False
287
def __del__(self):
288
self.stop_hook = None
289
self.stop()
290
def checker_callback(self, pid, condition):
602
603
def checker_callback(self, pid, condition, command):
291
604
"""The checker has completed, so take appropriate actions."""
292
now = datetime.datetime.now()
293
605
self.checker_callback_tag = None
294
606
self.checker = None
295
if os.WIFEXITED(condition) \
296
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
300
gobject.source_remove(self.stop_initiator_tag)
301
self.stop_initiator_tag = gobject.timeout_add\
302
(self._timeout_milliseconds,
303
self.stop)
304
elif not os.WIFEXITED(condition):
305
logger.warning(u"Checker for %(name)s crashed?",
607
if os.WIFEXITED(condition):
608
self.last_checker_status = os.WEXITSTATUS(condition)
609
if self.last_checker_status == 0:
610
logger.info("Checker for %(name)s succeeded",
611
vars(self))
612
self.checked_ok()
613
else:
614
logger.info("Checker for %(name)s failed",
615
vars(self))
616
else:
617
self.last_checker_status = -1
618
logger.warning("Checker for %(name)s crashed?",
306
619
vars(self))
307
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
620
621
def checked_ok(self, timeout=None):
622
"""Bump up the timeout for this client.
623
624
This should only be called when the client has been seen,
625
alive and well.
626
"""
627
if timeout is None:
628
timeout = self.timeout
629
self.last_checked_ok = datetime.datetime.utcnow()
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
632
if getattr(self, "enabled", False):
633
self.disable_initiator_tag = (gobject.timeout_add
634
(timedelta_to_milliseconds
635
(timeout), self.disable))
636
self.expires = datetime.datetime.utcnow() + timeout
637
638
def need_approval(self):
639
self.last_approval_request = datetime.datetime.utcnow()
640
310
641
def start_checker(self):
311
642
"""Start a new checker subprocess if one is not running.
643
312
644
If a checker already exists, leave it running and do
313
645
nothing."""
314
646
# The reason for not killing a running checker is that if we
317
649
# client would inevitably timeout, since no checker would get
318
650
# a chance to run to completion. If we instead leave running
319
651
# checkers alone, the checker would have to take more time
320
# than 'timeout' for the client to be declared invalid, which
321
# is as it should be.
652
# than 'timeout' for the client to be disabled, which is as it
653
# should be.
654
655
# If a checker exists, make sure it is not a zombie
656
try:
657
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
658
except (AttributeError, OSError) as error:
659
if (isinstance(error, OSError)
660
and error.errno != errno.ECHILD):
661
raise error
662
else:
663
if pid:
664
logger.warning("Checker was a zombie")
665
gobject.source_remove(self.checker_callback_tag)
666
self.checker_callback(pid, status,
667
self.current_checker_command)
668
# Start a new checker if needed
322
669
if self.checker is None:
323
670
try:
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
671
# In case checker_command has exactly one % operator
672
command = self.checker_command % self.host
326
673
except TypeError:
327
674
# Escape attributes for the shell
328
escaped_attrs = dict((key, re.escape(str(val)))
329
for key, val in
330
vars(self).iteritems())
675
escaped_attrs = dict(
676
(attr,
677
re.escape(unicode(str(getattr(self, attr, "")),
678
errors=
679
'replace')))
680
for attr in
681
self.runtime_expansions)
682
331
683
try:
332
command = self.check_command % escaped_attrs
333
except TypeError, error:
334
logger.error(u'Could not format string "%s":'
335
u' %s', self.check_command, error)
684
command = self.checker_command % escaped_attrs
685
except TypeError as error:
686
logger.error('Could not format string "%s":'
687
' %s', self.checker_command, error)
336
688
return True # Try again later
689
self.current_checker_command = command
337
690
try:
338
logger.info(u"Starting checker %r for %s",
691
logger.info("Starting checker %r for %s",
339
692
command, self.name)
340
693
# We don't need to redirect stdout and stderr, since
341
694
# in normal mode, that is already done by daemon(),
344
697
self.checker = subprocess.Popen(command,
345
698
close_fds=True,
346
699
shell=True, cwd="/")
347
self.checker_callback_tag = gobject.child_watch_add\
348
(self.checker.pid,
349
self.checker_callback)
350
except OSError, error:
351
logger.error(u"Failed to start subprocess: %s",
700
self.checker_callback_tag = (gobject.child_watch_add
701
(self.checker.pid,
702
self.checker_callback,
703
data=command))
704
# The checker may have completed before the gobject
705
# watch was added. Check for this.
706
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
707
if pid:
708
gobject.source_remove(self.checker_callback_tag)
709
self.checker_callback(pid, status, command)
710
except OSError as error:
711
logger.error("Failed to start subprocess: %s",
352
712
error)
353
713
# Re-run this periodically if run by gobject.timeout_add
354
714
return True
715
355
716
def stop_checker(self):
356
717
"""Force the checker process, if any, to stop."""
357
718
if self.checker_callback_tag:
359
720
self.checker_callback_tag = None
360
721
if getattr(self, "checker", None) is None:
361
722
return
362
logger.debug(u"Stopping checker for %(name)s", vars(self))
723
logger.debug("Stopping checker for %(name)s", vars(self))
363
724
try:
364
725
os.kill(self.checker.pid, signal.SIGTERM)
365
#os.sleep(0.5)
726
#time.sleep(0.5)
366
727
#if self.checker.poll() is None:
367
728
# os.kill(self.checker.pid, signal.SIGKILL)
368
except OSError, error:
729
except OSError as error:
369
730
if error.errno != errno.ESRCH: # No such process
370
731
raise
371
732
self.checker = None
372
def still_valid(self):
373
"""Has the timeout not yet passed for this client?"""
374
now = datetime.datetime.now()
375
if self.last_checked_ok is None:
376
return now < (self.created + self.timeout)
377
else:
378
return now < (self.last_checked_ok + self.timeout)
379
380
381
def peer_certificate(session):
382
"Return the peer's OpenPGP certificate as a bytestring"
383
# If not an OpenPGP certificate...
384
if gnutls.library.functions.gnutls_certificate_type_get\
385
(session._c_object) \
386
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
387
# ...do the normal thing
388
return session.peer_certificate
389
list_size = ctypes.c_uint()
390
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
391
(session._c_object, ctypes.byref(list_size))
392
if list_size.value == 0:
393
return None
394
cert = cert_list[0]
395
return ctypes.string_at(cert.data, cert.size)
396
397
398
def fingerprint(openpgp):
399
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
400
# New GnuTLS "datum" with the OpenPGP public key
401
datum = gnutls.library.types.gnutls_datum_t\
402
(ctypes.cast(ctypes.c_char_p(openpgp),
403
ctypes.POINTER(ctypes.c_ubyte)),
404
ctypes.c_uint(len(openpgp)))
405
# New empty GnuTLS certificate
406
crt = gnutls.library.types.gnutls_openpgp_crt_t()
407
gnutls.library.functions.gnutls_openpgp_crt_init\
408
(ctypes.byref(crt))
409
# Import the OpenPGP public key into the certificate
410
gnutls.library.functions.gnutls_openpgp_crt_import\
411
(crt, ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# Verify the self signature in the key
414
crtverify = ctypes.c_uint();
415
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
416
(crt, ctypes.c_uint(0), ctypes.byref(crtverify))
417
if crtverify != 0:
418
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
419
raise gnutls.errors.CertificateSecurityError("Verify failed")
420
# New buffer for the fingerprint
421
buffer = ctypes.create_string_buffer(20)
422
buffer_length = ctypes.c_size_t()
423
# Get the fingerprint from the certificate into the buffer
424
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
425
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
426
# Deinit the certificate
427
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
428
# Convert the buffer to a Python bytestring
429
fpr = ctypes.string_at(buffer, buffer_length.value)
430
# Convert the bytestring to hexadecimal notation
431
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
432
return hex_fpr
433
434
435
class tcp_handler(SocketServer.BaseRequestHandler, object):
436
"""A TCP request handler class.
437
Instantiated by IPv6_TCPServer for each request to handle it.
733
734
735
def dbus_service_property(dbus_interface, signature="v",
736
access="readwrite", byte_arrays=False):
737
"""Decorators for marking methods of a DBusObjectWithProperties to
738
become properties on the D-Bus.
739
740
The decorated method will be called with no arguments by "Get"
741
and with one argument by "Set".
742
743
The parameters, where they are supported, are the same as
744
dbus.service.method, except there is only "signature", since the
745
type from Get() and the type sent to Set() is the same.
746
"""
747
# Encoding deeply encoded byte arrays is not supported yet by the
748
# "Set" method, so we fail early here:
749
if byte_arrays and signature != "ay":
750
raise ValueError("Byte arrays not supported for non-'ay'"
751
" signature %r" % signature)
752
def decorator(func):
753
func._dbus_is_property = True
754
func._dbus_interface = dbus_interface
755
func._dbus_signature = signature
756
func._dbus_access = access
757
func._dbus_name = func.__name__
758
if func._dbus_name.endswith("_dbus_property"):
759
func._dbus_name = func._dbus_name[:-14]
760
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
761
return func
762
return decorator
763
764
765
class DBusPropertyException(dbus.exceptions.DBusException):
766
"""A base class for D-Bus property-related exceptions
767
"""
768
def __unicode__(self):
769
return unicode(str(self))
770
771
772
class DBusPropertyAccessException(DBusPropertyException):
773
"""A property's access permissions disallows an operation.
774
"""
775
pass
776
777
778
class DBusPropertyNotFound(DBusPropertyException):
779
"""An attempt was made to access a non-existing property.
780
"""
781
pass
782
783
784
class DBusObjectWithProperties(dbus.service.Object):
785
"""A D-Bus object with properties.
786
787
Classes inheriting from this can use the dbus_service_property
788
decorator to expose methods as D-Bus properties. It exposes the
789
standard Get(), Set(), and GetAll() methods on the D-Bus.
790
"""
791
792
@staticmethod
793
def _is_dbus_property(obj):
794
return getattr(obj, "_dbus_is_property", False)
795
796
def _get_all_dbus_properties(self):
797
"""Returns a generator of (name, attribute) pairs
798
"""
799
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
800
for cls in self.__class__.__mro__
801
for name, prop in
802
inspect.getmembers(cls, self._is_dbus_property))
803
804
def _get_dbus_property(self, interface_name, property_name):
805
"""Returns a bound method if one exists which is a D-Bus
806
property with the specified name and interface.
807
"""
808
for cls in self.__class__.__mro__:
809
for name, value in (inspect.getmembers
810
(cls, self._is_dbus_property)):
811
if (value._dbus_name == property_name
812
and value._dbus_interface == interface_name):
813
return value.__get__(self)
814
815
# No such property
816
raise DBusPropertyNotFound(self.dbus_object_path + ":"
817
+ interface_name + "."
818
+ property_name)
819
820
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
821
out_signature="v")
822
def Get(self, interface_name, property_name):
823
"""Standard D-Bus property Get() method, see D-Bus standard.
824
"""
825
prop = self._get_dbus_property(interface_name, property_name)
826
if prop._dbus_access == "write":
827
raise DBusPropertyAccessException(property_name)
828
value = prop()
829
if not hasattr(value, "variant_level"):
830
return value
831
return type(value)(value, variant_level=value.variant_level+1)
832
833
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
834
def Set(self, interface_name, property_name, value):
835
"""Standard D-Bus property Set() method, see D-Bus standard.
836
"""
837
prop = self._get_dbus_property(interface_name, property_name)
838
if prop._dbus_access == "read":
839
raise DBusPropertyAccessException(property_name)
840
if prop._dbus_get_args_options["byte_arrays"]:
841
# The byte_arrays option is not supported yet on
842
# signatures other than "ay".
843
if prop._dbus_signature != "ay":
844
raise ValueError
845
value = dbus.ByteArray(''.join(unichr(byte)
846
for byte in value))
847
prop(value)
848
849
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
850
out_signature="a{sv}")
851
def GetAll(self, interface_name):
852
"""Standard D-Bus property GetAll() method, see D-Bus
853
standard.
854
855
Note: Will not include properties with access="write".
856
"""
857
properties = {}
858
for name, prop in self._get_all_dbus_properties():
859
if (interface_name
860
and interface_name != prop._dbus_interface):
861
# Interface non-empty but did not match
862
continue
863
# Ignore write-only properties
864
if prop._dbus_access == "write":
865
continue
866
value = prop()
867
if not hasattr(value, "variant_level"):
868
properties[name] = value
869
continue
870
properties[name] = type(value)(value, variant_level=
871
value.variant_level+1)
872
return dbus.Dictionary(properties, signature="sv")
873
874
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
875
out_signature="s",
876
path_keyword='object_path',
877
connection_keyword='connection')
878
def Introspect(self, object_path, connection):
879
"""Standard D-Bus method, overloaded to insert property tags.
880
"""
881
xmlstring = dbus.service.Object.Introspect(self, object_path,
882
connection)
883
try:
884
document = xml.dom.minidom.parseString(xmlstring)
885
def make_tag(document, name, prop):
886
e = document.createElement("property")
887
e.setAttribute("name", name)
888
e.setAttribute("type", prop._dbus_signature)
889
e.setAttribute("access", prop._dbus_access)
890
return e
891
for if_tag in document.getElementsByTagName("interface"):
892
for tag in (make_tag(document, name, prop)
893
for name, prop
894
in self._get_all_dbus_properties()
895
if prop._dbus_interface
896
== if_tag.getAttribute("name")):
897
if_tag.appendChild(tag)
898
# Add the names to the return values for the
899
# "org.freedesktop.DBus.Properties" methods
900
if (if_tag.getAttribute("name")
901
== "org.freedesktop.DBus.Properties"):
902
for cn in if_tag.getElementsByTagName("method"):
903
if cn.getAttribute("name") == "Get":
904
for arg in cn.getElementsByTagName("arg"):
905
if (arg.getAttribute("direction")
906
== "out"):
907
arg.setAttribute("name", "value")
908
elif cn.getAttribute("name") == "GetAll":
909
for arg in cn.getElementsByTagName("arg"):
910
if (arg.getAttribute("direction")
911
== "out"):
912
arg.setAttribute("name", "props")
913
xmlstring = document.toxml("utf-8")
914
document.unlink()
915
except (AttributeError, xml.dom.DOMException,
916
xml.parsers.expat.ExpatError) as error:
917
logger.error("Failed to override Introspection method",
918
error)
919
return xmlstring
920
921
922
def datetime_to_dbus (dt, variant_level=0):
923
"""Convert a UTC datetime.datetime() to a D-Bus type."""
924
if dt is None:
925
return dbus.String("", variant_level = variant_level)
926
return dbus.String(dt.isoformat(),
927
variant_level=variant_level)
928
929
930
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
931
.__metaclass__):
932
"""Applied to an empty subclass of a D-Bus object, this metaclass
933
will add additional D-Bus attributes matching a certain pattern.
934
"""
935
def __new__(mcs, name, bases, attr):
936
# Go through all the base classes which could have D-Bus
937
# methods, signals, or properties in them
938
for base in (b for b in bases
939
if issubclass(b, dbus.service.Object)):
940
# Go though all attributes of the base class
941
for attrname, attribute in inspect.getmembers(base):
942
# Ignore non-D-Bus attributes, and D-Bus attributes
943
# with the wrong interface name
944
if (not hasattr(attribute, "_dbus_interface")
945
or not attribute._dbus_interface
946
.startswith("se.recompile.Mandos")):
947
continue
948
# Create an alternate D-Bus interface name based on
949
# the current name
950
alt_interface = (attribute._dbus_interface
951
.replace("se.recompile.Mandos",
952
"se.bsnet.fukt.Mandos"))
953
# Is this a D-Bus signal?
954
if getattr(attribute, "_dbus_is_signal", False):
955
# Extract the original non-method function by
956
# black magic
957
nonmethod_func = (dict(
958
zip(attribute.func_code.co_freevars,
959
attribute.__closure__))["func"]
960
.cell_contents)
961
# Create a new, but exactly alike, function
962
# object, and decorate it to be a new D-Bus signal
963
# with the alternate D-Bus interface name
964
new_function = (dbus.service.signal
965
(alt_interface,
966
attribute._dbus_signature)
967
(types.FunctionType(
968
nonmethod_func.func_code,
969
nonmethod_func.func_globals,
970
nonmethod_func.func_name,
971
nonmethod_func.func_defaults,
972
nonmethod_func.func_closure)))
973
# Define a creator of a function to call both the
974
# old and new functions, so both the old and new
975
# signals gets sent when the function is called
976
def fixscope(func1, func2):
977
"""This function is a scope container to pass
978
func1 and func2 to the "call_both" function
979
outside of its arguments"""
980
def call_both(*args, **kwargs):
981
"""This function will emit two D-Bus
982
signals by calling func1 and func2"""
983
func1(*args, **kwargs)
984
func2(*args, **kwargs)
985
return call_both
986
# Create the "call_both" function and add it to
987
# the class
988
attr[attrname] = fixscope(attribute,
989
new_function)
990
# Is this a D-Bus method?
991
elif getattr(attribute, "_dbus_is_method", False):
992
# Create a new, but exactly alike, function
993
# object. Decorate it to be a new D-Bus method
994
# with the alternate D-Bus interface name. Add it
995
# to the class.
996
attr[attrname] = (dbus.service.method
997
(alt_interface,
998
attribute._dbus_in_signature,
999
attribute._dbus_out_signature)
1000
(types.FunctionType
1001
(attribute.func_code,
1002
attribute.func_globals,
1003
attribute.func_name,
1004
attribute.func_defaults,
1005
attribute.func_closure)))
1006
# Is this a D-Bus property?
1007
elif getattr(attribute, "_dbus_is_property", False):
1008
# Create a new, but exactly alike, function
1009
# object, and decorate it to be a new D-Bus
1010
# property with the alternate D-Bus interface
1011
# name. Add it to the class.
1012
attr[attrname] = (dbus_service_property
1013
(alt_interface,
1014
attribute._dbus_signature,
1015
attribute._dbus_access,
1016
attribute
1017
._dbus_get_args_options
1018
["byte_arrays"])
1019
(types.FunctionType
1020
(attribute.func_code,
1021
attribute.func_globals,
1022
attribute.func_name,
1023
attribute.func_defaults,
1024
attribute.func_closure)))
1025
return type.__new__(mcs, name, bases, attr)
1026
1027
1028
class ClientDBus(Client, DBusObjectWithProperties):
1029
"""A Client class using D-Bus
1030
1031
Attributes:
1032
dbus_object_path: dbus.ObjectPath
1033
bus: dbus.SystemBus()
1034
"""
1035
1036
runtime_expansions = (Client.runtime_expansions
1037
+ ("dbus_object_path",))
1038
1039
# dbus.service.Object doesn't use super(), so we can't either.
1040
1041
def __init__(self, bus = None, *args, **kwargs):
1042
self.bus = bus
1043
Client.__init__(self, *args, **kwargs)
1044
self._approvals_pending = 0
1045
1046
self._approvals_pending = 0
1047
# Only now, when this client is initialized, can it show up on
1048
# the D-Bus
1049
client_object_name = unicode(self.name).translate(
1050
{ord("."): ord("_"),
1051
ord("-"): ord("_")})
1052
self.dbus_object_path = (dbus.ObjectPath
1053
("/clients/" + client_object_name))
1054
DBusObjectWithProperties.__init__(self, self.bus,
1055
self.dbus_object_path)
1056
1057
def notifychangeproperty(transform_func,
1058
dbus_name, type_func=lambda x: x,
1059
variant_level=1):
1060
""" Modify a variable so that it's a property which announces
1061
its changes to DBus.
1062
1063
transform_fun: Function that takes a value and a variant_level
1064
and transforms it to a D-Bus type.
1065
dbus_name: D-Bus name of the variable
1066
type_func: Function that transform the value before sending it
1067
to the D-Bus. Default: no transform
1068
variant_level: D-Bus variant level. Default: 1
1069
"""
1070
attrname = "_{0}".format(dbus_name)
1071
def setter(self, value):
1072
if hasattr(self, "dbus_object_path"):
1073
if (not hasattr(self, attrname) or
1074
type_func(getattr(self, attrname, None))
1075
!= type_func(value)):
1076
dbus_value = transform_func(type_func(value),
1077
variant_level
1078
=variant_level)
1079
self.PropertyChanged(dbus.String(dbus_name),
1080
dbus_value)
1081
setattr(self, attrname, value)
1082
1083
return property(lambda self: getattr(self, attrname), setter)
1084
1085
1086
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1087
approvals_pending = notifychangeproperty(dbus.Boolean,
1088
"ApprovalPending",
1089
type_func = bool)
1090
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1091
last_enabled = notifychangeproperty(datetime_to_dbus,
1092
"LastEnabled")
1093
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1094
type_func = lambda checker:
1095
checker is not None)
1096
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1097
"LastCheckedOK")
1098
last_approval_request = notifychangeproperty(
1099
datetime_to_dbus, "LastApprovalRequest")
1100
approved_by_default = notifychangeproperty(dbus.Boolean,
1101
"ApprovedByDefault")
1102
approval_delay = notifychangeproperty(dbus.UInt64,
1103
"ApprovalDelay",
1104
type_func =
1105
timedelta_to_milliseconds)
1106
approval_duration = notifychangeproperty(
1107
dbus.UInt64, "ApprovalDuration",
1108
type_func = timedelta_to_milliseconds)
1109
host = notifychangeproperty(dbus.String, "Host")
1110
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1111
type_func =
1112
timedelta_to_milliseconds)
1113
extended_timeout = notifychangeproperty(
1114
dbus.UInt64, "ExtendedTimeout",
1115
type_func = timedelta_to_milliseconds)
1116
interval = notifychangeproperty(dbus.UInt64,
1117
"Interval",
1118
type_func =
1119
timedelta_to_milliseconds)
1120
checker_command = notifychangeproperty(dbus.String, "Checker")
1121
1122
del notifychangeproperty
1123
1124
def __del__(self, *args, **kwargs):
1125
try:
1126
self.remove_from_connection()
1127
except LookupError:
1128
pass
1129
if hasattr(DBusObjectWithProperties, "__del__"):
1130
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1131
Client.__del__(self, *args, **kwargs)
1132
1133
def checker_callback(self, pid, condition, command,
1134
*args, **kwargs):
1135
self.checker_callback_tag = None
1136
self.checker = None
1137
if os.WIFEXITED(condition):
1138
exitstatus = os.WEXITSTATUS(condition)
1139
# Emit D-Bus signal
1140
self.CheckerCompleted(dbus.Int16(exitstatus),
1141
dbus.Int64(condition),
1142
dbus.String(command))
1143
else:
1144
# Emit D-Bus signal
1145
self.CheckerCompleted(dbus.Int16(-1),
1146
dbus.Int64(condition),
1147
dbus.String(command))
1148
1149
return Client.checker_callback(self, pid, condition, command,
1150
*args, **kwargs)
1151
1152
def start_checker(self, *args, **kwargs):
1153
old_checker = self.checker
1154
if self.checker is not None:
1155
old_checker_pid = self.checker.pid
1156
else:
1157
old_checker_pid = None
1158
r = Client.start_checker(self, *args, **kwargs)
1159
# Only if new checker process was started
1160
if (self.checker is not None
1161
and old_checker_pid != self.checker.pid):
1162
# Emit D-Bus signal
1163
self.CheckerStarted(self.current_checker_command)
1164
return r
1165
1166
def _reset_approved(self):
1167
self.approved = None
1168
return False
1169
1170
def approve(self, value=True):
1171
self.send_changedstate()
1172
self.approved = value
1173
gobject.timeout_add(timedelta_to_milliseconds
1174
(self.approval_duration),
1175
self._reset_approved)
1176
1177
1178
## D-Bus methods, signals & properties
1179
_interface = "se.recompile.Mandos.Client"
1180
1181
## Signals
1182
1183
# CheckerCompleted - signal
1184
@dbus.service.signal(_interface, signature="nxs")
1185
def CheckerCompleted(self, exitcode, waitstatus, command):
1186
"D-Bus signal"
1187
pass
1188
1189
# CheckerStarted - signal
1190
@dbus.service.signal(_interface, signature="s")
1191
def CheckerStarted(self, command):
1192
"D-Bus signal"
1193
pass
1194
1195
# PropertyChanged - signal
1196
@dbus.service.signal(_interface, signature="sv")
1197
def PropertyChanged(self, property, value):
1198
"D-Bus signal"
1199
pass
1200
1201
# GotSecret - signal
1202
@dbus.service.signal(_interface)
1203
def GotSecret(self):
1204
"""D-Bus signal
1205
Is sent after a successful transfer of secret from the Mandos
1206
server to mandos-client
1207
"""
1208
pass
1209
1210
# Rejected - signal
1211
@dbus.service.signal(_interface, signature="s")
1212
def Rejected(self, reason):
1213
"D-Bus signal"
1214
pass
1215
1216
# NeedApproval - signal
1217
@dbus.service.signal(_interface, signature="tb")
1218
def NeedApproval(self, timeout, default):
1219
"D-Bus signal"
1220
return self.need_approval()
1221
1222
# NeRwequest - signal
1223
@dbus.service.signal(_interface, signature="s")
1224
def NewRequest(self, ip):
1225
"""D-Bus signal
1226
Is sent after a client request a password.
1227
"""
1228
pass
1229
1230
## Methods
1231
1232
# Approve - method
1233
@dbus.service.method(_interface, in_signature="b")
1234
def Approve(self, value):
1235
self.approve(value)
1236
1237
# CheckedOK - method
1238
@dbus.service.method(_interface)
1239
def CheckedOK(self):
1240
self.checked_ok()
1241
1242
# Enable - method
1243
@dbus.service.method(_interface)
1244
def Enable(self):
1245
"D-Bus method"
1246
self.enable()
1247
1248
# StartChecker - method
1249
@dbus.service.method(_interface)
1250
def StartChecker(self):
1251
"D-Bus method"
1252
self.start_checker()
1253
1254
# Disable - method
1255
@dbus.service.method(_interface)
1256
def Disable(self):
1257
"D-Bus method"
1258
self.disable()
1259
1260
# StopChecker - method
1261
@dbus.service.method(_interface)
1262
def StopChecker(self):
1263
self.stop_checker()
1264
1265
## Properties
1266
1267
# ApprovalPending - property
1268
@dbus_service_property(_interface, signature="b", access="read")
1269
def ApprovalPending_dbus_property(self):
1270
return dbus.Boolean(bool(self.approvals_pending))
1271
1272
# ApprovedByDefault - property
1273
@dbus_service_property(_interface, signature="b",
1274
access="readwrite")
1275
def ApprovedByDefault_dbus_property(self, value=None):
1276
if value is None: # get
1277
return dbus.Boolean(self.approved_by_default)
1278
self.approved_by_default = bool(value)
1279
1280
# ApprovalDelay - property
1281
@dbus_service_property(_interface, signature="t",
1282
access="readwrite")
1283
def ApprovalDelay_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.UInt64(self.approval_delay_milliseconds())
1286
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1287
1288
# ApprovalDuration - property
1289
@dbus_service_property(_interface, signature="t",
1290
access="readwrite")
1291
def ApprovalDuration_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.UInt64(timedelta_to_milliseconds(
1294
self.approval_duration))
1295
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1296
1297
# Name - property
1298
@dbus_service_property(_interface, signature="s", access="read")
1299
def Name_dbus_property(self):
1300
return dbus.String(self.name)
1301
1302
# Fingerprint - property
1303
@dbus_service_property(_interface, signature="s", access="read")
1304
def Fingerprint_dbus_property(self):
1305
return dbus.String(self.fingerprint)
1306
1307
# Host - property
1308
@dbus_service_property(_interface, signature="s",
1309
access="readwrite")
1310
def Host_dbus_property(self, value=None):
1311
if value is None: # get
1312
return dbus.String(self.host)
1313
self.host = unicode(value)
1314
1315
# Created - property
1316
@dbus_service_property(_interface, signature="s", access="read")
1317
def Created_dbus_property(self):
1318
return datetime_to_dbus(self.created)
1319
1320
# LastEnabled - property
1321
@dbus_service_property(_interface, signature="s", access="read")
1322
def LastEnabled_dbus_property(self):
1323
return datetime_to_dbus(self.last_enabled)
1324
1325
# Enabled - property
1326
@dbus_service_property(_interface, signature="b",
1327
access="readwrite")
1328
def Enabled_dbus_property(self, value=None):
1329
if value is None: # get
1330
return dbus.Boolean(self.enabled)
1331
if value:
1332
self.enable()
1333
else:
1334
self.disable()
1335
1336
# LastCheckedOK - property
1337
@dbus_service_property(_interface, signature="s",
1338
access="readwrite")
1339
def LastCheckedOK_dbus_property(self, value=None):
1340
if value is not None:
1341
self.checked_ok()
1342
return
1343
return datetime_to_dbus(self.last_checked_ok)
1344
1345
# Expires - property
1346
@dbus_service_property(_interface, signature="s", access="read")
1347
def Expires_dbus_property(self):
1348
return datetime_to_dbus(self.expires)
1349
1350
# LastApprovalRequest - property
1351
@dbus_service_property(_interface, signature="s", access="read")
1352
def LastApprovalRequest_dbus_property(self):
1353
return datetime_to_dbus(self.last_approval_request)
1354
1355
# Timeout - property
1356
@dbus_service_property(_interface, signature="t",
1357
access="readwrite")
1358
def Timeout_dbus_property(self, value=None):
1359
if value is None: # get
1360
return dbus.UInt64(self.timeout_milliseconds())
1361
self.timeout = datetime.timedelta(0, 0, 0, value)
1362
if getattr(self, "disable_initiator_tag", None) is None:
1363
return
1364
# Reschedule timeout
1365
gobject.source_remove(self.disable_initiator_tag)
1366
self.disable_initiator_tag = None
1367
self.expires = None
1368
time_to_die = timedelta_to_milliseconds((self
1369
.last_checked_ok
1370
+ self.timeout)
1371
- datetime.datetime
1372
.utcnow())
1373
if time_to_die <= 0:
1374
# The timeout has passed
1375
self.disable()
1376
else:
1377
self.expires = (datetime.datetime.utcnow()
1378
+ datetime.timedelta(milliseconds =
1379
time_to_die))
1380
self.disable_initiator_tag = (gobject.timeout_add
1381
(time_to_die, self.disable))
1382
1383
# ExtendedTimeout - property
1384
@dbus_service_property(_interface, signature="t",
1385
access="readwrite")
1386
def ExtendedTimeout_dbus_property(self, value=None):
1387
if value is None: # get
1388
return dbus.UInt64(self.extended_timeout_milliseconds())
1389
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1390
1391
# Interval - property
1392
@dbus_service_property(_interface, signature="t",
1393
access="readwrite")
1394
def Interval_dbus_property(self, value=None):
1395
if value is None: # get
1396
return dbus.UInt64(self.interval_milliseconds())
1397
self.interval = datetime.timedelta(0, 0, 0, value)
1398
if getattr(self, "checker_initiator_tag", None) is None:
1399
return
1400
if self.enabled:
1401
# Reschedule checker run
1402
gobject.source_remove(self.checker_initiator_tag)
1403
self.checker_initiator_tag = (gobject.timeout_add
1404
(value, self.start_checker))
1405
self.start_checker() # Start one now, too
1406
1407
# Checker - property
1408
@dbus_service_property(_interface, signature="s",
1409
access="readwrite")
1410
def Checker_dbus_property(self, value=None):
1411
if value is None: # get
1412
return dbus.String(self.checker_command)
1413
self.checker_command = unicode(value)
1414
1415
# CheckerRunning - property
1416
@dbus_service_property(_interface, signature="b",
1417
access="readwrite")
1418
def CheckerRunning_dbus_property(self, value=None):
1419
if value is None: # get
1420
return dbus.Boolean(self.checker is not None)
1421
if value:
1422
self.start_checker()
1423
else:
1424
self.stop_checker()
1425
1426
# ObjectPath - property
1427
@dbus_service_property(_interface, signature="o", access="read")
1428
def ObjectPath_dbus_property(self):
1429
return self.dbus_object_path # is already a dbus.ObjectPath
1430
1431
# Secret = property
1432
@dbus_service_property(_interface, signature="ay",
1433
access="write", byte_arrays=True)
1434
def Secret_dbus_property(self, value):
1435
self.secret = str(value)
1436
1437
del _interface
1438
1439
1440
class ProxyClient(object):
1441
def __init__(self, child_pipe, fpr, address):
1442
self._pipe = child_pipe
1443
self._pipe.send(('init', fpr, address))
1444
if not self._pipe.recv():
1445
raise KeyError()
1446
1447
def __getattribute__(self, name):
1448
if name == '_pipe':
1449
return super(ProxyClient, self).__getattribute__(name)
1450
self._pipe.send(('getattr', name))
1451
data = self._pipe.recv()
1452
if data[0] == 'data':
1453
return data[1]
1454
if data[0] == 'function':
1455
def func(*args, **kwargs):
1456
self._pipe.send(('funcall', name, args, kwargs))
1457
return self._pipe.recv()[1]
1458
return func
1459
1460
def __setattr__(self, name, value):
1461
if name == '_pipe':
1462
return super(ProxyClient, self).__setattr__(name, value)
1463
self._pipe.send(('setattr', name, value))
1464
1465
1466
class ClientDBusTransitional(ClientDBus):
1467
__metaclass__ = AlternateDBusNamesMetaclass
1468
1469
1470
class ClientHandler(socketserver.BaseRequestHandler, object):
1471
"""A class to handle client connections.
1472
1473
Instantiated once for each connection to handle it.
438
1474
Note: This will run in its own forked process."""
439
1475
440
1476
def handle(self):
441
logger.info(u"TCP connection from: %s",
442
unicode(self.client_address))
443
session = gnutls.connection.ClientSession\
444
(self.request, gnutls.connection.X509Credentials())
445
446
line = self.request.makefile().readline()
447
logger.debug(u"Protocol version: %r", line)
448
try:
449
if int(line.strip().split()[0]) > 1:
450
raise RuntimeError
451
except (ValueError, IndexError, RuntimeError), error:
452
logger.error(u"Unknown protocol version: %s", error)
453
return
454
455
# Note: gnutls.connection.X509Credentials is really a generic
456
# GnuTLS certificate credentials object so long as no X.509
457
# keys are added to it. Therefore, we can use it here despite
458
# using OpenPGP certificates.
459
460
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
461
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
462
# "+DHE-DSS"))
463
priority = "NORMAL" # Fallback default, since this
464
# MUST be set.
465
if self.server.settings["priority"]:
466
priority = self.server.settings["priority"]
467
gnutls.library.functions.gnutls_priority_set_direct\
468
(session._c_object, priority, None);
469
470
try:
471
session.handshake()
472
except gnutls.errors.GNUTLSError, error:
473
logger.warning(u"Handshake failed: %s", error)
474
# Do not run session.bye() here: the session is not
475
# established. Just abandon the request.
476
return
477
try:
478
fpr = fingerprint(peer_certificate(session))
479
except (TypeError, gnutls.errors.GNUTLSError), error:
480
logger.warning(u"Bad certificate: %s", error)
481
session.bye()
482
return
483
logger.debug(u"Fingerprint: %s", fpr)
484
client = None
485
for c in self.server.clients:
486
if c.fingerprint == fpr:
487
client = c
488
break
489
if not client:
490
logger.warning(u"Client not found for fingerprint: %s",
491
fpr)
492
session.bye()
493
return
494
# Have to check if client.still_valid(), since it is possible
495
# that the client timed out while establishing the GnuTLS
496
# session.
497
if not client.still_valid():
498
logger.warning(u"Client %(name)s is invalid",
499
vars(client))
500
session.bye()
501
return
502
sent_size = 0
503
while sent_size < len(client.secret):
504
sent = session.send(client.secret[sent_size:])
505
logger.debug(u"Sent: %d, remaining: %d",
506
sent, len(client.secret)
507
- (sent_size + sent))
508
sent_size += sent
509
session.bye()
510
511
512
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
513
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1477
with contextlib.closing(self.server.child_pipe) as child_pipe:
1478
logger.info("TCP connection from: %s",
1479
unicode(self.client_address))
1480
logger.debug("Pipe FD: %d",
1481
self.server.child_pipe.fileno())
1482
1483
session = (gnutls.connection
1484
.ClientSession(self.request,
1485
gnutls.connection
1486
.X509Credentials()))
1487
1488
# Note: gnutls.connection.X509Credentials is really a
1489
# generic GnuTLS certificate credentials object so long as
1490
# no X.509 keys are added to it. Therefore, we can use it
1491
# here despite using OpenPGP certificates.
1492
1493
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1494
# "+AES-256-CBC", "+SHA1",
1495
# "+COMP-NULL", "+CTYPE-OPENPGP",
1496
# "+DHE-DSS"))
1497
# Use a fallback default, since this MUST be set.
1498
priority = self.server.gnutls_priority
1499
if priority is None:
1500
priority = "NORMAL"
1501
(gnutls.library.functions
1502
.gnutls_priority_set_direct(session._c_object,
1503
priority, None))
1504
1505
# Start communication using the Mandos protocol
1506
# Get protocol number
1507
line = self.request.makefile().readline()
1508
logger.debug("Protocol version: %r", line)
1509
try:
1510
if int(line.strip().split()[0]) > 1:
1511
raise RuntimeError
1512
except (ValueError, IndexError, RuntimeError) as error:
1513
logger.error("Unknown protocol version: %s", error)
1514
return
1515
1516
# Start GnuTLS connection
1517
try:
1518
session.handshake()
1519
except gnutls.errors.GNUTLSError as error:
1520
logger.warning("Handshake failed: %s", error)
1521
# Do not run session.bye() here: the session is not
1522
# established. Just abandon the request.
1523
return
1524
logger.debug("Handshake succeeded")
1525
1526
approval_required = False
1527
try:
1528
try:
1529
fpr = self.fingerprint(self.peer_certificate
1530
(session))
1531
except (TypeError,
1532
gnutls.errors.GNUTLSError) as error:
1533
logger.warning("Bad certificate: %s", error)
1534
return
1535
logger.debug("Fingerprint: %s", fpr)
1536
1537
try:
1538
client = ProxyClient(child_pipe, fpr,
1539
self.client_address)
1540
except KeyError:
1541
return
1542
1543
if self.server.use_dbus:
1544
# Emit D-Bus signal
1545
client.NewRequest(str(self.client_address))
1546
1547
if client.approval_delay:
1548
delay = client.approval_delay
1549
client.approvals_pending += 1
1550
approval_required = True
1551
1552
while True:
1553
if not client.enabled:
1554
logger.info("Client %s is disabled",
1555
client.name)
1556
if self.server.use_dbus:
1557
# Emit D-Bus signal
1558
client.Rejected("Disabled")
1559
return
1560
1561
if client.approved or not client.approval_delay:
1562
#We are approved or approval is disabled
1563
break
1564
elif client.approved is None:
1565
logger.info("Client %s needs approval",
1566
client.name)
1567
if self.server.use_dbus:
1568
# Emit D-Bus signal
1569
client.NeedApproval(
1570
client.approval_delay_milliseconds(),
1571
client.approved_by_default)
1572
else:
1573
logger.warning("Client %s was not approved",
1574
client.name)
1575
if self.server.use_dbus:
1576
# Emit D-Bus signal
1577
client.Rejected("Denied")
1578
return
1579
1580
#wait until timeout or approved
1581
time = datetime.datetime.now()
1582
client.changedstate.acquire()
1583
(client.changedstate.wait
1584
(float(client.timedelta_to_milliseconds(delay)
1585
/ 1000)))
1586
client.changedstate.release()
1587
time2 = datetime.datetime.now()
1588
if (time2 - time) >= delay:
1589
if not client.approved_by_default:
1590
logger.warning("Client %s timed out while"
1591
" waiting for approval",
1592
client.name)
1593
if self.server.use_dbus:
1594
# Emit D-Bus signal
1595
client.Rejected("Approval timed out")
1596
return
1597
else:
1598
break
1599
else:
1600
delay -= time2 - time
1601
1602
sent_size = 0
1603
while sent_size < len(client.secret):
1604
try:
1605
sent = session.send(client.secret[sent_size:])
1606
except gnutls.errors.GNUTLSError as error:
1607
logger.warning("gnutls send failed")
1608
return
1609
logger.debug("Sent: %d, remaining: %d",
1610
sent, len(client.secret)
1611
- (sent_size + sent))
1612
sent_size += sent
1613
1614
logger.info("Sending secret to %s", client.name)
1615
# bump the timeout using extended_timeout
1616
client.checked_ok(client.extended_timeout)
1617
if self.server.use_dbus:
1618
# Emit D-Bus signal
1619
client.GotSecret()
1620
1621
finally:
1622
if approval_required:
1623
client.approvals_pending -= 1
1624
try:
1625
session.bye()
1626
except gnutls.errors.GNUTLSError as error:
1627
logger.warning("GnuTLS bye failed")
1628
1629
@staticmethod
1630
def peer_certificate(session):
1631
"Return the peer's OpenPGP certificate as a bytestring"
1632
# If not an OpenPGP certificate...
1633
if (gnutls.library.functions
1634
.gnutls_certificate_type_get(session._c_object)
1635
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1636
# ...do the normal thing
1637
return session.peer_certificate
1638
list_size = ctypes.c_uint(1)
1639
cert_list = (gnutls.library.functions
1640
.gnutls_certificate_get_peers
1641
(session._c_object, ctypes.byref(list_size)))
1642
if not bool(cert_list) and list_size.value != 0:
1643
raise gnutls.errors.GNUTLSError("error getting peer"
1644
" certificate")
1645
if list_size.value == 0:
1646
return None
1647
cert = cert_list[0]
1648
return ctypes.string_at(cert.data, cert.size)
1649
1650
@staticmethod
1651
def fingerprint(openpgp):
1652
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1653
# New GnuTLS "datum" with the OpenPGP public key
1654
datum = (gnutls.library.types
1655
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1656
ctypes.POINTER
1657
(ctypes.c_ubyte)),
1658
ctypes.c_uint(len(openpgp))))
1659
# New empty GnuTLS certificate
1660
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1661
(gnutls.library.functions
1662
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1663
# Import the OpenPGP public key into the certificate
1664
(gnutls.library.functions
1665
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1666
gnutls.library.constants
1667
.GNUTLS_OPENPGP_FMT_RAW))
1668
# Verify the self signature in the key
1669
crtverify = ctypes.c_uint()
1670
(gnutls.library.functions
1671
.gnutls_openpgp_crt_verify_self(crt, 0,
1672
ctypes.byref(crtverify)))
1673
if crtverify.value != 0:
1674
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1675
raise (gnutls.errors.CertificateSecurityError
1676
("Verify failed"))
1677
# New buffer for the fingerprint
1678
buf = ctypes.create_string_buffer(20)
1679
buf_len = ctypes.c_size_t()
1680
# Get the fingerprint from the certificate into the buffer
1681
(gnutls.library.functions
1682
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1683
ctypes.byref(buf_len)))
1684
# Deinit the certificate
1685
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1686
# Convert the buffer to a Python bytestring
1687
fpr = ctypes.string_at(buf, buf_len.value)
1688
# Convert the bytestring to hexadecimal notation
1689
hex_fpr = binascii.hexlify(fpr).upper()
1690
return hex_fpr
1691
1692
1693
class MultiprocessingMixIn(object):
1694
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1695
def sub_process_main(self, request, address):
1696
try:
1697
self.finish_request(request, address)
1698
except Exception:
1699
self.handle_error(request, address)
1700
self.close_request(request)
1701
1702
def process_request(self, request, address):
1703
"""Start a new process to process the request."""
1704
proc = multiprocessing.Process(target = self.sub_process_main,
1705
args = (request,
1706
address))
1707
proc.start()
1708
return proc
1709
1710
1711
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1712
""" adds a pipe to the MixIn """
1713
def process_request(self, request, client_address):
1714
"""Overrides and wraps the original process_request().
1715
1716
This function creates a new pipe in self.pipe
1717
"""
1718
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1719
1720
proc = MultiprocessingMixIn.process_request(self, request,
1721
client_address)
1722
self.child_pipe.close()
1723
self.add_pipe(parent_pipe, proc)
1724
1725
def add_pipe(self, parent_pipe, proc):
1726
"""Dummy function; override as necessary"""
1727
raise NotImplementedError
1728
1729
1730
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1731
socketserver.TCPServer, object):
1732
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1733
514
1734
Attributes:
515
settings: Server settings
516
clients: Set() of Client objects
1735
enabled: Boolean; whether this server is activated yet
1736
interface: None or a network interface name (string)
1737
use_ipv6: Boolean; to use IPv6 or not
517
1738
"""
518
address_family = socket.AF_INET6
519
def __init__(self, *args, **kwargs):
520
if "settings" in kwargs:
521
self.settings = kwargs["settings"]
522
del kwargs["settings"]
523
if "clients" in kwargs:
524
self.clients = kwargs["clients"]
525
del kwargs["clients"]
526
return super(type(self), self).__init__(*args, **kwargs)
1739
def __init__(self, server_address, RequestHandlerClass,
1740
interface=None, use_ipv6=True):
1741
self.interface = interface
1742
if use_ipv6:
1743
self.address_family = socket.AF_INET6
1744
socketserver.TCPServer.__init__(self, server_address,
1745
RequestHandlerClass)
527
1746
def server_bind(self):
528
1747
"""This overrides the normal server_bind() function
529
1748
to bind to an interface if one was specified, and also NOT to
530
1749
bind to an address or port if they were not specified."""
531
if self.settings["interface"]:
532
# 25 is from /usr/include/asm-i486/socket.h
533
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
534
try:
535
self.socket.setsockopt(socket.SOL_SOCKET,
536
SO_BINDTODEVICE,
537
self.settings["interface"])
538
except socket.error, error:
539
if error[0] == errno.EPERM:
540
logger.error(u"No permission to"
541
u" bind to interface %s",
542
self.settings["interface"])
543
else:
544
raise error
1750
if self.interface is not None:
1751
if SO_BINDTODEVICE is None:
1752
logger.error("SO_BINDTODEVICE does not exist;"
1753
" cannot bind to interface %s",
1754
self.interface)
1755
else:
1756
try:
1757
self.socket.setsockopt(socket.SOL_SOCKET,
1758
SO_BINDTODEVICE,
1759
str(self.interface
1760
+ '\0'))
1761
except socket.error as error:
1762
if error[0] == errno.EPERM:
1763
logger.error("No permission to"
1764
" bind to interface %s",
1765
self.interface)
1766
elif error[0] == errno.ENOPROTOOPT:
1767
logger.error("SO_BINDTODEVICE not available;"
1768
" cannot bind to interface %s",
1769
self.interface)
1770
else:
1771
raise
545
1772
# Only bind(2) the socket if we really need to.
546
1773
if self.server_address[0] or self.server_address[1]:
547
1774
if not self.server_address[0]:
548
in6addr_any = "::"
549
self.server_address = (in6addr_any,
1775
if self.address_family == socket.AF_INET6:
1776
any_address = "::" # in6addr_any
1777
else:
1778
any_address = socket.INADDR_ANY
1779
self.server_address = (any_address,
550
1780
self.server_address[1])
551
1781
elif not self.server_address[1]:
552
1782
self.server_address = (self.server_address[0],
553
1783
0)
554
# if self.settings["interface"]:
1784
# if self.interface:
555
1785
# self.server_address = (self.server_address[0],
556
1786
# 0, # port
557
1787
# 0, # flowinfo
558
1788
# if_nametoindex
559
# (self.settings
560
# ["interface"]))
561
return super(type(self), self).server_bind()
1789
# (self.interface))
1790
return socketserver.TCPServer.server_bind(self)
1791
1792
1793
class MandosServer(IPv6_TCPServer):
1794
"""Mandos server.
1795
1796
Attributes:
1797
clients: set of Client objects
1798
gnutls_priority GnuTLS priority string
1799
use_dbus: Boolean; to emit D-Bus signals or not
1800
1801
Assumes a gobject.MainLoop event loop.
1802
"""
1803
def __init__(self, server_address, RequestHandlerClass,
1804
interface=None, use_ipv6=True, clients=None,
1805
gnutls_priority=None, use_dbus=True):
1806
self.enabled = False
1807
self.clients = clients
1808
if self.clients is None:
1809
self.clients = {}
1810
self.use_dbus = use_dbus
1811
self.gnutls_priority = gnutls_priority
1812
IPv6_TCPServer.__init__(self, server_address,
1813
RequestHandlerClass,
1814
interface = interface,
1815
use_ipv6 = use_ipv6)
1816
def server_activate(self):
1817
if self.enabled:
1818
return socketserver.TCPServer.server_activate(self)
1819
1820
def enable(self):
1821
self.enabled = True
1822
1823
def add_pipe(self, parent_pipe, proc):
1824
# Call "handle_ipc" for both data and EOF events
1825
gobject.io_add_watch(parent_pipe.fileno(),
1826
gobject.IO_IN | gobject.IO_HUP,
1827
functools.partial(self.handle_ipc,
1828
parent_pipe =
1829
parent_pipe,
1830
proc = proc))
1831
1832
def handle_ipc(self, source, condition, parent_pipe=None,
1833
proc = None, client_object=None):
1834
condition_names = {
1835
gobject.IO_IN: "IN", # There is data to read.
1836
gobject.IO_OUT: "OUT", # Data can be written (without
1837
# blocking).
1838
gobject.IO_PRI: "PRI", # There is urgent data to read.
1839
gobject.IO_ERR: "ERR", # Error condition.
1840
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1841
# broken, usually for pipes and
1842
# sockets).
1843
}
1844
conditions_string = ' | '.join(name
1845
for cond, name in
1846
condition_names.iteritems()
1847
if cond & condition)
1848
# error, or the other end of multiprocessing.Pipe has closed
1849
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1850
# Wait for other process to exit
1851
proc.join()
1852
return False
1853
1854
# Read a request from the child
1855
request = parent_pipe.recv()
1856
command = request[0]
1857
1858
if command == 'init':
1859
fpr = request[1]
1860
address = request[2]
1861
1862
for c in self.clients.itervalues():
1863
if c.fingerprint == fpr:
1864
client = c
1865
break
1866
else:
1867
logger.info("Client not found for fingerprint: %s, ad"
1868
"dress: %s", fpr, address)
1869
if self.use_dbus:
1870
# Emit D-Bus signal
1871
mandos_dbus_service.ClientNotFound(fpr,
1872
address[0])
1873
parent_pipe.send(False)
1874
return False
1875
1876
gobject.io_add_watch(parent_pipe.fileno(),
1877
gobject.IO_IN | gobject.IO_HUP,
1878
functools.partial(self.handle_ipc,
1879
parent_pipe =
1880
parent_pipe,
1881
proc = proc,
1882
client_object =
1883
client))
1884
parent_pipe.send(True)
1885
# remove the old hook in favor of the new above hook on
1886
# same fileno
1887
return False
1888
if command == 'funcall':
1889
funcname = request[1]
1890
args = request[2]
1891
kwargs = request[3]
1892
1893
parent_pipe.send(('data', getattr(client_object,
1894
funcname)(*args,
1895
**kwargs)))
1896
1897
if command == 'getattr':
1898
attrname = request[1]
1899
if callable(client_object.__getattribute__(attrname)):
1900
parent_pipe.send(('function',))
1901
else:
1902
parent_pipe.send(('data', client_object
1903
.__getattribute__(attrname)))
1904
1905
if command == 'setattr':
1906
attrname = request[1]
1907
value = request[2]
1908
setattr(client_object, attrname, value)
1909
1910
return True
562
1911
563
1912
564
1913
def string_to_delta(interval):
565
1914
"""Parse a string and return a datetime.timedelta
566
1915
567
1916
>>> string_to_delta('7d')
568
1917
datetime.timedelta(7)
569
1918
>>> string_to_delta('60s')
572
1921
datetime.timedelta(0, 3600)
573
1922
>>> string_to_delta('24h')
574
1923
datetime.timedelta(1)
575
>>> string_to_delta(u'1w')
1924
>>> string_to_delta('1w')
576
1925
datetime.timedelta(7)
577
1926
>>> string_to_delta('5m 30s')
578
1927
datetime.timedelta(0, 330)
580
1929
timevalue = datetime.timedelta(0)
581
1930
for s in interval.split():
582
1931
try:
583
suffix=unicode(s[-1])
584
value=int(s[:-1])
585
if suffix == u"d":
1932
suffix = unicode(s[-1])
1933
value = int(s[:-1])
1934
if suffix == "d":
586
1935
delta = datetime.timedelta(value)
587
elif suffix == u"s":
1936
elif suffix == "s":
588
1937
delta = datetime.timedelta(0, value)
589
elif suffix == u"m":
1938
elif suffix == "m":
590
1939
delta = datetime.timedelta(0, 0, 0, 0, value)
591
elif suffix == u"h":
1940
elif suffix == "h":
592
1941
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
593
elif suffix == u"w":
1942
elif suffix == "w":
594
1943
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
595
1944
else:
596
raise ValueError
597
except (ValueError, IndexError):
598
raise ValueError
1945
raise ValueError("Unknown suffix %r" % suffix)
1946
except (ValueError, IndexError) as e:
1947
raise ValueError(*(e.args))
599
1948
timevalue += delta
600
1949
return timevalue
601
1950
602
1951
603
def server_state_changed(state):
604
"""Derived from the Avahi example code"""
605
if state == avahi.SERVER_COLLISION:
606
logger.error(u"Server name collision")
607
service.remove()
608
elif state == avahi.SERVER_RUNNING:
609
service.add()
610
611
612
def entry_group_state_changed(state, error):
613
"""Derived from the Avahi example code"""
614
logger.debug(u"state change: %i", state)
615
616
if state == avahi.ENTRY_GROUP_ESTABLISHED:
617
logger.debug(u"Service established.")
618
elif state == avahi.ENTRY_GROUP_COLLISION:
619
logger.warning(u"Service name collision.")
620
service.rename()
621
elif state == avahi.ENTRY_GROUP_FAILURE:
622
logger.critical(u"Error in group state changed %s",
623
unicode(error))
624
raise AvahiGroupError("State changed: %s", str(error))
625
626
def if_nametoindex(interface):
627
"""Call the C function if_nametoindex(), or equivalent"""
628
global if_nametoindex
629
try:
630
if "ctypes.util" not in sys.modules:
631
import ctypes.util
632
if_nametoindex = ctypes.cdll.LoadLibrary\
633
(ctypes.util.find_library("c")).if_nametoindex
634
except (OSError, AttributeError):
635
if "struct" not in sys.modules:
636
import struct
637
if "fcntl" not in sys.modules:
638
import fcntl
639
def if_nametoindex(interface):
640
"Get an interface index the hard way, i.e. using fcntl()"
641
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
642
s = socket.socket()
643
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
644
struct.pack("16s16x", interface))
645
s.close()
646
interface_index = struct.unpack("I", ifreq[16:20])[0]
647
return interface_index
648
return if_nametoindex(interface)
649
650
651
1952
def daemon(nochdir = False, noclose = False):
652
1953
"""See daemon(3). Standard BSD Unix function.
1954
653
1955
This should really exist as os.daemon, but it doesn't (yet)."""
654
1956
if os.fork():
655
1957
sys.exit()
663
1965
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
664
1966
if not stat.S_ISCHR(os.fstat(null).st_mode):
665
1967
raise OSError(errno.ENODEV,
666
"/dev/null not a character device")
1968
"%s not a character device"
1969
% os.path.devnull)
667
1970
os.dup2(null, sys.stdin.fileno())
668
1971
os.dup2(null, sys.stdout.fileno())
669
1972
os.dup2(null, sys.stderr.fileno())
672
1975
673
1976
674
1977
def main():
675
global main_loop_started
676
main_loop_started = False
677
678
parser = OptionParser(version = "%%prog %s" % version)
679
parser.add_option("-i", "--interface", type="string",
680
metavar="IF", help="Bind to interface IF")
681
parser.add_option("-a", "--address", type="string",
682
help="Address to listen for requests on")
683
parser.add_option("-p", "--port", type="int",
684
help="Port number to receive requests on")
685
parser.add_option("--check", action="store_true", default=False,
686
help="Run self-test")
687
parser.add_option("--debug", action="store_true",
688
help="Debug mode; run in foreground and log to"
689
" terminal")
690
parser.add_option("--priority", type="string", help="GnuTLS"
691
" priority string (see GnuTLS documentation)")
692
parser.add_option("--servicename", type="string", metavar="NAME",
693
help="Zeroconf service name")
694
parser.add_option("--configdir", type="string",
695
default="/etc/mandos", metavar="DIR",
696
help="Directory to search for configuration"
697
" files")
698
(options, args) = parser.parse_args()
1978
1979
##################################################################
1980
# Parsing of options, both command line and config file
1981
1982
parser = argparse.ArgumentParser()
1983
parser.add_argument("-v", "--version", action="version",
1984
version = "%%(prog)s %s" % version,
1985
help="show version number and exit")
1986
parser.add_argument("-i", "--interface", metavar="IF",
1987
help="Bind to interface IF")
1988
parser.add_argument("-a", "--address",
1989
help="Address to listen for requests on")
1990
parser.add_argument("-p", "--port", type=int,
1991
help="Port number to receive requests on")
1992
parser.add_argument("--check", action="store_true",
1993
help="Run self-test")
1994
parser.add_argument("--debug", action="store_true",
1995
help="Debug mode; run in foreground and log"
1996
" to terminal")
1997
parser.add_argument("--debuglevel", metavar="LEVEL",
1998
help="Debug level for stdout output")
1999
parser.add_argument("--priority", help="GnuTLS"
2000
" priority string (see GnuTLS documentation)")
2001
parser.add_argument("--servicename",
2002
metavar="NAME", help="Zeroconf service name")
2003
parser.add_argument("--configdir",
2004
default="/etc/mandos", metavar="DIR",
2005
help="Directory to search for configuration"
2006
" files")
2007
parser.add_argument("--no-dbus", action="store_false",
2008
dest="use_dbus", help="Do not provide D-Bus"
2009
" system bus interface")
2010
parser.add_argument("--no-ipv6", action="store_false",
2011
dest="use_ipv6", help="Do not use IPv6")
2012
parser.add_argument("--no-restore", action="store_false",
2013
dest="restore", help="Do not restore stored"
2014
" state")
2015
parser.add_argument("--statedir", metavar="DIR",
2016
help="Directory to save/restore state in")
2017
2018
options = parser.parse_args()
699
2019
700
2020
if options.check:
701
2021
import doctest
710
2030
"priority":
711
2031
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
712
2032
"servicename": "Mandos",
2033
"use_dbus": "True",
2034
"use_ipv6": "True",
2035
"debuglevel": "",
2036
"restore": "True",
2037
"statedir": "/var/lib/mandos"
713
2038
}
714
2039
715
2040
# Parse config file for server-global settings
716
server_config = ConfigParser.SafeConfigParser(server_defaults)
2041
server_config = configparser.SafeConfigParser(server_defaults)
717
2042
del server_defaults
718
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2043
server_config.read(os.path.join(options.configdir,
2044
"mandos.conf"))
719
2045
# Convert the SafeConfigParser object to a dict
720
2046
server_settings = server_config.defaults()
721
# Use getboolean on the boolean config option
722
server_settings["debug"] = server_config.getboolean\
723
("DEFAULT", "debug")
2047
# Use the appropriate methods on the non-string config options
2048
for option in ("debug", "use_dbus", "use_ipv6"):
2049
server_settings[option] = server_config.getboolean("DEFAULT",
2050
option)
2051
if server_settings["port"]:
2052
server_settings["port"] = server_config.getint("DEFAULT",
2053
"port")
724
2054
del server_config
725
2055
726
2056
# Override the settings from the config file with command line
727
2057
# options, if set.
728
2058
for option in ("interface", "address", "port", "debug",
729
"priority", "servicename", "configdir"):
2059
"priority", "servicename", "configdir",
2060
"use_dbus", "use_ipv6", "debuglevel", "restore",
2061
"statedir"):
730
2062
value = getattr(options, option)
731
2063
if value is not None:
732
2064
server_settings[option] = value
733
2065
del options
2066
# Force all strings to be unicode
2067
for option in server_settings.keys():
2068
if type(server_settings[option]) is str:
2069
server_settings[option] = unicode(server_settings[option])
734
2070
# Now we have our good server settings in "server_settings"
735
2071
2072
##################################################################
2073
2074
# For convenience
736
2075
debug = server_settings["debug"]
2076
debuglevel = server_settings["debuglevel"]
2077
use_dbus = server_settings["use_dbus"]
2078
use_ipv6 = server_settings["use_ipv6"]
2079
stored_state_path = os.path.join(server_settings["statedir"],
2080
stored_state_file)
737
2081
738
if not debug:
739
syslogger.setLevel(logging.WARNING)
740
console.setLevel(logging.WARNING)
2082
if debug:
2083
initlogger(debug, logging.DEBUG)
2084
else:
2085
if not debuglevel:
2086
initlogger(debug)
2087
else:
2088
level = getattr(logging, debuglevel.upper())
2089
initlogger(debug, level)
741
2090
742
2091
if server_settings["servicename"] != "Mandos":
743
syslogger.setFormatter(logging.Formatter\
744
('Mandos (%s): %%(levelname)s:'
745
' %%(message)s'
2092
syslogger.setFormatter(logging.Formatter
2093
('Mandos (%s) [%%(process)d]:'
2094
' %%(levelname)s: %%(message)s'
746
2095
% server_settings["servicename"]))
747
2096
748
2097
# Parse config file with clients
749
client_defaults = { "timeout": "1h",
750
"interval": "5m",
751
"checker": "fping -q -- %(host)s",
752
"host": "",
753
}
754
client_config = ConfigParser.SafeConfigParser(client_defaults)
2098
client_config = configparser.SafeConfigParser(Client.client_defaults)
755
2099
client_config.read(os.path.join(server_settings["configdir"],
756
2100
"clients.conf"))
757
2101
758
global service
759
service = AvahiService(name = server_settings["servicename"],
760
type = "_mandos._tcp", );
761
if server_settings["interface"]:
762
service.interface = if_nametoindex(server_settings["interface"])
2102
global mandos_dbus_service
2103
mandos_dbus_service = None
2104
2105
tcp_server = MandosServer((server_settings["address"],
2106
server_settings["port"]),
2107
ClientHandler,
2108
interface=(server_settings["interface"]
2109
or None),
2110
use_ipv6=use_ipv6,
2111
gnutls_priority=
2112
server_settings["priority"],
2113
use_dbus=use_dbus)
2114
if not debug:
2115
pidfilename = "/var/run/mandos.pid"
2116
try:
2117
pidfile = open(pidfilename, "w")
2118
except IOError:
2119
logger.error("Could not open file %r", pidfilename)
2120
2121
try:
2122
uid = pwd.getpwnam("_mandos").pw_uid
2123
gid = pwd.getpwnam("_mandos").pw_gid
2124
except KeyError:
2125
try:
2126
uid = pwd.getpwnam("mandos").pw_uid
2127
gid = pwd.getpwnam("mandos").pw_gid
2128
except KeyError:
2129
try:
2130
uid = pwd.getpwnam("nobody").pw_uid
2131
gid = pwd.getpwnam("nobody").pw_gid
2132
except KeyError:
2133
uid = 65534
2134
gid = 65534
2135
try:
2136
os.setgid(gid)
2137
os.setuid(uid)
2138
except OSError as error:
2139
if error[0] != errno.EPERM:
2140
raise error
2141
2142
if debug:
2143
# Enable all possible GnuTLS debugging
2144
2145
# "Use a log level over 10 to enable all debugging options."
2146
# - GnuTLS manual
2147
gnutls.library.functions.gnutls_global_set_log_level(11)
2148
2149
@gnutls.library.types.gnutls_log_func
2150
def debug_gnutls(level, string):
2151
logger.debug("GnuTLS: %s", string[:-1])
2152
2153
(gnutls.library.functions
2154
.gnutls_global_set_log_function(debug_gnutls))
2155
2156
# Redirect stdin so all checkers get /dev/null
2157
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2158
os.dup2(null, sys.stdin.fileno())
2159
if null > 2:
2160
os.close(null)
2161
2162
# Need to fork before connecting to D-Bus
2163
if not debug:
2164
# Close all input and output, do double fork, etc.
2165
daemon()
2166
2167
gobject.threads_init()
763
2168
764
2169
global main_loop
765
global bus
766
global server
767
2170
# From the Avahi example code
768
2171
DBusGMainLoop(set_as_default=True )
769
2172
main_loop = gobject.MainLoop()
770
2173
bus = dbus.SystemBus()
771
server = dbus.Interface(
772
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
773
avahi.DBUS_INTERFACE_SERVER )
774
2174
# End of Avahi example code
775
776
clients = Set()
777
def remove_from_clients(client):
778
clients.remove(client)
779
if not clients:
780
logger.critical(u"No clients left, exiting")
781
sys.exit()
782
783
clients.update(Set(Client(name = section,
784
stop_hook = remove_from_clients,
785
config
786
= dict(client_config.items(section)))
787
for section in client_config.sections()))
788
if not clients:
789
logger.critical(u"No clients defined")
790
sys.exit(1)
791
792
if debug:
793
# Redirect stdin so all checkers get /dev/null
794
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
795
os.dup2(null, sys.stdin.fileno())
796
if null > 2:
797
os.close(null)
798
else:
799
# No console logging
800
logger.removeHandler(console)
801
# Close all input and output, do double fork, etc.
802
daemon()
803
804
pidfilename = "/var/run/mandos/mandos.pid"
805
pid = os.getpid()
806
try:
807
pidfile = open(pidfilename, "w")
808
pidfile.write(str(pid) + "\n")
809
pidfile.close()
810
del pidfile
811
except IOError, err:
812
logger.error(u"Could not write %s file with PID %d",
813
pidfilename, os.getpid())
2175
if use_dbus:
2176
try:
2177
bus_name = dbus.service.BusName("se.recompile.Mandos",
2178
bus, do_not_queue=True)
2179
old_bus_name = (dbus.service.BusName
2180
("se.bsnet.fukt.Mandos", bus,
2181
do_not_queue=True))
2182
except dbus.exceptions.NameExistsException as e:
2183
logger.error(unicode(e) + ", disabling D-Bus")
2184
use_dbus = False
2185
server_settings["use_dbus"] = False
2186
tcp_server.use_dbus = False
2187
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2188
service = AvahiServiceToSyslog(name =
2189
server_settings["servicename"],
2190
servicetype = "_mandos._tcp",
2191
protocol = protocol, bus = bus)
2192
if server_settings["interface"]:
2193
service.interface = (if_nametoindex
2194
(str(server_settings["interface"])))
2195
2196
global multiprocessing_manager
2197
multiprocessing_manager = multiprocessing.Manager()
2198
2199
client_class = Client
2200
if use_dbus:
2201
client_class = functools.partial(ClientDBusTransitional,
2202
bus = bus)
2203
2204
client_settings = Client.config_parser(client_config)
2205
old_client_settings = {}
2206
clients_data = {}
2207
2208
# Get client data and settings from last running state.
2209
if server_settings["restore"]:
2210
try:
2211
with open(stored_state_path, "rb") as stored_state:
2212
clients_data, old_client_settings = (pickle.load
2213
(stored_state))
2214
os.remove(stored_state_path)
2215
except IOError as e:
2216
logger.warning("Could not load persistent state: {0}"
2217
.format(e))
2218
if e.errno != errno.ENOENT:
2219
raise
2220
except EOFError as e:
2221
logger.warning("Could not load persistent state: "
2222
"EOFError: {0}".format(e))
2223
2224
with PGPEngine() as pgp:
2225
for client_name, client in clients_data.iteritems():
2226
# Decide which value to use after restoring saved state.
2227
# We have three different values: Old config file,
2228
# new config file, and saved state.
2229
# New config value takes precedence if it differs from old
2230
# config value, otherwise use saved state.
2231
for name, value in client_settings[client_name].items():
2232
try:
2233
# For each value in new config, check if it
2234
# differs from the old config value (Except for
2235
# the "secret" attribute)
2236
if (name != "secret" and
2237
value != old_client_settings[client_name]
2238
[name]):
2239
client[name] = value
2240
except KeyError:
2241
pass
2242
2243
# Clients who has passed its expire date can still be
2244
# enabled if its last checker was successful. Clients
2245
# whose checker failed before we stored its state is
2246
# assumed to have failed all checkers during downtime.
2247
if client["enabled"]:
2248
if datetime.datetime.utcnow() >= client["expires"]:
2249
if not client["last_checked_ok"]:
2250
logger.warning(
2251
"disabling client {0} - Client never "
2252
"performed a successfull checker"
2253
.format(client["name"]))
2254
client["enabled"] = False
2255
elif client["last_checker_status"] != 0:
2256
logger.warning(
2257
"disabling client {0} - Client "
2258
"last checker failed with error code {1}"
2259
.format(client["name"],
2260
client["last_checker_status"]))
2261
client["enabled"] = False
2262
else:
2263
client["expires"] = (datetime.datetime
2264
.utcnow()
2265
+ client["timeout"])
2266
2267
try:
2268
client["secret"] = (
2269
pgp.decrypt(client["encrypted_secret"],
2270
client_settings[client_name]
2271
["secret"]))
2272
except PGPError:
2273
# If decryption fails, we use secret from new settings
2274
logger.debug("Failed to decrypt {0} old secret"
2275
.format(client_name))
2276
client["secret"] = (
2277
client_settings[client_name]["secret"])
2278
2279
2280
# Add/remove clients based on new changes made to config
2281
for client_name in set(old_client_settings) - set(client_settings):
2282
del clients_data[client_name]
2283
for client_name in set(client_settings) - set(old_client_settings):
2284
clients_data[client_name] = client_settings[client_name]
2285
2286
# Create clients all clients
2287
for client_name, client in clients_data.iteritems():
2288
tcp_server.clients[client_name] = client_class(
2289
name = client_name, settings = client)
2290
2291
if not tcp_server.clients:
2292
logger.warning("No clients defined")
2293
2294
if not debug:
2295
try:
2296
with pidfile:
2297
pid = os.getpid()
2298
pidfile.write(str(pid) + "\n".encode("utf-8"))
2299
del pidfile
2300
except IOError:
2301
logger.error("Could not write to file %r with PID %d",
2302
pidfilename, pid)
2303
except NameError:
2304
# "pidfile" was never created
2305
pass
2306
del pidfilename
2307
signal.signal(signal.SIGINT, signal.SIG_IGN)
2308
2309
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2310
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2311
2312
if use_dbus:
2313
class MandosDBusService(dbus.service.Object):
2314
"""A D-Bus proxy object"""
2315
def __init__(self):
2316
dbus.service.Object.__init__(self, bus, "/")
2317
_interface = "se.recompile.Mandos"
2318
2319
@dbus.service.signal(_interface, signature="o")
2320
def ClientAdded(self, objpath):
2321
"D-Bus signal"
2322
pass
2323
2324
@dbus.service.signal(_interface, signature="ss")
2325
def ClientNotFound(self, fingerprint, address):
2326
"D-Bus signal"
2327
pass
2328
2329
@dbus.service.signal(_interface, signature="os")
2330
def ClientRemoved(self, objpath, name):
2331
"D-Bus signal"
2332
pass
2333
2334
@dbus.service.method(_interface, out_signature="ao")
2335
def GetAllClients(self):
2336
"D-Bus method"
2337
return dbus.Array(c.dbus_object_path
2338
for c in
2339
tcp_server.clients.itervalues())
2340
2341
@dbus.service.method(_interface,
2342
out_signature="a{oa{sv}}")
2343
def GetAllClientsWithProperties(self):
2344
"D-Bus method"
2345
return dbus.Dictionary(
2346
((c.dbus_object_path, c.GetAll(""))
2347
for c in tcp_server.clients.itervalues()),
2348
signature="oa{sv}")
2349
2350
@dbus.service.method(_interface, in_signature="o")
2351
def RemoveClient(self, object_path):
2352
"D-Bus method"
2353
for c in tcp_server.clients.itervalues():
2354
if c.dbus_object_path == object_path:
2355
del tcp_server.clients[c.name]
2356
c.remove_from_connection()
2357
# Don't signal anything except ClientRemoved
2358
c.disable(quiet=True)
2359
# Emit D-Bus signal
2360
self.ClientRemoved(object_path, c.name)
2361
return
2362
raise KeyError(object_path)
2363
2364
del _interface
2365
2366
class MandosDBusServiceTransitional(MandosDBusService):
2367
__metaclass__ = AlternateDBusNamesMetaclass
2368
mandos_dbus_service = MandosDBusServiceTransitional()
814
2369
815
2370
def cleanup():
816
2371
"Cleanup function; run on exit"
817
global group
818
# From the Avahi example code
819
if not group is None:
820
group.Free()
821
group = None
822
# End of Avahi example code
823
824
while clients:
825
client = clients.pop()
826
client.stop_hook = None
827
client.stop()
2372
service.cleanup()
2373
2374
multiprocessing.active_children()
2375
if not (tcp_server.clients or client_settings):
2376
return
2377
2378
# Store client before exiting. Secrets are encrypted with key
2379
# based on what config file has. If config file is
2380
# removed/edited, old secret will thus be unrecovable.
2381
clients = {}
2382
with PGPEngine() as pgp:
2383
for client in tcp_server.clients.itervalues():
2384
key = client_settings[client.name]["secret"]
2385
client.encrypted_secret = pgp.encrypt(client.secret,
2386
key)
2387
client_dict = {}
2388
2389
# A list of attributes that can not be pickled
2390
# + secret.
2391
exclude = set(("bus", "changedstate", "secret",
2392
"checker"))
2393
for name, typ in (inspect.getmembers
2394
(dbus.service.Object)):
2395
exclude.add(name)
2396
2397
client_dict["encrypted_secret"] = (client
2398
.encrypted_secret)
2399
for attr in client.client_structure:
2400
if attr not in exclude:
2401
client_dict[attr] = getattr(client, attr)
2402
2403
clients[client.name] = client_dict
2404
del client_settings[client.name]["secret"]
2405
2406
try:
2407
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2408
prefix="clients-",
2409
dir=os.path.dirname
2410
(stored_state_path))
2411
with os.fdopen(tempfd, "wb") as stored_state:
2412
pickle.dump((clients, client_settings), stored_state)
2413
os.rename(tempname, stored_state_path)
2414
except (IOError, OSError) as e:
2415
logger.warning("Could not save persistent state: {0}"
2416
.format(e))
2417
if not debug:
2418
try:
2419
os.remove(tempname)
2420
except NameError:
2421
pass
2422
if e.errno not in set((errno.ENOENT, errno.EACCES,
2423
errno.EEXIST)):
2424
raise e
2425
2426
# Delete all clients, and settings from config
2427
while tcp_server.clients:
2428
name, client = tcp_server.clients.popitem()
2429
if use_dbus:
2430
client.remove_from_connection()
2431
# Don't signal anything except ClientRemoved
2432
client.disable(quiet=True)
2433
if use_dbus:
2434
# Emit D-Bus signal
2435
mandos_dbus_service.ClientRemoved(client
2436
.dbus_object_path,
2437
client.name)
2438
client_settings.clear()
828
2439
829
2440
atexit.register(cleanup)
830
2441
831
if not debug:
832
signal.signal(signal.SIGINT, signal.SIG_IGN)
833
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
834
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
835
836
for client in clients:
837
client.start()
838
839
tcp_server = IPv6_TCPServer((server_settings["address"],
840
server_settings["port"]),
841
tcp_handler,
842
settings=server_settings,
843
clients=clients)
2442
for client in tcp_server.clients.itervalues():
2443
if use_dbus:
2444
# Emit D-Bus signal
2445
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2446
# Need to initiate checking of clients
2447
if client.enabled:
2448
client.init_checker()
2449
2450
tcp_server.enable()
2451
tcp_server.server_activate()
2452
844
2453
# Find out what port we got
845
2454
service.port = tcp_server.socket.getsockname()[1]
846
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
847
u" scope_id %d" % tcp_server.socket.getsockname())
2455
if use_ipv6:
2456
logger.info("Now listening on address %r, port %d,"
2457
" flowinfo %d, scope_id %d"
2458
% tcp_server.socket.getsockname())
2459
else: # IPv4
2460
logger.info("Now listening on address %r, port %d"
2461
% tcp_server.socket.getsockname())
848
2462
849
2463
#service.interface = tcp_server.socket.getsockname()[3]
850
2464
851
2465
try:
852
2466
# From the Avahi example code
853
server.connect_to_signal("StateChanged", server_state_changed)
854
2467
try:
855
server_state_changed(server.GetState())
856
except dbus.exceptions.DBusException, error:
857
logger.critical(u"DBusException: %s", error)
2468
service.activate()
2469
except dbus.exceptions.DBusException as error:
2470
logger.critical("DBusException: %s", error)
2471
cleanup()
858
2472
sys.exit(1)
859
2473
# End of Avahi example code
860
2474
861
2475
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
862
2476
lambda *args, **kwargs:
863
tcp_server.handle_request\
864
(*args[2:], **kwargs) or True)
2477
(tcp_server.handle_request
2478
(*args[2:], **kwargs) or True))
865
2479
866
logger.debug(u"Starting main loop")
867
main_loop_started = True
2480
logger.debug("Starting main loop")
868
2481
main_loop.run()
869
except AvahiError, error:
870
logger.critical(u"AvahiError: %s" + unicode(error))
2482
except AvahiError as error:
2483
logger.critical("AvahiError: %s", error)
2484
cleanup()
871
2485
sys.exit(1)
872
2486
except KeyboardInterrupt:
873
2487
if debug:
874
print
2488
print("", file=sys.stderr)
2489
logger.debug("Server received KeyboardInterrupt")
2490
logger.debug("Server exiting")
2491
# Must run before the D-Bus bus name gets deregistered
2492
cleanup()
875
2493
876
2494
if __name__ == '__main__':
877
2495
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0