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- Committer: Teddy Hogeborn
- Date: 2008-09-04 07:30:58 UTC
- mfrom: (24.1.87 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080904073058-h21spydersnh8jml
* README: Improved wording.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
28
27
# along with this program. If not, see
29
28
# <http://www.gnu.org/licenses/>.
30
29
#
31
# Contact the authors at <mandos@recompile.se>.
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
33
from __future__ import division
36
34
37
import SocketServer as socketserver
35
import SocketServer
38
36
import socket
39
import argparse
37
import select
38
from optparse import OptionParser
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
import ConfigParser as configparser
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
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
68
58
69
59
import dbus
70
import dbus.service
71
60
import gobject
72
61
import avahi
73
62
from dbus.mainloop.glib import DBusGMainLoop
74
63
import ctypes
75
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
79
80
try:
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
except AttributeError:
83
try:
84
from IN import SO_BINDTODEVICE
85
except ImportError:
86
SO_BINDTODEVICE = None
87
88
89
version = "1.4.1"
90
stored_state_file = "clients.pickle"
91
92
logger = logging.getLogger()
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
119
' %(message)s'))
120
logger.addHandler(syslogger)
121
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class CryptoError(Exception):
132
pass
133
134
135
class Crypto(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise CryptoError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise CryptoError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
64
65
version = "1.0"
66
67
logger = logging.Logger('mandos')
68
syslogger = logging.handlers.SysLogHandler\
69
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
70
address = "/dev/log")
71
syslogger.setFormatter(logging.Formatter\
72
('Mandos: %(levelname)s: %(message)s'))
73
logger.addHandler(syslogger)
74
75
console = logging.StreamHandler()
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(console)
209
79
210
80
class AvahiError(Exception):
211
def __init__(self, value, *args, **kwargs):
81
def __init__(self, value):
212
82
self.value = value
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
83
def __str__(self):
84
return repr(self.value)
216
85
217
86
class AvahiServiceError(AvahiError):
218
87
pass
223
92
224
93
class AvahiService(object):
225
94
"""An Avahi (Zeroconf) service.
226
227
95
Attributes:
228
96
interface: integer; avahi.IF_UNSPEC or an interface index.
229
97
Used to optionally bind to the specified interface.
237
105
max_renames: integer; maximum number of renames
238
106
rename_count: integer; counter so we only rename after collisions
239
107
a sensible number of times
240
group: D-Bus Entry Group
241
server: D-Bus Server
242
bus: dbus.SystemBus()
243
108
"""
244
109
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
245
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
247
protocol = avahi.PROTO_UNSPEC, bus = None):
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
248
112
self.interface = interface
249
113
self.name = name
250
self.type = servicetype
114
self.type = type
251
115
self.port = port
252
self.TXT = TXT if TXT is not None else []
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
253
120
self.domain = domain
254
121
self.host = host
255
122
self.rename_count = 0
256
123
self.max_renames = max_renames
257
self.protocol = protocol
258
self.group = None # our entry group
259
self.server = None
260
self.bus = bus
261
self.entry_group_state_changed_match = None
262
124
def rename(self):
263
125
"""Derived from the Avahi example code"""
264
126
if self.rename_count >= self.max_renames:
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
267
self.rename_count)
127
logger.critical(u"No suitable Zeroconf service name found"
128
u" after %i retries, exiting.",
129
rename_count)
268
130
raise AvahiServiceError("Too many renames")
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
131
self.name = server.GetAlternativeServiceName(self.name)
132
logger.info(u"Changing Zeroconf service name to %r ...",
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(message)s' % self.name))
273
137
self.remove()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
138
self.add()
280
139
self.rename_count += 1
281
140
def remove(self):
282
141
"""Derived from the Avahi example code"""
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
286
if self.group is not None:
287
self.group.Reset()
142
if group is not None:
143
group.Reset()
288
144
def add(self):
289
145
"""Derived from the Avahi example code"""
290
self.remove()
291
if self.group is None:
292
self.group = dbus.Interface(
293
self.bus.get_object(avahi.DBUS_NAME,
294
self.server.EntryGroupNew()),
295
avahi.DBUS_INTERFACE_ENTRY_GROUP)
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
300
self.name, self.type)
301
self.group.AddService(
302
self.interface,
303
self.protocol,
304
dbus.UInt32(0), # flags
305
self.name, self.type,
306
self.domain, self.host,
307
dbus.UInt16(self.port),
308
avahi.string_array_to_txt_array(self.TXT))
309
self.group.Commit()
310
def entry_group_state_changed(self, state, error):
311
"""Derived from the Avahi example code"""
312
logger.debug("Avahi entry group state change: %i", state)
313
314
if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
logger.debug("Zeroconf service established.")
316
elif state == avahi.ENTRY_GROUP_COLLISION:
317
logger.info("Zeroconf service name collision.")
318
self.rename()
319
elif state == avahi.ENTRY_GROUP_FAILURE:
320
logger.critical("Avahi: Error in group state changed %s",
321
unicode(error))
322
raise AvahiGroupError("State changed: %s"
323
% unicode(error))
324
def cleanup(self):
325
"""Derived from the Avahi example code"""
326
if self.group is not None:
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
332
self.group = None
333
self.remove()
334
def server_state_changed(self, state, error=None):
335
"""Derived from the Avahi example code"""
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
351
elif state == avahi.SERVER_RUNNING:
352
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
358
def activate(self):
359
"""Derived from the Avahi example code"""
360
if self.server is None:
361
self.server = dbus.Interface(
362
self.bus.get_object(avahi.DBUS_NAME,
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
365
avahi.DBUS_INTERFACE_SERVER)
366
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
368
self.server_state_changed(self.server.GetState())
369
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
379
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
169
170
386
171
class Client(object):
387
172
"""A representation of a client host served by this server.
388
389
173
Attributes:
390
approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
393
checker: subprocess.Popen(); a running checker process used
394
to see if the client lives.
395
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
174
name: string; from the config file, used in log messages
175
fingerprint: string (40 or 32 hexadecimal digits); used to
176
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
host: string; available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
190
checker_callback_tag: - '' -
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
399
193
runtime with vars(self) as dict, so that for
400
194
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
405
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
408
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
417
checker, or None.
418
last_enabled: datetime.datetime(); (UTC) or None
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
428
200
"""
429
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
434
435
def timeout_milliseconds(self):
436
"Return the 'timeout' attribute in milliseconds"
437
return timedelta_to_milliseconds(self.timeout)
438
439
def extended_timeout_milliseconds(self):
440
"Return the 'extended_timeout' attribute in milliseconds"
441
return timedelta_to_milliseconds(self.extended_timeout)
442
443
def interval_milliseconds(self):
444
"Return the 'interval' attribute in milliseconds"
445
return timedelta_to_milliseconds(self.interval)
446
447
def approval_delay_milliseconds(self):
448
return timedelta_to_milliseconds(self.approval_delay)
449
450
def __init__(self, name = None, config=None):
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name = None, stop_hook=None, config={}):
451
225
"""Note: the 'checker' key in 'config' sets the
452
226
'checker_command' attribute and *not* the 'checker'
453
227
attribute."""
454
228
self.name = name
455
if config is None:
456
config = {}
457
logger.debug("Creating client %r", self.name)
229
logger.debug(u"Creating client %r", self.name)
458
230
# Uppercase and remove spaces from fingerprint for later
459
231
# comparison purposes with return value from the fingerprint()
460
232
# function
461
self.fingerprint = (config["fingerprint"].upper()
462
.replace(" ", ""))
463
logger.debug(" Fingerprint: %s", self.fingerprint)
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
464
236
if "secret" in config:
465
self.secret = config["secret"].decode("base64")
237
self.secret = config["secret"].decode(u"base64")
466
238
elif "secfile" in config:
467
with open(os.path.expanduser(os.path.expandvars
468
(config["secfile"])),
469
"rb") as secfile:
470
self.secret = secfile.read()
239
sf = open(config["secfile"])
240
self.secret = sf.read()
241
sf.close()
471
242
else:
472
raise TypeError("No secret or secfile for client %s"
243
raise TypeError(u"No secret or secfile for client %s"
473
244
% self.name)
474
245
self.host = config.get("host", "")
475
self.created = datetime.datetime.utcnow()
476
self.enabled = config.get("enabled", True)
477
self.last_approval_request = None
478
if self.enabled:
479
self.last_enabled = datetime.datetime.utcnow()
480
else:
481
self.last_enabled = None
246
self.created = datetime.datetime.now()
482
247
self.last_checked_ok = None
483
self.last_checker_status = None
484
248
self.timeout = string_to_delta(config["timeout"])
485
self.extended_timeout = string_to_delta(config
486
["extended_timeout"])
487
249
self.interval = string_to_delta(config["interval"])
250
self.stop_hook = stop_hook
488
251
self.checker = None
489
252
self.checker_initiator_tag = None
490
self.disable_initiator_tag = None
491
if self.enabled:
492
self.expires = datetime.datetime.utcnow() + self.timeout
493
else:
494
self.expires = None
253
self.stop_initiator_tag = None
495
254
self.checker_callback_tag = None
496
self.checker_command = config["checker"]
497
self.current_checker_command = None
498
self.approved = None
499
self.approved_by_default = config.get("approved_by_default",
500
True)
501
self.approvals_pending = 0
502
self.approval_delay = string_to_delta(
503
config["approval_delay"])
504
self.approval_duration = string_to_delta(
505
config["approval_duration"])
506
self.changedstate = (multiprocessing_manager
507
.Condition(multiprocessing_manager
508
.Lock()))
509
self.client_structure = [attr for attr in
510
self.__dict__.iterkeys()
511
if not attr.startswith("_")]
512
self.client_structure.append("client_structure")
513
514
for name, t in inspect.getmembers(type(self),
515
lambda obj:
516
isinstance(obj,
517
property)):
518
if not name.startswith("_"):
519
self.client_structure.append(name)
520
521
# Send notice to process children that client state has changed
522
def send_changedstate(self):
523
with self.changedstate:
524
self.changedstate.notify_all()
525
526
def enable(self):
255
self.check_command = config["checker"]
256
def start(self):
527
257
"""Start this client's checker and timeout hooks"""
528
if getattr(self, "enabled", False):
529
# Already enabled
530
return
531
self.send_changedstate()
532
self.expires = datetime.datetime.utcnow() + self.timeout
533
self.enabled = True
534
self.last_enabled = datetime.datetime.utcnow()
535
self.init_checker()
536
537
def disable(self, quiet=True):
538
"""Disable this client."""
539
if not getattr(self, "enabled", False):
258
# Schedule a new checker to be started an 'interval' from now,
259
# and every interval from then on.
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
263
# Also start a new checker *right now*.
264
self.start_checker()
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if hasattr(self, "secret") and self.secret:
275
logger.info(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
540
278
return False
541
if not quiet:
542
self.send_changedstate()
543
if not quiet:
544
logger.info("Disabling client %s", self.name)
545
if getattr(self, "disable_initiator_tag", False):
546
gobject.source_remove(self.disable_initiator_tag)
547
self.disable_initiator_tag = None
548
self.expires = None
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
549
282
if getattr(self, "checker_initiator_tag", False):
550
283
gobject.source_remove(self.checker_initiator_tag)
551
284
self.checker_initiator_tag = None
552
285
self.stop_checker()
553
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
554
288
# Do not run this again if called by a gobject.timeout_add
555
289
return False
556
557
290
def __del__(self):
558
self.disable()
559
560
def init_checker(self):
561
# Schedule a new checker to be started an 'interval' from now,
562
# and every interval from then on.
563
self.checker_initiator_tag = (gobject.timeout_add
564
(self.interval_milliseconds(),
565
self.start_checker))
566
# Schedule a disable() when 'timeout' has passed
567
self.disable_initiator_tag = (gobject.timeout_add
568
(self.timeout_milliseconds(),
569
self.disable))
570
# Also start a new checker *right now*.
571
self.start_checker()
572
573
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
574
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
575
296
self.checker_callback_tag = None
576
297
self.checker = None
577
if os.WIFEXITED(condition):
578
self.last_checker_status = os.WEXITSTATUS(condition)
579
if self.last_checker_status == 0:
580
logger.info("Checker for %(name)s succeeded",
581
vars(self))
582
self.checked_ok()
583
else:
584
logger.info("Checker for %(name)s failed",
585
vars(self))
586
else:
587
self.last_checker_status = -1
588
logger.warning("Checker for %(name)s crashed?",
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.info(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
308
logger.warning(u"Checker for %(name)s crashed?",
589
309
vars(self))
590
591
def checked_ok(self, timeout=None):
592
"""Bump up the timeout for this client.
593
594
This should only be called when the client has been seen,
595
alive and well.
596
"""
597
if timeout is None:
598
timeout = self.timeout
599
self.last_checked_ok = datetime.datetime.utcnow()
600
if self.disable_initiator_tag is not None:
601
gobject.source_remove(self.disable_initiator_tag)
602
if getattr(self, "enabled", False):
603
self.disable_initiator_tag = (gobject.timeout_add
604
(timedelta_to_milliseconds
605
(timeout), self.disable))
606
self.expires = datetime.datetime.utcnow() + timeout
607
608
def need_approval(self):
609
self.last_approval_request = datetime.datetime.utcnow()
610
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
611
313
def start_checker(self):
612
314
"""Start a new checker subprocess if one is not running.
613
614
315
If a checker already exists, leave it running and do
615
316
nothing."""
616
317
# The reason for not killing a running checker is that if we
619
320
# client would inevitably timeout, since no checker would get
620
321
# a chance to run to completion. If we instead leave running
621
322
# checkers alone, the checker would have to take more time
622
# than 'timeout' for the client to be disabled, which is as it
623
# should be.
624
625
# If a checker exists, make sure it is not a zombie
626
try:
627
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
628
except (AttributeError, OSError) as error:
629
if (isinstance(error, OSError)
630
and error.errno != errno.ECHILD):
631
raise error
632
else:
633
if pid:
634
logger.warning("Checker was a zombie")
635
gobject.source_remove(self.checker_callback_tag)
636
self.checker_callback(pid, status,
637
self.current_checker_command)
638
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
639
325
if self.checker is None:
640
326
try:
641
# In case checker_command has exactly one % operator
642
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
643
329
except TypeError:
644
330
# Escape attributes for the shell
645
escaped_attrs = dict(
646
(attr,
647
re.escape(unicode(str(getattr(self, attr, "")),
648
errors=
649
'replace')))
650
for attr in
651
self.runtime_expansions)
652
331
escaped_attrs = dict((key, re.escape(str(val)))
332
for key, val in
333
vars(self).iteritems())
653
334
try:
654
command = self.checker_command % escaped_attrs
655
except TypeError as error:
656
logger.error('Could not format string "%s":'
657
' %s', self.checker_command, error)
335
command = self.check_command % escaped_attrs
336
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
658
339
return True # Try again later
659
self.current_checker_command = command
660
340
try:
661
logger.info("Starting checker %r for %s",
341
logger.info(u"Starting checker %r for %s",
662
342
command, self.name)
663
343
# We don't need to redirect stdout and stderr, since
664
344
# in normal mode, that is already done by daemon(),
667
347
self.checker = subprocess.Popen(command,
668
348
close_fds=True,
669
349
shell=True, cwd="/")
670
self.checker_callback_tag = (gobject.child_watch_add
671
(self.checker.pid,
672
self.checker_callback,
673
data=command))
674
# The checker may have completed before the gobject
675
# watch was added. Check for this.
676
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
677
if pid:
678
gobject.source_remove(self.checker_callback_tag)
679
self.checker_callback(pid, status, command)
680
except OSError as error:
681
logger.error("Failed to start subprocess: %s",
350
self.checker_callback_tag = gobject.child_watch_add\
351
(self.checker.pid,
352
self.checker_callback)
353
except OSError, error:
354
logger.error(u"Failed to start subprocess: %s",
682
355
error)
683
356
# Re-run this periodically if run by gobject.timeout_add
684
357
return True
685
686
358
def stop_checker(self):
687
359
"""Force the checker process, if any, to stop."""
688
360
if self.checker_callback_tag:
690
362
self.checker_callback_tag = None
691
363
if getattr(self, "checker", None) is None:
692
364
return
693
logger.debug("Stopping checker for %(name)s", vars(self))
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
694
366
try:
695
367
os.kill(self.checker.pid, signal.SIGTERM)
696
#time.sleep(0.5)
368
#os.sleep(0.5)
697
369
#if self.checker.poll() is None:
698
370
# os.kill(self.checker.pid, signal.SIGKILL)
699
except OSError as error:
371
except OSError, error:
700
372
if error.errno != errno.ESRCH: # No such process
701
373
raise
702
374
self.checker = None
703
704
705
def dbus_service_property(dbus_interface, signature="v",
706
access="readwrite", byte_arrays=False):
707
"""Decorators for marking methods of a DBusObjectWithProperties to
708
become properties on the D-Bus.
709
710
The decorated method will be called with no arguments by "Get"
711
and with one argument by "Set".
712
713
The parameters, where they are supported, are the same as
714
dbus.service.method, except there is only "signature", since the
715
type from Get() and the type sent to Set() is the same.
716
"""
717
# Encoding deeply encoded byte arrays is not supported yet by the
718
# "Set" method, so we fail early here:
719
if byte_arrays and signature != "ay":
720
raise ValueError("Byte arrays not supported for non-'ay'"
721
" signature %r" % signature)
722
def decorator(func):
723
func._dbus_is_property = True
724
func._dbus_interface = dbus_interface
725
func._dbus_signature = signature
726
func._dbus_access = access
727
func._dbus_name = func.__name__
728
if func._dbus_name.endswith("_dbus_property"):
729
func._dbus_name = func._dbus_name[:-14]
730
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
731
return func
732
return decorator
733
734
735
class DBusPropertyException(dbus.exceptions.DBusException):
736
"""A base class for D-Bus property-related exceptions
737
"""
738
def __unicode__(self):
739
return unicode(str(self))
740
741
742
class DBusPropertyAccessException(DBusPropertyException):
743
"""A property's access permissions disallows an operation.
744
"""
745
pass
746
747
748
class DBusPropertyNotFound(DBusPropertyException):
749
"""An attempt was made to access a non-existing property.
750
"""
751
pass
752
753
754
class DBusObjectWithProperties(dbus.service.Object):
755
"""A D-Bus object with properties.
756
757
Classes inheriting from this can use the dbus_service_property
758
decorator to expose methods as D-Bus properties. It exposes the
759
standard Get(), Set(), and GetAll() methods on the D-Bus.
760
"""
761
762
@staticmethod
763
def _is_dbus_property(obj):
764
return getattr(obj, "_dbus_is_property", False)
765
766
def _get_all_dbus_properties(self):
767
"""Returns a generator of (name, attribute) pairs
768
"""
769
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
770
for cls in self.__class__.__mro__
771
for name, prop in
772
inspect.getmembers(cls, self._is_dbus_property))
773
774
def _get_dbus_property(self, interface_name, property_name):
775
"""Returns a bound method if one exists which is a D-Bus
776
property with the specified name and interface.
777
"""
778
for cls in self.__class__.__mro__:
779
for name, value in (inspect.getmembers
780
(cls, self._is_dbus_property)):
781
if (value._dbus_name == property_name
782
and value._dbus_interface == interface_name):
783
return value.__get__(self)
784
785
# No such property
786
raise DBusPropertyNotFound(self.dbus_object_path + ":"
787
+ interface_name + "."
788
+ property_name)
789
790
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
791
out_signature="v")
792
def Get(self, interface_name, property_name):
793
"""Standard D-Bus property Get() method, see D-Bus standard.
794
"""
795
prop = self._get_dbus_property(interface_name, property_name)
796
if prop._dbus_access == "write":
797
raise DBusPropertyAccessException(property_name)
798
value = prop()
799
if not hasattr(value, "variant_level"):
800
return value
801
return type(value)(value, variant_level=value.variant_level+1)
802
803
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
804
def Set(self, interface_name, property_name, value):
805
"""Standard D-Bus property Set() method, see D-Bus standard.
806
"""
807
prop = self._get_dbus_property(interface_name, property_name)
808
if prop._dbus_access == "read":
809
raise DBusPropertyAccessException(property_name)
810
if prop._dbus_get_args_options["byte_arrays"]:
811
# The byte_arrays option is not supported yet on
812
# signatures other than "ay".
813
if prop._dbus_signature != "ay":
814
raise ValueError
815
value = dbus.ByteArray(''.join(unichr(byte)
816
for byte in value))
817
prop(value)
818
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
820
out_signature="a{sv}")
821
def GetAll(self, interface_name):
822
"""Standard D-Bus property GetAll() method, see D-Bus
823
standard.
824
825
Note: Will not include properties with access="write".
826
"""
827
properties = {}
828
for name, prop in self._get_all_dbus_properties():
829
if (interface_name
830
and interface_name != prop._dbus_interface):
831
# Interface non-empty but did not match
832
continue
833
# Ignore write-only properties
834
if prop._dbus_access == "write":
835
continue
836
value = prop()
837
if not hasattr(value, "variant_level"):
838
properties[name] = value
839
continue
840
properties[name] = type(value)(value, variant_level=
841
value.variant_level+1)
842
return dbus.Dictionary(properties, signature="sv")
843
844
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
845
out_signature="s",
846
path_keyword='object_path',
847
connection_keyword='connection')
848
def Introspect(self, object_path, connection):
849
"""Standard D-Bus method, overloaded to insert property tags.
850
"""
851
xmlstring = dbus.service.Object.Introspect(self, object_path,
852
connection)
853
try:
854
document = xml.dom.minidom.parseString(xmlstring)
855
def make_tag(document, name, prop):
856
e = document.createElement("property")
857
e.setAttribute("name", name)
858
e.setAttribute("type", prop._dbus_signature)
859
e.setAttribute("access", prop._dbus_access)
860
return e
861
for if_tag in document.getElementsByTagName("interface"):
862
for tag in (make_tag(document, name, prop)
863
for name, prop
864
in self._get_all_dbus_properties()
865
if prop._dbus_interface
866
== if_tag.getAttribute("name")):
867
if_tag.appendChild(tag)
868
# Add the names to the return values for the
869
# "org.freedesktop.DBus.Properties" methods
870
if (if_tag.getAttribute("name")
871
== "org.freedesktop.DBus.Properties"):
872
for cn in if_tag.getElementsByTagName("method"):
873
if cn.getAttribute("name") == "Get":
874
for arg in cn.getElementsByTagName("arg"):
875
if (arg.getAttribute("direction")
876
== "out"):
877
arg.setAttribute("name", "value")
878
elif cn.getAttribute("name") == "GetAll":
879
for arg in cn.getElementsByTagName("arg"):
880
if (arg.getAttribute("direction")
881
== "out"):
882
arg.setAttribute("name", "props")
883
xmlstring = document.toxml("utf-8")
884
document.unlink()
885
except (AttributeError, xml.dom.DOMException,
886
xml.parsers.expat.ExpatError) as error:
887
logger.error("Failed to override Introspection method",
888
error)
889
return xmlstring
890
891
892
def datetime_to_dbus (dt, variant_level=0):
893
"""Convert a UTC datetime.datetime() to a D-Bus type."""
894
if dt is None:
895
return dbus.String("", variant_level = variant_level)
896
return dbus.String(dt.isoformat(),
897
variant_level=variant_level)
898
899
900
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
901
.__metaclass__):
902
"""Applied to an empty subclass of a D-Bus object, this metaclass
903
will add additional D-Bus attributes matching a certain pattern.
904
"""
905
def __new__(mcs, name, bases, attr):
906
# Go through all the base classes which could have D-Bus
907
# methods, signals, or properties in them
908
for base in (b for b in bases
909
if issubclass(b, dbus.service.Object)):
910
# Go though all attributes of the base class
911
for attrname, attribute in inspect.getmembers(base):
912
# Ignore non-D-Bus attributes, and D-Bus attributes
913
# with the wrong interface name
914
if (not hasattr(attribute, "_dbus_interface")
915
or not attribute._dbus_interface
916
.startswith("se.recompile.Mandos")):
917
continue
918
# Create an alternate D-Bus interface name based on
919
# the current name
920
alt_interface = (attribute._dbus_interface
921
.replace("se.recompile.Mandos",
922
"se.bsnet.fukt.Mandos"))
923
# Is this a D-Bus signal?
924
if getattr(attribute, "_dbus_is_signal", False):
925
# Extract the original non-method function by
926
# black magic
927
nonmethod_func = (dict(
928
zip(attribute.func_code.co_freevars,
929
attribute.__closure__))["func"]
930
.cell_contents)
931
# Create a new, but exactly alike, function
932
# object, and decorate it to be a new D-Bus signal
933
# with the alternate D-Bus interface name
934
new_function = (dbus.service.signal
935
(alt_interface,
936
attribute._dbus_signature)
937
(types.FunctionType(
938
nonmethod_func.func_code,
939
nonmethod_func.func_globals,
940
nonmethod_func.func_name,
941
nonmethod_func.func_defaults,
942
nonmethod_func.func_closure)))
943
# Define a creator of a function to call both the
944
# old and new functions, so both the old and new
945
# signals gets sent when the function is called
946
def fixscope(func1, func2):
947
"""This function is a scope container to pass
948
func1 and func2 to the "call_both" function
949
outside of its arguments"""
950
def call_both(*args, **kwargs):
951
"""This function will emit two D-Bus
952
signals by calling func1 and func2"""
953
func1(*args, **kwargs)
954
func2(*args, **kwargs)
955
return call_both
956
# Create the "call_both" function and add it to
957
# the class
958
attr[attrname] = fixscope(attribute,
959
new_function)
960
# Is this a D-Bus method?
961
elif getattr(attribute, "_dbus_is_method", False):
962
# Create a new, but exactly alike, function
963
# object. Decorate it to be a new D-Bus method
964
# with the alternate D-Bus interface name. Add it
965
# to the class.
966
attr[attrname] = (dbus.service.method
967
(alt_interface,
968
attribute._dbus_in_signature,
969
attribute._dbus_out_signature)
970
(types.FunctionType
971
(attribute.func_code,
972
attribute.func_globals,
973
attribute.func_name,
974
attribute.func_defaults,
975
attribute.func_closure)))
976
# Is this a D-Bus property?
977
elif getattr(attribute, "_dbus_is_property", False):
978
# Create a new, but exactly alike, function
979
# object, and decorate it to be a new D-Bus
980
# property with the alternate D-Bus interface
981
# name. Add it to the class.
982
attr[attrname] = (dbus_service_property
983
(alt_interface,
984
attribute._dbus_signature,
985
attribute._dbus_access,
986
attribute
987
._dbus_get_args_options
988
["byte_arrays"])
989
(types.FunctionType
990
(attribute.func_code,
991
attribute.func_globals,
992
attribute.func_name,
993
attribute.func_defaults,
994
attribute.func_closure)))
995
return type.__new__(mcs, name, bases, attr)
996
997
998
class ClientDBus(Client, DBusObjectWithProperties):
999
"""A Client class using D-Bus
1000
1001
Attributes:
1002
dbus_object_path: dbus.ObjectPath
1003
bus: dbus.SystemBus()
1004
"""
1005
1006
runtime_expansions = (Client.runtime_expansions
1007
+ ("dbus_object_path",))
1008
1009
# dbus.service.Object doesn't use super(), so we can't either.
1010
1011
def __init__(self, bus = None, *args, **kwargs):
1012
self.bus = bus
1013
Client.__init__(self, *args, **kwargs)
1014
1015
self._approvals_pending = 0
1016
# Only now, when this client is initialized, can it show up on
1017
# the D-Bus
1018
client_object_name = unicode(self.name).translate(
1019
{ord("."): ord("_"),
1020
ord("-"): ord("_")})
1021
self.dbus_object_path = (dbus.ObjectPath
1022
("/clients/" + client_object_name))
1023
DBusObjectWithProperties.__init__(self, self.bus,
1024
self.dbus_object_path)
1025
1026
def notifychangeproperty(transform_func,
1027
dbus_name, type_func=lambda x: x,
1028
variant_level=1):
1029
""" Modify a variable so that it's a property which announces
1030
its changes to DBus.
1031
1032
transform_fun: Function that takes a value and a variant_level
1033
and transforms it to a D-Bus type.
1034
dbus_name: D-Bus name of the variable
1035
type_func: Function that transform the value before sending it
1036
to the D-Bus. Default: no transform
1037
variant_level: D-Bus variant level. Default: 1
1038
"""
1039
attrname = "_{0}".format(dbus_name)
1040
def setter(self, value):
1041
if hasattr(self, "dbus_object_path"):
1042
if (not hasattr(self, attrname) or
1043
type_func(getattr(self, attrname, None))
1044
!= type_func(value)):
1045
dbus_value = transform_func(type_func(value),
1046
variant_level
1047
=variant_level)
1048
self.PropertyChanged(dbus.String(dbus_name),
1049
dbus_value)
1050
setattr(self, attrname, value)
1051
1052
return property(lambda self: getattr(self, attrname), setter)
1053
1054
1055
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1056
approvals_pending = notifychangeproperty(dbus.Boolean,
1057
"ApprovalPending",
1058
type_func = bool)
1059
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1060
last_enabled = notifychangeproperty(datetime_to_dbus,
1061
"LastEnabled")
1062
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1063
type_func = lambda checker:
1064
checker is not None)
1065
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1066
"LastCheckedOK")
1067
last_approval_request = notifychangeproperty(
1068
datetime_to_dbus, "LastApprovalRequest")
1069
approved_by_default = notifychangeproperty(dbus.Boolean,
1070
"ApprovedByDefault")
1071
approval_delay = notifychangeproperty(dbus.UInt16,
1072
"ApprovalDelay",
1073
type_func =
1074
timedelta_to_milliseconds)
1075
approval_duration = notifychangeproperty(
1076
dbus.UInt16, "ApprovalDuration",
1077
type_func = timedelta_to_milliseconds)
1078
host = notifychangeproperty(dbus.String, "Host")
1079
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1080
type_func =
1081
timedelta_to_milliseconds)
1082
extended_timeout = notifychangeproperty(
1083
dbus.UInt16, "ExtendedTimeout",
1084
type_func = timedelta_to_milliseconds)
1085
interval = notifychangeproperty(dbus.UInt16,
1086
"Interval",
1087
type_func =
1088
timedelta_to_milliseconds)
1089
checker_command = notifychangeproperty(dbus.String, "Checker")
1090
1091
del notifychangeproperty
1092
1093
def __del__(self, *args, **kwargs):
1094
try:
1095
self.remove_from_connection()
1096
except LookupError:
1097
pass
1098
if hasattr(DBusObjectWithProperties, "__del__"):
1099
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1100
Client.__del__(self, *args, **kwargs)
1101
1102
def checker_callback(self, pid, condition, command,
1103
*args, **kwargs):
1104
self.checker_callback_tag = None
1105
self.checker = None
1106
if os.WIFEXITED(condition):
1107
exitstatus = os.WEXITSTATUS(condition)
1108
# Emit D-Bus signal
1109
self.CheckerCompleted(dbus.Int16(exitstatus),
1110
dbus.Int64(condition),
1111
dbus.String(command))
1112
else:
1113
# Emit D-Bus signal
1114
self.CheckerCompleted(dbus.Int16(-1),
1115
dbus.Int64(condition),
1116
dbus.String(command))
1117
1118
return Client.checker_callback(self, pid, condition, command,
1119
*args, **kwargs)
1120
1121
def start_checker(self, *args, **kwargs):
1122
old_checker = self.checker
1123
if self.checker is not None:
1124
old_checker_pid = self.checker.pid
1125
else:
1126
old_checker_pid = None
1127
r = Client.start_checker(self, *args, **kwargs)
1128
# Only if new checker process was started
1129
if (self.checker is not None
1130
and old_checker_pid != self.checker.pid):
1131
# Emit D-Bus signal
1132
self.CheckerStarted(self.current_checker_command)
1133
return r
1134
1135
def _reset_approved(self):
1136
self.approved = None
1137
return False
1138
1139
def approve(self, value=True):
1140
self.send_changedstate()
1141
self.approved = value
1142
gobject.timeout_add(timedelta_to_milliseconds
1143
(self.approval_duration),
1144
self._reset_approved)
1145
1146
1147
## D-Bus methods, signals & properties
1148
_interface = "se.recompile.Mandos.Client"
1149
1150
## Signals
1151
1152
# CheckerCompleted - signal
1153
@dbus.service.signal(_interface, signature="nxs")
1154
def CheckerCompleted(self, exitcode, waitstatus, command):
1155
"D-Bus signal"
1156
pass
1157
1158
# CheckerStarted - signal
1159
@dbus.service.signal(_interface, signature="s")
1160
def CheckerStarted(self, command):
1161
"D-Bus signal"
1162
pass
1163
1164
# PropertyChanged - signal
1165
@dbus.service.signal(_interface, signature="sv")
1166
def PropertyChanged(self, property, value):
1167
"D-Bus signal"
1168
pass
1169
1170
# GotSecret - signal
1171
@dbus.service.signal(_interface)
1172
def GotSecret(self):
1173
"""D-Bus signal
1174
Is sent after a successful transfer of secret from the Mandos
1175
server to mandos-client
1176
"""
1177
pass
1178
1179
# Rejected - signal
1180
@dbus.service.signal(_interface, signature="s")
1181
def Rejected(self, reason):
1182
"D-Bus signal"
1183
pass
1184
1185
# NeedApproval - signal
1186
@dbus.service.signal(_interface, signature="tb")
1187
def NeedApproval(self, timeout, default):
1188
"D-Bus signal"
1189
return self.need_approval()
1190
1191
# NeRwequest - signal
1192
@dbus.service.signal(_interface, signature="s")
1193
def NewRequest(self, ip):
1194
"""D-Bus signal
1195
Is sent after a client request a password.
1196
"""
1197
pass
1198
1199
## Methods
1200
1201
# Approve - method
1202
@dbus.service.method(_interface, in_signature="b")
1203
def Approve(self, value):
1204
self.approve(value)
1205
1206
# CheckedOK - method
1207
@dbus.service.method(_interface)
1208
def CheckedOK(self):
1209
self.checked_ok()
1210
1211
# Enable - method
1212
@dbus.service.method(_interface)
1213
def Enable(self):
1214
"D-Bus method"
1215
self.enable()
1216
1217
# StartChecker - method
1218
@dbus.service.method(_interface)
1219
def StartChecker(self):
1220
"D-Bus method"
1221
self.start_checker()
1222
1223
# Disable - method
1224
@dbus.service.method(_interface)
1225
def Disable(self):
1226
"D-Bus method"
1227
self.disable()
1228
1229
# StopChecker - method
1230
@dbus.service.method(_interface)
1231
def StopChecker(self):
1232
self.stop_checker()
1233
1234
## Properties
1235
1236
# ApprovalPending - property
1237
@dbus_service_property(_interface, signature="b", access="read")
1238
def ApprovalPending_dbus_property(self):
1239
return dbus.Boolean(bool(self.approvals_pending))
1240
1241
# ApprovedByDefault - property
1242
@dbus_service_property(_interface, signature="b",
1243
access="readwrite")
1244
def ApprovedByDefault_dbus_property(self, value=None):
1245
if value is None: # get
1246
return dbus.Boolean(self.approved_by_default)
1247
self.approved_by_default = bool(value)
1248
1249
# ApprovalDelay - property
1250
@dbus_service_property(_interface, signature="t",
1251
access="readwrite")
1252
def ApprovalDelay_dbus_property(self, value=None):
1253
if value is None: # get
1254
return dbus.UInt64(self.approval_delay_milliseconds())
1255
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1256
1257
# ApprovalDuration - property
1258
@dbus_service_property(_interface, signature="t",
1259
access="readwrite")
1260
def ApprovalDuration_dbus_property(self, value=None):
1261
if value is None: # get
1262
return dbus.UInt64(timedelta_to_milliseconds(
1263
self.approval_duration))
1264
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1265
1266
# Name - property
1267
@dbus_service_property(_interface, signature="s", access="read")
1268
def Name_dbus_property(self):
1269
return dbus.String(self.name)
1270
1271
# Fingerprint - property
1272
@dbus_service_property(_interface, signature="s", access="read")
1273
def Fingerprint_dbus_property(self):
1274
return dbus.String(self.fingerprint)
1275
1276
# Host - property
1277
@dbus_service_property(_interface, signature="s",
1278
access="readwrite")
1279
def Host_dbus_property(self, value=None):
1280
if value is None: # get
1281
return dbus.String(self.host)
1282
self.host = value
1283
1284
# Created - property
1285
@dbus_service_property(_interface, signature="s", access="read")
1286
def Created_dbus_property(self):
1287
return datetime_to_dbus(self.created)
1288
1289
# LastEnabled - property
1290
@dbus_service_property(_interface, signature="s", access="read")
1291
def LastEnabled_dbus_property(self):
1292
return datetime_to_dbus(self.last_enabled)
1293
1294
# Enabled - property
1295
@dbus_service_property(_interface, signature="b",
1296
access="readwrite")
1297
def Enabled_dbus_property(self, value=None):
1298
if value is None: # get
1299
return dbus.Boolean(self.enabled)
1300
if value:
1301
self.enable()
1302
else:
1303
self.disable()
1304
1305
# LastCheckedOK - property
1306
@dbus_service_property(_interface, signature="s",
1307
access="readwrite")
1308
def LastCheckedOK_dbus_property(self, value=None):
1309
if value is not None:
1310
self.checked_ok()
1311
return
1312
return datetime_to_dbus(self.last_checked_ok)
1313
1314
# Expires - property
1315
@dbus_service_property(_interface, signature="s", access="read")
1316
def Expires_dbus_property(self):
1317
return datetime_to_dbus(self.expires)
1318
1319
# LastApprovalRequest - property
1320
@dbus_service_property(_interface, signature="s", access="read")
1321
def LastApprovalRequest_dbus_property(self):
1322
return datetime_to_dbus(self.last_approval_request)
1323
1324
# Timeout - property
1325
@dbus_service_property(_interface, signature="t",
1326
access="readwrite")
1327
def Timeout_dbus_property(self, value=None):
1328
if value is None: # get
1329
return dbus.UInt64(self.timeout_milliseconds())
1330
self.timeout = datetime.timedelta(0, 0, 0, value)
1331
if getattr(self, "disable_initiator_tag", None) is None:
1332
return
1333
# Reschedule timeout
1334
gobject.source_remove(self.disable_initiator_tag)
1335
self.disable_initiator_tag = None
1336
self.expires = None
1337
time_to_die = timedelta_to_milliseconds((self
1338
.last_checked_ok
1339
+ self.timeout)
1340
- datetime.datetime
1341
.utcnow())
1342
if time_to_die <= 0:
1343
# The timeout has passed
1344
self.disable()
1345
else:
1346
self.expires = (datetime.datetime.utcnow()
1347
+ datetime.timedelta(milliseconds =
1348
time_to_die))
1349
self.disable_initiator_tag = (gobject.timeout_add
1350
(time_to_die, self.disable))
1351
1352
# ExtendedTimeout - property
1353
@dbus_service_property(_interface, signature="t",
1354
access="readwrite")
1355
def ExtendedTimeout_dbus_property(self, value=None):
1356
if value is None: # get
1357
return dbus.UInt64(self.extended_timeout_milliseconds())
1358
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1359
1360
# Interval - property
1361
@dbus_service_property(_interface, signature="t",
1362
access="readwrite")
1363
def Interval_dbus_property(self, value=None):
1364
if value is None: # get
1365
return dbus.UInt64(self.interval_milliseconds())
1366
self.interval = datetime.timedelta(0, 0, 0, value)
1367
if getattr(self, "checker_initiator_tag", None) is None:
1368
return
1369
if self.enabled:
1370
# Reschedule checker run
1371
gobject.source_remove(self.checker_initiator_tag)
1372
self.checker_initiator_tag = (gobject.timeout_add
1373
(value, self.start_checker))
1374
self.start_checker() # Start one now, too
1375
1376
# Checker - property
1377
@dbus_service_property(_interface, signature="s",
1378
access="readwrite")
1379
def Checker_dbus_property(self, value=None):
1380
if value is None: # get
1381
return dbus.String(self.checker_command)
1382
self.checker_command = value
1383
1384
# CheckerRunning - property
1385
@dbus_service_property(_interface, signature="b",
1386
access="readwrite")
1387
def CheckerRunning_dbus_property(self, value=None):
1388
if value is None: # get
1389
return dbus.Boolean(self.checker is not None)
1390
if value:
1391
self.start_checker()
1392
else:
1393
self.stop_checker()
1394
1395
# ObjectPath - property
1396
@dbus_service_property(_interface, signature="o", access="read")
1397
def ObjectPath_dbus_property(self):
1398
return self.dbus_object_path # is already a dbus.ObjectPath
1399
1400
# Secret = property
1401
@dbus_service_property(_interface, signature="ay",
1402
access="write", byte_arrays=True)
1403
def Secret_dbus_property(self, value):
1404
self.secret = str(value)
1405
1406
del _interface
1407
1408
1409
class ProxyClient(object):
1410
def __init__(self, child_pipe, fpr, address):
1411
self._pipe = child_pipe
1412
self._pipe.send(('init', fpr, address))
1413
if not self._pipe.recv():
1414
raise KeyError()
1415
1416
def __getattribute__(self, name):
1417
if name == '_pipe':
1418
return super(ProxyClient, self).__getattribute__(name)
1419
self._pipe.send(('getattr', name))
1420
data = self._pipe.recv()
1421
if data[0] == 'data':
1422
return data[1]
1423
if data[0] == 'function':
1424
def func(*args, **kwargs):
1425
self._pipe.send(('funcall', name, args, kwargs))
1426
return self._pipe.recv()[1]
1427
return func
1428
1429
def __setattr__(self, name, value):
1430
if name == '_pipe':
1431
return super(ProxyClient, self).__setattr__(name, value)
1432
self._pipe.send(('setattr', name, value))
1433
1434
1435
class ClientDBusTransitional(ClientDBus):
1436
__metaclass__ = AlternateDBusNamesMetaclass
1437
1438
1439
class ClientHandler(socketserver.BaseRequestHandler, object):
1440
"""A class to handle client connections.
1441
1442
Instantiated once for each connection to handle it.
375
def still_valid(self):
376
"""Has the timeout not yet passed for this client?"""
377
now = datetime.datetime.now()
378
if self.last_checked_ok is None:
379
return now < (self.created + self.timeout)
380
else:
381
return now < (self.last_checked_ok + self.timeout)
382
383
384
def peer_certificate(session):
385
"Return the peer's OpenPGP certificate as a bytestring"
386
# If not an OpenPGP certificate...
387
if gnutls.library.functions.gnutls_certificate_type_get\
388
(session._c_object) \
389
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
390
# ...do the normal thing
391
return session.peer_certificate
392
list_size = ctypes.c_uint()
393
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
394
(session._c_object, ctypes.byref(list_size))
395
if list_size.value == 0:
396
return None
397
cert = cert_list[0]
398
return ctypes.string_at(cert.data, cert.size)
399
400
401
def fingerprint(openpgp):
402
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# New empty GnuTLS certificate
409
crt = gnutls.library.types.gnutls_openpgp_crt_t()
410
gnutls.library.functions.gnutls_openpgp_crt_init\
411
(ctypes.byref(crt))
412
# Import the OpenPGP public key into the certificate
413
gnutls.library.functions.gnutls_openpgp_crt_import\
414
(crt, ctypes.byref(datum),
415
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
416
# Verify the self signature in the key
417
crtverify = ctypes.c_uint();
418
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
419
(crt, 0, ctypes.byref(crtverify))
420
if crtverify.value != 0:
421
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
422
raise gnutls.errors.CertificateSecurityError("Verify failed")
423
# New buffer for the fingerprint
424
buffer = ctypes.create_string_buffer(20)
425
buffer_length = ctypes.c_size_t()
426
# Get the fingerprint from the certificate into the buffer
427
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
428
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
429
# Deinit the certificate
430
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
431
# Convert the buffer to a Python bytestring
432
fpr = ctypes.string_at(buffer, buffer_length.value)
433
# Convert the bytestring to hexadecimal notation
434
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
435
return hex_fpr
436
437
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
439
"""A TCP request handler class.
440
Instantiated by IPv6_TCPServer for each request to handle it.
1443
441
Note: This will run in its own forked process."""
1444
442
1445
443
def handle(self):
1446
with contextlib.closing(self.server.child_pipe) as child_pipe:
1447
logger.info("TCP connection from: %s",
1448
unicode(self.client_address))
1449
logger.debug("Pipe FD: %d",
1450
self.server.child_pipe.fileno())
1451
1452
session = (gnutls.connection
1453
.ClientSession(self.request,
1454
gnutls.connection
1455
.X509Credentials()))
1456
1457
# Note: gnutls.connection.X509Credentials is really a
1458
# generic GnuTLS certificate credentials object so long as
1459
# no X.509 keys are added to it. Therefore, we can use it
1460
# here despite using OpenPGP certificates.
1461
1462
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1463
# "+AES-256-CBC", "+SHA1",
1464
# "+COMP-NULL", "+CTYPE-OPENPGP",
1465
# "+DHE-DSS"))
1466
# Use a fallback default, since this MUST be set.
1467
priority = self.server.gnutls_priority
1468
if priority is None:
1469
priority = "NORMAL"
1470
(gnutls.library.functions
1471
.gnutls_priority_set_direct(session._c_object,
1472
priority, None))
1473
1474
# Start communication using the Mandos protocol
1475
# Get protocol number
1476
line = self.request.makefile().readline()
1477
logger.debug("Protocol version: %r", line)
1478
try:
1479
if int(line.strip().split()[0]) > 1:
1480
raise RuntimeError
1481
except (ValueError, IndexError, RuntimeError) as error:
1482
logger.error("Unknown protocol version: %s", error)
1483
return
1484
1485
# Start GnuTLS connection
1486
try:
1487
session.handshake()
1488
except gnutls.errors.GNUTLSError as error:
1489
logger.warning("Handshake failed: %s", error)
1490
# Do not run session.bye() here: the session is not
1491
# established. Just abandon the request.
1492
return
1493
logger.debug("Handshake succeeded")
1494
1495
approval_required = False
1496
try:
1497
try:
1498
fpr = self.fingerprint(self.peer_certificate
1499
(session))
1500
except (TypeError,
1501
gnutls.errors.GNUTLSError) as error:
1502
logger.warning("Bad certificate: %s", error)
1503
return
1504
logger.debug("Fingerprint: %s", fpr)
1505
1506
try:
1507
client = ProxyClient(child_pipe, fpr,
1508
self.client_address)
1509
except KeyError:
1510
return
1511
1512
if self.server.use_dbus:
1513
# Emit D-Bus signal
1514
client.NewRequest(str(self.client_address))
1515
1516
if client.approval_delay:
1517
delay = client.approval_delay
1518
client.approvals_pending += 1
1519
approval_required = True
1520
1521
while True:
1522
if not client.enabled:
1523
logger.info("Client %s is disabled",
1524
client.name)
1525
if self.server.use_dbus:
1526
# Emit D-Bus signal
1527
client.Rejected("Disabled")
1528
return
1529
1530
if client.approved or not client.approval_delay:
1531
#We are approved or approval is disabled
1532
break
1533
elif client.approved is None:
1534
logger.info("Client %s needs approval",
1535
client.name)
1536
if self.server.use_dbus:
1537
# Emit D-Bus signal
1538
client.NeedApproval(
1539
client.approval_delay_milliseconds(),
1540
client.approved_by_default)
1541
else:
1542
logger.warning("Client %s was not approved",
1543
client.name)
1544
if self.server.use_dbus:
1545
# Emit D-Bus signal
1546
client.Rejected("Denied")
1547
return
1548
1549
#wait until timeout or approved
1550
time = datetime.datetime.now()
1551
client.changedstate.acquire()
1552
(client.changedstate.wait
1553
(float(client.timedelta_to_milliseconds(delay)
1554
/ 1000)))
1555
client.changedstate.release()
1556
time2 = datetime.datetime.now()
1557
if (time2 - time) >= delay:
1558
if not client.approved_by_default:
1559
logger.warning("Client %s timed out while"
1560
" waiting for approval",
1561
client.name)
1562
if self.server.use_dbus:
1563
# Emit D-Bus signal
1564
client.Rejected("Approval timed out")
1565
return
1566
else:
1567
break
1568
else:
1569
delay -= time2 - time
1570
1571
sent_size = 0
1572
while sent_size < len(client.secret):
1573
try:
1574
sent = session.send(client.secret[sent_size:])
1575
except gnutls.errors.GNUTLSError as error:
1576
logger.warning("gnutls send failed")
1577
return
1578
logger.debug("Sent: %d, remaining: %d",
1579
sent, len(client.secret)
1580
- (sent_size + sent))
1581
sent_size += sent
1582
1583
logger.info("Sending secret to %s", client.name)
1584
# bump the timeout using extended_timeout
1585
client.checked_ok(client.extended_timeout)
1586
if self.server.use_dbus:
1587
# Emit D-Bus signal
1588
client.GotSecret()
1589
1590
finally:
1591
if approval_required:
1592
client.approvals_pending -= 1
1593
try:
1594
session.bye()
1595
except gnutls.errors.GNUTLSError as error:
1596
logger.warning("GnuTLS bye failed")
1597
1598
@staticmethod
1599
def peer_certificate(session):
1600
"Return the peer's OpenPGP certificate as a bytestring"
1601
# If not an OpenPGP certificate...
1602
if (gnutls.library.functions
1603
.gnutls_certificate_type_get(session._c_object)
1604
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1605
# ...do the normal thing
1606
return session.peer_certificate
1607
list_size = ctypes.c_uint(1)
1608
cert_list = (gnutls.library.functions
1609
.gnutls_certificate_get_peers
1610
(session._c_object, ctypes.byref(list_size)))
1611
if not bool(cert_list) and list_size.value != 0:
1612
raise gnutls.errors.GNUTLSError("error getting peer"
1613
" certificate")
1614
if list_size.value == 0:
1615
return None
1616
cert = cert_list[0]
1617
return ctypes.string_at(cert.data, cert.size)
1618
1619
@staticmethod
1620
def fingerprint(openpgp):
1621
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1622
# New GnuTLS "datum" with the OpenPGP public key
1623
datum = (gnutls.library.types
1624
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1625
ctypes.POINTER
1626
(ctypes.c_ubyte)),
1627
ctypes.c_uint(len(openpgp))))
1628
# New empty GnuTLS certificate
1629
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1630
(gnutls.library.functions
1631
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1632
# Import the OpenPGP public key into the certificate
1633
(gnutls.library.functions
1634
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1635
gnutls.library.constants
1636
.GNUTLS_OPENPGP_FMT_RAW))
1637
# Verify the self signature in the key
1638
crtverify = ctypes.c_uint()
1639
(gnutls.library.functions
1640
.gnutls_openpgp_crt_verify_self(crt, 0,
1641
ctypes.byref(crtverify)))
1642
if crtverify.value != 0:
1643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1644
raise (gnutls.errors.CertificateSecurityError
1645
("Verify failed"))
1646
# New buffer for the fingerprint
1647
buf = ctypes.create_string_buffer(20)
1648
buf_len = ctypes.c_size_t()
1649
# Get the fingerprint from the certificate into the buffer
1650
(gnutls.library.functions
1651
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1652
ctypes.byref(buf_len)))
1653
# Deinit the certificate
1654
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1655
# Convert the buffer to a Python bytestring
1656
fpr = ctypes.string_at(buf, buf_len.value)
1657
# Convert the bytestring to hexadecimal notation
1658
hex_fpr = binascii.hexlify(fpr).upper()
1659
return hex_fpr
1660
1661
1662
class MultiprocessingMixIn(object):
1663
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1664
def sub_process_main(self, request, address):
1665
try:
1666
self.finish_request(request, address)
1667
except:
1668
self.handle_error(request, address)
1669
self.close_request(request)
1670
1671
def process_request(self, request, address):
1672
"""Start a new process to process the request."""
1673
proc = multiprocessing.Process(target = self.sub_process_main,
1674
args = (request,
1675
address))
1676
proc.start()
1677
return proc
1678
1679
1680
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1681
""" adds a pipe to the MixIn """
1682
def process_request(self, request, client_address):
1683
"""Overrides and wraps the original process_request().
1684
1685
This function creates a new pipe in self.pipe
1686
"""
1687
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1688
1689
proc = MultiprocessingMixIn.process_request(self, request,
1690
client_address)
1691
self.child_pipe.close()
1692
self.add_pipe(parent_pipe, proc)
1693
1694
def add_pipe(self, parent_pipe, proc):
1695
"""Dummy function; override as necessary"""
1696
raise NotImplementedError
1697
1698
1699
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1700
socketserver.TCPServer, object):
1701
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1702
444
logger.info(u"TCP connection from: %s",
445
unicode(self.client_address))
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
449
line = self.request.makefile().readline()
450
logger.debug(u"Protocol version: %r", line)
451
try:
452
if int(line.strip().split()[0]) > 1:
453
raise RuntimeError
454
except (ValueError, IndexError, RuntimeError), error:
455
logger.error(u"Unknown protocol version: %s", error)
456
return
457
458
# Note: gnutls.connection.X509Credentials is really a generic
459
# GnuTLS certificate credentials object so long as no X.509
460
# keys are added to it. Therefore, we can use it here despite
461
# using OpenPGP certificates.
462
463
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
464
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
465
# "+DHE-DSS"))
466
priority = "NORMAL" # Fallback default, since this
467
# MUST be set.
468
if self.server.settings["priority"]:
469
priority = self.server.settings["priority"]
470
gnutls.library.functions.gnutls_priority_set_direct\
471
(session._c_object, priority, None);
472
473
try:
474
session.handshake()
475
except gnutls.errors.GNUTLSError, error:
476
logger.warning(u"Handshake failed: %s", error)
477
# Do not run session.bye() here: the session is not
478
# established. Just abandon the request.
479
return
480
try:
481
fpr = fingerprint(peer_certificate(session))
482
except (TypeError, gnutls.errors.GNUTLSError), error:
483
logger.warning(u"Bad certificate: %s", error)
484
session.bye()
485
return
486
logger.debug(u"Fingerprint: %s", fpr)
487
client = None
488
for c in self.server.clients:
489
if c.fingerprint == fpr:
490
client = c
491
break
492
if not client:
493
logger.warning(u"Client not found for fingerprint: %s",
494
fpr)
495
session.bye()
496
return
497
# Have to check if client.still_valid(), since it is possible
498
# that the client timed out while establishing the GnuTLS
499
# session.
500
if not client.still_valid():
501
logger.warning(u"Client %(name)s is invalid",
502
vars(client))
503
session.bye()
504
return
505
sent_size = 0
506
while sent_size < len(client.secret):
507
sent = session.send(client.secret[sent_size:])
508
logger.debug(u"Sent: %d, remaining: %d",
509
sent, len(client.secret)
510
- (sent_size + sent))
511
sent_size += sent
512
session.bye()
513
514
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
516
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1703
517
Attributes:
1704
enabled: Boolean; whether this server is activated yet
1705
interface: None or a network interface name (string)
1706
use_ipv6: Boolean; to use IPv6 or not
518
settings: Server settings
519
clients: Set() of Client objects
1707
520
"""
1708
def __init__(self, server_address, RequestHandlerClass,
1709
interface=None, use_ipv6=True):
1710
self.interface = interface
1711
if use_ipv6:
1712
self.address_family = socket.AF_INET6
1713
socketserver.TCPServer.__init__(self, server_address,
1714
RequestHandlerClass)
521
address_family = socket.AF_INET6
522
def __init__(self, *args, **kwargs):
523
if "settings" in kwargs:
524
self.settings = kwargs["settings"]
525
del kwargs["settings"]
526
if "clients" in kwargs:
527
self.clients = kwargs["clients"]
528
del kwargs["clients"]
529
return super(type(self), self).__init__(*args, **kwargs)
1715
530
def server_bind(self):
1716
531
"""This overrides the normal server_bind() function
1717
532
to bind to an interface if one was specified, and also NOT to
1718
533
bind to an address or port if they were not specified."""
1719
if self.interface is not None:
1720
if SO_BINDTODEVICE is None:
1721
logger.error("SO_BINDTODEVICE does not exist;"
1722
" cannot bind to interface %s",
1723
self.interface)
1724
else:
1725
try:
1726
self.socket.setsockopt(socket.SOL_SOCKET,
1727
SO_BINDTODEVICE,
1728
str(self.interface
1729
+ '\0'))
1730
except socket.error as error:
1731
if error[0] == errno.EPERM:
1732
logger.error("No permission to"
1733
" bind to interface %s",
1734
self.interface)
1735
elif error[0] == errno.ENOPROTOOPT:
1736
logger.error("SO_BINDTODEVICE not available;"
1737
" cannot bind to interface %s",
1738
self.interface)
1739
else:
1740
raise
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
537
try:
538
self.socket.setsockopt(socket.SOL_SOCKET,
539
SO_BINDTODEVICE,
540
self.settings["interface"])
541
except socket.error, error:
542
if error[0] == errno.EPERM:
543
logger.error(u"No permission to"
544
u" bind to interface %s",
545
self.settings["interface"])
546
else:
547
raise error
1741
548
# Only bind(2) the socket if we really need to.
1742
549
if self.server_address[0] or self.server_address[1]:
1743
550
if not self.server_address[0]:
1744
if self.address_family == socket.AF_INET6:
1745
any_address = "::" # in6addr_any
1746
else:
1747
any_address = socket.INADDR_ANY
1748
self.server_address = (any_address,
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
1749
553
self.server_address[1])
1750
554
elif not self.server_address[1]:
1751
555
self.server_address = (self.server_address[0],
1752
556
0)
1753
# if self.interface:
557
# if self.settings["interface"]:
1754
558
# self.server_address = (self.server_address[0],
1755
559
# 0, # port
1756
560
# 0, # flowinfo
1757
561
# if_nametoindex
1758
# (self.interface))
1759
return socketserver.TCPServer.server_bind(self)
1760
1761
1762
class MandosServer(IPv6_TCPServer):
1763
"""Mandos server.
1764
1765
Attributes:
1766
clients: set of Client objects
1767
gnutls_priority GnuTLS priority string
1768
use_dbus: Boolean; to emit D-Bus signals or not
1769
1770
Assumes a gobject.MainLoop event loop.
1771
"""
1772
def __init__(self, server_address, RequestHandlerClass,
1773
interface=None, use_ipv6=True, clients=None,
1774
gnutls_priority=None, use_dbus=True):
1775
self.enabled = False
1776
self.clients = clients
1777
if self.clients is None:
1778
self.clients = {}
1779
self.use_dbus = use_dbus
1780
self.gnutls_priority = gnutls_priority
1781
IPv6_TCPServer.__init__(self, server_address,
1782
RequestHandlerClass,
1783
interface = interface,
1784
use_ipv6 = use_ipv6)
1785
def server_activate(self):
1786
if self.enabled:
1787
return socketserver.TCPServer.server_activate(self)
1788
1789
def enable(self):
1790
self.enabled = True
1791
1792
def add_pipe(self, parent_pipe, proc):
1793
# Call "handle_ipc" for both data and EOF events
1794
gobject.io_add_watch(parent_pipe.fileno(),
1795
gobject.IO_IN | gobject.IO_HUP,
1796
functools.partial(self.handle_ipc,
1797
parent_pipe =
1798
parent_pipe,
1799
proc = proc))
1800
1801
def handle_ipc(self, source, condition, parent_pipe=None,
1802
proc = None, client_object=None):
1803
condition_names = {
1804
gobject.IO_IN: "IN", # There is data to read.
1805
gobject.IO_OUT: "OUT", # Data can be written (without
1806
# blocking).
1807
gobject.IO_PRI: "PRI", # There is urgent data to read.
1808
gobject.IO_ERR: "ERR", # Error condition.
1809
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1810
# broken, usually for pipes and
1811
# sockets).
1812
}
1813
conditions_string = ' | '.join(name
1814
for cond, name in
1815
condition_names.iteritems()
1816
if cond & condition)
1817
# error, or the other end of multiprocessing.Pipe has closed
1818
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1819
# Wait for other process to exit
1820
proc.join()
1821
return False
1822
1823
# Read a request from the child
1824
request = parent_pipe.recv()
1825
command = request[0]
1826
1827
if command == 'init':
1828
fpr = request[1]
1829
address = request[2]
1830
1831
for c in self.clients.itervalues():
1832
if c.fingerprint == fpr:
1833
client = c
1834
break
1835
else:
1836
logger.info("Client not found for fingerprint: %s, ad"
1837
"dress: %s", fpr, address)
1838
if self.use_dbus:
1839
# Emit D-Bus signal
1840
mandos_dbus_service.ClientNotFound(fpr,
1841
address[0])
1842
parent_pipe.send(False)
1843
return False
1844
1845
gobject.io_add_watch(parent_pipe.fileno(),
1846
gobject.IO_IN | gobject.IO_HUP,
1847
functools.partial(self.handle_ipc,
1848
parent_pipe =
1849
parent_pipe,
1850
proc = proc,
1851
client_object =
1852
client))
1853
parent_pipe.send(True)
1854
# remove the old hook in favor of the new above hook on
1855
# same fileno
1856
return False
1857
if command == 'funcall':
1858
funcname = request[1]
1859
args = request[2]
1860
kwargs = request[3]
1861
1862
parent_pipe.send(('data', getattr(client_object,
1863
funcname)(*args,
1864
**kwargs)))
1865
1866
if command == 'getattr':
1867
attrname = request[1]
1868
if callable(client_object.__getattribute__(attrname)):
1869
parent_pipe.send(('function',))
1870
else:
1871
parent_pipe.send(('data', client_object
1872
.__getattribute__(attrname)))
1873
1874
if command == 'setattr':
1875
attrname = request[1]
1876
value = request[2]
1877
setattr(client_object, attrname, value)
1878
1879
return True
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
1880
565
1881
566
1882
567
def string_to_delta(interval):
1883
568
"""Parse a string and return a datetime.timedelta
1884
569
1885
570
>>> string_to_delta('7d')
1886
571
datetime.timedelta(7)
1887
572
>>> string_to_delta('60s')
1890
575
datetime.timedelta(0, 3600)
1891
576
>>> string_to_delta('24h')
1892
577
datetime.timedelta(1)
1893
>>> string_to_delta('1w')
578
>>> string_to_delta(u'1w')
1894
579
datetime.timedelta(7)
1895
580
>>> string_to_delta('5m 30s')
1896
581
datetime.timedelta(0, 330)
1898
583
timevalue = datetime.timedelta(0)
1899
584
for s in interval.split():
1900
585
try:
1901
suffix = unicode(s[-1])
1902
value = int(s[:-1])
1903
if suffix == "d":
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
588
if suffix == u"d":
1904
589
delta = datetime.timedelta(value)
1905
elif suffix == "s":
590
elif suffix == u"s":
1906
591
delta = datetime.timedelta(0, value)
1907
elif suffix == "m":
592
elif suffix == u"m":
1908
593
delta = datetime.timedelta(0, 0, 0, 0, value)
1909
elif suffix == "h":
594
elif suffix == u"h":
1910
595
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1911
elif suffix == "w":
596
elif suffix == u"w":
1912
597
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1913
598
else:
1914
raise ValueError("Unknown suffix %r" % suffix)
1915
except (ValueError, IndexError) as e:
1916
raise ValueError(*(e.args))
599
raise ValueError
600
except (ValueError, IndexError):
601
raise ValueError
1917
602
timevalue += delta
1918
603
return timevalue
1919
604
1920
605
606
def server_state_changed(state):
607
"""Derived from the Avahi example code"""
608
if state == avahi.SERVER_COLLISION:
609
logger.error(u"Zeroconf server name collision")
610
service.remove()
611
elif state == avahi.SERVER_RUNNING:
612
service.add()
613
614
615
def entry_group_state_changed(state, error):
616
"""Derived from the Avahi example code"""
617
logger.debug(u"Avahi state change: %i", state)
618
619
if state == avahi.ENTRY_GROUP_ESTABLISHED:
620
logger.debug(u"Zeroconf service established.")
621
elif state == avahi.ENTRY_GROUP_COLLISION:
622
logger.warning(u"Zeroconf service name collision.")
623
service.rename()
624
elif state == avahi.ENTRY_GROUP_FAILURE:
625
logger.critical(u"Avahi: Error in group state changed %s",
626
unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
628
629
def if_nametoindex(interface):
630
"""Call the C function if_nametoindex(), or equivalent"""
631
global if_nametoindex
632
try:
633
if "ctypes.util" not in sys.modules:
634
import ctypes.util
635
if_nametoindex = ctypes.cdll.LoadLibrary\
636
(ctypes.util.find_library("c")).if_nametoindex
637
except (OSError, AttributeError):
638
if "struct" not in sys.modules:
639
import struct
640
if "fcntl" not in sys.modules:
641
import fcntl
642
def if_nametoindex(interface):
643
"Get an interface index the hard way, i.e. using fcntl()"
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
645
s = socket.socket()
646
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
647
struct.pack("16s16x", interface))
648
s.close()
649
interface_index = struct.unpack("I", ifreq[16:20])[0]
650
return interface_index
651
return if_nametoindex(interface)
652
653
1921
654
def daemon(nochdir = False, noclose = False):
1922
655
"""See daemon(3). Standard BSD Unix function.
1923
1924
656
This should really exist as os.daemon, but it doesn't (yet)."""
1925
657
if os.fork():
1926
658
sys.exit()
1934
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1935
667
if not stat.S_ISCHR(os.fstat(null).st_mode):
1936
668
raise OSError(errno.ENODEV,
1937
"%s not a character device"
1938
% os.path.devnull)
669
"/dev/null not a character device")
1939
670
os.dup2(null, sys.stdin.fileno())
1940
671
os.dup2(null, sys.stdout.fileno())
1941
672
os.dup2(null, sys.stderr.fileno())
1944
675
1945
676
1946
677
def main():
1947
1948
##################################################################
1949
# Parsing of options, both command line and config file
1950
1951
parser = argparse.ArgumentParser()
1952
parser.add_argument("-v", "--version", action="version",
1953
version = "%%(prog)s %s" % version,
1954
help="show version number and exit")
1955
parser.add_argument("-i", "--interface", metavar="IF",
1956
help="Bind to interface IF")
1957
parser.add_argument("-a", "--address",
1958
help="Address to listen for requests on")
1959
parser.add_argument("-p", "--port", type=int,
1960
help="Port number to receive requests on")
1961
parser.add_argument("--check", action="store_true",
1962
help="Run self-test")
1963
parser.add_argument("--debug", action="store_true",
1964
help="Debug mode; run in foreground and log"
1965
" to terminal")
1966
parser.add_argument("--debuglevel", metavar="LEVEL",
1967
help="Debug level for stdout output")
1968
parser.add_argument("--priority", help="GnuTLS"
1969
" priority string (see GnuTLS documentation)")
1970
parser.add_argument("--servicename",
1971
metavar="NAME", help="Zeroconf service name")
1972
parser.add_argument("--configdir",
1973
default="/etc/mandos", metavar="DIR",
1974
help="Directory to search for configuration"
1975
" files")
1976
parser.add_argument("--no-dbus", action="store_false",
1977
dest="use_dbus", help="Do not provide D-Bus"
1978
" system bus interface")
1979
parser.add_argument("--no-ipv6", action="store_false",
1980
dest="use_ipv6", help="Do not use IPv6")
1981
parser.add_argument("--no-restore", action="store_false",
1982
dest="restore", help="Do not restore stored"
1983
" state")
1984
parser.add_argument("--statedir", metavar="DIR",
1985
help="Directory to save/restore state in")
1986
1987
options = parser.parse_args()
678
global main_loop_started
679
main_loop_started = False
680
681
parser = OptionParser(version = "%%prog %s" % version)
682
parser.add_option("-i", "--interface", type="string",
683
metavar="IF", help="Bind to interface IF")
684
parser.add_option("-a", "--address", type="string",
685
help="Address to listen for requests on")
686
parser.add_option("-p", "--port", type="int",
687
help="Port number to receive requests on")
688
parser.add_option("--check", action="store_true", default=False,
689
help="Run self-test")
690
parser.add_option("--debug", action="store_true",
691
help="Debug mode; run in foreground and log to"
692
" terminal")
693
parser.add_option("--priority", type="string", help="GnuTLS"
694
" priority string (see GnuTLS documentation)")
695
parser.add_option("--servicename", type="string", metavar="NAME",
696
help="Zeroconf service name")
697
parser.add_option("--configdir", type="string",
698
default="/etc/mandos", metavar="DIR",
699
help="Directory to search for configuration"
700
" files")
701
(options, args) = parser.parse_args()
1988
702
1989
703
if options.check:
1990
704
import doctest
1999
713
"priority":
2000
714
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2001
715
"servicename": "Mandos",
2002
"use_dbus": "True",
2003
"use_ipv6": "True",
2004
"debuglevel": "",
2005
"restore": "True",
2006
"statedir": "/var/lib/mandos"
2007
716
}
2008
717
2009
718
# Parse config file for server-global settings
2010
server_config = configparser.SafeConfigParser(server_defaults)
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
2011
720
del server_defaults
2012
server_config.read(os.path.join(options.configdir,
2013
"mandos.conf"))
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2014
722
# Convert the SafeConfigParser object to a dict
2015
723
server_settings = server_config.defaults()
2016
# Use the appropriate methods on the non-string config options
2017
for option in ("debug", "use_dbus", "use_ipv6"):
2018
server_settings[option] = server_config.getboolean("DEFAULT",
2019
option)
2020
if server_settings["port"]:
2021
server_settings["port"] = server_config.getint("DEFAULT",
2022
"port")
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
2023
727
del server_config
2024
728
2025
729
# Override the settings from the config file with command line
2026
730
# options, if set.
2027
731
for option in ("interface", "address", "port", "debug",
2028
"priority", "servicename", "configdir",
2029
"use_dbus", "use_ipv6", "debuglevel", "restore",
2030
"statedir"):
732
"priority", "servicename", "configdir"):
2031
733
value = getattr(options, option)
2032
734
if value is not None:
2033
735
server_settings[option] = value
2034
736
del options
2035
# Force all strings to be unicode
2036
for option in server_settings.keys():
2037
if type(server_settings[option]) is str:
2038
server_settings[option] = unicode(server_settings[option])
2039
737
# Now we have our good server settings in "server_settings"
2040
738
2041
##################################################################
2042
2043
# For convenience
2044
739
debug = server_settings["debug"]
2045
debuglevel = server_settings["debuglevel"]
2046
use_dbus = server_settings["use_dbus"]
2047
use_ipv6 = server_settings["use_ipv6"]
2048
stored_state_path = os.path.join(server_settings["statedir"],
2049
stored_state_file)
2050
740
2051
if debug:
2052
initlogger(logging.DEBUG)
2053
else:
2054
if not debuglevel:
2055
initlogger()
2056
else:
2057
level = getattr(logging, debuglevel.upper())
2058
initlogger(level)
741
if not debug:
742
syslogger.setLevel(logging.WARNING)
743
console.setLevel(logging.WARNING)
2059
744
2060
745
if server_settings["servicename"] != "Mandos":
2061
syslogger.setFormatter(logging.Formatter
2062
('Mandos (%s) [%%(process)d]:'
2063
' %%(levelname)s: %%(message)s'
746
syslogger.setFormatter(logging.Formatter\
747
('Mandos (%s): %%(levelname)s:'
748
' %%(message)s'
2064
749
% server_settings["servicename"]))
2065
750
2066
751
# Parse config file with clients
2067
client_defaults = { "timeout": "5m",
2068
"extended_timeout": "15m",
2069
"interval": "2m",
2070
"checker": "fping -q -- %%(host)s",
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
2071
755
"host": "",
2072
"approval_delay": "0s",
2073
"approval_duration": "1s",
2074
756
}
2075
client_config = configparser.SafeConfigParser(client_defaults)
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
2076
758
client_config.read(os.path.join(server_settings["configdir"],
2077
759
"clients.conf"))
2078
760
2079
global mandos_dbus_service
2080
mandos_dbus_service = None
2081
2082
tcp_server = MandosServer((server_settings["address"],
2083
server_settings["port"]),
2084
ClientHandler,
2085
interface=(server_settings["interface"]
2086
or None),
2087
use_ipv6=use_ipv6,
2088
gnutls_priority=
2089
server_settings["priority"],
2090
use_dbus=use_dbus)
2091
if not debug:
2092
pidfilename = "/var/run/mandos.pid"
2093
try:
2094
pidfile = open(pidfilename, "w")
2095
except IOError:
2096
logger.error("Could not open file %r", pidfilename)
2097
2098
try:
2099
uid = pwd.getpwnam("_mandos").pw_uid
2100
gid = pwd.getpwnam("_mandos").pw_gid
2101
except KeyError:
2102
try:
2103
uid = pwd.getpwnam("mandos").pw_uid
2104
gid = pwd.getpwnam("mandos").pw_gid
2105
except KeyError:
2106
try:
2107
uid = pwd.getpwnam("nobody").pw_uid
2108
gid = pwd.getpwnam("nobody").pw_gid
2109
except KeyError:
2110
uid = 65534
2111
gid = 65534
2112
try:
2113
os.setgid(gid)
2114
os.setuid(uid)
2115
except OSError as error:
2116
if error[0] != errno.EPERM:
2117
raise error
2118
2119
if debug:
2120
# Enable all possible GnuTLS debugging
2121
2122
# "Use a log level over 10 to enable all debugging options."
2123
# - GnuTLS manual
2124
gnutls.library.functions.gnutls_global_set_log_level(11)
2125
2126
@gnutls.library.types.gnutls_log_func
2127
def debug_gnutls(level, string):
2128
logger.debug("GnuTLS: %s", string[:-1])
2129
2130
(gnutls.library.functions
2131
.gnutls_global_set_log_function(debug_gnutls))
2132
2133
# Redirect stdin so all checkers get /dev/null
2134
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2135
os.dup2(null, sys.stdin.fileno())
2136
if null > 2:
2137
os.close(null)
2138
else:
2139
# No console logging
2140
logger.removeHandler(console)
2141
2142
# Need to fork before connecting to D-Bus
2143
if not debug:
2144
# Close all input and output, do double fork, etc.
2145
daemon()
761
global service
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
764
if server_settings["interface"]:
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
2146
767
2147
768
global main_loop
769
global bus
770
global server
2148
771
# From the Avahi example code
2149
772
DBusGMainLoop(set_as_default=True )
2150
773
main_loop = gobject.MainLoop()
2151
774
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
2152
778
# End of Avahi example code
2153
if use_dbus:
2154
try:
2155
bus_name = dbus.service.BusName("se.recompile.Mandos",
2156
bus, do_not_queue=True)
2157
old_bus_name = (dbus.service.BusName
2158
("se.bsnet.fukt.Mandos", bus,
2159
do_not_queue=True))
2160
except dbus.exceptions.NameExistsException as e:
2161
logger.error(unicode(e) + ", disabling D-Bus")
2162
use_dbus = False
2163
server_settings["use_dbus"] = False
2164
tcp_server.use_dbus = False
2165
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2166
service = AvahiServiceToSyslog(name =
2167
server_settings["servicename"],
2168
servicetype = "_mandos._tcp",
2169
protocol = protocol, bus = bus)
2170
if server_settings["interface"]:
2171
service.interface = (if_nametoindex
2172
(str(server_settings["interface"])))
2173
2174
global multiprocessing_manager
2175
multiprocessing_manager = multiprocessing.Manager()
2176
2177
client_class = Client
2178
if use_dbus:
2179
client_class = functools.partial(ClientDBusTransitional,
2180
bus = bus)
2181
2182
special_settings = {
2183
# Some settings need to be accessd by special methods;
2184
# booleans need .getboolean(), etc. Here is a list of them:
2185
"approved_by_default":
2186
lambda section:
2187
client_config.getboolean(section, "approved_by_default"),
2188
"enabled":
2189
lambda section:
2190
client_config.getboolean(section, "enabled"),
2191
}
2192
# Construct a new dict of client settings of this form:
2193
# { client_name: {setting_name: value, ...}, ...}
2194
# with exceptions for any special settings as defined above
2195
client_settings = dict((clientname,
2196
dict((setting,
2197
(value
2198
if setting not in special_settings
2199
else special_settings[setting]
2200
(clientname)))
2201
for setting, value in
2202
client_config.items(clientname)))
2203
for clientname in client_config.sections())
2204
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
2221
with Crypto() as crypt:
2222
for client in clients_data:
2223
client_name = client["name"]
2224
2225
# Decide which value to use after restoring saved state.
2226
# We have three different values: Old config file,
2227
# new config file, and saved state.
2228
# New config value takes precedence if it differs from old
2229
# config value, otherwise use saved state.
2230
for name, value in client_settings[client_name].items():
2231
try:
2232
# For each value in new config, check if it
2233
# differs from the old config value (Except for
2234
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
2238
setattr(client, name, value)
2239
except KeyError:
2240
pass
2241
2242
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was sucessful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2246
if client["enabled"] and client["last_checked_ok"]:
2247
if ((datetime.datetime.utcnow()
2248
- client["last_checked_ok"])
2249
> client["interval"]):
2250
if client["last_checker_status"] != 0:
2251
client["enabled"] = False
2252
else:
2253
client["expires"] = (datetime.datetime
2254
.utcnow()
2255
+ client["timeout"])
2256
2257
client["changedstate"] = (multiprocessing_manager
2258
.Condition
2259
(multiprocessing_manager
2260
.Lock()))
2261
if use_dbus:
2262
new_client = (ClientDBusTransitional.__new__
2263
(ClientDBusTransitional))
2264
tcp_server.clients[client_name] = new_client
2265
new_client.bus = bus
2266
for name, value in client.iteritems():
2267
setattr(new_client, name, value)
2268
client_object_name = unicode(client_name).translate(
2269
{ord("."): ord("_"),
2270
ord("-"): ord("_")})
2271
new_client.dbus_object_path = (dbus.ObjectPath
2272
("/clients/"
2273
+ client_object_name))
2274
DBusObjectWithProperties.__init__(new_client,
2275
new_client.bus,
2276
new_client
2277
.dbus_object_path)
2278
else:
2279
tcp_server.clients[client_name] = (Client.__new__
2280
(Client))
2281
for name, value in client.iteritems():
2282
setattr(tcp_server.clients[client_name],
2283
name, value)
2284
2285
try:
2286
tcp_server.clients[client_name].secret = (
2287
crypt.decrypt(tcp_server.clients[client_name]
2288
.encrypted_secret,
2289
client_settings[client_name]
2290
["secret"]))
2291
except CryptoError:
2292
# If decryption fails, we use secret from new settings
2293
tcp_server.clients[client_name].secret = (
2294
client_settings[client_name]["secret"])
2295
2296
# Create/remove clients based on new changes made to config
2297
for clientname in set(old_client_settings) - set(client_settings):
2298
del tcp_server.clients[clientname]
2299
for clientname in set(client_settings) - set(old_client_settings):
2300
tcp_server.clients[clientname] = (client_class(name
2301
= clientname,
2302
config =
2303
client_settings
2304
[clientname]))
2305
2306
if not tcp_server.clients:
2307
logger.warning("No clients defined")
779
780
clients = Set()
781
def remove_from_clients(client):
782
clients.remove(client)
783
if not clients:
784
logger.critical(u"No clients left, exiting")
785
sys.exit()
786
787
clients.update(Set(Client(name = section,
788
stop_hook = remove_from_clients,
789
config
790
= dict(client_config.items(section)))
791
for section in client_config.sections()))
792
if not clients:
793
logger.critical(u"No clients defined")
794
sys.exit(1)
795
796
if debug:
797
# Redirect stdin so all checkers get /dev/null
798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
799
os.dup2(null, sys.stdin.fileno())
800
if null > 2:
801
os.close(null)
802
else:
803
# No console logging
804
logger.removeHandler(console)
805
# Close all input and output, do double fork, etc.
806
daemon()
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
810
try:
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
814
del pidfile
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
818
819
def cleanup():
820
"Cleanup function; run on exit"
821
global group
822
# From the Avahi example code
823
if not group is None:
824
group.Free()
825
group = None
826
# End of Avahi example code
2308
827
828
while clients:
829
client = clients.pop()
830
client.stop_hook = None
831
client.stop()
832
833
atexit.register(cleanup)
834
2309
835
if not debug:
2310
try:
2311
with pidfile:
2312
pid = os.getpid()
2313
pidfile.write(str(pid) + "\n".encode("utf-8"))
2314
del pidfile
2315
except IOError:
2316
logger.error("Could not write to file %r with PID %d",
2317
pidfilename, pid)
2318
except NameError:
2319
# "pidfile" was never created
2320
pass
2321
del pidfilename
2322
2323
836
signal.signal(signal.SIGINT, signal.SIG_IGN)
2324
2325
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2326
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2327
839
2328
if use_dbus:
2329
class MandosDBusService(dbus.service.Object):
2330
"""A D-Bus proxy object"""
2331
def __init__(self):
2332
dbus.service.Object.__init__(self, bus, "/")
2333
_interface = "se.recompile.Mandos"
2334
2335
@dbus.service.signal(_interface, signature="o")
2336
def ClientAdded(self, objpath):
2337
"D-Bus signal"
2338
pass
2339
2340
@dbus.service.signal(_interface, signature="ss")
2341
def ClientNotFound(self, fingerprint, address):
2342
"D-Bus signal"
2343
pass
2344
2345
@dbus.service.signal(_interface, signature="os")
2346
def ClientRemoved(self, objpath, name):
2347
"D-Bus signal"
2348
pass
2349
2350
@dbus.service.method(_interface, out_signature="ao")
2351
def GetAllClients(self):
2352
"D-Bus method"
2353
return dbus.Array(c.dbus_object_path
2354
for c in
2355
tcp_server.clients.itervalues())
2356
2357
@dbus.service.method(_interface,
2358
out_signature="a{oa{sv}}")
2359
def GetAllClientsWithProperties(self):
2360
"D-Bus method"
2361
return dbus.Dictionary(
2362
((c.dbus_object_path, c.GetAll(""))
2363
for c in tcp_server.clients.itervalues()),
2364
signature="oa{sv}")
2365
2366
@dbus.service.method(_interface, in_signature="o")
2367
def RemoveClient(self, object_path):
2368
"D-Bus method"
2369
for c in tcp_server.clients.itervalues():
2370
if c.dbus_object_path == object_path:
2371
del tcp_server.clients[c.name]
2372
c.remove_from_connection()
2373
# Don't signal anything except ClientRemoved
2374
c.disable(quiet=True)
2375
# Emit D-Bus signal
2376
self.ClientRemoved(object_path, c.name)
2377
return
2378
raise KeyError(object_path)
2379
2380
del _interface
2381
2382
class MandosDBusServiceTransitional(MandosDBusService):
2383
__metaclass__ = AlternateDBusNamesMetaclass
2384
mandos_dbus_service = MandosDBusServiceTransitional()
2385
2386
def cleanup():
2387
"Cleanup function; run on exit"
2388
service.cleanup()
2389
2390
multiprocessing.active_children()
2391
if not (tcp_server.clients or client_settings):
2392
return
2393
2394
# Store client before exiting. Secrets are encrypted with key
2395
# based on what config file has. If config file is
2396
# removed/edited, old secret will thus be unrecovable.
2397
clients = []
2398
with Crypto() as crypt:
2399
for client in tcp_server.clients.itervalues():
2400
key = client_settings[client.name]["secret"]
2401
client.encrypted_secret = crypt.encrypt(client.secret,
2402
key)
2403
client_dict = {}
2404
2405
# A list of attributes that will not be stored when
2406
# shutting down.
2407
exclude = set(("bus", "changedstate", "secret"))
2408
for name, typ in (inspect.getmembers
2409
(dbus.service.Object)):
2410
exclude.add(name)
2411
2412
client_dict["encrypted_secret"] = (client
2413
.encrypted_secret)
2414
for attr in client.client_structure:
2415
if attr not in exclude:
2416
client_dict[attr] = getattr(client, attr)
2417
2418
clients.append(client_dict)
2419
del client_settings[client.name]["secret"]
2420
2421
try:
2422
with os.fdopen(os.open(stored_state_path,
2423
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2424
0600), "wb") as stored_state:
2425
pickle.dump((clients, client_settings), stored_state)
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
2429
if e.errno not in (errno.ENOENT, errno.EACCES):
2430
raise
2431
2432
# Delete all clients, and settings from config
2433
while tcp_server.clients:
2434
name, client = tcp_server.clients.popitem()
2435
if use_dbus:
2436
client.remove_from_connection()
2437
# Don't signal anything except ClientRemoved
2438
client.disable(quiet=True)
2439
if use_dbus:
2440
# Emit D-Bus signal
2441
mandos_dbus_service.ClientRemoved(client
2442
.dbus_object_path,
2443
client.name)
2444
client_settings.clear()
2445
2446
atexit.register(cleanup)
2447
2448
for client in tcp_server.clients.itervalues():
2449
if use_dbus:
2450
# Emit D-Bus signal
2451
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2452
# Need to initiate checking of clients
2453
if client.enabled:
2454
client.init_checker()
2455
2456
tcp_server.enable()
2457
tcp_server.server_activate()
2458
840
for client in clients:
841
client.start()
842
843
tcp_server = IPv6_TCPServer((server_settings["address"],
844
server_settings["port"]),
845
tcp_handler,
846
settings=server_settings,
847
clients=clients)
2459
848
# Find out what port we got
2460
849
service.port = tcp_server.socket.getsockname()[1]
2461
if use_ipv6:
2462
logger.info("Now listening on address %r, port %d,"
2463
" flowinfo %d, scope_id %d"
2464
% tcp_server.socket.getsockname())
2465
else: # IPv4
2466
logger.info("Now listening on address %r, port %d"
2467
% tcp_server.socket.getsockname())
850
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
851
u" scope_id %d" % tcp_server.socket.getsockname())
2468
852
2469
853
#service.interface = tcp_server.socket.getsockname()[3]
2470
854
2471
855
try:
2472
856
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
2473
858
try:
2474
service.activate()
2475
except dbus.exceptions.DBusException as error:
2476
logger.critical("DBusException: %s", error)
2477
cleanup()
859
server_state_changed(server.GetState())
860
except dbus.exceptions.DBusException, error:
861
logger.critical(u"DBusException: %s", error)
2478
862
sys.exit(1)
2479
863
# End of Avahi example code
2480
864
2481
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2482
866
lambda *args, **kwargs:
2483
(tcp_server.handle_request
2484
(*args[2:], **kwargs) or True))
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
2485
869
2486
logger.debug("Starting main loop")
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
2487
872
main_loop.run()
2488
except AvahiError as error:
2489
logger.critical("AvahiError: %s", error)
2490
cleanup()
873
except AvahiError, error:
874
logger.critical(u"AvahiError: %s" + unicode(error))
2491
875
sys.exit(1)
2492
876
except KeyboardInterrupt:
2493
877
if debug:
2494
print("", file=sys.stderr)
2495
logger.debug("Server received KeyboardInterrupt")
2496
logger.debug("Server exiting")
2497
# Must run before the D-Bus bus name gets deregistered
2498
cleanup()
2499
878
print
2500
879
2501
880
if __name__ == '__main__':
2502
881
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0