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- Committer: Teddy Hogeborn
- Date: 2012-01-08 10:19:33 UTC
- Revision ID: teddy@recompile.se-20120108101933-xbtodqgepxax8hn1
Tags: version-1.5.2-1
* Makefile (version): Changed to "1.5.2".
* NEWS (Version 1.5.2): New entry.
* debian/changelog (1.5.2-1): - '' -
* NEWS (Version 1.5.2): New entry.
* debian/changelog (1.5.2-1): - '' -
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files removed:
- network-protocol.txt
- files renamed:
- clients.conf.xml => mandos-clients.conf.xml
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
15
16
#
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
# GNU General Public License for more details.
25
26
#
26
27
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
import SocketServer as socketserver
35
38
import socket
36
import select
37
from optparse import OptionParser
39
import argparse
38
40
import datetime
39
41
import errno
40
42
import gnutls.crypto
43
45
import gnutls.library.functions
44
46
import gnutls.library.constants
45
47
import gnutls.library.types
46
import ConfigParser
48
import ConfigParser as configparser
47
49
import sys
48
50
import re
49
51
import os
50
52
import signal
51
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
58
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
57
68
58
69
import dbus
70
import dbus.service
59
71
import gobject
60
72
import avahi
61
73
from dbus.mainloop.glib import DBusGMainLoop
62
74
import ctypes
63
64
65
logger = logging.Logger('mandos')
66
syslogger = logging.handlers.SysLogHandler\
67
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
68
syslogger.setFormatter(logging.Formatter\
69
('%(levelname)s: %(message)s'))
70
logger.addHandler(syslogger)
71
del syslogger
75
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
79
80
try:
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
except AttributeError:
83
try:
84
from IN import SO_BINDTODEVICE
85
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.5.2"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(debug, level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
72
210
73
211
74
212
class AvahiError(Exception):
75
def __init__(self, value):
213
def __init__(self, value, *args, **kwargs):
76
214
self.value = value
77
def __str__(self):
78
return repr(self.value)
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
79
218
80
219
class AvahiServiceError(AvahiError):
81
220
pass
86
225
87
226
class AvahiService(object):
88
227
"""An Avahi (Zeroconf) service.
228
89
229
Attributes:
90
230
interface: integer; avahi.IF_UNSPEC or an interface index.
91
231
Used to optionally bind to the specified interface.
99
239
max_renames: integer; maximum number of renames
100
240
rename_count: integer; counter so we only rename after collisions
101
241
a sensible number of times
242
group: D-Bus Entry Group
243
server: D-Bus Server
244
bus: dbus.SystemBus()
102
245
"""
103
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
type = None, port = None, TXT = None, domain = "",
105
host = "", max_renames = 12):
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
106
250
self.interface = interface
107
251
self.name = name
108
self.type = type
252
self.type = servicetype
109
253
self.port = port
110
if TXT is None:
111
self.TXT = []
112
else:
113
self.TXT = TXT
254
self.TXT = TXT if TXT is not None else []
114
255
self.domain = domain
115
256
self.host = host
116
257
self.rename_count = 0
258
self.max_renames = max_renames
259
self.protocol = protocol
260
self.group = None # our entry group
261
self.server = None
262
self.bus = bus
263
self.entry_group_state_changed_match = None
117
264
def rename(self):
118
265
"""Derived from the Avahi example code"""
119
266
if self.rename_count >= self.max_renames:
120
logger.critical(u"No suitable service name found after %i"
121
u" retries, exiting.", rename_count)
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
269
self.rename_count)
122
270
raise AvahiServiceError("Too many renames")
123
name = server.GetAlternativeServiceName(name)
124
logger.error(u"Changing name to %r ...", name)
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
274
self.name)
125
275
self.remove()
126
self.add()
276
try:
277
self.add()
278
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
127
282
self.rename_count += 1
128
283
def remove(self):
129
284
"""Derived from the Avahi example code"""
130
if group is not None:
131
group.Reset()
285
if self.entry_group_state_changed_match is not None:
286
self.entry_group_state_changed_match.remove()
287
self.entry_group_state_changed_match = None
288
if self.group is not None:
289
self.group.Reset()
132
290
def add(self):
133
291
"""Derived from the Avahi example code"""
134
global group
135
if group is None:
136
group = dbus.Interface\
137
(bus.get_object(avahi.DBUS_NAME,
138
server.EntryGroupNew()),
139
avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
group.connect_to_signal('StateChanged',
141
entry_group_state_changed)
142
logger.debug(u"Adding service '%s' of type '%s' ...",
143
service.name, service.type)
144
group.AddService(
145
self.interface, # interface
146
avahi.PROTO_INET6, # protocol
147
dbus.UInt32(0), # flags
148
self.name, self.type,
149
self.domain, self.host,
150
dbus.UInt16(self.port),
151
avahi.string_array_to_txt_array(self.TXT))
152
group.Commit()
153
154
# From the Avahi example code:
155
group = None # our entry group
156
# End of Avahi example code
157
158
292
self.remove()
293
if self.group is None:
294
self.group = dbus.Interface(
295
self.bus.get_object(avahi.DBUS_NAME,
296
self.server.EntryGroupNew()),
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
298
self.entry_group_state_changed_match = (
299
self.group.connect_to_signal(
300
'StateChanged', self.entry_group_state_changed))
301
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
302
self.name, self.type)
303
self.group.AddService(
304
self.interface,
305
self.protocol,
306
dbus.UInt32(0), # flags
307
self.name, self.type,
308
self.domain, self.host,
309
dbus.UInt16(self.port),
310
avahi.string_array_to_txt_array(self.TXT))
311
self.group.Commit()
312
def entry_group_state_changed(self, state, error):
313
"""Derived from the Avahi example code"""
314
logger.debug("Avahi entry group state change: %i", state)
315
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
logger.debug("Zeroconf service established.")
318
elif state == avahi.ENTRY_GROUP_COLLISION:
319
logger.info("Zeroconf service name collision.")
320
self.rename()
321
elif state == avahi.ENTRY_GROUP_FAILURE:
322
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
326
def cleanup(self):
327
"""Derived from the Avahi example code"""
328
if self.group is not None:
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
334
self.group = None
335
self.remove()
336
def server_state_changed(self, state, error=None):
337
"""Derived from the Avahi example code"""
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
348
if error is None:
349
logger.error(bad_states[state])
350
else:
351
logger.error(bad_states[state] + ": %r", error)
352
self.cleanup()
353
elif state == avahi.SERVER_RUNNING:
354
self.add()
355
else:
356
if error is None:
357
logger.debug("Unknown state: %r", state)
358
else:
359
logger.debug("Unknown state: %r: %r", state, error)
360
def activate(self):
361
"""Derived from the Avahi example code"""
362
if self.server is None:
363
self.server = dbus.Interface(
364
self.bus.get_object(avahi.DBUS_NAME,
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
367
avahi.DBUS_INTERFACE_SERVER)
368
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
370
self.server_state_changed(self.server.GetState())
371
372
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
380
return ret
381
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
159
388
class Client(object):
160
389
"""A representation of a client host served by this server.
390
161
391
Attributes:
162
name: string; from the config file, used in log messages
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
approval_duration: datetime.timedelta(); Duration of one approval
395
checker: subprocess.Popen(); a running checker process used
396
to see if the client lives.
397
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
if client lives. %() expansions are done at
401
runtime with vars(self) as dict, so that for
402
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
407
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
163
410
fingerprint: string (40 or 32 hexadecimal digits); used to
164
411
uniquely identify the client
165
secret: bytestring; sent verbatim (over TLS) to client
166
fqdn: string (FQDN); available for use by the checker command
167
created: datetime.datetime(); object creation, not client host
168
last_checked_ok: datetime.datetime() or None if not yet checked OK
169
timeout: datetime.timedelta(); How long from last_checked_ok
170
until this client is invalid
171
interval: datetime.timedelta(); How often to start a new checker
172
stop_hook: If set, called by stop() as stop_hook(self)
173
checker: subprocess.Popen(); a running checker process used
174
to see if the client lives.
175
'None' if no process is running.
176
checker_initiator_tag: a gobject event source tag, or None
177
stop_initiator_tag: - '' -
178
checker_callback_tag: - '' -
179
checker_command: string; External command which is run to check if
180
client lives. %() expansions are done at
181
runtime with vars(self) as dict, so that for
182
instance %(name)s can be used in the command.
183
Private attibutes:
184
_timeout: Real variable for 'timeout'
185
_interval: Real variable for 'interval'
186
_timeout_milliseconds: Used when calling gobject.timeout_add()
187
_interval_milliseconds: - '' -
412
host: string; available for use by the checker command
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, or None.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when secret has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
188
429
"""
189
def _set_timeout(self, timeout):
190
"Setter function for 'timeout' attribute"
191
self._timeout = timeout
192
self._timeout_milliseconds = ((self.timeout.days
193
* 24 * 60 * 60 * 1000)
194
+ (self.timeout.seconds * 1000)
195
+ (self.timeout.microseconds
196
// 1000))
197
timeout = property(lambda self: self._timeout,
198
_set_timeout)
199
del _set_timeout
200
def _set_interval(self, interval):
201
"Setter function for 'interval' attribute"
202
self._interval = interval
203
self._interval_milliseconds = ((self.interval.days
204
* 24 * 60 * 60 * 1000)
205
+ (self.interval.seconds
206
* 1000)
207
+ (self.interval.microseconds
208
// 1000))
209
interval = property(lambda self: self._interval,
210
_set_interval)
211
del _set_interval
212
def __init__(self, name = None, stop_hook=None, config={}):
430
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
505
506
return settings
507
508
509
def __init__(self, settings, name = None):
213
510
"""Note: the 'checker' key in 'config' sets the
214
511
'checker_command' attribute and *not* the 'checker'
215
512
attribute."""
216
513
self.name = name
217
logger.debug(u"Creating client %r", self.name)
514
# adding all client settings
515
for setting, value in settings.iteritems():
516
setattr(self, setting, value)
517
518
if self.enabled:
519
if not hasattr(self, "last_enabled"):
520
self.last_enabled = datetime.datetime.utcnow()
521
if not hasattr(self, "expires"):
522
self.expires = (datetime.datetime.utcnow()
523
+ self.timeout)
524
else:
525
self.last_enabled = None
526
self.expires = None
527
528
logger.debug("Creating client %r", self.name)
218
529
# Uppercase and remove spaces from fingerprint for later
219
530
# comparison purposes with return value from the fingerprint()
220
531
# function
221
self.fingerprint = config["fingerprint"].upper()\
222
.replace(u" ", u"")
223
logger.debug(u" Fingerprint: %s", self.fingerprint)
224
if "secret" in config:
225
self.secret = config["secret"].decode(u"base64")
226
elif "secfile" in config:
227
sf = open(config["secfile"])
228
self.secret = sf.read()
229
sf.close()
230
else:
231
raise TypeError(u"No secret or secfile for client %s"
232
% self.name)
233
self.fqdn = config.get("fqdn", "")
234
self.created = datetime.datetime.now()
235
self.last_checked_ok = None
236
self.timeout = string_to_delta(config["timeout"])
237
self.interval = string_to_delta(config["interval"])
238
self.stop_hook = stop_hook
532
logger.debug(" Fingerprint: %s", self.fingerprint)
533
self.created = settings.get("created",
534
datetime.datetime.utcnow())
535
536
# attributes specific for this server instance
239
537
self.checker = None
240
538
self.checker_initiator_tag = None
241
self.stop_initiator_tag = None
539
self.disable_initiator_tag = None
242
540
self.checker_callback_tag = None
243
self.check_command = config["checker"]
244
def start(self):
541
self.current_checker_command = None
542
self.approved = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
556
if not name.startswith("_"):
557
self.client_structure.append(name)
558
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
563
564
def enable(self):
245
565
"""Start this client's checker and timeout hooks"""
566
if getattr(self, "enabled", False):
567
# Already enabled
568
return
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
571
self.enabled = True
572
self.last_enabled = datetime.datetime.utcnow()
573
self.init_checker()
574
575
def disable(self, quiet=True):
576
"""Disable this client."""
577
if not getattr(self, "enabled", False):
578
return False
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
590
self.stop_checker()
591
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
593
return False
594
595
def __del__(self):
596
self.disable()
597
598
def init_checker(self):
246
599
# Schedule a new checker to be started an 'interval' from now,
247
600
# and every interval from then on.
248
self.checker_initiator_tag = gobject.timeout_add\
249
(self._interval_milliseconds,
250
self.start_checker)
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
604
# Schedule a disable() when 'timeout' has passed
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
251
608
# Also start a new checker *right now*.
252
609
self.start_checker()
253
# Schedule a stop() when 'timeout' has passed
254
self.stop_initiator_tag = gobject.timeout_add\
255
(self._timeout_milliseconds,
256
self.stop)
257
def stop(self):
258
"""Stop this client.
259
The possibility that a client might be restarted is left open,
260
but not currently used."""
261
# If this client doesn't have a secret, it is already stopped.
262
if self.secret:
263
logger.info(u"Stopping client %s", self.name)
264
self.secret = None
265
else:
266
return False
267
if getattr(self, "stop_initiator_tag", False):
268
gobject.source_remove(self.stop_initiator_tag)
269
self.stop_initiator_tag = None
270
if getattr(self, "checker_initiator_tag", False):
271
gobject.source_remove(self.checker_initiator_tag)
272
self.checker_initiator_tag = None
273
self.stop_checker()
274
if self.stop_hook:
275
self.stop_hook(self)
276
# Do not run this again if called by a gobject.timeout_add
277
return False
278
def __del__(self):
279
self.stop_hook = None
280
self.stop()
281
def checker_callback(self, pid, condition):
610
611
def checker_callback(self, pid, condition, command):
282
612
"""The checker has completed, so take appropriate actions."""
283
now = datetime.datetime.now()
284
613
self.checker_callback_tag = None
285
614
self.checker = None
286
if os.WIFEXITED(condition) \
287
and (os.WEXITSTATUS(condition) == 0):
288
logger.info(u"Checker for %(name)s succeeded",
289
vars(self))
290
self.last_checked_ok = now
291
gobject.source_remove(self.stop_initiator_tag)
292
self.stop_initiator_tag = gobject.timeout_add\
293
(self._timeout_milliseconds,
294
self.stop)
295
elif not os.WIFEXITED(condition):
296
logger.warning(u"Checker for %(name)s crashed?",
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
617
if self.last_checker_status == 0:
618
logger.info("Checker for %(name)s succeeded",
619
vars(self))
620
self.checked_ok()
621
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
624
else:
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
297
627
vars(self))
298
else:
299
logger.info(u"Checker for %(name)s failed",
300
vars(self))
628
629
def checked_ok(self, timeout=None):
630
"""Bump up the timeout for this client.
631
632
This should only be called when the client has been seen,
633
alive and well.
634
"""
635
if timeout is None:
636
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
638
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
640
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
644
self.expires = datetime.datetime.utcnow() + timeout
645
646
def need_approval(self):
647
self.last_approval_request = datetime.datetime.utcnow()
648
301
649
def start_checker(self):
302
650
"""Start a new checker subprocess if one is not running.
651
303
652
If a checker already exists, leave it running and do
304
653
nothing."""
305
654
# The reason for not killing a running checker is that if we
308
657
# client would inevitably timeout, since no checker would get
309
658
# a chance to run to completion. If we instead leave running
310
659
# checkers alone, the checker would have to take more time
311
# than 'timeout' for the client to be declared invalid, which
312
# is as it should be.
660
# than 'timeout' for the client to be disabled, which is as it
661
# should be.
662
663
# If a checker exists, make sure it is not a zombie
664
try:
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
671
if pid:
672
logger.warning("Checker was a zombie")
673
gobject.source_remove(self.checker_callback_tag)
674
self.checker_callback(pid, status,
675
self.current_checker_command)
676
# Start a new checker if needed
313
677
if self.checker is None:
314
678
try:
315
# In case check_command has exactly one % operator
316
command = self.check_command % self.fqdn
679
# In case checker_command has exactly one % operator
680
command = self.checker_command % self.host
317
681
except TypeError:
318
682
# Escape attributes for the shell
319
escaped_attrs = dict((key, re.escape(str(val)))
320
for key, val in
321
vars(self).iteritems())
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
322
691
try:
323
command = self.check_command % escaped_attrs
324
except TypeError, error:
325
logger.error(u'Could not format string "%s":'
326
u' %s', self.check_command, error)
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
327
696
return True # Try again later
697
self.current_checker_command = command
328
698
try:
329
logger.info(u"Starting checker %r for %s",
699
logger.info("Starting checker %r for %s",
330
700
command, self.name)
701
# We don't need to redirect stdout and stderr, since
702
# in normal mode, that is already done by daemon(),
703
# and in debug mode we don't want to. (Stdin is
704
# always replaced by /dev/null.)
331
705
self.checker = subprocess.Popen(command,
332
706
close_fds=True,
333
707
shell=True, cwd="/")
334
self.checker_callback_tag = gobject.child_watch_add\
335
(self.checker.pid,
336
self.checker_callback)
337
except subprocess.OSError, error:
338
logger.error(u"Failed to start subprocess: %s",
708
self.checker_callback_tag = (gobject.child_watch_add
709
(self.checker.pid,
710
self.checker_callback,
711
data=command))
712
# The checker may have completed before the gobject
713
# watch was added. Check for this.
714
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
715
if pid:
716
gobject.source_remove(self.checker_callback_tag)
717
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
339
720
error)
340
721
# Re-run this periodically if run by gobject.timeout_add
341
722
return True
723
342
724
def stop_checker(self):
343
725
"""Force the checker process, if any, to stop."""
344
726
if self.checker_callback_tag:
349
731
logger.debug("Stopping checker for %(name)s", vars(self))
350
732
try:
351
733
os.kill(self.checker.pid, signal.SIGTERM)
352
#os.sleep(0.5)
734
#time.sleep(0.5)
353
735
#if self.checker.poll() is None:
354
736
# os.kill(self.checker.pid, signal.SIGKILL)
355
except OSError, error:
737
except OSError as error:
356
738
if error.errno != errno.ESRCH: # No such process
357
739
raise
358
740
self.checker = None
359
def still_valid(self):
360
"""Has the timeout not yet passed for this client?"""
361
now = datetime.datetime.now()
362
if self.last_checked_ok is None:
363
return now < (self.created + self.timeout)
364
else:
365
return now < (self.last_checked_ok + self.timeout)
366
367
368
def peer_certificate(session):
369
"Return the peer's OpenPGP certificate as a bytestring"
370
# If not an OpenPGP certificate...
371
if gnutls.library.functions.gnutls_certificate_type_get\
372
(session._c_object) \
373
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
374
# ...do the normal thing
375
return session.peer_certificate
376
list_size = ctypes.c_uint()
377
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
378
(session._c_object, ctypes.byref(list_size))
379
if list_size.value == 0:
380
return None
381
cert = cert_list[0]
382
return ctypes.string_at(cert.data, cert.size)
383
384
385
def fingerprint(openpgp):
386
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
# New GnuTLS "datum" with the OpenPGP public key
388
datum = gnutls.library.types.gnutls_datum_t\
389
(ctypes.cast(ctypes.c_char_p(openpgp),
390
ctypes.POINTER(ctypes.c_ubyte)),
391
ctypes.c_uint(len(openpgp)))
392
# New empty GnuTLS certificate
393
crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
gnutls.library.functions.gnutls_openpgp_crt_init\
395
(ctypes.byref(crt))
396
# Import the OpenPGP public key into the certificate
397
gnutls.library.functions.gnutls_openpgp_crt_import\
398
(crt, ctypes.byref(datum),
399
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
400
# New buffer for the fingerprint
401
buffer = ctypes.create_string_buffer(20)
402
buffer_length = ctypes.c_size_t()
403
# Get the fingerprint from the certificate into the buffer
404
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
406
# Deinit the certificate
407
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
# Convert the buffer to a Python bytestring
409
fpr = ctypes.string_at(buffer, buffer_length.value)
410
# Convert the bytestring to hexadecimal notation
411
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
return hex_fpr
413
414
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
416
"""A TCP request handler class.
417
Instantiated by IPv6_TCPServer for each request to handle it.
741
742
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
745
"""Decorators for marking methods of a DBusObjectWithProperties to
746
become properties on the D-Bus.
747
748
The decorated method will be called with no arguments by "Get"
749
and with one argument by "Set".
750
751
The parameters, where they are supported, are the same as
752
dbus.service.method, except there is only "signature", since the
753
type from Get() and the type sent to Set() is the same.
754
"""
755
# Encoding deeply encoded byte arrays is not supported yet by the
756
# "Set" method, so we fail early here:
757
if byte_arrays and signature != "ay":
758
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
760
def decorator(func):
761
func._dbus_is_property = True
762
func._dbus_interface = dbus_interface
763
func._dbus_signature = signature
764
func._dbus_access = access
765
func._dbus_name = func.__name__
766
if func._dbus_name.endswith("_dbus_property"):
767
func._dbus_name = func._dbus_name[:-14]
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
return func
770
return decorator
771
772
773
class DBusPropertyException(dbus.exceptions.DBusException):
774
"""A base class for D-Bus property-related exceptions
775
"""
776
def __unicode__(self):
777
return unicode(str(self))
778
779
780
class DBusPropertyAccessException(DBusPropertyException):
781
"""A property's access permissions disallows an operation.
782
"""
783
pass
784
785
786
class DBusPropertyNotFound(DBusPropertyException):
787
"""An attempt was made to access a non-existing property.
788
"""
789
pass
790
791
792
class DBusObjectWithProperties(dbus.service.Object):
793
"""A D-Bus object with properties.
794
795
Classes inheriting from this can use the dbus_service_property
796
decorator to expose methods as D-Bus properties. It exposes the
797
standard Get(), Set(), and GetAll() methods on the D-Bus.
798
"""
799
800
@staticmethod
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
803
804
def _get_all_dbus_properties(self):
805
"""Returns a generator of (name, attribute) pairs
806
"""
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
811
812
def _get_dbus_property(self, interface_name, property_name):
813
"""Returns a bound method if one exists which is a D-Bus
814
property with the specified name and interface.
815
"""
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
819
if (value._dbus_name == property_name
820
and value._dbus_interface == interface_name):
821
return value.__get__(self)
822
823
# No such property
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
827
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
829
out_signature="v")
830
def Get(self, interface_name, property_name):
831
"""Standard D-Bus property Get() method, see D-Bus standard.
832
"""
833
prop = self._get_dbus_property(interface_name, property_name)
834
if prop._dbus_access == "write":
835
raise DBusPropertyAccessException(property_name)
836
value = prop()
837
if not hasattr(value, "variant_level"):
838
return value
839
return type(value)(value, variant_level=value.variant_level+1)
840
841
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
842
def Set(self, interface_name, property_name, value):
843
"""Standard D-Bus property Set() method, see D-Bus standard.
844
"""
845
prop = self._get_dbus_property(interface_name, property_name)
846
if prop._dbus_access == "read":
847
raise DBusPropertyAccessException(property_name)
848
if prop._dbus_get_args_options["byte_arrays"]:
849
# The byte_arrays option is not supported yet on
850
# signatures other than "ay".
851
if prop._dbus_signature != "ay":
852
raise ValueError
853
value = dbus.ByteArray(b''.join(chr(byte)
854
for byte in value))
855
prop(value)
856
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
858
out_signature="a{sv}")
859
def GetAll(self, interface_name):
860
"""Standard D-Bus property GetAll() method, see D-Bus
861
standard.
862
863
Note: Will not include properties with access="write".
864
"""
865
properties = {}
866
for name, prop in self._get_all_dbus_properties():
867
if (interface_name
868
and interface_name != prop._dbus_interface):
869
# Interface non-empty but did not match
870
continue
871
# Ignore write-only properties
872
if prop._dbus_access == "write":
873
continue
874
value = prop()
875
if not hasattr(value, "variant_level"):
876
properties[name] = value
877
continue
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
880
return dbus.Dictionary(properties, signature="sv")
881
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
883
out_signature="s",
884
path_keyword='object_path',
885
connection_keyword='connection')
886
def Introspect(self, object_path, connection):
887
"""Standard D-Bus method, overloaded to insert property tags.
888
"""
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
891
try:
892
document = xml.dom.minidom.parseString(xmlstring)
893
def make_tag(document, name, prop):
894
e = document.createElement("property")
895
e.setAttribute("name", name)
896
e.setAttribute("type", prop._dbus_signature)
897
e.setAttribute("access", prop._dbus_access)
898
return e
899
for if_tag in document.getElementsByTagName("interface"):
900
for tag in (make_tag(document, name, prop)
901
for name, prop
902
in self._get_all_dbus_properties()
903
if prop._dbus_interface
904
== if_tag.getAttribute("name")):
905
if_tag.appendChild(tag)
906
# Add the names to the return values for the
907
# "org.freedesktop.DBus.Properties" methods
908
if (if_tag.getAttribute("name")
909
== "org.freedesktop.DBus.Properties"):
910
for cn in if_tag.getElementsByTagName("method"):
911
if cn.getAttribute("name") == "Get":
912
for arg in cn.getElementsByTagName("arg"):
913
if (arg.getAttribute("direction")
914
== "out"):
915
arg.setAttribute("name", "value")
916
elif cn.getAttribute("name") == "GetAll":
917
for arg in cn.getElementsByTagName("arg"):
918
if (arg.getAttribute("direction")
919
== "out"):
920
arg.setAttribute("name", "props")
921
xmlstring = document.toxml("utf-8")
922
document.unlink()
923
except (AttributeError, xml.dom.DOMException,
924
xml.parsers.expat.ExpatError) as error:
925
logger.error("Failed to override Introspection method",
926
error)
927
return xmlstring
928
929
930
def datetime_to_dbus (dt, variant_level=0):
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
if dt is None:
933
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
942
"""
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
950
# Ignore non-D-Bus attributes, and D-Bus attributes
951
# with the wrong interface name
952
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
955
continue
956
# Create an alternate D-Bus interface name based on
957
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
961
# Is this a D-Bus signal?
962
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
966
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
969
# Create a new, but exactly alike, function
970
# object, and decorate it to be a new D-Bus signal
971
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
981
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
984
def fixscope(func1, func2):
985
"""This function is a scope container to pass
986
func1 and func2 to the "call_both" function
987
outside of its arguments"""
988
def call_both(*args, **kwargs):
989
"""This function will emit two D-Bus
990
signals by calling func1 and func2"""
991
func1(*args, **kwargs)
992
func2(*args, **kwargs)
993
return call_both
994
# Create the "call_both" function and add it to
995
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
998
# Is this a D-Bus method?
999
elif getattr(attribute, "_dbus_is_method", False):
1000
# Create a new, but exactly alike, function
1001
# object. Decorate it to be a new D-Bus method
1002
# with the alternate D-Bus interface name. Add it
1003
# to the class.
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1014
# Is this a D-Bus property?
1015
elif getattr(attribute, "_dbus_is_property", False):
1016
# Create a new, but exactly alike, function
1017
# object, and decorate it to be a new D-Bus
1018
# property with the alternate D-Bus interface
1019
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
1036
class ClientDBus(Client, DBusObjectWithProperties):
1037
"""A Client class using D-Bus
1038
1039
Attributes:
1040
dbus_object_path: dbus.ObjectPath
1041
bus: dbus.SystemBus()
1042
"""
1043
1044
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
1047
# dbus.service.Object doesn't use super(), so we can't either.
1048
1049
def __init__(self, bus = None, *args, **kwargs):
1050
self.bus = bus
1051
Client.__init__(self, *args, **kwargs)
1052
# Only now, when this client is initialized, can it show up on
1053
# the D-Bus
1054
client_object_name = unicode(self.name).translate(
1055
{ord("."): ord("_"),
1056
ord("-"): ord("_")})
1057
self.dbus_object_path = (dbus.ObjectPath
1058
("/clients/" + client_object_name))
1059
DBusObjectWithProperties.__init__(self, self.bus,
1060
self.dbus_object_path)
1061
1062
def notifychangeproperty(transform_func,
1063
dbus_name, type_func=lambda x: x,
1064
variant_level=1):
1065
""" Modify a variable so that it's a property which announces
1066
its changes to DBus.
1067
1068
transform_fun: Function that takes a value and a variant_level
1069
and transforms it to a D-Bus type.
1070
dbus_name: D-Bus name of the variable
1071
type_func: Function that transform the value before sending it
1072
to the D-Bus. Default: no transform
1073
variant_level: D-Bus variant level. Default: 1
1074
"""
1075
attrname = "_{0}".format(dbus_name)
1076
def setter(self, value):
1077
if hasattr(self, "dbus_object_path"):
1078
if (not hasattr(self, attrname) or
1079
type_func(getattr(self, attrname, None))
1080
!= type_func(value)):
1081
dbus_value = transform_func(type_func(value),
1082
variant_level
1083
=variant_level)
1084
self.PropertyChanged(dbus.String(dbus_name),
1085
dbus_value)
1086
setattr(self, attrname, value)
1087
1088
return property(lambda self: getattr(self, attrname), setter)
1089
1090
1091
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1092
approvals_pending = notifychangeproperty(dbus.Boolean,
1093
"ApprovalPending",
1094
type_func = bool)
1095
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1096
last_enabled = notifychangeproperty(datetime_to_dbus,
1097
"LastEnabled")
1098
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1099
type_func = lambda checker:
1100
checker is not None)
1101
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1102
"LastCheckedOK")
1103
last_approval_request = notifychangeproperty(
1104
datetime_to_dbus, "LastApprovalRequest")
1105
approved_by_default = notifychangeproperty(dbus.Boolean,
1106
"ApprovedByDefault")
1107
approval_delay = notifychangeproperty(dbus.UInt64,
1108
"ApprovalDelay",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
approval_duration = notifychangeproperty(
1112
dbus.UInt64, "ApprovalDuration",
1113
type_func = timedelta_to_milliseconds)
1114
host = notifychangeproperty(dbus.String, "Host")
1115
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
extended_timeout = notifychangeproperty(
1119
dbus.UInt64, "ExtendedTimeout",
1120
type_func = timedelta_to_milliseconds)
1121
interval = notifychangeproperty(dbus.UInt64,
1122
"Interval",
1123
type_func =
1124
timedelta_to_milliseconds)
1125
checker_command = notifychangeproperty(dbus.String, "Checker")
1126
1127
del notifychangeproperty
1128
1129
def __del__(self, *args, **kwargs):
1130
try:
1131
self.remove_from_connection()
1132
except LookupError:
1133
pass
1134
if hasattr(DBusObjectWithProperties, "__del__"):
1135
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1136
Client.__del__(self, *args, **kwargs)
1137
1138
def checker_callback(self, pid, condition, command,
1139
*args, **kwargs):
1140
self.checker_callback_tag = None
1141
self.checker = None
1142
if os.WIFEXITED(condition):
1143
exitstatus = os.WEXITSTATUS(condition)
1144
# Emit D-Bus signal
1145
self.CheckerCompleted(dbus.Int16(exitstatus),
1146
dbus.Int64(condition),
1147
dbus.String(command))
1148
else:
1149
# Emit D-Bus signal
1150
self.CheckerCompleted(dbus.Int16(-1),
1151
dbus.Int64(condition),
1152
dbus.String(command))
1153
1154
return Client.checker_callback(self, pid, condition, command,
1155
*args, **kwargs)
1156
1157
def start_checker(self, *args, **kwargs):
1158
old_checker = self.checker
1159
if self.checker is not None:
1160
old_checker_pid = self.checker.pid
1161
else:
1162
old_checker_pid = None
1163
r = Client.start_checker(self, *args, **kwargs)
1164
# Only if new checker process was started
1165
if (self.checker is not None
1166
and old_checker_pid != self.checker.pid):
1167
# Emit D-Bus signal
1168
self.CheckerStarted(self.current_checker_command)
1169
return r
1170
1171
def _reset_approved(self):
1172
self.approved = None
1173
return False
1174
1175
def approve(self, value=True):
1176
self.send_changedstate()
1177
self.approved = value
1178
gobject.timeout_add(timedelta_to_milliseconds
1179
(self.approval_duration),
1180
self._reset_approved)
1181
1182
1183
## D-Bus methods, signals & properties
1184
_interface = "se.recompile.Mandos.Client"
1185
1186
## Signals
1187
1188
# CheckerCompleted - signal
1189
@dbus.service.signal(_interface, signature="nxs")
1190
def CheckerCompleted(self, exitcode, waitstatus, command):
1191
"D-Bus signal"
1192
pass
1193
1194
# CheckerStarted - signal
1195
@dbus.service.signal(_interface, signature="s")
1196
def CheckerStarted(self, command):
1197
"D-Bus signal"
1198
pass
1199
1200
# PropertyChanged - signal
1201
@dbus.service.signal(_interface, signature="sv")
1202
def PropertyChanged(self, property, value):
1203
"D-Bus signal"
1204
pass
1205
1206
# GotSecret - signal
1207
@dbus.service.signal(_interface)
1208
def GotSecret(self):
1209
"""D-Bus signal
1210
Is sent after a successful transfer of secret from the Mandos
1211
server to mandos-client
1212
"""
1213
pass
1214
1215
# Rejected - signal
1216
@dbus.service.signal(_interface, signature="s")
1217
def Rejected(self, reason):
1218
"D-Bus signal"
1219
pass
1220
1221
# NeedApproval - signal
1222
@dbus.service.signal(_interface, signature="tb")
1223
def NeedApproval(self, timeout, default):
1224
"D-Bus signal"
1225
return self.need_approval()
1226
1227
## Methods
1228
1229
# Approve - method
1230
@dbus.service.method(_interface, in_signature="b")
1231
def Approve(self, value):
1232
self.approve(value)
1233
1234
# CheckedOK - method
1235
@dbus.service.method(_interface)
1236
def CheckedOK(self):
1237
self.checked_ok()
1238
1239
# Enable - method
1240
@dbus.service.method(_interface)
1241
def Enable(self):
1242
"D-Bus method"
1243
self.enable()
1244
1245
# StartChecker - method
1246
@dbus.service.method(_interface)
1247
def StartChecker(self):
1248
"D-Bus method"
1249
self.start_checker()
1250
1251
# Disable - method
1252
@dbus.service.method(_interface)
1253
def Disable(self):
1254
"D-Bus method"
1255
self.disable()
1256
1257
# StopChecker - method
1258
@dbus.service.method(_interface)
1259
def StopChecker(self):
1260
self.stop_checker()
1261
1262
## Properties
1263
1264
# ApprovalPending - property
1265
@dbus_service_property(_interface, signature="b", access="read")
1266
def ApprovalPending_dbus_property(self):
1267
return dbus.Boolean(bool(self.approvals_pending))
1268
1269
# ApprovedByDefault - property
1270
@dbus_service_property(_interface, signature="b",
1271
access="readwrite")
1272
def ApprovedByDefault_dbus_property(self, value=None):
1273
if value is None: # get
1274
return dbus.Boolean(self.approved_by_default)
1275
self.approved_by_default = bool(value)
1276
1277
# ApprovalDelay - property
1278
@dbus_service_property(_interface, signature="t",
1279
access="readwrite")
1280
def ApprovalDelay_dbus_property(self, value=None):
1281
if value is None: # get
1282
return dbus.UInt64(self.approval_delay_milliseconds())
1283
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1284
1285
# ApprovalDuration - property
1286
@dbus_service_property(_interface, signature="t",
1287
access="readwrite")
1288
def ApprovalDuration_dbus_property(self, value=None):
1289
if value is None: # get
1290
return dbus.UInt64(timedelta_to_milliseconds(
1291
self.approval_duration))
1292
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1293
1294
# Name - property
1295
@dbus_service_property(_interface, signature="s", access="read")
1296
def Name_dbus_property(self):
1297
return dbus.String(self.name)
1298
1299
# Fingerprint - property
1300
@dbus_service_property(_interface, signature="s", access="read")
1301
def Fingerprint_dbus_property(self):
1302
return dbus.String(self.fingerprint)
1303
1304
# Host - property
1305
@dbus_service_property(_interface, signature="s",
1306
access="readwrite")
1307
def Host_dbus_property(self, value=None):
1308
if value is None: # get
1309
return dbus.String(self.host)
1310
self.host = unicode(value)
1311
1312
# Created - property
1313
@dbus_service_property(_interface, signature="s", access="read")
1314
def Created_dbus_property(self):
1315
return datetime_to_dbus(self.created)
1316
1317
# LastEnabled - property
1318
@dbus_service_property(_interface, signature="s", access="read")
1319
def LastEnabled_dbus_property(self):
1320
return datetime_to_dbus(self.last_enabled)
1321
1322
# Enabled - property
1323
@dbus_service_property(_interface, signature="b",
1324
access="readwrite")
1325
def Enabled_dbus_property(self, value=None):
1326
if value is None: # get
1327
return dbus.Boolean(self.enabled)
1328
if value:
1329
self.enable()
1330
else:
1331
self.disable()
1332
1333
# LastCheckedOK - property
1334
@dbus_service_property(_interface, signature="s",
1335
access="readwrite")
1336
def LastCheckedOK_dbus_property(self, value=None):
1337
if value is not None:
1338
self.checked_ok()
1339
return
1340
return datetime_to_dbus(self.last_checked_ok)
1341
1342
# Expires - property
1343
@dbus_service_property(_interface, signature="s", access="read")
1344
def Expires_dbus_property(self):
1345
return datetime_to_dbus(self.expires)
1346
1347
# LastApprovalRequest - property
1348
@dbus_service_property(_interface, signature="s", access="read")
1349
def LastApprovalRequest_dbus_property(self):
1350
return datetime_to_dbus(self.last_approval_request)
1351
1352
# Timeout - property
1353
@dbus_service_property(_interface, signature="t",
1354
access="readwrite")
1355
def Timeout_dbus_property(self, value=None):
1356
if value is None: # get
1357
return dbus.UInt64(self.timeout_milliseconds())
1358
self.timeout = datetime.timedelta(0, 0, 0, value)
1359
# Reschedule timeout
1360
if self.enabled:
1361
now = datetime.datetime.utcnow()
1362
time_to_die = timedelta_to_milliseconds(
1363
(self.last_checked_ok + self.timeout) - now)
1364
if time_to_die <= 0:
1365
# The timeout has passed
1366
self.disable()
1367
else:
1368
self.expires = (now +
1369
datetime.timedelta(milliseconds =
1370
time_to_die))
1371
if (getattr(self, "disable_initiator_tag", None)
1372
is None):
1373
return
1374
gobject.source_remove(self.disable_initiator_tag)
1375
self.disable_initiator_tag = (gobject.timeout_add
1376
(time_to_die,
1377
self.disable))
1378
1379
# ExtendedTimeout - property
1380
@dbus_service_property(_interface, signature="t",
1381
access="readwrite")
1382
def ExtendedTimeout_dbus_property(self, value=None):
1383
if value is None: # get
1384
return dbus.UInt64(self.extended_timeout_milliseconds())
1385
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1386
1387
# Interval - property
1388
@dbus_service_property(_interface, signature="t",
1389
access="readwrite")
1390
def Interval_dbus_property(self, value=None):
1391
if value is None: # get
1392
return dbus.UInt64(self.interval_milliseconds())
1393
self.interval = datetime.timedelta(0, 0, 0, value)
1394
if getattr(self, "checker_initiator_tag", None) is None:
1395
return
1396
if self.enabled:
1397
# Reschedule checker run
1398
gobject.source_remove(self.checker_initiator_tag)
1399
self.checker_initiator_tag = (gobject.timeout_add
1400
(value, self.start_checker))
1401
self.start_checker() # Start one now, too
1402
1403
# Checker - property
1404
@dbus_service_property(_interface, signature="s",
1405
access="readwrite")
1406
def Checker_dbus_property(self, value=None):
1407
if value is None: # get
1408
return dbus.String(self.checker_command)
1409
self.checker_command = unicode(value)
1410
1411
# CheckerRunning - property
1412
@dbus_service_property(_interface, signature="b",
1413
access="readwrite")
1414
def CheckerRunning_dbus_property(self, value=None):
1415
if value is None: # get
1416
return dbus.Boolean(self.checker is not None)
1417
if value:
1418
self.start_checker()
1419
else:
1420
self.stop_checker()
1421
1422
# ObjectPath - property
1423
@dbus_service_property(_interface, signature="o", access="read")
1424
def ObjectPath_dbus_property(self):
1425
return self.dbus_object_path # is already a dbus.ObjectPath
1426
1427
# Secret = property
1428
@dbus_service_property(_interface, signature="ay",
1429
access="write", byte_arrays=True)
1430
def Secret_dbus_property(self, value):
1431
self.secret = str(value)
1432
1433
del _interface
1434
1435
1436
class ProxyClient(object):
1437
def __init__(self, child_pipe, fpr, address):
1438
self._pipe = child_pipe
1439
self._pipe.send(('init', fpr, address))
1440
if not self._pipe.recv():
1441
raise KeyError()
1442
1443
def __getattribute__(self, name):
1444
if name == '_pipe':
1445
return super(ProxyClient, self).__getattribute__(name)
1446
self._pipe.send(('getattr', name))
1447
data = self._pipe.recv()
1448
if data[0] == 'data':
1449
return data[1]
1450
if data[0] == 'function':
1451
def func(*args, **kwargs):
1452
self._pipe.send(('funcall', name, args, kwargs))
1453
return self._pipe.recv()[1]
1454
return func
1455
1456
def __setattr__(self, name, value):
1457
if name == '_pipe':
1458
return super(ProxyClient, self).__setattr__(name, value)
1459
self._pipe.send(('setattr', name, value))
1460
1461
1462
class ClientDBusTransitional(ClientDBus):
1463
__metaclass__ = AlternateDBusNamesMetaclass
1464
1465
1466
class ClientHandler(socketserver.BaseRequestHandler, object):
1467
"""A class to handle client connections.
1468
1469
Instantiated once for each connection to handle it.
418
1470
Note: This will run in its own forked process."""
419
1471
420
1472
def handle(self):
421
logger.info(u"TCP connection from: %s",
422
unicode(self.client_address))
423
session = gnutls.connection.ClientSession\
424
(self.request, gnutls.connection.X509Credentials())
425
426
line = self.request.makefile().readline()
427
logger.debug(u"Protocol version: %r", line)
428
try:
429
if int(line.strip().split()[0]) > 1:
430
raise RuntimeError
431
except (ValueError, IndexError, RuntimeError), error:
432
logger.error(u"Unknown protocol version: %s", error)
433
return
434
435
# Note: gnutls.connection.X509Credentials is really a generic
436
# GnuTLS certificate credentials object so long as no X.509
437
# keys are added to it. Therefore, we can use it here despite
438
# using OpenPGP certificates.
439
440
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
442
# "+DHE-DSS"))
443
priority = "NORMAL" # Fallback default, since this
444
# MUST be set.
445
if self.server.settings["priority"]:
446
priority = self.server.settings["priority"]
447
gnutls.library.functions.gnutls_priority_set_direct\
448
(session._c_object, priority, None);
449
450
try:
451
session.handshake()
452
except gnutls.errors.GNUTLSError, error:
453
logger.warning(u"Handshake failed: %s", error)
454
# Do not run session.bye() here: the session is not
455
# established. Just abandon the request.
456
return
457
try:
458
fpr = fingerprint(peer_certificate(session))
459
except (TypeError, gnutls.errors.GNUTLSError), error:
460
logger.warning(u"Bad certificate: %s", error)
461
session.bye()
462
return
463
logger.debug(u"Fingerprint: %s", fpr)
464
client = None
465
for c in self.server.clients:
466
if c.fingerprint == fpr:
467
client = c
468
break
469
if not client:
470
logger.warning(u"Client not found for fingerprint: %s",
471
fpr)
472
session.bye()
473
return
474
# Have to check if client.still_valid(), since it is possible
475
# that the client timed out while establishing the GnuTLS
476
# session.
477
if not client.still_valid():
478
logger.warning(u"Client %(name)s is invalid",
479
vars(client))
480
session.bye()
481
return
482
sent_size = 0
483
while sent_size < len(client.secret):
484
sent = session.send(client.secret[sent_size:])
485
logger.debug(u"Sent: %d, remaining: %d",
486
sent, len(client.secret)
487
- (sent_size + sent))
488
sent_size += sent
489
session.bye()
490
491
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
493
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1473
with contextlib.closing(self.server.child_pipe) as child_pipe:
1474
logger.info("TCP connection from: %s",
1475
unicode(self.client_address))
1476
logger.debug("Pipe FD: %d",
1477
self.server.child_pipe.fileno())
1478
1479
session = (gnutls.connection
1480
.ClientSession(self.request,
1481
gnutls.connection
1482
.X509Credentials()))
1483
1484
# Note: gnutls.connection.X509Credentials is really a
1485
# generic GnuTLS certificate credentials object so long as
1486
# no X.509 keys are added to it. Therefore, we can use it
1487
# here despite using OpenPGP certificates.
1488
1489
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1490
# "+AES-256-CBC", "+SHA1",
1491
# "+COMP-NULL", "+CTYPE-OPENPGP",
1492
# "+DHE-DSS"))
1493
# Use a fallback default, since this MUST be set.
1494
priority = self.server.gnutls_priority
1495
if priority is None:
1496
priority = "NORMAL"
1497
(gnutls.library.functions
1498
.gnutls_priority_set_direct(session._c_object,
1499
priority, None))
1500
1501
# Start communication using the Mandos protocol
1502
# Get protocol number
1503
line = self.request.makefile().readline()
1504
logger.debug("Protocol version: %r", line)
1505
try:
1506
if int(line.strip().split()[0]) > 1:
1507
raise RuntimeError
1508
except (ValueError, IndexError, RuntimeError) as error:
1509
logger.error("Unknown protocol version: %s", error)
1510
return
1511
1512
# Start GnuTLS connection
1513
try:
1514
session.handshake()
1515
except gnutls.errors.GNUTLSError as error:
1516
logger.warning("Handshake failed: %s", error)
1517
# Do not run session.bye() here: the session is not
1518
# established. Just abandon the request.
1519
return
1520
logger.debug("Handshake succeeded")
1521
1522
approval_required = False
1523
try:
1524
try:
1525
fpr = self.fingerprint(self.peer_certificate
1526
(session))
1527
except (TypeError,
1528
gnutls.errors.GNUTLSError) as error:
1529
logger.warning("Bad certificate: %s", error)
1530
return
1531
logger.debug("Fingerprint: %s", fpr)
1532
1533
try:
1534
client = ProxyClient(child_pipe, fpr,
1535
self.client_address)
1536
except KeyError:
1537
return
1538
1539
if client.approval_delay:
1540
delay = client.approval_delay
1541
client.approvals_pending += 1
1542
approval_required = True
1543
1544
while True:
1545
if not client.enabled:
1546
logger.info("Client %s is disabled",
1547
client.name)
1548
if self.server.use_dbus:
1549
# Emit D-Bus signal
1550
client.Rejected("Disabled")
1551
return
1552
1553
if client.approved or not client.approval_delay:
1554
#We are approved or approval is disabled
1555
break
1556
elif client.approved is None:
1557
logger.info("Client %s needs approval",
1558
client.name)
1559
if self.server.use_dbus:
1560
# Emit D-Bus signal
1561
client.NeedApproval(
1562
client.approval_delay_milliseconds(),
1563
client.approved_by_default)
1564
else:
1565
logger.warning("Client %s was not approved",
1566
client.name)
1567
if self.server.use_dbus:
1568
# Emit D-Bus signal
1569
client.Rejected("Denied")
1570
return
1571
1572
#wait until timeout or approved
1573
time = datetime.datetime.now()
1574
client.changedstate.acquire()
1575
(client.changedstate.wait
1576
(float(client.timedelta_to_milliseconds(delay)
1577
/ 1000)))
1578
client.changedstate.release()
1579
time2 = datetime.datetime.now()
1580
if (time2 - time) >= delay:
1581
if not client.approved_by_default:
1582
logger.warning("Client %s timed out while"
1583
" waiting for approval",
1584
client.name)
1585
if self.server.use_dbus:
1586
# Emit D-Bus signal
1587
client.Rejected("Approval timed out")
1588
return
1589
else:
1590
break
1591
else:
1592
delay -= time2 - time
1593
1594
sent_size = 0
1595
while sent_size < len(client.secret):
1596
try:
1597
sent = session.send(client.secret[sent_size:])
1598
except gnutls.errors.GNUTLSError as error:
1599
logger.warning("gnutls send failed")
1600
return
1601
logger.debug("Sent: %d, remaining: %d",
1602
sent, len(client.secret)
1603
- (sent_size + sent))
1604
sent_size += sent
1605
1606
logger.info("Sending secret to %s", client.name)
1607
# bump the timeout using extended_timeout
1608
client.checked_ok(client.extended_timeout)
1609
if self.server.use_dbus:
1610
# Emit D-Bus signal
1611
client.GotSecret()
1612
1613
finally:
1614
if approval_required:
1615
client.approvals_pending -= 1
1616
try:
1617
session.bye()
1618
except gnutls.errors.GNUTLSError as error:
1619
logger.warning("GnuTLS bye failed")
1620
1621
@staticmethod
1622
def peer_certificate(session):
1623
"Return the peer's OpenPGP certificate as a bytestring"
1624
# If not an OpenPGP certificate...
1625
if (gnutls.library.functions
1626
.gnutls_certificate_type_get(session._c_object)
1627
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1628
# ...do the normal thing
1629
return session.peer_certificate
1630
list_size = ctypes.c_uint(1)
1631
cert_list = (gnutls.library.functions
1632
.gnutls_certificate_get_peers
1633
(session._c_object, ctypes.byref(list_size)))
1634
if not bool(cert_list) and list_size.value != 0:
1635
raise gnutls.errors.GNUTLSError("error getting peer"
1636
" certificate")
1637
if list_size.value == 0:
1638
return None
1639
cert = cert_list[0]
1640
return ctypes.string_at(cert.data, cert.size)
1641
1642
@staticmethod
1643
def fingerprint(openpgp):
1644
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1645
# New GnuTLS "datum" with the OpenPGP public key
1646
datum = (gnutls.library.types
1647
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1648
ctypes.POINTER
1649
(ctypes.c_ubyte)),
1650
ctypes.c_uint(len(openpgp))))
1651
# New empty GnuTLS certificate
1652
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1653
(gnutls.library.functions
1654
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1655
# Import the OpenPGP public key into the certificate
1656
(gnutls.library.functions
1657
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1658
gnutls.library.constants
1659
.GNUTLS_OPENPGP_FMT_RAW))
1660
# Verify the self signature in the key
1661
crtverify = ctypes.c_uint()
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_verify_self(crt, 0,
1664
ctypes.byref(crtverify)))
1665
if crtverify.value != 0:
1666
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1667
raise (gnutls.errors.CertificateSecurityError
1668
("Verify failed"))
1669
# New buffer for the fingerprint
1670
buf = ctypes.create_string_buffer(20)
1671
buf_len = ctypes.c_size_t()
1672
# Get the fingerprint from the certificate into the buffer
1673
(gnutls.library.functions
1674
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1675
ctypes.byref(buf_len)))
1676
# Deinit the certificate
1677
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1678
# Convert the buffer to a Python bytestring
1679
fpr = ctypes.string_at(buf, buf_len.value)
1680
# Convert the bytestring to hexadecimal notation
1681
hex_fpr = binascii.hexlify(fpr).upper()
1682
return hex_fpr
1683
1684
1685
class MultiprocessingMixIn(object):
1686
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1687
def sub_process_main(self, request, address):
1688
try:
1689
self.finish_request(request, address)
1690
except Exception:
1691
self.handle_error(request, address)
1692
self.close_request(request)
1693
1694
def process_request(self, request, address):
1695
"""Start a new process to process the request."""
1696
proc = multiprocessing.Process(target = self.sub_process_main,
1697
args = (request,
1698
address))
1699
proc.start()
1700
return proc
1701
1702
1703
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1704
""" adds a pipe to the MixIn """
1705
def process_request(self, request, client_address):
1706
"""Overrides and wraps the original process_request().
1707
1708
This function creates a new pipe in self.pipe
1709
"""
1710
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1711
1712
proc = MultiprocessingMixIn.process_request(self, request,
1713
client_address)
1714
self.child_pipe.close()
1715
self.add_pipe(parent_pipe, proc)
1716
1717
def add_pipe(self, parent_pipe, proc):
1718
"""Dummy function; override as necessary"""
1719
raise NotImplementedError
1720
1721
1722
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1723
socketserver.TCPServer, object):
1724
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1725
494
1726
Attributes:
495
settings: Server settings
496
clients: Set() of Client objects
1727
enabled: Boolean; whether this server is activated yet
1728
interface: None or a network interface name (string)
1729
use_ipv6: Boolean; to use IPv6 or not
497
1730
"""
498
address_family = socket.AF_INET6
499
def __init__(self, *args, **kwargs):
500
if "settings" in kwargs:
501
self.settings = kwargs["settings"]
502
del kwargs["settings"]
503
if "clients" in kwargs:
504
self.clients = kwargs["clients"]
505
del kwargs["clients"]
506
return super(type(self), self).__init__(*args, **kwargs)
1731
def __init__(self, server_address, RequestHandlerClass,
1732
interface=None, use_ipv6=True):
1733
self.interface = interface
1734
if use_ipv6:
1735
self.address_family = socket.AF_INET6
1736
socketserver.TCPServer.__init__(self, server_address,
1737
RequestHandlerClass)
507
1738
def server_bind(self):
508
1739
"""This overrides the normal server_bind() function
509
1740
to bind to an interface if one was specified, and also NOT to
510
1741
bind to an address or port if they were not specified."""
511
if self.settings["interface"]:
512
# 25 is from /usr/include/asm-i486/socket.h
513
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
514
try:
515
self.socket.setsockopt(socket.SOL_SOCKET,
516
SO_BINDTODEVICE,
517
self.settings["interface"])
518
except socket.error, error:
519
if error[0] == errno.EPERM:
520
logger.error(u"No permission to"
521
u" bind to interface %s",
522
self.settings["interface"])
523
else:
524
raise error
1742
if self.interface is not None:
1743
if SO_BINDTODEVICE is None:
1744
logger.error("SO_BINDTODEVICE does not exist;"
1745
" cannot bind to interface %s",
1746
self.interface)
1747
else:
1748
try:
1749
self.socket.setsockopt(socket.SOL_SOCKET,
1750
SO_BINDTODEVICE,
1751
str(self.interface
1752
+ '\0'))
1753
except socket.error as error:
1754
if error[0] == errno.EPERM:
1755
logger.error("No permission to"
1756
" bind to interface %s",
1757
self.interface)
1758
elif error[0] == errno.ENOPROTOOPT:
1759
logger.error("SO_BINDTODEVICE not available;"
1760
" cannot bind to interface %s",
1761
self.interface)
1762
else:
1763
raise
525
1764
# Only bind(2) the socket if we really need to.
526
1765
if self.server_address[0] or self.server_address[1]:
527
1766
if not self.server_address[0]:
528
in6addr_any = "::"
529
self.server_address = (in6addr_any,
1767
if self.address_family == socket.AF_INET6:
1768
any_address = "::" # in6addr_any
1769
else:
1770
any_address = socket.INADDR_ANY
1771
self.server_address = (any_address,
530
1772
self.server_address[1])
531
1773
elif not self.server_address[1]:
532
1774
self.server_address = (self.server_address[0],
533
1775
0)
534
# if self.settings["interface"]:
1776
# if self.interface:
535
1777
# self.server_address = (self.server_address[0],
536
1778
# 0, # port
537
1779
# 0, # flowinfo
538
1780
# if_nametoindex
539
# (self.settings
540
# ["interface"]))
541
return super(type(self), self).server_bind()
1781
# (self.interface))
1782
return socketserver.TCPServer.server_bind(self)
1783
1784
1785
class MandosServer(IPv6_TCPServer):
1786
"""Mandos server.
1787
1788
Attributes:
1789
clients: set of Client objects
1790
gnutls_priority GnuTLS priority string
1791
use_dbus: Boolean; to emit D-Bus signals or not
1792
1793
Assumes a gobject.MainLoop event loop.
1794
"""
1795
def __init__(self, server_address, RequestHandlerClass,
1796
interface=None, use_ipv6=True, clients=None,
1797
gnutls_priority=None, use_dbus=True):
1798
self.enabled = False
1799
self.clients = clients
1800
if self.clients is None:
1801
self.clients = {}
1802
self.use_dbus = use_dbus
1803
self.gnutls_priority = gnutls_priority
1804
IPv6_TCPServer.__init__(self, server_address,
1805
RequestHandlerClass,
1806
interface = interface,
1807
use_ipv6 = use_ipv6)
1808
def server_activate(self):
1809
if self.enabled:
1810
return socketserver.TCPServer.server_activate(self)
1811
1812
def enable(self):
1813
self.enabled = True
1814
1815
def add_pipe(self, parent_pipe, proc):
1816
# Call "handle_ipc" for both data and EOF events
1817
gobject.io_add_watch(parent_pipe.fileno(),
1818
gobject.IO_IN | gobject.IO_HUP,
1819
functools.partial(self.handle_ipc,
1820
parent_pipe =
1821
parent_pipe,
1822
proc = proc))
1823
1824
def handle_ipc(self, source, condition, parent_pipe=None,
1825
proc = None, client_object=None):
1826
condition_names = {
1827
gobject.IO_IN: "IN", # There is data to read.
1828
gobject.IO_OUT: "OUT", # Data can be written (without
1829
# blocking).
1830
gobject.IO_PRI: "PRI", # There is urgent data to read.
1831
gobject.IO_ERR: "ERR", # Error condition.
1832
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1833
# broken, usually for pipes and
1834
# sockets).
1835
}
1836
conditions_string = ' | '.join(name
1837
for cond, name in
1838
condition_names.iteritems()
1839
if cond & condition)
1840
# error, or the other end of multiprocessing.Pipe has closed
1841
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1842
# Wait for other process to exit
1843
proc.join()
1844
return False
1845
1846
# Read a request from the child
1847
request = parent_pipe.recv()
1848
command = request[0]
1849
1850
if command == 'init':
1851
fpr = request[1]
1852
address = request[2]
1853
1854
for c in self.clients.itervalues():
1855
if c.fingerprint == fpr:
1856
client = c
1857
break
1858
else:
1859
logger.info("Client not found for fingerprint: %s, ad"
1860
"dress: %s", fpr, address)
1861
if self.use_dbus:
1862
# Emit D-Bus signal
1863
mandos_dbus_service.ClientNotFound(fpr,
1864
address[0])
1865
parent_pipe.send(False)
1866
return False
1867
1868
gobject.io_add_watch(parent_pipe.fileno(),
1869
gobject.IO_IN | gobject.IO_HUP,
1870
functools.partial(self.handle_ipc,
1871
parent_pipe =
1872
parent_pipe,
1873
proc = proc,
1874
client_object =
1875
client))
1876
parent_pipe.send(True)
1877
# remove the old hook in favor of the new above hook on
1878
# same fileno
1879
return False
1880
if command == 'funcall':
1881
funcname = request[1]
1882
args = request[2]
1883
kwargs = request[3]
1884
1885
parent_pipe.send(('data', getattr(client_object,
1886
funcname)(*args,
1887
**kwargs)))
1888
1889
if command == 'getattr':
1890
attrname = request[1]
1891
if callable(client_object.__getattribute__(attrname)):
1892
parent_pipe.send(('function',))
1893
else:
1894
parent_pipe.send(('data', client_object
1895
.__getattribute__(attrname)))
1896
1897
if command == 'setattr':
1898
attrname = request[1]
1899
value = request[2]
1900
setattr(client_object, attrname, value)
1901
1902
return True
542
1903
543
1904
544
1905
def string_to_delta(interval):
545
1906
"""Parse a string and return a datetime.timedelta
546
1907
547
1908
>>> string_to_delta('7d')
548
1909
datetime.timedelta(7)
549
1910
>>> string_to_delta('60s')
552
1913
datetime.timedelta(0, 3600)
553
1914
>>> string_to_delta('24h')
554
1915
datetime.timedelta(1)
555
>>> string_to_delta(u'1w')
1916
>>> string_to_delta('1w')
556
1917
datetime.timedelta(7)
1918
>>> string_to_delta('5m 30s')
1919
datetime.timedelta(0, 330)
557
1920
"""
558
try:
559
suffix=unicode(interval[-1])
560
value=int(interval[:-1])
561
if suffix == u"d":
562
delta = datetime.timedelta(value)
563
elif suffix == u"s":
564
delta = datetime.timedelta(0, value)
565
elif suffix == u"m":
566
delta = datetime.timedelta(0, 0, 0, 0, value)
567
elif suffix == u"h":
568
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
569
elif suffix == u"w":
570
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
571
else:
572
raise ValueError
573
except (ValueError, IndexError):
574
raise ValueError
575
return delta
576
577
578
def server_state_changed(state):
579
"""Derived from the Avahi example code"""
580
if state == avahi.SERVER_COLLISION:
581
logger.error(u"Server name collision")
582
service.remove()
583
elif state == avahi.SERVER_RUNNING:
584
service.add()
585
586
587
def entry_group_state_changed(state, error):
588
"""Derived from the Avahi example code"""
589
logger.debug(u"state change: %i", state)
590
591
if state == avahi.ENTRY_GROUP_ESTABLISHED:
592
logger.debug(u"Service established.")
593
elif state == avahi.ENTRY_GROUP_COLLISION:
594
logger.warning(u"Service name collision.")
595
service.rename()
596
elif state == avahi.ENTRY_GROUP_FAILURE:
597
logger.critical(u"Error in group state changed %s",
598
unicode(error))
599
raise AvahiGroupError("State changed: %s", str(error))
600
601
def if_nametoindex(interface):
602
"""Call the C function if_nametoindex(), or equivalent"""
603
global if_nametoindex
604
try:
605
if "ctypes.util" not in sys.modules:
606
import ctypes.util
607
if_nametoindex = ctypes.cdll.LoadLibrary\
608
(ctypes.util.find_library("c")).if_nametoindex
609
except (OSError, AttributeError):
610
if "struct" not in sys.modules:
611
import struct
612
if "fcntl" not in sys.modules:
613
import fcntl
614
def if_nametoindex(interface):
615
"Get an interface index the hard way, i.e. using fcntl()"
616
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
617
s = socket.socket()
618
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
619
struct.pack("16s16x", interface))
620
s.close()
621
interface_index = struct.unpack("I", ifreq[16:20])[0]
622
return interface_index
623
return if_nametoindex(interface)
1921
timevalue = datetime.timedelta(0)
1922
for s in interval.split():
1923
try:
1924
suffix = unicode(s[-1])
1925
value = int(s[:-1])
1926
if suffix == "d":
1927
delta = datetime.timedelta(value)
1928
elif suffix == "s":
1929
delta = datetime.timedelta(0, value)
1930
elif suffix == "m":
1931
delta = datetime.timedelta(0, 0, 0, 0, value)
1932
elif suffix == "h":
1933
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1934
elif suffix == "w":
1935
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1936
else:
1937
raise ValueError("Unknown suffix %r" % suffix)
1938
except (ValueError, IndexError) as e:
1939
raise ValueError(*(e.args))
1940
timevalue += delta
1941
return timevalue
624
1942
625
1943
626
1944
def daemon(nochdir = False, noclose = False):
627
1945
"""See daemon(3). Standard BSD Unix function.
1946
628
1947
This should really exist as os.daemon, but it doesn't (yet)."""
629
1948
if os.fork():
630
1949
sys.exit()
638
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
639
1958
if not stat.S_ISCHR(os.fstat(null).st_mode):
640
1959
raise OSError(errno.ENODEV,
641
"/dev/null not a character device")
1960
"%s not a character device"
1961
% os.path.devnull)
642
1962
os.dup2(null, sys.stdin.fileno())
643
1963
os.dup2(null, sys.stdout.fileno())
644
1964
os.dup2(null, sys.stderr.fileno())
647
1967
648
1968
649
1969
def main():
650
global main_loop_started
651
main_loop_started = False
652
653
parser = OptionParser()
654
parser.add_option("-i", "--interface", type="string",
655
metavar="IF", help="Bind to interface IF")
656
parser.add_option("-a", "--address", type="string",
657
help="Address to listen for requests on")
658
parser.add_option("-p", "--port", type="int",
659
help="Port number to receive requests on")
660
parser.add_option("--check", action="store_true", default=False,
661
help="Run self-test")
662
parser.add_option("--debug", action="store_true",
663
help="Debug mode; run in foreground and log to"
664
" terminal")
665
parser.add_option("--priority", type="string", help="GnuTLS"
666
" priority string (see GnuTLS documentation)")
667
parser.add_option("--servicename", type="string", metavar="NAME",
668
help="Zeroconf service name")
669
parser.add_option("--configdir", type="string",
670
default="/etc/mandos", metavar="DIR",
671
help="Directory to search for configuration"
672
" files")
673
(options, args) = parser.parse_args()
1970
1971
##################################################################
1972
# Parsing of options, both command line and config file
1973
1974
parser = argparse.ArgumentParser()
1975
parser.add_argument("-v", "--version", action="version",
1976
version = "%%(prog)s %s" % version,
1977
help="show version number and exit")
1978
parser.add_argument("-i", "--interface", metavar="IF",
1979
help="Bind to interface IF")
1980
parser.add_argument("-a", "--address",
1981
help="Address to listen for requests on")
1982
parser.add_argument("-p", "--port", type=int,
1983
help="Port number to receive requests on")
1984
parser.add_argument("--check", action="store_true",
1985
help="Run self-test")
1986
parser.add_argument("--debug", action="store_true",
1987
help="Debug mode; run in foreground and log"
1988
" to terminal")
1989
parser.add_argument("--debuglevel", metavar="LEVEL",
1990
help="Debug level for stdout output")
1991
parser.add_argument("--priority", help="GnuTLS"
1992
" priority string (see GnuTLS documentation)")
1993
parser.add_argument("--servicename",
1994
metavar="NAME", help="Zeroconf service name")
1995
parser.add_argument("--configdir",
1996
default="/etc/mandos", metavar="DIR",
1997
help="Directory to search for configuration"
1998
" files")
1999
parser.add_argument("--no-dbus", action="store_false",
2000
dest="use_dbus", help="Do not provide D-Bus"
2001
" system bus interface")
2002
parser.add_argument("--no-ipv6", action="store_false",
2003
dest="use_ipv6", help="Do not use IPv6")
2004
parser.add_argument("--no-restore", action="store_false",
2005
dest="restore", help="Do not restore stored"
2006
" state")
2007
parser.add_argument("--statedir", metavar="DIR",
2008
help="Directory to save/restore state in")
2009
2010
options = parser.parse_args()
674
2011
675
2012
if options.check:
676
2013
import doctest
685
2022
"priority":
686
2023
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
687
2024
"servicename": "Mandos",
2025
"use_dbus": "True",
2026
"use_ipv6": "True",
2027
"debuglevel": "",
2028
"restore": "True",
2029
"statedir": "/var/lib/mandos"
688
2030
}
689
2031
690
2032
# Parse config file for server-global settings
691
server_config = ConfigParser.SafeConfigParser(server_defaults)
2033
server_config = configparser.SafeConfigParser(server_defaults)
692
2034
del server_defaults
693
server_config.read(os.path.join(options.configdir, "mandos.conf"))
694
server_section = "server"
2035
server_config.read(os.path.join(options.configdir,
2036
"mandos.conf"))
695
2037
# Convert the SafeConfigParser object to a dict
696
server_settings = dict(server_config.items(server_section))
697
# Use getboolean on the boolean config option
698
server_settings["debug"] = server_config.getboolean\
699
(server_section, "debug")
2038
server_settings = server_config.defaults()
2039
# Use the appropriate methods on the non-string config options
2040
for option in ("debug", "use_dbus", "use_ipv6"):
2041
server_settings[option] = server_config.getboolean("DEFAULT",
2042
option)
2043
if server_settings["port"]:
2044
server_settings["port"] = server_config.getint("DEFAULT",
2045
"port")
700
2046
del server_config
701
2047
702
2048
# Override the settings from the config file with command line
703
2049
# options, if set.
704
2050
for option in ("interface", "address", "port", "debug",
705
"priority", "servicename", "configdir"):
2051
"priority", "servicename", "configdir",
2052
"use_dbus", "use_ipv6", "debuglevel", "restore",
2053
"statedir"):
706
2054
value = getattr(options, option)
707
2055
if value is not None:
708
2056
server_settings[option] = value
709
2057
del options
2058
# Force all strings to be unicode
2059
for option in server_settings.keys():
2060
if type(server_settings[option]) is str:
2061
server_settings[option] = unicode(server_settings[option])
710
2062
# Now we have our good server settings in "server_settings"
711
2063
2064
##################################################################
2065
2066
# For convenience
2067
debug = server_settings["debug"]
2068
debuglevel = server_settings["debuglevel"]
2069
use_dbus = server_settings["use_dbus"]
2070
use_ipv6 = server_settings["use_ipv6"]
2071
stored_state_path = os.path.join(server_settings["statedir"],
2072
stored_state_file)
2073
2074
if debug:
2075
initlogger(debug, logging.DEBUG)
2076
else:
2077
if not debuglevel:
2078
initlogger(debug)
2079
else:
2080
level = getattr(logging, debuglevel.upper())
2081
initlogger(debug, level)
2082
2083
if server_settings["servicename"] != "Mandos":
2084
syslogger.setFormatter(logging.Formatter
2085
('Mandos (%s) [%%(process)d]:'
2086
' %%(levelname)s: %%(message)s'
2087
% server_settings["servicename"]))
2088
712
2089
# Parse config file with clients
713
client_defaults = { "timeout": "1h",
714
"interval": "5m",
715
"checker": "fping -q -- %%(fqdn)s",
716
}
717
client_config = ConfigParser.SafeConfigParser(client_defaults)
2090
client_config = configparser.SafeConfigParser(Client
2091
.client_defaults)
718
2092
client_config.read(os.path.join(server_settings["configdir"],
719
2093
"clients.conf"))
720
2094
721
global service
722
service = AvahiService(name = server_settings["servicename"],
723
type = "_mandos._tcp", );
724
if server_settings["interface"]:
725
service.interface = if_nametoindex(server_settings["interface"])
2095
global mandos_dbus_service
2096
mandos_dbus_service = None
2097
2098
tcp_server = MandosServer((server_settings["address"],
2099
server_settings["port"]),
2100
ClientHandler,
2101
interface=(server_settings["interface"]
2102
or None),
2103
use_ipv6=use_ipv6,
2104
gnutls_priority=
2105
server_settings["priority"],
2106
use_dbus=use_dbus)
2107
if not debug:
2108
pidfilename = "/var/run/mandos.pid"
2109
try:
2110
pidfile = open(pidfilename, "w")
2111
except IOError:
2112
logger.error("Could not open file %r", pidfilename)
2113
2114
try:
2115
uid = pwd.getpwnam("_mandos").pw_uid
2116
gid = pwd.getpwnam("_mandos").pw_gid
2117
except KeyError:
2118
try:
2119
uid = pwd.getpwnam("mandos").pw_uid
2120
gid = pwd.getpwnam("mandos").pw_gid
2121
except KeyError:
2122
try:
2123
uid = pwd.getpwnam("nobody").pw_uid
2124
gid = pwd.getpwnam("nobody").pw_gid
2125
except KeyError:
2126
uid = 65534
2127
gid = 65534
2128
try:
2129
os.setgid(gid)
2130
os.setuid(uid)
2131
except OSError as error:
2132
if error[0] != errno.EPERM:
2133
raise error
2134
2135
if debug:
2136
# Enable all possible GnuTLS debugging
2137
2138
# "Use a log level over 10 to enable all debugging options."
2139
# - GnuTLS manual
2140
gnutls.library.functions.gnutls_global_set_log_level(11)
2141
2142
@gnutls.library.types.gnutls_log_func
2143
def debug_gnutls(level, string):
2144
logger.debug("GnuTLS: %s", string[:-1])
2145
2146
(gnutls.library.functions
2147
.gnutls_global_set_log_function(debug_gnutls))
2148
2149
# Redirect stdin so all checkers get /dev/null
2150
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2151
os.dup2(null, sys.stdin.fileno())
2152
if null > 2:
2153
os.close(null)
2154
2155
# Need to fork before connecting to D-Bus
2156
if not debug:
2157
# Close all input and output, do double fork, etc.
2158
daemon()
2159
2160
gobject.threads_init()
726
2161
727
2162
global main_loop
728
global bus
729
global server
730
2163
# From the Avahi example code
731
2164
DBusGMainLoop(set_as_default=True )
732
2165
main_loop = gobject.MainLoop()
733
2166
bus = dbus.SystemBus()
734
server = dbus.Interface(
735
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
736
avahi.DBUS_INTERFACE_SERVER )
737
2167
# End of Avahi example code
738
739
debug = server_settings["debug"]
740
741
if debug:
742
console = logging.StreamHandler()
743
# console.setLevel(logging.DEBUG)
744
console.setFormatter(logging.Formatter\
745
('%(levelname)s: %(message)s'))
746
logger.addHandler(console)
747
del console
748
749
clients = Set()
750
def remove_from_clients(client):
751
clients.remove(client)
752
if not clients:
753
logger.critical(u"No clients left, exiting")
754
sys.exit()
755
756
clients.update(Set(Client(name = section,
757
stop_hook = remove_from_clients,
758
config
759
= dict(client_config.items(section)))
760
for section in client_config.sections()))
761
2168
if use_dbus:
2169
try:
2170
bus_name = dbus.service.BusName("se.recompile.Mandos",
2171
bus, do_not_queue=True)
2172
old_bus_name = (dbus.service.BusName
2173
("se.bsnet.fukt.Mandos", bus,
2174
do_not_queue=True))
2175
except dbus.exceptions.NameExistsException as e:
2176
logger.error(unicode(e) + ", disabling D-Bus")
2177
use_dbus = False
2178
server_settings["use_dbus"] = False
2179
tcp_server.use_dbus = False
2180
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2181
service = AvahiServiceToSyslog(name =
2182
server_settings["servicename"],
2183
servicetype = "_mandos._tcp",
2184
protocol = protocol, bus = bus)
2185
if server_settings["interface"]:
2186
service.interface = (if_nametoindex
2187
(str(server_settings["interface"])))
2188
2189
global multiprocessing_manager
2190
multiprocessing_manager = multiprocessing.Manager()
2191
2192
client_class = Client
2193
if use_dbus:
2194
client_class = functools.partial(ClientDBusTransitional,
2195
bus = bus)
2196
2197
client_settings = Client.config_parser(client_config)
2198
old_client_settings = {}
2199
clients_data = {}
2200
2201
# Get client data and settings from last running state.
2202
if server_settings["restore"]:
2203
try:
2204
with open(stored_state_path, "rb") as stored_state:
2205
clients_data, old_client_settings = (pickle.load
2206
(stored_state))
2207
os.remove(stored_state_path)
2208
except IOError as e:
2209
logger.warning("Could not load persistent state: {0}"
2210
.format(e))
2211
if e.errno != errno.ENOENT:
2212
raise
2213
except EOFError as e:
2214
logger.warning("Could not load persistent state: "
2215
"EOFError: {0}".format(e))
2216
2217
with PGPEngine() as pgp:
2218
for client_name, client in clients_data.iteritems():
2219
# Decide which value to use after restoring saved state.
2220
# We have three different values: Old config file,
2221
# new config file, and saved state.
2222
# New config value takes precedence if it differs from old
2223
# config value, otherwise use saved state.
2224
for name, value in client_settings[client_name].items():
2225
try:
2226
# For each value in new config, check if it
2227
# differs from the old config value (Except for
2228
# the "secret" attribute)
2229
if (name != "secret" and
2230
value != old_client_settings[client_name]
2231
[name]):
2232
client[name] = value
2233
except KeyError:
2234
pass
2235
2236
# Clients who has passed its expire date can still be
2237
# enabled if its last checker was successful. Clients
2238
# whose checker succeeded before we stored its state is
2239
# assumed to have successfully run all checkers during
2240
# downtime.
2241
if client["enabled"]:
2242
if datetime.datetime.utcnow() >= client["expires"]:
2243
if not client["last_checked_ok"]:
2244
logger.warning(
2245
"disabling client {0} - Client never "
2246
"performed a successful checker"
2247
.format(client_name))
2248
client["enabled"] = False
2249
elif client["last_checker_status"] != 0:
2250
logger.warning(
2251
"disabling client {0} - Client "
2252
"last checker failed with error code {1}"
2253
.format(client_name,
2254
client["last_checker_status"]))
2255
client["enabled"] = False
2256
else:
2257
client["expires"] = (datetime.datetime
2258
.utcnow()
2259
+ client["timeout"])
2260
logger.debug("Last checker succeeded,"
2261
" keeping {0} enabled"
2262
.format(client_name))
2263
try:
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
2267
["secret"]))
2268
except PGPError:
2269
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
2274
2275
2276
# Add/remove clients based on new changes made to config
2277
for client_name in (set(old_client_settings)
2278
- set(client_settings)):
2279
del clients_data[client_name]
2280
for client_name in (set(client_settings)
2281
- set(old_client_settings)):
2282
clients_data[client_name] = client_settings[client_name]
2283
2284
# Create all client objects
2285
for client_name, client in clients_data.iteritems():
2286
tcp_server.clients[client_name] = client_class(
2287
name = client_name, settings = client)
2288
2289
if not tcp_server.clients:
2290
logger.warning("No clients defined")
2291
762
2292
if not debug:
763
daemon()
2293
try:
2294
with pidfile:
2295
pid = os.getpid()
2296
pidfile.write(str(pid) + "\n".encode("utf-8"))
2297
del pidfile
2298
except IOError:
2299
logger.error("Could not write to file %r with PID %d",
2300
pidfilename, pid)
2301
except NameError:
2302
# "pidfile" was never created
2303
pass
2304
del pidfilename
2305
signal.signal(signal.SIGINT, signal.SIG_IGN)
2306
2307
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2308
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2309
2310
if use_dbus:
2311
class MandosDBusService(dbus.service.Object):
2312
"""A D-Bus proxy object"""
2313
def __init__(self):
2314
dbus.service.Object.__init__(self, bus, "/")
2315
_interface = "se.recompile.Mandos"
2316
2317
@dbus.service.signal(_interface, signature="o")
2318
def ClientAdded(self, objpath):
2319
"D-Bus signal"
2320
pass
2321
2322
@dbus.service.signal(_interface, signature="ss")
2323
def ClientNotFound(self, fingerprint, address):
2324
"D-Bus signal"
2325
pass
2326
2327
@dbus.service.signal(_interface, signature="os")
2328
def ClientRemoved(self, objpath, name):
2329
"D-Bus signal"
2330
pass
2331
2332
@dbus.service.method(_interface, out_signature="ao")
2333
def GetAllClients(self):
2334
"D-Bus method"
2335
return dbus.Array(c.dbus_object_path
2336
for c in
2337
tcp_server.clients.itervalues())
2338
2339
@dbus.service.method(_interface,
2340
out_signature="a{oa{sv}}")
2341
def GetAllClientsWithProperties(self):
2342
"D-Bus method"
2343
return dbus.Dictionary(
2344
((c.dbus_object_path, c.GetAll(""))
2345
for c in tcp_server.clients.itervalues()),
2346
signature="oa{sv}")
2347
2348
@dbus.service.method(_interface, in_signature="o")
2349
def RemoveClient(self, object_path):
2350
"D-Bus method"
2351
for c in tcp_server.clients.itervalues():
2352
if c.dbus_object_path == object_path:
2353
del tcp_server.clients[c.name]
2354
c.remove_from_connection()
2355
# Don't signal anything except ClientRemoved
2356
c.disable(quiet=True)
2357
# Emit D-Bus signal
2358
self.ClientRemoved(object_path, c.name)
2359
return
2360
raise KeyError(object_path)
2361
2362
del _interface
2363
2364
class MandosDBusServiceTransitional(MandosDBusService):
2365
__metaclass__ = AlternateDBusNamesMetaclass
2366
mandos_dbus_service = MandosDBusServiceTransitional()
764
2367
765
2368
def cleanup():
766
2369
"Cleanup function; run on exit"
767
global group
768
# From the Avahi example code
769
if not group is None:
770
group.Free()
771
group = None
772
# End of Avahi example code
773
774
while clients:
775
client = clients.pop()
776
client.stop_hook = None
777
client.stop()
2370
service.cleanup()
2371
2372
multiprocessing.active_children()
2373
if not (tcp_server.clients or client_settings):
2374
return
2375
2376
# Store client before exiting. Secrets are encrypted with key
2377
# based on what config file has. If config file is
2378
# removed/edited, old secret will thus be unrecovable.
2379
clients = {}
2380
with PGPEngine() as pgp:
2381
for client in tcp_server.clients.itervalues():
2382
key = client_settings[client.name]["secret"]
2383
client.encrypted_secret = pgp.encrypt(client.secret,
2384
key)
2385
client_dict = {}
2386
2387
# A list of attributes that can not be pickled
2388
# + secret.
2389
exclude = set(("bus", "changedstate", "secret",
2390
"checker"))
2391
for name, typ in (inspect.getmembers
2392
(dbus.service.Object)):
2393
exclude.add(name)
2394
2395
client_dict["encrypted_secret"] = (client
2396
.encrypted_secret)
2397
for attr in client.client_structure:
2398
if attr not in exclude:
2399
client_dict[attr] = getattr(client, attr)
2400
2401
clients[client.name] = client_dict
2402
del client_settings[client.name]["secret"]
2403
2404
try:
2405
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2406
prefix="clients-",
2407
dir=os.path.dirname
2408
(stored_state_path))
2409
with os.fdopen(tempfd, "wb") as stored_state:
2410
pickle.dump((clients, client_settings), stored_state)
2411
os.rename(tempname, stored_state_path)
2412
except (IOError, OSError) as e:
2413
logger.warning("Could not save persistent state: {0}"
2414
.format(e))
2415
if not debug:
2416
try:
2417
os.remove(tempname)
2418
except NameError:
2419
pass
2420
if e.errno not in set((errno.ENOENT, errno.EACCES,
2421
errno.EEXIST)):
2422
raise e
2423
2424
# Delete all clients, and settings from config
2425
while tcp_server.clients:
2426
name, client = tcp_server.clients.popitem()
2427
if use_dbus:
2428
client.remove_from_connection()
2429
# Don't signal anything except ClientRemoved
2430
client.disable(quiet=True)
2431
if use_dbus:
2432
# Emit D-Bus signal
2433
mandos_dbus_service.ClientRemoved(client
2434
.dbus_object_path,
2435
client.name)
2436
client_settings.clear()
778
2437
779
2438
atexit.register(cleanup)
780
2439
781
if not debug:
782
signal.signal(signal.SIGINT, signal.SIG_IGN)
783
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
784
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
785
786
for client in clients:
787
client.start()
788
789
tcp_server = IPv6_TCPServer((server_settings["address"],
790
server_settings["port"]),
791
tcp_handler,
792
settings=server_settings,
793
clients=clients)
2440
for client in tcp_server.clients.itervalues():
2441
if use_dbus:
2442
# Emit D-Bus signal
2443
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2444
# Need to initiate checking of clients
2445
if client.enabled:
2446
client.init_checker()
2447
2448
tcp_server.enable()
2449
tcp_server.server_activate()
2450
794
2451
# Find out what port we got
795
2452
service.port = tcp_server.socket.getsockname()[1]
796
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
797
u" scope_id %d" % tcp_server.socket.getsockname())
2453
if use_ipv6:
2454
logger.info("Now listening on address %r, port %d,"
2455
" flowinfo %d, scope_id %d"
2456
% tcp_server.socket.getsockname())
2457
else: # IPv4
2458
logger.info("Now listening on address %r, port %d"
2459
% tcp_server.socket.getsockname())
798
2460
799
2461
#service.interface = tcp_server.socket.getsockname()[3]
800
2462
801
2463
try:
802
2464
# From the Avahi example code
803
server.connect_to_signal("StateChanged", server_state_changed)
804
2465
try:
805
server_state_changed(server.GetState())
806
except dbus.exceptions.DBusException, error:
807
logger.critical(u"DBusException: %s", error)
2466
service.activate()
2467
except dbus.exceptions.DBusException as error:
2468
logger.critical("DBusException: %s", error)
2469
cleanup()
808
2470
sys.exit(1)
809
2471
# End of Avahi example code
810
2472
811
2473
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
812
2474
lambda *args, **kwargs:
813
tcp_server.handle_request\
814
(*args[2:], **kwargs) or True)
2475
(tcp_server.handle_request
2476
(*args[2:], **kwargs) or True))
815
2477
816
2478
logger.debug("Starting main loop")
817
main_loop_started = True
818
2479
main_loop.run()
819
except AvahiError, error:
820
logger.critical(u"AvahiError: %s" + unicode(error))
2480
except AvahiError as error:
2481
logger.critical("AvahiError: %s", error)
2482
cleanup()
821
2483
sys.exit(1)
822
2484
except KeyboardInterrupt:
823
2485
if debug:
824
print
2486
print("", file=sys.stderr)
2487
logger.debug("Server received KeyboardInterrupt")
2488
logger.debug("Server exiting")
2489
# Must run before the D-Bus bus name gets deregistered
2490
cleanup()
825
2491
826
2492
if __name__ == '__main__':
827
2493
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0