To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 226
- compare with another revision
- download diff
- download tarball
- view history from revision 226
- Committer: Teddy Hogeborn
- Date: 2008-10-04 20:09:53 UTC
- Revision ID: teddy@fukt.bsnet.se-20081004200953-7j0fjlq6fqsxs9t2
* Makefile (DOCS): Added "plugins.d/askpass-fifo.8mandos".
(install-client-nokey): Also install
"plugins.d/askpass-fifo.8mandos".
(uninstall-client): Also uninstall "plugins.d/askpass-fifo.8mandos".
* plugins.d/askpass-fifo.xml: New.
(install-client-nokey): Also install
"plugins.d/askpass-fifo.8mandos".
(uninstall-client): Also uninstall "plugins.d/askpass-fifo.8mandos".
* plugins.d/askpass-fifo.xml: New.
- files added:
- debian/mandos-client.config
- files removed:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
28
27
# along with this program. If not, see
29
28
# <http://www.gnu.org/licenses/>.
30
29
#
31
# Contact the authors at <mandos@recompile.se>.
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
33
from __future__ import division
36
34
37
import SocketServer as socketserver
35
import SocketServer
38
36
import socket
39
import argparse
37
from optparse import OptionParser
40
38
import datetime
41
39
import errno
42
40
import gnutls.crypto
45
43
import gnutls.library.functions
46
44
import gnutls.library.constants
47
45
import gnutls.library.types
48
import ConfigParser as configparser
46
import ConfigParser
49
47
import sys
50
48
import re
51
49
import os
52
50
import signal
51
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
68
58
69
59
import dbus
70
import dbus.service
71
60
import gobject
72
61
import avahi
73
62
from dbus.mainloop.glib import DBusGMainLoop
74
63
import ctypes
75
64
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 = "1.5.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(debug, level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
74
logger.addHandler(syslogger)
75
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
79
logger.addHandler(console)
211
80
212
81
class AvahiError(Exception):
213
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
214
83
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
218
87
219
88
class AvahiServiceError(AvahiError):
220
89
pass
225
94
226
95
class AvahiService(object):
227
96
"""An Avahi (Zeroconf) service.
228
229
97
Attributes:
230
98
interface: integer; avahi.IF_UNSPEC or an interface index.
231
99
Used to optionally bind to the specified interface.
239
107
max_renames: integer; maximum number of renames
240
108
rename_count: integer; counter so we only rename after collisions
241
109
a sensible number of times
242
group: D-Bus Entry Group
243
server: D-Bus Server
244
bus: dbus.SystemBus()
245
110
"""
246
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
250
114
self.interface = interface
251
115
self.name = name
252
116
self.type = servicetype
253
117
self.port = port
254
self.TXT = TXT if TXT is not None else []
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
255
122
self.domain = domain
256
123
self.host = host
257
124
self.rename_count = 0
258
125
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
264
126
def rename(self):
265
127
"""Derived from the Avahi example code"""
266
128
if self.rename_count >= self.max_renames:
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
269
131
self.rename_count)
270
132
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
274
self.name)
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
275
139
self.remove()
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)
140
self.add()
282
141
self.rename_count += 1
283
142
def remove(self):
284
143
"""Derived from the Avahi example code"""
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()
144
if group is not None:
145
group.Reset()
290
146
def add(self):
291
147
"""Derived from the Avahi example code"""
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
148
global group
149
if group is None:
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
388
173
class Client(object):
389
174
"""A representation of a client host served by this server.
390
391
175
Attributes:
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
176
name: string; from the config file, used in log messages
177
fingerprint: string (40 or 32 hexadecimal digits); used to
178
uniquely identify the client
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
185
interval: datetime.timedelta(); How often to start a new checker
186
stop_hook: If set, called by stop() as stop_hook(self)
187
checker: subprocess.Popen(); a running checker process used
188
to see if the client lives.
189
'None' if no process is running.
190
checker_initiator_tag: a gobject event source tag, or None
191
stop_initiator_tag: - '' -
192
checker_callback_tag: - '' -
193
checker_command: string; External command which is run to check if
194
client lives. %() expansions are done at
401
195
runtime with vars(self) as dict, so that for
402
196
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()
410
fingerprint: string (40 or 32 hexadecimal digits); used to
411
uniquely identify the client
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
197
Private attibutes:
198
_timeout: Real variable for 'timeout'
199
_interval: Real variable for 'interval'
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
201
_interval_milliseconds: - '' -
429
202
"""
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):
203
def _set_timeout(self, timeout):
204
"Setter function for 'timeout' attribute"
205
self._timeout = timeout
206
self._timeout_milliseconds = ((self.timeout.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.timeout.seconds * 1000)
209
+ (self.timeout.microseconds
210
// 1000))
211
timeout = property(lambda self: self._timeout,
212
_set_timeout)
213
del _set_timeout
214
def _set_interval(self, interval):
215
"Setter function for 'interval' attribute"
216
self._interval = interval
217
self._interval_milliseconds = ((self.interval.days
218
* 24 * 60 * 60 * 1000)
219
+ (self.interval.seconds
220
* 1000)
221
+ (self.interval.microseconds
222
// 1000))
223
interval = property(lambda self: self._interval,
224
_set_interval)
225
del _set_interval
226
def __init__(self, name = None, stop_hook=None, config=None):
510
227
"""Note: the 'checker' key in 'config' sets the
511
228
'checker_command' attribute and *not* the 'checker'
512
229
attribute."""
230
if config is None:
231
config = {}
513
232
self.name = 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)
233
logger.debug(u"Creating client %r", self.name)
529
234
# Uppercase and remove spaces from fingerprint for later
530
235
# comparison purposes with return value from the fingerprint()
531
236
# function
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
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(os.path.expanduser(os.path.expandvars
244
(config["secfile"])))
245
self.secret = secfile.read()
246
secfile.close()
247
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.now()
252
self.last_checked_ok = None
253
self.timeout = string_to_delta(config["timeout"])
254
self.interval = string_to_delta(config["interval"])
255
self.stop_hook = stop_hook
537
256
self.checker = None
538
257
self.checker_initiator_tag = None
539
self.disable_initiator_tag = None
258
self.stop_initiator_tag = None
540
259
self.checker_callback_tag = None
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):
260
self.check_command = config["checker"]
261
def start(self):
565
262
"""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):
263
# Schedule a new checker to be started an 'interval' from now,
264
# and every interval from then on.
265
self.checker_initiator_tag = gobject.timeout_add\
266
(self._interval_milliseconds,
267
self.start_checker)
268
# Also start a new checker *right now*.
269
self.start_checker()
270
# Schedule a stop() when 'timeout' has passed
271
self.stop_initiator_tag = gobject.timeout_add\
272
(self._timeout_milliseconds,
273
self.stop)
274
def stop(self):
275
"""Stop this client.
276
The possibility that a client might be restarted is left open,
277
but not currently used."""
278
# If this client doesn't have a secret, it is already stopped.
279
if hasattr(self, "secret") and self.secret:
280
logger.info(u"Stopping client %s", self.name)
281
self.secret = None
282
else:
578
283
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
284
if getattr(self, "stop_initiator_tag", False):
285
gobject.source_remove(self.stop_initiator_tag)
286
self.stop_initiator_tag = None
587
287
if getattr(self, "checker_initiator_tag", False):
588
288
gobject.source_remove(self.checker_initiator_tag)
589
289
self.checker_initiator_tag = None
590
290
self.stop_checker()
591
self.enabled = False
291
if self.stop_hook:
292
self.stop_hook(self)
592
293
# Do not run this again if called by a gobject.timeout_add
593
294
return False
594
595
295
def __del__(self):
596
self.disable()
597
598
def init_checker(self):
599
# Schedule a new checker to be started an 'interval' from now,
600
# and every interval from then on.
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))
608
# Also start a new checker *right now*.
609
self.start_checker()
610
611
def checker_callback(self, pid, condition, command):
296
self.stop_hook = None
297
self.stop()
298
def checker_callback(self, pid, condition):
612
299
"""The checker has completed, so take appropriate actions."""
300
now = datetime.datetime.now()
613
301
self.checker_callback_tag = None
614
302
self.checker = None
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?",
303
if os.WIFEXITED(condition) \
304
and (os.WEXITSTATUS(condition) == 0):
305
logger.info(u"Checker for %(name)s succeeded",
306
vars(self))
307
self.last_checked_ok = now
308
gobject.source_remove(self.stop_initiator_tag)
309
self.stop_initiator_tag = gobject.timeout_add\
310
(self._timeout_milliseconds,
311
self.stop)
312
elif not os.WIFEXITED(condition):
313
logger.warning(u"Checker for %(name)s crashed?",
627
314
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
315
else:
316
logger.info(u"Checker for %(name)s failed",
317
vars(self))
649
318
def start_checker(self):
650
319
"""Start a new checker subprocess if one is not running.
651
652
320
If a checker already exists, leave it running and do
653
321
nothing."""
654
322
# The reason for not killing a running checker is that if we
657
325
# client would inevitably timeout, since no checker would get
658
326
# a chance to run to completion. If we instead leave running
659
327
# checkers alone, the checker would have to take more time
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
328
# than 'timeout' for the client to be declared invalid, which
329
# is as it should be.
677
330
if self.checker is None:
678
331
try:
679
# In case checker_command has exactly one % operator
680
command = self.checker_command % self.host
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
681
334
except TypeError:
682
335
# Escape attributes for the shell
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
336
escaped_attrs = dict((key, re.escape(str(val)))
337
for key, val in
338
vars(self).iteritems())
691
339
try:
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)
340
command = self.check_command % escaped_attrs
341
except TypeError, error:
342
logger.error(u'Could not format string "%s":'
343
u' %s', self.check_command, error)
696
344
return True # Try again later
697
self.current_checker_command = command
698
345
try:
699
logger.info("Starting checker %r for %s",
346
logger.info(u"Starting checker %r for %s",
700
347
command, self.name)
701
348
# We don't need to redirect stdout and stderr, since
702
349
# in normal mode, that is already done by daemon(),
705
352
self.checker = subprocess.Popen(command,
706
353
close_fds=True,
707
354
shell=True, cwd="/")
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",
355
self.checker_callback_tag = gobject.child_watch_add\
356
(self.checker.pid,
357
self.checker_callback)
358
except OSError, error:
359
logger.error(u"Failed to start subprocess: %s",
720
360
error)
721
361
# Re-run this periodically if run by gobject.timeout_add
722
362
return True
723
724
363
def stop_checker(self):
725
364
"""Force the checker process, if any, to stop."""
726
365
if self.checker_callback_tag:
728
367
self.checker_callback_tag = None
729
368
if getattr(self, "checker", None) is None:
730
369
return
731
logger.debug("Stopping checker for %(name)s", vars(self))
370
logger.debug(u"Stopping checker for %(name)s", vars(self))
732
371
try:
733
372
os.kill(self.checker.pid, signal.SIGTERM)
734
#time.sleep(0.5)
373
#os.sleep(0.5)
735
374
#if self.checker.poll() is None:
736
375
# os.kill(self.checker.pid, signal.SIGKILL)
737
except OSError as error:
376
except OSError, error:
738
377
if error.errno != errno.ESRCH: # No such process
739
378
raise
740
379
self.checker = None
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
# NewRequest - signal
1228
@dbus.service.signal(_interface, signature="s")
1229
def NewRequest(self, ip):
1230
"""D-Bus signal
1231
Is sent after a client request a secret.
1232
"""
1233
pass
1234
1235
## Methods
1236
1237
# Approve - method
1238
@dbus.service.method(_interface, in_signature="b")
1239
def Approve(self, value):
1240
self.approve(value)
1241
1242
# CheckedOK - method
1243
@dbus.service.method(_interface)
1244
def CheckedOK(self):
1245
self.checked_ok()
1246
1247
# Enable - method
1248
@dbus.service.method(_interface)
1249
def Enable(self):
1250
"D-Bus method"
1251
self.enable()
1252
1253
# StartChecker - method
1254
@dbus.service.method(_interface)
1255
def StartChecker(self):
1256
"D-Bus method"
1257
self.start_checker()
1258
1259
# Disable - method
1260
@dbus.service.method(_interface)
1261
def Disable(self):
1262
"D-Bus method"
1263
self.disable()
1264
1265
# StopChecker - method
1266
@dbus.service.method(_interface)
1267
def StopChecker(self):
1268
self.stop_checker()
1269
1270
## Properties
1271
1272
# ApprovalPending - property
1273
@dbus_service_property(_interface, signature="b", access="read")
1274
def ApprovalPending_dbus_property(self):
1275
return dbus.Boolean(bool(self.approvals_pending))
1276
1277
# ApprovedByDefault - property
1278
@dbus_service_property(_interface, signature="b",
1279
access="readwrite")
1280
def ApprovedByDefault_dbus_property(self, value=None):
1281
if value is None: # get
1282
return dbus.Boolean(self.approved_by_default)
1283
self.approved_by_default = bool(value)
1284
1285
# ApprovalDelay - property
1286
@dbus_service_property(_interface, signature="t",
1287
access="readwrite")
1288
def ApprovalDelay_dbus_property(self, value=None):
1289
if value is None: # get
1290
return dbus.UInt64(self.approval_delay_milliseconds())
1291
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1292
1293
# ApprovalDuration - property
1294
@dbus_service_property(_interface, signature="t",
1295
access="readwrite")
1296
def ApprovalDuration_dbus_property(self, value=None):
1297
if value is None: # get
1298
return dbus.UInt64(timedelta_to_milliseconds(
1299
self.approval_duration))
1300
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1301
1302
# Name - property
1303
@dbus_service_property(_interface, signature="s", access="read")
1304
def Name_dbus_property(self):
1305
return dbus.String(self.name)
1306
1307
# Fingerprint - property
1308
@dbus_service_property(_interface, signature="s", access="read")
1309
def Fingerprint_dbus_property(self):
1310
return dbus.String(self.fingerprint)
1311
1312
# Host - property
1313
@dbus_service_property(_interface, signature="s",
1314
access="readwrite")
1315
def Host_dbus_property(self, value=None):
1316
if value is None: # get
1317
return dbus.String(self.host)
1318
self.host = unicode(value)
1319
1320
# Created - property
1321
@dbus_service_property(_interface, signature="s", access="read")
1322
def Created_dbus_property(self):
1323
return datetime_to_dbus(self.created)
1324
1325
# LastEnabled - property
1326
@dbus_service_property(_interface, signature="s", access="read")
1327
def LastEnabled_dbus_property(self):
1328
return datetime_to_dbus(self.last_enabled)
1329
1330
# Enabled - property
1331
@dbus_service_property(_interface, signature="b",
1332
access="readwrite")
1333
def Enabled_dbus_property(self, value=None):
1334
if value is None: # get
1335
return dbus.Boolean(self.enabled)
1336
if value:
1337
self.enable()
1338
else:
1339
self.disable()
1340
1341
# LastCheckedOK - property
1342
@dbus_service_property(_interface, signature="s",
1343
access="readwrite")
1344
def LastCheckedOK_dbus_property(self, value=None):
1345
if value is not None:
1346
self.checked_ok()
1347
return
1348
return datetime_to_dbus(self.last_checked_ok)
1349
1350
# Expires - property
1351
@dbus_service_property(_interface, signature="s", access="read")
1352
def Expires_dbus_property(self):
1353
return datetime_to_dbus(self.expires)
1354
1355
# LastApprovalRequest - property
1356
@dbus_service_property(_interface, signature="s", access="read")
1357
def LastApprovalRequest_dbus_property(self):
1358
return datetime_to_dbus(self.last_approval_request)
1359
1360
# Timeout - property
1361
@dbus_service_property(_interface, signature="t",
1362
access="readwrite")
1363
def Timeout_dbus_property(self, value=None):
1364
if value is None: # get
1365
return dbus.UInt64(self.timeout_milliseconds())
1366
self.timeout = datetime.timedelta(0, 0, 0, value)
1367
# Reschedule timeout
1368
if self.enabled:
1369
now = datetime.datetime.utcnow()
1370
time_to_die = timedelta_to_milliseconds(
1371
(self.last_checked_ok + self.timeout) - now)
1372
if time_to_die <= 0:
1373
# The timeout has passed
1374
self.disable()
1375
else:
1376
self.expires = (now +
1377
datetime.timedelta(milliseconds =
1378
time_to_die))
1379
if (getattr(self, "disable_initiator_tag", None)
1380
is None):
1381
return
1382
gobject.source_remove(self.disable_initiator_tag)
1383
self.disable_initiator_tag = (gobject.timeout_add
1384
(time_to_die,
1385
self.disable))
1386
1387
# ExtendedTimeout - property
1388
@dbus_service_property(_interface, signature="t",
1389
access="readwrite")
1390
def ExtendedTimeout_dbus_property(self, value=None):
1391
if value is None: # get
1392
return dbus.UInt64(self.extended_timeout_milliseconds())
1393
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1394
1395
# Interval - property
1396
@dbus_service_property(_interface, signature="t",
1397
access="readwrite")
1398
def Interval_dbus_property(self, value=None):
1399
if value is None: # get
1400
return dbus.UInt64(self.interval_milliseconds())
1401
self.interval = datetime.timedelta(0, 0, 0, value)
1402
if getattr(self, "checker_initiator_tag", None) is None:
1403
return
1404
if self.enabled:
1405
# Reschedule checker run
1406
gobject.source_remove(self.checker_initiator_tag)
1407
self.checker_initiator_tag = (gobject.timeout_add
1408
(value, self.start_checker))
1409
self.start_checker() # Start one now, too
1410
1411
# Checker - property
1412
@dbus_service_property(_interface, signature="s",
1413
access="readwrite")
1414
def Checker_dbus_property(self, value=None):
1415
if value is None: # get
1416
return dbus.String(self.checker_command)
1417
self.checker_command = unicode(value)
1418
1419
# CheckerRunning - property
1420
@dbus_service_property(_interface, signature="b",
1421
access="readwrite")
1422
def CheckerRunning_dbus_property(self, value=None):
1423
if value is None: # get
1424
return dbus.Boolean(self.checker is not None)
1425
if value:
1426
self.start_checker()
1427
else:
1428
self.stop_checker()
1429
1430
# ObjectPath - property
1431
@dbus_service_property(_interface, signature="o", access="read")
1432
def ObjectPath_dbus_property(self):
1433
return self.dbus_object_path # is already a dbus.ObjectPath
1434
1435
# Secret = property
1436
@dbus_service_property(_interface, signature="ay",
1437
access="write", byte_arrays=True)
1438
def Secret_dbus_property(self, value):
1439
self.secret = str(value)
1440
1441
del _interface
1442
1443
1444
class ProxyClient(object):
1445
def __init__(self, child_pipe, fpr, address):
1446
self._pipe = child_pipe
1447
self._pipe.send(('init', fpr, address))
1448
if not self._pipe.recv():
1449
raise KeyError()
1450
1451
def __getattribute__(self, name):
1452
if name == '_pipe':
1453
return super(ProxyClient, self).__getattribute__(name)
1454
self._pipe.send(('getattr', name))
1455
data = self._pipe.recv()
1456
if data[0] == 'data':
1457
return data[1]
1458
if data[0] == 'function':
1459
def func(*args, **kwargs):
1460
self._pipe.send(('funcall', name, args, kwargs))
1461
return self._pipe.recv()[1]
1462
return func
1463
1464
def __setattr__(self, name, value):
1465
if name == '_pipe':
1466
return super(ProxyClient, self).__setattr__(name, value)
1467
self._pipe.send(('setattr', name, value))
1468
1469
1470
class ClientDBusTransitional(ClientDBus):
1471
__metaclass__ = AlternateDBusNamesMetaclass
1472
1473
1474
class ClientHandler(socketserver.BaseRequestHandler, object):
1475
"""A class to handle client connections.
1476
1477
Instantiated once for each connection to handle it.
380
def still_valid(self):
381
"""Has the timeout not yet passed for this client?"""
382
now = datetime.datetime.now()
383
if self.last_checked_ok is None:
384
return now < (self.created + self.timeout)
385
else:
386
return now < (self.last_checked_ok + self.timeout)
387
388
389
def peer_certificate(session):
390
"Return the peer's OpenPGP certificate as a bytestring"
391
# If not an OpenPGP certificate...
392
if gnutls.library.functions.gnutls_certificate_type_get\
393
(session._c_object) \
394
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
395
# ...do the normal thing
396
return session.peer_certificate
397
list_size = ctypes.c_uint()
398
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
399
(session._c_object, ctypes.byref(list_size))
400
if list_size.value == 0:
401
return None
402
cert = cert_list[0]
403
return ctypes.string_at(cert.data, cert.size)
404
405
406
def fingerprint(openpgp):
407
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
408
# New GnuTLS "datum" with the OpenPGP public key
409
datum = gnutls.library.types.gnutls_datum_t\
410
(ctypes.cast(ctypes.c_char_p(openpgp),
411
ctypes.POINTER(ctypes.c_ubyte)),
412
ctypes.c_uint(len(openpgp)))
413
# New empty GnuTLS certificate
414
crt = gnutls.library.types.gnutls_openpgp_crt_t()
415
gnutls.library.functions.gnutls_openpgp_crt_init\
416
(ctypes.byref(crt))
417
# Import the OpenPGP public key into the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_import\
419
(crt, ctypes.byref(datum),
420
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
421
# Verify the self signature in the key
422
crtverify = ctypes.c_uint()
423
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
424
(crt, 0, ctypes.byref(crtverify))
425
if crtverify.value != 0:
426
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
427
raise gnutls.errors.CertificateSecurityError("Verify failed")
428
# New buffer for the fingerprint
429
buf = ctypes.create_string_buffer(20)
430
buf_len = ctypes.c_size_t()
431
# Get the fingerprint from the certificate into the buffer
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
433
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
434
# Deinit the certificate
435
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
436
# Convert the buffer to a Python bytestring
437
fpr = ctypes.string_at(buf, buf_len.value)
438
# Convert the bytestring to hexadecimal notation
439
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
440
return hex_fpr
441
442
443
class TCP_handler(SocketServer.BaseRequestHandler, object):
444
"""A TCP request handler class.
445
Instantiated by IPv6_TCPServer for each request to handle it.
1478
446
Note: This will run in its own forked process."""
1479
447
1480
448
def handle(self):
1481
with contextlib.closing(self.server.child_pipe) as child_pipe:
1482
logger.info("TCP connection from: %s",
1483
unicode(self.client_address))
1484
logger.debug("Pipe FD: %d",
1485
self.server.child_pipe.fileno())
1486
1487
session = (gnutls.connection
1488
.ClientSession(self.request,
1489
gnutls.connection
1490
.X509Credentials()))
1491
1492
# Note: gnutls.connection.X509Credentials is really a
1493
# generic GnuTLS certificate credentials object so long as
1494
# no X.509 keys are added to it. Therefore, we can use it
1495
# here despite using OpenPGP certificates.
1496
1497
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1498
# "+AES-256-CBC", "+SHA1",
1499
# "+COMP-NULL", "+CTYPE-OPENPGP",
1500
# "+DHE-DSS"))
1501
# Use a fallback default, since this MUST be set.
1502
priority = self.server.gnutls_priority
1503
if priority is None:
1504
priority = "NORMAL"
1505
(gnutls.library.functions
1506
.gnutls_priority_set_direct(session._c_object,
1507
priority, None))
1508
1509
# Start communication using the Mandos protocol
1510
# Get protocol number
1511
line = self.request.makefile().readline()
1512
logger.debug("Protocol version: %r", line)
1513
try:
1514
if int(line.strip().split()[0]) > 1:
1515
raise RuntimeError
1516
except (ValueError, IndexError, RuntimeError) as error:
1517
logger.error("Unknown protocol version: %s", error)
1518
return
1519
1520
# Start GnuTLS connection
1521
try:
1522
session.handshake()
1523
except gnutls.errors.GNUTLSError as error:
1524
logger.warning("Handshake failed: %s", error)
1525
# Do not run session.bye() here: the session is not
1526
# established. Just abandon the request.
1527
return
1528
logger.debug("Handshake succeeded")
1529
1530
approval_required = False
1531
try:
1532
try:
1533
fpr = self.fingerprint(self.peer_certificate
1534
(session))
1535
except (TypeError,
1536
gnutls.errors.GNUTLSError) as error:
1537
logger.warning("Bad certificate: %s", error)
1538
return
1539
logger.debug("Fingerprint: %s", fpr)
1540
1541
try:
1542
client = ProxyClient(child_pipe, fpr,
1543
self.client_address)
1544
except KeyError:
1545
return
1546
1547
if self.server.use_dbus:
1548
# Emit D-Bus signal
1549
client.NewRequest(unicode(self.client_address)[0])
1550
1551
if client.approval_delay:
1552
delay = client.approval_delay
1553
client.approvals_pending += 1
1554
approval_required = True
1555
1556
while True:
1557
if not client.enabled:
1558
logger.info("Client %s is disabled",
1559
client.name)
1560
if self.server.use_dbus:
1561
# Emit D-Bus signal
1562
client.Rejected("Disabled")
1563
return
1564
1565
if client.approved or not client.approval_delay:
1566
#We are approved or approval is disabled
1567
break
1568
elif client.approved is None:
1569
logger.info("Client %s needs approval",
1570
client.name)
1571
if self.server.use_dbus:
1572
# Emit D-Bus signal
1573
client.NeedApproval(
1574
client.approval_delay_milliseconds(),
1575
client.approved_by_default)
1576
else:
1577
logger.warning("Client %s was not approved",
1578
client.name)
1579
if self.server.use_dbus:
1580
# Emit D-Bus signal
1581
client.Rejected("Denied")
1582
return
1583
1584
#wait until timeout or approved
1585
time = datetime.datetime.now()
1586
client.changedstate.acquire()
1587
(client.changedstate.wait
1588
(float(client.timedelta_to_milliseconds(delay)
1589
/ 1000)))
1590
client.changedstate.release()
1591
time2 = datetime.datetime.now()
1592
if (time2 - time) >= delay:
1593
if not client.approved_by_default:
1594
logger.warning("Client %s timed out while"
1595
" waiting for approval",
1596
client.name)
1597
if self.server.use_dbus:
1598
# Emit D-Bus signal
1599
client.Rejected("Approval timed out")
1600
return
1601
else:
1602
break
1603
else:
1604
delay -= time2 - time
1605
1606
sent_size = 0
1607
while sent_size < len(client.secret):
1608
try:
1609
sent = session.send(client.secret[sent_size:])
1610
except gnutls.errors.GNUTLSError as error:
1611
logger.warning("gnutls send failed")
1612
return
1613
logger.debug("Sent: %d, remaining: %d",
1614
sent, len(client.secret)
1615
- (sent_size + sent))
1616
sent_size += sent
1617
1618
logger.info("Sending secret to %s", client.name)
1619
# bump the timeout using extended_timeout
1620
client.checked_ok(client.extended_timeout)
1621
if self.server.use_dbus:
1622
# Emit D-Bus signal
1623
client.GotSecret()
1624
1625
finally:
1626
if approval_required:
1627
client.approvals_pending -= 1
1628
try:
1629
session.bye()
1630
except gnutls.errors.GNUTLSError as error:
1631
logger.warning("GnuTLS bye failed")
1632
1633
@staticmethod
1634
def peer_certificate(session):
1635
"Return the peer's OpenPGP certificate as a bytestring"
1636
# If not an OpenPGP certificate...
1637
if (gnutls.library.functions
1638
.gnutls_certificate_type_get(session._c_object)
1639
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1640
# ...do the normal thing
1641
return session.peer_certificate
1642
list_size = ctypes.c_uint(1)
1643
cert_list = (gnutls.library.functions
1644
.gnutls_certificate_get_peers
1645
(session._c_object, ctypes.byref(list_size)))
1646
if not bool(cert_list) and list_size.value != 0:
1647
raise gnutls.errors.GNUTLSError("error getting peer"
1648
" certificate")
1649
if list_size.value == 0:
1650
return None
1651
cert = cert_list[0]
1652
return ctypes.string_at(cert.data, cert.size)
1653
1654
@staticmethod
1655
def fingerprint(openpgp):
1656
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1657
# New GnuTLS "datum" with the OpenPGP public key
1658
datum = (gnutls.library.types
1659
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1660
ctypes.POINTER
1661
(ctypes.c_ubyte)),
1662
ctypes.c_uint(len(openpgp))))
1663
# New empty GnuTLS certificate
1664
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1665
(gnutls.library.functions
1666
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1667
# Import the OpenPGP public key into the certificate
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1670
gnutls.library.constants
1671
.GNUTLS_OPENPGP_FMT_RAW))
1672
# Verify the self signature in the key
1673
crtverify = ctypes.c_uint()
1674
(gnutls.library.functions
1675
.gnutls_openpgp_crt_verify_self(crt, 0,
1676
ctypes.byref(crtverify)))
1677
if crtverify.value != 0:
1678
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1679
raise (gnutls.errors.CertificateSecurityError
1680
("Verify failed"))
1681
# New buffer for the fingerprint
1682
buf = ctypes.create_string_buffer(20)
1683
buf_len = ctypes.c_size_t()
1684
# Get the fingerprint from the certificate into the buffer
1685
(gnutls.library.functions
1686
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1687
ctypes.byref(buf_len)))
1688
# Deinit the certificate
1689
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1690
# Convert the buffer to a Python bytestring
1691
fpr = ctypes.string_at(buf, buf_len.value)
1692
# Convert the bytestring to hexadecimal notation
1693
hex_fpr = binascii.hexlify(fpr).upper()
1694
return hex_fpr
1695
1696
1697
class MultiprocessingMixIn(object):
1698
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1699
def sub_process_main(self, request, address):
1700
try:
1701
self.finish_request(request, address)
1702
except Exception:
1703
self.handle_error(request, address)
1704
self.close_request(request)
1705
1706
def process_request(self, request, address):
1707
"""Start a new process to process the request."""
1708
proc = multiprocessing.Process(target = self.sub_process_main,
1709
args = (request,
1710
address))
1711
proc.start()
1712
return proc
1713
1714
1715
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1716
""" adds a pipe to the MixIn """
1717
def process_request(self, request, client_address):
1718
"""Overrides and wraps the original process_request().
1719
1720
This function creates a new pipe in self.pipe
1721
"""
1722
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1723
1724
proc = MultiprocessingMixIn.process_request(self, request,
1725
client_address)
1726
self.child_pipe.close()
1727
self.add_pipe(parent_pipe, proc)
1728
1729
def add_pipe(self, parent_pipe, proc):
1730
"""Dummy function; override as necessary"""
1731
raise NotImplementedError
1732
1733
1734
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1735
socketserver.TCPServer, object):
1736
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1737
449
logger.info(u"TCP connection from: %s",
450
unicode(self.client_address))
451
session = gnutls.connection.ClientSession\
452
(self.request, gnutls.connection.X509Credentials())
453
454
line = self.request.makefile().readline()
455
logger.debug(u"Protocol version: %r", line)
456
try:
457
if int(line.strip().split()[0]) > 1:
458
raise RuntimeError
459
except (ValueError, IndexError, RuntimeError), error:
460
logger.error(u"Unknown protocol version: %s", error)
461
return
462
463
# Note: gnutls.connection.X509Credentials is really a generic
464
# GnuTLS certificate credentials object so long as no X.509
465
# keys are added to it. Therefore, we can use it here despite
466
# using OpenPGP certificates.
467
468
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
469
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
470
# "+DHE-DSS"))
471
priority = "NORMAL" # Fallback default, since this
472
# MUST be set.
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
475
gnutls.library.functions.gnutls_priority_set_direct\
476
(session._c_object, priority, None)
477
478
try:
479
session.handshake()
480
except gnutls.errors.GNUTLSError, error:
481
logger.warning(u"Handshake failed: %s", error)
482
# Do not run session.bye() here: the session is not
483
# established. Just abandon the request.
484
return
485
try:
486
fpr = fingerprint(peer_certificate(session))
487
except (TypeError, gnutls.errors.GNUTLSError), error:
488
logger.warning(u"Bad certificate: %s", error)
489
session.bye()
490
return
491
logger.debug(u"Fingerprint: %s", fpr)
492
client = None
493
for c in self.server.clients:
494
if c.fingerprint == fpr:
495
client = c
496
break
497
if not client:
498
logger.warning(u"Client not found for fingerprint: %s",
499
fpr)
500
session.bye()
501
return
502
# Have to check if client.still_valid(), since it is possible
503
# that the client timed out while establishing the GnuTLS
504
# session.
505
if not client.still_valid():
506
logger.warning(u"Client %(name)s is invalid",
507
vars(client))
508
session.bye()
509
return
510
sent_size = 0
511
while sent_size < len(client.secret):
512
sent = session.send(client.secret[sent_size:])
513
logger.debug(u"Sent: %d, remaining: %d",
514
sent, len(client.secret)
515
- (sent_size + sent))
516
sent_size += sent
517
session.bye()
518
519
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1738
522
Attributes:
523
settings: Server settings
524
clients: Set() of Client objects
1739
525
enabled: Boolean; whether this server is activated yet
1740
interface: None or a network interface name (string)
1741
use_ipv6: Boolean; to use IPv6 or not
1742
526
"""
1743
def __init__(self, server_address, RequestHandlerClass,
1744
interface=None, use_ipv6=True):
1745
self.interface = interface
1746
if use_ipv6:
1747
self.address_family = socket.AF_INET6
1748
socketserver.TCPServer.__init__(self, server_address,
1749
RequestHandlerClass)
527
address_family = socket.AF_INET6
528
def __init__(self, *args, **kwargs):
529
if "settings" in kwargs:
530
self.settings = kwargs["settings"]
531
del kwargs["settings"]
532
if "clients" in kwargs:
533
self.clients = kwargs["clients"]
534
del kwargs["clients"]
535
self.enabled = False
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1750
537
def server_bind(self):
1751
538
"""This overrides the normal server_bind() function
1752
539
to bind to an interface if one was specified, and also NOT to
1753
540
bind to an address or port if they were not specified."""
1754
if self.interface is not None:
1755
if SO_BINDTODEVICE is None:
1756
logger.error("SO_BINDTODEVICE does not exist;"
1757
" cannot bind to interface %s",
1758
self.interface)
1759
else:
1760
try:
1761
self.socket.setsockopt(socket.SOL_SOCKET,
1762
SO_BINDTODEVICE,
1763
str(self.interface
1764
+ '\0'))
1765
except socket.error as error:
1766
if error[0] == errno.EPERM:
1767
logger.error("No permission to"
1768
" bind to interface %s",
1769
self.interface)
1770
elif error[0] == errno.ENOPROTOOPT:
1771
logger.error("SO_BINDTODEVICE not available;"
1772
" cannot bind to interface %s",
1773
self.interface)
1774
else:
1775
raise
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
544
try:
545
self.socket.setsockopt(socket.SOL_SOCKET,
546
SO_BINDTODEVICE,
547
self.settings["interface"])
548
except socket.error, error:
549
if error[0] == errno.EPERM:
550
logger.error(u"No permission to"
551
u" bind to interface %s",
552
self.settings["interface"])
553
else:
554
raise error
1776
555
# Only bind(2) the socket if we really need to.
1777
556
if self.server_address[0] or self.server_address[1]:
1778
557
if not self.server_address[0]:
1779
if self.address_family == socket.AF_INET6:
1780
any_address = "::" # in6addr_any
1781
else:
1782
any_address = socket.INADDR_ANY
1783
self.server_address = (any_address,
558
in6addr_any = "::"
559
self.server_address = (in6addr_any,
1784
560
self.server_address[1])
1785
561
elif not self.server_address[1]:
1786
562
self.server_address = (self.server_address[0],
1787
563
0)
1788
# if self.interface:
564
# if self.settings["interface"]:
1789
565
# self.server_address = (self.server_address[0],
1790
566
# 0, # port
1791
567
# 0, # flowinfo
1792
568
# if_nametoindex
1793
# (self.interface))
1794
return socketserver.TCPServer.server_bind(self)
1795
1796
1797
class MandosServer(IPv6_TCPServer):
1798
"""Mandos server.
1799
1800
Attributes:
1801
clients: set of Client objects
1802
gnutls_priority GnuTLS priority string
1803
use_dbus: Boolean; to emit D-Bus signals or not
1804
1805
Assumes a gobject.MainLoop event loop.
1806
"""
1807
def __init__(self, server_address, RequestHandlerClass,
1808
interface=None, use_ipv6=True, clients=None,
1809
gnutls_priority=None, use_dbus=True):
1810
self.enabled = False
1811
self.clients = clients
1812
if self.clients is None:
1813
self.clients = {}
1814
self.use_dbus = use_dbus
1815
self.gnutls_priority = gnutls_priority
1816
IPv6_TCPServer.__init__(self, server_address,
1817
RequestHandlerClass,
1818
interface = interface,
1819
use_ipv6 = use_ipv6)
569
# (self.settings
570
# ["interface"]))
571
return super(IPv6_TCPServer, self).server_bind()
1820
572
def server_activate(self):
1821
573
if self.enabled:
1822
return socketserver.TCPServer.server_activate(self)
1823
574
return super(IPv6_TCPServer, self).server_activate()
1824
575
def enable(self):
1825
576
self.enabled = True
1826
1827
def add_pipe(self, parent_pipe, proc):
1828
# Call "handle_ipc" for both data and EOF events
1829
gobject.io_add_watch(parent_pipe.fileno(),
1830
gobject.IO_IN | gobject.IO_HUP,
1831
functools.partial(self.handle_ipc,
1832
parent_pipe =
1833
parent_pipe,
1834
proc = proc))
1835
1836
def handle_ipc(self, source, condition, parent_pipe=None,
1837
proc = None, client_object=None):
1838
condition_names = {
1839
gobject.IO_IN: "IN", # There is data to read.
1840
gobject.IO_OUT: "OUT", # Data can be written (without
1841
# blocking).
1842
gobject.IO_PRI: "PRI", # There is urgent data to read.
1843
gobject.IO_ERR: "ERR", # Error condition.
1844
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1845
# broken, usually for pipes and
1846
# sockets).
1847
}
1848
conditions_string = ' | '.join(name
1849
for cond, name in
1850
condition_names.iteritems()
1851
if cond & condition)
1852
# error, or the other end of multiprocessing.Pipe has closed
1853
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1854
# Wait for other process to exit
1855
proc.join()
1856
return False
1857
1858
# Read a request from the child
1859
request = parent_pipe.recv()
1860
command = request[0]
1861
1862
if command == 'init':
1863
fpr = request[1]
1864
address = request[2]
1865
1866
for c in self.clients.itervalues():
1867
if c.fingerprint == fpr:
1868
client = c
1869
break
1870
else:
1871
logger.info("Client not found for fingerprint: %s, ad"
1872
"dress: %s", fpr, address)
1873
if self.use_dbus:
1874
# Emit D-Bus signal
1875
mandos_dbus_service.ClientNotFound(fpr,
1876
address[0])
1877
parent_pipe.send(False)
1878
return False
1879
1880
gobject.io_add_watch(parent_pipe.fileno(),
1881
gobject.IO_IN | gobject.IO_HUP,
1882
functools.partial(self.handle_ipc,
1883
parent_pipe =
1884
parent_pipe,
1885
proc = proc,
1886
client_object =
1887
client))
1888
parent_pipe.send(True)
1889
# remove the old hook in favor of the new above hook on
1890
# same fileno
1891
return False
1892
if command == 'funcall':
1893
funcname = request[1]
1894
args = request[2]
1895
kwargs = request[3]
1896
1897
parent_pipe.send(('data', getattr(client_object,
1898
funcname)(*args,
1899
**kwargs)))
1900
1901
if command == 'getattr':
1902
attrname = request[1]
1903
if callable(client_object.__getattribute__(attrname)):
1904
parent_pipe.send(('function',))
1905
else:
1906
parent_pipe.send(('data', client_object
1907
.__getattribute__(attrname)))
1908
1909
if command == 'setattr':
1910
attrname = request[1]
1911
value = request[2]
1912
setattr(client_object, attrname, value)
1913
1914
return True
1915
577
1916
578
1917
579
def string_to_delta(interval):
1918
580
"""Parse a string and return a datetime.timedelta
1919
581
1920
582
>>> string_to_delta('7d')
1921
583
datetime.timedelta(7)
1922
584
>>> string_to_delta('60s')
1925
587
datetime.timedelta(0, 3600)
1926
588
>>> string_to_delta('24h')
1927
589
datetime.timedelta(1)
1928
>>> string_to_delta('1w')
590
>>> string_to_delta(u'1w')
1929
591
datetime.timedelta(7)
1930
592
>>> string_to_delta('5m 30s')
1931
593
datetime.timedelta(0, 330)
1935
597
try:
1936
598
suffix = unicode(s[-1])
1937
599
value = int(s[:-1])
1938
if suffix == "d":
600
if suffix == u"d":
1939
601
delta = datetime.timedelta(value)
1940
elif suffix == "s":
602
elif suffix == u"s":
1941
603
delta = datetime.timedelta(0, value)
1942
elif suffix == "m":
604
elif suffix == u"m":
1943
605
delta = datetime.timedelta(0, 0, 0, 0, value)
1944
elif suffix == "h":
606
elif suffix == u"h":
1945
607
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1946
elif suffix == "w":
608
elif suffix == u"w":
1947
609
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1948
610
else:
1949
raise ValueError("Unknown suffix %r" % suffix)
1950
except (ValueError, IndexError) as e:
1951
raise ValueError(*(e.args))
611
raise ValueError
612
except (ValueError, IndexError):
613
raise ValueError
1952
614
timevalue += delta
1953
615
return timevalue
1954
616
1955
617
618
def server_state_changed(state):
619
"""Derived from the Avahi example code"""
620
if state == avahi.SERVER_COLLISION:
621
logger.error(u"Zeroconf server name collision")
622
service.remove()
623
elif state == avahi.SERVER_RUNNING:
624
service.add()
625
626
627
def entry_group_state_changed(state, error):
628
"""Derived from the Avahi example code"""
629
logger.debug(u"Avahi state change: %i", state)
630
631
if state == avahi.ENTRY_GROUP_ESTABLISHED:
632
logger.debug(u"Zeroconf service established.")
633
elif state == avahi.ENTRY_GROUP_COLLISION:
634
logger.warning(u"Zeroconf service name collision.")
635
service.rename()
636
elif state == avahi.ENTRY_GROUP_FAILURE:
637
logger.critical(u"Avahi: Error in group state changed %s",
638
unicode(error))
639
raise AvahiGroupError("State changed: %s", str(error))
640
641
def if_nametoindex(interface):
642
"""Call the C function if_nametoindex(), or equivalent"""
643
global if_nametoindex
644
try:
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
647
except (OSError, AttributeError):
648
if "struct" not in sys.modules:
649
import struct
650
if "fcntl" not in sys.modules:
651
import fcntl
652
def if_nametoindex(interface):
653
"Get an interface index the hard way, i.e. using fcntl()"
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
655
s = socket.socket()
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
658
s.close()
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
660
return interface_index
661
return if_nametoindex(interface)
662
663
1956
664
def daemon(nochdir = False, noclose = False):
1957
665
"""See daemon(3). Standard BSD Unix function.
1958
1959
666
This should really exist as os.daemon, but it doesn't (yet)."""
1960
667
if os.fork():
1961
668
sys.exit()
1969
676
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1970
677
if not stat.S_ISCHR(os.fstat(null).st_mode):
1971
678
raise OSError(errno.ENODEV,
1972
"%s not a character device"
1973
% os.path.devnull)
679
"/dev/null not a character device")
1974
680
os.dup2(null, sys.stdin.fileno())
1975
681
os.dup2(null, sys.stdout.fileno())
1976
682
os.dup2(null, sys.stderr.fileno())
1979
685
1980
686
1981
687
def main():
1982
1983
##################################################################
1984
# Parsing of options, both command line and config file
1985
1986
parser = argparse.ArgumentParser()
1987
parser.add_argument("-v", "--version", action="version",
1988
version = "%%(prog)s %s" % version,
1989
help="show version number and exit")
1990
parser.add_argument("-i", "--interface", metavar="IF",
1991
help="Bind to interface IF")
1992
parser.add_argument("-a", "--address",
1993
help="Address to listen for requests on")
1994
parser.add_argument("-p", "--port", type=int,
1995
help="Port number to receive requests on")
1996
parser.add_argument("--check", action="store_true",
1997
help="Run self-test")
1998
parser.add_argument("--debug", action="store_true",
1999
help="Debug mode; run in foreground and log"
2000
" to terminal")
2001
parser.add_argument("--debuglevel", metavar="LEVEL",
2002
help="Debug level for stdout output")
2003
parser.add_argument("--priority", help="GnuTLS"
2004
" priority string (see GnuTLS documentation)")
2005
parser.add_argument("--servicename",
2006
metavar="NAME", help="Zeroconf service name")
2007
parser.add_argument("--configdir",
2008
default="/etc/mandos", metavar="DIR",
2009
help="Directory to search for configuration"
2010
" files")
2011
parser.add_argument("--no-dbus", action="store_false",
2012
dest="use_dbus", help="Do not provide D-Bus"
2013
" system bus interface")
2014
parser.add_argument("--no-ipv6", action="store_false",
2015
dest="use_ipv6", help="Do not use IPv6")
2016
parser.add_argument("--no-restore", action="store_false",
2017
dest="restore", help="Do not restore stored"
2018
" state")
2019
parser.add_argument("--statedir", metavar="DIR",
2020
help="Directory to save/restore state in")
2021
2022
options = parser.parse_args()
688
parser = OptionParser(version = "%%prog %s" % version)
689
parser.add_option("-i", "--interface", type="string",
690
metavar="IF", help="Bind to interface IF")
691
parser.add_option("-a", "--address", type="string",
692
help="Address to listen for requests on")
693
parser.add_option("-p", "--port", type="int",
694
help="Port number to receive requests on")
695
parser.add_option("--check", action="store_true", default=False,
696
help="Run self-test")
697
parser.add_option("--debug", action="store_true",
698
help="Debug mode; run in foreground and log to"
699
" terminal")
700
parser.add_option("--priority", type="string", help="GnuTLS"
701
" priority string (see GnuTLS documentation)")
702
parser.add_option("--servicename", type="string", metavar="NAME",
703
help="Zeroconf service name")
704
parser.add_option("--configdir", type="string",
705
default="/etc/mandos", metavar="DIR",
706
help="Directory to search for configuration"
707
" files")
708
options = parser.parse_args()[0]
2023
709
2024
710
if options.check:
2025
711
import doctest
2034
720
"priority":
2035
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2036
722
"servicename": "Mandos",
2037
"use_dbus": "True",
2038
"use_ipv6": "True",
2039
"debuglevel": "",
2040
"restore": "True",
2041
"statedir": "/var/lib/mandos"
2042
723
}
2043
724
2044
725
# Parse config file for server-global settings
2045
server_config = configparser.SafeConfigParser(server_defaults)
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
2046
727
del server_defaults
2047
server_config.read(os.path.join(options.configdir,
2048
"mandos.conf"))
728
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2049
729
# Convert the SafeConfigParser object to a dict
2050
730
server_settings = server_config.defaults()
2051
# Use the appropriate methods on the non-string config options
2052
for option in ("debug", "use_dbus", "use_ipv6"):
2053
server_settings[option] = server_config.getboolean("DEFAULT",
2054
option)
2055
if server_settings["port"]:
2056
server_settings["port"] = server_config.getint("DEFAULT",
2057
"port")
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
733
("DEFAULT", "debug")
2058
734
del server_config
2059
735
2060
736
# Override the settings from the config file with command line
2061
737
# options, if set.
2062
738
for option in ("interface", "address", "port", "debug",
2063
"priority", "servicename", "configdir",
2064
"use_dbus", "use_ipv6", "debuglevel", "restore",
2065
"statedir"):
739
"priority", "servicename", "configdir"):
2066
740
value = getattr(options, option)
2067
741
if value is not None:
2068
742
server_settings[option] = value
2069
743
del options
2070
# Force all strings to be unicode
2071
for option in server_settings.keys():
2072
if type(server_settings[option]) is str:
2073
server_settings[option] = unicode(server_settings[option])
2074
744
# Now we have our good server settings in "server_settings"
2075
745
2076
##################################################################
2077
2078
# For convenience
2079
746
debug = server_settings["debug"]
2080
debuglevel = server_settings["debuglevel"]
2081
use_dbus = server_settings["use_dbus"]
2082
use_ipv6 = server_settings["use_ipv6"]
2083
stored_state_path = os.path.join(server_settings["statedir"],
2084
stored_state_file)
2085
747
2086
if debug:
2087
initlogger(debug, logging.DEBUG)
2088
else:
2089
if not debuglevel:
2090
initlogger(debug)
2091
else:
2092
level = getattr(logging, debuglevel.upper())
2093
initlogger(debug, level)
748
if not debug:
749
syslogger.setLevel(logging.WARNING)
750
console.setLevel(logging.WARNING)
2094
751
2095
752
if server_settings["servicename"] != "Mandos":
2096
syslogger.setFormatter(logging.Formatter
2097
('Mandos (%s) [%%(process)d]:'
2098
' %%(levelname)s: %%(message)s'
753
syslogger.setFormatter(logging.Formatter\
754
('Mandos (%s): %%(levelname)s:'
755
' %%(message)s'
2099
756
% server_settings["servicename"]))
2100
757
2101
758
# Parse config file with clients
2102
client_config = configparser.SafeConfigParser(Client
2103
.client_defaults)
759
client_defaults = { "timeout": "1h",
760
"interval": "5m",
761
"checker": "fping -q -- %(host)s",
762
"host": "",
763
}
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
2104
765
client_config.read(os.path.join(server_settings["configdir"],
2105
766
"clients.conf"))
2106
767
2107
global mandos_dbus_service
2108
mandos_dbus_service = None
2109
2110
tcp_server = MandosServer((server_settings["address"],
2111
server_settings["port"]),
2112
ClientHandler,
2113
interface=(server_settings["interface"]
2114
or None),
2115
use_ipv6=use_ipv6,
2116
gnutls_priority=
2117
server_settings["priority"],
2118
use_dbus=use_dbus)
2119
if not debug:
2120
pidfilename = "/var/run/mandos.pid"
2121
try:
2122
pidfile = open(pidfilename, "w")
2123
except IOError:
2124
logger.error("Could not open file %r", pidfilename)
2125
2126
try:
2127
uid = pwd.getpwnam("_mandos").pw_uid
2128
gid = pwd.getpwnam("_mandos").pw_gid
2129
except KeyError:
2130
try:
2131
uid = pwd.getpwnam("mandos").pw_uid
2132
gid = pwd.getpwnam("mandos").pw_gid
2133
except KeyError:
2134
try:
2135
uid = pwd.getpwnam("nobody").pw_uid
2136
gid = pwd.getpwnam("nobody").pw_gid
2137
except KeyError:
2138
uid = 65534
2139
gid = 65534
2140
try:
768
clients = Set()
769
tcp_server = IPv6_TCPServer((server_settings["address"],
770
server_settings["port"]),
771
TCP_handler,
772
settings=server_settings,
773
clients=clients)
774
pidfilename = "/var/run/mandos.pid"
775
try:
776
pidfile = open(pidfilename, "w")
777
except IOError, error:
778
logger.error("Could not open file %r", pidfilename)
779
780
uid = 65534
781
gid = 65534
782
try:
783
uid = pwd.getpwnam("mandos").pw_uid
784
except KeyError:
785
try:
786
uid = pwd.getpwnam("nobody").pw_uid
787
except KeyError:
788
pass
789
try:
790
gid = pwd.getpwnam("mandos").pw_gid
791
except KeyError:
792
try:
793
gid = pwd.getpwnam("nogroup").pw_gid
794
except KeyError:
795
pass
796
try:
797
os.setuid(uid)
2141
798
os.setgid(gid)
2142
os.setuid(uid)
2143
except OSError as error:
799
except OSError, error:
2144
800
if error[0] != errno.EPERM:
2145
801
raise error
2146
802
2147
if debug:
2148
# Enable all possible GnuTLS debugging
2149
2150
# "Use a log level over 10 to enable all debugging options."
2151
# - GnuTLS manual
2152
gnutls.library.functions.gnutls_global_set_log_level(11)
2153
2154
@gnutls.library.types.gnutls_log_func
2155
def debug_gnutls(level, string):
2156
logger.debug("GnuTLS: %s", string[:-1])
2157
2158
(gnutls.library.functions
2159
.gnutls_global_set_log_function(debug_gnutls))
2160
2161
# Redirect stdin so all checkers get /dev/null
2162
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2163
os.dup2(null, sys.stdin.fileno())
2164
if null > 2:
2165
os.close(null)
2166
2167
# Need to fork before connecting to D-Bus
2168
if not debug:
2169
# Close all input and output, do double fork, etc.
2170
daemon()
2171
2172
gobject.threads_init()
803
global service
804
service = AvahiService(name = server_settings["servicename"],
805
servicetype = "_mandos._tcp", )
806
if server_settings["interface"]:
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
2173
809
2174
810
global main_loop
811
global bus
812
global server
2175
813
# From the Avahi example code
2176
814
DBusGMainLoop(set_as_default=True )
2177
815
main_loop = gobject.MainLoop()
2178
816
bus = dbus.SystemBus()
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
2179
820
# End of Avahi example code
2180
if use_dbus:
2181
try:
2182
bus_name = dbus.service.BusName("se.recompile.Mandos",
2183
bus, do_not_queue=True)
2184
old_bus_name = (dbus.service.BusName
2185
("se.bsnet.fukt.Mandos", bus,
2186
do_not_queue=True))
2187
except dbus.exceptions.NameExistsException as e:
2188
logger.error(unicode(e) + ", disabling D-Bus")
2189
use_dbus = False
2190
server_settings["use_dbus"] = False
2191
tcp_server.use_dbus = False
2192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2193
service = AvahiServiceToSyslog(name =
2194
server_settings["servicename"],
2195
servicetype = "_mandos._tcp",
2196
protocol = protocol, bus = bus)
2197
if server_settings["interface"]:
2198
service.interface = (if_nametoindex
2199
(str(server_settings["interface"])))
2200
2201
global multiprocessing_manager
2202
multiprocessing_manager = multiprocessing.Manager()
2203
2204
client_class = Client
2205
if use_dbus:
2206
client_class = functools.partial(ClientDBusTransitional,
2207
bus = bus)
2208
2209
client_settings = Client.config_parser(client_config)
2210
old_client_settings = {}
2211
clients_data = {}
2212
2213
# Get client data and settings from last running state.
2214
if server_settings["restore"]:
2215
try:
2216
with open(stored_state_path, "rb") as stored_state:
2217
clients_data, old_client_settings = (pickle.load
2218
(stored_state))
2219
os.remove(stored_state_path)
2220
except IOError as e:
2221
logger.warning("Could not load persistent state: {0}"
2222
.format(e))
2223
if e.errno != errno.ENOENT:
2224
raise
2225
except EOFError as e:
2226
logger.warning("Could not load persistent state: "
2227
"EOFError: {0}".format(e))
2228
2229
with PGPEngine() as pgp:
2230
for client_name, client in clients_data.iteritems():
2231
# Decide which value to use after restoring saved state.
2232
# We have three different values: Old config file,
2233
# new config file, and saved state.
2234
# New config value takes precedence if it differs from old
2235
# config value, otherwise use saved state.
2236
for name, value in client_settings[client_name].items():
2237
try:
2238
# For each value in new config, check if it
2239
# differs from the old config value (Except for
2240
# the "secret" attribute)
2241
if (name != "secret" and
2242
value != old_client_settings[client_name]
2243
[name]):
2244
client[name] = value
2245
except KeyError:
2246
pass
2247
2248
# Clients who has passed its expire date can still be
2249
# enabled if its last checker was successful. Clients
2250
# whose checker succeeded before we stored its state is
2251
# assumed to have successfully run all checkers during
2252
# downtime.
2253
if client["enabled"]:
2254
if datetime.datetime.utcnow() >= client["expires"]:
2255
if not client["last_checked_ok"]:
2256
logger.warning(
2257
"disabling client {0} - Client never "
2258
"performed a successful checker"
2259
.format(client_name))
2260
client["enabled"] = False
2261
elif client["last_checker_status"] != 0:
2262
logger.warning(
2263
"disabling client {0} - Client "
2264
"last checker failed with error code {1}"
2265
.format(client_name,
2266
client["last_checker_status"]))
2267
client["enabled"] = False
2268
else:
2269
client["expires"] = (datetime.datetime
2270
.utcnow()
2271
+ client["timeout"])
2272
logger.debug("Last checker succeeded,"
2273
" keeping {0} enabled"
2274
.format(client_name))
2275
try:
2276
client["secret"] = (
2277
pgp.decrypt(client["encrypted_secret"],
2278
client_settings[client_name]
2279
["secret"]))
2280
except PGPError:
2281
# If decryption fails, we use secret from new settings
2282
logger.debug("Failed to decrypt {0} old secret"
2283
.format(client_name))
2284
client["secret"] = (
2285
client_settings[client_name]["secret"])
2286
2287
2288
# Add/remove clients based on new changes made to config
2289
for client_name in (set(old_client_settings)
2290
- set(client_settings)):
2291
del clients_data[client_name]
2292
for client_name in (set(client_settings)
2293
- set(old_client_settings)):
2294
clients_data[client_name] = client_settings[client_name]
2295
2296
# Create all client objects
2297
for client_name, client in clients_data.iteritems():
2298
tcp_server.clients[client_name] = client_class(
2299
name = client_name, settings = client)
2300
2301
if not tcp_server.clients:
2302
logger.warning("No clients defined")
821
822
def remove_from_clients(client):
823
clients.remove(client)
824
if not clients:
825
logger.critical(u"No clients left, exiting")
826
sys.exit()
827
828
clients.update(Set(Client(name = section,
829
stop_hook = remove_from_clients,
830
config
831
= dict(client_config.items(section)))
832
for section in client_config.sections()))
833
if not clients:
834
logger.critical(u"No clients defined")
835
sys.exit(1)
836
837
if debug:
838
# Redirect stdin so all checkers get /dev/null
839
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
840
os.dup2(null, sys.stdin.fileno())
841
if null > 2:
842
os.close(null)
843
else:
844
# No console logging
845
logger.removeHandler(console)
846
# Close all input and output, do double fork, etc.
847
daemon()
848
849
try:
850
pid = os.getpid()
851
pidfile.write(str(pid) + "\n")
852
pidfile.close()
853
del pidfile
854
except IOError:
855
logger.error(u"Could not write to file %r with PID %d",
856
pidfilename, pid)
857
except NameError:
858
# "pidfile" was never created
859
pass
860
del pidfilename
861
862
def cleanup():
863
"Cleanup function; run on exit"
864
global group
865
# From the Avahi example code
866
if not group is None:
867
group.Free()
868
group = None
869
# End of Avahi example code
2303
870
871
while clients:
872
client = clients.pop()
873
client.stop_hook = None
874
client.stop()
875
876
atexit.register(cleanup)
877
2304
878
if not debug:
2305
try:
2306
with pidfile:
2307
pid = os.getpid()
2308
pidfile.write(str(pid) + "\n".encode("utf-8"))
2309
del pidfile
2310
except IOError:
2311
logger.error("Could not write to file %r with PID %d",
2312
pidfilename, pid)
2313
except NameError:
2314
# "pidfile" was never created
2315
pass
2316
del pidfilename
2317
879
signal.signal(signal.SIGINT, signal.SIG_IGN)
2318
2319
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2320
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2321
882
2322
if use_dbus:
2323
class MandosDBusService(dbus.service.Object):
2324
"""A D-Bus proxy object"""
2325
def __init__(self):
2326
dbus.service.Object.__init__(self, bus, "/")
2327
_interface = "se.recompile.Mandos"
2328
2329
@dbus.service.signal(_interface, signature="o")
2330
def ClientAdded(self, objpath):
2331
"D-Bus signal"
2332
pass
2333
2334
@dbus.service.signal(_interface, signature="ss")
2335
def ClientNotFound(self, fingerprint, address):
2336
"D-Bus signal"
2337
pass
2338
2339
@dbus.service.signal(_interface, signature="os")
2340
def ClientRemoved(self, objpath, name):
2341
"D-Bus signal"
2342
pass
2343
2344
@dbus.service.method(_interface, out_signature="ao")
2345
def GetAllClients(self):
2346
"D-Bus method"
2347
return dbus.Array(c.dbus_object_path
2348
for c in
2349
tcp_server.clients.itervalues())
2350
2351
@dbus.service.method(_interface,
2352
out_signature="a{oa{sv}}")
2353
def GetAllClientsWithProperties(self):
2354
"D-Bus method"
2355
return dbus.Dictionary(
2356
((c.dbus_object_path, c.GetAll(""))
2357
for c in tcp_server.clients.itervalues()),
2358
signature="oa{sv}")
2359
2360
@dbus.service.method(_interface, in_signature="o")
2361
def RemoveClient(self, object_path):
2362
"D-Bus method"
2363
for c in tcp_server.clients.itervalues():
2364
if c.dbus_object_path == object_path:
2365
del tcp_server.clients[c.name]
2366
c.remove_from_connection()
2367
# Don't signal anything except ClientRemoved
2368
c.disable(quiet=True)
2369
# Emit D-Bus signal
2370
self.ClientRemoved(object_path, c.name)
2371
return
2372
raise KeyError(object_path)
2373
2374
del _interface
2375
2376
class MandosDBusServiceTransitional(MandosDBusService):
2377
__metaclass__ = AlternateDBusNamesMetaclass
2378
mandos_dbus_service = MandosDBusServiceTransitional()
2379
2380
def cleanup():
2381
"Cleanup function; run on exit"
2382
service.cleanup()
2383
2384
multiprocessing.active_children()
2385
if not (tcp_server.clients or client_settings):
2386
return
2387
2388
# Store client before exiting. Secrets are encrypted with key
2389
# based on what config file has. If config file is
2390
# removed/edited, old secret will thus be unrecovable.
2391
clients = {}
2392
with PGPEngine() as pgp:
2393
for client in tcp_server.clients.itervalues():
2394
key = client_settings[client.name]["secret"]
2395
client.encrypted_secret = pgp.encrypt(client.secret,
2396
key)
2397
client_dict = {}
2398
2399
# A list of attributes that can not be pickled
2400
# + secret.
2401
exclude = set(("bus", "changedstate", "secret",
2402
"checker"))
2403
for name, typ in (inspect.getmembers
2404
(dbus.service.Object)):
2405
exclude.add(name)
2406
2407
client_dict["encrypted_secret"] = (client
2408
.encrypted_secret)
2409
for attr in client.client_structure:
2410
if attr not in exclude:
2411
client_dict[attr] = getattr(client, attr)
2412
2413
clients[client.name] = client_dict
2414
del client_settings[client.name]["secret"]
2415
2416
try:
2417
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2418
prefix="clients-",
2419
dir=os.path.dirname
2420
(stored_state_path))
2421
with os.fdopen(tempfd, "wb") as stored_state:
2422
pickle.dump((clients, client_settings), stored_state)
2423
os.rename(tempname, stored_state_path)
2424
except (IOError, OSError) as e:
2425
logger.warning("Could not save persistent state: {0}"
2426
.format(e))
2427
if not debug:
2428
try:
2429
os.remove(tempname)
2430
except NameError:
2431
pass
2432
if e.errno not in set((errno.ENOENT, errno.EACCES,
2433
errno.EEXIST)):
2434
raise e
2435
2436
# Delete all clients, and settings from config
2437
while tcp_server.clients:
2438
name, client = tcp_server.clients.popitem()
2439
if use_dbus:
2440
client.remove_from_connection()
2441
# Don't signal anything except ClientRemoved
2442
client.disable(quiet=True)
2443
if use_dbus:
2444
# Emit D-Bus signal
2445
mandos_dbus_service.ClientRemoved(client
2446
.dbus_object_path,
2447
client.name)
2448
client_settings.clear()
2449
2450
atexit.register(cleanup)
2451
2452
for client in tcp_server.clients.itervalues():
2453
if use_dbus:
2454
# Emit D-Bus signal
2455
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2456
# Need to initiate checking of clients
2457
if client.enabled:
2458
client.init_checker()
883
for client in clients:
884
client.start()
2459
885
2460
886
tcp_server.enable()
2461
887
tcp_server.server_activate()
2462
888
2463
889
# Find out what port we got
2464
890
service.port = tcp_server.socket.getsockname()[1]
2465
if use_ipv6:
2466
logger.info("Now listening on address %r, port %d,"
2467
" flowinfo %d, scope_id %d"
2468
% tcp_server.socket.getsockname())
2469
else: # IPv4
2470
logger.info("Now listening on address %r, port %d"
2471
% tcp_server.socket.getsockname())
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
2472
893
2473
894
#service.interface = tcp_server.socket.getsockname()[3]
2474
895
2475
896
try:
2476
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
2477
899
try:
2478
service.activate()
2479
except dbus.exceptions.DBusException as error:
2480
logger.critical("DBusException: %s", error)
2481
cleanup()
900
server_state_changed(server.GetState())
901
except dbus.exceptions.DBusException, error:
902
logger.critical(u"DBusException: %s", error)
2482
903
sys.exit(1)
2483
904
# End of Avahi example code
2484
905
2485
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2486
907
lambda *args, **kwargs:
2487
(tcp_server.handle_request
2488
(*args[2:], **kwargs) or True))
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
2489
910
2490
logger.debug("Starting main loop")
911
logger.debug(u"Starting main loop")
2491
912
main_loop.run()
2492
except AvahiError as error:
2493
logger.critical("AvahiError: %s", error)
2494
cleanup()
913
except AvahiError, error:
914
logger.critical(u"AvahiError: %s" + unicode(error))
2495
915
sys.exit(1)
2496
916
except KeyboardInterrupt:
2497
917
if debug:
2498
print("", file=sys.stderr)
2499
logger.debug("Server received KeyboardInterrupt")
2500
logger.debug("Server exiting")
2501
# Must run before the D-Bus bus name gets deregistered
2502
cleanup()
918
print
2503
919
2504
920
if __name__ == '__main__':
2505
921
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0