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- Committer: Björn Påhlsson
- Date: 2008-08-10 00:07:55 UTC
- mfrom: (57 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 58.
- Revision ID: belorn@braxen-20080810000755-8njs8ag58cos29rh
merge
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
import SocketServer as socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
38
35
import socket
39
import argparse
36
import select
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
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
import itertools
69
57
70
58
import dbus
71
import dbus.service
72
59
import gobject
73
60
import avahi
74
61
from dbus.mainloop.glib import DBusGMainLoop
75
62
import ctypes
76
import ctypes.util
77
import xml.dom.minidom
78
import inspect
79
import GnuPGInterface
80
81
try:
82
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
83
except AttributeError:
84
try:
85
from IN import SO_BINDTODEVICE
86
except ImportError:
87
SO_BINDTODEVICE = None
88
89
version = "1.5.3"
90
stored_state_file = "clients.pickle"
91
92
logger = logging.getLogger()
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(debug, level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
119
' %(message)s'))
120
logger.addHandler(syslogger)
121
122
if debug:
123
console = logging.StreamHandler()
124
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
125
' [%(process)d]:'
126
' %(levelname)s:'
127
' %(message)s'))
128
logger.addHandler(console)
129
logger.setLevel(level)
130
131
132
class PGPError(Exception):
133
"""Exception if encryption/decryption fails"""
134
pass
135
136
137
class PGPEngine(object):
138
"""A simple class for OpenPGP symmetric encryption & decryption"""
139
def __init__(self):
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
142
self.gnupg = GnuPGInterface.GnuPG()
143
self.gnupg.options.meta_interactive = False
144
self.gnupg.options.homedir = self.tempdir
145
self.gnupg.options.extra_args.extend(['--force-mdc',
146
'--quiet',
147
'--no-use-agent'])
148
149
def __enter__(self):
150
return self
151
152
def __exit__ (self, exc_type, exc_value, traceback):
153
self._cleanup()
154
return False
155
156
def __del__(self):
157
self._cleanup()
158
159
def _cleanup(self):
160
if self.tempdir is not None:
161
# Delete contents of tempdir
162
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
164
for filename in files:
165
os.remove(os.path.join(root, filename))
166
for dirname in dirs:
167
os.rmdir(os.path.join(root, dirname))
168
# Remove tempdir
169
os.rmdir(self.tempdir)
170
self.tempdir = None
171
172
def password_encode(self, password):
173
# Passphrase can not be empty and can not contain newlines or
174
# NUL bytes. So we prefix it and hex encode it.
175
return b"mandos" + binascii.hexlify(password)
176
177
def encrypt(self, data, password):
178
self.gnupg.passphrase = self.password_encode(password)
179
with open(os.devnull, "w") as devnull:
180
try:
181
proc = self.gnupg.run(['--symmetric'],
182
create_fhs=['stdin', 'stdout'],
183
attach_fhs={'stderr': devnull})
184
with contextlib.closing(proc.handles['stdin']) as f:
185
f.write(data)
186
with contextlib.closing(proc.handles['stdout']) as f:
187
ciphertext = f.read()
188
proc.wait()
189
except IOError as e:
190
raise PGPError(e)
191
self.gnupg.passphrase = None
192
return ciphertext
193
194
def decrypt(self, data, password):
195
self.gnupg.passphrase = self.password_encode(password)
196
with open(os.devnull, "w") as devnull:
197
try:
198
proc = self.gnupg.run(['--decrypt'],
199
create_fhs=['stdin', 'stdout'],
200
attach_fhs={'stderr': devnull})
201
with contextlib.closing(proc.handles['stdin']) as f:
202
f.write(data)
203
with contextlib.closing(proc.handles['stdout']) as f:
204
decrypted_plaintext = f.read()
205
proc.wait()
206
except IOError as e:
207
raise PGPError(e)
208
self.gnupg.passphrase = None
209
return decrypted_plaintext
210
63
64
version = "1.0"
65
66
logger = logging.Logger('mandos')
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
72
logger.addHandler(syslogger)
211
73
212
74
213
75
class AvahiError(Exception):
214
def __init__(self, value, *args, **kwargs):
76
def __init__(self, value):
215
77
self.value = value
216
super(AvahiError, self).__init__(value, *args, **kwargs)
217
def __unicode__(self):
218
return unicode(repr(self.value))
78
def __str__(self):
79
return repr(self.value)
219
80
220
81
class AvahiServiceError(AvahiError):
221
82
pass
226
87
227
88
class AvahiService(object):
228
89
"""An Avahi (Zeroconf) service.
229
230
90
Attributes:
231
91
interface: integer; avahi.IF_UNSPEC or an interface index.
232
92
Used to optionally bind to the specified interface.
240
100
max_renames: integer; maximum number of renames
241
101
rename_count: integer; counter so we only rename after collisions
242
102
a sensible number of times
243
group: D-Bus Entry Group
244
server: D-Bus Server
245
bus: dbus.SystemBus()
246
103
"""
247
104
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
248
servicetype = None, port = None, TXT = None,
249
domain = "", host = "", max_renames = 32768,
250
protocol = avahi.PROTO_UNSPEC, bus = None):
105
type = None, port = None, TXT = None, domain = "",
106
host = "", max_renames = 32768):
251
107
self.interface = interface
252
108
self.name = name
253
self.type = servicetype
109
self.type = type
254
110
self.port = port
255
self.TXT = TXT if TXT is not None else []
111
if TXT is None:
112
self.TXT = []
113
else:
114
self.TXT = TXT
256
115
self.domain = domain
257
116
self.host = host
258
117
self.rename_count = 0
259
self.max_renames = max_renames
260
self.protocol = protocol
261
self.group = None # our entry group
262
self.server = None
263
self.bus = bus
264
self.entry_group_state_changed_match = None
265
118
def rename(self):
266
119
"""Derived from the Avahi example code"""
267
120
if self.rename_count >= self.max_renames:
268
logger.critical("No suitable Zeroconf service name found"
269
" after %i retries, exiting.",
270
self.rename_count)
121
logger.critical(u"No suitable service name found after %i"
122
u" retries, exiting.", rename_count)
271
123
raise AvahiServiceError("Too many renames")
272
self.name = unicode(self.server
273
.GetAlternativeServiceName(self.name))
274
logger.info("Changing Zeroconf service name to %r ...",
275
self.name)
124
name = server.GetAlternativeServiceName(name)
125
logger.error(u"Changing name to %r ...", name)
126
syslogger.setFormatter(logging.Formatter\
127
('Mandos (%s): %%(levelname)s:'
128
' %%(message)s' % name))
276
129
self.remove()
277
try:
278
self.add()
279
except dbus.exceptions.DBusException as error:
280
logger.critical("D-Bus Exception", exc_info=error)
281
self.cleanup()
282
os._exit(1)
130
self.add()
283
131
self.rename_count += 1
284
132
def remove(self):
285
133
"""Derived from the Avahi example code"""
286
if self.entry_group_state_changed_match is not None:
287
self.entry_group_state_changed_match.remove()
288
self.entry_group_state_changed_match = None
289
if self.group is not None:
290
self.group.Reset()
134
if group is not None:
135
group.Reset()
291
136
def add(self):
292
137
"""Derived from the Avahi example code"""
293
self.remove()
294
if self.group is None:
295
self.group = dbus.Interface(
296
self.bus.get_object(avahi.DBUS_NAME,
297
self.server.EntryGroupNew()),
298
avahi.DBUS_INTERFACE_ENTRY_GROUP)
299
self.entry_group_state_changed_match = (
300
self.group.connect_to_signal(
301
'StateChanged', self.entry_group_state_changed))
302
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
303
self.name, self.type)
304
self.group.AddService(
305
self.interface,
306
self.protocol,
307
dbus.UInt32(0), # flags
308
self.name, self.type,
309
self.domain, self.host,
310
dbus.UInt16(self.port),
311
avahi.string_array_to_txt_array(self.TXT))
312
self.group.Commit()
313
def entry_group_state_changed(self, state, error):
314
"""Derived from the Avahi example code"""
315
logger.debug("Avahi entry group state change: %i", state)
316
317
if state == avahi.ENTRY_GROUP_ESTABLISHED:
318
logger.debug("Zeroconf service established.")
319
elif state == avahi.ENTRY_GROUP_COLLISION:
320
logger.info("Zeroconf service name collision.")
321
self.rename()
322
elif state == avahi.ENTRY_GROUP_FAILURE:
323
logger.critical("Avahi: Error in group state changed %s",
324
unicode(error))
325
raise AvahiGroupError("State changed: {0!s}"
326
.format(error))
327
def cleanup(self):
328
"""Derived from the Avahi example code"""
329
if self.group is not None:
330
try:
331
self.group.Free()
332
except (dbus.exceptions.UnknownMethodException,
333
dbus.exceptions.DBusException):
334
pass
335
self.group = None
336
self.remove()
337
def server_state_changed(self, state, error=None):
338
"""Derived from the Avahi example code"""
339
logger.debug("Avahi server state change: %i", state)
340
bad_states = { avahi.SERVER_INVALID:
341
"Zeroconf server invalid",
342
avahi.SERVER_REGISTERING: None,
343
avahi.SERVER_COLLISION:
344
"Zeroconf server name collision",
345
avahi.SERVER_FAILURE:
346
"Zeroconf server failure" }
347
if state in bad_states:
348
if bad_states[state] is not None:
349
if error is None:
350
logger.error(bad_states[state])
351
else:
352
logger.error(bad_states[state] + ": %r", error)
353
self.cleanup()
354
elif state == avahi.SERVER_RUNNING:
355
self.add()
356
else:
357
if error is None:
358
logger.debug("Unknown state: %r", state)
359
else:
360
logger.debug("Unknown state: %r: %r", state, error)
361
def activate(self):
362
"""Derived from the Avahi example code"""
363
if self.server is None:
364
self.server = dbus.Interface(
365
self.bus.get_object(avahi.DBUS_NAME,
366
avahi.DBUS_PATH_SERVER,
367
follow_name_owner_changes=True),
368
avahi.DBUS_INTERFACE_SERVER)
369
self.server.connect_to_signal("StateChanged",
370
self.server_state_changed)
371
self.server_state_changed(self.server.GetState())
372
373
class AvahiServiceToSyslog(AvahiService):
374
def rename(self):
375
"""Add the new name to the syslog messages"""
376
ret = AvahiService.rename(self)
377
syslogger.setFormatter(logging.Formatter
378
('Mandos ({0}) [%(process)d]:'
379
' %(levelname)s: %(message)s'
380
.format(self.name)))
381
return ret
382
383
def timedelta_to_milliseconds(td):
384
"Convert a datetime.timedelta() to milliseconds"
385
return ((td.days * 24 * 60 * 60 * 1000)
386
+ (td.seconds * 1000)
387
+ (td.microseconds // 1000))
388
138
global group
139
if group is None:
140
group = dbus.Interface\
141
(bus.get_object(avahi.DBUS_NAME,
142
server.EntryGroupNew()),
143
avahi.DBUS_INTERFACE_ENTRY_GROUP)
144
group.connect_to_signal('StateChanged',
145
entry_group_state_changed)
146
logger.debug(u"Adding service '%s' of type '%s' ...",
147
service.name, service.type)
148
group.AddService(
149
self.interface, # interface
150
avahi.PROTO_INET6, # protocol
151
dbus.UInt32(0), # flags
152
self.name, self.type,
153
self.domain, self.host,
154
dbus.UInt16(self.port),
155
avahi.string_array_to_txt_array(self.TXT))
156
group.Commit()
157
158
# From the Avahi example code:
159
group = None # our entry group
160
# End of Avahi example code
161
162
389
163
class Client(object):
390
164
"""A representation of a client host served by this server.
391
392
165
Attributes:
393
approved: bool(); 'None' if not yet approved/disapproved
394
approval_delay: datetime.timedelta(); Time to wait for approval
395
approval_duration: datetime.timedelta(); Duration of one approval
396
checker: subprocess.Popen(); a running checker process used
397
to see if the client lives.
398
'None' if no process is running.
399
checker_callback_tag: a gobject event source tag, or None
400
checker_command: string; External command which is run to check
401
if client lives. %() expansions are done at
166
name: string; from the config file, used in log messages
167
fingerprint: string (40 or 32 hexadecimal digits); used to
168
uniquely identify the client
169
secret: bytestring; sent verbatim (over TLS) to client
170
host: string; available for use by the checker command
171
created: datetime.datetime(); object creation, not client host
172
last_checked_ok: datetime.datetime() or None if not yet checked OK
173
timeout: datetime.timedelta(); How long from last_checked_ok
174
until this client is invalid
175
interval: datetime.timedelta(); How often to start a new checker
176
stop_hook: If set, called by stop() as stop_hook(self)
177
checker: subprocess.Popen(); a running checker process used
178
to see if the client lives.
179
'None' if no process is running.
180
checker_initiator_tag: a gobject event source tag, or None
181
stop_initiator_tag: - '' -
182
checker_callback_tag: - '' -
183
checker_command: string; External command which is run to check if
184
client lives. %() expansions are done at
402
185
runtime with vars(self) as dict, so that for
403
186
instance %(name)s can be used in the command.
404
checker_initiator_tag: a gobject event source tag, or None
405
created: datetime.datetime(); (UTC) object creation
406
client_structure: Object describing what attributes a client has
407
and is used for storing the client at exit
408
current_checker_command: string; current running checker_command
409
disable_initiator_tag: a gobject event source tag, or None
410
enabled: bool()
411
fingerprint: string (40 or 32 hexadecimal digits); used to
412
uniquely identify the client
413
host: string; available for use by the checker command
414
interval: datetime.timedelta(); How often to start a new checker
415
last_approval_request: datetime.datetime(); (UTC) or None
416
last_checked_ok: datetime.datetime(); (UTC) or None
417
last_checker_status: integer between 0 and 255 reflecting exit
418
status of last checker. -1 reflects crashed
419
checker, -2 means no checker completed yet.
420
last_enabled: datetime.datetime(); (UTC) or None
421
name: string; from the config file, used in log messages and
422
D-Bus identifiers
423
secret: bytestring; sent verbatim (over TLS) to client
424
timeout: datetime.timedelta(); How long from last_checked_ok
425
until this client is disabled
426
extended_timeout: extra long timeout when secret has been sent
427
runtime_expansions: Allowed attributes for runtime expansion.
428
expires: datetime.datetime(); time (UTC) when a client will be
429
disabled, or None
187
Private attibutes:
188
_timeout: Real variable for 'timeout'
189
_interval: Real variable for 'interval'
190
_timeout_milliseconds: Used when calling gobject.timeout_add()
191
_interval_milliseconds: - '' -
430
192
"""
431
432
runtime_expansions = ("approval_delay", "approval_duration",
433
"created", "enabled", "fingerprint",
434
"host", "interval", "last_checked_ok",
435
"last_enabled", "name", "timeout")
436
client_defaults = { "timeout": "5m",
437
"extended_timeout": "15m",
438
"interval": "2m",
439
"checker": "fping -q -- %%(host)s",
440
"host": "",
441
"approval_delay": "0s",
442
"approval_duration": "1s",
443
"approved_by_default": "True",
444
"enabled": "True",
445
}
446
447
def timeout_milliseconds(self):
448
"Return the 'timeout' attribute in milliseconds"
449
return timedelta_to_milliseconds(self.timeout)
450
451
def extended_timeout_milliseconds(self):
452
"Return the 'extended_timeout' attribute in milliseconds"
453
return timedelta_to_milliseconds(self.extended_timeout)
454
455
def interval_milliseconds(self):
456
"Return the 'interval' attribute in milliseconds"
457
return timedelta_to_milliseconds(self.interval)
458
459
def approval_delay_milliseconds(self):
460
return timedelta_to_milliseconds(self.approval_delay)
461
462
@staticmethod
463
def config_parser(config):
464
"""Construct a new dict of client settings of this form:
465
{ client_name: {setting_name: value, ...}, ...}
466
with exceptions for any special settings as defined above.
467
NOTE: Must be a pure function. Must return the same result
468
value given the same arguments.
469
"""
470
settings = {}
471
for client_name in config.sections():
472
section = dict(config.items(client_name))
473
client = settings[client_name] = {}
474
475
client["host"] = section["host"]
476
# Reformat values from string types to Python types
477
client["approved_by_default"] = config.getboolean(
478
client_name, "approved_by_default")
479
client["enabled"] = config.getboolean(client_name,
480
"enabled")
481
482
client["fingerprint"] = (section["fingerprint"].upper()
483
.replace(" ", ""))
484
if "secret" in section:
485
client["secret"] = section["secret"].decode("base64")
486
elif "secfile" in section:
487
with open(os.path.expanduser(os.path.expandvars
488
(section["secfile"])),
489
"rb") as secfile:
490
client["secret"] = secfile.read()
491
else:
492
raise TypeError("No secret or secfile for section {0}"
493
.format(section))
494
client["timeout"] = string_to_delta(section["timeout"])
495
client["extended_timeout"] = string_to_delta(
496
section["extended_timeout"])
497
client["interval"] = string_to_delta(section["interval"])
498
client["approval_delay"] = string_to_delta(
499
section["approval_delay"])
500
client["approval_duration"] = string_to_delta(
501
section["approval_duration"])
502
client["checker_command"] = section["checker"]
503
client["last_approval_request"] = None
504
client["last_checked_ok"] = None
505
client["last_checker_status"] = -2
506
507
return settings
508
509
510
def __init__(self, settings, name = None):
193
def _set_timeout(self, timeout):
194
"Setter function for 'timeout' attribute"
195
self._timeout = timeout
196
self._timeout_milliseconds = ((self.timeout.days
197
* 24 * 60 * 60 * 1000)
198
+ (self.timeout.seconds * 1000)
199
+ (self.timeout.microseconds
200
// 1000))
201
timeout = property(lambda self: self._timeout,
202
_set_timeout)
203
del _set_timeout
204
def _set_interval(self, interval):
205
"Setter function for 'interval' attribute"
206
self._interval = interval
207
self._interval_milliseconds = ((self.interval.days
208
* 24 * 60 * 60 * 1000)
209
+ (self.interval.seconds
210
* 1000)
211
+ (self.interval.microseconds
212
// 1000))
213
interval = property(lambda self: self._interval,
214
_set_interval)
215
del _set_interval
216
def __init__(self, name = None, stop_hook=None, config={}):
511
217
"""Note: the 'checker' key in 'config' sets the
512
218
'checker_command' attribute and *not* the 'checker'
513
219
attribute."""
514
220
self.name = name
515
# adding all client settings
516
for setting, value in settings.iteritems():
517
setattr(self, setting, value)
518
519
if self.enabled:
520
if not hasattr(self, "last_enabled"):
521
self.last_enabled = datetime.datetime.utcnow()
522
if not hasattr(self, "expires"):
523
self.expires = (datetime.datetime.utcnow()
524
+ self.timeout)
525
else:
526
self.last_enabled = None
527
self.expires = None
528
529
logger.debug("Creating client %r", self.name)
221
logger.debug(u"Creating client %r", self.name)
530
222
# Uppercase and remove spaces from fingerprint for later
531
223
# comparison purposes with return value from the fingerprint()
532
224
# function
533
logger.debug(" Fingerprint: %s", self.fingerprint)
534
self.created = settings.get("created",
535
datetime.datetime.utcnow())
536
537
# attributes specific for this server instance
225
self.fingerprint = config["fingerprint"].upper()\
226
.replace(u" ", u"")
227
logger.debug(u" Fingerprint: %s", self.fingerprint)
228
if "secret" in config:
229
self.secret = config["secret"].decode(u"base64")
230
elif "secfile" in config:
231
sf = open(config["secfile"])
232
self.secret = sf.read()
233
sf.close()
234
else:
235
raise TypeError(u"No secret or secfile for client %s"
236
% self.name)
237
self.host = config.get("host", "")
238
self.created = datetime.datetime.now()
239
self.last_checked_ok = None
240
self.timeout = string_to_delta(config["timeout"])
241
self.interval = string_to_delta(config["interval"])
242
self.stop_hook = stop_hook
538
243
self.checker = None
539
244
self.checker_initiator_tag = None
540
self.disable_initiator_tag = None
245
self.stop_initiator_tag = None
541
246
self.checker_callback_tag = None
542
self.current_checker_command = None
543
self.approved = None
544
self.approvals_pending = 0
545
self.changedstate = (multiprocessing_manager
546
.Condition(multiprocessing_manager
547
.Lock()))
548
self.client_structure = [attr for attr in
549
self.__dict__.iterkeys()
550
if not attr.startswith("_")]
551
self.client_structure.append("client_structure")
552
553
for name, t in inspect.getmembers(type(self),
554
lambda obj:
555
isinstance(obj,
556
property)):
557
if not name.startswith("_"):
558
self.client_structure.append(name)
559
560
# Send notice to process children that client state has changed
561
def send_changedstate(self):
562
with self.changedstate:
563
self.changedstate.notify_all()
564
565
def enable(self):
247
self.check_command = config["checker"]
248
def start(self):
566
249
"""Start this client's checker and timeout hooks"""
567
if getattr(self, "enabled", False):
568
# Already enabled
569
return
570
self.send_changedstate()
571
self.expires = datetime.datetime.utcnow() + self.timeout
572
self.enabled = True
573
self.last_enabled = datetime.datetime.utcnow()
574
self.init_checker()
575
576
def disable(self, quiet=True):
577
"""Disable this client."""
578
if not getattr(self, "enabled", False):
250
# Schedule a new checker to be started an 'interval' from now,
251
# and every interval from then on.
252
self.checker_initiator_tag = gobject.timeout_add\
253
(self._interval_milliseconds,
254
self.start_checker)
255
# Also start a new checker *right now*.
256
self.start_checker()
257
# Schedule a stop() when 'timeout' has passed
258
self.stop_initiator_tag = gobject.timeout_add\
259
(self._timeout_milliseconds,
260
self.stop)
261
def stop(self):
262
"""Stop this client.
263
The possibility that a client might be restarted is left open,
264
but not currently used."""
265
# If this client doesn't have a secret, it is already stopped.
266
if hasattr(self, "secret") and self.secret:
267
logger.info(u"Stopping client %s", self.name)
268
self.secret = None
269
else:
579
270
return False
580
if not quiet:
581
self.send_changedstate()
582
if not quiet:
583
logger.info("Disabling client %s", self.name)
584
if getattr(self, "disable_initiator_tag", False):
585
gobject.source_remove(self.disable_initiator_tag)
586
self.disable_initiator_tag = None
587
self.expires = None
271
if getattr(self, "stop_initiator_tag", False):
272
gobject.source_remove(self.stop_initiator_tag)
273
self.stop_initiator_tag = None
588
274
if getattr(self, "checker_initiator_tag", False):
589
275
gobject.source_remove(self.checker_initiator_tag)
590
276
self.checker_initiator_tag = None
591
277
self.stop_checker()
592
self.enabled = False
278
if self.stop_hook:
279
self.stop_hook(self)
593
280
# Do not run this again if called by a gobject.timeout_add
594
281
return False
595
596
282
def __del__(self):
597
self.disable()
598
599
def init_checker(self):
600
# Schedule a new checker to be started an 'interval' from now,
601
# and every interval from then on.
602
self.checker_initiator_tag = (gobject.timeout_add
603
(self.interval_milliseconds(),
604
self.start_checker))
605
# Schedule a disable() when 'timeout' has passed
606
self.disable_initiator_tag = (gobject.timeout_add
607
(self.timeout_milliseconds(),
608
self.disable))
609
# Also start a new checker *right now*.
610
self.start_checker()
611
612
def checker_callback(self, pid, condition, command):
283
self.stop_hook = None
284
self.stop()
285
def checker_callback(self, pid, condition):
613
286
"""The checker has completed, so take appropriate actions."""
287
now = datetime.datetime.now()
614
288
self.checker_callback_tag = None
615
289
self.checker = None
616
if os.WIFEXITED(condition):
617
self.last_checker_status = os.WEXITSTATUS(condition)
618
if self.last_checker_status == 0:
619
logger.info("Checker for %(name)s succeeded",
620
vars(self))
621
self.checked_ok()
622
else:
623
logger.info("Checker for %(name)s failed",
624
vars(self))
625
else:
626
self.last_checker_status = -1
627
logger.warning("Checker for %(name)s crashed?",
290
if os.WIFEXITED(condition) \
291
and (os.WEXITSTATUS(condition) == 0):
292
logger.info(u"Checker for %(name)s succeeded",
293
vars(self))
294
self.last_checked_ok = now
295
gobject.source_remove(self.stop_initiator_tag)
296
self.stop_initiator_tag = gobject.timeout_add\
297
(self._timeout_milliseconds,
298
self.stop)
299
elif not os.WIFEXITED(condition):
300
logger.warning(u"Checker for %(name)s crashed?",
628
301
vars(self))
629
630
def checked_ok(self):
631
"""Assert that the client has been seen, alive and well."""
632
self.last_checked_ok = datetime.datetime.utcnow()
633
self.last_checker_status = 0
634
self.bump_timeout()
635
636
def bump_timeout(self, timeout=None):
637
"""Bump up the timeout for this client."""
638
if timeout is None:
639
timeout = self.timeout
640
if self.disable_initiator_tag is not None:
641
gobject.source_remove(self.disable_initiator_tag)
642
if getattr(self, "enabled", False):
643
self.disable_initiator_tag = (gobject.timeout_add
644
(timedelta_to_milliseconds
645
(timeout), self.disable))
646
self.expires = datetime.datetime.utcnow() + timeout
647
648
def need_approval(self):
649
self.last_approval_request = datetime.datetime.utcnow()
650
302
else:
303
logger.info(u"Checker for %(name)s failed",
304
vars(self))
651
305
def start_checker(self):
652
306
"""Start a new checker subprocess if one is not running.
653
654
307
If a checker already exists, leave it running and do
655
308
nothing."""
656
309
# The reason for not killing a running checker is that if we
659
312
# client would inevitably timeout, since no checker would get
660
313
# a chance to run to completion. If we instead leave running
661
314
# checkers alone, the checker would have to take more time
662
# than 'timeout' for the client to be disabled, which is as it
663
# should be.
664
665
# If a checker exists, make sure it is not a zombie
666
try:
667
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
668
except (AttributeError, OSError) as error:
669
if (isinstance(error, OSError)
670
and error.errno != errno.ECHILD):
671
raise error
672
else:
673
if pid:
674
logger.warning("Checker was a zombie")
675
gobject.source_remove(self.checker_callback_tag)
676
self.checker_callback(pid, status,
677
self.current_checker_command)
678
# Start a new checker if needed
315
# than 'timeout' for the client to be declared invalid, which
316
# is as it should be.
679
317
if self.checker is None:
680
318
try:
681
# In case checker_command has exactly one % operator
682
command = self.checker_command % self.host
319
# In case check_command has exactly one % operator
320
command = self.check_command % self.host
683
321
except TypeError:
684
322
# Escape attributes for the shell
685
escaped_attrs = dict(
686
(attr,
687
re.escape(unicode(str(getattr(self, attr, "")),
688
errors=
689
'replace')))
690
for attr in
691
self.runtime_expansions)
692
323
escaped_attrs = dict((key, re.escape(str(val)))
324
for key, val in
325
vars(self).iteritems())
693
326
try:
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
327
command = self.check_command % escaped_attrs
328
except TypeError, error:
329
logger.error(u'Could not format string "%s":'
330
u' %s', self.check_command, error)
698
331
return True # Try again later
699
self.current_checker_command = command
700
332
try:
701
logger.info("Starting checker %r for %s",
333
logger.info(u"Starting checker %r for %s",
702
334
command, self.name)
703
# We don't need to redirect stdout and stderr, since
704
# in normal mode, that is already done by daemon(),
705
# and in debug mode we don't want to. (Stdin is
706
# always replaced by /dev/null.)
707
335
self.checker = subprocess.Popen(command,
708
336
close_fds=True,
709
337
shell=True, cwd="/")
710
self.checker_callback_tag = (gobject.child_watch_add
711
(self.checker.pid,
712
self.checker_callback,
713
data=command))
714
# The checker may have completed before the gobject
715
# watch was added. Check for this.
716
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
717
if pid:
718
gobject.source_remove(self.checker_callback_tag)
719
self.checker_callback(pid, status, command)
720
except OSError as error:
721
logger.error("Failed to start subprocess",
722
exc_info=error)
338
self.checker_callback_tag = gobject.child_watch_add\
339
(self.checker.pid,
340
self.checker_callback)
341
except subprocess.OSError, error:
342
logger.error(u"Failed to start subprocess: %s",
343
error)
723
344
# Re-run this periodically if run by gobject.timeout_add
724
345
return True
725
726
346
def stop_checker(self):
727
347
"""Force the checker process, if any, to stop."""
728
348
if self.checker_callback_tag:
730
350
self.checker_callback_tag = None
731
351
if getattr(self, "checker", None) is None:
732
352
return
733
logger.debug("Stopping checker for %(name)s", vars(self))
353
logger.debug(u"Stopping checker for %(name)s", vars(self))
734
354
try:
735
self.checker.terminate()
736
#time.sleep(0.5)
355
os.kill(self.checker.pid, signal.SIGTERM)
356
#os.sleep(0.5)
737
357
#if self.checker.poll() is None:
738
# self.checker.kill()
739
except OSError as error:
358
# os.kill(self.checker.pid, signal.SIGKILL)
359
except OSError, error:
740
360
if error.errno != errno.ESRCH: # No such process
741
361
raise
742
362
self.checker = None
743
744
745
def dbus_service_property(dbus_interface, signature="v",
746
access="readwrite", byte_arrays=False):
747
"""Decorators for marking methods of a DBusObjectWithProperties to
748
become properties on the D-Bus.
749
750
The decorated method will be called with no arguments by "Get"
751
and with one argument by "Set".
752
753
The parameters, where they are supported, are the same as
754
dbus.service.method, except there is only "signature", since the
755
type from Get() and the type sent to Set() is the same.
756
"""
757
# Encoding deeply encoded byte arrays is not supported yet by the
758
# "Set" method, so we fail early here:
759
if byte_arrays and signature != "ay":
760
raise ValueError("Byte arrays not supported for non-'ay'"
761
" signature {0!r}".format(signature))
762
def decorator(func):
763
func._dbus_is_property = True
764
func._dbus_interface = dbus_interface
765
func._dbus_signature = signature
766
func._dbus_access = access
767
func._dbus_name = func.__name__
768
if func._dbus_name.endswith("_dbus_property"):
769
func._dbus_name = func._dbus_name[:-14]
770
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
771
return func
772
return decorator
773
774
775
def dbus_interface_annotations(dbus_interface):
776
"""Decorator for marking functions returning interface annotations.
777
778
Usage:
779
780
@dbus_interface_annotations("org.example.Interface")
781
def _foo(self): # Function name does not matter
782
return {"org.freedesktop.DBus.Deprecated": "true",
783
"org.freedesktop.DBus.Property.EmitsChangedSignal":
784
"false"}
785
"""
786
def decorator(func):
787
func._dbus_is_interface = True
788
func._dbus_interface = dbus_interface
789
func._dbus_name = dbus_interface
790
return func
791
return decorator
792
793
794
def dbus_annotations(annotations):
795
"""Decorator to annotate D-Bus methods, signals or properties
796
Usage:
797
798
@dbus_service_property("org.example.Interface", signature="b",
799
access="r")
800
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property."
802
"EmitsChangedSignal": "false"})
803
def Property_dbus_property(self):
804
return dbus.Boolean(False)
805
"""
806
def decorator(func):
807
func._dbus_annotations = annotations
808
return func
809
return decorator
810
811
812
class DBusPropertyException(dbus.exceptions.DBusException):
813
"""A base class for D-Bus property-related exceptions
814
"""
815
def __unicode__(self):
816
return unicode(str(self))
817
818
819
class DBusPropertyAccessException(DBusPropertyException):
820
"""A property's access permissions disallows an operation.
821
"""
822
pass
823
824
825
class DBusPropertyNotFound(DBusPropertyException):
826
"""An attempt was made to access a non-existing property.
827
"""
828
pass
829
830
831
class DBusObjectWithProperties(dbus.service.Object):
832
"""A D-Bus object with properties.
833
834
Classes inheriting from this can use the dbus_service_property
835
decorator to expose methods as D-Bus properties. It exposes the
836
standard Get(), Set(), and GetAll() methods on the D-Bus.
837
"""
838
839
@staticmethod
840
def _is_dbus_thing(thing):
841
"""Returns a function testing if an attribute is a D-Bus thing
842
843
If called like _is_dbus_thing("method") it returns a function
844
suitable for use as predicate to inspect.getmembers().
845
"""
846
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
847
False)
848
849
def _get_all_dbus_things(self, thing):
850
"""Returns a generator of (name, attribute) pairs
851
"""
852
return ((getattr(athing.__get__(self), "_dbus_name",
853
name),
854
athing.__get__(self))
855
for cls in self.__class__.__mro__
856
for name, athing in
857
inspect.getmembers(cls,
858
self._is_dbus_thing(thing)))
859
860
def _get_dbus_property(self, interface_name, property_name):
861
"""Returns a bound method if one exists which is a D-Bus
862
property with the specified name and interface.
863
"""
864
for cls in self.__class__.__mro__:
865
for name, value in (inspect.getmembers
866
(cls,
867
self._is_dbus_thing("property"))):
868
if (value._dbus_name == property_name
869
and value._dbus_interface == interface_name):
870
return value.__get__(self)
871
872
# No such property
873
raise DBusPropertyNotFound(self.dbus_object_path + ":"
874
+ interface_name + "."
875
+ property_name)
876
877
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
878
out_signature="v")
879
def Get(self, interface_name, property_name):
880
"""Standard D-Bus property Get() method, see D-Bus standard.
881
"""
882
prop = self._get_dbus_property(interface_name, property_name)
883
if prop._dbus_access == "write":
884
raise DBusPropertyAccessException(property_name)
885
value = prop()
886
if not hasattr(value, "variant_level"):
887
return value
888
return type(value)(value, variant_level=value.variant_level+1)
889
890
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
891
def Set(self, interface_name, property_name, value):
892
"""Standard D-Bus property Set() method, see D-Bus standard.
893
"""
894
prop = self._get_dbus_property(interface_name, property_name)
895
if prop._dbus_access == "read":
896
raise DBusPropertyAccessException(property_name)
897
if prop._dbus_get_args_options["byte_arrays"]:
898
# The byte_arrays option is not supported yet on
899
# signatures other than "ay".
900
if prop._dbus_signature != "ay":
901
raise ValueError
902
value = dbus.ByteArray(b''.join(chr(byte)
903
for byte in value))
904
prop(value)
905
906
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
907
out_signature="a{sv}")
908
def GetAll(self, interface_name):
909
"""Standard D-Bus property GetAll() method, see D-Bus
910
standard.
911
912
Note: Will not include properties with access="write".
913
"""
914
properties = {}
915
for name, prop in self._get_all_dbus_things("property"):
916
if (interface_name
917
and interface_name != prop._dbus_interface):
918
# Interface non-empty but did not match
919
continue
920
# Ignore write-only properties
921
if prop._dbus_access == "write":
922
continue
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
properties[name] = value
926
continue
927
properties[name] = type(value)(value, variant_level=
928
value.variant_level+1)
929
return dbus.Dictionary(properties, signature="sv")
930
931
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
932
out_signature="s",
933
path_keyword='object_path',
934
connection_keyword='connection')
935
def Introspect(self, object_path, connection):
936
"""Overloading of standard D-Bus method.
937
938
Inserts property tags and interface annotation tags.
939
"""
940
xmlstring = dbus.service.Object.Introspect(self, object_path,
941
connection)
942
try:
943
document = xml.dom.minidom.parseString(xmlstring)
944
def make_tag(document, name, prop):
945
e = document.createElement("property")
946
e.setAttribute("name", name)
947
e.setAttribute("type", prop._dbus_signature)
948
e.setAttribute("access", prop._dbus_access)
949
return e
950
for if_tag in document.getElementsByTagName("interface"):
951
# Add property tags
952
for tag in (make_tag(document, name, prop)
953
for name, prop
954
in self._get_all_dbus_things("property")
955
if prop._dbus_interface
956
== if_tag.getAttribute("name")):
957
if_tag.appendChild(tag)
958
# Add annotation tags
959
for typ in ("method", "signal", "property"):
960
for tag in if_tag.getElementsByTagName(typ):
961
annots = dict()
962
for name, prop in (self.
963
_get_all_dbus_things(typ)):
964
if (name == tag.getAttribute("name")
965
and prop._dbus_interface
966
== if_tag.getAttribute("name")):
967
annots.update(getattr
968
(prop,
969
"_dbus_annotations",
970
{}))
971
for name, value in annots.iteritems():
972
ann_tag = document.createElement(
973
"annotation")
974
ann_tag.setAttribute("name", name)
975
ann_tag.setAttribute("value", value)
976
tag.appendChild(ann_tag)
977
# Add interface annotation tags
978
for annotation, value in dict(
979
itertools.chain(
980
*(annotations().iteritems()
981
for name, annotations in
982
self._get_all_dbus_things("interface")
983
if name == if_tag.getAttribute("name")
984
))).iteritems():
985
ann_tag = document.createElement("annotation")
986
ann_tag.setAttribute("name", annotation)
987
ann_tag.setAttribute("value", value)
988
if_tag.appendChild(ann_tag)
989
# Add the names to the return values for the
990
# "org.freedesktop.DBus.Properties" methods
991
if (if_tag.getAttribute("name")
992
== "org.freedesktop.DBus.Properties"):
993
for cn in if_tag.getElementsByTagName("method"):
994
if cn.getAttribute("name") == "Get":
995
for arg in cn.getElementsByTagName("arg"):
996
if (arg.getAttribute("direction")
997
== "out"):
998
arg.setAttribute("name", "value")
999
elif cn.getAttribute("name") == "GetAll":
1000
for arg in cn.getElementsByTagName("arg"):
1001
if (arg.getAttribute("direction")
1002
== "out"):
1003
arg.setAttribute("name", "props")
1004
xmlstring = document.toxml("utf-8")
1005
document.unlink()
1006
except (AttributeError, xml.dom.DOMException,
1007
xml.parsers.expat.ExpatError) as error:
1008
logger.error("Failed to override Introspection method",
1009
exc_info=error)
1010
return xmlstring
1011
1012
1013
def datetime_to_dbus (dt, variant_level=0):
1014
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1015
if dt is None:
1016
return dbus.String("", variant_level = variant_level)
1017
return dbus.String(dt.isoformat(),
1018
variant_level=variant_level)
1019
1020
1021
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
1022
.__metaclass__):
1023
"""Applied to an empty subclass of a D-Bus object, this metaclass
1024
will add additional D-Bus attributes matching a certain pattern.
1025
"""
1026
def __new__(mcs, name, bases, attr):
1027
# Go through all the base classes which could have D-Bus
1028
# methods, signals, or properties in them
1029
old_interface_names = []
1030
for base in (b for b in bases
1031
if issubclass(b, dbus.service.Object)):
1032
# Go though all attributes of the base class
1033
for attrname, attribute in inspect.getmembers(base):
1034
# Ignore non-D-Bus attributes, and D-Bus attributes
1035
# with the wrong interface name
1036
if (not hasattr(attribute, "_dbus_interface")
1037
or not attribute._dbus_interface
1038
.startswith("se.recompile.Mandos")):
1039
continue
1040
# Create an alternate D-Bus interface name based on
1041
# the current name
1042
alt_interface = (attribute._dbus_interface
1043
.replace("se.recompile.Mandos",
1044
"se.bsnet.fukt.Mandos"))
1045
if alt_interface != attribute._dbus_interface:
1046
old_interface_names.append(alt_interface)
1047
# Is this a D-Bus signal?
1048
if getattr(attribute, "_dbus_is_signal", False):
1049
# Extract the original non-method function by
1050
# black magic
1051
nonmethod_func = (dict(
1052
zip(attribute.func_code.co_freevars,
1053
attribute.__closure__))["func"]
1054
.cell_contents)
1055
# Create a new, but exactly alike, function
1056
# object, and decorate it to be a new D-Bus signal
1057
# with the alternate D-Bus interface name
1058
new_function = (dbus.service.signal
1059
(alt_interface,
1060
attribute._dbus_signature)
1061
(types.FunctionType(
1062
nonmethod_func.func_code,
1063
nonmethod_func.func_globals,
1064
nonmethod_func.func_name,
1065
nonmethod_func.func_defaults,
1066
nonmethod_func.func_closure)))
1067
# Copy annotations, if any
1068
try:
1069
new_function._dbus_annotations = (
1070
dict(attribute._dbus_annotations))
1071
except AttributeError:
1072
pass
1073
# Define a creator of a function to call both the
1074
# old and new functions, so both the old and new
1075
# signals gets sent when the function is called
1076
def fixscope(func1, func2):
1077
"""This function is a scope container to pass
1078
func1 and func2 to the "call_both" function
1079
outside of its arguments"""
1080
def call_both(*args, **kwargs):
1081
"""This function will emit two D-Bus
1082
signals by calling func1 and func2"""
1083
func1(*args, **kwargs)
1084
func2(*args, **kwargs)
1085
return call_both
1086
# Create the "call_both" function and add it to
1087
# the class
1088
attr[attrname] = fixscope(attribute,
1089
new_function)
1090
# Is this a D-Bus method?
1091
elif getattr(attribute, "_dbus_is_method", False):
1092
# Create a new, but exactly alike, function
1093
# object. Decorate it to be a new D-Bus method
1094
# with the alternate D-Bus interface name. Add it
1095
# to the class.
1096
attr[attrname] = (dbus.service.method
1097
(alt_interface,
1098
attribute._dbus_in_signature,
1099
attribute._dbus_out_signature)
1100
(types.FunctionType
1101
(attribute.func_code,
1102
attribute.func_globals,
1103
attribute.func_name,
1104
attribute.func_defaults,
1105
attribute.func_closure)))
1106
# Copy annotations, if any
1107
try:
1108
attr[attrname]._dbus_annotations = (
1109
dict(attribute._dbus_annotations))
1110
except AttributeError:
1111
pass
1112
# Is this a D-Bus property?
1113
elif getattr(attribute, "_dbus_is_property", False):
1114
# Create a new, but exactly alike, function
1115
# object, and decorate it to be a new D-Bus
1116
# property with the alternate D-Bus interface
1117
# name. Add it to the class.
1118
attr[attrname] = (dbus_service_property
1119
(alt_interface,
1120
attribute._dbus_signature,
1121
attribute._dbus_access,
1122
attribute
1123
._dbus_get_args_options
1124
["byte_arrays"])
1125
(types.FunctionType
1126
(attribute.func_code,
1127
attribute.func_globals,
1128
attribute.func_name,
1129
attribute.func_defaults,
1130
attribute.func_closure)))
1131
# Copy annotations, if any
1132
try:
1133
attr[attrname]._dbus_annotations = (
1134
dict(attribute._dbus_annotations))
1135
except AttributeError:
1136
pass
1137
# Is this a D-Bus interface?
1138
elif getattr(attribute, "_dbus_is_interface", False):
1139
# Create a new, but exactly alike, function
1140
# object. Decorate it to be a new D-Bus interface
1141
# with the alternate D-Bus interface name. Add it
1142
# to the class.
1143
attr[attrname] = (dbus_interface_annotations
1144
(alt_interface)
1145
(types.FunctionType
1146
(attribute.func_code,
1147
attribute.func_globals,
1148
attribute.func_name,
1149
attribute.func_defaults,
1150
attribute.func_closure)))
1151
# Deprecate all old interfaces
1152
basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"
1153
for old_interface_name in old_interface_names:
1154
@dbus_interface_annotations(old_interface_name)
1155
def func(self):
1156
return { "org.freedesktop.DBus.Deprecated": "true" }
1157
# Find an unused name
1158
for aname in (basename.format(i) for i in
1159
itertools.count()):
1160
if aname not in attr:
1161
attr[aname] = func
1162
break
1163
return type.__new__(mcs, name, bases, attr)
1164
1165
1166
class ClientDBus(Client, DBusObjectWithProperties):
1167
"""A Client class using D-Bus
1168
1169
Attributes:
1170
dbus_object_path: dbus.ObjectPath
1171
bus: dbus.SystemBus()
1172
"""
1173
1174
runtime_expansions = (Client.runtime_expansions
1175
+ ("dbus_object_path",))
1176
1177
# dbus.service.Object doesn't use super(), so we can't either.
1178
1179
def __init__(self, bus = None, *args, **kwargs):
1180
self.bus = bus
1181
Client.__init__(self, *args, **kwargs)
1182
# Only now, when this client is initialized, can it show up on
1183
# the D-Bus
1184
client_object_name = unicode(self.name).translate(
1185
{ord("."): ord("_"),
1186
ord("-"): ord("_")})
1187
self.dbus_object_path = (dbus.ObjectPath
1188
("/clients/" + client_object_name))
1189
DBusObjectWithProperties.__init__(self, self.bus,
1190
self.dbus_object_path)
1191
1192
def notifychangeproperty(transform_func,
1193
dbus_name, type_func=lambda x: x,
1194
variant_level=1):
1195
""" Modify a variable so that it's a property which announces
1196
its changes to DBus.
1197
1198
transform_fun: Function that takes a value and a variant_level
1199
and transforms it to a D-Bus type.
1200
dbus_name: D-Bus name of the variable
1201
type_func: Function that transform the value before sending it
1202
to the D-Bus. Default: no transform
1203
variant_level: D-Bus variant level. Default: 1
1204
"""
1205
attrname = "_{0}".format(dbus_name)
1206
def setter(self, value):
1207
if hasattr(self, "dbus_object_path"):
1208
if (not hasattr(self, attrname) or
1209
type_func(getattr(self, attrname, None))
1210
!= type_func(value)):
1211
dbus_value = transform_func(type_func(value),
1212
variant_level
1213
=variant_level)
1214
self.PropertyChanged(dbus.String(dbus_name),
1215
dbus_value)
1216
setattr(self, attrname, value)
1217
1218
return property(lambda self: getattr(self, attrname), setter)
1219
1220
1221
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1222
approvals_pending = notifychangeproperty(dbus.Boolean,
1223
"ApprovalPending",
1224
type_func = bool)
1225
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1226
last_enabled = notifychangeproperty(datetime_to_dbus,
1227
"LastEnabled")
1228
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1229
type_func = lambda checker:
1230
checker is not None)
1231
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1232
"LastCheckedOK")
1233
last_checker_status = notifychangeproperty(dbus.Int16,
1234
"LastCheckerStatus")
1235
last_approval_request = notifychangeproperty(
1236
datetime_to_dbus, "LastApprovalRequest")
1237
approved_by_default = notifychangeproperty(dbus.Boolean,
1238
"ApprovedByDefault")
1239
approval_delay = notifychangeproperty(dbus.UInt64,
1240
"ApprovalDelay",
1241
type_func =
1242
timedelta_to_milliseconds)
1243
approval_duration = notifychangeproperty(
1244
dbus.UInt64, "ApprovalDuration",
1245
type_func = timedelta_to_milliseconds)
1246
host = notifychangeproperty(dbus.String, "Host")
1247
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1248
type_func =
1249
timedelta_to_milliseconds)
1250
extended_timeout = notifychangeproperty(
1251
dbus.UInt64, "ExtendedTimeout",
1252
type_func = timedelta_to_milliseconds)
1253
interval = notifychangeproperty(dbus.UInt64,
1254
"Interval",
1255
type_func =
1256
timedelta_to_milliseconds)
1257
checker_command = notifychangeproperty(dbus.String, "Checker")
1258
1259
del notifychangeproperty
1260
1261
def __del__(self, *args, **kwargs):
1262
try:
1263
self.remove_from_connection()
1264
except LookupError:
1265
pass
1266
if hasattr(DBusObjectWithProperties, "__del__"):
1267
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1268
Client.__del__(self, *args, **kwargs)
1269
1270
def checker_callback(self, pid, condition, command,
1271
*args, **kwargs):
1272
self.checker_callback_tag = None
1273
self.checker = None
1274
if os.WIFEXITED(condition):
1275
exitstatus = os.WEXITSTATUS(condition)
1276
# Emit D-Bus signal
1277
self.CheckerCompleted(dbus.Int16(exitstatus),
1278
dbus.Int64(condition),
1279
dbus.String(command))
1280
else:
1281
# Emit D-Bus signal
1282
self.CheckerCompleted(dbus.Int16(-1),
1283
dbus.Int64(condition),
1284
dbus.String(command))
1285
1286
return Client.checker_callback(self, pid, condition, command,
1287
*args, **kwargs)
1288
1289
def start_checker(self, *args, **kwargs):
1290
old_checker = self.checker
1291
if self.checker is not None:
1292
old_checker_pid = self.checker.pid
1293
else:
1294
old_checker_pid = None
1295
r = Client.start_checker(self, *args, **kwargs)
1296
# Only if new checker process was started
1297
if (self.checker is not None
1298
and old_checker_pid != self.checker.pid):
1299
# Emit D-Bus signal
1300
self.CheckerStarted(self.current_checker_command)
1301
return r
1302
1303
def _reset_approved(self):
1304
self.approved = None
1305
return False
1306
1307
def approve(self, value=True):
1308
self.send_changedstate()
1309
self.approved = value
1310
gobject.timeout_add(timedelta_to_milliseconds
1311
(self.approval_duration),
1312
self._reset_approved)
1313
1314
1315
## D-Bus methods, signals & properties
1316
_interface = "se.recompile.Mandos.Client"
1317
1318
## Interfaces
1319
1320
@dbus_interface_annotations(_interface)
1321
def _foo(self):
1322
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1323
"false"}
1324
1325
## Signals
1326
1327
# CheckerCompleted - signal
1328
@dbus.service.signal(_interface, signature="nxs")
1329
def CheckerCompleted(self, exitcode, waitstatus, command):
1330
"D-Bus signal"
1331
pass
1332
1333
# CheckerStarted - signal
1334
@dbus.service.signal(_interface, signature="s")
1335
def CheckerStarted(self, command):
1336
"D-Bus signal"
1337
pass
1338
1339
# PropertyChanged - signal
1340
@dbus.service.signal(_interface, signature="sv")
1341
def PropertyChanged(self, property, value):
1342
"D-Bus signal"
1343
pass
1344
1345
# GotSecret - signal
1346
@dbus.service.signal(_interface)
1347
def GotSecret(self):
1348
"""D-Bus signal
1349
Is sent after a successful transfer of secret from the Mandos
1350
server to mandos-client
1351
"""
1352
pass
1353
1354
# Rejected - signal
1355
@dbus.service.signal(_interface, signature="s")
1356
def Rejected(self, reason):
1357
"D-Bus signal"
1358
pass
1359
1360
# NeedApproval - signal
1361
@dbus.service.signal(_interface, signature="tb")
1362
def NeedApproval(self, timeout, default):
1363
"D-Bus signal"
1364
return self.need_approval()
1365
1366
## Methods
1367
1368
# Approve - method
1369
@dbus.service.method(_interface, in_signature="b")
1370
def Approve(self, value):
1371
self.approve(value)
1372
1373
# CheckedOK - method
1374
@dbus.service.method(_interface)
1375
def CheckedOK(self):
1376
self.checked_ok()
1377
1378
# Enable - method
1379
@dbus.service.method(_interface)
1380
def Enable(self):
1381
"D-Bus method"
1382
self.enable()
1383
1384
# StartChecker - method
1385
@dbus.service.method(_interface)
1386
def StartChecker(self):
1387
"D-Bus method"
1388
self.start_checker()
1389
1390
# Disable - method
1391
@dbus.service.method(_interface)
1392
def Disable(self):
1393
"D-Bus method"
1394
self.disable()
1395
1396
# StopChecker - method
1397
@dbus.service.method(_interface)
1398
def StopChecker(self):
1399
self.stop_checker()
1400
1401
## Properties
1402
1403
# ApprovalPending - property
1404
@dbus_service_property(_interface, signature="b", access="read")
1405
def ApprovalPending_dbus_property(self):
1406
return dbus.Boolean(bool(self.approvals_pending))
1407
1408
# ApprovedByDefault - property
1409
@dbus_service_property(_interface, signature="b",
1410
access="readwrite")
1411
def ApprovedByDefault_dbus_property(self, value=None):
1412
if value is None: # get
1413
return dbus.Boolean(self.approved_by_default)
1414
self.approved_by_default = bool(value)
1415
1416
# ApprovalDelay - property
1417
@dbus_service_property(_interface, signature="t",
1418
access="readwrite")
1419
def ApprovalDelay_dbus_property(self, value=None):
1420
if value is None: # get
1421
return dbus.UInt64(self.approval_delay_milliseconds())
1422
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1423
1424
# ApprovalDuration - property
1425
@dbus_service_property(_interface, signature="t",
1426
access="readwrite")
1427
def ApprovalDuration_dbus_property(self, value=None):
1428
if value is None: # get
1429
return dbus.UInt64(timedelta_to_milliseconds(
1430
self.approval_duration))
1431
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1432
1433
# Name - property
1434
@dbus_service_property(_interface, signature="s", access="read")
1435
def Name_dbus_property(self):
1436
return dbus.String(self.name)
1437
1438
# Fingerprint - property
1439
@dbus_service_property(_interface, signature="s", access="read")
1440
def Fingerprint_dbus_property(self):
1441
return dbus.String(self.fingerprint)
1442
1443
# Host - property
1444
@dbus_service_property(_interface, signature="s",
1445
access="readwrite")
1446
def Host_dbus_property(self, value=None):
1447
if value is None: # get
1448
return dbus.String(self.host)
1449
self.host = unicode(value)
1450
1451
# Created - property
1452
@dbus_service_property(_interface, signature="s", access="read")
1453
def Created_dbus_property(self):
1454
return datetime_to_dbus(self.created)
1455
1456
# LastEnabled - property
1457
@dbus_service_property(_interface, signature="s", access="read")
1458
def LastEnabled_dbus_property(self):
1459
return datetime_to_dbus(self.last_enabled)
1460
1461
# Enabled - property
1462
@dbus_service_property(_interface, signature="b",
1463
access="readwrite")
1464
def Enabled_dbus_property(self, value=None):
1465
if value is None: # get
1466
return dbus.Boolean(self.enabled)
1467
if value:
1468
self.enable()
1469
else:
1470
self.disable()
1471
1472
# LastCheckedOK - property
1473
@dbus_service_property(_interface, signature="s",
1474
access="readwrite")
1475
def LastCheckedOK_dbus_property(self, value=None):
1476
if value is not None:
1477
self.checked_ok()
1478
return
1479
return datetime_to_dbus(self.last_checked_ok)
1480
1481
# LastCheckerStatus - property
1482
@dbus_service_property(_interface, signature="n",
1483
access="read")
1484
def LastCheckerStatus_dbus_property(self):
1485
return dbus.Int16(self.last_checker_status)
1486
1487
# Expires - property
1488
@dbus_service_property(_interface, signature="s", access="read")
1489
def Expires_dbus_property(self):
1490
return datetime_to_dbus(self.expires)
1491
1492
# LastApprovalRequest - property
1493
@dbus_service_property(_interface, signature="s", access="read")
1494
def LastApprovalRequest_dbus_property(self):
1495
return datetime_to_dbus(self.last_approval_request)
1496
1497
# Timeout - property
1498
@dbus_service_property(_interface, signature="t",
1499
access="readwrite")
1500
def Timeout_dbus_property(self, value=None):
1501
if value is None: # get
1502
return dbus.UInt64(self.timeout_milliseconds())
1503
self.timeout = datetime.timedelta(0, 0, 0, value)
1504
# Reschedule timeout
1505
if self.enabled:
1506
now = datetime.datetime.utcnow()
1507
time_to_die = timedelta_to_milliseconds(
1508
(self.last_checked_ok + self.timeout) - now)
1509
if time_to_die <= 0:
1510
# The timeout has passed
1511
self.disable()
1512
else:
1513
self.expires = (now +
1514
datetime.timedelta(milliseconds =
1515
time_to_die))
1516
if (getattr(self, "disable_initiator_tag", None)
1517
is None):
1518
return
1519
gobject.source_remove(self.disable_initiator_tag)
1520
self.disable_initiator_tag = (gobject.timeout_add
1521
(time_to_die,
1522
self.disable))
1523
1524
# ExtendedTimeout - property
1525
@dbus_service_property(_interface, signature="t",
1526
access="readwrite")
1527
def ExtendedTimeout_dbus_property(self, value=None):
1528
if value is None: # get
1529
return dbus.UInt64(self.extended_timeout_milliseconds())
1530
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1531
1532
# Interval - property
1533
@dbus_service_property(_interface, signature="t",
1534
access="readwrite")
1535
def Interval_dbus_property(self, value=None):
1536
if value is None: # get
1537
return dbus.UInt64(self.interval_milliseconds())
1538
self.interval = datetime.timedelta(0, 0, 0, value)
1539
if getattr(self, "checker_initiator_tag", None) is None:
1540
return
1541
if self.enabled:
1542
# Reschedule checker run
1543
gobject.source_remove(self.checker_initiator_tag)
1544
self.checker_initiator_tag = (gobject.timeout_add
1545
(value, self.start_checker))
1546
self.start_checker() # Start one now, too
1547
1548
# Checker - property
1549
@dbus_service_property(_interface, signature="s",
1550
access="readwrite")
1551
def Checker_dbus_property(self, value=None):
1552
if value is None: # get
1553
return dbus.String(self.checker_command)
1554
self.checker_command = unicode(value)
1555
1556
# CheckerRunning - property
1557
@dbus_service_property(_interface, signature="b",
1558
access="readwrite")
1559
def CheckerRunning_dbus_property(self, value=None):
1560
if value is None: # get
1561
return dbus.Boolean(self.checker is not None)
1562
if value:
1563
self.start_checker()
1564
else:
1565
self.stop_checker()
1566
1567
# ObjectPath - property
1568
@dbus_service_property(_interface, signature="o", access="read")
1569
def ObjectPath_dbus_property(self):
1570
return self.dbus_object_path # is already a dbus.ObjectPath
1571
1572
# Secret = property
1573
@dbus_service_property(_interface, signature="ay",
1574
access="write", byte_arrays=True)
1575
def Secret_dbus_property(self, value):
1576
self.secret = str(value)
1577
1578
del _interface
1579
1580
1581
class ProxyClient(object):
1582
def __init__(self, child_pipe, fpr, address):
1583
self._pipe = child_pipe
1584
self._pipe.send(('init', fpr, address))
1585
if not self._pipe.recv():
1586
raise KeyError()
1587
1588
def __getattribute__(self, name):
1589
if name == '_pipe':
1590
return super(ProxyClient, self).__getattribute__(name)
1591
self._pipe.send(('getattr', name))
1592
data = self._pipe.recv()
1593
if data[0] == 'data':
1594
return data[1]
1595
if data[0] == 'function':
1596
def func(*args, **kwargs):
1597
self._pipe.send(('funcall', name, args, kwargs))
1598
return self._pipe.recv()[1]
1599
return func
1600
1601
def __setattr__(self, name, value):
1602
if name == '_pipe':
1603
return super(ProxyClient, self).__setattr__(name, value)
1604
self._pipe.send(('setattr', name, value))
1605
1606
1607
class ClientDBusTransitional(ClientDBus):
1608
__metaclass__ = AlternateDBusNamesMetaclass
1609
1610
1611
class ClientHandler(socketserver.BaseRequestHandler, object):
1612
"""A class to handle client connections.
1613
1614
Instantiated once for each connection to handle it.
363
def still_valid(self):
364
"""Has the timeout not yet passed for this client?"""
365
now = datetime.datetime.now()
366
if self.last_checked_ok is None:
367
return now < (self.created + self.timeout)
368
else:
369
return now < (self.last_checked_ok + self.timeout)
370
371
372
def peer_certificate(session):
373
"Return the peer's OpenPGP certificate as a bytestring"
374
# If not an OpenPGP certificate...
375
if gnutls.library.functions.gnutls_certificate_type_get\
376
(session._c_object) \
377
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
378
# ...do the normal thing
379
return session.peer_certificate
380
list_size = ctypes.c_uint()
381
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
382
(session._c_object, ctypes.byref(list_size))
383
if list_size.value == 0:
384
return None
385
cert = cert_list[0]
386
return ctypes.string_at(cert.data, cert.size)
387
388
389
def fingerprint(openpgp):
390
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
391
# New GnuTLS "datum" with the OpenPGP public key
392
datum = gnutls.library.types.gnutls_datum_t\
393
(ctypes.cast(ctypes.c_char_p(openpgp),
394
ctypes.POINTER(ctypes.c_ubyte)),
395
ctypes.c_uint(len(openpgp)))
396
# New empty GnuTLS certificate
397
crt = gnutls.library.types.gnutls_openpgp_crt_t()
398
gnutls.library.functions.gnutls_openpgp_crt_init\
399
(ctypes.byref(crt))
400
# Import the OpenPGP public key into the certificate
401
gnutls.library.functions.gnutls_openpgp_crt_import\
402
(crt, ctypes.byref(datum),
403
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
404
# New buffer for the fingerprint
405
buffer = ctypes.create_string_buffer(20)
406
buffer_length = ctypes.c_size_t()
407
# Get the fingerprint from the certificate into the buffer
408
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
409
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
410
# Deinit the certificate
411
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
412
# Convert the buffer to a Python bytestring
413
fpr = ctypes.string_at(buffer, buffer_length.value)
414
# Convert the bytestring to hexadecimal notation
415
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
416
return hex_fpr
417
418
419
class tcp_handler(SocketServer.BaseRequestHandler, object):
420
"""A TCP request handler class.
421
Instantiated by IPv6_TCPServer for each request to handle it.
1615
422
Note: This will run in its own forked process."""
1616
423
1617
424
def handle(self):
1618
with contextlib.closing(self.server.child_pipe) as child_pipe:
1619
logger.info("TCP connection from: %s",
1620
unicode(self.client_address))
1621
logger.debug("Pipe FD: %d",
1622
self.server.child_pipe.fileno())
1623
1624
session = (gnutls.connection
1625
.ClientSession(self.request,
1626
gnutls.connection
1627
.X509Credentials()))
1628
1629
# Note: gnutls.connection.X509Credentials is really a
1630
# generic GnuTLS certificate credentials object so long as
1631
# no X.509 keys are added to it. Therefore, we can use it
1632
# here despite using OpenPGP certificates.
1633
1634
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1635
# "+AES-256-CBC", "+SHA1",
1636
# "+COMP-NULL", "+CTYPE-OPENPGP",
1637
# "+DHE-DSS"))
1638
# Use a fallback default, since this MUST be set.
1639
priority = self.server.gnutls_priority
1640
if priority is None:
1641
priority = "NORMAL"
1642
(gnutls.library.functions
1643
.gnutls_priority_set_direct(session._c_object,
1644
priority, None))
1645
1646
# Start communication using the Mandos protocol
1647
# Get protocol number
1648
line = self.request.makefile().readline()
1649
logger.debug("Protocol version: %r", line)
1650
try:
1651
if int(line.strip().split()[0]) > 1:
1652
raise RuntimeError
1653
except (ValueError, IndexError, RuntimeError) as error:
1654
logger.error("Unknown protocol version: %s", error)
1655
return
1656
1657
# Start GnuTLS connection
1658
try:
1659
session.handshake()
1660
except gnutls.errors.GNUTLSError as error:
1661
logger.warning("Handshake failed: %s", error)
1662
# Do not run session.bye() here: the session is not
1663
# established. Just abandon the request.
1664
return
1665
logger.debug("Handshake succeeded")
1666
1667
approval_required = False
1668
try:
1669
try:
1670
fpr = self.fingerprint(self.peer_certificate
1671
(session))
1672
except (TypeError,
1673
gnutls.errors.GNUTLSError) as error:
1674
logger.warning("Bad certificate: %s", error)
1675
return
1676
logger.debug("Fingerprint: %s", fpr)
1677
1678
try:
1679
client = ProxyClient(child_pipe, fpr,
1680
self.client_address)
1681
except KeyError:
1682
return
1683
1684
if client.approval_delay:
1685
delay = client.approval_delay
1686
client.approvals_pending += 1
1687
approval_required = True
1688
1689
while True:
1690
if not client.enabled:
1691
logger.info("Client %s is disabled",
1692
client.name)
1693
if self.server.use_dbus:
1694
# Emit D-Bus signal
1695
client.Rejected("Disabled")
1696
return
1697
1698
if client.approved or not client.approval_delay:
1699
#We are approved or approval is disabled
1700
break
1701
elif client.approved is None:
1702
logger.info("Client %s needs approval",
1703
client.name)
1704
if self.server.use_dbus:
1705
# Emit D-Bus signal
1706
client.NeedApproval(
1707
client.approval_delay_milliseconds(),
1708
client.approved_by_default)
1709
else:
1710
logger.warning("Client %s was not approved",
1711
client.name)
1712
if self.server.use_dbus:
1713
# Emit D-Bus signal
1714
client.Rejected("Denied")
1715
return
1716
1717
#wait until timeout or approved
1718
time = datetime.datetime.now()
1719
client.changedstate.acquire()
1720
(client.changedstate.wait
1721
(float(client.timedelta_to_milliseconds(delay)
1722
/ 1000)))
1723
client.changedstate.release()
1724
time2 = datetime.datetime.now()
1725
if (time2 - time) >= delay:
1726
if not client.approved_by_default:
1727
logger.warning("Client %s timed out while"
1728
" waiting for approval",
1729
client.name)
1730
if self.server.use_dbus:
1731
# Emit D-Bus signal
1732
client.Rejected("Approval timed out")
1733
return
1734
else:
1735
break
1736
else:
1737
delay -= time2 - time
1738
1739
sent_size = 0
1740
while sent_size < len(client.secret):
1741
try:
1742
sent = session.send(client.secret[sent_size:])
1743
except gnutls.errors.GNUTLSError as error:
1744
logger.warning("gnutls send failed")
1745
return
1746
logger.debug("Sent: %d, remaining: %d",
1747
sent, len(client.secret)
1748
- (sent_size + sent))
1749
sent_size += sent
1750
1751
logger.info("Sending secret to %s", client.name)
1752
# bump the timeout using extended_timeout
1753
client.bump_timeout(client.extended_timeout)
1754
if self.server.use_dbus:
1755
# Emit D-Bus signal
1756
client.GotSecret()
1757
1758
finally:
1759
if approval_required:
1760
client.approvals_pending -= 1
1761
try:
1762
session.bye()
1763
except gnutls.errors.GNUTLSError as error:
1764
logger.warning("GnuTLS bye failed")
1765
1766
@staticmethod
1767
def peer_certificate(session):
1768
"Return the peer's OpenPGP certificate as a bytestring"
1769
# If not an OpenPGP certificate...
1770
if (gnutls.library.functions
1771
.gnutls_certificate_type_get(session._c_object)
1772
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1773
# ...do the normal thing
1774
return session.peer_certificate
1775
list_size = ctypes.c_uint(1)
1776
cert_list = (gnutls.library.functions
1777
.gnutls_certificate_get_peers
1778
(session._c_object, ctypes.byref(list_size)))
1779
if not bool(cert_list) and list_size.value != 0:
1780
raise gnutls.errors.GNUTLSError("error getting peer"
1781
" certificate")
1782
if list_size.value == 0:
1783
return None
1784
cert = cert_list[0]
1785
return ctypes.string_at(cert.data, cert.size)
1786
1787
@staticmethod
1788
def fingerprint(openpgp):
1789
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1790
# New GnuTLS "datum" with the OpenPGP public key
1791
datum = (gnutls.library.types
1792
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1793
ctypes.POINTER
1794
(ctypes.c_ubyte)),
1795
ctypes.c_uint(len(openpgp))))
1796
# New empty GnuTLS certificate
1797
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1798
(gnutls.library.functions
1799
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1800
# Import the OpenPGP public key into the certificate
1801
(gnutls.library.functions
1802
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1803
gnutls.library.constants
1804
.GNUTLS_OPENPGP_FMT_RAW))
1805
# Verify the self signature in the key
1806
crtverify = ctypes.c_uint()
1807
(gnutls.library.functions
1808
.gnutls_openpgp_crt_verify_self(crt, 0,
1809
ctypes.byref(crtverify)))
1810
if crtverify.value != 0:
1811
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1812
raise (gnutls.errors.CertificateSecurityError
1813
("Verify failed"))
1814
# New buffer for the fingerprint
1815
buf = ctypes.create_string_buffer(20)
1816
buf_len = ctypes.c_size_t()
1817
# Get the fingerprint from the certificate into the buffer
1818
(gnutls.library.functions
1819
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1820
ctypes.byref(buf_len)))
1821
# Deinit the certificate
1822
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1823
# Convert the buffer to a Python bytestring
1824
fpr = ctypes.string_at(buf, buf_len.value)
1825
# Convert the bytestring to hexadecimal notation
1826
hex_fpr = binascii.hexlify(fpr).upper()
1827
return hex_fpr
1828
1829
1830
class MultiprocessingMixIn(object):
1831
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1832
def sub_process_main(self, request, address):
1833
try:
1834
self.finish_request(request, address)
1835
except Exception:
1836
self.handle_error(request, address)
1837
self.close_request(request)
1838
1839
def process_request(self, request, address):
1840
"""Start a new process to process the request."""
1841
proc = multiprocessing.Process(target = self.sub_process_main,
1842
args = (request,
1843
address))
1844
proc.start()
1845
return proc
1846
1847
1848
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1849
""" adds a pipe to the MixIn """
1850
def process_request(self, request, client_address):
1851
"""Overrides and wraps the original process_request().
1852
1853
This function creates a new pipe in self.pipe
1854
"""
1855
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1856
1857
proc = MultiprocessingMixIn.process_request(self, request,
1858
client_address)
1859
self.child_pipe.close()
1860
self.add_pipe(parent_pipe, proc)
1861
1862
def add_pipe(self, parent_pipe, proc):
1863
"""Dummy function; override as necessary"""
1864
raise NotImplementedError
1865
1866
1867
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1868
socketserver.TCPServer, object):
1869
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1870
425
logger.info(u"TCP connection from: %s",
426
unicode(self.client_address))
427
session = gnutls.connection.ClientSession\
428
(self.request, gnutls.connection.X509Credentials())
429
430
line = self.request.makefile().readline()
431
logger.debug(u"Protocol version: %r", line)
432
try:
433
if int(line.strip().split()[0]) > 1:
434
raise RuntimeError
435
except (ValueError, IndexError, RuntimeError), error:
436
logger.error(u"Unknown protocol version: %s", error)
437
return
438
439
# Note: gnutls.connection.X509Credentials is really a generic
440
# GnuTLS certificate credentials object so long as no X.509
441
# keys are added to it. Therefore, we can use it here despite
442
# using OpenPGP certificates.
443
444
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
445
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
446
# "+DHE-DSS"))
447
priority = "NORMAL" # Fallback default, since this
448
# MUST be set.
449
if self.server.settings["priority"]:
450
priority = self.server.settings["priority"]
451
gnutls.library.functions.gnutls_priority_set_direct\
452
(session._c_object, priority, None);
453
454
try:
455
session.handshake()
456
except gnutls.errors.GNUTLSError, error:
457
logger.warning(u"Handshake failed: %s", error)
458
# Do not run session.bye() here: the session is not
459
# established. Just abandon the request.
460
return
461
try:
462
fpr = fingerprint(peer_certificate(session))
463
except (TypeError, gnutls.errors.GNUTLSError), error:
464
logger.warning(u"Bad certificate: %s", error)
465
session.bye()
466
return
467
logger.debug(u"Fingerprint: %s", fpr)
468
client = None
469
for c in self.server.clients:
470
if c.fingerprint == fpr:
471
client = c
472
break
473
if not client:
474
logger.warning(u"Client not found for fingerprint: %s",
475
fpr)
476
session.bye()
477
return
478
# Have to check if client.still_valid(), since it is possible
479
# that the client timed out while establishing the GnuTLS
480
# session.
481
if not client.still_valid():
482
logger.warning(u"Client %(name)s is invalid",
483
vars(client))
484
session.bye()
485
return
486
sent_size = 0
487
while sent_size < len(client.secret):
488
sent = session.send(client.secret[sent_size:])
489
logger.debug(u"Sent: %d, remaining: %d",
490
sent, len(client.secret)
491
- (sent_size + sent))
492
sent_size += sent
493
session.bye()
494
495
496
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
497
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1871
498
Attributes:
1872
enabled: Boolean; whether this server is activated yet
1873
interface: None or a network interface name (string)
1874
use_ipv6: Boolean; to use IPv6 or not
499
settings: Server settings
500
clients: Set() of Client objects
1875
501
"""
1876
def __init__(self, server_address, RequestHandlerClass,
1877
interface=None, use_ipv6=True):
1878
self.interface = interface
1879
if use_ipv6:
1880
self.address_family = socket.AF_INET6
1881
socketserver.TCPServer.__init__(self, server_address,
1882
RequestHandlerClass)
502
address_family = socket.AF_INET6
503
def __init__(self, *args, **kwargs):
504
if "settings" in kwargs:
505
self.settings = kwargs["settings"]
506
del kwargs["settings"]
507
if "clients" in kwargs:
508
self.clients = kwargs["clients"]
509
del kwargs["clients"]
510
return super(type(self), self).__init__(*args, **kwargs)
1883
511
def server_bind(self):
1884
512
"""This overrides the normal server_bind() function
1885
513
to bind to an interface if one was specified, and also NOT to
1886
514
bind to an address or port if they were not specified."""
1887
if self.interface is not None:
1888
if SO_BINDTODEVICE is None:
1889
logger.error("SO_BINDTODEVICE does not exist;"
1890
" cannot bind to interface %s",
1891
self.interface)
1892
else:
1893
try:
1894
self.socket.setsockopt(socket.SOL_SOCKET,
1895
SO_BINDTODEVICE,
1896
str(self.interface
1897
+ '\0'))
1898
except socket.error as error:
1899
if error[0] == errno.EPERM:
1900
logger.error("No permission to"
1901
" bind to interface %s",
1902
self.interface)
1903
elif error[0] == errno.ENOPROTOOPT:
1904
logger.error("SO_BINDTODEVICE not available;"
1905
" cannot bind to interface %s",
1906
self.interface)
1907
else:
1908
raise
515
if self.settings["interface"]:
516
# 25 is from /usr/include/asm-i486/socket.h
517
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
518
try:
519
self.socket.setsockopt(socket.SOL_SOCKET,
520
SO_BINDTODEVICE,
521
self.settings["interface"])
522
except socket.error, error:
523
if error[0] == errno.EPERM:
524
logger.error(u"No permission to"
525
u" bind to interface %s",
526
self.settings["interface"])
527
else:
528
raise error
1909
529
# Only bind(2) the socket if we really need to.
1910
530
if self.server_address[0] or self.server_address[1]:
1911
531
if not self.server_address[0]:
1912
if self.address_family == socket.AF_INET6:
1913
any_address = "::" # in6addr_any
1914
else:
1915
any_address = socket.INADDR_ANY
1916
self.server_address = (any_address,
532
in6addr_any = "::"
533
self.server_address = (in6addr_any,
1917
534
self.server_address[1])
1918
535
elif not self.server_address[1]:
1919
536
self.server_address = (self.server_address[0],
1920
537
0)
1921
# if self.interface:
538
# if self.settings["interface"]:
1922
539
# self.server_address = (self.server_address[0],
1923
540
# 0, # port
1924
541
# 0, # flowinfo
1925
542
# if_nametoindex
1926
# (self.interface))
1927
return socketserver.TCPServer.server_bind(self)
1928
1929
1930
class MandosServer(IPv6_TCPServer):
1931
"""Mandos server.
1932
1933
Attributes:
1934
clients: set of Client objects
1935
gnutls_priority GnuTLS priority string
1936
use_dbus: Boolean; to emit D-Bus signals or not
1937
1938
Assumes a gobject.MainLoop event loop.
1939
"""
1940
def __init__(self, server_address, RequestHandlerClass,
1941
interface=None, use_ipv6=True, clients=None,
1942
gnutls_priority=None, use_dbus=True):
1943
self.enabled = False
1944
self.clients = clients
1945
if self.clients is None:
1946
self.clients = {}
1947
self.use_dbus = use_dbus
1948
self.gnutls_priority = gnutls_priority
1949
IPv6_TCPServer.__init__(self, server_address,
1950
RequestHandlerClass,
1951
interface = interface,
1952
use_ipv6 = use_ipv6)
1953
def server_activate(self):
1954
if self.enabled:
1955
return socketserver.TCPServer.server_activate(self)
1956
1957
def enable(self):
1958
self.enabled = True
1959
1960
def add_pipe(self, parent_pipe, proc):
1961
# Call "handle_ipc" for both data and EOF events
1962
gobject.io_add_watch(parent_pipe.fileno(),
1963
gobject.IO_IN | gobject.IO_HUP,
1964
functools.partial(self.handle_ipc,
1965
parent_pipe =
1966
parent_pipe,
1967
proc = proc))
1968
1969
def handle_ipc(self, source, condition, parent_pipe=None,
1970
proc = None, client_object=None):
1971
condition_names = {
1972
gobject.IO_IN: "IN", # There is data to read.
1973
gobject.IO_OUT: "OUT", # Data can be written (without
1974
# blocking).
1975
gobject.IO_PRI: "PRI", # There is urgent data to read.
1976
gobject.IO_ERR: "ERR", # Error condition.
1977
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1978
# broken, usually for pipes and
1979
# sockets).
1980
}
1981
conditions_string = ' | '.join(name
1982
for cond, name in
1983
condition_names.iteritems()
1984
if cond & condition)
1985
# error, or the other end of multiprocessing.Pipe has closed
1986
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1987
# Wait for other process to exit
1988
proc.join()
1989
return False
1990
1991
# Read a request from the child
1992
request = parent_pipe.recv()
1993
command = request[0]
1994
1995
if command == 'init':
1996
fpr = request[1]
1997
address = request[2]
1998
1999
for c in self.clients.itervalues():
2000
if c.fingerprint == fpr:
2001
client = c
2002
break
2003
else:
2004
logger.info("Client not found for fingerprint: %s, ad"
2005
"dress: %s", fpr, address)
2006
if self.use_dbus:
2007
# Emit D-Bus signal
2008
mandos_dbus_service.ClientNotFound(fpr,
2009
address[0])
2010
parent_pipe.send(False)
2011
return False
2012
2013
gobject.io_add_watch(parent_pipe.fileno(),
2014
gobject.IO_IN | gobject.IO_HUP,
2015
functools.partial(self.handle_ipc,
2016
parent_pipe =
2017
parent_pipe,
2018
proc = proc,
2019
client_object =
2020
client))
2021
parent_pipe.send(True)
2022
# remove the old hook in favor of the new above hook on
2023
# same fileno
2024
return False
2025
if command == 'funcall':
2026
funcname = request[1]
2027
args = request[2]
2028
kwargs = request[3]
2029
2030
parent_pipe.send(('data', getattr(client_object,
2031
funcname)(*args,
2032
**kwargs)))
2033
2034
if command == 'getattr':
2035
attrname = request[1]
2036
if callable(client_object.__getattribute__(attrname)):
2037
parent_pipe.send(('function',))
2038
else:
2039
parent_pipe.send(('data', client_object
2040
.__getattribute__(attrname)))
2041
2042
if command == 'setattr':
2043
attrname = request[1]
2044
value = request[2]
2045
setattr(client_object, attrname, value)
2046
2047
return True
543
# (self.settings
544
# ["interface"]))
545
return super(type(self), self).server_bind()
2048
546
2049
547
2050
548
def string_to_delta(interval):
2051
549
"""Parse a string and return a datetime.timedelta
2052
550
2053
551
>>> string_to_delta('7d')
2054
552
datetime.timedelta(7)
2055
553
>>> string_to_delta('60s')
2058
556
datetime.timedelta(0, 3600)
2059
557
>>> string_to_delta('24h')
2060
558
datetime.timedelta(1)
2061
>>> string_to_delta('1w')
559
>>> string_to_delta(u'1w')
2062
560
datetime.timedelta(7)
2063
>>> string_to_delta('5m 30s')
2064
datetime.timedelta(0, 330)
2065
561
"""
2066
timevalue = datetime.timedelta(0)
2067
for s in interval.split():
2068
try:
2069
suffix = unicode(s[-1])
2070
value = int(s[:-1])
2071
if suffix == "d":
2072
delta = datetime.timedelta(value)
2073
elif suffix == "s":
2074
delta = datetime.timedelta(0, value)
2075
elif suffix == "m":
2076
delta = datetime.timedelta(0, 0, 0, 0, value)
2077
elif suffix == "h":
2078
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2079
elif suffix == "w":
2080
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2081
else:
2082
raise ValueError("Unknown suffix {0!r}"
2083
.format(suffix))
2084
except (ValueError, IndexError) as e:
2085
raise ValueError(*(e.args))
2086
timevalue += delta
2087
return timevalue
562
try:
563
suffix=unicode(interval[-1])
564
value=int(interval[:-1])
565
if suffix == u"d":
566
delta = datetime.timedelta(value)
567
elif suffix == u"s":
568
delta = datetime.timedelta(0, value)
569
elif suffix == u"m":
570
delta = datetime.timedelta(0, 0, 0, 0, value)
571
elif suffix == u"h":
572
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
elif suffix == u"w":
574
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
else:
576
raise ValueError
577
except (ValueError, IndexError):
578
raise ValueError
579
return delta
580
581
582
def server_state_changed(state):
583
"""Derived from the Avahi example code"""
584
if state == avahi.SERVER_COLLISION:
585
logger.error(u"Server name collision")
586
service.remove()
587
elif state == avahi.SERVER_RUNNING:
588
service.add()
589
590
591
def entry_group_state_changed(state, error):
592
"""Derived from the Avahi example code"""
593
logger.debug(u"state change: %i", state)
594
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
logger.debug(u"Service established.")
597
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
600
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
604
605
def if_nametoindex(interface):
606
"""Call the C function if_nametoindex(), or equivalent"""
607
global if_nametoindex
608
try:
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
613
except (OSError, AttributeError):
614
if "struct" not in sys.modules:
615
import struct
616
if "fcntl" not in sys.modules:
617
import fcntl
618
def if_nametoindex(interface):
619
"Get an interface index the hard way, i.e. using fcntl()"
620
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
626
return interface_index
627
return if_nametoindex(interface)
2088
628
2089
629
2090
630
def daemon(nochdir = False, noclose = False):
2091
631
"""See daemon(3). Standard BSD Unix function.
2092
2093
632
This should really exist as os.daemon, but it doesn't (yet)."""
2094
633
if os.fork():
2095
634
sys.exit()
2100
639
sys.exit()
2101
640
if not noclose:
2102
641
# Close all standard open file descriptors
2103
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
642
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2104
643
if not stat.S_ISCHR(os.fstat(null).st_mode):
2105
644
raise OSError(errno.ENODEV,
2106
"{0} not a character device"
2107
.format(os.devnull))
645
"/dev/null not a character device")
2108
646
os.dup2(null, sys.stdin.fileno())
2109
647
os.dup2(null, sys.stdout.fileno())
2110
648
os.dup2(null, sys.stderr.fileno())
2113
651
2114
652
2115
653
def main():
2116
2117
##################################################################
2118
# Parsing of options, both command line and config file
2119
2120
parser = argparse.ArgumentParser()
2121
parser.add_argument("-v", "--version", action="version",
2122
version = "%(prog)s {0}".format(version),
2123
help="show version number and exit")
2124
parser.add_argument("-i", "--interface", metavar="IF",
2125
help="Bind to interface IF")
2126
parser.add_argument("-a", "--address",
2127
help="Address to listen for requests on")
2128
parser.add_argument("-p", "--port", type=int,
2129
help="Port number to receive requests on")
2130
parser.add_argument("--check", action="store_true",
2131
help="Run self-test")
2132
parser.add_argument("--debug", action="store_true",
2133
help="Debug mode; run in foreground and log"
2134
" to terminal")
2135
parser.add_argument("--debuglevel", metavar="LEVEL",
2136
help="Debug level for stdout output")
2137
parser.add_argument("--priority", help="GnuTLS"
2138
" priority string (see GnuTLS documentation)")
2139
parser.add_argument("--servicename",
2140
metavar="NAME", help="Zeroconf service name")
2141
parser.add_argument("--configdir",
2142
default="/etc/mandos", metavar="DIR",
2143
help="Directory to search for configuration"
2144
" files")
2145
parser.add_argument("--no-dbus", action="store_false",
2146
dest="use_dbus", help="Do not provide D-Bus"
2147
" system bus interface")
2148
parser.add_argument("--no-ipv6", action="store_false",
2149
dest="use_ipv6", help="Do not use IPv6")
2150
parser.add_argument("--no-restore", action="store_false",
2151
dest="restore", help="Do not restore stored"
2152
" state")
2153
parser.add_argument("--statedir", metavar="DIR",
2154
help="Directory to save/restore state in")
2155
2156
options = parser.parse_args()
654
global main_loop_started
655
main_loop_started = False
656
657
parser = OptionParser(version = "Mandos server %s" % version)
658
parser.add_option("-i", "--interface", type="string",
659
metavar="IF", help="Bind to interface IF")
660
parser.add_option("-a", "--address", type="string",
661
help="Address to listen for requests on")
662
parser.add_option("-p", "--port", type="int",
663
help="Port number to receive requests on")
664
parser.add_option("--check", action="store_true", default=False,
665
help="Run self-test")
666
parser.add_option("--debug", action="store_true",
667
help="Debug mode; run in foreground and log to"
668
" terminal")
669
parser.add_option("--priority", type="string", help="GnuTLS"
670
" priority string (see GnuTLS documentation)")
671
parser.add_option("--servicename", type="string", metavar="NAME",
672
help="Zeroconf service name")
673
parser.add_option("--configdir", type="string",
674
default="/etc/mandos", metavar="DIR",
675
help="Directory to search for configuration"
676
" files")
677
(options, args) = parser.parse_args()
2157
678
2158
679
if options.check:
2159
680
import doctest
2168
689
"priority":
2169
690
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2170
691
"servicename": "Mandos",
2171
"use_dbus": "True",
2172
"use_ipv6": "True",
2173
"debuglevel": "",
2174
"restore": "True",
2175
"statedir": "/var/lib/mandos"
2176
692
}
2177
693
2178
694
# Parse config file for server-global settings
2179
server_config = configparser.SafeConfigParser(server_defaults)
695
server_config = ConfigParser.SafeConfigParser(server_defaults)
2180
696
del server_defaults
2181
server_config.read(os.path.join(options.configdir,
2182
"mandos.conf"))
697
server_config.read(os.path.join(options.configdir, "mandos.conf"))
698
server_section = "server"
2183
699
# Convert the SafeConfigParser object to a dict
2184
server_settings = server_config.defaults()
2185
# Use the appropriate methods on the non-string config options
2186
for option in ("debug", "use_dbus", "use_ipv6"):
2187
server_settings[option] = server_config.getboolean("DEFAULT",
2188
option)
2189
if server_settings["port"]:
2190
server_settings["port"] = server_config.getint("DEFAULT",
2191
"port")
700
server_settings = dict(server_config.items(server_section))
701
# Use getboolean on the boolean config option
702
server_settings["debug"] = server_config.getboolean\
703
(server_section, "debug")
2192
704
del server_config
2193
705
2194
706
# Override the settings from the config file with command line
2195
707
# options, if set.
2196
708
for option in ("interface", "address", "port", "debug",
2197
"priority", "servicename", "configdir",
2198
"use_dbus", "use_ipv6", "debuglevel", "restore",
2199
"statedir"):
709
"priority", "servicename", "configdir"):
2200
710
value = getattr(options, option)
2201
711
if value is not None:
2202
712
server_settings[option] = value
2203
713
del options
2204
# Force all strings to be unicode
2205
for option in server_settings.keys():
2206
if type(server_settings[option]) is str:
2207
server_settings[option] = unicode(server_settings[option])
2208
714
# Now we have our good server settings in "server_settings"
2209
715
2210
##################################################################
2211
2212
# For convenience
2213
716
debug = server_settings["debug"]
2214
debuglevel = server_settings["debuglevel"]
2215
use_dbus = server_settings["use_dbus"]
2216
use_ipv6 = server_settings["use_ipv6"]
2217
stored_state_path = os.path.join(server_settings["statedir"],
2218
stored_state_file)
2219
717
2220
if debug:
2221
initlogger(debug, logging.DEBUG)
2222
else:
2223
if not debuglevel:
2224
initlogger(debug)
2225
else:
2226
level = getattr(logging, debuglevel.upper())
2227
initlogger(debug, level)
718
if not debug:
719
syslogger.setLevel(logging.WARNING)
2228
720
2229
721
if server_settings["servicename"] != "Mandos":
2230
syslogger.setFormatter(logging.Formatter
2231
('Mandos ({0}) [%(process)d]:'
2232
' %(levelname)s: %(message)s'
2233
.format(server_settings
2234
["servicename"])))
722
syslogger.setFormatter(logging.Formatter\
723
('Mandos (%s): %%(levelname)s:'
724
' %%(message)s'
725
% server_settings["servicename"]))
2235
726
2236
727
# Parse config file with clients
2237
client_config = configparser.SafeConfigParser(Client
2238
.client_defaults)
728
client_defaults = { "timeout": "1h",
729
"interval": "5m",
730
"checker": "fping -q -- %%(host)s",
731
}
732
client_config = ConfigParser.SafeConfigParser(client_defaults)
2239
733
client_config.read(os.path.join(server_settings["configdir"],
2240
734
"clients.conf"))
2241
735
2242
global mandos_dbus_service
2243
mandos_dbus_service = None
2244
2245
tcp_server = MandosServer((server_settings["address"],
2246
server_settings["port"]),
2247
ClientHandler,
2248
interface=(server_settings["interface"]
2249
or None),
2250
use_ipv6=use_ipv6,
2251
gnutls_priority=
2252
server_settings["priority"],
2253
use_dbus=use_dbus)
2254
if not debug:
2255
pidfilename = "/var/run/mandos.pid"
2256
try:
2257
pidfile = open(pidfilename, "w")
2258
except IOError:
2259
logger.error("Could not open file %r", pidfilename)
2260
2261
for name in ("_mandos", "mandos", "nobody"):
2262
try:
2263
uid = pwd.getpwnam(name).pw_uid
2264
gid = pwd.getpwnam(name).pw_gid
2265
break
2266
except KeyError:
2267
continue
2268
else:
2269
uid = 65534
2270
gid = 65534
2271
try:
2272
os.setgid(gid)
2273
os.setuid(uid)
2274
except OSError as error:
2275
if error[0] != errno.EPERM:
2276
raise error
2277
2278
if debug:
2279
# Enable all possible GnuTLS debugging
2280
2281
# "Use a log level over 10 to enable all debugging options."
2282
# - GnuTLS manual
2283
gnutls.library.functions.gnutls_global_set_log_level(11)
2284
2285
@gnutls.library.types.gnutls_log_func
2286
def debug_gnutls(level, string):
2287
logger.debug("GnuTLS: %s", string[:-1])
2288
2289
(gnutls.library.functions
2290
.gnutls_global_set_log_function(debug_gnutls))
2291
2292
# Redirect stdin so all checkers get /dev/null
2293
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2294
os.dup2(null, sys.stdin.fileno())
2295
if null > 2:
2296
os.close(null)
2297
2298
# Need to fork before connecting to D-Bus
2299
if not debug:
2300
# Close all input and output, do double fork, etc.
2301
daemon()
2302
2303
gobject.threads_init()
736
global service
737
service = AvahiService(name = server_settings["servicename"],
738
type = "_mandos._tcp", );
739
if server_settings["interface"]:
740
service.interface = if_nametoindex(server_settings["interface"])
2304
741
2305
742
global main_loop
743
global bus
744
global server
2306
745
# From the Avahi example code
2307
DBusGMainLoop(set_as_default=True)
746
DBusGMainLoop(set_as_default=True )
2308
747
main_loop = gobject.MainLoop()
2309
748
bus = dbus.SystemBus()
749
server = dbus.Interface(
750
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
751
avahi.DBUS_INTERFACE_SERVER )
2310
752
# End of Avahi example code
2311
if use_dbus:
2312
try:
2313
bus_name = dbus.service.BusName("se.recompile.Mandos",
2314
bus, do_not_queue=True)
2315
old_bus_name = (dbus.service.BusName
2316
("se.bsnet.fukt.Mandos", bus,
2317
do_not_queue=True))
2318
except dbus.exceptions.NameExistsException as e:
2319
logger.error(unicode(e) + ", disabling D-Bus")
2320
use_dbus = False
2321
server_settings["use_dbus"] = False
2322
tcp_server.use_dbus = False
2323
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2324
service = AvahiServiceToSyslog(name =
2325
server_settings["servicename"],
2326
servicetype = "_mandos._tcp",
2327
protocol = protocol, bus = bus)
2328
if server_settings["interface"]:
2329
service.interface = (if_nametoindex
2330
(str(server_settings["interface"])))
2331
2332
global multiprocessing_manager
2333
multiprocessing_manager = multiprocessing.Manager()
2334
2335
client_class = Client
2336
if use_dbus:
2337
client_class = functools.partial(ClientDBusTransitional,
2338
bus = bus)
2339
2340
client_settings = Client.config_parser(client_config)
2341
old_client_settings = {}
2342
clients_data = {}
2343
2344
# Get client data and settings from last running state.
2345
if server_settings["restore"]:
2346
try:
2347
with open(stored_state_path, "rb") as stored_state:
2348
clients_data, old_client_settings = (pickle.load
2349
(stored_state))
2350
os.remove(stored_state_path)
2351
except IOError as e:
2352
logger.warning("Could not load persistent state: {0}"
2353
.format(e))
2354
if e.errno != errno.ENOENT:
2355
raise
2356
except EOFError as e:
2357
logger.warning("Could not load persistent state: "
2358
"EOFError: {0}".format(e))
2359
2360
with PGPEngine() as pgp:
2361
for client_name, client in clients_data.iteritems():
2362
# Decide which value to use after restoring saved state.
2363
# We have three different values: Old config file,
2364
# new config file, and saved state.
2365
# New config value takes precedence if it differs from old
2366
# config value, otherwise use saved state.
2367
for name, value in client_settings[client_name].items():
2368
try:
2369
# For each value in new config, check if it
2370
# differs from the old config value (Except for
2371
# the "secret" attribute)
2372
if (name != "secret" and
2373
value != old_client_settings[client_name]
2374
[name]):
2375
client[name] = value
2376
except KeyError:
2377
pass
2378
2379
# Clients who has passed its expire date can still be
2380
# enabled if its last checker was successful. Clients
2381
# whose checker succeeded before we stored its state is
2382
# assumed to have successfully run all checkers during
2383
# downtime.
2384
if client["enabled"]:
2385
if datetime.datetime.utcnow() >= client["expires"]:
2386
if not client["last_checked_ok"]:
2387
logger.warning(
2388
"disabling client {0} - Client never "
2389
"performed a successful checker"
2390
.format(client_name))
2391
client["enabled"] = False
2392
elif client["last_checker_status"] != 0:
2393
logger.warning(
2394
"disabling client {0} - Client "
2395
"last checker failed with error code {1}"
2396
.format(client_name,
2397
client["last_checker_status"]))
2398
client["enabled"] = False
2399
else:
2400
client["expires"] = (datetime.datetime
2401
.utcnow()
2402
+ client["timeout"])
2403
logger.debug("Last checker succeeded,"
2404
" keeping {0} enabled"
2405
.format(client_name))
2406
try:
2407
client["secret"] = (
2408
pgp.decrypt(client["encrypted_secret"],
2409
client_settings[client_name]
2410
["secret"]))
2411
except PGPError:
2412
# If decryption fails, we use secret from new settings
2413
logger.debug("Failed to decrypt {0} old secret"
2414
.format(client_name))
2415
client["secret"] = (
2416
client_settings[client_name]["secret"])
2417
2418
2419
# Add/remove clients based on new changes made to config
2420
for client_name in (set(old_client_settings)
2421
- set(client_settings)):
2422
del clients_data[client_name]
2423
for client_name in (set(client_settings)
2424
- set(old_client_settings)):
2425
clients_data[client_name] = client_settings[client_name]
2426
2427
# Create all client objects
2428
for client_name, client in clients_data.iteritems():
2429
tcp_server.clients[client_name] = client_class(
2430
name = client_name, settings = client)
2431
2432
if not tcp_server.clients:
2433
logger.warning("No clients defined")
753
754
if debug:
755
console = logging.StreamHandler()
756
# console.setLevel(logging.DEBUG)
757
console.setFormatter(logging.Formatter\
758
('%(levelname)s: %(message)s'))
759
logger.addHandler(console)
760
del console
761
762
clients = Set()
763
def remove_from_clients(client):
764
clients.remove(client)
765
if not clients:
766
logger.critical(u"No clients left, exiting")
767
sys.exit()
768
769
clients.update(Set(Client(name = section,
770
stop_hook = remove_from_clients,
771
config
772
= dict(client_config.items(section)))
773
for section in client_config.sections()))
774
if not clients:
775
logger.critical(u"No clients defined")
776
sys.exit(1)
777
778
if not debug:
779
daemon()
780
781
pidfilename = "/var/run/mandos/mandos.pid"
782
pid = os.getpid()
783
try:
784
pidfile = open(pidfilename, "w")
785
pidfile.write(str(pid) + "\n")
786
pidfile.close()
787
del pidfile
788
except IOError, err:
789
logger.error(u"Could not write %s file with PID %d",
790
pidfilename, os.getpid())
791
792
def cleanup():
793
"Cleanup function; run on exit"
794
global group
795
# From the Avahi example code
796
if not group is None:
797
group.Free()
798
group = None
799
# End of Avahi example code
2434
800
801
while clients:
802
client = clients.pop()
803
client.stop_hook = None
804
client.stop()
805
806
atexit.register(cleanup)
807
2435
808
if not debug:
2436
try:
2437
with pidfile:
2438
pid = os.getpid()
2439
pidfile.write(str(pid) + "\n".encode("utf-8"))
2440
del pidfile
2441
except IOError:
2442
logger.error("Could not write to file %r with PID %d",
2443
pidfilename, pid)
2444
except NameError:
2445
# "pidfile" was never created
2446
pass
2447
del pidfilename
2448
809
signal.signal(signal.SIGINT, signal.SIG_IGN)
2449
2450
810
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2451
811
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2452
812
2453
if use_dbus:
2454
class MandosDBusService(DBusObjectWithProperties):
2455
"""A D-Bus proxy object"""
2456
def __init__(self):
2457
dbus.service.Object.__init__(self, bus, "/")
2458
_interface = "se.recompile.Mandos"
2459
2460
@dbus_interface_annotations(_interface)
2461
def _foo(self):
2462
return { "org.freedesktop.DBus.Property"
2463
".EmitsChangedSignal":
2464
"false"}
2465
2466
@dbus.service.signal(_interface, signature="o")
2467
def ClientAdded(self, objpath):
2468
"D-Bus signal"
2469
pass
2470
2471
@dbus.service.signal(_interface, signature="ss")
2472
def ClientNotFound(self, fingerprint, address):
2473
"D-Bus signal"
2474
pass
2475
2476
@dbus.service.signal(_interface, signature="os")
2477
def ClientRemoved(self, objpath, name):
2478
"D-Bus signal"
2479
pass
2480
2481
@dbus.service.method(_interface, out_signature="ao")
2482
def GetAllClients(self):
2483
"D-Bus method"
2484
return dbus.Array(c.dbus_object_path
2485
for c in
2486
tcp_server.clients.itervalues())
2487
2488
@dbus.service.method(_interface,
2489
out_signature="a{oa{sv}}")
2490
def GetAllClientsWithProperties(self):
2491
"D-Bus method"
2492
return dbus.Dictionary(
2493
((c.dbus_object_path, c.GetAll(""))
2494
for c in tcp_server.clients.itervalues()),
2495
signature="oa{sv}")
2496
2497
@dbus.service.method(_interface, in_signature="o")
2498
def RemoveClient(self, object_path):
2499
"D-Bus method"
2500
for c in tcp_server.clients.itervalues():
2501
if c.dbus_object_path == object_path:
2502
del tcp_server.clients[c.name]
2503
c.remove_from_connection()
2504
# Don't signal anything except ClientRemoved
2505
c.disable(quiet=True)
2506
# Emit D-Bus signal
2507
self.ClientRemoved(object_path, c.name)
2508
return
2509
raise KeyError(object_path)
2510
2511
del _interface
2512
2513
class MandosDBusServiceTransitional(MandosDBusService):
2514
__metaclass__ = AlternateDBusNamesMetaclass
2515
mandos_dbus_service = MandosDBusServiceTransitional()
2516
2517
def cleanup():
2518
"Cleanup function; run on exit"
2519
service.cleanup()
2520
2521
multiprocessing.active_children()
2522
if not (tcp_server.clients or client_settings):
2523
return
2524
2525
# Store client before exiting. Secrets are encrypted with key
2526
# based on what config file has. If config file is
2527
# removed/edited, old secret will thus be unrecovable.
2528
clients = {}
2529
with PGPEngine() as pgp:
2530
for client in tcp_server.clients.itervalues():
2531
key = client_settings[client.name]["secret"]
2532
client.encrypted_secret = pgp.encrypt(client.secret,
2533
key)
2534
client_dict = {}
2535
2536
# A list of attributes that can not be pickled
2537
# + secret.
2538
exclude = set(("bus", "changedstate", "secret",
2539
"checker"))
2540
for name, typ in (inspect.getmembers
2541
(dbus.service.Object)):
2542
exclude.add(name)
2543
2544
client_dict["encrypted_secret"] = (client
2545
.encrypted_secret)
2546
for attr in client.client_structure:
2547
if attr not in exclude:
2548
client_dict[attr] = getattr(client, attr)
2549
2550
clients[client.name] = client_dict
2551
del client_settings[client.name]["secret"]
2552
2553
try:
2554
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2555
prefix="clients-",
2556
dir=os.path.dirname
2557
(stored_state_path))
2558
with os.fdopen(tempfd, "wb") as stored_state:
2559
pickle.dump((clients, client_settings), stored_state)
2560
os.rename(tempname, stored_state_path)
2561
except (IOError, OSError) as e:
2562
logger.warning("Could not save persistent state: {0}"
2563
.format(e))
2564
if not debug:
2565
try:
2566
os.remove(tempname)
2567
except NameError:
2568
pass
2569
if e.errno not in set((errno.ENOENT, errno.EACCES,
2570
errno.EEXIST)):
2571
raise e
2572
2573
# Delete all clients, and settings from config
2574
while tcp_server.clients:
2575
name, client = tcp_server.clients.popitem()
2576
if use_dbus:
2577
client.remove_from_connection()
2578
# Don't signal anything except ClientRemoved
2579
client.disable(quiet=True)
2580
if use_dbus:
2581
# Emit D-Bus signal
2582
mandos_dbus_service.ClientRemoved(client
2583
.dbus_object_path,
2584
client.name)
2585
client_settings.clear()
2586
2587
atexit.register(cleanup)
2588
2589
for client in tcp_server.clients.itervalues():
2590
if use_dbus:
2591
# Emit D-Bus signal
2592
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2593
# Need to initiate checking of clients
2594
if client.enabled:
2595
client.init_checker()
2596
2597
tcp_server.enable()
2598
tcp_server.server_activate()
2599
813
for client in clients:
814
client.start()
815
816
tcp_server = IPv6_TCPServer((server_settings["address"],
817
server_settings["port"]),
818
tcp_handler,
819
settings=server_settings,
820
clients=clients)
2600
821
# Find out what port we got
2601
822
service.port = tcp_server.socket.getsockname()[1]
2602
if use_ipv6:
2603
logger.info("Now listening on address %r, port %d,"
2604
" flowinfo %d, scope_id %d",
2605
*tcp_server.socket.getsockname())
2606
else: # IPv4
2607
logger.info("Now listening on address %r, port %d",
2608
*tcp_server.socket.getsockname())
823
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
824
u" scope_id %d" % tcp_server.socket.getsockname())
2609
825
2610
826
#service.interface = tcp_server.socket.getsockname()[3]
2611
827
2612
828
try:
2613
829
# From the Avahi example code
830
server.connect_to_signal("StateChanged", server_state_changed)
2614
831
try:
2615
service.activate()
2616
except dbus.exceptions.DBusException as error:
2617
logger.critical("D-Bus Exception", exc_info=error)
2618
cleanup()
832
server_state_changed(server.GetState())
833
except dbus.exceptions.DBusException, error:
834
logger.critical(u"DBusException: %s", error)
2619
835
sys.exit(1)
2620
836
# End of Avahi example code
2621
837
2622
838
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2623
839
lambda *args, **kwargs:
2624
(tcp_server.handle_request
2625
(*args[2:], **kwargs) or True))
840
tcp_server.handle_request\
841
(*args[2:], **kwargs) or True)
2626
842
2627
logger.debug("Starting main loop")
843
logger.debug(u"Starting main loop")
844
main_loop_started = True
2628
845
main_loop.run()
2629
except AvahiError as error:
2630
logger.critical("Avahi Error", exc_info=error)
2631
cleanup()
846
except AvahiError, error:
847
logger.critical(u"AvahiError: %s" + unicode(error))
2632
848
sys.exit(1)
2633
849
except KeyboardInterrupt:
2634
850
if debug:
2635
print("", file=sys.stderr)
2636
logger.debug("Server received KeyboardInterrupt")
2637
logger.debug("Server exiting")
2638
# Must run before the D-Bus bus name gets deregistered
2639
cleanup()
851
print
2640
852
2641
853
if __name__ == '__main__':
2642
854
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0