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- Committer: Teddy Hogeborn
- Date: 2009-01-17 00:26:13 UTC
- Revision ID: teddy@fukt.bsnet.se-20090117002613-lg5x2b8mnmi3alqy
Fix problem found using cppcheck, thanks to George Danchev
<danchev@spnet.net> for the report and fix:
* plugin-runner.c (getplugin): Bug fix: Free the plugin struct in case
of strdup failure.
<danchev@spnet.net> for the report and fix:
* plugin-runner.c (getplugin): Bug fix: Free the plugin struct in case
of strdup failure.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
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 © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer
43
37
import socket
44
import argparse
38
import optparse
45
39
import datetime
46
40
import errno
47
41
import gnutls.crypto
50
44
import gnutls.library.functions
51
45
import gnutls.library.constants
52
46
import gnutls.library.types
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
47
import ConfigParser
57
48
import sys
58
49
import re
59
50
import os
60
51
import signal
52
from sets import Set
61
53
import subprocess
62
54
import atexit
63
55
import stat
64
56
import logging
65
57
import logging.handlers
66
58
import pwd
67
import contextlib
68
import struct
69
import fcntl
70
import functools
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
75
import multiprocessing
76
import types
77
import binascii
78
import tempfile
79
import itertools
80
import collections
81
import codecs
59
from contextlib import closing
82
60
83
61
import dbus
84
62
import dbus.service
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
63
import gobject
89
64
import avahi
90
65
from dbus.mainloop.glib import DBusGMainLoop
91
66
import ctypes
92
67
import ctypes.util
93
import xml.dom.minidom
94
import inspect
95
96
try:
97
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
98
except AttributeError:
99
try:
100
from IN import SO_BINDTODEVICE
101
except ImportError:
102
SO_BINDTODEVICE = None
103
104
if sys.version_info.major == 2:
105
str = unicode
106
107
version = "1.6.9"
108
stored_state_file = "clients.pickle"
109
110
logger = logging.getLogger()
111
syslogger = None
112
113
try:
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
116
except (OSError, AttributeError):
117
118
def if_nametoindex(interface):
119
"Get an interface index the hard way, i.e. using fcntl()"
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
121
with contextlib.closing(socket.socket()) as s:
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
125
return interface_index
126
127
128
def initlogger(debug, level=logging.WARNING):
129
"""init logger and add loglevel"""
130
131
global syslogger
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
135
syslogger.setFormatter(logging.Formatter
136
('Mandos [%(process)d]: %(levelname)s:'
137
' %(message)s'))
138
logger.addHandler(syslogger)
139
140
if debug:
141
console = logging.StreamHandler()
142
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
143
' [%(process)d]:'
144
' %(levelname)s:'
145
' %(message)s'))
146
logger.addHandler(console)
147
logger.setLevel(level)
148
149
150
class PGPError(Exception):
151
"""Exception if encryption/decryption fails"""
152
pass
153
154
155
class PGPEngine(object):
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
158
def __init__(self):
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
162
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
165
166
def __enter__(self):
167
return self
168
169
def __exit__(self, exc_type, exc_value, traceback):
170
self._cleanup()
171
return False
172
173
def __del__(self):
174
self._cleanup()
175
176
def _cleanup(self):
177
if self.tempdir is not None:
178
# Delete contents of tempdir
179
for root, dirs, files in os.walk(self.tempdir,
180
topdown = False):
181
for filename in files:
182
os.remove(os.path.join(root, filename))
183
for dirname in dirs:
184
os.rmdir(os.path.join(root, dirname))
185
# Remove tempdir
186
os.rmdir(self.tempdir)
187
self.tempdir = None
188
189
def password_encode(self, password):
190
# Passphrase can not be empty and can not contain newlines or
191
# NUL bytes. So we prefix it and hex encode it.
192
encoded = b"mandos" + binascii.hexlify(password)
193
if len(encoded) > 2048:
194
# GnuPG can't handle long passwords, so encode differently
195
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
196
.replace(b"\n", b"\\n")
197
.replace(b"\0", b"\\x00"))
198
return encoded
199
200
def encrypt(self, data, password):
201
passphrase = self.password_encode(password)
202
with tempfile.NamedTemporaryFile(
203
dir=self.tempdir) as passfile:
204
passfile.write(passphrase)
205
passfile.flush()
206
proc = subprocess.Popen(['gpg', '--symmetric',
207
'--passphrase-file',
208
passfile.name]
209
+ self.gnupgargs,
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
214
if proc.returncode != 0:
215
raise PGPError(err)
216
return ciphertext
217
218
def decrypt(self, data, password):
219
passphrase = self.password_encode(password)
220
with tempfile.NamedTemporaryFile(
221
dir = self.tempdir) as passfile:
222
passfile.write(passphrase)
223
passfile.flush()
224
proc = subprocess.Popen(['gpg', '--decrypt',
225
'--passphrase-file',
226
passfile.name]
227
+ self.gnupgargs,
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
232
if proc.returncode != 0:
233
raise PGPError(err)
234
return decrypted_plaintext
235
68
69
version = "1.0.4"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
236
83
237
84
class AvahiError(Exception):
238
85
def __init__(self, value, *args, **kwargs):
239
86
self.value = value
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
87
super(AvahiError, self).__init__(value, *args, **kwargs)
88
def __unicode__(self):
89
return unicode(repr(self.value))
243
90
244
91
class AvahiServiceError(AvahiError):
245
92
pass
246
93
247
248
94
class AvahiGroupError(AvahiError):
249
95
pass
250
96
251
97
252
98
class AvahiService(object):
253
99
"""An Avahi (Zeroconf) service.
254
255
100
Attributes:
256
101
interface: integer; avahi.IF_UNSPEC or an interface index.
257
102
Used to optionally bind to the specified interface.
258
103
name: string; Example: 'Mandos'
259
104
type: string; Example: '_mandos._tcp'.
260
See <https://www.iana.org/assignments/service-names-port-numbers>
105
See <http://www.dns-sd.org/ServiceTypes.html>
261
106
port: integer; what port to announce
262
107
TXT: list of strings; TXT record for the service
263
108
domain: string; Domain to publish on, default to .local if empty.
265
110
max_renames: integer; maximum number of renames
266
111
rename_count: integer; counter so we only rename after collisions
267
112
a sensible number of times
268
group: D-Bus Entry Group
269
server: D-Bus Server
270
bus: dbus.SystemBus()
271
113
"""
272
273
def __init__(self,
274
interface = avahi.IF_UNSPEC,
275
name = None,
276
servicetype = None,
277
port = None,
278
TXT = None,
279
domain = "",
280
host = "",
281
max_renames = 32768,
282
protocol = avahi.PROTO_UNSPEC,
283
bus = None):
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
284
117
self.interface = interface
285
118
self.name = name
286
119
self.type = servicetype
290
123
self.host = host
291
124
self.rename_count = 0
292
125
self.max_renames = max_renames
293
self.protocol = protocol
294
self.group = None # our entry group
295
self.server = None
296
self.bus = bus
297
self.entry_group_state_changed_match = None
298
299
def rename(self, remove=True):
126
def rename(self):
300
127
"""Derived from the Avahi example code"""
301
128
if self.rename_count >= self.max_renames:
302
logger.critical("No suitable Zeroconf service name found"
303
" after %i retries, exiting.",
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
304
131
self.rename_count)
305
raise AvahiServiceError("Too many renames")
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
308
141
self.rename_count += 1
309
logger.info("Changing Zeroconf service name to %r ...",
310
self.name)
311
if remove:
312
self.remove()
313
try:
314
self.add()
315
except dbus.exceptions.DBusException as error:
316
if (error.get_dbus_name()
317
== "org.freedesktop.Avahi.CollisionError"):
318
logger.info("Local Zeroconf service name collision.")
319
return self.rename(remove=False)
320
else:
321
logger.critical("D-Bus Exception", exc_info=error)
322
self.cleanup()
323
os._exit(1)
324
325
142
def remove(self):
326
143
"""Derived from the Avahi example code"""
327
if self.entry_group_state_changed_match is not None:
328
self.entry_group_state_changed_match.remove()
329
self.entry_group_state_changed_match = None
330
if self.group is not None:
331
self.group.Reset()
332
144
if group is not None:
145
group.Reset()
333
146
def add(self):
334
147
"""Derived from the Avahi example code"""
335
self.remove()
336
if self.group is None:
337
self.group = dbus.Interface(
338
self.bus.get_object(avahi.DBUS_NAME,
339
self.server.EntryGroupNew()),
340
avahi.DBUS_INTERFACE_ENTRY_GROUP)
341
self.entry_group_state_changed_match = (
342
self.group.connect_to_signal(
343
'StateChanged', self.entry_group_state_changed))
344
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
345
self.name, self.type)
346
self.group.AddService(
347
self.interface,
348
self.protocol,
349
dbus.UInt32(0), # flags
350
self.name, self.type,
351
self.domain, self.host,
352
dbus.UInt16(self.port),
353
avahi.string_array_to_txt_array(self.TXT))
354
self.group.Commit()
355
356
def entry_group_state_changed(self, state, error):
357
"""Derived from the Avahi example code"""
358
logger.debug("Avahi entry group state change: %i", state)
359
360
if state == avahi.ENTRY_GROUP_ESTABLISHED:
361
logger.debug("Zeroconf service established.")
362
elif state == avahi.ENTRY_GROUP_COLLISION:
363
logger.info("Zeroconf service name collision.")
364
self.rename()
365
elif state == avahi.ENTRY_GROUP_FAILURE:
366
logger.critical("Avahi: Error in group state changed %s",
367
str(error))
368
raise AvahiGroupError("State changed: {!s}".format(error))
369
370
def cleanup(self):
371
"""Derived from the Avahi example code"""
372
if self.group is not None:
373
try:
374
self.group.Free()
375
except (dbus.exceptions.UnknownMethodException,
376
dbus.exceptions.DBusException):
377
pass
378
self.group = None
379
self.remove()
380
381
def server_state_changed(self, state, error=None):
382
"""Derived from the Avahi example code"""
383
logger.debug("Avahi server state change: %i", state)
384
bad_states = {
385
avahi.SERVER_INVALID: "Zeroconf server invalid",
386
avahi.SERVER_REGISTERING: None,
387
avahi.SERVER_COLLISION: "Zeroconf server name collision",
388
avahi.SERVER_FAILURE: "Zeroconf server failure",
389
}
390
if state in bad_states:
391
if bad_states[state] is not None:
392
if error is None:
393
logger.error(bad_states[state])
394
else:
395
logger.error(bad_states[state] + ": %r", error)
396
self.cleanup()
397
elif state == avahi.SERVER_RUNNING:
398
try:
399
self.add()
400
except dbus.exceptions.DBusException as error:
401
if (error.get_dbus_name()
402
== "org.freedesktop.Avahi.CollisionError"):
403
logger.info("Local Zeroconf service name"
404
" collision.")
405
return self.rename(remove=False)
406
else:
407
logger.critical("D-Bus Exception", exc_info=error)
408
self.cleanup()
409
os._exit(1)
410
else:
411
if error is None:
412
logger.debug("Unknown state: %r", state)
413
else:
414
logger.debug("Unknown state: %r: %r", state, error)
415
416
def activate(self):
417
"""Derived from the Avahi example code"""
418
if self.server is None:
419
self.server = dbus.Interface(
420
self.bus.get_object(avahi.DBUS_NAME,
421
avahi.DBUS_PATH_SERVER,
422
follow_name_owner_changes=True),
423
avahi.DBUS_INTERFACE_SERVER)
424
self.server.connect_to_signal("StateChanged",
425
self.server_state_changed)
426
self.server_state_changed(self.server.GetState())
427
428
429
class AvahiServiceToSyslog(AvahiService):
430
def rename(self, *args, **kwargs):
431
"""Add the new name to the syslog messages"""
432
ret = AvahiService.rename(self, *args, **kwargs)
433
syslogger.setFormatter(logging.Formatter(
434
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
435
.format(self.name)))
436
return ret
437
438
def call_pipe(connection, # : multiprocessing.Connection
439
func, *args, **kwargs):
440
"""This function is meant to be called by multiprocessing.Process
441
442
This function runs func(*args, **kwargs), and writes the resulting
443
return value on the provided multiprocessing.Connection.
444
"""
445
connection.send(func(*args, **kwargs))
446
connection.close()
447
448
class Client(object):
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
449
179
"""A representation of a client host served by this server.
450
451
180
Attributes:
452
approved: bool(); 'None' if not yet approved/disapproved
453
approval_delay: datetime.timedelta(); Time to wait for approval
454
approval_duration: datetime.timedelta(); Duration of one approval
181
name: string; from the config file, used in log messages
182
fingerprint: string (40 or 32 hexadecimal digits); used to
183
uniquely identify the client
184
secret: bytestring; sent verbatim (over TLS) to client
185
host: string; available for use by the checker command
186
created: datetime.datetime(); (UTC) object creation
187
last_enabled: datetime.datetime(); (UTC)
188
enabled: bool()
189
last_checked_ok: datetime.datetime(); (UTC) or None
190
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
192
interval: datetime.timedelta(); How often to start a new checker
193
disable_hook: If set, called by disable() as disable_hook(self)
455
194
checker: subprocess.Popen(); a running checker process used
456
195
to see if the client lives.
457
196
'None' if no process is running.
458
checker_callback_tag: a gobject event source tag, or None
459
checker_command: string; External command which is run to check
460
if client lives. %() expansions are done at
197
checker_initiator_tag: a gobject event source tag, or None
198
disable_initiator_tag: - '' -
199
checker_callback_tag: - '' -
200
checker_command: string; External command which is run to check if
201
client lives. %() expansions are done at
461
202
runtime with vars(self) as dict, so that for
462
203
instance %(name)s can be used in the command.
463
checker_initiator_tag: a gobject event source tag, or None
464
created: datetime.datetime(); (UTC) object creation
465
client_structure: Object describing what attributes a client has
466
and is used for storing the client at exit
467
current_checker_command: string; current running checker_command
468
disable_initiator_tag: a gobject event source tag, or None
469
enabled: bool()
470
fingerprint: string (40 or 32 hexadecimal digits); used to
471
uniquely identify the client
472
host: string; available for use by the checker command
473
interval: datetime.timedelta(); How often to start a new checker
474
last_approval_request: datetime.datetime(); (UTC) or None
475
last_checked_ok: datetime.datetime(); (UTC) or None
476
last_checker_status: integer between 0 and 255 reflecting exit
477
status of last checker. -1 reflects crashed
478
checker, -2 means no checker completed yet.
479
last_checker_signal: The signal which killed the last checker, if
480
last_checker_status is -1
481
last_enabled: datetime.datetime(); (UTC) or None
482
name: string; from the config file, used in log messages and
483
D-Bus identifiers
484
secret: bytestring; sent verbatim (over TLS) to client
485
timeout: datetime.timedelta(); How long from last_checked_ok
486
until this client is disabled
487
extended_timeout: extra long timeout when secret has been sent
488
runtime_expansions: Allowed attributes for runtime expansion.
489
expires: datetime.datetime(); time (UTC) when a client will be
490
disabled, or None
491
server_settings: The server_settings dict from main()
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
492
206
"""
493
494
runtime_expansions = ("approval_delay", "approval_duration",
495
"created", "enabled", "expires",
496
"fingerprint", "host", "interval",
497
"last_approval_request", "last_checked_ok",
498
"last_enabled", "name", "timeout")
499
client_defaults = {
500
"timeout": "PT5M",
501
"extended_timeout": "PT15M",
502
"interval": "PT2M",
503
"checker": "fping -q -- %%(host)s",
504
"host": "",
505
"approval_delay": "PT0S",
506
"approval_duration": "PT1S",
507
"approved_by_default": "True",
508
"enabled": "True",
509
}
510
511
@staticmethod
512
def config_parser(config):
513
"""Construct a new dict of client settings of this form:
514
{ client_name: {setting_name: value, ...}, ...}
515
with exceptions for any special settings as defined above.
516
NOTE: Must be a pure function. Must return the same result
517
value given the same arguments.
518
"""
519
settings = {}
520
for client_name in config.sections():
521
section = dict(config.items(client_name))
522
client = settings[client_name] = {}
523
524
client["host"] = section["host"]
525
# Reformat values from string types to Python types
526
client["approved_by_default"] = config.getboolean(
527
client_name, "approved_by_default")
528
client["enabled"] = config.getboolean(client_name,
529
"enabled")
530
531
# Uppercase and remove spaces from fingerprint for later
532
# comparison purposes with return value from the
533
# fingerprint() function
534
client["fingerprint"] = (section["fingerprint"].upper()
535
.replace(" ", ""))
536
if "secret" in section:
537
client["secret"] = section["secret"].decode("base64")
538
elif "secfile" in section:
539
with open(os.path.expanduser(os.path.expandvars
540
(section["secfile"])),
541
"rb") as secfile:
542
client["secret"] = secfile.read()
543
else:
544
raise TypeError("No secret or secfile for section {}"
545
.format(section))
546
client["timeout"] = string_to_delta(section["timeout"])
547
client["extended_timeout"] = string_to_delta(
548
section["extended_timeout"])
549
client["interval"] = string_to_delta(section["interval"])
550
client["approval_delay"] = string_to_delta(
551
section["approval_delay"])
552
client["approval_duration"] = string_to_delta(
553
section["approval_duration"])
554
client["checker_command"] = section["checker"]
555
client["last_approval_request"] = None
556
client["last_checked_ok"] = None
557
client["last_checker_status"] = -2
558
559
return settings
560
561
def __init__(self, settings, name = None, server_settings=None):
207
def timeout_milliseconds(self):
208
"Return the 'timeout' attribute in milliseconds"
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (self.timeout.microseconds // 1000))
212
213
def interval_milliseconds(self):
214
"Return the 'interval' attribute in milliseconds"
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
218
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
221
"""Note: the 'checker' key in 'config' sets the
222
'checker_command' attribute and *not* the 'checker'
223
attribute."""
562
224
self.name = name
563
if server_settings is None:
564
server_settings = {}
565
self.server_settings = server_settings
566
# adding all client settings
567
for setting, value in settings.items():
568
setattr(self, setting, value)
569
570
if self.enabled:
571
if not hasattr(self, "last_enabled"):
572
self.last_enabled = datetime.datetime.utcnow()
573
if not hasattr(self, "expires"):
574
self.expires = (datetime.datetime.utcnow()
575
+ self.timeout)
225
if config is None:
226
config = {}
227
logger.debug(u"Creating client %r", self.name)
228
self.use_dbus = use_dbus
229
if self.use_dbus:
230
self.dbus_object_path = (dbus.ObjectPath
231
("/Mandos/clients/"
232
+ self.name.replace(".", "_")))
233
dbus.service.Object.__init__(self, bus,
234
self.dbus_object_path)
235
# Uppercase and remove spaces from fingerprint for later
236
# comparison purposes with return value from the fingerprint()
237
# function
238
self.fingerprint = (config["fingerprint"].upper()
239
.replace(u" ", u""))
240
logger.debug(u" Fingerprint: %s", self.fingerprint)
241
if "secret" in config:
242
self.secret = config["secret"].decode(u"base64")
243
elif "secfile" in config:
244
with closing(open(os.path.expanduser
245
(os.path.expandvars
246
(config["secfile"])))) as secfile:
247
self.secret = secfile.read()
576
248
else:
577
self.last_enabled = None
578
self.expires = None
579
580
logger.debug("Creating client %r", self.name)
581
logger.debug(" Fingerprint: %s", self.fingerprint)
582
self.created = settings.get("created",
583
datetime.datetime.utcnow())
584
585
# attributes specific for this server instance
249
raise TypeError(u"No secret or secfile for client %s"
250
% self.name)
251
self.host = config.get("host", "")
252
self.created = datetime.datetime.utcnow()
253
self.enabled = False
254
self.last_enabled = None
255
self.last_checked_ok = None
256
self.timeout = string_to_delta(config["timeout"])
257
self.interval = string_to_delta(config["interval"])
258
self.disable_hook = disable_hook
586
259
self.checker = None
587
260
self.checker_initiator_tag = None
588
261
self.disable_initiator_tag = None
589
262
self.checker_callback_tag = None
590
self.current_checker_command = None
591
self.approved = None
592
self.approvals_pending = 0
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
597
if not attr.startswith("_")]
598
self.client_structure.append("client_structure")
599
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
602
if not name.startswith("_"):
603
self.client_structure.append(name)
604
605
# Send notice to process children that client state has changed
606
def send_changedstate(self):
607
with self.changedstate:
608
self.changedstate.notify_all()
263
self.checker_command = config["checker"]
609
264
610
265
def enable(self):
611
266
"""Start this client's checker and timeout hooks"""
612
if getattr(self, "enabled", False):
613
# Already enabled
614
return
615
self.expires = datetime.datetime.utcnow() + self.timeout
616
self.enabled = True
617
267
self.last_enabled = datetime.datetime.utcnow()
618
self.init_checker()
619
self.send_changedstate()
268
# Schedule a new checker to be started an 'interval' from now,
269
# and every interval from then on.
270
self.checker_initiator_tag = (gobject.timeout_add
271
(self.interval_milliseconds(),
272
self.start_checker))
273
# Also start a new checker *right now*.
274
self.start_checker()
275
# Schedule a disable() when 'timeout' has passed
276
self.disable_initiator_tag = (gobject.timeout_add
277
(self.timeout_milliseconds(),
278
self.disable))
279
self.enabled = True
280
if self.use_dbus:
281
# Emit D-Bus signals
282
self.PropertyChanged(dbus.String(u"enabled"),
283
dbus.Boolean(True, variant_level=1))
284
self.PropertyChanged(dbus.String(u"last_enabled"),
285
(_datetime_to_dbus(self.last_enabled,
286
variant_level=1)))
620
287
621
def disable(self, quiet=True):
288
def disable(self):
622
289
"""Disable this client."""
623
290
if not getattr(self, "enabled", False):
624
291
return False
625
if not quiet:
626
logger.info("Disabling client %s", self.name)
627
if getattr(self, "disable_initiator_tag", None) is not None:
292
logger.info(u"Disabling client %s", self.name)
293
if getattr(self, "disable_initiator_tag", False):
628
294
gobject.source_remove(self.disable_initiator_tag)
629
295
self.disable_initiator_tag = None
630
self.expires = None
631
if getattr(self, "checker_initiator_tag", None) is not None:
296
if getattr(self, "checker_initiator_tag", False):
632
297
gobject.source_remove(self.checker_initiator_tag)
633
298
self.checker_initiator_tag = None
634
299
self.stop_checker()
300
if self.disable_hook:
301
self.disable_hook(self)
635
302
self.enabled = False
636
if not quiet:
637
self.send_changedstate()
303
if self.use_dbus:
304
# Emit D-Bus signal
305
self.PropertyChanged(dbus.String(u"enabled"),
306
dbus.Boolean(False, variant_level=1))
638
307
# Do not run this again if called by a gobject.timeout_add
639
308
return False
640
309
641
310
def __del__(self):
311
self.disable_hook = None
642
312
self.disable()
643
313
644
def init_checker(self):
645
# Schedule a new checker to be started an 'interval' from now,
646
# and every interval from then on.
647
if self.checker_initiator_tag is not None:
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
650
int(self.interval.total_seconds() * 1000),
651
self.start_checker)
652
# Schedule a disable() when 'timeout' has passed
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
656
int(self.timeout.total_seconds() * 1000), self.disable)
657
# Also start a new checker *right now*.
658
self.start_checker()
659
660
def checker_callback(self, source, condition, connection,
661
command):
314
def checker_callback(self, pid, condition, command):
662
315
"""The checker has completed, so take appropriate actions."""
663
316
self.checker_callback_tag = None
664
317
self.checker = None
665
# Read return code from connection (see call_pipe)
666
returncode = connection.recv()
667
connection.close()
668
669
if returncode >= 0:
670
self.last_checker_status = returncode
671
self.last_checker_signal = None
672
if self.last_checker_status == 0:
673
logger.info("Checker for %(name)s succeeded",
674
vars(self))
675
self.checked_ok()
676
else:
677
logger.info("Checker for %(name)s failed", vars(self))
678
else:
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
681
logger.warning("Checker for %(name)s crashed?",
318
if self.use_dbus:
319
# Emit D-Bus signal
320
self.PropertyChanged(dbus.String(u"checker_running"),
321
dbus.Boolean(False, variant_level=1))
322
if (os.WIFEXITED(condition)
323
and (os.WEXITSTATUS(condition) == 0)):
324
logger.info(u"Checker for %(name)s succeeded",
325
vars(self))
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.CheckerCompleted(dbus.Boolean(True),
329
dbus.UInt16(condition),
330
dbus.String(command))
331
self.bump_timeout()
332
elif not os.WIFEXITED(condition):
333
logger.warning(u"Checker for %(name)s crashed?",
682
334
vars(self))
683
return False
335
if self.use_dbus:
336
# Emit D-Bus signal
337
self.CheckerCompleted(dbus.Boolean(False),
338
dbus.UInt16(condition),
339
dbus.String(command))
340
else:
341
logger.info(u"Checker for %(name)s failed",
342
vars(self))
343
if self.use_dbus:
344
# Emit D-Bus signal
345
self.CheckerCompleted(dbus.Boolean(False),
346
dbus.UInt16(condition),
347
dbus.String(command))
684
348
685
def checked_ok(self):
686
"""Assert that the client has been seen, alive and well."""
349
def bump_timeout(self):
350
"""Bump up the timeout for this client.
351
This should only be called when the client has been seen,
352
alive and well.
353
"""
687
354
self.last_checked_ok = datetime.datetime.utcnow()
688
self.last_checker_status = 0
689
self.last_checker_signal = None
690
self.bump_timeout()
691
692
def bump_timeout(self, timeout=None):
693
"""Bump up the timeout for this client."""
694
if timeout is None:
695
timeout = self.timeout
696
if self.disable_initiator_tag is not None:
697
gobject.source_remove(self.disable_initiator_tag)
698
self.disable_initiator_tag = None
699
if getattr(self, "enabled", False):
700
self.disable_initiator_tag = gobject.timeout_add(
701
int(timeout.total_seconds() * 1000), self.disable)
702
self.expires = datetime.datetime.utcnow() + timeout
703
704
def need_approval(self):
705
self.last_approval_request = datetime.datetime.utcnow()
355
gobject.source_remove(self.disable_initiator_tag)
356
self.disable_initiator_tag = (gobject.timeout_add
357
(self.timeout_milliseconds(),
358
self.disable))
359
if self.use_dbus:
360
# Emit D-Bus signal
361
self.PropertyChanged(
362
dbus.String(u"last_checked_ok"),
363
(_datetime_to_dbus(self.last_checked_ok,
364
variant_level=1)))
706
365
707
366
def start_checker(self):
708
367
"""Start a new checker subprocess if one is not running.
709
710
368
If a checker already exists, leave it running and do
711
369
nothing."""
712
370
# The reason for not killing a running checker is that if we
713
# did that, and if a checker (for some reason) started running
714
# slowly and taking more than 'interval' time, then the client
715
# would inevitably timeout, since no checker would get a
716
# chance to run to completion. If we instead leave running
371
# did that, then if a checker (for some reason) started
372
# running slowly and taking more than 'interval' time, the
373
# client would inevitably timeout, since no checker would get
374
# a chance to run to completion. If we instead leave running
717
375
# checkers alone, the checker would have to take more time
718
# than 'timeout' for the client to be disabled, which is as it
719
# should be.
720
721
if self.checker is not None and not self.checker.is_alive():
722
logger.warning("Checker was not alive; joining")
723
self.checker.join()
724
self.checker = None
725
# Start a new checker if needed
376
# than 'timeout' for the client to be declared invalid, which
377
# is as it should be.
726
378
if self.checker is None:
727
# Escape attributes for the shell
728
escaped_attrs = {
729
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
731
try:
732
command = self.checker_command % escaped_attrs
733
except TypeError as error:
734
logger.error('Could not format string "%s"',
735
self.checker_command,
736
exc_info=error)
737
return True # Try again later
738
self.current_checker_command = command
739
logger.info("Starting checker %r for %s", command,
740
self.name)
741
# We don't need to redirect stdout and stderr, since
742
# in normal mode, that is already done by daemon(),
743
# and in debug mode we don't want to. (Stdin is
744
# always replaced by /dev/null.)
745
# The exception is when not debugging but nevertheless
746
# running in the foreground; use the previously
747
# created wnull.
748
popen_args = { "close_fds": True,
749
"shell": True,
750
"cwd": "/" }
751
if (not self.server_settings["debug"]
752
and self.server_settings["foreground"]):
753
popen_args.update({"stdout": wnull,
754
"stderr": wnull })
755
pipe = multiprocessing.Pipe(duplex = False)
756
self.checker = multiprocessing.Process(
757
target = call_pipe,
758
args = (pipe[1], subprocess.call, command),
759
kwargs = popen_args)
760
self.checker.start()
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
763
self.checker_callback, pipe[0], command)
379
try:
380
# In case checker_command has exactly one % operator
381
command = self.checker_command % self.host
382
except TypeError:
383
# Escape attributes for the shell
384
escaped_attrs = dict((key, re.escape(str(val)))
385
for key, val in
386
vars(self).iteritems())
387
try:
388
command = self.checker_command % escaped_attrs
389
except TypeError, error:
390
logger.error(u'Could not format string "%s":'
391
u' %s', self.checker_command, error)
392
return True # Try again later
393
try:
394
logger.info(u"Starting checker %r for %s",
395
command, self.name)
396
# We don't need to redirect stdout and stderr, since
397
# in normal mode, that is already done by daemon(),
398
# and in debug mode we don't want to. (Stdin is
399
# always replaced by /dev/null.)
400
self.checker = subprocess.Popen(command,
401
close_fds=True,
402
shell=True, cwd="/")
403
if self.use_dbus:
404
# Emit D-Bus signal
405
self.CheckerStarted(command)
406
self.PropertyChanged(
407
dbus.String("checker_running"),
408
dbus.Boolean(True, variant_level=1))
409
self.checker_callback_tag = (gobject.child_watch_add
410
(self.checker.pid,
411
self.checker_callback,
412
data=command))
413
except OSError, error:
414
logger.error(u"Failed to start subprocess: %s",
415
error)
764
416
# Re-run this periodically if run by gobject.timeout_add
765
417
return True
766
418
771
423
self.checker_callback_tag = None
772
424
if getattr(self, "checker", None) is None:
773
425
return
774
logger.debug("Stopping checker for %(name)s", vars(self))
775
self.checker.terminate()
426
logger.debug(u"Stopping checker for %(name)s", vars(self))
427
try:
428
os.kill(self.checker.pid, signal.SIGTERM)
429
#os.sleep(0.5)
430
#if self.checker.poll() is None:
431
# os.kill(self.checker.pid, signal.SIGKILL)
432
except OSError, error:
433
if error.errno != errno.ESRCH: # No such process
434
raise
776
435
self.checker = None
777
778
779
def dbus_service_property(dbus_interface,
780
signature="v",
781
access="readwrite",
782
byte_arrays=False):
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
become properties on the D-Bus.
785
786
The decorated method will be called with no arguments by "Get"
787
and with one argument by "Set".
788
789
The parameters, where they are supported, are the same as
790
dbus.service.method, except there is only "signature", since the
791
type from Get() and the type sent to Set() is the same.
792
"""
793
# Encoding deeply encoded byte arrays is not supported yet by the
794
# "Set" method, so we fail early here:
795
if byte_arrays and signature != "ay":
796
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {!r}".format(signature))
798
799
def decorator(func):
800
func._dbus_is_property = True
801
func._dbus_interface = dbus_interface
802
func._dbus_signature = signature
803
func._dbus_access = access
804
func._dbus_name = func.__name__
805
if func._dbus_name.endswith("_dbus_property"):
806
func._dbus_name = func._dbus_name[:-14]
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
808
return func
809
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
831
return decorator
832
833
834
def dbus_annotations(annotations):
835
"""Decorator to annotate D-Bus methods, signals or properties
836
Usage:
837
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
@dbus_service_property("org.example.Interface", signature="b",
842
access="r")
843
def Property_dbus_property(self):
844
return dbus.Boolean(False)
845
"""
846
847
def decorator(func):
848
func._dbus_annotations = annotations
849
return func
850
851
return decorator
852
853
854
class DBusPropertyException(dbus.exceptions.DBusException):
855
"""A base class for D-Bus property-related exceptions
856
"""
857
pass
858
859
860
class DBusPropertyAccessException(DBusPropertyException):
861
"""A property's access permissions disallows an operation.
862
"""
863
pass
864
865
866
class DBusPropertyNotFound(DBusPropertyException):
867
"""An attempt was made to access a non-existing property.
868
"""
869
pass
870
871
872
class DBusObjectWithProperties(dbus.service.Object):
873
"""A D-Bus object with properties.
874
875
Classes inheriting from this can use the dbus_service_property
876
decorator to expose methods as D-Bus properties. It exposes the
877
standard Get(), Set(), and GetAll() methods on the D-Bus.
878
"""
879
880
@staticmethod
881
def _is_dbus_thing(thing):
882
"""Returns a function testing if an attribute is a D-Bus thing
883
884
If called like _is_dbus_thing("method") it returns a function
885
suitable for use as predicate to inspect.getmembers().
886
"""
887
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
888
False)
889
890
def _get_all_dbus_things(self, thing):
891
"""Returns a generator of (name, attribute) pairs
892
"""
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
894
athing.__get__(self))
895
for cls in self.__class__.__mro__
896
for name, athing in
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
898
899
def _get_dbus_property(self, interface_name, property_name):
900
"""Returns a bound method if one exists which is a D-Bus
901
property with the specified name and interface.
902
"""
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
906
if (value._dbus_name == property_name
907
and value._dbus_interface == interface_name):
908
return value.__get__(self)
909
910
# No such property
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
913
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
915
in_signature="ss",
916
out_signature="v")
917
def Get(self, interface_name, property_name):
918
"""Standard D-Bus property Get() method, see D-Bus standard.
919
"""
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "write":
922
raise DBusPropertyAccessException(property_name)
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
return value
926
return type(value)(value, variant_level=value.variant_level+1)
927
928
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
def Set(self, interface_name, property_name, value):
930
"""Standard D-Bus property Set() method, see D-Bus standard.
931
"""
932
prop = self._get_dbus_property(interface_name, property_name)
933
if prop._dbus_access == "read":
934
raise DBusPropertyAccessException(property_name)
935
if prop._dbus_get_args_options["byte_arrays"]:
936
# The byte_arrays option is not supported yet on
937
# signatures other than "ay".
938
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
944
prop(value)
945
946
@dbus.service.method(dbus.PROPERTIES_IFACE,
947
in_signature="s",
948
out_signature="a{sv}")
949
def GetAll(self, interface_name):
950
"""Standard D-Bus property GetAll() method, see D-Bus
951
standard.
952
953
Note: Will not include properties with access="write".
954
"""
955
properties = {}
956
for name, prop in self._get_all_dbus_things("property"):
957
if (interface_name
958
and interface_name != prop._dbus_interface):
959
# Interface non-empty but did not match
960
continue
961
# Ignore write-only properties
962
if prop._dbus_access == "write":
963
continue
964
value = prop()
965
if not hasattr(value, "variant_level"):
966
properties[name] = value
967
continue
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
970
return dbus.Dictionary(properties, signature="sv")
971
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
976
standard.
977
"""
978
pass
979
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
981
out_signature="s",
982
path_keyword='object_path',
983
connection_keyword='connection')
984
def Introspect(self, object_path, connection):
985
"""Overloading of standard D-Bus method.
986
987
Inserts property tags and interface annotation tags.
988
"""
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
990
connection)
991
try:
992
document = xml.dom.minidom.parseString(xmlstring)
993
994
def make_tag(document, name, prop):
995
e = document.createElement("property")
996
e.setAttribute("name", name)
997
e.setAttribute("type", prop._dbus_signature)
998
e.setAttribute("access", prop._dbus_access)
999
return e
1000
1001
for if_tag in document.getElementsByTagName("interface"):
1002
# Add property tags
1003
for tag in (make_tag(document, name, prop)
1004
for name, prop
1005
in self._get_all_dbus_things("property")
1006
if prop._dbus_interface
1007
== if_tag.getAttribute("name")):
1008
if_tag.appendChild(tag)
1009
# Add annotation tags
1010
for typ in ("method", "signal", "property"):
1011
for tag in if_tag.getElementsByTagName(typ):
1012
annots = dict()
1013
for name, prop in (self.
1014
_get_all_dbus_things(typ)):
1015
if (name == tag.getAttribute("name")
1016
and prop._dbus_interface
1017
== if_tag.getAttribute("name")):
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
1021
ann_tag = document.createElement(
1022
"annotation")
1023
ann_tag.setAttribute("name", name)
1024
ann_tag.setAttribute("value", value)
1025
tag.appendChild(ann_tag)
1026
# Add interface annotation tags
1027
for annotation, value in dict(
1028
itertools.chain.from_iterable(
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
1032
if name == if_tag.getAttribute("name")
1033
)).items():
1034
ann_tag = document.createElement("annotation")
1035
ann_tag.setAttribute("name", annotation)
1036
ann_tag.setAttribute("value", value)
1037
if_tag.appendChild(ann_tag)
1038
# Add the names to the return values for the
1039
# "org.freedesktop.DBus.Properties" methods
1040
if (if_tag.getAttribute("name")
1041
== "org.freedesktop.DBus.Properties"):
1042
for cn in if_tag.getElementsByTagName("method"):
1043
if cn.getAttribute("name") == "Get":
1044
for arg in cn.getElementsByTagName("arg"):
1045
if (arg.getAttribute("direction")
1046
== "out"):
1047
arg.setAttribute("name", "value")
1048
elif cn.getAttribute("name") == "GetAll":
1049
for arg in cn.getElementsByTagName("arg"):
1050
if (arg.getAttribute("direction")
1051
== "out"):
1052
arg.setAttribute("name", "props")
1053
xmlstring = document.toxml("utf-8")
1054
document.unlink()
1055
except (AttributeError, xml.dom.DOMException,
1056
xml.parsers.expat.ExpatError) as error:
1057
logger.error("Failed to override Introspection method",
1058
exc_info=error)
1059
return xmlstring
1060
1061
1062
def datetime_to_dbus(dt, variant_level=0):
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1064
if dt is None:
1065
return dbus.String("", variant_level = variant_level)
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
1067
1068
1069
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1070
"""A class decorator; applied to a subclass of
1071
dbus.service.Object, it will add alternate D-Bus attributes with
1072
interface names according to the "alt_interface_names" mapping.
1073
Usage:
1074
1075
@alternate_dbus_interfaces({"org.example.Interface":
1076
"net.example.AlternateInterface"})
1077
class SampleDBusObject(dbus.service.Object):
1078
@dbus.service.method("org.example.Interface")
1079
def SampleDBusMethod():
1080
pass
1081
1082
The above "SampleDBusMethod" on "SampleDBusObject" will be
1083
reachable via two interfaces: "org.example.Interface" and
1084
"net.example.AlternateInterface", the latter of which will have
1085
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1086
"true", unless "deprecate" is passed with a False value.
1087
1088
This works for methods and signals, and also for D-Bus properties
1089
(from DBusObjectWithProperties) and interfaces (from the
1090
dbus_interface_annotations decorator).
1091
"""
1092
1093
def wrapper(cls):
1094
for orig_interface_name, alt_interface_name in (
1095
alt_interface_names.items()):
1096
attr = {}
1097
interface_names = set()
1098
# Go though all attributes of the class
1099
for attrname, attribute in inspect.getmembers(cls):
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
1101
# with the wrong interface name
1102
if (not hasattr(attribute, "_dbus_interface")
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
1105
continue
1106
# Create an alternate D-Bus interface name based on
1107
# the current name
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1110
interface_names.add(alt_interface)
1111
# Is this a D-Bus signal?
1112
if getattr(attribute, "_dbus_is_signal", False):
1113
if sys.version_info.major == 2:
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
1117
zip(attribute.func_code.co_freevars,
1118
attribute.__closure__))
1119
["func"].cell_contents)
1120
else:
1121
nonmethod_func = attribute
1122
# Create a new, but exactly alike, function
1123
# object, and decorate it to be a new D-Bus signal
1124
# with the alternate D-Bus interface name
1125
if sys.version_info.major == 2:
1126
new_function = types.FunctionType(
1127
nonmethod_func.func_code,
1128
nonmethod_func.func_globals,
1129
nonmethod_func.func_name,
1130
nonmethod_func.func_defaults,
1131
nonmethod_func.func_closure)
1132
else:
1133
new_function = types.FunctionType(
1134
nonmethod_func.__code__,
1135
nonmethod_func.__globals__,
1136
nonmethod_func.__name__,
1137
nonmethod_func.__defaults__,
1138
nonmethod_func.__closure__)
1139
new_function = (dbus.service.signal(
1140
alt_interface,
1141
attribute._dbus_signature)(new_function))
1142
# Copy annotations, if any
1143
try:
1144
new_function._dbus_annotations = dict(
1145
attribute._dbus_annotations)
1146
except AttributeError:
1147
pass
1148
# Define a creator of a function to call both the
1149
# original and alternate functions, so both the
1150
# original and alternate signals gets sent when
1151
# the function is called
1152
def fixscope(func1, func2):
1153
"""This function is a scope container to pass
1154
func1 and func2 to the "call_both" function
1155
outside of its arguments"""
1156
1157
def call_both(*args, **kwargs):
1158
"""This function will emit two D-Bus
1159
signals by calling func1 and func2"""
1160
func1(*args, **kwargs)
1161
func2(*args, **kwargs)
1162
1163
return call_both
1164
# Create the "call_both" function and add it to
1165
# the class
1166
attr[attrname] = fixscope(attribute, new_function)
1167
# Is this a D-Bus method?
1168
elif getattr(attribute, "_dbus_is_method", False):
1169
# Create a new, but exactly alike, function
1170
# object. Decorate it to be a new D-Bus method
1171
# with the alternate D-Bus interface name. Add it
1172
# to the class.
1173
attr[attrname] = (
1174
dbus.service.method(
1175
alt_interface,
1176
attribute._dbus_in_signature,
1177
attribute._dbus_out_signature)
1178
(types.FunctionType(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
# Copy annotations, if any
1184
try:
1185
attr[attrname]._dbus_annotations = dict(
1186
attribute._dbus_annotations)
1187
except AttributeError:
1188
pass
1189
# Is this a D-Bus property?
1190
elif getattr(attribute, "_dbus_is_property", False):
1191
# Create a new, but exactly alike, function
1192
# object, and decorate it to be a new D-Bus
1193
# property with the alternate D-Bus interface
1194
# name. Add it to the class.
1195
attr[attrname] = (dbus_service_property(
1196
alt_interface, attribute._dbus_signature,
1197
attribute._dbus_access,
1198
attribute._dbus_get_args_options
1199
["byte_arrays"])
1200
(types.FunctionType(
1201
attribute.func_code,
1202
attribute.func_globals,
1203
attribute.func_name,
1204
attribute.func_defaults,
1205
attribute.func_closure)))
1206
# Copy annotations, if any
1207
try:
1208
attr[attrname]._dbus_annotations = dict(
1209
attribute._dbus_annotations)
1210
except AttributeError:
1211
pass
1212
# Is this a D-Bus interface?
1213
elif getattr(attribute, "_dbus_is_interface", False):
1214
# Create a new, but exactly alike, function
1215
# object. Decorate it to be a new D-Bus interface
1216
# with the alternate D-Bus interface name. Add it
1217
# to the class.
1218
attr[attrname] = (
1219
dbus_interface_annotations(alt_interface)
1220
(types.FunctionType(attribute.func_code,
1221
attribute.func_globals,
1222
attribute.func_name,
1223
attribute.func_defaults,
1224
attribute.func_closure)))
1225
if deprecate:
1226
# Deprecate all alternate interfaces
1227
iname="_AlternateDBusNames_interface_annotation{}"
1228
for interface_name in interface_names:
1229
1230
@dbus_interface_annotations(interface_name)
1231
def func(self):
1232
return { "org.freedesktop.DBus.Deprecated":
1233
"true" }
1234
# Find an unused name
1235
for aname in (iname.format(i)
1236
for i in itertools.count()):
1237
if aname not in attr:
1238
attr[aname] = func
1239
break
1240
if interface_names:
1241
# Replace the class with a new subclass of it with
1242
# methods, signals, etc. as created above.
1243
cls = type(b"{}Alternate".format(cls.__name__),
1244
(cls, ), attr)
1245
return cls
1246
1247
return wrapper
1248
1249
1250
@alternate_dbus_interfaces({"se.recompile.Mandos":
1251
"se.bsnet.fukt.Mandos"})
1252
class ClientDBus(Client, DBusObjectWithProperties):
1253
"""A Client class using D-Bus
1254
1255
Attributes:
1256
dbus_object_path: dbus.ObjectPath
1257
bus: dbus.SystemBus()
1258
"""
1259
1260
runtime_expansions = (Client.runtime_expansions
1261
+ ("dbus_object_path", ))
1262
1263
_interface = "se.recompile.Mandos.Client"
1264
1265
# dbus.service.Object doesn't use super(), so we can't either.
1266
1267
def __init__(self, bus = None, *args, **kwargs):
1268
self.bus = bus
1269
Client.__init__(self, *args, **kwargs)
1270
# Only now, when this client is initialized, can it show up on
1271
# the D-Bus
1272
client_object_name = str(self.name).translate(
1273
{ord("."): ord("_"),
1274
ord("-"): ord("_")})
1275
self.dbus_object_path = dbus.ObjectPath(
1276
"/clients/" + client_object_name)
1277
DBusObjectWithProperties.__init__(self, self.bus,
1278
self.dbus_object_path)
1279
1280
def notifychangeproperty(transform_func, dbus_name,
1281
type_func=lambda x: x,
1282
variant_level=1,
1283
invalidate_only=False,
1284
_interface=_interface):
1285
""" Modify a variable so that it's a property which announces
1286
its changes to DBus.
1287
1288
transform_fun: Function that takes a value and a variant_level
1289
and transforms it to a D-Bus type.
1290
dbus_name: D-Bus name of the variable
1291
type_func: Function that transform the value before sending it
1292
to the D-Bus. Default: no transform
1293
variant_level: D-Bus variant level. Default: 1
1294
"""
1295
attrname = "_{}".format(dbus_name)
1296
1297
def setter(self, value):
1298
if hasattr(self, "dbus_object_path"):
1299
if (not hasattr(self, attrname) or
1300
type_func(getattr(self, attrname, None))
1301
!= type_func(value)):
1302
if invalidate_only:
1303
self.PropertiesChanged(
1304
_interface, dbus.Dictionary(),
1305
dbus.Array((dbus_name, )))
1306
else:
1307
dbus_value = transform_func(
1308
type_func(value),
1309
variant_level = variant_level)
1310
self.PropertyChanged(dbus.String(dbus_name),
1311
dbus_value)
1312
self.PropertiesChanged(
1313
_interface,
1314
dbus.Dictionary({ dbus.String(dbus_name):
1315
dbus_value }),
1316
dbus.Array())
1317
setattr(self, attrname, value)
1318
1319
return property(lambda self: getattr(self, attrname), setter)
1320
1321
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1322
approvals_pending = notifychangeproperty(dbus.Boolean,
1323
"ApprovalPending",
1324
type_func = bool)
1325
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1326
last_enabled = notifychangeproperty(datetime_to_dbus,
1327
"LastEnabled")
1328
checker = notifychangeproperty(
1329
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
1331
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1332
"LastCheckedOK")
1333
last_checker_status = notifychangeproperty(dbus.Int16,
1334
"LastCheckerStatus")
1335
last_approval_request = notifychangeproperty(
1336
datetime_to_dbus, "LastApprovalRequest")
1337
approved_by_default = notifychangeproperty(dbus.Boolean,
1338
"ApprovedByDefault")
1339
approval_delay = notifychangeproperty(
1340
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
1342
approval_duration = notifychangeproperty(
1343
dbus.UInt64, "ApprovalDuration",
1344
type_func = lambda td: td.total_seconds() * 1000)
1345
host = notifychangeproperty(dbus.String, "Host")
1346
timeout = notifychangeproperty(
1347
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
1349
extended_timeout = notifychangeproperty(
1350
dbus.UInt64, "ExtendedTimeout",
1351
type_func = lambda td: td.total_seconds() * 1000)
1352
interval = notifychangeproperty(
1353
dbus.UInt64, "Interval",
1354
type_func = lambda td: td.total_seconds() * 1000)
1355
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
invalidate_only=True)
1358
1359
del notifychangeproperty
1360
1361
def __del__(self, *args, **kwargs):
1362
try:
1363
self.remove_from_connection()
1364
except LookupError:
1365
pass
1366
if hasattr(DBusObjectWithProperties, "__del__"):
1367
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1368
Client.__del__(self, *args, **kwargs)
1369
1370
def checker_callback(self, source, condition,
1371
connection, command, *args, **kwargs):
1372
ret = Client.checker_callback(self, source, condition,
1373
connection, command, *args,
1374
**kwargs)
1375
exitstatus = self.last_checker_status
1376
if exitstatus >= 0:
1377
# Emit D-Bus signal
1378
self.CheckerCompleted(dbus.Int16(exitstatus),
1379
dbus.Int64(0),
1380
dbus.String(command))
436
if self.use_dbus:
437
self.PropertyChanged(dbus.String(u"checker_running"),
438
dbus.Boolean(False, variant_level=1))
439
440
def still_valid(self):
441
"""Has the timeout not yet passed for this client?"""
442
if not getattr(self, "enabled", False):
443
return False
444
now = datetime.datetime.utcnow()
445
if self.last_checked_ok is None:
446
return now < (self.created + self.timeout)
1381
447
else:
1382
# Emit D-Bus signal
1383
self.CheckerCompleted(dbus.Int16(-1),
1384
dbus.Int64(
1385
self.last_checker_signal),
1386
dbus.String(command))
1387
return ret
1388
1389
def start_checker(self, *args, **kwargs):
1390
old_checker_pid = getattr(self.checker, "pid", None)
1391
r = Client.start_checker(self, *args, **kwargs)
1392
# Only if new checker process was started
1393
if (self.checker is not None
1394
and old_checker_pid != self.checker.pid):
1395
# Emit D-Bus signal
1396
self.CheckerStarted(self.current_checker_command)
1397
return r
1398
1399
def _reset_approved(self):
1400
self.approved = None
1401
return False
1402
1403
def approve(self, value=True):
1404
self.approved = value
1405
gobject.timeout_add(int(self.approval_duration.total_seconds()
1406
* 1000), self._reset_approved)
1407
self.send_changedstate()
1408
1409
## D-Bus methods, signals & properties
1410
1411
## Interfaces
1412
1413
## Signals
448
return now < (self.last_checked_ok + self.timeout)
449
450
## D-Bus methods & signals
451
_interface = u"org.mandos_system.Mandos.Client"
452
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
1414
456
1415
457
# CheckerCompleted - signal
1416
@dbus.service.signal(_interface, signature="nxs")
1417
def CheckerCompleted(self, exitcode, waitstatus, command):
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
1418
460
"D-Bus signal"
1419
461
pass
1420
462
1424
466
"D-Bus signal"
1425
467
pass
1426
468
469
# GetAllProperties - method
470
@dbus.service.method(_interface, out_signature="a{sv}")
471
def GetAllProperties(self):
472
"D-Bus method"
473
return dbus.Dictionary({
474
dbus.String("name"):
475
dbus.String(self.name, variant_level=1),
476
dbus.String("fingerprint"):
477
dbus.String(self.fingerprint, variant_level=1),
478
dbus.String("host"):
479
dbus.String(self.host, variant_level=1),
480
dbus.String("created"):
481
_datetime_to_dbus(self.created, variant_level=1),
482
dbus.String("last_enabled"):
483
(_datetime_to_dbus(self.last_enabled,
484
variant_level=1)
485
if self.last_enabled is not None
486
else dbus.Boolean(False, variant_level=1)),
487
dbus.String("enabled"):
488
dbus.Boolean(self.enabled, variant_level=1),
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
492
if self.last_checked_ok is not None
493
else dbus.Boolean (False, variant_level=1)),
494
dbus.String("timeout"):
495
dbus.UInt64(self.timeout_milliseconds(),
496
variant_level=1),
497
dbus.String("interval"):
498
dbus.UInt64(self.interval_milliseconds(),
499
variant_level=1),
500
dbus.String("checker"):
501
dbus.String(self.checker_command,
502
variant_level=1),
503
dbus.String("checker_running"):
504
dbus.Boolean(self.checker is not None,
505
variant_level=1),
506
}, signature="sv")
507
508
# IsStillValid - method
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
512
1427
513
# PropertyChanged - signal
1428
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1429
514
@dbus.service.signal(_interface, signature="sv")
1430
515
def PropertyChanged(self, property, value):
1431
516
"D-Bus signal"
1432
517
pass
1433
518
1434
# GotSecret - signal
1435
@dbus.service.signal(_interface)
1436
def GotSecret(self):
1437
"""D-Bus signal
1438
Is sent after a successful transfer of secret from the Mandos
1439
server to mandos-client
1440
"""
1441
pass
1442
1443
# Rejected - signal
1444
@dbus.service.signal(_interface, signature="s")
1445
def Rejected(self, reason):
1446
"D-Bus signal"
1447
pass
1448
1449
# NeedApproval - signal
1450
@dbus.service.signal(_interface, signature="tb")
1451
def NeedApproval(self, timeout, default):
1452
"D-Bus signal"
1453
return self.need_approval()
1454
1455
## Methods
1456
1457
# Approve - method
1458
@dbus.service.method(_interface, in_signature="b")
1459
def Approve(self, value):
1460
self.approve(value)
1461
1462
# CheckedOK - method
1463
@dbus.service.method(_interface)
1464
def CheckedOK(self):
1465
self.checked_ok()
519
# SetChecker - method
520
@dbus.service.method(_interface, in_signature="s")
521
def SetChecker(self, checker):
522
"D-Bus setter method"
523
self.checker_command = checker
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"checker"),
526
dbus.String(self.checker_command,
527
variant_level=1))
528
529
# SetHost - method
530
@dbus.service.method(_interface, in_signature="s")
531
def SetHost(self, host):
532
"D-Bus setter method"
533
self.host = host
534
# Emit D-Bus signal
535
self.PropertyChanged(dbus.String(u"host"),
536
dbus.String(self.host, variant_level=1))
537
538
# SetInterval - method
539
@dbus.service.method(_interface, in_signature="t")
540
def SetInterval(self, milliseconds):
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"interval"),
544
(dbus.UInt64(self.interval_milliseconds(),
545
variant_level=1)))
546
547
# SetSecret - method
548
@dbus.service.method(_interface, in_signature="ay",
549
byte_arrays=True)
550
def SetSecret(self, secret):
551
"D-Bus setter method"
552
self.secret = str(secret)
553
554
# SetTimeout - method
555
@dbus.service.method(_interface, in_signature="t")
556
def SetTimeout(self, milliseconds):
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
558
# Emit D-Bus signal
559
self.PropertyChanged(dbus.String(u"timeout"),
560
(dbus.UInt64(self.timeout_milliseconds(),
561
variant_level=1)))
1466
562
1467
563
# Enable - method
1468
@dbus.service.method(_interface)
1469
def Enable(self):
1470
"D-Bus method"
1471
self.enable()
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
1472
566
1473
567
# StartChecker - method
1474
568
@dbus.service.method(_interface)
1483
577
self.disable()
1484
578
1485
579
# StopChecker - method
1486
@dbus.service.method(_interface)
1487
def StopChecker(self):
1488
self.stop_checker()
1489
1490
## Properties
1491
1492
# ApprovalPending - property
1493
@dbus_service_property(_interface, signature="b", access="read")
1494
def ApprovalPending_dbus_property(self):
1495
return dbus.Boolean(bool(self.approvals_pending))
1496
1497
# ApprovedByDefault - property
1498
@dbus_service_property(_interface,
1499
signature="b",
1500
access="readwrite")
1501
def ApprovedByDefault_dbus_property(self, value=None):
1502
if value is None: # get
1503
return dbus.Boolean(self.approved_by_default)
1504
self.approved_by_default = bool(value)
1505
1506
# ApprovalDelay - property
1507
@dbus_service_property(_interface,
1508
signature="t",
1509
access="readwrite")
1510
def ApprovalDelay_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.UInt64(self.approval_delay.total_seconds()
1513
* 1000)
1514
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1515
1516
# ApprovalDuration - property
1517
@dbus_service_property(_interface,
1518
signature="t",
1519
access="readwrite")
1520
def ApprovalDuration_dbus_property(self, value=None):
1521
if value is None: # get
1522
return dbus.UInt64(self.approval_duration.total_seconds()
1523
* 1000)
1524
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1525
1526
# Name - property
1527
@dbus_service_property(_interface, signature="s", access="read")
1528
def Name_dbus_property(self):
1529
return dbus.String(self.name)
1530
1531
# Fingerprint - property
1532
@dbus_service_property(_interface, signature="s", access="read")
1533
def Fingerprint_dbus_property(self):
1534
return dbus.String(self.fingerprint)
1535
1536
# Host - property
1537
@dbus_service_property(_interface,
1538
signature="s",
1539
access="readwrite")
1540
def Host_dbus_property(self, value=None):
1541
if value is None: # get
1542
return dbus.String(self.host)
1543
self.host = str(value)
1544
1545
# Created - property
1546
@dbus_service_property(_interface, signature="s", access="read")
1547
def Created_dbus_property(self):
1548
return datetime_to_dbus(self.created)
1549
1550
# LastEnabled - property
1551
@dbus_service_property(_interface, signature="s", access="read")
1552
def LastEnabled_dbus_property(self):
1553
return datetime_to_dbus(self.last_enabled)
1554
1555
# Enabled - property
1556
@dbus_service_property(_interface,
1557
signature="b",
1558
access="readwrite")
1559
def Enabled_dbus_property(self, value=None):
1560
if value is None: # get
1561
return dbus.Boolean(self.enabled)
1562
if value:
1563
self.enable()
1564
else:
1565
self.disable()
1566
1567
# LastCheckedOK - property
1568
@dbus_service_property(_interface,
1569
signature="s",
1570
access="readwrite")
1571
def LastCheckedOK_dbus_property(self, value=None):
1572
if value is not None:
1573
self.checked_ok()
1574
return
1575
return datetime_to_dbus(self.last_checked_ok)
1576
1577
# LastCheckerStatus - property
1578
@dbus_service_property(_interface, signature="n", access="read")
1579
def LastCheckerStatus_dbus_property(self):
1580
return dbus.Int16(self.last_checker_status)
1581
1582
# Expires - property
1583
@dbus_service_property(_interface, signature="s", access="read")
1584
def Expires_dbus_property(self):
1585
return datetime_to_dbus(self.expires)
1586
1587
# LastApprovalRequest - property
1588
@dbus_service_property(_interface, signature="s", access="read")
1589
def LastApprovalRequest_dbus_property(self):
1590
return datetime_to_dbus(self.last_approval_request)
1591
1592
# Timeout - property
1593
@dbus_service_property(_interface,
1594
signature="t",
1595
access="readwrite")
1596
def Timeout_dbus_property(self, value=None):
1597
if value is None: # get
1598
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1599
old_timeout = self.timeout
1600
self.timeout = datetime.timedelta(0, 0, 0, value)
1601
# Reschedule disabling
1602
if self.enabled:
1603
now = datetime.datetime.utcnow()
1604
self.expires += self.timeout - old_timeout
1605
if self.expires <= now:
1606
# The timeout has passed
1607
self.disable()
1608
else:
1609
if (getattr(self, "disable_initiator_tag", None)
1610
is None):
1611
return
1612
gobject.source_remove(self.disable_initiator_tag)
1613
self.disable_initiator_tag = gobject.timeout_add(
1614
int((self.expires - now).total_seconds() * 1000),
1615
self.disable)
1616
1617
# ExtendedTimeout - property
1618
@dbus_service_property(_interface,
1619
signature="t",
1620
access="readwrite")
1621
def ExtendedTimeout_dbus_property(self, value=None):
1622
if value is None: # get
1623
return dbus.UInt64(self.extended_timeout.total_seconds()
1624
* 1000)
1625
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1626
1627
# Interval - property
1628
@dbus_service_property(_interface,
1629
signature="t",
1630
access="readwrite")
1631
def Interval_dbus_property(self, value=None):
1632
if value is None: # get
1633
return dbus.UInt64(self.interval.total_seconds() * 1000)
1634
self.interval = datetime.timedelta(0, 0, 0, value)
1635
if getattr(self, "checker_initiator_tag", None) is None:
1636
return
1637
if self.enabled:
1638
# Reschedule checker run
1639
gobject.source_remove(self.checker_initiator_tag)
1640
self.checker_initiator_tag = gobject.timeout_add(
1641
value, self.start_checker)
1642
self.start_checker() # Start one now, too
1643
1644
# Checker - property
1645
@dbus_service_property(_interface,
1646
signature="s",
1647
access="readwrite")
1648
def Checker_dbus_property(self, value=None):
1649
if value is None: # get
1650
return dbus.String(self.checker_command)
1651
self.checker_command = str(value)
1652
1653
# CheckerRunning - property
1654
@dbus_service_property(_interface,
1655
signature="b",
1656
access="readwrite")
1657
def CheckerRunning_dbus_property(self, value=None):
1658
if value is None: # get
1659
return dbus.Boolean(self.checker is not None)
1660
if value:
1661
self.start_checker()
1662
else:
1663
self.stop_checker()
1664
1665
# ObjectPath - property
1666
@dbus_service_property(_interface, signature="o", access="read")
1667
def ObjectPath_dbus_property(self):
1668
return self.dbus_object_path # is already a dbus.ObjectPath
1669
1670
# Secret = property
1671
@dbus_service_property(_interface,
1672
signature="ay",
1673
access="write",
1674
byte_arrays=True)
1675
def Secret_dbus_property(self, value):
1676
self.secret = bytes(value)
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
1677
582
1678
583
del _interface
1679
584
1680
585
1681
class ProxyClient(object):
1682
def __init__(self, child_pipe, fpr, address):
1683
self._pipe = child_pipe
1684
self._pipe.send(('init', fpr, address))
1685
if not self._pipe.recv():
1686
raise KeyError(fpr)
1687
1688
def __getattribute__(self, name):
1689
if name == '_pipe':
1690
return super(ProxyClient, self).__getattribute__(name)
1691
self._pipe.send(('getattr', name))
1692
data = self._pipe.recv()
1693
if data[0] == 'data':
1694
return data[1]
1695
if data[0] == 'function':
1696
1697
def func(*args, **kwargs):
1698
self._pipe.send(('funcall', name, args, kwargs))
1699
return self._pipe.recv()[1]
1700
1701
return func
1702
1703
def __setattr__(self, name, value):
1704
if name == '_pipe':
1705
return super(ProxyClient, self).__setattr__(name, value)
1706
self._pipe.send(('setattr', name, value))
1707
1708
1709
class ClientHandler(socketserver.BaseRequestHandler, object):
1710
"""A class to handle client connections.
1711
1712
Instantiated once for each connection to handle it.
586
def peer_certificate(session):
587
"Return the peer's OpenPGP certificate as a bytestring"
588
# If not an OpenPGP certificate...
589
if (gnutls.library.functions
590
.gnutls_certificate_type_get(session._c_object)
591
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
# ...do the normal thing
593
return session.peer_certificate
594
list_size = ctypes.c_uint()
595
cert_list = (gnutls.library.functions
596
.gnutls_certificate_get_peers
597
(session._c_object, ctypes.byref(list_size)))
598
if list_size.value == 0:
599
return None
600
cert = cert_list[0]
601
return ctypes.string_at(cert.data, cert.size)
602
603
604
def fingerprint(openpgp):
605
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
# New GnuTLS "datum" with the OpenPGP public key
607
datum = (gnutls.library.types
608
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
ctypes.POINTER
610
(ctypes.c_ubyte)),
611
ctypes.c_uint(len(openpgp))))
612
# New empty GnuTLS certificate
613
crt = gnutls.library.types.gnutls_openpgp_crt_t()
614
(gnutls.library.functions
615
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
616
# Import the OpenPGP public key into the certificate
617
(gnutls.library.functions
618
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
gnutls.library.constants
620
.GNUTLS_OPENPGP_FMT_RAW))
621
# Verify the self signature in the key
622
crtverify = ctypes.c_uint()
623
(gnutls.library.functions
624
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
if crtverify.value != 0:
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
raise gnutls.errors.CertificateSecurityError("Verify failed")
628
# New buffer for the fingerprint
629
buf = ctypes.create_string_buffer(20)
630
buf_len = ctypes.c_size_t()
631
# Get the fingerprint from the certificate into the buffer
632
(gnutls.library.functions
633
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
ctypes.byref(buf_len)))
635
# Deinit the certificate
636
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
637
# Convert the buffer to a Python bytestring
638
fpr = ctypes.string_at(buf, buf_len.value)
639
# Convert the bytestring to hexadecimal notation
640
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
641
return hex_fpr
642
643
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
645
"""A TCP request handler class.
646
Instantiated by IPv6_TCPServer for each request to handle it.
1713
647
Note: This will run in its own forked process."""
1714
648
1715
649
def handle(self):
1716
with contextlib.closing(self.server.child_pipe) as child_pipe:
1717
logger.info("TCP connection from: %s",
1718
str(self.client_address))
1719
logger.debug("Pipe FD: %d",
1720
self.server.child_pipe.fileno())
1721
1722
session = gnutls.connection.ClientSession(
1723
self.request, gnutls.connection .X509Credentials())
1724
1725
# Note: gnutls.connection.X509Credentials is really a
1726
# generic GnuTLS certificate credentials object so long as
1727
# no X.509 keys are added to it. Therefore, we can use it
1728
# here despite using OpenPGP certificates.
1729
1730
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1731
# "+AES-256-CBC", "+SHA1",
1732
# "+COMP-NULL", "+CTYPE-OPENPGP",
1733
# "+DHE-DSS"))
1734
# Use a fallback default, since this MUST be set.
1735
priority = self.server.gnutls_priority
1736
if priority is None:
1737
priority = "NORMAL"
1738
gnutls.library.functions.gnutls_priority_set_direct(
1739
session._c_object, priority, None)
1740
1741
# Start communication using the Mandos protocol
1742
# Get protocol number
1743
line = self.request.makefile().readline()
1744
logger.debug("Protocol version: %r", line)
1745
try:
1746
if int(line.strip().split()[0]) > 1:
1747
raise RuntimeError(line)
1748
except (ValueError, IndexError, RuntimeError) as error:
1749
logger.error("Unknown protocol version: %s", error)
1750
return
1751
1752
# Start GnuTLS connection
1753
try:
1754
session.handshake()
1755
except gnutls.errors.GNUTLSError as error:
1756
logger.warning("Handshake failed: %s", error)
1757
# Do not run session.bye() here: the session is not
1758
# established. Just abandon the request.
1759
return
1760
logger.debug("Handshake succeeded")
1761
1762
approval_required = False
1763
try:
1764
try:
1765
fpr = self.fingerprint(
1766
self.peer_certificate(session))
1767
except (TypeError,
1768
gnutls.errors.GNUTLSError) as error:
1769
logger.warning("Bad certificate: %s", error)
1770
return
1771
logger.debug("Fingerprint: %s", fpr)
1772
1773
try:
1774
client = ProxyClient(child_pipe, fpr,
1775
self.client_address)
1776
except KeyError:
1777
return
1778
1779
if client.approval_delay:
1780
delay = client.approval_delay
1781
client.approvals_pending += 1
1782
approval_required = True
1783
1784
while True:
1785
if not client.enabled:
1786
logger.info("Client %s is disabled",
1787
client.name)
1788
if self.server.use_dbus:
1789
# Emit D-Bus signal
1790
client.Rejected("Disabled")
1791
return
1792
1793
if client.approved or not client.approval_delay:
1794
#We are approved or approval is disabled
1795
break
1796
elif client.approved is None:
1797
logger.info("Client %s needs approval",
1798
client.name)
1799
if self.server.use_dbus:
1800
# Emit D-Bus signal
1801
client.NeedApproval(
1802
client.approval_delay.total_seconds()
1803
* 1000, client.approved_by_default)
1804
else:
1805
logger.warning("Client %s was not approved",
1806
client.name)
1807
if self.server.use_dbus:
1808
# Emit D-Bus signal
1809
client.Rejected("Denied")
1810
return
1811
1812
#wait until timeout or approved
1813
time = datetime.datetime.now()
1814
client.changedstate.acquire()
1815
client.changedstate.wait(delay.total_seconds())
1816
client.changedstate.release()
1817
time2 = datetime.datetime.now()
1818
if (time2 - time) >= delay:
1819
if not client.approved_by_default:
1820
logger.warning("Client %s timed out while"
1821
" waiting for approval",
1822
client.name)
1823
if self.server.use_dbus:
1824
# Emit D-Bus signal
1825
client.Rejected("Approval timed out")
1826
return
1827
else:
1828
break
1829
else:
1830
delay -= time2 - time
1831
1832
sent_size = 0
1833
while sent_size < len(client.secret):
1834
try:
1835
sent = session.send(client.secret[sent_size:])
1836
except gnutls.errors.GNUTLSError as error:
1837
logger.warning("gnutls send failed",
1838
exc_info=error)
1839
return
1840
logger.debug("Sent: %d, remaining: %d", sent,
1841
len(client.secret) - (sent_size
1842
+ sent))
1843
sent_size += sent
1844
1845
logger.info("Sending secret to %s", client.name)
1846
# bump the timeout using extended_timeout
1847
client.bump_timeout(client.extended_timeout)
1848
if self.server.use_dbus:
1849
# Emit D-Bus signal
1850
client.GotSecret()
1851
1852
finally:
1853
if approval_required:
1854
client.approvals_pending -= 1
1855
try:
1856
session.bye()
1857
except gnutls.errors.GNUTLSError as error:
1858
logger.warning("GnuTLS bye failed",
1859
exc_info=error)
1860
1861
@staticmethod
1862
def peer_certificate(session):
1863
"Return the peer's OpenPGP certificate as a bytestring"
1864
# If not an OpenPGP certificate...
1865
if (gnutls.library.functions.gnutls_certificate_type_get(
1866
session._c_object)
1867
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1868
# ...do the normal thing
1869
return session.peer_certificate
1870
list_size = ctypes.c_uint(1)
1871
cert_list = (gnutls.library.functions
1872
.gnutls_certificate_get_peers
1873
(session._c_object, ctypes.byref(list_size)))
1874
if not bool(cert_list) and list_size.value != 0:
1875
raise gnutls.errors.GNUTLSError("error getting peer"
1876
" certificate")
1877
if list_size.value == 0:
1878
return None
1879
cert = cert_list[0]
1880
return ctypes.string_at(cert.data, cert.size)
1881
1882
@staticmethod
1883
def fingerprint(openpgp):
1884
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1885
# New GnuTLS "datum" with the OpenPGP public key
1886
datum = gnutls.library.types.gnutls_datum_t(
1887
ctypes.cast(ctypes.c_char_p(openpgp),
1888
ctypes.POINTER(ctypes.c_ubyte)),
1889
ctypes.c_uint(len(openpgp)))
1890
# New empty GnuTLS certificate
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1893
ctypes.byref(crt))
1894
# Import the OpenPGP public key into the certificate
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1898
# Verify the self signature in the key
1899
crtverify = ctypes.c_uint()
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
1902
if crtverify.value != 0:
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1904
raise gnutls.errors.CertificateSecurityError(
1905
"Verify failed")
1906
# New buffer for the fingerprint
1907
buf = ctypes.create_string_buffer(20)
1908
buf_len = ctypes.c_size_t()
1909
# Get the fingerprint from the certificate into the buffer
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1912
# Deinit the certificate
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1914
# Convert the buffer to a Python bytestring
1915
fpr = ctypes.string_at(buf, buf_len.value)
1916
# Convert the bytestring to hexadecimal notation
1917
hex_fpr = binascii.hexlify(fpr).upper()
1918
return hex_fpr
1919
1920
1921
class MultiprocessingMixIn(object):
1922
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1923
1924
def sub_process_main(self, request, address):
1925
try:
1926
self.finish_request(request, address)
1927
except Exception:
1928
self.handle_error(request, address)
1929
self.close_request(request)
1930
1931
def process_request(self, request, address):
1932
"""Start a new process to process the request."""
1933
proc = multiprocessing.Process(target = self.sub_process_main,
1934
args = (request, address))
1935
proc.start()
1936
return proc
1937
1938
1939
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1940
""" adds a pipe to the MixIn """
1941
1942
def process_request(self, request, client_address):
1943
"""Overrides and wraps the original process_request().
1944
1945
This function creates a new pipe in self.pipe
1946
"""
1947
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1948
1949
proc = MultiprocessingMixIn.process_request(self, request,
1950
client_address)
1951
self.child_pipe.close()
1952
self.add_pipe(parent_pipe, proc)
1953
1954
def add_pipe(self, parent_pipe, proc):
1955
"""Dummy function; override as necessary"""
1956
raise NotImplementedError()
1957
1958
1959
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1960
socketserver.TCPServer, object):
1961
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1962
650
logger.info(u"TCP connection from: %s",
651
unicode(self.client_address))
652
session = (gnutls.connection
653
.ClientSession(self.request,
654
gnutls.connection
655
.X509Credentials()))
656
657
line = self.request.makefile().readline()
658
logger.debug(u"Protocol version: %r", line)
659
try:
660
if int(line.strip().split()[0]) > 1:
661
raise RuntimeError
662
except (ValueError, IndexError, RuntimeError), error:
663
logger.error(u"Unknown protocol version: %s", error)
664
return
665
666
# Note: gnutls.connection.X509Credentials is really a generic
667
# GnuTLS certificate credentials object so long as no X.509
668
# keys are added to it. Therefore, we can use it here despite
669
# using OpenPGP certificates.
670
671
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
672
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
673
# "+DHE-DSS"))
674
# Use a fallback default, since this MUST be set.
675
priority = self.server.settings.get("priority", "NORMAL")
676
(gnutls.library.functions
677
.gnutls_priority_set_direct(session._c_object,
678
priority, None))
679
680
try:
681
session.handshake()
682
except gnutls.errors.GNUTLSError, error:
683
logger.warning(u"Handshake failed: %s", error)
684
# Do not run session.bye() here: the session is not
685
# established. Just abandon the request.
686
return
687
try:
688
fpr = fingerprint(peer_certificate(session))
689
except (TypeError, gnutls.errors.GNUTLSError), error:
690
logger.warning(u"Bad certificate: %s", error)
691
session.bye()
692
return
693
logger.debug(u"Fingerprint: %s", fpr)
694
for c in self.server.clients:
695
if c.fingerprint == fpr:
696
client = c
697
break
698
else:
699
logger.warning(u"Client not found for fingerprint: %s",
700
fpr)
701
session.bye()
702
return
703
# Have to check if client.still_valid(), since it is possible
704
# that the client timed out while establishing the GnuTLS
705
# session.
706
if not client.still_valid():
707
logger.warning(u"Client %(name)s is invalid",
708
vars(client))
709
session.bye()
710
return
711
## This won't work here, since we're in a fork.
712
# client.bump_timeout()
713
sent_size = 0
714
while sent_size < len(client.secret):
715
sent = session.send(client.secret[sent_size:])
716
logger.debug(u"Sent: %d, remaining: %d",
717
sent, len(client.secret)
718
- (sent_size + sent))
719
sent_size += sent
720
session.bye()
721
722
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
SocketServer.TCPServer, object):
725
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1963
726
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
1964
729
enabled: Boolean; whether this server is activated yet
1965
interface: None or a network interface name (string)
1966
use_ipv6: Boolean; to use IPv6 or not
1967
730
"""
1968
1969
def __init__(self, server_address, RequestHandlerClass,
1970
interface=None,
1971
use_ipv6=True,
1972
socketfd=None):
1973
"""If socketfd is set, use that file descriptor instead of
1974
creating a new one with socket.socket().
1975
"""
1976
self.interface = interface
1977
if use_ipv6:
1978
self.address_family = socket.AF_INET6
1979
if socketfd is not None:
1980
# Save the file descriptor
1981
self.socketfd = socketfd
1982
# Save the original socket.socket() function
1983
self.socket_socket = socket.socket
1984
# To implement --socket, we monkey patch socket.socket.
1985
#
1986
# (When socketserver.TCPServer is a new-style class, we
1987
# could make self.socket into a property instead of monkey
1988
# patching socket.socket.)
1989
#
1990
# Create a one-time-only replacement for socket.socket()
1991
@functools.wraps(socket.socket)
1992
def socket_wrapper(*args, **kwargs):
1993
# Restore original function so subsequent calls are
1994
# not affected.
1995
socket.socket = self.socket_socket
1996
del self.socket_socket
1997
# This time only, return a new socket object from the
1998
# saved file descriptor.
1999
return socket.fromfd(self.socketfd, *args, **kwargs)
2000
# Replace socket.socket() function with wrapper
2001
socket.socket = socket_wrapper
2002
# The socketserver.TCPServer.__init__ will call
2003
# socket.socket(), which might be our replacement,
2004
# socket_wrapper(), if socketfd was set.
2005
socketserver.TCPServer.__init__(self, server_address,
2006
RequestHandlerClass)
2007
731
address_family = socket.AF_INET6
732
def __init__(self, *args, **kwargs):
733
if "settings" in kwargs:
734
self.settings = kwargs["settings"]
735
del kwargs["settings"]
736
if "clients" in kwargs:
737
self.clients = kwargs["clients"]
738
del kwargs["clients"]
739
self.enabled = False
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2008
741
def server_bind(self):
2009
742
"""This overrides the normal server_bind() function
2010
743
to bind to an interface if one was specified, and also NOT to
2011
744
bind to an address or port if they were not specified."""
2012
if self.interface is not None:
2013
if SO_BINDTODEVICE is None:
2014
logger.error("SO_BINDTODEVICE does not exist;"
2015
" cannot bind to interface %s",
2016
self.interface)
2017
else:
2018
try:
2019
self.socket.setsockopt(
2020
socket.SOL_SOCKET, SO_BINDTODEVICE,
2021
(self.interface + "\0").encode("utf-8"))
2022
except socket.error as error:
2023
if error.errno == errno.EPERM:
2024
logger.error("No permission to bind to"
2025
" interface %s", self.interface)
2026
elif error.errno == errno.ENOPROTOOPT:
2027
logger.error("SO_BINDTODEVICE not available;"
2028
" cannot bind to interface %s",
2029
self.interface)
2030
elif error.errno == errno.ENODEV:
2031
logger.error("Interface %s does not exist,"
2032
" cannot bind", self.interface)
2033
else:
2034
raise
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
748
try:
749
self.socket.setsockopt(socket.SOL_SOCKET,
750
SO_BINDTODEVICE,
751
self.settings["interface"])
752
except socket.error, error:
753
if error[0] == errno.EPERM:
754
logger.error(u"No permission to"
755
u" bind to interface %s",
756
self.settings["interface"])
757
else:
758
raise error
2035
759
# Only bind(2) the socket if we really need to.
2036
760
if self.server_address[0] or self.server_address[1]:
2037
761
if not self.server_address[0]:
2038
if self.address_family == socket.AF_INET6:
2039
any_address = "::" # in6addr_any
2040
else:
2041
any_address = "0.0.0.0" # INADDR_ANY
2042
self.server_address = (any_address,
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
2043
764
self.server_address[1])
2044
765
elif not self.server_address[1]:
2045
self.server_address = (self.server_address[0], 0)
2046
# if self.interface:
766
self.server_address = (self.server_address[0],
767
0)
768
# if self.settings["interface"]:
2047
769
# self.server_address = (self.server_address[0],
2048
770
# 0, # port
2049
771
# 0, # flowinfo
2050
772
# if_nametoindex
2051
# (self.interface))
2052
return socketserver.TCPServer.server_bind(self)
2053
2054
2055
class MandosServer(IPv6_TCPServer):
2056
"""Mandos server.
2057
2058
Attributes:
2059
clients: set of Client objects
2060
gnutls_priority GnuTLS priority string
2061
use_dbus: Boolean; to emit D-Bus signals or not
2062
2063
Assumes a gobject.MainLoop event loop.
2064
"""
2065
2066
def __init__(self, server_address, RequestHandlerClass,
2067
interface=None,
2068
use_ipv6=True,
2069
clients=None,
2070
gnutls_priority=None,
2071
use_dbus=True,
2072
socketfd=None):
2073
self.enabled = False
2074
self.clients = clients
2075
if self.clients is None:
2076
self.clients = {}
2077
self.use_dbus = use_dbus
2078
self.gnutls_priority = gnutls_priority
2079
IPv6_TCPServer.__init__(self, server_address,
2080
RequestHandlerClass,
2081
interface = interface,
2082
use_ipv6 = use_ipv6,
2083
socketfd = socketfd)
2084
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
2085
776
def server_activate(self):
2086
777
if self.enabled:
2087
return socketserver.TCPServer.server_activate(self)
2088
778
return super(IPv6_TCPServer, self).server_activate()
2089
779
def enable(self):
2090
780
self.enabled = True
2091
2092
def add_pipe(self, parent_pipe, proc):
2093
# Call "handle_ipc" for both data and EOF events
2094
gobject.io_add_watch(
2095
parent_pipe.fileno(),
2096
gobject.IO_IN | gobject.IO_HUP,
2097
functools.partial(self.handle_ipc,
2098
parent_pipe = parent_pipe,
2099
proc = proc))
2100
2101
def handle_ipc(self, source, condition,
2102
parent_pipe=None,
2103
proc = None,
2104
client_object=None):
2105
# error, or the other end of multiprocessing.Pipe has closed
2106
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2107
# Wait for other process to exit
2108
proc.join()
2109
return False
2110
2111
# Read a request from the child
2112
request = parent_pipe.recv()
2113
command = request[0]
2114
2115
if command == 'init':
2116
fpr = request[1]
2117
address = request[2]
2118
2119
for c in self.clients.itervalues():
2120
if c.fingerprint == fpr:
2121
client = c
2122
break
2123
else:
2124
logger.info("Client not found for fingerprint: %s, ad"
2125
"dress: %s", fpr, address)
2126
if self.use_dbus:
2127
# Emit D-Bus signal
2128
mandos_dbus_service.ClientNotFound(fpr,
2129
address[0])
2130
parent_pipe.send(False)
2131
return False
2132
2133
gobject.io_add_watch(
2134
parent_pipe.fileno(),
2135
gobject.IO_IN | gobject.IO_HUP,
2136
functools.partial(self.handle_ipc,
2137
parent_pipe = parent_pipe,
2138
proc = proc,
2139
client_object = client))
2140
parent_pipe.send(True)
2141
# remove the old hook in favor of the new above hook on
2142
# same fileno
2143
return False
2144
if command == 'funcall':
2145
funcname = request[1]
2146
args = request[2]
2147
kwargs = request[3]
2148
2149
parent_pipe.send(('data', getattr(client_object,
2150
funcname)(*args,
2151
**kwargs)))
2152
2153
if command == 'getattr':
2154
attrname = request[1]
2155
if isinstance(client_object.__getattribute__(attrname),
2156
collections.Callable):
2157
parent_pipe.send(('function', ))
2158
else:
2159
parent_pipe.send((
2160
'data', client_object.__getattribute__(attrname)))
2161
2162
if command == 'setattr':
2163
attrname = request[1]
2164
value = request[2]
2165
setattr(client_object, attrname, value)
2166
2167
return True
2168
2169
2170
def rfc3339_duration_to_delta(duration):
2171
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2172
2173
>>> rfc3339_duration_to_delta("P7D")
2174
datetime.timedelta(7)
2175
>>> rfc3339_duration_to_delta("PT60S")
2176
datetime.timedelta(0, 60)
2177
>>> rfc3339_duration_to_delta("PT60M")
2178
datetime.timedelta(0, 3600)
2179
>>> rfc3339_duration_to_delta("PT24H")
2180
datetime.timedelta(1)
2181
>>> rfc3339_duration_to_delta("P1W")
2182
datetime.timedelta(7)
2183
>>> rfc3339_duration_to_delta("PT5M30S")
2184
datetime.timedelta(0, 330)
2185
>>> rfc3339_duration_to_delta("P1DT3M20S")
2186
datetime.timedelta(1, 200)
2187
"""
2188
2189
# Parsing an RFC 3339 duration with regular expressions is not
2190
# possible - there would have to be multiple places for the same
2191
# values, like seconds. The current code, while more esoteric, is
2192
# cleaner without depending on a parsing library. If Python had a
2193
# built-in library for parsing we would use it, but we'd like to
2194
# avoid excessive use of external libraries.
2195
2196
# New type for defining tokens, syntax, and semantics all-in-one
2197
Token = collections.namedtuple("Token", (
2198
"regexp", # To match token; if "value" is not None, must have
2199
# a "group" containing digits
2200
"value", # datetime.timedelta or None
2201
"followers")) # Tokens valid after this token
2202
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2203
# the "duration" ABNF definition in RFC 3339, Appendix A.
2204
token_end = Token(re.compile(r"$"), None, frozenset())
2205
token_second = Token(re.compile(r"(\d+)S"),
2206
datetime.timedelta(seconds=1),
2207
frozenset((token_end, )))
2208
token_minute = Token(re.compile(r"(\d+)M"),
2209
datetime.timedelta(minutes=1),
2210
frozenset((token_second, token_end)))
2211
token_hour = Token(re.compile(r"(\d+)H"),
2212
datetime.timedelta(hours=1),
2213
frozenset((token_minute, token_end)))
2214
token_time = Token(re.compile(r"T"),
2215
None,
2216
frozenset((token_hour, token_minute,
2217
token_second)))
2218
token_day = Token(re.compile(r"(\d+)D"),
2219
datetime.timedelta(days=1),
2220
frozenset((token_time, token_end)))
2221
token_month = Token(re.compile(r"(\d+)M"),
2222
datetime.timedelta(weeks=4),
2223
frozenset((token_day, token_end)))
2224
token_year = Token(re.compile(r"(\d+)Y"),
2225
datetime.timedelta(weeks=52),
2226
frozenset((token_month, token_end)))
2227
token_week = Token(re.compile(r"(\d+)W"),
2228
datetime.timedelta(weeks=1),
2229
frozenset((token_end, )))
2230
token_duration = Token(re.compile(r"P"), None,
2231
frozenset((token_year, token_month,
2232
token_day, token_time,
2233
token_week)))
2234
# Define starting values
2235
value = datetime.timedelta() # Value so far
2236
found_token = None
2237
followers = frozenset((token_duration, )) # Following valid tokens
2238
s = duration # String left to parse
2239
# Loop until end token is found
2240
while found_token is not token_end:
2241
# Search for any currently valid tokens
2242
for token in followers:
2243
match = token.regexp.match(s)
2244
if match is not None:
2245
# Token found
2246
if token.value is not None:
2247
# Value found, parse digits
2248
factor = int(match.group(1), 10)
2249
# Add to value so far
2250
value += factor * token.value
2251
# Strip token from string
2252
s = token.regexp.sub("", s, 1)
2253
# Go to found token
2254
found_token = token
2255
# Set valid next tokens
2256
followers = found_token.followers
2257
break
2258
else:
2259
# No currently valid tokens were found
2260
raise ValueError("Invalid RFC 3339 duration: {!r}"
2261
.format(duration))
2262
# End token found
2263
return value
2264
781
2265
782
2266
783
def string_to_delta(interval):
2267
784
"""Parse a string and return a datetime.timedelta
2268
785
2269
786
>>> string_to_delta('7d')
2270
787
datetime.timedelta(7)
2271
788
>>> string_to_delta('60s')
2274
791
datetime.timedelta(0, 3600)
2275
792
>>> string_to_delta('24h')
2276
793
datetime.timedelta(1)
2277
>>> string_to_delta('1w')
794
>>> string_to_delta(u'1w')
2278
795
datetime.timedelta(7)
2279
796
>>> string_to_delta('5m 30s')
2280
797
datetime.timedelta(0, 330)
2281
798
"""
2282
2283
try:
2284
return rfc3339_duration_to_delta(interval)
2285
except ValueError:
2286
pass
2287
2288
799
timevalue = datetime.timedelta(0)
2289
800
for s in interval.split():
2290
801
try:
2291
suffix = s[-1]
802
suffix = unicode(s[-1])
2292
803
value = int(s[:-1])
2293
if suffix == "d":
804
if suffix == u"d":
2294
805
delta = datetime.timedelta(value)
2295
elif suffix == "s":
806
elif suffix == u"s":
2296
807
delta = datetime.timedelta(0, value)
2297
elif suffix == "m":
808
elif suffix == u"m":
2298
809
delta = datetime.timedelta(0, 0, 0, 0, value)
2299
elif suffix == "h":
810
elif suffix == u"h":
2300
811
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2301
elif suffix == "w":
812
elif suffix == u"w":
2302
813
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2303
814
else:
2304
raise ValueError("Unknown suffix {!r}".format(suffix))
2305
except IndexError as e:
2306
raise ValueError(*(e.args))
815
raise ValueError
816
except (ValueError, IndexError):
817
raise ValueError
2307
818
timevalue += delta
2308
819
return timevalue
2309
820
2310
821
822
def server_state_changed(state):
823
"""Derived from the Avahi example code"""
824
if state == avahi.SERVER_COLLISION:
825
logger.error(u"Zeroconf server name collision")
826
service.remove()
827
elif state == avahi.SERVER_RUNNING:
828
service.add()
829
830
831
def entry_group_state_changed(state, error):
832
"""Derived from the Avahi example code"""
833
logger.debug(u"Avahi state change: %i", state)
834
835
if state == avahi.ENTRY_GROUP_ESTABLISHED:
836
logger.debug(u"Zeroconf service established.")
837
elif state == avahi.ENTRY_GROUP_COLLISION:
838
logger.warning(u"Zeroconf service name collision.")
839
service.rename()
840
elif state == avahi.ENTRY_GROUP_FAILURE:
841
logger.critical(u"Avahi: Error in group state changed %s",
842
unicode(error))
843
raise AvahiGroupError(u"State changed: %s" % unicode(error))
844
845
def if_nametoindex(interface):
846
"""Call the C function if_nametoindex(), or equivalent"""
847
global if_nametoindex
848
try:
849
if_nametoindex = (ctypes.cdll.LoadLibrary
850
(ctypes.util.find_library("c"))
851
.if_nametoindex)
852
except (OSError, AttributeError):
853
if "struct" not in sys.modules:
854
import struct
855
if "fcntl" not in sys.modules:
856
import fcntl
857
def if_nametoindex(interface):
858
"Get an interface index the hard way, i.e. using fcntl()"
859
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
860
with closing(socket.socket()) as s:
861
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
864
return interface_index
865
return if_nametoindex(interface)
866
867
2311
868
def daemon(nochdir = False, noclose = False):
2312
869
"""See daemon(3). Standard BSD Unix function.
2313
2314
870
This should really exist as os.daemon, but it doesn't (yet)."""
2315
871
if os.fork():
2316
872
sys.exit()
2321
877
sys.exit()
2322
878
if not noclose:
2323
879
# Close all standard open file descriptors
2324
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
880
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2325
881
if not stat.S_ISCHR(os.fstat(null).st_mode):
2326
882
raise OSError(errno.ENODEV,
2327
"{} not a character device"
2328
.format(os.devnull))
883
"/dev/null not a character device")
2329
884
os.dup2(null, sys.stdin.fileno())
2330
885
os.dup2(null, sys.stdout.fileno())
2331
886
os.dup2(null, sys.stderr.fileno())
2334
889
2335
890
2336
891
def main():
2337
2338
##################################################################
2339
# Parsing of options, both command line and config file
2340
2341
parser = argparse.ArgumentParser()
2342
parser.add_argument("-v", "--version", action="version",
2343
version = "%(prog)s {}".format(version),
2344
help="show version number and exit")
2345
parser.add_argument("-i", "--interface", metavar="IF",
2346
help="Bind to interface IF")
2347
parser.add_argument("-a", "--address",
2348
help="Address to listen for requests on")
2349
parser.add_argument("-p", "--port", type=int,
2350
help="Port number to receive requests on")
2351
parser.add_argument("--check", action="store_true",
2352
help="Run self-test")
2353
parser.add_argument("--debug", action="store_true",
2354
help="Debug mode; run in foreground and log"
2355
" to terminal", default=None)
2356
parser.add_argument("--debuglevel", metavar="LEVEL",
2357
help="Debug level for stdout output")
2358
parser.add_argument("--priority", help="GnuTLS"
2359
" priority string (see GnuTLS documentation)")
2360
parser.add_argument("--servicename",
2361
metavar="NAME", help="Zeroconf service name")
2362
parser.add_argument("--configdir",
2363
default="/etc/mandos", metavar="DIR",
2364
help="Directory to search for configuration"
2365
" files")
2366
parser.add_argument("--no-dbus", action="store_false",
2367
dest="use_dbus", help="Do not provide D-Bus"
2368
" system bus interface", default=None)
2369
parser.add_argument("--no-ipv6", action="store_false",
2370
dest="use_ipv6", help="Do not use IPv6",
2371
default=None)
2372
parser.add_argument("--no-restore", action="store_false",
2373
dest="restore", help="Do not restore stored"
2374
" state", default=None)
2375
parser.add_argument("--socket", type=int,
2376
help="Specify a file descriptor to a network"
2377
" socket to use instead of creating one")
2378
parser.add_argument("--statedir", metavar="DIR",
2379
help="Directory to save/restore state in")
2380
parser.add_argument("--foreground", action="store_true",
2381
help="Run in foreground", default=None)
2382
parser.add_argument("--no-zeroconf", action="store_false",
2383
dest="zeroconf", help="Do not use Zeroconf",
2384
default=None)
2385
2386
options = parser.parse_args()
892
parser = optparse.OptionParser(version = "%%prog %s" % version)
893
parser.add_option("-i", "--interface", type="string",
894
metavar="IF", help="Bind to interface IF")
895
parser.add_option("-a", "--address", type="string",
896
help="Address to listen for requests on")
897
parser.add_option("-p", "--port", type="int",
898
help="Port number to receive requests on")
899
parser.add_option("--check", action="store_true",
900
help="Run self-test")
901
parser.add_option("--debug", action="store_true",
902
help="Debug mode; run in foreground and log to"
903
" terminal")
904
parser.add_option("--priority", type="string", help="GnuTLS"
905
" priority string (see GnuTLS documentation)")
906
parser.add_option("--servicename", type="string", metavar="NAME",
907
help="Zeroconf service name")
908
parser.add_option("--configdir", type="string",
909
default="/etc/mandos", metavar="DIR",
910
help="Directory to search for configuration"
911
" files")
912
parser.add_option("--no-dbus", action="store_false",
913
dest="use_dbus",
914
help="Do not provide D-Bus system bus"
915
" interface")
916
options = parser.parse_args()[0]
2387
917
2388
918
if options.check:
2389
919
import doctest
2390
fail_count, test_count = doctest.testmod()
2391
sys.exit(os.EX_OK if fail_count == 0 else 1)
920
doctest.testmod()
921
sys.exit()
2392
922
2393
923
# Default values for config file for server-global settings
2394
924
server_defaults = { "interface": "",
2396
926
"port": "",
2397
927
"debug": "False",
2398
928
"priority":
2399
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2400
":+SIGN-DSA-SHA256",
929
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2401
930
"servicename": "Mandos",
2402
931
"use_dbus": "True",
2403
"use_ipv6": "True",
2404
"debuglevel": "",
2405
"restore": "True",
2406
"socket": "",
2407
"statedir": "/var/lib/mandos",
2408
"foreground": "False",
2409
"zeroconf": "True",
2410
}
932
}
2411
933
2412
934
# Parse config file for server-global settings
2413
server_config = configparser.SafeConfigParser(server_defaults)
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
2414
936
del server_defaults
2415
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2416
938
# Convert the SafeConfigParser object to a dict
2417
939
server_settings = server_config.defaults()
2418
# Use the appropriate methods on the non-string config options
2419
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2420
server_settings[option] = server_config.getboolean("DEFAULT",
2421
option)
2422
if server_settings["port"]:
2423
server_settings["port"] = server_config.getint("DEFAULT",
2424
"port")
2425
if server_settings["socket"]:
2426
server_settings["socket"] = server_config.getint("DEFAULT",
2427
"socket")
2428
# Later, stdin will, and stdout and stderr might, be dup'ed
2429
# over with an opened os.devnull. But we don't want this to
2430
# happen with a supplied network socket.
2431
if 0 <= server_settings["socket"] <= 2:
2432
server_settings["socket"] = os.dup(server_settings
2433
["socket"])
940
# Use getboolean on the boolean config options
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
943
server_settings["use_dbus"] = (server_config.getboolean
944
("DEFAULT", "use_dbus"))
2434
945
del server_config
2435
946
2436
947
# Override the settings from the config file with command line
2437
948
# options, if set.
2438
949
for option in ("interface", "address", "port", "debug",
2439
"priority", "servicename", "configdir", "use_dbus",
2440
"use_ipv6", "debuglevel", "restore", "statedir",
2441
"socket", "foreground", "zeroconf"):
950
"priority", "servicename", "configdir",
951
"use_dbus"):
2442
952
value = getattr(options, option)
2443
953
if value is not None:
2444
954
server_settings[option] = value
2445
955
del options
2446
# Force all strings to be unicode
2447
for option in server_settings.keys():
2448
if isinstance(server_settings[option], bytes):
2449
server_settings[option] = (server_settings[option]
2450
.decode("utf-8"))
2451
# Force all boolean options to be boolean
2452
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2453
"foreground", "zeroconf"):
2454
server_settings[option] = bool(server_settings[option])
2455
# Debug implies foreground
2456
if server_settings["debug"]:
2457
server_settings["foreground"] = True
2458
956
# Now we have our good server settings in "server_settings"
2459
957
2460
##################################################################
2461
2462
if (not server_settings["zeroconf"]
2463
and not (server_settings["port"]
2464
or server_settings["socket"] != "")):
2465
parser.error("Needs port or socket to work without Zeroconf")
2466
2467
958
# For convenience
2468
959
debug = server_settings["debug"]
2469
debuglevel = server_settings["debuglevel"]
2470
960
use_dbus = server_settings["use_dbus"]
2471
use_ipv6 = server_settings["use_ipv6"]
2472
stored_state_path = os.path.join(server_settings["statedir"],
2473
stored_state_file)
2474
foreground = server_settings["foreground"]
2475
zeroconf = server_settings["zeroconf"]
2476
961
2477
if debug:
2478
initlogger(debug, logging.DEBUG)
2479
else:
2480
if not debuglevel:
2481
initlogger(debug)
2482
else:
2483
level = getattr(logging, debuglevel.upper())
2484
initlogger(debug, level)
962
if not debug:
963
syslogger.setLevel(logging.WARNING)
964
console.setLevel(logging.WARNING)
2485
965
2486
966
if server_settings["servicename"] != "Mandos":
2487
syslogger.setFormatter(
2488
logging.Formatter('Mandos ({}) [%(process)d]:'
2489
' %(levelname)s: %(message)s'.format(
2490
server_settings["servicename"])))
967
syslogger.setFormatter(logging.Formatter
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
970
% server_settings["servicename"]))
2491
971
2492
972
# Parse config file with clients
2493
client_config = configparser.SafeConfigParser(Client
2494
.client_defaults)
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %%(host)s",
976
"host": "",
977
}
978
client_config = ConfigParser.SafeConfigParser(client_defaults)
2495
979
client_config.read(os.path.join(server_settings["configdir"],
2496
980
"clients.conf"))
2497
981
2498
global mandos_dbus_service
2499
mandos_dbus_service = None
2500
2501
socketfd = None
2502
if server_settings["socket"] != "":
2503
socketfd = server_settings["socket"]
2504
tcp_server = MandosServer(
2505
(server_settings["address"], server_settings["port"]),
2506
ClientHandler,
2507
interface=(server_settings["interface"] or None),
2508
use_ipv6=use_ipv6,
2509
gnutls_priority=server_settings["priority"],
2510
use_dbus=use_dbus,
2511
socketfd=socketfd)
2512
if not foreground:
2513
pidfilename = "/run/mandos.pid"
2514
if not os.path.isdir("/run/."):
2515
pidfilename = "/var/run/mandos.pid"
2516
pidfile = None
2517
try:
2518
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2519
except IOError as e:
2520
logger.error("Could not open file %r", pidfilename,
2521
exc_info=e)
2522
2523
for name in ("_mandos", "mandos", "nobody"):
2524
try:
2525
uid = pwd.getpwnam(name).pw_uid
2526
gid = pwd.getpwnam(name).pw_gid
2527
break
982
clients = Set()
983
tcp_server = IPv6_TCPServer((server_settings["address"],
984
server_settings["port"]),
985
TCP_handler,
986
settings=server_settings,
987
clients=clients)
988
pidfilename = "/var/run/mandos.pid"
989
try:
990
pidfile = open(pidfilename, "w")
991
except IOError, error:
992
logger.error("Could not open file %r", pidfilename)
993
994
try:
995
uid = pwd.getpwnam("_mandos").pw_uid
996
gid = pwd.getpwnam("_mandos").pw_gid
997
except KeyError:
998
try:
999
uid = pwd.getpwnam("mandos").pw_uid
1000
gid = pwd.getpwnam("mandos").pw_gid
2528
1001
except KeyError:
2529
continue
2530
else:
2531
uid = 65534
2532
gid = 65534
1002
try:
1003
uid = pwd.getpwnam("nobody").pw_uid
1004
gid = pwd.getpwnam("nogroup").pw_gid
1005
except KeyError:
1006
uid = 65534
1007
gid = 65534
2533
1008
try:
1009
os.setuid(uid)
2534
1010
os.setgid(gid)
2535
os.setuid(uid)
2536
except OSError as error:
2537
if error.errno != errno.EPERM:
2538
raise
2539
2540
if debug:
2541
# Enable all possible GnuTLS debugging
2542
2543
# "Use a log level over 10 to enable all debugging options."
2544
# - GnuTLS manual
2545
gnutls.library.functions.gnutls_global_set_log_level(11)
2546
2547
@gnutls.library.types.gnutls_log_func
2548
def debug_gnutls(level, string):
2549
logger.debug("GnuTLS: %s", string[:-1])
2550
2551
gnutls.library.functions.gnutls_global_set_log_function(
2552
debug_gnutls)
2553
2554
# Redirect stdin so all checkers get /dev/null
2555
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2556
os.dup2(null, sys.stdin.fileno())
2557
if null > 2:
2558
os.close(null)
2559
2560
# Need to fork before connecting to D-Bus
2561
if not foreground:
2562
# Close all input and output, do double fork, etc.
2563
daemon()
2564
2565
# multiprocessing will use threads, so before we use gobject we
2566
# need to inform gobject that threads will be used.
2567
gobject.threads_init()
1011
except OSError, error:
1012
if error[0] != errno.EPERM:
1013
raise error
1014
1015
global service
1016
service = AvahiService(name = server_settings["servicename"],
1017
servicetype = "_mandos._tcp", )
1018
if server_settings["interface"]:
1019
service.interface = (if_nametoindex
1020
(server_settings["interface"]))
2568
1021
2569
1022
global main_loop
1023
global bus
1024
global server
2570
1025
# From the Avahi example code
2571
DBusGMainLoop(set_as_default=True)
1026
DBusGMainLoop(set_as_default=True )
2572
1027
main_loop = gobject.MainLoop()
2573
1028
bus = dbus.SystemBus()
1029
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1030
avahi.DBUS_PATH_SERVER),
1031
avahi.DBUS_INTERFACE_SERVER)
2574
1032
# End of Avahi example code
2575
1033
if use_dbus:
2576
try:
2577
bus_name = dbus.service.BusName("se.recompile.Mandos",
2578
bus,
2579
do_not_queue=True)
2580
old_bus_name = dbus.service.BusName(
2581
"se.bsnet.fukt.Mandos", bus,
2582
do_not_queue=True)
2583
except dbus.exceptions.DBusException as e:
2584
logger.error("Disabling D-Bus:", exc_info=e)
2585
use_dbus = False
2586
server_settings["use_dbus"] = False
2587
tcp_server.use_dbus = False
2588
if zeroconf:
2589
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2590
service = AvahiServiceToSyslog(
2591
name = server_settings["servicename"],
2592
servicetype = "_mandos._tcp",
2593
protocol = protocol,
2594
bus = bus)
2595
if server_settings["interface"]:
2596
service.interface = if_nametoindex(
2597
server_settings["interface"].encode("utf-8"))
2598
2599
global multiprocessing_manager
2600
multiprocessing_manager = multiprocessing.Manager()
2601
2602
client_class = Client
2603
if use_dbus:
2604
client_class = functools.partial(ClientDBus, bus = bus)
2605
2606
client_settings = Client.config_parser(client_config)
2607
old_client_settings = {}
2608
clients_data = {}
2609
2610
# This is used to redirect stdout and stderr for checker processes
2611
global wnull
2612
wnull = open(os.devnull, "w") # A writable /dev/null
2613
# Only used if server is running in foreground but not in debug
2614
# mode
2615
if debug or not foreground:
2616
wnull.close()
2617
2618
# Get client data and settings from last running state.
2619
if server_settings["restore"]:
2620
try:
2621
with open(stored_state_path, "rb") as stored_state:
2622
clients_data, old_client_settings = pickle.load(
2623
stored_state)
2624
os.remove(stored_state_path)
2625
except IOError as e:
2626
if e.errno == errno.ENOENT:
2627
logger.warning("Could not load persistent state:"
2628
" {}".format(os.strerror(e.errno)))
2629
else:
2630
logger.critical("Could not load persistent state:",
2631
exc_info=e)
2632
raise
2633
except EOFError as e:
2634
logger.warning("Could not load persistent state: "
2635
"EOFError:",
2636
exc_info=e)
2637
2638
with PGPEngine() as pgp:
2639
for client_name, client in clients_data.items():
2640
# Skip removed clients
2641
if client_name not in client_settings:
2642
continue
2643
2644
# Decide which value to use after restoring saved state.
2645
# We have three different values: Old config file,
2646
# new config file, and saved state.
2647
# New config value takes precedence if it differs from old
2648
# config value, otherwise use saved state.
2649
for name, value in client_settings[client_name].items():
2650
try:
2651
# For each value in new config, check if it
2652
# differs from the old config value (Except for
2653
# the "secret" attribute)
2654
if (name != "secret"
2655
and (value !=
2656
old_client_settings[client_name][name])):
2657
client[name] = value
2658
except KeyError:
2659
pass
2660
2661
# Clients who has passed its expire date can still be
2662
# enabled if its last checker was successful. A Client
2663
# whose checker succeeded before we stored its state is
2664
# assumed to have successfully run all checkers during
2665
# downtime.
2666
if client["enabled"]:
2667
if datetime.datetime.utcnow() >= client["expires"]:
2668
if not client["last_checked_ok"]:
2669
logger.warning(
2670
"disabling client {} - Client never "
2671
"performed a successful checker".format(
2672
client_name))
2673
client["enabled"] = False
2674
elif client["last_checker_status"] != 0:
2675
logger.warning(
2676
"disabling client {} - Client last"
2677
" checker failed with error code"
2678
" {}".format(
2679
client_name,
2680
client["last_checker_status"]))
2681
client["enabled"] = False
2682
else:
2683
client["expires"] = (
2684
datetime.datetime.utcnow()
2685
+ client["timeout"])
2686
logger.debug("Last checker succeeded,"
2687
" keeping {} enabled".format(
2688
client_name))
2689
try:
2690
client["secret"] = pgp.decrypt(
2691
client["encrypted_secret"],
2692
client_settings[client_name]["secret"])
2693
except PGPError:
2694
# If decryption fails, we use secret from new settings
2695
logger.debug("Failed to decrypt {} old secret".format(
2696
client_name))
2697
client["secret"] = (client_settings[client_name]
2698
["secret"])
2699
2700
# Add/remove clients based on new changes made to config
2701
for client_name in (set(old_client_settings)
2702
- set(client_settings)):
2703
del clients_data[client_name]
2704
for client_name in (set(client_settings)
2705
- set(old_client_settings)):
2706
clients_data[client_name] = client_settings[client_name]
2707
2708
# Create all client objects
2709
for client_name, client in clients_data.items():
2710
tcp_server.clients[client_name] = client_class(
2711
name = client_name,
2712
settings = client,
2713
server_settings = server_settings)
2714
2715
if not tcp_server.clients:
2716
logger.warning("No clients defined")
2717
2718
if not foreground:
2719
if pidfile is not None:
2720
pid = os.getpid()
2721
try:
2722
with pidfile:
2723
print(pid, file=pidfile)
2724
except IOError:
2725
logger.error("Could not write to file %r with PID %d",
2726
pidfilename, pid)
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1035
bus)
1036
1037
clients.update(Set(Client(name = section,
1038
config
1039
= dict(client_config.items(section)),
1040
use_dbus = use_dbus)
1041
for section in client_config.sections()))
1042
if not clients:
1043
logger.warning(u"No clients defined")
1044
1045
if debug:
1046
# Redirect stdin so all checkers get /dev/null
1047
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1048
os.dup2(null, sys.stdin.fileno())
1049
if null > 2:
1050
os.close(null)
1051
else:
1052
# No console logging
1053
logger.removeHandler(console)
1054
# Close all input and output, do double fork, etc.
1055
daemon()
1056
1057
try:
1058
pid = os.getpid()
1059
pidfile.write(str(pid) + "\n")
1060
pidfile.close()
2727
1061
del pidfile
2728
del pidfilename
2729
1062
except IOError:
1063
logger.error(u"Could not write to file %r with PID %d",
1064
pidfilename, pid)
1065
except NameError:
1066
# "pidfile" was never created
1067
pass
1068
del pidfilename
1069
1070
def cleanup():
1071
"Cleanup function; run on exit"
1072
global group
1073
# From the Avahi example code
1074
if not group is None:
1075
group.Free()
1076
group = None
1077
# End of Avahi example code
1078
1079
while clients:
1080
client = clients.pop()
1081
client.disable_hook = None
1082
client.disable()
1083
1084
atexit.register(cleanup)
1085
1086
if not debug:
1087
signal.signal(signal.SIGINT, signal.SIG_IGN)
2730
1088
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2731
1089
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2732
1090
2733
1091
if use_dbus:
2734
2735
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2737
class MandosDBusService(DBusObjectWithProperties):
1092
class MandosServer(dbus.service.Object):
2738
1093
"""A D-Bus proxy object"""
2739
2740
1094
def __init__(self):
2741
dbus.service.Object.__init__(self, bus, "/")
2742
2743
_interface = "se.recompile.Mandos"
2744
2745
@dbus_interface_annotations(_interface)
2746
def _foo(self):
2747
return {
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2749
"false" }
2750
1095
dbus.service.Object.__init__(self, bus,
1096
"/Mandos")
1097
_interface = u"org.mandos_system.Mandos"
1098
1099
@dbus.service.signal(_interface, signature="oa{sv}")
1100
def ClientAdded(self, objpath, properties):
1101
"D-Bus signal"
1102
pass
1103
2751
1104
@dbus.service.signal(_interface, signature="o")
2752
def ClientAdded(self, objpath):
2753
"D-Bus signal"
2754
pass
2755
2756
@dbus.service.signal(_interface, signature="ss")
2757
def ClientNotFound(self, fingerprint, address):
2758
"D-Bus signal"
2759
pass
2760
2761
@dbus.service.signal(_interface, signature="os")
2762
def ClientRemoved(self, objpath, name):
2763
"D-Bus signal"
2764
pass
2765
1105
def ClientRemoved(self, objpath):
1106
"D-Bus signal"
1107
pass
1108
2766
1109
@dbus.service.method(_interface, out_signature="ao")
2767
1110
def GetAllClients(self):
2768
"D-Bus method"
2769
return dbus.Array(c.dbus_object_path for c in
2770
tcp_server.clients.itervalues())
2771
2772
@dbus.service.method(_interface,
2773
out_signature="a{oa{sv}}")
1111
return dbus.Array(c.dbus_object_path for c in clients)
1112
1113
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2774
1114
def GetAllClientsWithProperties(self):
2775
"D-Bus method"
2776
1115
return dbus.Dictionary(
2777
{ c.dbus_object_path: c.GetAll("")
2778
for c in tcp_server.clients.itervalues() },
1116
((c.dbus_object_path, c.GetAllProperties())
1117
for c in clients),
2779
1118
signature="oa{sv}")
2780
1119
2781
1120
@dbus.service.method(_interface, in_signature="o")
2782
1121
def RemoveClient(self, object_path):
2783
"D-Bus method"
2784
for c in tcp_server.clients.itervalues():
1122
for c in clients:
2785
1123
if c.dbus_object_path == object_path:
2786
del tcp_server.clients[c.name]
2787
c.remove_from_connection()
1124
clients.remove(c)
2788
1125
# Don't signal anything except ClientRemoved
2789
c.disable(quiet=True)
1126
c.use_dbus = False
1127
c.disable()
2790
1128
# Emit D-Bus signal
2791
self.ClientRemoved(object_path, c.name)
1129
self.ClientRemoved(object_path)
2792
1130
return
2793
raise KeyError(object_path)
2794
1131
raise KeyError
1132
@dbus.service.method(_interface)
1133
def Quit(self):
1134
main_loop.quit()
1135
2795
1136
del _interface
2796
2797
mandos_dbus_service = MandosDBusService()
2798
2799
def cleanup():
2800
"Cleanup function; run on exit"
2801
if zeroconf:
2802
service.cleanup()
2803
2804
multiprocessing.active_children()
2805
wnull.close()
2806
if not (tcp_server.clients or client_settings):
2807
return
2808
2809
# Store client before exiting. Secrets are encrypted with key
2810
# based on what config file has. If config file is
2811
# removed/edited, old secret will thus be unrecovable.
2812
clients = {}
2813
with PGPEngine() as pgp:
2814
for client in tcp_server.clients.itervalues():
2815
key = client_settings[client.name]["secret"]
2816
client.encrypted_secret = pgp.encrypt(client.secret,
2817
key)
2818
client_dict = {}
2819
2820
# A list of attributes that can not be pickled
2821
# + secret.
2822
exclude = { "bus", "changedstate", "secret",
2823
"checker", "server_settings" }
2824
for name, typ in inspect.getmembers(dbus.service
2825
.Object):
2826
exclude.add(name)
2827
2828
client_dict["encrypted_secret"] = (client
2829
.encrypted_secret)
2830
for attr in client.client_structure:
2831
if attr not in exclude:
2832
client_dict[attr] = getattr(client, attr)
2833
2834
clients[client.name] = client_dict
2835
del client_settings[client.name]["secret"]
2836
2837
try:
2838
with tempfile.NamedTemporaryFile(
2839
mode='wb',
2840
suffix=".pickle",
2841
prefix='clients-',
2842
dir=os.path.dirname(stored_state_path),
2843
delete=False) as stored_state:
2844
pickle.dump((clients, client_settings), stored_state)
2845
tempname = stored_state.name
2846
os.rename(tempname, stored_state_path)
2847
except (IOError, OSError) as e:
2848
if not debug:
2849
try:
2850
os.remove(tempname)
2851
except NameError:
2852
pass
2853
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2854
logger.warning("Could not save persistent state: {}"
2855
.format(os.strerror(e.errno)))
2856
else:
2857
logger.warning("Could not save persistent state:",
2858
exc_info=e)
2859
raise
2860
2861
# Delete all clients, and settings from config
2862
while tcp_server.clients:
2863
name, client = tcp_server.clients.popitem()
2864
if use_dbus:
2865
client.remove_from_connection()
2866
# Don't signal anything except ClientRemoved
2867
client.disable(quiet=True)
2868
if use_dbus:
2869
# Emit D-Bus signal
2870
mandos_dbus_service.ClientRemoved(
2871
client.dbus_object_path, client.name)
2872
client_settings.clear()
2873
2874
atexit.register(cleanup)
2875
2876
for client in tcp_server.clients.itervalues():
1137
1138
mandos_server = MandosServer()
1139
1140
for client in clients:
2877
1141
if use_dbus:
2878
1142
# Emit D-Bus signal
2879
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2880
# Need to initiate checking of clients
2881
if client.enabled:
2882
client.init_checker()
1143
mandos_server.ClientAdded(client.dbus_object_path,
1144
client.GetAllProperties())
1145
client.enable()
2883
1146
2884
1147
tcp_server.enable()
2885
1148
tcp_server.server_activate()
2886
1149
2887
1150
# Find out what port we got
2888
if zeroconf:
2889
service.port = tcp_server.socket.getsockname()[1]
2890
if use_ipv6:
2891
logger.info("Now listening on address %r, port %d,"
2892
" flowinfo %d, scope_id %d",
2893
*tcp_server.socket.getsockname())
2894
else: # IPv4
2895
logger.info("Now listening on address %r, port %d",
2896
*tcp_server.socket.getsockname())
1151
service.port = tcp_server.socket.getsockname()[1]
1152
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1153
u" scope_id %d" % tcp_server.socket.getsockname())
2897
1154
2898
1155
#service.interface = tcp_server.socket.getsockname()[3]
2899
1156
2900
1157
try:
2901
if zeroconf:
2902
# From the Avahi example code
2903
try:
2904
service.activate()
2905
except dbus.exceptions.DBusException as error:
2906
logger.critical("D-Bus Exception", exc_info=error)
2907
cleanup()
2908
sys.exit(1)
2909
# End of Avahi example code
1158
# From the Avahi example code
1159
server.connect_to_signal("StateChanged", server_state_changed)
1160
try:
1161
server_state_changed(server.GetState())
1162
except dbus.exceptions.DBusException, error:
1163
logger.critical(u"DBusException: %s", error)
1164
sys.exit(1)
1165
# End of Avahi example code
2910
1166
2911
1167
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2912
1168
lambda *args, **kwargs:
2913
1169
(tcp_server.handle_request
2914
1170
(*args[2:], **kwargs) or True))
2915
1171
2916
logger.debug("Starting main loop")
1172
logger.debug(u"Starting main loop")
2917
1173
main_loop.run()
2918
except AvahiError as error:
2919
logger.critical("Avahi Error", exc_info=error)
2920
cleanup()
1174
except AvahiError, error:
1175
logger.critical(u"AvahiError: %s", error)
2921
1176
sys.exit(1)
2922
1177
except KeyboardInterrupt:
2923
1178
if debug:
2924
print("", file=sys.stderr)
2925
logger.debug("Server received KeyboardInterrupt")
2926
logger.debug("Server exiting")
2927
# Must run before the D-Bus bus name gets deregistered
2928
cleanup()
2929
1179
print
2930
1180
2931
1181
if __name__ == '__main__':
2932
1182
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0