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- Committer: Teddy Hogeborn
- Date: 2009-02-07 04:50:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20090207045039-xkr6b80vtqwqrq8l
* Makefile (install-client-nokey): Move "initramfs-tools-script" from
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
- 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 = "1.0.5"
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 [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
236
84
237
85
class AvahiError(Exception):
238
86
def __init__(self, value, *args, **kwargs):
239
87
self.value = value
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
243
91
244
92
class AvahiServiceError(AvahiError):
245
93
pass
246
94
247
248
95
class AvahiGroupError(AvahiError):
249
96
pass
250
97
251
98
252
99
class AvahiService(object):
253
100
"""An Avahi (Zeroconf) service.
254
255
101
Attributes:
256
102
interface: integer; avahi.IF_UNSPEC or an interface index.
257
103
Used to optionally bind to the specified interface.
258
104
name: string; Example: 'Mandos'
259
105
type: string; Example: '_mandos._tcp'.
260
See <https://www.iana.org/assignments/service-names-port-numbers>
106
See <http://www.dns-sd.org/ServiceTypes.html>
261
107
port: integer; what port to announce
262
108
TXT: list of strings; TXT record for the service
263
109
domain: string; Domain to publish on, default to .local if empty.
265
111
max_renames: integer; maximum number of renames
266
112
rename_count: integer; counter so we only rename after collisions
267
113
a sensible number of times
268
group: D-Bus Entry Group
269
server: D-Bus Server
270
bus: dbus.SystemBus()
271
114
"""
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):
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768):
284
118
self.interface = interface
285
119
self.name = name
286
120
self.type = servicetype
290
124
self.host = host
291
125
self.rename_count = 0
292
126
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):
127
def rename(self):
300
128
"""Derived from the Avahi example code"""
301
129
if self.rename_count >= self.max_renames:
302
logger.critical("No suitable Zeroconf service name found"
303
" after %i retries, exiting.",
130
logger.critical(u"No suitable Zeroconf service name found"
131
u" after %i retries, exiting.",
304
132
self.rename_count)
305
raise AvahiServiceError("Too many renames")
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
133
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
135
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
137
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
140
self.remove()
141
self.add()
308
142
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
143
def remove(self):
326
144
"""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
145
if group is not None:
146
group.Reset()
333
147
def add(self):
334
148
"""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):
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
152
(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
entry_group_state_changed)
157
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
171
# End of Avahi example code
172
173
174
def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
179
class Client(dbus.service.Object):
449
180
"""A representation of a client host served by this server.
450
451
181
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
182
name: string; from the config file, used in log messages and
183
D-Bus identifiers
184
fingerprint: string (40 or 32 hexadecimal digits); used to
185
uniquely identify the client
186
secret: bytestring; sent verbatim (over TLS) to client
187
host: string; available for use by the checker command
188
created: datetime.datetime(); (UTC) object creation
189
last_enabled: datetime.datetime(); (UTC)
190
enabled: bool()
191
last_checked_ok: datetime.datetime(); (UTC) or None
192
timeout: datetime.timedelta(); How long from last_checked_ok
193
until this client is invalid
194
interval: datetime.timedelta(); How often to start a new checker
195
disable_hook: If set, called by disable() as disable_hook(self)
455
196
checker: subprocess.Popen(); a running checker process used
456
197
to see if the client lives.
457
198
'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
199
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
201
checker_callback_tag: - '' -
202
checker_command: string; External command which is run to check if
203
client lives. %() expansions are done at
461
204
runtime with vars(self) as dict, so that for
462
205
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()
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
492
208
"""
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):
209
def timeout_milliseconds(self):
210
"Return the 'timeout' attribute in milliseconds"
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
214
215
def interval_milliseconds(self):
216
"Return the 'interval' attribute in milliseconds"
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
220
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
223
"""Note: the 'checker' key in 'config' sets the
224
'checker_command' attribute and *not* the 'checker'
225
attribute."""
562
226
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)
227
if config is None:
228
config = {}
229
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
231
# Uppercase and remove spaces from fingerprint for later
232
# comparison purposes with return value from the fingerprint()
233
# function
234
self.fingerprint = (config["fingerprint"].upper()
235
.replace(u" ", u""))
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
243
self.secret = secfile.read()
576
244
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
245
raise TypeError(u"No secret or secfile for client %s"
246
% self.name)
247
self.host = config.get("host", "")
248
self.created = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
586
255
self.checker = None
587
256
self.checker_initiator_tag = None
588
257
self.disable_initiator_tag = None
589
258
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()
259
self.checker_command = config["checker"]
260
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
609
270
610
271
def enable(self):
611
272
"""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
273
self.last_enabled = datetime.datetime.utcnow()
618
self.init_checker()
619
self.send_changedstate()
274
# Schedule a new checker to be started an 'interval' from now,
275
# and every interval from then on.
276
self.checker_initiator_tag = (gobject.timeout_add
277
(self.interval_milliseconds(),
278
self.start_checker))
279
# Also start a new checker *right now*.
280
self.start_checker()
281
# Schedule a disable() when 'timeout' has passed
282
self.disable_initiator_tag = (gobject.timeout_add
283
(self.timeout_milliseconds(),
284
self.disable))
285
self.enabled = True
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
620
293
621
def disable(self, quiet=True):
294
def disable(self):
622
295
"""Disable this client."""
623
296
if not getattr(self, "enabled", False):
624
297
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:
298
logger.info(u"Disabling client %s", self.name)
299
if getattr(self, "disable_initiator_tag", False):
628
300
gobject.source_remove(self.disable_initiator_tag)
629
301
self.disable_initiator_tag = None
630
self.expires = None
631
if getattr(self, "checker_initiator_tag", None) is not None:
302
if getattr(self, "checker_initiator_tag", False):
632
303
gobject.source_remove(self.checker_initiator_tag)
633
304
self.checker_initiator_tag = None
634
305
self.stop_checker()
306
if self.disable_hook:
307
self.disable_hook(self)
635
308
self.enabled = False
636
if not quiet:
637
self.send_changedstate()
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
638
313
# Do not run this again if called by a gobject.timeout_add
639
314
return False
640
315
641
316
def __del__(self):
317
self.disable_hook = None
642
318
self.disable()
643
319
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):
320
def checker_callback(self, pid, condition, command):
662
321
"""The checker has completed, so take appropriate actions."""
663
322
self.checker_callback_tag = None
664
323
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",
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
328
if os.WIFEXITED(condition):
329
exitstatus = os.WEXITSTATUS(condition)
330
if exitstatus == 0:
331
logger.info(u"Checker for %(name)s succeeded",
674
332
vars(self))
675
333
self.checked_ok()
676
334
else:
677
logger.info("Checker for %(name)s failed", vars(self))
335
logger.info(u"Checker for %(name)s failed",
336
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
678
342
else:
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
681
logger.warning("Checker for %(name)s crashed?",
343
logger.warning(u"Checker for %(name)s crashed?",
682
344
vars(self))
683
return False
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
684
350
685
351
def checked_ok(self):
686
"""Assert that the client has been seen, alive and well."""
352
"""Bump up the timeout for this client.
353
This should only be called when the client has been seen,
354
alive and well.
355
"""
687
356
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()
357
gobject.source_remove(self.disable_initiator_tag)
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
706
367
707
368
def start_checker(self):
708
369
"""Start a new checker subprocess if one is not running.
709
710
370
If a checker already exists, leave it running and do
711
371
nothing."""
712
372
# 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
373
# did that, then if a checker (for some reason) started
374
# running slowly and taking more than 'interval' time, the
375
# client would inevitably timeout, since no checker would get
376
# a chance to run to completion. If we instead leave running
717
377
# 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
378
# than 'timeout' for the client to be declared invalid, which
379
# is as it should be.
726
380
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)
381
try:
382
# In case checker_command has exactly one % operator
383
command = self.checker_command % self.host
384
except TypeError:
385
# Escape attributes for the shell
386
escaped_attrs = dict((key, re.escape(str(val)))
387
for key, val in
388
vars(self).iteritems())
389
try:
390
command = self.checker_command % escaped_attrs
391
except TypeError, error:
392
logger.error(u'Could not format string "%s":'
393
u' %s', self.checker_command, error)
394
return True # Try again later
395
try:
396
logger.info(u"Starting checker %r for %s",
397
command, self.name)
398
# We don't need to redirect stdout and stderr, since
399
# in normal mode, that is already done by daemon(),
400
# and in debug mode we don't want to. (Stdin is
401
# always replaced by /dev/null.)
402
self.checker = subprocess.Popen(command,
403
close_fds=True,
404
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
411
self.checker_callback_tag = (gobject.child_watch_add
412
(self.checker.pid,
413
self.checker_callback,
414
data=command))
415
except OSError, error:
416
logger.error(u"Failed to start subprocess: %s",
417
error)
764
418
# Re-run this periodically if run by gobject.timeout_add
765
419
return True
766
420
771
425
self.checker_callback_tag = None
772
426
if getattr(self, "checker", None) is None:
773
427
return
774
logger.debug("Stopping checker for %(name)s", vars(self))
775
self.checker.terminate()
428
logger.debug(u"Stopping checker for %(name)s", vars(self))
429
try:
430
os.kill(self.checker.pid, signal.SIGTERM)
431
#os.sleep(0.5)
432
#if self.checker.poll() is None:
433
# os.kill(self.checker.pid, signal.SIGKILL)
434
except OSError, error:
435
if error.errno != errno.ESRCH: # No such process
436
raise
776
437
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
See also the DBusObjectWithAnnotations class.
847
"""
848
849
def decorator(func):
850
func._dbus_annotations = annotations
851
return func
852
853
return decorator
854
855
856
class DBusPropertyException(dbus.exceptions.DBusException):
857
"""A base class for D-Bus property-related exceptions
858
"""
859
pass
860
861
862
class DBusPropertyAccessException(DBusPropertyException):
863
"""A property's access permissions disallows an operation.
864
"""
865
pass
866
867
868
class DBusPropertyNotFound(DBusPropertyException):
869
"""An attempt was made to access a non-existing property.
870
"""
871
pass
872
873
874
class DBusObjectWithAnnotations(dbus.service.Object):
875
"""A D-Bus object with annotations.
876
877
Classes inheriting from this can use the dbus_annotations
878
decorator to add annotations to methods or signals.
879
"""
880
881
@staticmethod
882
def _is_dbus_thing(thing):
883
"""Returns a function testing if an attribute is a D-Bus thing
884
885
If called like _is_dbus_thing("method") it returns a function
886
suitable for use as predicate to inspect.getmembers().
887
"""
888
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
889
False)
890
891
def _get_all_dbus_things(self, thing):
892
"""Returns a generator of (name, attribute) pairs
893
"""
894
return ((getattr(athing.__get__(self), "_dbus_name", name),
895
athing.__get__(self))
896
for cls in self.__class__.__mro__
897
for name, athing in
898
inspect.getmembers(cls, self._is_dbus_thing(thing)))
899
900
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
901
out_signature = "s",
902
path_keyword = 'object_path',
903
connection_keyword = 'connection')
904
def Introspect(self, object_path, connection):
905
"""Overloading of standard D-Bus method.
906
907
Inserts annotation tags on methods and signals.
908
"""
909
xmlstring = dbus.service.Object.Introspect(self, object_path,
910
connection)
911
try:
912
document = xml.dom.minidom.parseString(xmlstring)
913
914
for if_tag in document.getElementsByTagName("interface"):
915
# Add annotation tags
916
for typ in ("method", "signal"):
917
for tag in if_tag.getElementsByTagName(typ):
918
annots = dict()
919
for name, prop in (self.
920
_get_all_dbus_things(typ)):
921
if (name == tag.getAttribute("name")
922
and prop._dbus_interface
923
== if_tag.getAttribute("name")):
924
annots.update(getattr(
925
prop, "_dbus_annotations", {}))
926
for name, value in annots.items():
927
ann_tag = document.createElement(
928
"annotation")
929
ann_tag.setAttribute("name", name)
930
ann_tag.setAttribute("value", value)
931
tag.appendChild(ann_tag)
932
# Add interface annotation tags
933
for annotation, value in dict(
934
itertools.chain.from_iterable(
935
annotations().items()
936
for name, annotations
937
in self._get_all_dbus_things("interface")
938
if name == if_tag.getAttribute("name")
939
)).items():
940
ann_tag = document.createElement("annotation")
941
ann_tag.setAttribute("name", annotation)
942
ann_tag.setAttribute("value", value)
943
if_tag.appendChild(ann_tag)
944
# Fix argument name for the Introspect method itself
945
if (if_tag.getAttribute("name")
946
== dbus.INTROSPECTABLE_IFACE):
947
for cn in if_tag.getElementsByTagName("method"):
948
if cn.getAttribute("name") == "Introspect":
949
for arg in cn.getElementsByTagName("arg"):
950
if (arg.getAttribute("direction")
951
== "out"):
952
arg.setAttribute("name",
953
"xml_data")
954
xmlstring = document.toxml("utf-8")
955
document.unlink()
956
except (AttributeError, xml.dom.DOMException,
957
xml.parsers.expat.ExpatError) as error:
958
logger.error("Failed to override Introspection method",
959
exc_info=error)
960
return xmlstring
961
962
963
class DBusObjectWithProperties(DBusObjectWithAnnotations):
964
"""A D-Bus object with properties.
965
966
Classes inheriting from this can use the dbus_service_property
967
decorator to expose methods as D-Bus properties. It exposes the
968
standard Get(), Set(), and GetAll() methods on the D-Bus.
969
"""
970
971
def _get_dbus_property(self, interface_name, property_name):
972
"""Returns a bound method if one exists which is a D-Bus
973
property with the specified name and interface.
974
"""
975
for cls in self.__class__.__mro__:
976
for name, value in inspect.getmembers(
977
cls, self._is_dbus_thing("property")):
978
if (value._dbus_name == property_name
979
and value._dbus_interface == interface_name):
980
return value.__get__(self)
981
982
# No such property
983
raise DBusPropertyNotFound("{}:{}.{}".format(
984
self.dbus_object_path, interface_name, property_name))
985
986
@classmethod
987
def _get_all_interface_names(cls):
988
"""Get a sequence of all interfaces supported by an object"""
989
return (name for name in set(getattr(getattr(x, attr),
990
"_dbus_interface", None)
991
for x in (inspect.getmro(cls))
992
for attr in dir(x))
993
if name is not None)
994
995
@dbus.service.method(dbus.PROPERTIES_IFACE,
996
in_signature="ss",
997
out_signature="v")
998
def Get(self, interface_name, property_name):
999
"""Standard D-Bus property Get() method, see D-Bus standard.
1000
"""
1001
prop = self._get_dbus_property(interface_name, property_name)
1002
if prop._dbus_access == "write":
1003
raise DBusPropertyAccessException(property_name)
1004
value = prop()
1005
if not hasattr(value, "variant_level"):
1006
return value
1007
return type(value)(value, variant_level=value.variant_level+1)
1008
1009
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1010
def Set(self, interface_name, property_name, value):
1011
"""Standard D-Bus property Set() method, see D-Bus standard.
1012
"""
1013
prop = self._get_dbus_property(interface_name, property_name)
1014
if prop._dbus_access == "read":
1015
raise DBusPropertyAccessException(property_name)
1016
if prop._dbus_get_args_options["byte_arrays"]:
1017
# The byte_arrays option is not supported yet on
1018
# signatures other than "ay".
1019
if prop._dbus_signature != "ay":
1020
raise ValueError("Byte arrays not supported for non-"
1021
"'ay' signature {!r}"
1022
.format(prop._dbus_signature))
1023
value = dbus.ByteArray(b''.join(chr(byte)
1024
for byte in value))
1025
prop(value)
1026
1027
@dbus.service.method(dbus.PROPERTIES_IFACE,
1028
in_signature="s",
1029
out_signature="a{sv}")
1030
def GetAll(self, interface_name):
1031
"""Standard D-Bus property GetAll() method, see D-Bus
1032
standard.
1033
1034
Note: Will not include properties with access="write".
1035
"""
1036
properties = {}
1037
for name, prop in self._get_all_dbus_things("property"):
1038
if (interface_name
1039
and interface_name != prop._dbus_interface):
1040
# Interface non-empty but did not match
1041
continue
1042
# Ignore write-only properties
1043
if prop._dbus_access == "write":
1044
continue
1045
value = prop()
1046
if not hasattr(value, "variant_level"):
1047
properties[name] = value
1048
continue
1049
properties[name] = type(value)(
1050
value, variant_level = value.variant_level + 1)
1051
return dbus.Dictionary(properties, signature="sv")
1052
1053
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1054
def PropertiesChanged(self, interface_name, changed_properties,
1055
invalidated_properties):
1056
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1057
standard.
1058
"""
1059
pass
1060
1061
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1062
out_signature="s",
1063
path_keyword='object_path',
1064
connection_keyword='connection')
1065
def Introspect(self, object_path, connection):
1066
"""Overloading of standard D-Bus method.
1067
1068
Inserts property tags and interface annotation tags.
1069
"""
1070
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1071
object_path,
1072
connection)
1073
try:
1074
document = xml.dom.minidom.parseString(xmlstring)
1075
1076
def make_tag(document, name, prop):
1077
e = document.createElement("property")
1078
e.setAttribute("name", name)
1079
e.setAttribute("type", prop._dbus_signature)
1080
e.setAttribute("access", prop._dbus_access)
1081
return e
1082
1083
for if_tag in document.getElementsByTagName("interface"):
1084
# Add property tags
1085
for tag in (make_tag(document, name, prop)
1086
for name, prop
1087
in self._get_all_dbus_things("property")
1088
if prop._dbus_interface
1089
== if_tag.getAttribute("name")):
1090
if_tag.appendChild(tag)
1091
# Add annotation tags for properties
1092
for tag in if_tag.getElementsByTagName("property"):
1093
annots = dict()
1094
for name, prop in self._get_all_dbus_things(
1095
"property"):
1096
if (name == tag.getAttribute("name")
1097
and prop._dbus_interface
1098
== if_tag.getAttribute("name")):
1099
annots.update(getattr(
1100
prop, "_dbus_annotations", {}))
1101
for name, value in annots.items():
1102
ann_tag = document.createElement(
1103
"annotation")
1104
ann_tag.setAttribute("name", name)
1105
ann_tag.setAttribute("value", value)
1106
tag.appendChild(ann_tag)
1107
# Add the names to the return values for the
1108
# "org.freedesktop.DBus.Properties" methods
1109
if (if_tag.getAttribute("name")
1110
== "org.freedesktop.DBus.Properties"):
1111
for cn in if_tag.getElementsByTagName("method"):
1112
if cn.getAttribute("name") == "Get":
1113
for arg in cn.getElementsByTagName("arg"):
1114
if (arg.getAttribute("direction")
1115
== "out"):
1116
arg.setAttribute("name", "value")
1117
elif cn.getAttribute("name") == "GetAll":
1118
for arg in cn.getElementsByTagName("arg"):
1119
if (arg.getAttribute("direction")
1120
== "out"):
1121
arg.setAttribute("name", "props")
1122
xmlstring = document.toxml("utf-8")
1123
document.unlink()
1124
except (AttributeError, xml.dom.DOMException,
1125
xml.parsers.expat.ExpatError) as error:
1126
logger.error("Failed to override Introspection method",
1127
exc_info=error)
1128
return xmlstring
1129
1130
try:
1131
dbus.OBJECT_MANAGER_IFACE
1132
except AttributeError:
1133
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1134
1135
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1136
"""A D-Bus object with an ObjectManager.
1137
1138
Classes inheriting from this exposes the standard
1139
GetManagedObjects call and the InterfacesAdded and
1140
InterfacesRemoved signals on the standard
1141
"org.freedesktop.DBus.ObjectManager" interface.
1142
1143
Note: No signals are sent automatically; they must be sent
1144
manually.
1145
"""
1146
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1147
out_signature = "a{oa{sa{sv}}}")
1148
def GetManagedObjects(self):
1149
"""This function must be overridden"""
1150
raise NotImplementedError()
1151
1152
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1153
signature = "oa{sa{sv}}")
1154
def InterfacesAdded(self, object_path, interfaces_and_properties):
1155
pass
1156
1157
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1158
def InterfacesRemoved(self, object_path, interfaces):
1159
pass
1160
1161
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1162
out_signature = "s",
1163
path_keyword = 'object_path',
1164
connection_keyword = 'connection')
1165
def Introspect(self, object_path, connection):
1166
"""Overloading of standard D-Bus method.
1167
1168
Override return argument name of GetManagedObjects to be
1169
"objpath_interfaces_and_properties"
1170
"""
1171
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1172
object_path,
1173
connection)
1174
try:
1175
document = xml.dom.minidom.parseString(xmlstring)
1176
1177
for if_tag in document.getElementsByTagName("interface"):
1178
# Fix argument name for the GetManagedObjects method
1179
if (if_tag.getAttribute("name")
1180
== dbus.OBJECT_MANAGER_IFACE):
1181
for cn in if_tag.getElementsByTagName("method"):
1182
if (cn.getAttribute("name")
1183
== "GetManagedObjects"):
1184
for arg in cn.getElementsByTagName("arg"):
1185
if (arg.getAttribute("direction")
1186
== "out"):
1187
arg.setAttribute(
1188
"name",
1189
"objpath_interfaces"
1190
"_and_properties")
1191
xmlstring = document.toxml("utf-8")
1192
document.unlink()
1193
except (AttributeError, xml.dom.DOMException,
1194
xml.parsers.expat.ExpatError) as error:
1195
logger.error("Failed to override Introspection method",
1196
exc_info = error)
1197
return xmlstring
1198
1199
def datetime_to_dbus(dt, variant_level=0):
1200
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1201
if dt is None:
1202
return dbus.String("", variant_level = variant_level)
1203
return dbus.String(dt.isoformat(), variant_level=variant_level)
1204
1205
1206
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1207
"""A class decorator; applied to a subclass of
1208
dbus.service.Object, it will add alternate D-Bus attributes with
1209
interface names according to the "alt_interface_names" mapping.
1210
Usage:
1211
1212
@alternate_dbus_interfaces({"org.example.Interface":
1213
"net.example.AlternateInterface"})
1214
class SampleDBusObject(dbus.service.Object):
1215
@dbus.service.method("org.example.Interface")
1216
def SampleDBusMethod():
1217
pass
1218
1219
The above "SampleDBusMethod" on "SampleDBusObject" will be
1220
reachable via two interfaces: "org.example.Interface" and
1221
"net.example.AlternateInterface", the latter of which will have
1222
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1223
"true", unless "deprecate" is passed with a False value.
1224
1225
This works for methods and signals, and also for D-Bus properties
1226
(from DBusObjectWithProperties) and interfaces (from the
1227
dbus_interface_annotations decorator).
1228
"""
1229
1230
def wrapper(cls):
1231
for orig_interface_name, alt_interface_name in (
1232
alt_interface_names.items()):
1233
attr = {}
1234
interface_names = set()
1235
# Go though all attributes of the class
1236
for attrname, attribute in inspect.getmembers(cls):
1237
# Ignore non-D-Bus attributes, and D-Bus attributes
1238
# with the wrong interface name
1239
if (not hasattr(attribute, "_dbus_interface")
1240
or not attribute._dbus_interface.startswith(
1241
orig_interface_name)):
1242
continue
1243
# Create an alternate D-Bus interface name based on
1244
# the current name
1245
alt_interface = attribute._dbus_interface.replace(
1246
orig_interface_name, alt_interface_name)
1247
interface_names.add(alt_interface)
1248
# Is this a D-Bus signal?
1249
if getattr(attribute, "_dbus_is_signal", False):
1250
if sys.version_info.major == 2:
1251
# Extract the original non-method undecorated
1252
# function by black magic
1253
nonmethod_func = (dict(
1254
zip(attribute.func_code.co_freevars,
1255
attribute.__closure__))
1256
["func"].cell_contents)
1257
else:
1258
nonmethod_func = attribute
1259
# Create a new, but exactly alike, function
1260
# object, and decorate it to be a new D-Bus signal
1261
# with the alternate D-Bus interface name
1262
if sys.version_info.major == 2:
1263
new_function = types.FunctionType(
1264
nonmethod_func.func_code,
1265
nonmethod_func.func_globals,
1266
nonmethod_func.func_name,
1267
nonmethod_func.func_defaults,
1268
nonmethod_func.func_closure)
1269
else:
1270
new_function = types.FunctionType(
1271
nonmethod_func.__code__,
1272
nonmethod_func.__globals__,
1273
nonmethod_func.__name__,
1274
nonmethod_func.__defaults__,
1275
nonmethod_func.__closure__)
1276
new_function = (dbus.service.signal(
1277
alt_interface,
1278
attribute._dbus_signature)(new_function))
1279
# Copy annotations, if any
1280
try:
1281
new_function._dbus_annotations = dict(
1282
attribute._dbus_annotations)
1283
except AttributeError:
1284
pass
1285
# Define a creator of a function to call both the
1286
# original and alternate functions, so both the
1287
# original and alternate signals gets sent when
1288
# the function is called
1289
def fixscope(func1, func2):
1290
"""This function is a scope container to pass
1291
func1 and func2 to the "call_both" function
1292
outside of its arguments"""
1293
1294
@functools.wraps(func2)
1295
def call_both(*args, **kwargs):
1296
"""This function will emit two D-Bus
1297
signals by calling func1 and func2"""
1298
func1(*args, **kwargs)
1299
func2(*args, **kwargs)
1300
# Make wrapper function look like a D-Bus signal
1301
for name, attr in inspect.getmembers(func2):
1302
if name.startswith("_dbus_"):
1303
setattr(call_both, name, attr)
1304
1305
return call_both
1306
# Create the "call_both" function and add it to
1307
# the class
1308
attr[attrname] = fixscope(attribute, new_function)
1309
# Is this a D-Bus method?
1310
elif getattr(attribute, "_dbus_is_method", False):
1311
# Create a new, but exactly alike, function
1312
# object. Decorate it to be a new D-Bus method
1313
# with the alternate D-Bus interface name. Add it
1314
# to the class.
1315
attr[attrname] = (
1316
dbus.service.method(
1317
alt_interface,
1318
attribute._dbus_in_signature,
1319
attribute._dbus_out_signature)
1320
(types.FunctionType(attribute.func_code,
1321
attribute.func_globals,
1322
attribute.func_name,
1323
attribute.func_defaults,
1324
attribute.func_closure)))
1325
# Copy annotations, if any
1326
try:
1327
attr[attrname]._dbus_annotations = dict(
1328
attribute._dbus_annotations)
1329
except AttributeError:
1330
pass
1331
# Is this a D-Bus property?
1332
elif getattr(attribute, "_dbus_is_property", False):
1333
# Create a new, but exactly alike, function
1334
# object, and decorate it to be a new D-Bus
1335
# property with the alternate D-Bus interface
1336
# name. Add it to the class.
1337
attr[attrname] = (dbus_service_property(
1338
alt_interface, attribute._dbus_signature,
1339
attribute._dbus_access,
1340
attribute._dbus_get_args_options
1341
["byte_arrays"])
1342
(types.FunctionType(
1343
attribute.func_code,
1344
attribute.func_globals,
1345
attribute.func_name,
1346
attribute.func_defaults,
1347
attribute.func_closure)))
1348
# Copy annotations, if any
1349
try:
1350
attr[attrname]._dbus_annotations = dict(
1351
attribute._dbus_annotations)
1352
except AttributeError:
1353
pass
1354
# Is this a D-Bus interface?
1355
elif getattr(attribute, "_dbus_is_interface", False):
1356
# Create a new, but exactly alike, function
1357
# object. Decorate it to be a new D-Bus interface
1358
# with the alternate D-Bus interface name. Add it
1359
# to the class.
1360
attr[attrname] = (
1361
dbus_interface_annotations(alt_interface)
1362
(types.FunctionType(attribute.func_code,
1363
attribute.func_globals,
1364
attribute.func_name,
1365
attribute.func_defaults,
1366
attribute.func_closure)))
1367
if deprecate:
1368
# Deprecate all alternate interfaces
1369
iname="_AlternateDBusNames_interface_annotation{}"
1370
for interface_name in interface_names:
1371
1372
@dbus_interface_annotations(interface_name)
1373
def func(self):
1374
return { "org.freedesktop.DBus.Deprecated":
1375
"true" }
1376
# Find an unused name
1377
for aname in (iname.format(i)
1378
for i in itertools.count()):
1379
if aname not in attr:
1380
attr[aname] = func
1381
break
1382
if interface_names:
1383
# Replace the class with a new subclass of it with
1384
# methods, signals, etc. as created above.
1385
cls = type(b"{}Alternate".format(cls.__name__),
1386
(cls, ), attr)
1387
return cls
1388
1389
return wrapper
1390
1391
1392
@alternate_dbus_interfaces({"se.recompile.Mandos":
1393
"se.bsnet.fukt.Mandos"})
1394
class ClientDBus(Client, DBusObjectWithProperties):
1395
"""A Client class using D-Bus
1396
1397
Attributes:
1398
dbus_object_path: dbus.ObjectPath
1399
bus: dbus.SystemBus()
1400
"""
1401
1402
runtime_expansions = (Client.runtime_expansions
1403
+ ("dbus_object_path", ))
1404
1405
_interface = "se.recompile.Mandos.Client"
1406
1407
# dbus.service.Object doesn't use super(), so we can't either.
1408
1409
def __init__(self, bus = None, *args, **kwargs):
1410
self.bus = bus
1411
Client.__init__(self, *args, **kwargs)
1412
# Only now, when this client is initialized, can it show up on
1413
# the D-Bus
1414
client_object_name = str(self.name).translate(
1415
{ord("."): ord("_"),
1416
ord("-"): ord("_")})
1417
self.dbus_object_path = dbus.ObjectPath(
1418
"/clients/" + client_object_name)
1419
DBusObjectWithProperties.__init__(self, self.bus,
1420
self.dbus_object_path)
1421
1422
def notifychangeproperty(transform_func, dbus_name,
1423
type_func=lambda x: x,
1424
variant_level=1,
1425
invalidate_only=False,
1426
_interface=_interface):
1427
""" Modify a variable so that it's a property which announces
1428
its changes to DBus.
1429
1430
transform_fun: Function that takes a value and a variant_level
1431
and transforms it to a D-Bus type.
1432
dbus_name: D-Bus name of the variable
1433
type_func: Function that transform the value before sending it
1434
to the D-Bus. Default: no transform
1435
variant_level: D-Bus variant level. Default: 1
1436
"""
1437
attrname = "_{}".format(dbus_name)
1438
1439
def setter(self, value):
1440
if hasattr(self, "dbus_object_path"):
1441
if (not hasattr(self, attrname) or
1442
type_func(getattr(self, attrname, None))
1443
!= type_func(value)):
1444
if invalidate_only:
1445
self.PropertiesChanged(
1446
_interface, dbus.Dictionary(),
1447
dbus.Array((dbus_name, )))
1448
else:
1449
dbus_value = transform_func(
1450
type_func(value),
1451
variant_level = variant_level)
1452
self.PropertyChanged(dbus.String(dbus_name),
1453
dbus_value)
1454
self.PropertiesChanged(
1455
_interface,
1456
dbus.Dictionary({ dbus.String(dbus_name):
1457
dbus_value }),
1458
dbus.Array())
1459
setattr(self, attrname, value)
1460
1461
return property(lambda self: getattr(self, attrname), setter)
1462
1463
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1464
approvals_pending = notifychangeproperty(dbus.Boolean,
1465
"ApprovalPending",
1466
type_func = bool)
1467
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1468
last_enabled = notifychangeproperty(datetime_to_dbus,
1469
"LastEnabled")
1470
checker = notifychangeproperty(
1471
dbus.Boolean, "CheckerRunning",
1472
type_func = lambda checker: checker is not None)
1473
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1474
"LastCheckedOK")
1475
last_checker_status = notifychangeproperty(dbus.Int16,
1476
"LastCheckerStatus")
1477
last_approval_request = notifychangeproperty(
1478
datetime_to_dbus, "LastApprovalRequest")
1479
approved_by_default = notifychangeproperty(dbus.Boolean,
1480
"ApprovedByDefault")
1481
approval_delay = notifychangeproperty(
1482
dbus.UInt64, "ApprovalDelay",
1483
type_func = lambda td: td.total_seconds() * 1000)
1484
approval_duration = notifychangeproperty(
1485
dbus.UInt64, "ApprovalDuration",
1486
type_func = lambda td: td.total_seconds() * 1000)
1487
host = notifychangeproperty(dbus.String, "Host")
1488
timeout = notifychangeproperty(
1489
dbus.UInt64, "Timeout",
1490
type_func = lambda td: td.total_seconds() * 1000)
1491
extended_timeout = notifychangeproperty(
1492
dbus.UInt64, "ExtendedTimeout",
1493
type_func = lambda td: td.total_seconds() * 1000)
1494
interval = notifychangeproperty(
1495
dbus.UInt64, "Interval",
1496
type_func = lambda td: td.total_seconds() * 1000)
1497
checker_command = notifychangeproperty(dbus.String, "Checker")
1498
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1499
invalidate_only=True)
1500
1501
del notifychangeproperty
1502
1503
def __del__(self, *args, **kwargs):
1504
try:
1505
self.remove_from_connection()
1506
except LookupError:
1507
pass
1508
if hasattr(DBusObjectWithProperties, "__del__"):
1509
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1510
Client.__del__(self, *args, **kwargs)
1511
1512
def checker_callback(self, source, condition,
1513
connection, command, *args, **kwargs):
1514
ret = Client.checker_callback(self, source, condition,
1515
connection, command, *args,
1516
**kwargs)
1517
exitstatus = self.last_checker_status
1518
if exitstatus >= 0:
1519
# Emit D-Bus signal
1520
self.CheckerCompleted(dbus.Int16(exitstatus),
1521
# This is specific to GNU libC
1522
dbus.Int64(exitstatus << 8),
1523
dbus.String(command))
438
if self.use_dbus:
439
self.PropertyChanged(dbus.String(u"checker_running"),
440
dbus.Boolean(False, variant_level=1))
441
442
def still_valid(self):
443
"""Has the timeout not yet passed for this client?"""
444
if not getattr(self, "enabled", False):
445
return False
446
now = datetime.datetime.utcnow()
447
if self.last_checked_ok is None:
448
return now < (self.created + self.timeout)
1524
449
else:
1525
# Emit D-Bus signal
1526
self.CheckerCompleted(dbus.Int16(-1),
1527
dbus.Int64(
1528
# This is specific to GNU libC
1529
(exitstatus << 8)
1530
| self.last_checker_signal),
1531
dbus.String(command))
1532
return ret
1533
1534
def start_checker(self, *args, **kwargs):
1535
old_checker_pid = getattr(self.checker, "pid", None)
1536
r = Client.start_checker(self, *args, **kwargs)
1537
# Only if new checker process was started
1538
if (self.checker is not None
1539
and old_checker_pid != self.checker.pid):
1540
# Emit D-Bus signal
1541
self.CheckerStarted(self.current_checker_command)
1542
return r
1543
1544
def _reset_approved(self):
1545
self.approved = None
1546
return False
1547
1548
def approve(self, value=True):
1549
self.approved = value
1550
gobject.timeout_add(int(self.approval_duration.total_seconds()
1551
* 1000), self._reset_approved)
1552
self.send_changedstate()
1553
1554
## D-Bus methods, signals & properties
1555
1556
## Interfaces
1557
1558
## Signals
450
return now < (self.last_checked_ok + self.timeout)
451
452
## D-Bus methods & signals
453
_interface = u"se.bsnet.fukt.Mandos.Client"
454
455
# CheckedOK - method
456
CheckedOK = dbus.service.method(_interface)(checked_ok)
457
CheckedOK.__name__ = "CheckedOK"
1559
458
1560
459
# CheckerCompleted - signal
1561
460
@dbus.service.signal(_interface, signature="nxs")
1569
468
"D-Bus signal"
1570
469
pass
1571
470
471
# GetAllProperties - method
472
@dbus.service.method(_interface, out_signature="a{sv}")
473
def GetAllProperties(self):
474
"D-Bus method"
475
return dbus.Dictionary({
476
dbus.String("name"):
477
dbus.String(self.name, variant_level=1),
478
dbus.String("fingerprint"):
479
dbus.String(self.fingerprint, variant_level=1),
480
dbus.String("host"):
481
dbus.String(self.host, variant_level=1),
482
dbus.String("created"):
483
_datetime_to_dbus(self.created, variant_level=1),
484
dbus.String("last_enabled"):
485
(_datetime_to_dbus(self.last_enabled,
486
variant_level=1)
487
if self.last_enabled is not None
488
else dbus.Boolean(False, variant_level=1)),
489
dbus.String("enabled"):
490
dbus.Boolean(self.enabled, variant_level=1),
491
dbus.String("last_checked_ok"):
492
(_datetime_to_dbus(self.last_checked_ok,
493
variant_level=1)
494
if self.last_checked_ok is not None
495
else dbus.Boolean (False, variant_level=1)),
496
dbus.String("timeout"):
497
dbus.UInt64(self.timeout_milliseconds(),
498
variant_level=1),
499
dbus.String("interval"):
500
dbus.UInt64(self.interval_milliseconds(),
501
variant_level=1),
502
dbus.String("checker"):
503
dbus.String(self.checker_command,
504
variant_level=1),
505
dbus.String("checker_running"):
506
dbus.Boolean(self.checker is not None,
507
variant_level=1),
508
dbus.String("object_path"):
509
dbus.ObjectPath(self.dbus_object_path,
510
variant_level=1)
511
}, signature="sv")
512
513
# IsStillValid - method
514
IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
(still_valid))
516
IsStillValid.__name__ = "IsStillValid"
517
1572
518
# PropertyChanged - signal
1573
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1574
519
@dbus.service.signal(_interface, signature="sv")
1575
520
def PropertyChanged(self, property, value):
1576
521
"D-Bus signal"
1577
522
pass
1578
523
1579
# GotSecret - signal
1580
@dbus.service.signal(_interface)
1581
def GotSecret(self):
1582
"""D-Bus signal
1583
Is sent after a successful transfer of secret from the Mandos
1584
server to mandos-client
1585
"""
1586
pass
1587
1588
# Rejected - signal
1589
@dbus.service.signal(_interface, signature="s")
1590
def Rejected(self, reason):
1591
"D-Bus signal"
1592
pass
1593
1594
# NeedApproval - signal
1595
@dbus.service.signal(_interface, signature="tb")
1596
def NeedApproval(self, timeout, default):
1597
"D-Bus signal"
1598
return self.need_approval()
1599
1600
## Methods
1601
1602
# Approve - method
1603
@dbus.service.method(_interface, in_signature="b")
1604
def Approve(self, value):
1605
self.approve(value)
1606
1607
# CheckedOK - method
1608
@dbus.service.method(_interface)
1609
def CheckedOK(self):
1610
self.checked_ok()
524
# SetChecker - method
525
@dbus.service.method(_interface, in_signature="s")
526
def SetChecker(self, checker):
527
"D-Bus setter method"
528
self.checker_command = checker
529
# Emit D-Bus signal
530
self.PropertyChanged(dbus.String(u"checker"),
531
dbus.String(self.checker_command,
532
variant_level=1))
533
534
# SetHost - method
535
@dbus.service.method(_interface, in_signature="s")
536
def SetHost(self, host):
537
"D-Bus setter method"
538
self.host = host
539
# Emit D-Bus signal
540
self.PropertyChanged(dbus.String(u"host"),
541
dbus.String(self.host, variant_level=1))
542
543
# SetInterval - method
544
@dbus.service.method(_interface, in_signature="t")
545
def SetInterval(self, milliseconds):
546
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
547
# Emit D-Bus signal
548
self.PropertyChanged(dbus.String(u"interval"),
549
(dbus.UInt64(self.interval_milliseconds(),
550
variant_level=1)))
551
552
# SetSecret - method
553
@dbus.service.method(_interface, in_signature="ay",
554
byte_arrays=True)
555
def SetSecret(self, secret):
556
"D-Bus setter method"
557
self.secret = str(secret)
558
559
# SetTimeout - method
560
@dbus.service.method(_interface, in_signature="t")
561
def SetTimeout(self, milliseconds):
562
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
563
# Emit D-Bus signal
564
self.PropertyChanged(dbus.String(u"timeout"),
565
(dbus.UInt64(self.timeout_milliseconds(),
566
variant_level=1)))
1611
567
1612
568
# Enable - method
1613
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1614
@dbus.service.method(_interface)
1615
def Enable(self):
1616
"D-Bus method"
1617
self.enable()
569
Enable = dbus.service.method(_interface)(enable)
570
Enable.__name__ = "Enable"
1618
571
1619
572
# StartChecker - method
1620
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1621
573
@dbus.service.method(_interface)
1622
574
def StartChecker(self):
1623
575
"D-Bus method"
1624
576
self.start_checker()
1625
577
1626
578
# Disable - method
1627
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1628
579
@dbus.service.method(_interface)
1629
580
def Disable(self):
1630
581
"D-Bus method"
1631
582
self.disable()
1632
583
1633
584
# StopChecker - method
1634
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1635
@dbus.service.method(_interface)
1636
def StopChecker(self):
1637
self.stop_checker()
1638
1639
## Properties
1640
1641
# ApprovalPending - property
1642
@dbus_service_property(_interface, signature="b", access="read")
1643
def ApprovalPending_dbus_property(self):
1644
return dbus.Boolean(bool(self.approvals_pending))
1645
1646
# ApprovedByDefault - property
1647
@dbus_service_property(_interface,
1648
signature="b",
1649
access="readwrite")
1650
def ApprovedByDefault_dbus_property(self, value=None):
1651
if value is None: # get
1652
return dbus.Boolean(self.approved_by_default)
1653
self.approved_by_default = bool(value)
1654
1655
# ApprovalDelay - property
1656
@dbus_service_property(_interface,
1657
signature="t",
1658
access="readwrite")
1659
def ApprovalDelay_dbus_property(self, value=None):
1660
if value is None: # get
1661
return dbus.UInt64(self.approval_delay.total_seconds()
1662
* 1000)
1663
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1664
1665
# ApprovalDuration - property
1666
@dbus_service_property(_interface,
1667
signature="t",
1668
access="readwrite")
1669
def ApprovalDuration_dbus_property(self, value=None):
1670
if value is None: # get
1671
return dbus.UInt64(self.approval_duration.total_seconds()
1672
* 1000)
1673
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1674
1675
# Name - property
1676
@dbus_annotations(
1677
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1678
@dbus_service_property(_interface, signature="s", access="read")
1679
def Name_dbus_property(self):
1680
return dbus.String(self.name)
1681
1682
# Fingerprint - property
1683
@dbus_annotations(
1684
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1685
@dbus_service_property(_interface, signature="s", access="read")
1686
def Fingerprint_dbus_property(self):
1687
return dbus.String(self.fingerprint)
1688
1689
# Host - property
1690
@dbus_service_property(_interface,
1691
signature="s",
1692
access="readwrite")
1693
def Host_dbus_property(self, value=None):
1694
if value is None: # get
1695
return dbus.String(self.host)
1696
self.host = str(value)
1697
1698
# Created - property
1699
@dbus_annotations(
1700
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1701
@dbus_service_property(_interface, signature="s", access="read")
1702
def Created_dbus_property(self):
1703
return datetime_to_dbus(self.created)
1704
1705
# LastEnabled - property
1706
@dbus_service_property(_interface, signature="s", access="read")
1707
def LastEnabled_dbus_property(self):
1708
return datetime_to_dbus(self.last_enabled)
1709
1710
# Enabled - property
1711
@dbus_service_property(_interface,
1712
signature="b",
1713
access="readwrite")
1714
def Enabled_dbus_property(self, value=None):
1715
if value is None: # get
1716
return dbus.Boolean(self.enabled)
1717
if value:
1718
self.enable()
1719
else:
1720
self.disable()
1721
1722
# LastCheckedOK - property
1723
@dbus_service_property(_interface,
1724
signature="s",
1725
access="readwrite")
1726
def LastCheckedOK_dbus_property(self, value=None):
1727
if value is not None:
1728
self.checked_ok()
1729
return
1730
return datetime_to_dbus(self.last_checked_ok)
1731
1732
# LastCheckerStatus - property
1733
@dbus_service_property(_interface, signature="n", access="read")
1734
def LastCheckerStatus_dbus_property(self):
1735
return dbus.Int16(self.last_checker_status)
1736
1737
# Expires - property
1738
@dbus_service_property(_interface, signature="s", access="read")
1739
def Expires_dbus_property(self):
1740
return datetime_to_dbus(self.expires)
1741
1742
# LastApprovalRequest - property
1743
@dbus_service_property(_interface, signature="s", access="read")
1744
def LastApprovalRequest_dbus_property(self):
1745
return datetime_to_dbus(self.last_approval_request)
1746
1747
# Timeout - property
1748
@dbus_service_property(_interface,
1749
signature="t",
1750
access="readwrite")
1751
def Timeout_dbus_property(self, value=None):
1752
if value is None: # get
1753
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1754
old_timeout = self.timeout
1755
self.timeout = datetime.timedelta(0, 0, 0, value)
1756
# Reschedule disabling
1757
if self.enabled:
1758
now = datetime.datetime.utcnow()
1759
self.expires += self.timeout - old_timeout
1760
if self.expires <= now:
1761
# The timeout has passed
1762
self.disable()
1763
else:
1764
if (getattr(self, "disable_initiator_tag", None)
1765
is None):
1766
return
1767
gobject.source_remove(self.disable_initiator_tag)
1768
self.disable_initiator_tag = gobject.timeout_add(
1769
int((self.expires - now).total_seconds() * 1000),
1770
self.disable)
1771
1772
# ExtendedTimeout - property
1773
@dbus_service_property(_interface,
1774
signature="t",
1775
access="readwrite")
1776
def ExtendedTimeout_dbus_property(self, value=None):
1777
if value is None: # get
1778
return dbus.UInt64(self.extended_timeout.total_seconds()
1779
* 1000)
1780
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1781
1782
# Interval - property
1783
@dbus_service_property(_interface,
1784
signature="t",
1785
access="readwrite")
1786
def Interval_dbus_property(self, value=None):
1787
if value is None: # get
1788
return dbus.UInt64(self.interval.total_seconds() * 1000)
1789
self.interval = datetime.timedelta(0, 0, 0, value)
1790
if getattr(self, "checker_initiator_tag", None) is None:
1791
return
1792
if self.enabled:
1793
# Reschedule checker run
1794
gobject.source_remove(self.checker_initiator_tag)
1795
self.checker_initiator_tag = gobject.timeout_add(
1796
value, self.start_checker)
1797
self.start_checker() # Start one now, too
1798
1799
# Checker - property
1800
@dbus_service_property(_interface,
1801
signature="s",
1802
access="readwrite")
1803
def Checker_dbus_property(self, value=None):
1804
if value is None: # get
1805
return dbus.String(self.checker_command)
1806
self.checker_command = str(value)
1807
1808
# CheckerRunning - property
1809
@dbus_service_property(_interface,
1810
signature="b",
1811
access="readwrite")
1812
def CheckerRunning_dbus_property(self, value=None):
1813
if value is None: # get
1814
return dbus.Boolean(self.checker is not None)
1815
if value:
1816
self.start_checker()
1817
else:
1818
self.stop_checker()
1819
1820
# ObjectPath - property
1821
@dbus_annotations(
1822
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
1823
"org.freedesktop.DBus.Deprecated": "true"})
1824
@dbus_service_property(_interface, signature="o", access="read")
1825
def ObjectPath_dbus_property(self):
1826
return self.dbus_object_path # is already a dbus.ObjectPath
1827
1828
# Secret = property
1829
@dbus_annotations(
1830
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
1831
"invalidates"})
1832
@dbus_service_property(_interface,
1833
signature="ay",
1834
access="write",
1835
byte_arrays=True)
1836
def Secret_dbus_property(self, value):
1837
self.secret = bytes(value)
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
1838
587
1839
588
del _interface
1840
589
1841
590
1842
class ProxyClient(object):
1843
def __init__(self, child_pipe, fpr, address):
1844
self._pipe = child_pipe
1845
self._pipe.send(('init', fpr, address))
1846
if not self._pipe.recv():
1847
raise KeyError(fpr)
1848
1849
def __getattribute__(self, name):
1850
if name == '_pipe':
1851
return super(ProxyClient, self).__getattribute__(name)
1852
self._pipe.send(('getattr', name))
1853
data = self._pipe.recv()
1854
if data[0] == 'data':
1855
return data[1]
1856
if data[0] == 'function':
1857
1858
def func(*args, **kwargs):
1859
self._pipe.send(('funcall', name, args, kwargs))
1860
return self._pipe.recv()[1]
1861
1862
return func
1863
1864
def __setattr__(self, name, value):
1865
if name == '_pipe':
1866
return super(ProxyClient, self).__setattr__(name, value)
1867
self._pipe.send(('setattr', name, value))
1868
1869
1870
class ClientHandler(socketserver.BaseRequestHandler, object):
1871
"""A class to handle client connections.
1872
1873
Instantiated once for each connection to handle it.
591
def peer_certificate(session):
592
"Return the peer's OpenPGP certificate as a bytestring"
593
# If not an OpenPGP certificate...
594
if (gnutls.library.functions
595
.gnutls_certificate_type_get(session._c_object)
596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
# ...do the normal thing
598
return session.peer_certificate
599
list_size = ctypes.c_uint(1)
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
603
if not bool(cert_list) and list_size.value != 0:
604
raise gnutls.errors.GNUTLSError("error getting peer"
605
" certificate")
606
if list_size.value == 0:
607
return None
608
cert = cert_list[0]
609
return ctypes.string_at(cert.data, cert.size)
610
611
612
def fingerprint(openpgp):
613
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
# New GnuTLS "datum" with the OpenPGP public key
615
datum = (gnutls.library.types
616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
617
ctypes.POINTER
618
(ctypes.c_ubyte)),
619
ctypes.c_uint(len(openpgp))))
620
# New empty GnuTLS certificate
621
crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
624
# Import the OpenPGP public key into the certificate
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
627
gnutls.library.constants
628
.GNUTLS_OPENPGP_FMT_RAW))
629
# Verify the self signature in the key
630
crtverify = ctypes.c_uint()
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
633
if crtverify.value != 0:
634
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
635
raise gnutls.errors.CertificateSecurityError("Verify failed")
636
# New buffer for the fingerprint
637
buf = ctypes.create_string_buffer(20)
638
buf_len = ctypes.c_size_t()
639
# Get the fingerprint from the certificate into the buffer
640
(gnutls.library.functions
641
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
ctypes.byref(buf_len)))
643
# Deinit the certificate
644
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
# Convert the buffer to a Python bytestring
646
fpr = ctypes.string_at(buf, buf_len.value)
647
# Convert the bytestring to hexadecimal notation
648
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
return hex_fpr
650
651
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
653
"""A TCP request handler class.
654
Instantiated by IPv6_TCPServer for each request to handle it.
1874
655
Note: This will run in its own forked process."""
1875
656
1876
657
def handle(self):
1877
with contextlib.closing(self.server.child_pipe) as child_pipe:
1878
logger.info("TCP connection from: %s",
1879
str(self.client_address))
1880
logger.debug("Pipe FD: %d",
1881
self.server.child_pipe.fileno())
1882
1883
session = gnutls.connection.ClientSession(
1884
self.request, gnutls.connection .X509Credentials())
1885
1886
# Note: gnutls.connection.X509Credentials is really a
1887
# generic GnuTLS certificate credentials object so long as
1888
# no X.509 keys are added to it. Therefore, we can use it
1889
# here despite using OpenPGP certificates.
1890
1891
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1892
# "+AES-256-CBC", "+SHA1",
1893
# "+COMP-NULL", "+CTYPE-OPENPGP",
1894
# "+DHE-DSS"))
1895
# Use a fallback default, since this MUST be set.
1896
priority = self.server.gnutls_priority
1897
if priority is None:
1898
priority = "NORMAL"
1899
gnutls.library.functions.gnutls_priority_set_direct(
1900
session._c_object, priority, None)
1901
1902
# Start communication using the Mandos protocol
1903
# Get protocol number
1904
line = self.request.makefile().readline()
1905
logger.debug("Protocol version: %r", line)
1906
try:
1907
if int(line.strip().split()[0]) > 1:
1908
raise RuntimeError(line)
1909
except (ValueError, IndexError, RuntimeError) as error:
1910
logger.error("Unknown protocol version: %s", error)
1911
return
1912
1913
# Start GnuTLS connection
1914
try:
1915
session.handshake()
1916
except gnutls.errors.GNUTLSError as error:
1917
logger.warning("Handshake failed: %s", error)
1918
# Do not run session.bye() here: the session is not
1919
# established. Just abandon the request.
1920
return
1921
logger.debug("Handshake succeeded")
1922
1923
approval_required = False
1924
try:
1925
try:
1926
fpr = self.fingerprint(
1927
self.peer_certificate(session))
1928
except (TypeError,
1929
gnutls.errors.GNUTLSError) as error:
1930
logger.warning("Bad certificate: %s", error)
1931
return
1932
logger.debug("Fingerprint: %s", fpr)
1933
1934
try:
1935
client = ProxyClient(child_pipe, fpr,
1936
self.client_address)
1937
except KeyError:
1938
return
1939
1940
if client.approval_delay:
1941
delay = client.approval_delay
1942
client.approvals_pending += 1
1943
approval_required = True
1944
1945
while True:
1946
if not client.enabled:
1947
logger.info("Client %s is disabled",
1948
client.name)
1949
if self.server.use_dbus:
1950
# Emit D-Bus signal
1951
client.Rejected("Disabled")
1952
return
1953
1954
if client.approved or not client.approval_delay:
1955
#We are approved or approval is disabled
1956
break
1957
elif client.approved is None:
1958
logger.info("Client %s needs approval",
1959
client.name)
1960
if self.server.use_dbus:
1961
# Emit D-Bus signal
1962
client.NeedApproval(
1963
client.approval_delay.total_seconds()
1964
* 1000, client.approved_by_default)
1965
else:
1966
logger.warning("Client %s was not approved",
1967
client.name)
1968
if self.server.use_dbus:
1969
# Emit D-Bus signal
1970
client.Rejected("Denied")
1971
return
1972
1973
#wait until timeout or approved
1974
time = datetime.datetime.now()
1975
client.changedstate.acquire()
1976
client.changedstate.wait(delay.total_seconds())
1977
client.changedstate.release()
1978
time2 = datetime.datetime.now()
1979
if (time2 - time) >= delay:
1980
if not client.approved_by_default:
1981
logger.warning("Client %s timed out while"
1982
" waiting for approval",
1983
client.name)
1984
if self.server.use_dbus:
1985
# Emit D-Bus signal
1986
client.Rejected("Approval timed out")
1987
return
1988
else:
1989
break
1990
else:
1991
delay -= time2 - time
1992
1993
sent_size = 0
1994
while sent_size < len(client.secret):
1995
try:
1996
sent = session.send(client.secret[sent_size:])
1997
except gnutls.errors.GNUTLSError as error:
1998
logger.warning("gnutls send failed",
1999
exc_info=error)
2000
return
2001
logger.debug("Sent: %d, remaining: %d", sent,
2002
len(client.secret) - (sent_size
2003
+ sent))
2004
sent_size += sent
2005
2006
logger.info("Sending secret to %s", client.name)
2007
# bump the timeout using extended_timeout
2008
client.bump_timeout(client.extended_timeout)
2009
if self.server.use_dbus:
2010
# Emit D-Bus signal
2011
client.GotSecret()
2012
2013
finally:
2014
if approval_required:
2015
client.approvals_pending -= 1
2016
try:
2017
session.bye()
2018
except gnutls.errors.GNUTLSError as error:
2019
logger.warning("GnuTLS bye failed",
2020
exc_info=error)
2021
2022
@staticmethod
2023
def peer_certificate(session):
2024
"Return the peer's OpenPGP certificate as a bytestring"
2025
# If not an OpenPGP certificate...
2026
if (gnutls.library.functions.gnutls_certificate_type_get(
2027
session._c_object)
2028
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
2029
# ...do the normal thing
2030
return session.peer_certificate
2031
list_size = ctypes.c_uint(1)
2032
cert_list = (gnutls.library.functions
2033
.gnutls_certificate_get_peers
2034
(session._c_object, ctypes.byref(list_size)))
2035
if not bool(cert_list) and list_size.value != 0:
2036
raise gnutls.errors.GNUTLSError("error getting peer"
2037
" certificate")
2038
if list_size.value == 0:
2039
return None
2040
cert = cert_list[0]
2041
return ctypes.string_at(cert.data, cert.size)
2042
2043
@staticmethod
2044
def fingerprint(openpgp):
2045
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2046
# New GnuTLS "datum" with the OpenPGP public key
2047
datum = gnutls.library.types.gnutls_datum_t(
2048
ctypes.cast(ctypes.c_char_p(openpgp),
2049
ctypes.POINTER(ctypes.c_ubyte)),
2050
ctypes.c_uint(len(openpgp)))
2051
# New empty GnuTLS certificate
2052
crt = gnutls.library.types.gnutls_openpgp_crt_t()
2053
gnutls.library.functions.gnutls_openpgp_crt_init(
2054
ctypes.byref(crt))
2055
# Import the OpenPGP public key into the certificate
2056
gnutls.library.functions.gnutls_openpgp_crt_import(
2057
crt, ctypes.byref(datum),
2058
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2059
# Verify the self signature in the key
2060
crtverify = ctypes.c_uint()
2061
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
2062
crt, 0, ctypes.byref(crtverify))
2063
if crtverify.value != 0:
2064
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2065
raise gnutls.errors.CertificateSecurityError(
2066
"Verify failed")
2067
# New buffer for the fingerprint
2068
buf = ctypes.create_string_buffer(20)
2069
buf_len = ctypes.c_size_t()
2070
# Get the fingerprint from the certificate into the buffer
2071
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
2072
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2073
# Deinit the certificate
2074
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2075
# Convert the buffer to a Python bytestring
2076
fpr = ctypes.string_at(buf, buf_len.value)
2077
# Convert the bytestring to hexadecimal notation
2078
hex_fpr = binascii.hexlify(fpr).upper()
2079
return hex_fpr
2080
2081
2082
class MultiprocessingMixIn(object):
2083
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2084
2085
def sub_process_main(self, request, address):
2086
try:
2087
self.finish_request(request, address)
2088
except Exception:
2089
self.handle_error(request, address)
2090
self.close_request(request)
2091
2092
def process_request(self, request, address):
2093
"""Start a new process to process the request."""
2094
proc = multiprocessing.Process(target = self.sub_process_main,
2095
args = (request, address))
2096
proc.start()
2097
return proc
2098
2099
2100
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2101
""" adds a pipe to the MixIn """
2102
2103
def process_request(self, request, client_address):
2104
"""Overrides and wraps the original process_request().
2105
2106
This function creates a new pipe in self.pipe
2107
"""
2108
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2109
2110
proc = MultiprocessingMixIn.process_request(self, request,
2111
client_address)
2112
self.child_pipe.close()
2113
self.add_pipe(parent_pipe, proc)
2114
2115
def add_pipe(self, parent_pipe, proc):
2116
"""Dummy function; override as necessary"""
2117
raise NotImplementedError()
2118
2119
2120
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2121
socketserver.TCPServer, object):
2122
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2123
658
logger.info(u"TCP connection from: %s",
659
unicode(self.client_address))
660
session = (gnutls.connection
661
.ClientSession(self.request,
662
gnutls.connection
663
.X509Credentials()))
664
665
line = self.request.makefile().readline()
666
logger.debug(u"Protocol version: %r", line)
667
try:
668
if int(line.strip().split()[0]) > 1:
669
raise RuntimeError
670
except (ValueError, IndexError, RuntimeError), error:
671
logger.error(u"Unknown protocol version: %s", error)
672
return
673
674
# Note: gnutls.connection.X509Credentials is really a generic
675
# GnuTLS certificate credentials object so long as no X.509
676
# keys are added to it. Therefore, we can use it here despite
677
# using OpenPGP certificates.
678
679
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
680
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
# "+DHE-DSS"))
682
# Use a fallback default, since this MUST be set.
683
priority = self.server.settings.get("priority", "NORMAL")
684
(gnutls.library.functions
685
.gnutls_priority_set_direct(session._c_object,
686
priority, None))
687
688
try:
689
session.handshake()
690
except gnutls.errors.GNUTLSError, error:
691
logger.warning(u"Handshake failed: %s", error)
692
# Do not run session.bye() here: the session is not
693
# established. Just abandon the request.
694
return
695
logger.debug(u"Handshake succeeded")
696
try:
697
fpr = fingerprint(peer_certificate(session))
698
except (TypeError, gnutls.errors.GNUTLSError), error:
699
logger.warning(u"Bad certificate: %s", error)
700
session.bye()
701
return
702
logger.debug(u"Fingerprint: %s", fpr)
703
704
for c in self.server.clients:
705
if c.fingerprint == fpr:
706
client = c
707
break
708
else:
709
logger.warning(u"Client not found for fingerprint: %s",
710
fpr)
711
session.bye()
712
return
713
# Have to check if client.still_valid(), since it is possible
714
# that the client timed out while establishing the GnuTLS
715
# session.
716
if not client.still_valid():
717
logger.warning(u"Client %(name)s is invalid",
718
vars(client))
719
session.bye()
720
return
721
## This won't work here, since we're in a fork.
722
# client.checked_ok()
723
sent_size = 0
724
while sent_size < len(client.secret):
725
sent = session.send(client.secret[sent_size:])
726
logger.debug(u"Sent: %d, remaining: %d",
727
sent, len(client.secret)
728
- (sent_size + sent))
729
sent_size += sent
730
session.bye()
731
732
733
class IPv6_TCPServer(SocketServer.ForkingMixIn,
734
SocketServer.TCPServer, object):
735
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2124
736
Attributes:
737
settings: Server settings
738
clients: Set() of Client objects
2125
739
enabled: Boolean; whether this server is activated yet
2126
interface: None or a network interface name (string)
2127
use_ipv6: Boolean; to use IPv6 or not
2128
740
"""
2129
2130
def __init__(self, server_address, RequestHandlerClass,
2131
interface=None,
2132
use_ipv6=True,
2133
socketfd=None):
2134
"""If socketfd is set, use that file descriptor instead of
2135
creating a new one with socket.socket().
2136
"""
2137
self.interface = interface
2138
if use_ipv6:
2139
self.address_family = socket.AF_INET6
2140
if socketfd is not None:
2141
# Save the file descriptor
2142
self.socketfd = socketfd
2143
# Save the original socket.socket() function
2144
self.socket_socket = socket.socket
2145
# To implement --socket, we monkey patch socket.socket.
2146
#
2147
# (When socketserver.TCPServer is a new-style class, we
2148
# could make self.socket into a property instead of monkey
2149
# patching socket.socket.)
2150
#
2151
# Create a one-time-only replacement for socket.socket()
2152
@functools.wraps(socket.socket)
2153
def socket_wrapper(*args, **kwargs):
2154
# Restore original function so subsequent calls are
2155
# not affected.
2156
socket.socket = self.socket_socket
2157
del self.socket_socket
2158
# This time only, return a new socket object from the
2159
# saved file descriptor.
2160
return socket.fromfd(self.socketfd, *args, **kwargs)
2161
# Replace socket.socket() function with wrapper
2162
socket.socket = socket_wrapper
2163
# The socketserver.TCPServer.__init__ will call
2164
# socket.socket(), which might be our replacement,
2165
# socket_wrapper(), if socketfd was set.
2166
socketserver.TCPServer.__init__(self, server_address,
2167
RequestHandlerClass)
2168
741
address_family = socket.AF_INET6
742
def __init__(self, *args, **kwargs):
743
if "settings" in kwargs:
744
self.settings = kwargs["settings"]
745
del kwargs["settings"]
746
if "clients" in kwargs:
747
self.clients = kwargs["clients"]
748
del kwargs["clients"]
749
self.enabled = False
750
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2169
751
def server_bind(self):
2170
752
"""This overrides the normal server_bind() function
2171
753
to bind to an interface if one was specified, and also NOT to
2172
754
bind to an address or port if they were not specified."""
2173
if self.interface is not None:
2174
if SO_BINDTODEVICE is None:
2175
logger.error("SO_BINDTODEVICE does not exist;"
2176
" cannot bind to interface %s",
2177
self.interface)
2178
else:
2179
try:
2180
self.socket.setsockopt(
2181
socket.SOL_SOCKET, SO_BINDTODEVICE,
2182
(self.interface + "\0").encode("utf-8"))
2183
except socket.error as error:
2184
if error.errno == errno.EPERM:
2185
logger.error("No permission to bind to"
2186
" interface %s", self.interface)
2187
elif error.errno == errno.ENOPROTOOPT:
2188
logger.error("SO_BINDTODEVICE not available;"
2189
" cannot bind to interface %s",
2190
self.interface)
2191
elif error.errno == errno.ENODEV:
2192
logger.error("Interface %s does not exist,"
2193
" cannot bind", self.interface)
2194
else:
2195
raise
755
if self.settings["interface"]:
756
# 25 is from /usr/include/asm-i486/socket.h
757
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
758
try:
759
self.socket.setsockopt(socket.SOL_SOCKET,
760
SO_BINDTODEVICE,
761
self.settings["interface"])
762
except socket.error, error:
763
if error[0] == errno.EPERM:
764
logger.error(u"No permission to"
765
u" bind to interface %s",
766
self.settings["interface"])
767
else:
768
raise
2196
769
# Only bind(2) the socket if we really need to.
2197
770
if self.server_address[0] or self.server_address[1]:
2198
771
if not self.server_address[0]:
2199
if self.address_family == socket.AF_INET6:
2200
any_address = "::" # in6addr_any
2201
else:
2202
any_address = "0.0.0.0" # INADDR_ANY
2203
self.server_address = (any_address,
772
in6addr_any = "::"
773
self.server_address = (in6addr_any,
2204
774
self.server_address[1])
2205
775
elif not self.server_address[1]:
2206
self.server_address = (self.server_address[0], 0)
2207
# if self.interface:
776
self.server_address = (self.server_address[0],
777
0)
778
# if self.settings["interface"]:
2208
779
# self.server_address = (self.server_address[0],
2209
780
# 0, # port
2210
781
# 0, # flowinfo
2211
782
# if_nametoindex
2212
# (self.interface))
2213
return socketserver.TCPServer.server_bind(self)
2214
2215
2216
class MandosServer(IPv6_TCPServer):
2217
"""Mandos server.
2218
2219
Attributes:
2220
clients: set of Client objects
2221
gnutls_priority GnuTLS priority string
2222
use_dbus: Boolean; to emit D-Bus signals or not
2223
2224
Assumes a gobject.MainLoop event loop.
2225
"""
2226
2227
def __init__(self, server_address, RequestHandlerClass,
2228
interface=None,
2229
use_ipv6=True,
2230
clients=None,
2231
gnutls_priority=None,
2232
use_dbus=True,
2233
socketfd=None):
2234
self.enabled = False
2235
self.clients = clients
2236
if self.clients is None:
2237
self.clients = {}
2238
self.use_dbus = use_dbus
2239
self.gnutls_priority = gnutls_priority
2240
IPv6_TCPServer.__init__(self, server_address,
2241
RequestHandlerClass,
2242
interface = interface,
2243
use_ipv6 = use_ipv6,
2244
socketfd = socketfd)
2245
783
# (self.settings
784
# ["interface"]))
785
return super(IPv6_TCPServer, self).server_bind()
2246
786
def server_activate(self):
2247
787
if self.enabled:
2248
return socketserver.TCPServer.server_activate(self)
2249
788
return super(IPv6_TCPServer, self).server_activate()
2250
789
def enable(self):
2251
790
self.enabled = True
2252
2253
def add_pipe(self, parent_pipe, proc):
2254
# Call "handle_ipc" for both data and EOF events
2255
gobject.io_add_watch(
2256
parent_pipe.fileno(),
2257
gobject.IO_IN | gobject.IO_HUP,
2258
functools.partial(self.handle_ipc,
2259
parent_pipe = parent_pipe,
2260
proc = proc))
2261
2262
def handle_ipc(self, source, condition,
2263
parent_pipe=None,
2264
proc = None,
2265
client_object=None):
2266
# error, or the other end of multiprocessing.Pipe has closed
2267
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2268
# Wait for other process to exit
2269
proc.join()
2270
return False
2271
2272
# Read a request from the child
2273
request = parent_pipe.recv()
2274
command = request[0]
2275
2276
if command == 'init':
2277
fpr = request[1]
2278
address = request[2]
2279
2280
for c in self.clients.itervalues():
2281
if c.fingerprint == fpr:
2282
client = c
2283
break
2284
else:
2285
logger.info("Client not found for fingerprint: %s, ad"
2286
"dress: %s", fpr, address)
2287
if self.use_dbus:
2288
# Emit D-Bus signal
2289
mandos_dbus_service.ClientNotFound(fpr,
2290
address[0])
2291
parent_pipe.send(False)
2292
return False
2293
2294
gobject.io_add_watch(
2295
parent_pipe.fileno(),
2296
gobject.IO_IN | gobject.IO_HUP,
2297
functools.partial(self.handle_ipc,
2298
parent_pipe = parent_pipe,
2299
proc = proc,
2300
client_object = client))
2301
parent_pipe.send(True)
2302
# remove the old hook in favor of the new above hook on
2303
# same fileno
2304
return False
2305
if command == 'funcall':
2306
funcname = request[1]
2307
args = request[2]
2308
kwargs = request[3]
2309
2310
parent_pipe.send(('data', getattr(client_object,
2311
funcname)(*args,
2312
**kwargs)))
2313
2314
if command == 'getattr':
2315
attrname = request[1]
2316
if isinstance(client_object.__getattribute__(attrname),
2317
collections.Callable):
2318
parent_pipe.send(('function', ))
2319
else:
2320
parent_pipe.send((
2321
'data', client_object.__getattribute__(attrname)))
2322
2323
if command == 'setattr':
2324
attrname = request[1]
2325
value = request[2]
2326
setattr(client_object, attrname, value)
2327
2328
return True
2329
2330
2331
def rfc3339_duration_to_delta(duration):
2332
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2333
2334
>>> rfc3339_duration_to_delta("P7D")
2335
datetime.timedelta(7)
2336
>>> rfc3339_duration_to_delta("PT60S")
2337
datetime.timedelta(0, 60)
2338
>>> rfc3339_duration_to_delta("PT60M")
2339
datetime.timedelta(0, 3600)
2340
>>> rfc3339_duration_to_delta("PT24H")
2341
datetime.timedelta(1)
2342
>>> rfc3339_duration_to_delta("P1W")
2343
datetime.timedelta(7)
2344
>>> rfc3339_duration_to_delta("PT5M30S")
2345
datetime.timedelta(0, 330)
2346
>>> rfc3339_duration_to_delta("P1DT3M20S")
2347
datetime.timedelta(1, 200)
2348
"""
2349
2350
# Parsing an RFC 3339 duration with regular expressions is not
2351
# possible - there would have to be multiple places for the same
2352
# values, like seconds. The current code, while more esoteric, is
2353
# cleaner without depending on a parsing library. If Python had a
2354
# built-in library for parsing we would use it, but we'd like to
2355
# avoid excessive use of external libraries.
2356
2357
# New type for defining tokens, syntax, and semantics all-in-one
2358
Token = collections.namedtuple("Token", (
2359
"regexp", # To match token; if "value" is not None, must have
2360
# a "group" containing digits
2361
"value", # datetime.timedelta or None
2362
"followers")) # Tokens valid after this token
2363
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2364
# the "duration" ABNF definition in RFC 3339, Appendix A.
2365
token_end = Token(re.compile(r"$"), None, frozenset())
2366
token_second = Token(re.compile(r"(\d+)S"),
2367
datetime.timedelta(seconds=1),
2368
frozenset((token_end, )))
2369
token_minute = Token(re.compile(r"(\d+)M"),
2370
datetime.timedelta(minutes=1),
2371
frozenset((token_second, token_end)))
2372
token_hour = Token(re.compile(r"(\d+)H"),
2373
datetime.timedelta(hours=1),
2374
frozenset((token_minute, token_end)))
2375
token_time = Token(re.compile(r"T"),
2376
None,
2377
frozenset((token_hour, token_minute,
2378
token_second)))
2379
token_day = Token(re.compile(r"(\d+)D"),
2380
datetime.timedelta(days=1),
2381
frozenset((token_time, token_end)))
2382
token_month = Token(re.compile(r"(\d+)M"),
2383
datetime.timedelta(weeks=4),
2384
frozenset((token_day, token_end)))
2385
token_year = Token(re.compile(r"(\d+)Y"),
2386
datetime.timedelta(weeks=52),
2387
frozenset((token_month, token_end)))
2388
token_week = Token(re.compile(r"(\d+)W"),
2389
datetime.timedelta(weeks=1),
2390
frozenset((token_end, )))
2391
token_duration = Token(re.compile(r"P"), None,
2392
frozenset((token_year, token_month,
2393
token_day, token_time,
2394
token_week)))
2395
# Define starting values
2396
value = datetime.timedelta() # Value so far
2397
found_token = None
2398
followers = frozenset((token_duration, )) # Following valid tokens
2399
s = duration # String left to parse
2400
# Loop until end token is found
2401
while found_token is not token_end:
2402
# Search for any currently valid tokens
2403
for token in followers:
2404
match = token.regexp.match(s)
2405
if match is not None:
2406
# Token found
2407
if token.value is not None:
2408
# Value found, parse digits
2409
factor = int(match.group(1), 10)
2410
# Add to value so far
2411
value += factor * token.value
2412
# Strip token from string
2413
s = token.regexp.sub("", s, 1)
2414
# Go to found token
2415
found_token = token
2416
# Set valid next tokens
2417
followers = found_token.followers
2418
break
2419
else:
2420
# No currently valid tokens were found
2421
raise ValueError("Invalid RFC 3339 duration: {!r}"
2422
.format(duration))
2423
# End token found
2424
return value
2425
791
2426
792
2427
793
def string_to_delta(interval):
2435
801
datetime.timedelta(0, 3600)
2436
802
>>> string_to_delta('24h')
2437
803
datetime.timedelta(1)
2438
>>> string_to_delta('1w')
804
>>> string_to_delta(u'1w')
2439
805
datetime.timedelta(7)
2440
806
>>> string_to_delta('5m 30s')
2441
807
datetime.timedelta(0, 330)
2442
808
"""
2443
2444
try:
2445
return rfc3339_duration_to_delta(interval)
2446
except ValueError:
2447
pass
2448
2449
809
timevalue = datetime.timedelta(0)
2450
810
for s in interval.split():
2451
811
try:
2452
suffix = s[-1]
812
suffix = unicode(s[-1])
2453
813
value = int(s[:-1])
2454
if suffix == "d":
814
if suffix == u"d":
2455
815
delta = datetime.timedelta(value)
2456
elif suffix == "s":
816
elif suffix == u"s":
2457
817
delta = datetime.timedelta(0, value)
2458
elif suffix == "m":
818
elif suffix == u"m":
2459
819
delta = datetime.timedelta(0, 0, 0, 0, value)
2460
elif suffix == "h":
820
elif suffix == u"h":
2461
821
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2462
elif suffix == "w":
822
elif suffix == u"w":
2463
823
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2464
824
else:
2465
raise ValueError("Unknown suffix {!r}".format(suffix))
2466
except IndexError as e:
2467
raise ValueError(*(e.args))
825
raise ValueError
826
except (ValueError, IndexError):
827
raise ValueError
2468
828
timevalue += delta
2469
829
return timevalue
2470
830
2471
831
832
def server_state_changed(state):
833
"""Derived from the Avahi example code"""
834
if state == avahi.SERVER_COLLISION:
835
logger.error(u"Zeroconf server name collision")
836
service.remove()
837
elif state == avahi.SERVER_RUNNING:
838
service.add()
839
840
841
def entry_group_state_changed(state, error):
842
"""Derived from the Avahi example code"""
843
logger.debug(u"Avahi state change: %i", state)
844
845
if state == avahi.ENTRY_GROUP_ESTABLISHED:
846
logger.debug(u"Zeroconf service established.")
847
elif state == avahi.ENTRY_GROUP_COLLISION:
848
logger.warning(u"Zeroconf service name collision.")
849
service.rename()
850
elif state == avahi.ENTRY_GROUP_FAILURE:
851
logger.critical(u"Avahi: Error in group state changed %s",
852
unicode(error))
853
raise AvahiGroupError(u"State changed: %s" % unicode(error))
854
855
def if_nametoindex(interface):
856
"""Call the C function if_nametoindex(), or equivalent"""
857
global if_nametoindex
858
try:
859
if_nametoindex = (ctypes.cdll.LoadLibrary
860
(ctypes.util.find_library("c"))
861
.if_nametoindex)
862
except (OSError, AttributeError):
863
if "struct" not in sys.modules:
864
import struct
865
if "fcntl" not in sys.modules:
866
import fcntl
867
def if_nametoindex(interface):
868
"Get an interface index the hard way, i.e. using fcntl()"
869
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
870
with closing(socket.socket()) as s:
871
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
872
struct.pack("16s16x", interface))
873
interface_index = struct.unpack("I", ifreq[16:20])[0]
874
return interface_index
875
return if_nametoindex(interface)
876
877
2472
878
def daemon(nochdir = False, noclose = False):
2473
879
"""See daemon(3). Standard BSD Unix function.
2474
2475
880
This should really exist as os.daemon, but it doesn't (yet)."""
2476
881
if os.fork():
2477
882
sys.exit()
2482
887
sys.exit()
2483
888
if not noclose:
2484
889
# Close all standard open file descriptors
2485
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
890
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2486
891
if not stat.S_ISCHR(os.fstat(null).st_mode):
2487
892
raise OSError(errno.ENODEV,
2488
"{} not a character device"
2489
.format(os.devnull))
893
"/dev/null not a character device")
2490
894
os.dup2(null, sys.stdin.fileno())
2491
895
os.dup2(null, sys.stdout.fileno())
2492
896
os.dup2(null, sys.stderr.fileno())
2495
899
2496
900
2497
901
def main():
2498
2499
##################################################################
2500
# Parsing of options, both command line and config file
2501
2502
parser = argparse.ArgumentParser()
2503
parser.add_argument("-v", "--version", action="version",
2504
version = "%(prog)s {}".format(version),
2505
help="show version number and exit")
2506
parser.add_argument("-i", "--interface", metavar="IF",
2507
help="Bind to interface IF")
2508
parser.add_argument("-a", "--address",
2509
help="Address to listen for requests on")
2510
parser.add_argument("-p", "--port", type=int,
2511
help="Port number to receive requests on")
2512
parser.add_argument("--check", action="store_true",
2513
help="Run self-test")
2514
parser.add_argument("--debug", action="store_true",
2515
help="Debug mode; run in foreground and log"
2516
" to terminal", default=None)
2517
parser.add_argument("--debuglevel", metavar="LEVEL",
2518
help="Debug level for stdout output")
2519
parser.add_argument("--priority", help="GnuTLS"
2520
" priority string (see GnuTLS documentation)")
2521
parser.add_argument("--servicename",
2522
metavar="NAME", help="Zeroconf service name")
2523
parser.add_argument("--configdir",
2524
default="/etc/mandos", metavar="DIR",
2525
help="Directory to search for configuration"
2526
" files")
2527
parser.add_argument("--no-dbus", action="store_false",
2528
dest="use_dbus", help="Do not provide D-Bus"
2529
" system bus interface", default=None)
2530
parser.add_argument("--no-ipv6", action="store_false",
2531
dest="use_ipv6", help="Do not use IPv6",
2532
default=None)
2533
parser.add_argument("--no-restore", action="store_false",
2534
dest="restore", help="Do not restore stored"
2535
" state", default=None)
2536
parser.add_argument("--socket", type=int,
2537
help="Specify a file descriptor to a network"
2538
" socket to use instead of creating one")
2539
parser.add_argument("--statedir", metavar="DIR",
2540
help="Directory to save/restore state in")
2541
parser.add_argument("--foreground", action="store_true",
2542
help="Run in foreground", default=None)
2543
parser.add_argument("--no-zeroconf", action="store_false",
2544
dest="zeroconf", help="Do not use Zeroconf",
2545
default=None)
2546
2547
options = parser.parse_args()
902
parser = optparse.OptionParser(version = "%%prog %s" % version)
903
parser.add_option("-i", "--interface", type="string",
904
metavar="IF", help="Bind to interface IF")
905
parser.add_option("-a", "--address", type="string",
906
help="Address to listen for requests on")
907
parser.add_option("-p", "--port", type="int",
908
help="Port number to receive requests on")
909
parser.add_option("--check", action="store_true",
910
help="Run self-test")
911
parser.add_option("--debug", action="store_true",
912
help="Debug mode; run in foreground and log to"
913
" terminal")
914
parser.add_option("--priority", type="string", help="GnuTLS"
915
" priority string (see GnuTLS documentation)")
916
parser.add_option("--servicename", type="string", metavar="NAME",
917
help="Zeroconf service name")
918
parser.add_option("--configdir", type="string",
919
default="/etc/mandos", metavar="DIR",
920
help="Directory to search for configuration"
921
" files")
922
parser.add_option("--no-dbus", action="store_false",
923
dest="use_dbus",
924
help="Do not provide D-Bus system bus"
925
" interface")
926
options = parser.parse_args()[0]
2548
927
2549
928
if options.check:
2550
929
import doctest
2551
fail_count, test_count = doctest.testmod()
2552
sys.exit(os.EX_OK if fail_count == 0 else 1)
930
doctest.testmod()
931
sys.exit()
2553
932
2554
933
# Default values for config file for server-global settings
2555
934
server_defaults = { "interface": "",
2557
936
"port": "",
2558
937
"debug": "False",
2559
938
"priority":
2560
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2561
":+SIGN-DSA-SHA256",
939
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2562
940
"servicename": "Mandos",
2563
941
"use_dbus": "True",
2564
"use_ipv6": "True",
2565
"debuglevel": "",
2566
"restore": "True",
2567
"socket": "",
2568
"statedir": "/var/lib/mandos",
2569
"foreground": "False",
2570
"zeroconf": "True",
2571
}
942
}
2572
943
2573
944
# Parse config file for server-global settings
2574
server_config = configparser.SafeConfigParser(server_defaults)
945
server_config = ConfigParser.SafeConfigParser(server_defaults)
2575
946
del server_defaults
2576
947
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2577
948
# Convert the SafeConfigParser object to a dict
2578
949
server_settings = server_config.defaults()
2579
950
# Use the appropriate methods on the non-string config options
2580
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2581
server_settings[option] = server_config.getboolean("DEFAULT",
2582
option)
951
server_settings["debug"] = server_config.getboolean("DEFAULT",
952
"debug")
953
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
954
"use_dbus")
2583
955
if server_settings["port"]:
2584
956
server_settings["port"] = server_config.getint("DEFAULT",
2585
957
"port")
2586
if server_settings["socket"]:
2587
server_settings["socket"] = server_config.getint("DEFAULT",
2588
"socket")
2589
# Later, stdin will, and stdout and stderr might, be dup'ed
2590
# over with an opened os.devnull. But we don't want this to
2591
# happen with a supplied network socket.
2592
if 0 <= server_settings["socket"] <= 2:
2593
server_settings["socket"] = os.dup(server_settings
2594
["socket"])
2595
958
del server_config
2596
959
2597
960
# Override the settings from the config file with command line
2598
961
# options, if set.
2599
962
for option in ("interface", "address", "port", "debug",
2600
"priority", "servicename", "configdir", "use_dbus",
2601
"use_ipv6", "debuglevel", "restore", "statedir",
2602
"socket", "foreground", "zeroconf"):
963
"priority", "servicename", "configdir",
964
"use_dbus"):
2603
965
value = getattr(options, option)
2604
966
if value is not None:
2605
967
server_settings[option] = value
2606
968
del options
2607
# Force all strings to be unicode
2608
for option in server_settings.keys():
2609
if isinstance(server_settings[option], bytes):
2610
server_settings[option] = (server_settings[option]
2611
.decode("utf-8"))
2612
# Force all boolean options to be boolean
2613
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2614
"foreground", "zeroconf"):
2615
server_settings[option] = bool(server_settings[option])
2616
# Debug implies foreground
2617
if server_settings["debug"]:
2618
server_settings["foreground"] = True
2619
969
# Now we have our good server settings in "server_settings"
2620
970
2621
##################################################################
2622
2623
if (not server_settings["zeroconf"]
2624
and not (server_settings["port"]
2625
or server_settings["socket"] != "")):
2626
parser.error("Needs port or socket to work without Zeroconf")
2627
2628
971
# For convenience
2629
972
debug = server_settings["debug"]
2630
debuglevel = server_settings["debuglevel"]
2631
973
use_dbus = server_settings["use_dbus"]
2632
use_ipv6 = server_settings["use_ipv6"]
2633
stored_state_path = os.path.join(server_settings["statedir"],
2634
stored_state_file)
2635
foreground = server_settings["foreground"]
2636
zeroconf = server_settings["zeroconf"]
2637
974
2638
if debug:
2639
initlogger(debug, logging.DEBUG)
2640
else:
2641
if not debuglevel:
2642
initlogger(debug)
2643
else:
2644
level = getattr(logging, debuglevel.upper())
2645
initlogger(debug, level)
975
if not debug:
976
syslogger.setLevel(logging.WARNING)
977
console.setLevel(logging.WARNING)
2646
978
2647
979
if server_settings["servicename"] != "Mandos":
2648
syslogger.setFormatter(
2649
logging.Formatter('Mandos ({}) [%(process)d]:'
2650
' %(levelname)s: %(message)s'.format(
2651
server_settings["servicename"])))
980
syslogger.setFormatter(logging.Formatter
981
('Mandos (%s): %%(levelname)s:'
982
' %%(message)s'
983
% server_settings["servicename"]))
2652
984
2653
985
# Parse config file with clients
2654
client_config = configparser.SafeConfigParser(Client
2655
.client_defaults)
986
client_defaults = { "timeout": "1h",
987
"interval": "5m",
988
"checker": "fping -q -- %%(host)s",
989
"host": "",
990
}
991
client_config = ConfigParser.SafeConfigParser(client_defaults)
2656
992
client_config.read(os.path.join(server_settings["configdir"],
2657
993
"clients.conf"))
2658
994
2659
global mandos_dbus_service
2660
mandos_dbus_service = None
2661
2662
socketfd = None
2663
if server_settings["socket"] != "":
2664
socketfd = server_settings["socket"]
2665
tcp_server = MandosServer(
2666
(server_settings["address"], server_settings["port"]),
2667
ClientHandler,
2668
interface=(server_settings["interface"] or None),
2669
use_ipv6=use_ipv6,
2670
gnutls_priority=server_settings["priority"],
2671
use_dbus=use_dbus,
2672
socketfd=socketfd)
2673
if not foreground:
2674
pidfilename = "/run/mandos.pid"
2675
if not os.path.isdir("/run/."):
2676
pidfilename = "/var/run/mandos.pid"
2677
pidfile = None
2678
try:
2679
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2680
except IOError as e:
2681
logger.error("Could not open file %r", pidfilename,
2682
exc_info=e)
2683
2684
for name in ("_mandos", "mandos", "nobody"):
2685
try:
2686
uid = pwd.getpwnam(name).pw_uid
2687
gid = pwd.getpwnam(name).pw_gid
2688
break
995
clients = Set()
996
tcp_server = IPv6_TCPServer((server_settings["address"],
997
server_settings["port"]),
998
TCP_handler,
999
settings=server_settings,
1000
clients=clients)
1001
pidfilename = "/var/run/mandos.pid"
1002
try:
1003
pidfile = open(pidfilename, "w")
1004
except IOError:
1005
logger.error("Could not open file %r", pidfilename)
1006
1007
try:
1008
uid = pwd.getpwnam("_mandos").pw_uid
1009
gid = pwd.getpwnam("_mandos").pw_gid
1010
except KeyError:
1011
try:
1012
uid = pwd.getpwnam("mandos").pw_uid
1013
gid = pwd.getpwnam("mandos").pw_gid
2689
1014
except KeyError:
2690
continue
2691
else:
2692
uid = 65534
2693
gid = 65534
1015
try:
1016
uid = pwd.getpwnam("nobody").pw_uid
1017
gid = pwd.getpwnam("nogroup").pw_gid
1018
except KeyError:
1019
uid = 65534
1020
gid = 65534
2694
1021
try:
2695
1022
os.setgid(gid)
2696
1023
os.setuid(uid)
2697
except OSError as error:
2698
if error.errno != errno.EPERM:
2699
raise
1024
except OSError, error:
1025
if error[0] != errno.EPERM:
1026
raise error
2700
1027
1028
# Enable all possible GnuTLS debugging
2701
1029
if debug:
2702
# Enable all possible GnuTLS debugging
2703
2704
1030
# "Use a log level over 10 to enable all debugging options."
2705
1031
# - GnuTLS manual
2706
1032
gnutls.library.functions.gnutls_global_set_log_level(11)
2709
1035
def debug_gnutls(level, string):
2710
1036
logger.debug("GnuTLS: %s", string[:-1])
2711
1037
2712
gnutls.library.functions.gnutls_global_set_log_function(
2713
debug_gnutls)
2714
2715
# Redirect stdin so all checkers get /dev/null
2716
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2717
os.dup2(null, sys.stdin.fileno())
2718
if null > 2:
2719
os.close(null)
2720
2721
# Need to fork before connecting to D-Bus
2722
if not foreground:
2723
# Close all input and output, do double fork, etc.
2724
daemon()
2725
2726
# multiprocessing will use threads, so before we use gobject we
2727
# need to inform gobject that threads will be used.
2728
gobject.threads_init()
1038
(gnutls.library.functions
1039
.gnutls_global_set_log_function(debug_gnutls))
1040
1041
global service
1042
service = AvahiService(name = server_settings["servicename"],
1043
servicetype = "_mandos._tcp", )
1044
if server_settings["interface"]:
1045
service.interface = (if_nametoindex
1046
(server_settings["interface"]))
2729
1047
2730
1048
global main_loop
1049
global bus
1050
global server
2731
1051
# From the Avahi example code
2732
DBusGMainLoop(set_as_default=True)
1052
DBusGMainLoop(set_as_default=True )
2733
1053
main_loop = gobject.MainLoop()
2734
1054
bus = dbus.SystemBus()
1055
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
avahi.DBUS_PATH_SERVER),
1057
avahi.DBUS_INTERFACE_SERVER)
2735
1058
# End of Avahi example code
2736
1059
if use_dbus:
2737
try:
2738
bus_name = dbus.service.BusName("se.recompile.Mandos",
2739
bus,
2740
do_not_queue=True)
2741
old_bus_name = dbus.service.BusName(
2742
"se.bsnet.fukt.Mandos", bus,
2743
do_not_queue=True)
2744
except dbus.exceptions.DBusException as e:
2745
logger.error("Disabling D-Bus:", exc_info=e)
2746
use_dbus = False
2747
server_settings["use_dbus"] = False
2748
tcp_server.use_dbus = False
2749
if zeroconf:
2750
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2751
service = AvahiServiceToSyslog(
2752
name = server_settings["servicename"],
2753
servicetype = "_mandos._tcp",
2754
protocol = protocol,
2755
bus = bus)
2756
if server_settings["interface"]:
2757
service.interface = if_nametoindex(
2758
server_settings["interface"].encode("utf-8"))
2759
2760
global multiprocessing_manager
2761
multiprocessing_manager = multiprocessing.Manager()
2762
2763
client_class = Client
2764
if use_dbus:
2765
client_class = functools.partial(ClientDBus, bus = bus)
2766
2767
client_settings = Client.config_parser(client_config)
2768
old_client_settings = {}
2769
clients_data = {}
2770
2771
# This is used to redirect stdout and stderr for checker processes
2772
global wnull
2773
wnull = open(os.devnull, "w") # A writable /dev/null
2774
# Only used if server is running in foreground but not in debug
2775
# mode
2776
if debug or not foreground:
2777
wnull.close()
2778
2779
# Get client data and settings from last running state.
2780
if server_settings["restore"]:
2781
try:
2782
with open(stored_state_path, "rb") as stored_state:
2783
clients_data, old_client_settings = pickle.load(
2784
stored_state)
2785
os.remove(stored_state_path)
2786
except IOError as e:
2787
if e.errno == errno.ENOENT:
2788
logger.warning("Could not load persistent state:"
2789
" {}".format(os.strerror(e.errno)))
2790
else:
2791
logger.critical("Could not load persistent state:",
2792
exc_info=e)
2793
raise
2794
except EOFError as e:
2795
logger.warning("Could not load persistent state: "
2796
"EOFError:",
2797
exc_info=e)
2798
2799
with PGPEngine() as pgp:
2800
for client_name, client in clients_data.items():
2801
# Skip removed clients
2802
if client_name not in client_settings:
2803
continue
2804
2805
# Decide which value to use after restoring saved state.
2806
# We have three different values: Old config file,
2807
# new config file, and saved state.
2808
# New config value takes precedence if it differs from old
2809
# config value, otherwise use saved state.
2810
for name, value in client_settings[client_name].items():
2811
try:
2812
# For each value in new config, check if it
2813
# differs from the old config value (Except for
2814
# the "secret" attribute)
2815
if (name != "secret"
2816
and (value !=
2817
old_client_settings[client_name][name])):
2818
client[name] = value
2819
except KeyError:
2820
pass
2821
2822
# Clients who has passed its expire date can still be
2823
# enabled if its last checker was successful. A Client
2824
# whose checker succeeded before we stored its state is
2825
# assumed to have successfully run all checkers during
2826
# downtime.
2827
if client["enabled"]:
2828
if datetime.datetime.utcnow() >= client["expires"]:
2829
if not client["last_checked_ok"]:
2830
logger.warning(
2831
"disabling client {} - Client never "
2832
"performed a successful checker".format(
2833
client_name))
2834
client["enabled"] = False
2835
elif client["last_checker_status"] != 0:
2836
logger.warning(
2837
"disabling client {} - Client last"
2838
" checker failed with error code"
2839
" {}".format(
2840
client_name,
2841
client["last_checker_status"]))
2842
client["enabled"] = False
2843
else:
2844
client["expires"] = (
2845
datetime.datetime.utcnow()
2846
+ client["timeout"])
2847
logger.debug("Last checker succeeded,"
2848
" keeping {} enabled".format(
2849
client_name))
2850
try:
2851
client["secret"] = pgp.decrypt(
2852
client["encrypted_secret"],
2853
client_settings[client_name]["secret"])
2854
except PGPError:
2855
# If decryption fails, we use secret from new settings
2856
logger.debug("Failed to decrypt {} old secret".format(
2857
client_name))
2858
client["secret"] = (client_settings[client_name]
2859
["secret"])
2860
2861
# Add/remove clients based on new changes made to config
2862
for client_name in (set(old_client_settings)
2863
- set(client_settings)):
2864
del clients_data[client_name]
2865
for client_name in (set(client_settings)
2866
- set(old_client_settings)):
2867
clients_data[client_name] = client_settings[client_name]
2868
2869
# Create all client objects
2870
for client_name, client in clients_data.items():
2871
tcp_server.clients[client_name] = client_class(
2872
name = client_name,
2873
settings = client,
2874
server_settings = server_settings)
2875
2876
if not tcp_server.clients:
2877
logger.warning("No clients defined")
2878
2879
if not foreground:
2880
if pidfile is not None:
2881
pid = os.getpid()
2882
try:
2883
with pidfile:
2884
print(pid, file=pidfile)
2885
except IOError:
2886
logger.error("Could not write to file %r with PID %d",
2887
pidfilename, pid)
1060
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1061
1062
clients.update(Set(Client(name = section,
1063
config
1064
= dict(client_config.items(section)),
1065
use_dbus = use_dbus)
1066
for section in client_config.sections()))
1067
if not clients:
1068
logger.warning(u"No clients defined")
1069
1070
if debug:
1071
# Redirect stdin so all checkers get /dev/null
1072
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1073
os.dup2(null, sys.stdin.fileno())
1074
if null > 2:
1075
os.close(null)
1076
else:
1077
# No console logging
1078
logger.removeHandler(console)
1079
# Close all input and output, do double fork, etc.
1080
daemon()
1081
1082
try:
1083
pid = os.getpid()
1084
pidfile.write(str(pid) + "\n")
1085
pidfile.close()
2888
1086
del pidfile
2889
del pidfilename
2890
1087
except IOError:
1088
logger.error(u"Could not write to file %r with PID %d",
1089
pidfilename, pid)
1090
except NameError:
1091
# "pidfile" was never created
1092
pass
1093
del pidfilename
1094
1095
def cleanup():
1096
"Cleanup function; run on exit"
1097
global group
1098
# From the Avahi example code
1099
if not group is None:
1100
group.Free()
1101
group = None
1102
# End of Avahi example code
1103
1104
while clients:
1105
client = clients.pop()
1106
client.disable_hook = None
1107
client.disable()
1108
1109
atexit.register(cleanup)
1110
1111
if not debug:
1112
signal.signal(signal.SIGINT, signal.SIG_IGN)
2891
1113
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2892
1114
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2893
1115
2894
1116
if use_dbus:
2895
2896
@alternate_dbus_interfaces(
2897
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2898
class MandosDBusService(DBusObjectWithObjectManager):
1117
class MandosServer(dbus.service.Object):
2899
1118
"""A D-Bus proxy object"""
2900
2901
1119
def __init__(self):
2902
1120
dbus.service.Object.__init__(self, bus, "/")
2903
2904
_interface = "se.recompile.Mandos"
2905
2906
@dbus.service.signal(_interface, signature="o")
2907
def ClientAdded(self, objpath):
2908
"D-Bus signal"
2909
pass
2910
2911
@dbus.service.signal(_interface, signature="ss")
2912
def ClientNotFound(self, fingerprint, address):
2913
"D-Bus signal"
2914
pass
2915
2916
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2917
"true"})
1121
_interface = u"se.bsnet.fukt.Mandos"
1122
1123
@dbus.service.signal(_interface, signature="oa{sv}")
1124
def ClientAdded(self, objpath, properties):
1125
"D-Bus signal"
1126
pass
1127
2918
1128
@dbus.service.signal(_interface, signature="os")
2919
1129
def ClientRemoved(self, objpath, name):
2920
1130
"D-Bus signal"
2921
1131
pass
2922
1132
2923
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2924
"true"})
2925
1133
@dbus.service.method(_interface, out_signature="ao")
2926
1134
def GetAllClients(self):
2927
1135
"D-Bus method"
2928
return dbus.Array(c.dbus_object_path for c in
2929
tcp_server.clients.itervalues())
1136
return dbus.Array(c.dbus_object_path for c in clients)
2930
1137
2931
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2932
"true"})
2933
@dbus.service.method(_interface,
2934
out_signature="a{oa{sv}}")
1138
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2935
1139
def GetAllClientsWithProperties(self):
2936
1140
"D-Bus method"
2937
1141
return dbus.Dictionary(
2938
{ c.dbus_object_path: c.GetAll(
2939
"se.recompile.Mandos.Client")
2940
for c in tcp_server.clients.itervalues() },
1142
((c.dbus_object_path, c.GetAllProperties())
1143
for c in clients),
2941
1144
signature="oa{sv}")
2942
1145
2943
1146
@dbus.service.method(_interface, in_signature="o")
2944
1147
def RemoveClient(self, object_path):
2945
1148
"D-Bus method"
2946
for c in tcp_server.clients.itervalues():
1149
for c in clients:
2947
1150
if c.dbus_object_path == object_path:
2948
del tcp_server.clients[c.name]
2949
c.remove_from_connection()
2950
# Don't signal the disabling
2951
c.disable(quiet=True)
2952
# Emit D-Bus signal for removal
2953
self.client_removed_signal(c)
1151
clients.remove(c)
1152
# Don't signal anything except ClientRemoved
1153
c.use_dbus = False
1154
c.disable()
1155
# Emit D-Bus signal
1156
self.ClientRemoved(object_path, c.name)
2954
1157
return
2955
raise KeyError(object_path)
1158
raise KeyError
2956
1159
2957
1160
del _interface
2958
2959
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
2960
out_signature = "a{oa{sa{sv}}}")
2961
def GetManagedObjects(self):
2962
"""D-Bus method"""
2963
return dbus.Dictionary(
2964
{ client.dbus_object_path:
2965
dbus.Dictionary(
2966
{ interface: client.GetAll(interface)
2967
for interface in
2968
client._get_all_interface_names()})
2969
for client in tcp_server.clients.values()})
2970
2971
def client_added_signal(self, client):
2972
"""Send the new standard signal and the old signal"""
2973
if use_dbus:
2974
# New standard signal
2975
self.InterfacesAdded(
2976
client.dbus_object_path,
2977
dbus.Dictionary(
2978
{ interface: client.GetAll(interface)
2979
for interface in
2980
client._get_all_interface_names()}))
2981
# Old signal
2982
self.ClientAdded(client.dbus_object_path)
2983
2984
def client_removed_signal(self, client):
2985
"""Send the new standard signal and the old signal"""
2986
if use_dbus:
2987
# New standard signal
2988
self.InterfacesRemoved(
2989
client.dbus_object_path,
2990
client._get_all_interface_names())
2991
# Old signal
2992
self.ClientRemoved(client.dbus_object_path,
2993
client.name)
2994
2995
mandos_dbus_service = MandosDBusService()
2996
2997
def cleanup():
2998
"Cleanup function; run on exit"
2999
if zeroconf:
3000
service.cleanup()
3001
3002
multiprocessing.active_children()
3003
wnull.close()
3004
if not (tcp_server.clients or client_settings):
3005
return
3006
3007
# Store client before exiting. Secrets are encrypted with key
3008
# based on what config file has. If config file is
3009
# removed/edited, old secret will thus be unrecovable.
3010
clients = {}
3011
with PGPEngine() as pgp:
3012
for client in tcp_server.clients.itervalues():
3013
key = client_settings[client.name]["secret"]
3014
client.encrypted_secret = pgp.encrypt(client.secret,
3015
key)
3016
client_dict = {}
3017
3018
# A list of attributes that can not be pickled
3019
# + secret.
3020
exclude = { "bus", "changedstate", "secret",
3021
"checker", "server_settings" }
3022
for name, typ in inspect.getmembers(dbus.service
3023
.Object):
3024
exclude.add(name)
3025
3026
client_dict["encrypted_secret"] = (client
3027
.encrypted_secret)
3028
for attr in client.client_structure:
3029
if attr not in exclude:
3030
client_dict[attr] = getattr(client, attr)
3031
3032
clients[client.name] = client_dict
3033
del client_settings[client.name]["secret"]
3034
3035
try:
3036
with tempfile.NamedTemporaryFile(
3037
mode='wb',
3038
suffix=".pickle",
3039
prefix='clients-',
3040
dir=os.path.dirname(stored_state_path),
3041
delete=False) as stored_state:
3042
pickle.dump((clients, client_settings), stored_state)
3043
tempname = stored_state.name
3044
os.rename(tempname, stored_state_path)
3045
except (IOError, OSError) as e:
3046
if not debug:
3047
try:
3048
os.remove(tempname)
3049
except NameError:
3050
pass
3051
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3052
logger.warning("Could not save persistent state: {}"
3053
.format(os.strerror(e.errno)))
3054
else:
3055
logger.warning("Could not save persistent state:",
3056
exc_info=e)
3057
raise
3058
3059
# Delete all clients, and settings from config
3060
while tcp_server.clients:
3061
name, client = tcp_server.clients.popitem()
3062
if use_dbus:
3063
client.remove_from_connection()
3064
# Don't signal the disabling
3065
client.disable(quiet=True)
3066
# Emit D-Bus signal for removal
3067
mandos_dbus_service.client_removed_signal(client)
3068
client_settings.clear()
3069
3070
atexit.register(cleanup)
3071
3072
for client in tcp_server.clients.itervalues():
1161
1162
mandos_server = MandosServer()
1163
1164
for client in clients:
3073
1165
if use_dbus:
3074
# Emit D-Bus signal for adding
3075
mandos_dbus_service.client_added_signal(client)
3076
# Need to initiate checking of clients
3077
if client.enabled:
3078
client.init_checker()
1166
# Emit D-Bus signal
1167
mandos_server.ClientAdded(client.dbus_object_path,
1168
client.GetAllProperties())
1169
client.enable()
3079
1170
3080
1171
tcp_server.enable()
3081
1172
tcp_server.server_activate()
3082
1173
3083
1174
# Find out what port we got
3084
if zeroconf:
3085
service.port = tcp_server.socket.getsockname()[1]
3086
if use_ipv6:
3087
logger.info("Now listening on address %r, port %d,"
3088
" flowinfo %d, scope_id %d",
3089
*tcp_server.socket.getsockname())
3090
else: # IPv4
3091
logger.info("Now listening on address %r, port %d",
3092
*tcp_server.socket.getsockname())
1175
service.port = tcp_server.socket.getsockname()[1]
1176
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1177
u" scope_id %d" % tcp_server.socket.getsockname())
3093
1178
3094
1179
#service.interface = tcp_server.socket.getsockname()[3]
3095
1180
3096
1181
try:
3097
if zeroconf:
3098
# From the Avahi example code
3099
try:
3100
service.activate()
3101
except dbus.exceptions.DBusException as error:
3102
logger.critical("D-Bus Exception", exc_info=error)
3103
cleanup()
3104
sys.exit(1)
3105
# End of Avahi example code
1182
# From the Avahi example code
1183
server.connect_to_signal("StateChanged", server_state_changed)
1184
try:
1185
server_state_changed(server.GetState())
1186
except dbus.exceptions.DBusException, error:
1187
logger.critical(u"DBusException: %s", error)
1188
sys.exit(1)
1189
# End of Avahi example code
3106
1190
3107
1191
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
3108
1192
lambda *args, **kwargs:
3109
1193
(tcp_server.handle_request
3110
1194
(*args[2:], **kwargs) or True))
3111
1195
3112
logger.debug("Starting main loop")
1196
logger.debug(u"Starting main loop")
3113
1197
main_loop.run()
3114
except AvahiError as error:
3115
logger.critical("Avahi Error", exc_info=error)
3116
cleanup()
1198
except AvahiError, error:
1199
logger.critical(u"AvahiError: %s", error)
3117
1200
sys.exit(1)
3118
1201
except KeyboardInterrupt:
3119
1202
if debug:
3120
print("", file=sys.stderr)
1203
print >> sys.stderr
3121
1204
logger.debug("Server received KeyboardInterrupt")
3122
1205
logger.debug("Server exiting")
3123
# Must run before the D-Bus bus name gets deregistered
3124
cleanup()
3125
3126
1206
3127
1207
if __name__ == '__main__':
3128
1208
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0