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- Committer: Teddy Hogeborn
- Date: 2015-08-02 09:36:40 UTC
- Revision ID: teddy@recompile.se-20150802093640-nc0n17rbmqlbaxuf
Add D-Bus annotations on a few properties on the Client object.
The D-Bus property "Secret" on the interface
"se.recompile.Mandos.Client" should have the annotation
"org.freedesktop.DBus.Property.EmitsChangedSignal" set to
"invalidates". Also, the properties "Created", "Fingerprint", "Name",
and "ObjectPath" should have the same annotation set to "const".
* mandos (ClientDBus.Name_dbus_property): Set annotation
"org.freedesktop.DBus.Property.EmitsChangedSignal"
to "const".
(ClientDBus.Fingerprint_dbus_property): - '' -
(ClientDBus.Created_dbus_property): - '' -
(ClientDBus.ObjectPath_dbus_property): - '' -
(ClientDBus.Secret_dbus_property): Set annotation
"org.freedesktop.DBus.Property.EmitsChangedSignal"
to "invalidates".
The D-Bus property "Secret" on the interface
"se.recompile.Mandos.Client" should have the annotation
"org.freedesktop.DBus.Property.EmitsChangedSignal" set to
"invalidates". Also, the properties "Created", "Fingerprint", "Name",
and "ObjectPath" should have the same annotation set to "const".
* mandos (ClientDBus.Name_dbus_property): Set annotation
"org.freedesktop.DBus.Property.EmitsChangedSignal"
to "const".
(ClientDBus.Fingerprint_dbus_property): - '' -
(ClientDBus.Created_dbus_property): - '' -
(ClientDBus.ObjectPath_dbus_property): - '' -
(ClientDBus.Secret_dbus_property): Set annotation
"org.freedesktop.DBus.Property.EmitsChangedSignal"
to "invalidates".
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
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" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
15
16
#
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
27
28
# along with this program. If not, see
28
29
# <http://www.gnu.org/licenses/>.
29
30
#
30
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
31
32
#
32
33
33
from __future__ import division
34
35
import SocketServer
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
36
43
import socket
37
from optparse import OptionParser
44
import argparse
38
45
import datetime
39
46
import errno
40
47
import gnutls.crypto
43
50
import gnutls.library.functions
44
51
import gnutls.library.constants
45
52
import gnutls.library.types
46
import ConfigParser
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
47
57
import sys
48
58
import re
49
59
import os
50
60
import signal
51
from sets import Set
52
61
import subprocess
53
62
import atexit
54
63
import stat
55
64
import logging
56
65
import logging.handlers
57
66
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
58
82
59
83
import dbus
60
import gobject
84
import dbus.service
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
61
89
import avahi
62
90
from dbus.mainloop.glib import DBusGMainLoop
63
91
import ctypes
64
92
import ctypes.util
65
66
version = "1.0.2"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
74
logger.addHandler(syslogger)
75
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
79
logger.addHandler(console)
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
80
236
81
237
class AvahiError(Exception):
82
def __init__(self, value):
238
def __init__(self, value, *args, **kwargs):
83
239
self.value = value
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
87
243
88
244
class AvahiServiceError(AvahiError):
89
245
pass
90
246
247
91
248
class AvahiGroupError(AvahiError):
92
249
pass
93
250
94
251
95
252
class AvahiService(object):
96
253
"""An Avahi (Zeroconf) service.
254
97
255
Attributes:
98
256
interface: integer; avahi.IF_UNSPEC or an interface index.
99
257
Used to optionally bind to the specified interface.
100
258
name: string; Example: 'Mandos'
101
259
type: string; Example: '_mandos._tcp'.
102
See <http://www.dns-sd.org/ServiceTypes.html>
260
See <https://www.iana.org/assignments/service-names-port-numbers>
103
261
port: integer; what port to announce
104
262
TXT: list of strings; TXT record for the service
105
263
domain: string; Domain to publish on, default to .local if empty.
107
265
max_renames: integer; maximum number of renames
108
266
rename_count: integer; counter so we only rename after collisions
109
267
a sensible number of times
268
group: D-Bus Entry Group
269
server: D-Bus Server
270
bus: dbus.SystemBus()
110
271
"""
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
272
273
def __init__(self,
274
interface = avahi.IF_UNSPEC,
275
name = None,
276
servicetype = None,
277
port = None,
278
TXT = None,
279
domain = "",
280
host = "",
281
max_renames = 32768,
282
protocol = avahi.PROTO_UNSPEC,
283
bus = None):
114
284
self.interface = interface
115
285
self.name = name
116
286
self.type = servicetype
117
287
self.port = port
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
288
self.TXT = TXT if TXT is not None else []
122
289
self.domain = domain
123
290
self.host = host
124
291
self.rename_count = 0
125
292
self.max_renames = max_renames
126
def rename(self):
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
300
"""Derived from the Avahi example code"""
128
301
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
302
logger.critical("No suitable Zeroconf service name found"
303
" after %i retries, exiting.",
131
304
self.rename_count)
132
305
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
141
308
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
142
325
def remove(self):
143
326
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
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
146
333
def add(self):
147
334
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
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()
172
447
173
448
class Client(object):
174
449
"""A representation of a client host served by this server.
450
175
451
Attributes:
176
name: string; from the config file, used in log messages
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
455
checker: subprocess.Popen(); a running checker process used
456
to see if the client lives.
457
'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
461
runtime with vars(self) as dict, so that for
462
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()
177
470
fingerprint: string (40 or 32 hexadecimal digits); used to
178
471
uniquely identify the client
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
185
interval: datetime.timedelta(); How often to start a new checker
186
stop_hook: If set, called by stop() as stop_hook(self)
187
checker: subprocess.Popen(); a running checker process used
188
to see if the client lives.
189
'None' if no process is running.
190
checker_initiator_tag: a gobject event source tag, or None
191
stop_initiator_tag: - '' -
192
checker_callback_tag: - '' -
193
checker_command: string; External command which is run to check if
194
client lives. %() expansions are done at
195
runtime with vars(self) as dict, so that for
196
instance %(name)s can be used in the command.
197
Private attibutes:
198
_timeout: Real variable for 'timeout'
199
_interval: Real variable for 'interval'
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
201
_interval_milliseconds: - '' -
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()
202
492
"""
203
def _set_timeout(self, timeout):
204
"Setter function for 'timeout' attribute"
205
self._timeout = timeout
206
self._timeout_milliseconds = ((self.timeout.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.timeout.seconds * 1000)
209
+ (self.timeout.microseconds
210
// 1000))
211
timeout = property(lambda self: self._timeout,
212
_set_timeout)
213
del _set_timeout
214
def _set_interval(self, interval):
215
"Setter function for 'interval' attribute"
216
self._interval = interval
217
self._interval_milliseconds = ((self.interval.days
218
* 24 * 60 * 60 * 1000)
219
+ (self.interval.seconds
220
* 1000)
221
+ (self.interval.microseconds
222
// 1000))
223
interval = property(lambda self: self._interval,
224
_set_interval)
225
del _set_interval
226
def __init__(self, name = None, stop_hook=None, config=None):
227
"""Note: the 'checker' key in 'config' sets the
228
'checker_command' attribute and *not* the 'checker'
229
attribute."""
230
if config is None:
231
config = {}
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):
232
562
self.name = name
233
logger.debug(u"Creating client %r", self.name)
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
236
# function
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(os.path.expanduser(os.path.expandvars
244
(config["secfile"])))
245
self.secret = secfile.read()
246
secfile.close()
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)
247
576
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.now()
252
self.last_checked_ok = None
253
self.timeout = string_to_delta(config["timeout"])
254
self.interval = string_to_delta(config["interval"])
255
self.stop_hook = stop_hook
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
256
586
self.checker = None
257
587
self.checker_initiator_tag = None
258
self.stop_initiator_tag = None
588
self.disable_initiator_tag = None
259
589
self.checker_callback_tag = None
260
self.check_command = config["checker"]
261
def start(self):
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()
609
610
def enable(self):
262
611
"""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
self.last_enabled = datetime.datetime.utcnow()
618
self.init_checker()
619
self.send_changedstate()
620
621
def disable(self, quiet=True):
622
"""Disable this client."""
623
if not getattr(self, "enabled", False):
624
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:
628
gobject.source_remove(self.disable_initiator_tag)
629
self.disable_initiator_tag = None
630
self.expires = None
631
if getattr(self, "checker_initiator_tag", None) is not None:
632
gobject.source_remove(self.checker_initiator_tag)
633
self.checker_initiator_tag = None
634
self.stop_checker()
635
self.enabled = False
636
if not quiet:
637
self.send_changedstate()
638
# Do not run this again if called by a gobject.timeout_add
639
return False
640
641
def __del__(self):
642
self.disable()
643
644
def init_checker(self):
263
645
# Schedule a new checker to be started an 'interval' from now,
264
646
# and every interval from then on.
265
self.checker_initiator_tag = gobject.timeout_add\
266
(self._interval_milliseconds,
267
self.start_checker)
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)
268
657
# Also start a new checker *right now*.
269
658
self.start_checker()
270
# Schedule a stop() when 'timeout' has passed
271
self.stop_initiator_tag = gobject.timeout_add\
272
(self._timeout_milliseconds,
273
self.stop)
274
def stop(self):
275
"""Stop this client.
276
The possibility that a client might be restarted is left open,
277
but not currently used."""
278
# If this client doesn't have a secret, it is already stopped.
279
if hasattr(self, "secret") and self.secret:
280
logger.info(u"Stopping client %s", self.name)
281
self.secret = None
282
else:
283
return False
284
if getattr(self, "stop_initiator_tag", False):
285
gobject.source_remove(self.stop_initiator_tag)
286
self.stop_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
288
gobject.source_remove(self.checker_initiator_tag)
289
self.checker_initiator_tag = None
290
self.stop_checker()
291
if self.stop_hook:
292
self.stop_hook(self)
293
# Do not run this again if called by a gobject.timeout_add
294
return False
295
def __del__(self):
296
self.stop_hook = None
297
self.stop()
298
def checker_callback(self, pid, condition):
659
660
def checker_callback(self, source, condition, connection,
661
command):
299
662
"""The checker has completed, so take appropriate actions."""
300
now = datetime.datetime.now()
301
663
self.checker_callback_tag = None
302
664
self.checker = None
303
if os.WIFEXITED(condition) \
304
and (os.WEXITSTATUS(condition) == 0):
305
logger.info(u"Checker for %(name)s succeeded",
306
vars(self))
307
self.last_checked_ok = now
308
gobject.source_remove(self.stop_initiator_tag)
309
self.stop_initiator_tag = gobject.timeout_add\
310
(self._timeout_milliseconds,
311
self.stop)
312
elif not os.WIFEXITED(condition):
313
logger.warning(u"Checker for %(name)s crashed?",
665
# Read return code from connection (see call_pipe)
666
returncode = connection.recv()
667
connection.close()
668
669
if returncode >= 0:
670
self.last_checker_status = returncode
671
self.last_checker_signal = None
672
if self.last_checker_status == 0:
673
logger.info("Checker for %(name)s succeeded",
674
vars(self))
675
self.checked_ok()
676
else:
677
logger.info("Checker for %(name)s failed", vars(self))
678
else:
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
681
logger.warning("Checker for %(name)s crashed?",
314
682
vars(self))
315
else:
316
logger.info(u"Checker for %(name)s failed",
317
vars(self))
683
return False
684
685
def checked_ok(self):
686
"""Assert that the client has been seen, alive and well."""
687
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()
706
318
707
def start_checker(self):
319
708
"""Start a new checker subprocess if one is not running.
709
320
710
If a checker already exists, leave it running and do
321
711
nothing."""
322
712
# The reason for not killing a running checker is that if we
323
# did that, then if a checker (for some reason) started
324
# running slowly and taking more than 'interval' time, the
325
# client would inevitably timeout, since no checker would get
326
# a chance to run to completion. If we instead leave running
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
327
717
# checkers alone, the checker would have to take more time
328
# than 'timeout' for the client to be declared invalid, which
329
# is as it should be.
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
330
726
if self.checker is None:
331
try:
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
334
except TypeError:
335
# Escape attributes for the shell
336
escaped_attrs = dict((key, re.escape(str(val)))
337
for key, val in
338
vars(self).iteritems())
339
try:
340
command = self.check_command % escaped_attrs
341
except TypeError, error:
342
logger.error(u'Could not format string "%s":'
343
u' %s', self.check_command, error)
344
return True # Try again later
345
try:
346
logger.info(u"Starting checker %r for %s",
347
command, self.name)
348
# We don't need to redirect stdout and stderr, since
349
# in normal mode, that is already done by daemon(),
350
# and in debug mode we don't want to. (Stdin is
351
# always replaced by /dev/null.)
352
self.checker = subprocess.Popen(command,
353
close_fds=True,
354
shell=True, cwd="/")
355
self.checker_callback_tag = gobject.child_watch_add\
356
(self.checker.pid,
357
self.checker_callback)
358
except OSError, error:
359
logger.error(u"Failed to start subprocess: %s",
360
error)
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)
361
764
# Re-run this periodically if run by gobject.timeout_add
362
765
return True
766
363
767
def stop_checker(self):
364
768
"""Force the checker process, if any, to stop."""
365
769
if self.checker_callback_tag:
367
771
self.checker_callback_tag = None
368
772
if getattr(self, "checker", None) is None:
369
773
return
370
logger.debug(u"Stopping checker for %(name)s", vars(self))
371
try:
372
os.kill(self.checker.pid, signal.SIGTERM)
373
#os.sleep(0.5)
374
#if self.checker.poll() is None:
375
# os.kill(self.checker.pid, signal.SIGKILL)
376
except OSError, error:
377
if error.errno != errno.ESRCH: # No such process
378
raise
774
logger.debug("Stopping checker for %(name)s", vars(self))
775
self.checker.terminate()
379
776
self.checker = None
380
def still_valid(self):
381
"""Has the timeout not yet passed for this client?"""
382
now = datetime.datetime.now()
383
if self.last_checked_ok is None:
384
return now < (self.created + self.timeout)
385
else:
386
return now < (self.last_checked_ok + self.timeout)
387
388
389
def peer_certificate(session):
390
"Return the peer's OpenPGP certificate as a bytestring"
391
# If not an OpenPGP certificate...
392
if gnutls.library.functions.gnutls_certificate_type_get\
393
(session._c_object) \
394
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
395
# ...do the normal thing
396
return session.peer_certificate
397
list_size = ctypes.c_uint()
398
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
399
(session._c_object, ctypes.byref(list_size))
400
if list_size.value == 0:
401
return None
402
cert = cert_list[0]
403
return ctypes.string_at(cert.data, cert.size)
404
405
406
def fingerprint(openpgp):
407
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
408
# New GnuTLS "datum" with the OpenPGP public key
409
datum = gnutls.library.types.gnutls_datum_t\
410
(ctypes.cast(ctypes.c_char_p(openpgp),
411
ctypes.POINTER(ctypes.c_ubyte)),
412
ctypes.c_uint(len(openpgp)))
413
# New empty GnuTLS certificate
414
crt = gnutls.library.types.gnutls_openpgp_crt_t()
415
gnutls.library.functions.gnutls_openpgp_crt_init\
416
(ctypes.byref(crt))
417
# Import the OpenPGP public key into the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_import\
419
(crt, ctypes.byref(datum),
420
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
421
# Verify the self signature in the key
422
crtverify = ctypes.c_uint()
423
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
424
(crt, 0, ctypes.byref(crtverify))
425
if crtverify.value != 0:
426
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
427
raise gnutls.errors.CertificateSecurityError("Verify failed")
428
# New buffer for the fingerprint
429
buf = ctypes.create_string_buffer(20)
430
buf_len = ctypes.c_size_t()
431
# Get the fingerprint from the certificate into the buffer
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
433
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
434
# Deinit the certificate
435
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
436
# Convert the buffer to a Python bytestring
437
fpr = ctypes.string_at(buf, buf_len.value)
438
# Convert the bytestring to hexadecimal notation
439
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
440
return hex_fpr
441
442
443
class TCP_handler(SocketServer.BaseRequestHandler, object):
444
"""A TCP request handler class.
445
Instantiated by IPv6_TCPServer for each request to handle it.
777
778
779
def dbus_service_property(dbus_interface,
780
signature="v",
781
access="readwrite",
782
byte_arrays=False):
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
become properties on the D-Bus.
785
786
The decorated method will be called with no arguments by "Get"
787
and with one argument by "Set".
788
789
The parameters, where they are supported, are the same as
790
dbus.service.method, except there is only "signature", since the
791
type from Get() and the type sent to Set() is the same.
792
"""
793
# Encoding deeply encoded byte arrays is not supported yet by the
794
# "Set" method, so we fail early here:
795
if byte_arrays and signature != "ay":
796
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {!r}".format(signature))
798
799
def decorator(func):
800
func._dbus_is_property = True
801
func._dbus_interface = dbus_interface
802
func._dbus_signature = signature
803
func._dbus_access = access
804
func._dbus_name = func.__name__
805
if func._dbus_name.endswith("_dbus_property"):
806
func._dbus_name = func._dbus_name[:-14]
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
808
return func
809
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
831
return decorator
832
833
834
def dbus_annotations(annotations):
835
"""Decorator to annotate D-Bus methods, signals or properties
836
Usage:
837
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
@dbus_service_property("org.example.Interface", signature="b",
842
access="r")
843
def Property_dbus_property(self):
844
return dbus.Boolean(False)
845
"""
846
847
def decorator(func):
848
func._dbus_annotations = annotations
849
return func
850
851
return decorator
852
853
854
class DBusPropertyException(dbus.exceptions.DBusException):
855
"""A base class for D-Bus property-related exceptions
856
"""
857
pass
858
859
860
class DBusPropertyAccessException(DBusPropertyException):
861
"""A property's access permissions disallows an operation.
862
"""
863
pass
864
865
866
class DBusPropertyNotFound(DBusPropertyException):
867
"""An attempt was made to access a non-existing property.
868
"""
869
pass
870
871
872
class DBusObjectWithProperties(dbus.service.Object):
873
"""A D-Bus object with properties.
874
875
Classes inheriting from this can use the dbus_service_property
876
decorator to expose methods as D-Bus properties. It exposes the
877
standard Get(), Set(), and GetAll() methods on the D-Bus.
878
"""
879
880
@staticmethod
881
def _is_dbus_thing(thing):
882
"""Returns a function testing if an attribute is a D-Bus thing
883
884
If called like _is_dbus_thing("method") it returns a function
885
suitable for use as predicate to inspect.getmembers().
886
"""
887
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
888
False)
889
890
def _get_all_dbus_things(self, thing):
891
"""Returns a generator of (name, attribute) pairs
892
"""
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
894
athing.__get__(self))
895
for cls in self.__class__.__mro__
896
for name, athing in
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
898
899
def _get_dbus_property(self, interface_name, property_name):
900
"""Returns a bound method if one exists which is a D-Bus
901
property with the specified name and interface.
902
"""
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
906
if (value._dbus_name == property_name
907
and value._dbus_interface == interface_name):
908
return value.__get__(self)
909
910
# No such property
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
913
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
915
in_signature="ss",
916
out_signature="v")
917
def Get(self, interface_name, property_name):
918
"""Standard D-Bus property Get() method, see D-Bus standard.
919
"""
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "write":
922
raise DBusPropertyAccessException(property_name)
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
return value
926
return type(value)(value, variant_level=value.variant_level+1)
927
928
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
def Set(self, interface_name, property_name, value):
930
"""Standard D-Bus property Set() method, see D-Bus standard.
931
"""
932
prop = self._get_dbus_property(interface_name, property_name)
933
if prop._dbus_access == "read":
934
raise DBusPropertyAccessException(property_name)
935
if prop._dbus_get_args_options["byte_arrays"]:
936
# The byte_arrays option is not supported yet on
937
# signatures other than "ay".
938
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
944
prop(value)
945
946
@dbus.service.method(dbus.PROPERTIES_IFACE,
947
in_signature="s",
948
out_signature="a{sv}")
949
def GetAll(self, interface_name):
950
"""Standard D-Bus property GetAll() method, see D-Bus
951
standard.
952
953
Note: Will not include properties with access="write".
954
"""
955
properties = {}
956
for name, prop in self._get_all_dbus_things("property"):
957
if (interface_name
958
and interface_name != prop._dbus_interface):
959
# Interface non-empty but did not match
960
continue
961
# Ignore write-only properties
962
if prop._dbus_access == "write":
963
continue
964
value = prop()
965
if not hasattr(value, "variant_level"):
966
properties[name] = value
967
continue
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
970
return dbus.Dictionary(properties, signature="sv")
971
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
976
standard.
977
"""
978
pass
979
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
981
out_signature="s",
982
path_keyword='object_path',
983
connection_keyword='connection')
984
def Introspect(self, object_path, connection):
985
"""Overloading of standard D-Bus method.
986
987
Inserts property tags and interface annotation tags.
988
"""
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
990
connection)
991
try:
992
document = xml.dom.minidom.parseString(xmlstring)
993
994
def make_tag(document, name, prop):
995
e = document.createElement("property")
996
e.setAttribute("name", name)
997
e.setAttribute("type", prop._dbus_signature)
998
e.setAttribute("access", prop._dbus_access)
999
return e
1000
1001
for if_tag in document.getElementsByTagName("interface"):
1002
# Add property tags
1003
for tag in (make_tag(document, name, prop)
1004
for name, prop
1005
in self._get_all_dbus_things("property")
1006
if prop._dbus_interface
1007
== if_tag.getAttribute("name")):
1008
if_tag.appendChild(tag)
1009
# Add annotation tags
1010
for typ in ("method", "signal", "property"):
1011
for tag in if_tag.getElementsByTagName(typ):
1012
annots = dict()
1013
for name, prop in (self.
1014
_get_all_dbus_things(typ)):
1015
if (name == tag.getAttribute("name")
1016
and prop._dbus_interface
1017
== if_tag.getAttribute("name")):
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
1021
ann_tag = document.createElement(
1022
"annotation")
1023
ann_tag.setAttribute("name", name)
1024
ann_tag.setAttribute("value", value)
1025
tag.appendChild(ann_tag)
1026
# Add interface annotation tags
1027
for annotation, value in dict(
1028
itertools.chain.from_iterable(
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
1032
if name == if_tag.getAttribute("name")
1033
)).items():
1034
ann_tag = document.createElement("annotation")
1035
ann_tag.setAttribute("name", annotation)
1036
ann_tag.setAttribute("value", value)
1037
if_tag.appendChild(ann_tag)
1038
# Add the names to the return values for the
1039
# "org.freedesktop.DBus.Properties" methods
1040
if (if_tag.getAttribute("name")
1041
== "org.freedesktop.DBus.Properties"):
1042
for cn in if_tag.getElementsByTagName("method"):
1043
if cn.getAttribute("name") == "Get":
1044
for arg in cn.getElementsByTagName("arg"):
1045
if (arg.getAttribute("direction")
1046
== "out"):
1047
arg.setAttribute("name", "value")
1048
elif cn.getAttribute("name") == "GetAll":
1049
for arg in cn.getElementsByTagName("arg"):
1050
if (arg.getAttribute("direction")
1051
== "out"):
1052
arg.setAttribute("name", "props")
1053
xmlstring = document.toxml("utf-8")
1054
document.unlink()
1055
except (AttributeError, xml.dom.DOMException,
1056
xml.parsers.expat.ExpatError) as error:
1057
logger.error("Failed to override Introspection method",
1058
exc_info=error)
1059
return xmlstring
1060
1061
1062
def datetime_to_dbus(dt, variant_level=0):
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1064
if dt is None:
1065
return dbus.String("", variant_level = variant_level)
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
1067
1068
1069
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1070
"""A class decorator; applied to a subclass of
1071
dbus.service.Object, it will add alternate D-Bus attributes with
1072
interface names according to the "alt_interface_names" mapping.
1073
Usage:
1074
1075
@alternate_dbus_interfaces({"org.example.Interface":
1076
"net.example.AlternateInterface"})
1077
class SampleDBusObject(dbus.service.Object):
1078
@dbus.service.method("org.example.Interface")
1079
def SampleDBusMethod():
1080
pass
1081
1082
The above "SampleDBusMethod" on "SampleDBusObject" will be
1083
reachable via two interfaces: "org.example.Interface" and
1084
"net.example.AlternateInterface", the latter of which will have
1085
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1086
"true", unless "deprecate" is passed with a False value.
1087
1088
This works for methods and signals, and also for D-Bus properties
1089
(from DBusObjectWithProperties) and interfaces (from the
1090
dbus_interface_annotations decorator).
1091
"""
1092
1093
def wrapper(cls):
1094
for orig_interface_name, alt_interface_name in (
1095
alt_interface_names.items()):
1096
attr = {}
1097
interface_names = set()
1098
# Go though all attributes of the class
1099
for attrname, attribute in inspect.getmembers(cls):
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
1101
# with the wrong interface name
1102
if (not hasattr(attribute, "_dbus_interface")
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
1105
continue
1106
# Create an alternate D-Bus interface name based on
1107
# the current name
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1110
interface_names.add(alt_interface)
1111
# Is this a D-Bus signal?
1112
if getattr(attribute, "_dbus_is_signal", False):
1113
if sys.version_info.major == 2:
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
1117
zip(attribute.func_code.co_freevars,
1118
attribute.__closure__))
1119
["func"].cell_contents)
1120
else:
1121
nonmethod_func = attribute
1122
# Create a new, but exactly alike, function
1123
# object, and decorate it to be a new D-Bus signal
1124
# with the alternate D-Bus interface name
1125
if sys.version_info.major == 2:
1126
new_function = types.FunctionType(
1127
nonmethod_func.func_code,
1128
nonmethod_func.func_globals,
1129
nonmethod_func.func_name,
1130
nonmethod_func.func_defaults,
1131
nonmethod_func.func_closure)
1132
else:
1133
new_function = types.FunctionType(
1134
nonmethod_func.__code__,
1135
nonmethod_func.__globals__,
1136
nonmethod_func.__name__,
1137
nonmethod_func.__defaults__,
1138
nonmethod_func.__closure__)
1139
new_function = (dbus.service.signal(
1140
alt_interface,
1141
attribute._dbus_signature)(new_function))
1142
# Copy annotations, if any
1143
try:
1144
new_function._dbus_annotations = dict(
1145
attribute._dbus_annotations)
1146
except AttributeError:
1147
pass
1148
# Define a creator of a function to call both the
1149
# original and alternate functions, so both the
1150
# original and alternate signals gets sent when
1151
# the function is called
1152
def fixscope(func1, func2):
1153
"""This function is a scope container to pass
1154
func1 and func2 to the "call_both" function
1155
outside of its arguments"""
1156
1157
def call_both(*args, **kwargs):
1158
"""This function will emit two D-Bus
1159
signals by calling func1 and func2"""
1160
func1(*args, **kwargs)
1161
func2(*args, **kwargs)
1162
1163
return call_both
1164
# Create the "call_both" function and add it to
1165
# the class
1166
attr[attrname] = fixscope(attribute, new_function)
1167
# Is this a D-Bus method?
1168
elif getattr(attribute, "_dbus_is_method", False):
1169
# Create a new, but exactly alike, function
1170
# object. Decorate it to be a new D-Bus method
1171
# with the alternate D-Bus interface name. Add it
1172
# to the class.
1173
attr[attrname] = (
1174
dbus.service.method(
1175
alt_interface,
1176
attribute._dbus_in_signature,
1177
attribute._dbus_out_signature)
1178
(types.FunctionType(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
# Copy annotations, if any
1184
try:
1185
attr[attrname]._dbus_annotations = dict(
1186
attribute._dbus_annotations)
1187
except AttributeError:
1188
pass
1189
# Is this a D-Bus property?
1190
elif getattr(attribute, "_dbus_is_property", False):
1191
# Create a new, but exactly alike, function
1192
# object, and decorate it to be a new D-Bus
1193
# property with the alternate D-Bus interface
1194
# name. Add it to the class.
1195
attr[attrname] = (dbus_service_property(
1196
alt_interface, attribute._dbus_signature,
1197
attribute._dbus_access,
1198
attribute._dbus_get_args_options
1199
["byte_arrays"])
1200
(types.FunctionType(
1201
attribute.func_code,
1202
attribute.func_globals,
1203
attribute.func_name,
1204
attribute.func_defaults,
1205
attribute.func_closure)))
1206
# Copy annotations, if any
1207
try:
1208
attr[attrname]._dbus_annotations = dict(
1209
attribute._dbus_annotations)
1210
except AttributeError:
1211
pass
1212
# Is this a D-Bus interface?
1213
elif getattr(attribute, "_dbus_is_interface", False):
1214
# Create a new, but exactly alike, function
1215
# object. Decorate it to be a new D-Bus interface
1216
# with the alternate D-Bus interface name. Add it
1217
# to the class.
1218
attr[attrname] = (
1219
dbus_interface_annotations(alt_interface)
1220
(types.FunctionType(attribute.func_code,
1221
attribute.func_globals,
1222
attribute.func_name,
1223
attribute.func_defaults,
1224
attribute.func_closure)))
1225
if deprecate:
1226
# Deprecate all alternate interfaces
1227
iname="_AlternateDBusNames_interface_annotation{}"
1228
for interface_name in interface_names:
1229
1230
@dbus_interface_annotations(interface_name)
1231
def func(self):
1232
return { "org.freedesktop.DBus.Deprecated":
1233
"true" }
1234
# Find an unused name
1235
for aname in (iname.format(i)
1236
for i in itertools.count()):
1237
if aname not in attr:
1238
attr[aname] = func
1239
break
1240
if interface_names:
1241
# Replace the class with a new subclass of it with
1242
# methods, signals, etc. as created above.
1243
cls = type(b"{}Alternate".format(cls.__name__),
1244
(cls, ), attr)
1245
return cls
1246
1247
return wrapper
1248
1249
1250
@alternate_dbus_interfaces({"se.recompile.Mandos":
1251
"se.bsnet.fukt.Mandos"})
1252
class ClientDBus(Client, DBusObjectWithProperties):
1253
"""A Client class using D-Bus
1254
1255
Attributes:
1256
dbus_object_path: dbus.ObjectPath
1257
bus: dbus.SystemBus()
1258
"""
1259
1260
runtime_expansions = (Client.runtime_expansions
1261
+ ("dbus_object_path", ))
1262
1263
_interface = "se.recompile.Mandos.Client"
1264
1265
# dbus.service.Object doesn't use super(), so we can't either.
1266
1267
def __init__(self, bus = None, *args, **kwargs):
1268
self.bus = bus
1269
Client.__init__(self, *args, **kwargs)
1270
# Only now, when this client is initialized, can it show up on
1271
# the D-Bus
1272
client_object_name = str(self.name).translate(
1273
{ord("."): ord("_"),
1274
ord("-"): ord("_")})
1275
self.dbus_object_path = dbus.ObjectPath(
1276
"/clients/" + client_object_name)
1277
DBusObjectWithProperties.__init__(self, self.bus,
1278
self.dbus_object_path)
1279
1280
def notifychangeproperty(transform_func, dbus_name,
1281
type_func=lambda x: x,
1282
variant_level=1,
1283
invalidate_only=False,
1284
_interface=_interface):
1285
""" Modify a variable so that it's a property which announces
1286
its changes to DBus.
1287
1288
transform_fun: Function that takes a value and a variant_level
1289
and transforms it to a D-Bus type.
1290
dbus_name: D-Bus name of the variable
1291
type_func: Function that transform the value before sending it
1292
to the D-Bus. Default: no transform
1293
variant_level: D-Bus variant level. Default: 1
1294
"""
1295
attrname = "_{}".format(dbus_name)
1296
1297
def setter(self, value):
1298
if hasattr(self, "dbus_object_path"):
1299
if (not hasattr(self, attrname) or
1300
type_func(getattr(self, attrname, None))
1301
!= type_func(value)):
1302
if invalidate_only:
1303
self.PropertiesChanged(
1304
_interface, dbus.Dictionary(),
1305
dbus.Array((dbus_name, )))
1306
else:
1307
dbus_value = transform_func(
1308
type_func(value),
1309
variant_level = variant_level)
1310
self.PropertyChanged(dbus.String(dbus_name),
1311
dbus_value)
1312
self.PropertiesChanged(
1313
_interface,
1314
dbus.Dictionary({ dbus.String(dbus_name):
1315
dbus_value }),
1316
dbus.Array())
1317
setattr(self, attrname, value)
1318
1319
return property(lambda self: getattr(self, attrname), setter)
1320
1321
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1322
approvals_pending = notifychangeproperty(dbus.Boolean,
1323
"ApprovalPending",
1324
type_func = bool)
1325
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1326
last_enabled = notifychangeproperty(datetime_to_dbus,
1327
"LastEnabled")
1328
checker = notifychangeproperty(
1329
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
1331
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1332
"LastCheckedOK")
1333
last_checker_status = notifychangeproperty(dbus.Int16,
1334
"LastCheckerStatus")
1335
last_approval_request = notifychangeproperty(
1336
datetime_to_dbus, "LastApprovalRequest")
1337
approved_by_default = notifychangeproperty(dbus.Boolean,
1338
"ApprovedByDefault")
1339
approval_delay = notifychangeproperty(
1340
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
1342
approval_duration = notifychangeproperty(
1343
dbus.UInt64, "ApprovalDuration",
1344
type_func = lambda td: td.total_seconds() * 1000)
1345
host = notifychangeproperty(dbus.String, "Host")
1346
timeout = notifychangeproperty(
1347
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
1349
extended_timeout = notifychangeproperty(
1350
dbus.UInt64, "ExtendedTimeout",
1351
type_func = lambda td: td.total_seconds() * 1000)
1352
interval = notifychangeproperty(
1353
dbus.UInt64, "Interval",
1354
type_func = lambda td: td.total_seconds() * 1000)
1355
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
invalidate_only=True)
1358
1359
del notifychangeproperty
1360
1361
def __del__(self, *args, **kwargs):
1362
try:
1363
self.remove_from_connection()
1364
except LookupError:
1365
pass
1366
if hasattr(DBusObjectWithProperties, "__del__"):
1367
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1368
Client.__del__(self, *args, **kwargs)
1369
1370
def checker_callback(self, source, condition,
1371
connection, command, *args, **kwargs):
1372
ret = Client.checker_callback(self, source, condition,
1373
connection, command, *args,
1374
**kwargs)
1375
exitstatus = self.last_checker_status
1376
if exitstatus >= 0:
1377
# Emit D-Bus signal
1378
self.CheckerCompleted(dbus.Int16(exitstatus),
1379
dbus.Int64(0),
1380
dbus.String(command))
1381
else:
1382
# Emit D-Bus signal
1383
self.CheckerCompleted(dbus.Int16(-1),
1384
dbus.Int64(
1385
self.last_checker_signal),
1386
dbus.String(command))
1387
return ret
1388
1389
def start_checker(self, *args, **kwargs):
1390
old_checker_pid = getattr(self.checker, "pid", None)
1391
r = Client.start_checker(self, *args, **kwargs)
1392
# Only if new checker process was started
1393
if (self.checker is not None
1394
and old_checker_pid != self.checker.pid):
1395
# Emit D-Bus signal
1396
self.CheckerStarted(self.current_checker_command)
1397
return r
1398
1399
def _reset_approved(self):
1400
self.approved = None
1401
return False
1402
1403
def approve(self, value=True):
1404
self.approved = value
1405
gobject.timeout_add(int(self.approval_duration.total_seconds()
1406
* 1000), self._reset_approved)
1407
self.send_changedstate()
1408
1409
## D-Bus methods, signals & properties
1410
1411
## Interfaces
1412
1413
## Signals
1414
1415
# CheckerCompleted - signal
1416
@dbus.service.signal(_interface, signature="nxs")
1417
def CheckerCompleted(self, exitcode, waitstatus, command):
1418
"D-Bus signal"
1419
pass
1420
1421
# CheckerStarted - signal
1422
@dbus.service.signal(_interface, signature="s")
1423
def CheckerStarted(self, command):
1424
"D-Bus signal"
1425
pass
1426
1427
# PropertyChanged - signal
1428
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1429
@dbus.service.signal(_interface, signature="sv")
1430
def PropertyChanged(self, property, value):
1431
"D-Bus signal"
1432
pass
1433
1434
# GotSecret - signal
1435
@dbus.service.signal(_interface)
1436
def GotSecret(self):
1437
"""D-Bus signal
1438
Is sent after a successful transfer of secret from the Mandos
1439
server to mandos-client
1440
"""
1441
pass
1442
1443
# Rejected - signal
1444
@dbus.service.signal(_interface, signature="s")
1445
def Rejected(self, reason):
1446
"D-Bus signal"
1447
pass
1448
1449
# NeedApproval - signal
1450
@dbus.service.signal(_interface, signature="tb")
1451
def NeedApproval(self, timeout, default):
1452
"D-Bus signal"
1453
return self.need_approval()
1454
1455
## Methods
1456
1457
# Approve - method
1458
@dbus.service.method(_interface, in_signature="b")
1459
def Approve(self, value):
1460
self.approve(value)
1461
1462
# CheckedOK - method
1463
@dbus.service.method(_interface)
1464
def CheckedOK(self):
1465
self.checked_ok()
1466
1467
# Enable - method
1468
@dbus.service.method(_interface)
1469
def Enable(self):
1470
"D-Bus method"
1471
self.enable()
1472
1473
# StartChecker - method
1474
@dbus.service.method(_interface)
1475
def StartChecker(self):
1476
"D-Bus method"
1477
self.start_checker()
1478
1479
# Disable - method
1480
@dbus.service.method(_interface)
1481
def Disable(self):
1482
"D-Bus method"
1483
self.disable()
1484
1485
# StopChecker - method
1486
@dbus.service.method(_interface)
1487
def StopChecker(self):
1488
self.stop_checker()
1489
1490
## Properties
1491
1492
# ApprovalPending - property
1493
@dbus_service_property(_interface, signature="b", access="read")
1494
def ApprovalPending_dbus_property(self):
1495
return dbus.Boolean(bool(self.approvals_pending))
1496
1497
# ApprovedByDefault - property
1498
@dbus_service_property(_interface,
1499
signature="b",
1500
access="readwrite")
1501
def ApprovedByDefault_dbus_property(self, value=None):
1502
if value is None: # get
1503
return dbus.Boolean(self.approved_by_default)
1504
self.approved_by_default = bool(value)
1505
1506
# ApprovalDelay - property
1507
@dbus_service_property(_interface,
1508
signature="t",
1509
access="readwrite")
1510
def ApprovalDelay_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.UInt64(self.approval_delay.total_seconds()
1513
* 1000)
1514
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1515
1516
# ApprovalDuration - property
1517
@dbus_service_property(_interface,
1518
signature="t",
1519
access="readwrite")
1520
def ApprovalDuration_dbus_property(self, value=None):
1521
if value is None: # get
1522
return dbus.UInt64(self.approval_duration.total_seconds()
1523
* 1000)
1524
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1525
1526
# Name - property
1527
@dbus_annotations(
1528
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1529
@dbus_service_property(_interface, signature="s", access="read")
1530
def Name_dbus_property(self):
1531
return dbus.String(self.name)
1532
1533
# Fingerprint - property
1534
@dbus_annotations(
1535
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1536
@dbus_service_property(_interface, signature="s", access="read")
1537
def Fingerprint_dbus_property(self):
1538
return dbus.String(self.fingerprint)
1539
1540
# Host - property
1541
@dbus_service_property(_interface,
1542
signature="s",
1543
access="readwrite")
1544
def Host_dbus_property(self, value=None):
1545
if value is None: # get
1546
return dbus.String(self.host)
1547
self.host = str(value)
1548
1549
# Created - property
1550
@dbus_annotations(
1551
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def Created_dbus_property(self):
1554
return datetime_to_dbus(self.created)
1555
1556
# LastEnabled - property
1557
@dbus_service_property(_interface, signature="s", access="read")
1558
def LastEnabled_dbus_property(self):
1559
return datetime_to_dbus(self.last_enabled)
1560
1561
# Enabled - property
1562
@dbus_service_property(_interface,
1563
signature="b",
1564
access="readwrite")
1565
def Enabled_dbus_property(self, value=None):
1566
if value is None: # get
1567
return dbus.Boolean(self.enabled)
1568
if value:
1569
self.enable()
1570
else:
1571
self.disable()
1572
1573
# LastCheckedOK - property
1574
@dbus_service_property(_interface,
1575
signature="s",
1576
access="readwrite")
1577
def LastCheckedOK_dbus_property(self, value=None):
1578
if value is not None:
1579
self.checked_ok()
1580
return
1581
return datetime_to_dbus(self.last_checked_ok)
1582
1583
# LastCheckerStatus - property
1584
@dbus_service_property(_interface, signature="n", access="read")
1585
def LastCheckerStatus_dbus_property(self):
1586
return dbus.Int16(self.last_checker_status)
1587
1588
# Expires - property
1589
@dbus_service_property(_interface, signature="s", access="read")
1590
def Expires_dbus_property(self):
1591
return datetime_to_dbus(self.expires)
1592
1593
# LastApprovalRequest - property
1594
@dbus_service_property(_interface, signature="s", access="read")
1595
def LastApprovalRequest_dbus_property(self):
1596
return datetime_to_dbus(self.last_approval_request)
1597
1598
# Timeout - property
1599
@dbus_service_property(_interface,
1600
signature="t",
1601
access="readwrite")
1602
def Timeout_dbus_property(self, value=None):
1603
if value is None: # get
1604
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1605
old_timeout = self.timeout
1606
self.timeout = datetime.timedelta(0, 0, 0, value)
1607
# Reschedule disabling
1608
if self.enabled:
1609
now = datetime.datetime.utcnow()
1610
self.expires += self.timeout - old_timeout
1611
if self.expires <= now:
1612
# The timeout has passed
1613
self.disable()
1614
else:
1615
if (getattr(self, "disable_initiator_tag", None)
1616
is None):
1617
return
1618
gobject.source_remove(self.disable_initiator_tag)
1619
self.disable_initiator_tag = gobject.timeout_add(
1620
int((self.expires - now).total_seconds() * 1000),
1621
self.disable)
1622
1623
# ExtendedTimeout - property
1624
@dbus_service_property(_interface,
1625
signature="t",
1626
access="readwrite")
1627
def ExtendedTimeout_dbus_property(self, value=None):
1628
if value is None: # get
1629
return dbus.UInt64(self.extended_timeout.total_seconds()
1630
* 1000)
1631
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1632
1633
# Interval - property
1634
@dbus_service_property(_interface,
1635
signature="t",
1636
access="readwrite")
1637
def Interval_dbus_property(self, value=None):
1638
if value is None: # get
1639
return dbus.UInt64(self.interval.total_seconds() * 1000)
1640
self.interval = datetime.timedelta(0, 0, 0, value)
1641
if getattr(self, "checker_initiator_tag", None) is None:
1642
return
1643
if self.enabled:
1644
# Reschedule checker run
1645
gobject.source_remove(self.checker_initiator_tag)
1646
self.checker_initiator_tag = gobject.timeout_add(
1647
value, self.start_checker)
1648
self.start_checker() # Start one now, too
1649
1650
# Checker - property
1651
@dbus_service_property(_interface,
1652
signature="s",
1653
access="readwrite")
1654
def Checker_dbus_property(self, value=None):
1655
if value is None: # get
1656
return dbus.String(self.checker_command)
1657
self.checker_command = str(value)
1658
1659
# CheckerRunning - property
1660
@dbus_service_property(_interface,
1661
signature="b",
1662
access="readwrite")
1663
def CheckerRunning_dbus_property(self, value=None):
1664
if value is None: # get
1665
return dbus.Boolean(self.checker is not None)
1666
if value:
1667
self.start_checker()
1668
else:
1669
self.stop_checker()
1670
1671
# ObjectPath - property
1672
@dbus_annotations(
1673
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1674
@dbus_service_property(_interface, signature="o", access="read")
1675
def ObjectPath_dbus_property(self):
1676
return self.dbus_object_path # is already a dbus.ObjectPath
1677
1678
# Secret = property
1679
@dbus_annotations(
1680
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
1681
"invalidates"})
1682
@dbus_service_property(_interface,
1683
signature="ay",
1684
access="write",
1685
byte_arrays=True)
1686
def Secret_dbus_property(self, value):
1687
self.secret = bytes(value)
1688
1689
del _interface
1690
1691
1692
class ProxyClient(object):
1693
def __init__(self, child_pipe, fpr, address):
1694
self._pipe = child_pipe
1695
self._pipe.send(('init', fpr, address))
1696
if not self._pipe.recv():
1697
raise KeyError(fpr)
1698
1699
def __getattribute__(self, name):
1700
if name == '_pipe':
1701
return super(ProxyClient, self).__getattribute__(name)
1702
self._pipe.send(('getattr', name))
1703
data = self._pipe.recv()
1704
if data[0] == 'data':
1705
return data[1]
1706
if data[0] == 'function':
1707
1708
def func(*args, **kwargs):
1709
self._pipe.send(('funcall', name, args, kwargs))
1710
return self._pipe.recv()[1]
1711
1712
return func
1713
1714
def __setattr__(self, name, value):
1715
if name == '_pipe':
1716
return super(ProxyClient, self).__setattr__(name, value)
1717
self._pipe.send(('setattr', name, value))
1718
1719
1720
class ClientHandler(socketserver.BaseRequestHandler, object):
1721
"""A class to handle client connections.
1722
1723
Instantiated once for each connection to handle it.
446
1724
Note: This will run in its own forked process."""
447
1725
448
1726
def handle(self):
449
logger.info(u"TCP connection from: %s",
450
unicode(self.client_address))
451
session = gnutls.connection.ClientSession\
452
(self.request, gnutls.connection.X509Credentials())
453
454
line = self.request.makefile().readline()
455
logger.debug(u"Protocol version: %r", line)
456
try:
457
if int(line.strip().split()[0]) > 1:
458
raise RuntimeError
459
except (ValueError, IndexError, RuntimeError), error:
460
logger.error(u"Unknown protocol version: %s", error)
461
return
462
463
# Note: gnutls.connection.X509Credentials is really a generic
464
# GnuTLS certificate credentials object so long as no X.509
465
# keys are added to it. Therefore, we can use it here despite
466
# using OpenPGP certificates.
467
468
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
469
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
470
# "+DHE-DSS"))
471
priority = "NORMAL" # Fallback default, since this
472
# MUST be set.
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
475
gnutls.library.functions.gnutls_priority_set_direct\
476
(session._c_object, priority, None)
477
478
try:
479
session.handshake()
480
except gnutls.errors.GNUTLSError, error:
481
logger.warning(u"Handshake failed: %s", error)
482
# Do not run session.bye() here: the session is not
483
# established. Just abandon the request.
484
return
485
try:
486
fpr = fingerprint(peer_certificate(session))
487
except (TypeError, gnutls.errors.GNUTLSError), error:
488
logger.warning(u"Bad certificate: %s", error)
489
session.bye()
490
return
491
logger.debug(u"Fingerprint: %s", fpr)
492
client = None
493
for c in self.server.clients:
494
if c.fingerprint == fpr:
495
client = c
496
break
497
if not client:
498
logger.warning(u"Client not found for fingerprint: %s",
499
fpr)
500
session.bye()
501
return
502
# Have to check if client.still_valid(), since it is possible
503
# that the client timed out while establishing the GnuTLS
504
# session.
505
if not client.still_valid():
506
logger.warning(u"Client %(name)s is invalid",
507
vars(client))
508
session.bye()
509
return
510
sent_size = 0
511
while sent_size < len(client.secret):
512
sent = session.send(client.secret[sent_size:])
513
logger.debug(u"Sent: %d, remaining: %d",
514
sent, len(client.secret)
515
- (sent_size + sent))
516
sent_size += sent
517
session.bye()
518
519
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1727
with contextlib.closing(self.server.child_pipe) as child_pipe:
1728
logger.info("TCP connection from: %s",
1729
str(self.client_address))
1730
logger.debug("Pipe FD: %d",
1731
self.server.child_pipe.fileno())
1732
1733
session = gnutls.connection.ClientSession(
1734
self.request, gnutls.connection .X509Credentials())
1735
1736
# Note: gnutls.connection.X509Credentials is really a
1737
# generic GnuTLS certificate credentials object so long as
1738
# no X.509 keys are added to it. Therefore, we can use it
1739
# here despite using OpenPGP certificates.
1740
1741
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1742
# "+AES-256-CBC", "+SHA1",
1743
# "+COMP-NULL", "+CTYPE-OPENPGP",
1744
# "+DHE-DSS"))
1745
# Use a fallback default, since this MUST be set.
1746
priority = self.server.gnutls_priority
1747
if priority is None:
1748
priority = "NORMAL"
1749
gnutls.library.functions.gnutls_priority_set_direct(
1750
session._c_object, priority, None)
1751
1752
# Start communication using the Mandos protocol
1753
# Get protocol number
1754
line = self.request.makefile().readline()
1755
logger.debug("Protocol version: %r", line)
1756
try:
1757
if int(line.strip().split()[0]) > 1:
1758
raise RuntimeError(line)
1759
except (ValueError, IndexError, RuntimeError) as error:
1760
logger.error("Unknown protocol version: %s", error)
1761
return
1762
1763
# Start GnuTLS connection
1764
try:
1765
session.handshake()
1766
except gnutls.errors.GNUTLSError as error:
1767
logger.warning("Handshake failed: %s", error)
1768
# Do not run session.bye() here: the session is not
1769
# established. Just abandon the request.
1770
return
1771
logger.debug("Handshake succeeded")
1772
1773
approval_required = False
1774
try:
1775
try:
1776
fpr = self.fingerprint(
1777
self.peer_certificate(session))
1778
except (TypeError,
1779
gnutls.errors.GNUTLSError) as error:
1780
logger.warning("Bad certificate: %s", error)
1781
return
1782
logger.debug("Fingerprint: %s", fpr)
1783
1784
try:
1785
client = ProxyClient(child_pipe, fpr,
1786
self.client_address)
1787
except KeyError:
1788
return
1789
1790
if client.approval_delay:
1791
delay = client.approval_delay
1792
client.approvals_pending += 1
1793
approval_required = True
1794
1795
while True:
1796
if not client.enabled:
1797
logger.info("Client %s is disabled",
1798
client.name)
1799
if self.server.use_dbus:
1800
# Emit D-Bus signal
1801
client.Rejected("Disabled")
1802
return
1803
1804
if client.approved or not client.approval_delay:
1805
#We are approved or approval is disabled
1806
break
1807
elif client.approved is None:
1808
logger.info("Client %s needs approval",
1809
client.name)
1810
if self.server.use_dbus:
1811
# Emit D-Bus signal
1812
client.NeedApproval(
1813
client.approval_delay.total_seconds()
1814
* 1000, client.approved_by_default)
1815
else:
1816
logger.warning("Client %s was not approved",
1817
client.name)
1818
if self.server.use_dbus:
1819
# Emit D-Bus signal
1820
client.Rejected("Denied")
1821
return
1822
1823
#wait until timeout or approved
1824
time = datetime.datetime.now()
1825
client.changedstate.acquire()
1826
client.changedstate.wait(delay.total_seconds())
1827
client.changedstate.release()
1828
time2 = datetime.datetime.now()
1829
if (time2 - time) >= delay:
1830
if not client.approved_by_default:
1831
logger.warning("Client %s timed out while"
1832
" waiting for approval",
1833
client.name)
1834
if self.server.use_dbus:
1835
# Emit D-Bus signal
1836
client.Rejected("Approval timed out")
1837
return
1838
else:
1839
break
1840
else:
1841
delay -= time2 - time
1842
1843
sent_size = 0
1844
while sent_size < len(client.secret):
1845
try:
1846
sent = session.send(client.secret[sent_size:])
1847
except gnutls.errors.GNUTLSError as error:
1848
logger.warning("gnutls send failed",
1849
exc_info=error)
1850
return
1851
logger.debug("Sent: %d, remaining: %d", sent,
1852
len(client.secret) - (sent_size
1853
+ sent))
1854
sent_size += sent
1855
1856
logger.info("Sending secret to %s", client.name)
1857
# bump the timeout using extended_timeout
1858
client.bump_timeout(client.extended_timeout)
1859
if self.server.use_dbus:
1860
# Emit D-Bus signal
1861
client.GotSecret()
1862
1863
finally:
1864
if approval_required:
1865
client.approvals_pending -= 1
1866
try:
1867
session.bye()
1868
except gnutls.errors.GNUTLSError as error:
1869
logger.warning("GnuTLS bye failed",
1870
exc_info=error)
1871
1872
@staticmethod
1873
def peer_certificate(session):
1874
"Return the peer's OpenPGP certificate as a bytestring"
1875
# If not an OpenPGP certificate...
1876
if (gnutls.library.functions.gnutls_certificate_type_get(
1877
session._c_object)
1878
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1879
# ...do the normal thing
1880
return session.peer_certificate
1881
list_size = ctypes.c_uint(1)
1882
cert_list = (gnutls.library.functions
1883
.gnutls_certificate_get_peers
1884
(session._c_object, ctypes.byref(list_size)))
1885
if not bool(cert_list) and list_size.value != 0:
1886
raise gnutls.errors.GNUTLSError("error getting peer"
1887
" certificate")
1888
if list_size.value == 0:
1889
return None
1890
cert = cert_list[0]
1891
return ctypes.string_at(cert.data, cert.size)
1892
1893
@staticmethod
1894
def fingerprint(openpgp):
1895
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1896
# New GnuTLS "datum" with the OpenPGP public key
1897
datum = gnutls.library.types.gnutls_datum_t(
1898
ctypes.cast(ctypes.c_char_p(openpgp),
1899
ctypes.POINTER(ctypes.c_ubyte)),
1900
ctypes.c_uint(len(openpgp)))
1901
# New empty GnuTLS certificate
1902
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1903
gnutls.library.functions.gnutls_openpgp_crt_init(
1904
ctypes.byref(crt))
1905
# Import the OpenPGP public key into the certificate
1906
gnutls.library.functions.gnutls_openpgp_crt_import(
1907
crt, ctypes.byref(datum),
1908
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1909
# Verify the self signature in the key
1910
crtverify = ctypes.c_uint()
1911
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1912
crt, 0, ctypes.byref(crtverify))
1913
if crtverify.value != 0:
1914
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1915
raise gnutls.errors.CertificateSecurityError(
1916
"Verify failed")
1917
# New buffer for the fingerprint
1918
buf = ctypes.create_string_buffer(20)
1919
buf_len = ctypes.c_size_t()
1920
# Get the fingerprint from the certificate into the buffer
1921
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1922
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1923
# Deinit the certificate
1924
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1925
# Convert the buffer to a Python bytestring
1926
fpr = ctypes.string_at(buf, buf_len.value)
1927
# Convert the bytestring to hexadecimal notation
1928
hex_fpr = binascii.hexlify(fpr).upper()
1929
return hex_fpr
1930
1931
1932
class MultiprocessingMixIn(object):
1933
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1934
1935
def sub_process_main(self, request, address):
1936
try:
1937
self.finish_request(request, address)
1938
except Exception:
1939
self.handle_error(request, address)
1940
self.close_request(request)
1941
1942
def process_request(self, request, address):
1943
"""Start a new process to process the request."""
1944
proc = multiprocessing.Process(target = self.sub_process_main,
1945
args = (request, address))
1946
proc.start()
1947
return proc
1948
1949
1950
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1951
""" adds a pipe to the MixIn """
1952
1953
def process_request(self, request, client_address):
1954
"""Overrides and wraps the original process_request().
1955
1956
This function creates a new pipe in self.pipe
1957
"""
1958
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1959
1960
proc = MultiprocessingMixIn.process_request(self, request,
1961
client_address)
1962
self.child_pipe.close()
1963
self.add_pipe(parent_pipe, proc)
1964
1965
def add_pipe(self, parent_pipe, proc):
1966
"""Dummy function; override as necessary"""
1967
raise NotImplementedError()
1968
1969
1970
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1971
socketserver.TCPServer, object):
1972
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1973
522
1974
Attributes:
523
settings: Server settings
524
clients: Set() of Client objects
525
1975
enabled: Boolean; whether this server is activated yet
1976
interface: None or a network interface name (string)
1977
use_ipv6: Boolean; to use IPv6 or not
526
1978
"""
527
address_family = socket.AF_INET6
528
def __init__(self, *args, **kwargs):
529
if "settings" in kwargs:
530
self.settings = kwargs["settings"]
531
del kwargs["settings"]
532
if "clients" in kwargs:
533
self.clients = kwargs["clients"]
534
del kwargs["clients"]
535
self.enabled = False
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1979
1980
def __init__(self, server_address, RequestHandlerClass,
1981
interface=None,
1982
use_ipv6=True,
1983
socketfd=None):
1984
"""If socketfd is set, use that file descriptor instead of
1985
creating a new one with socket.socket().
1986
"""
1987
self.interface = interface
1988
if use_ipv6:
1989
self.address_family = socket.AF_INET6
1990
if socketfd is not None:
1991
# Save the file descriptor
1992
self.socketfd = socketfd
1993
# Save the original socket.socket() function
1994
self.socket_socket = socket.socket
1995
# To implement --socket, we monkey patch socket.socket.
1996
#
1997
# (When socketserver.TCPServer is a new-style class, we
1998
# could make self.socket into a property instead of monkey
1999
# patching socket.socket.)
2000
#
2001
# Create a one-time-only replacement for socket.socket()
2002
@functools.wraps(socket.socket)
2003
def socket_wrapper(*args, **kwargs):
2004
# Restore original function so subsequent calls are
2005
# not affected.
2006
socket.socket = self.socket_socket
2007
del self.socket_socket
2008
# This time only, return a new socket object from the
2009
# saved file descriptor.
2010
return socket.fromfd(self.socketfd, *args, **kwargs)
2011
# Replace socket.socket() function with wrapper
2012
socket.socket = socket_wrapper
2013
# The socketserver.TCPServer.__init__ will call
2014
# socket.socket(), which might be our replacement,
2015
# socket_wrapper(), if socketfd was set.
2016
socketserver.TCPServer.__init__(self, server_address,
2017
RequestHandlerClass)
2018
537
2019
def server_bind(self):
538
2020
"""This overrides the normal server_bind() function
539
2021
to bind to an interface if one was specified, and also NOT to
540
2022
bind to an address or port if they were not specified."""
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
544
try:
545
self.socket.setsockopt(socket.SOL_SOCKET,
546
SO_BINDTODEVICE,
547
self.settings["interface"])
548
except socket.error, error:
549
if error[0] == errno.EPERM:
550
logger.error(u"No permission to"
551
u" bind to interface %s",
552
self.settings["interface"])
553
else:
554
raise error
2023
if self.interface is not None:
2024
if SO_BINDTODEVICE is None:
2025
logger.error("SO_BINDTODEVICE does not exist;"
2026
" cannot bind to interface %s",
2027
self.interface)
2028
else:
2029
try:
2030
self.socket.setsockopt(
2031
socket.SOL_SOCKET, SO_BINDTODEVICE,
2032
(self.interface + "\0").encode("utf-8"))
2033
except socket.error as error:
2034
if error.errno == errno.EPERM:
2035
logger.error("No permission to bind to"
2036
" interface %s", self.interface)
2037
elif error.errno == errno.ENOPROTOOPT:
2038
logger.error("SO_BINDTODEVICE not available;"
2039
" cannot bind to interface %s",
2040
self.interface)
2041
elif error.errno == errno.ENODEV:
2042
logger.error("Interface %s does not exist,"
2043
" cannot bind", self.interface)
2044
else:
2045
raise
555
2046
# Only bind(2) the socket if we really need to.
556
2047
if self.server_address[0] or self.server_address[1]:
557
2048
if not self.server_address[0]:
558
in6addr_any = "::"
559
self.server_address = (in6addr_any,
2049
if self.address_family == socket.AF_INET6:
2050
any_address = "::" # in6addr_any
2051
else:
2052
any_address = "0.0.0.0" # INADDR_ANY
2053
self.server_address = (any_address,
560
2054
self.server_address[1])
561
2055
elif not self.server_address[1]:
562
self.server_address = (self.server_address[0],
563
0)
564
# if self.settings["interface"]:
2056
self.server_address = (self.server_address[0], 0)
2057
# if self.interface:
565
2058
# self.server_address = (self.server_address[0],
566
2059
# 0, # port
567
2060
# 0, # flowinfo
568
2061
# if_nametoindex
569
# (self.settings
570
# ["interface"]))
571
return super(IPv6_TCPServer, self).server_bind()
2062
# (self.interface))
2063
return socketserver.TCPServer.server_bind(self)
2064
2065
2066
class MandosServer(IPv6_TCPServer):
2067
"""Mandos server.
2068
2069
Attributes:
2070
clients: set of Client objects
2071
gnutls_priority GnuTLS priority string
2072
use_dbus: Boolean; to emit D-Bus signals or not
2073
2074
Assumes a gobject.MainLoop event loop.
2075
"""
2076
2077
def __init__(self, server_address, RequestHandlerClass,
2078
interface=None,
2079
use_ipv6=True,
2080
clients=None,
2081
gnutls_priority=None,
2082
use_dbus=True,
2083
socketfd=None):
2084
self.enabled = False
2085
self.clients = clients
2086
if self.clients is None:
2087
self.clients = {}
2088
self.use_dbus = use_dbus
2089
self.gnutls_priority = gnutls_priority
2090
IPv6_TCPServer.__init__(self, server_address,
2091
RequestHandlerClass,
2092
interface = interface,
2093
use_ipv6 = use_ipv6,
2094
socketfd = socketfd)
2095
572
2096
def server_activate(self):
573
2097
if self.enabled:
574
return super(IPv6_TCPServer, self).server_activate()
2098
return socketserver.TCPServer.server_activate(self)
2099
575
2100
def enable(self):
576
2101
self.enabled = True
2102
2103
def add_pipe(self, parent_pipe, proc):
2104
# Call "handle_ipc" for both data and EOF events
2105
gobject.io_add_watch(
2106
parent_pipe.fileno(),
2107
gobject.IO_IN | gobject.IO_HUP,
2108
functools.partial(self.handle_ipc,
2109
parent_pipe = parent_pipe,
2110
proc = proc))
2111
2112
def handle_ipc(self, source, condition,
2113
parent_pipe=None,
2114
proc = None,
2115
client_object=None):
2116
# error, or the other end of multiprocessing.Pipe has closed
2117
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2118
# Wait for other process to exit
2119
proc.join()
2120
return False
2121
2122
# Read a request from the child
2123
request = parent_pipe.recv()
2124
command = request[0]
2125
2126
if command == 'init':
2127
fpr = request[1]
2128
address = request[2]
2129
2130
for c in self.clients.itervalues():
2131
if c.fingerprint == fpr:
2132
client = c
2133
break
2134
else:
2135
logger.info("Client not found for fingerprint: %s, ad"
2136
"dress: %s", fpr, address)
2137
if self.use_dbus:
2138
# Emit D-Bus signal
2139
mandos_dbus_service.ClientNotFound(fpr,
2140
address[0])
2141
parent_pipe.send(False)
2142
return False
2143
2144
gobject.io_add_watch(
2145
parent_pipe.fileno(),
2146
gobject.IO_IN | gobject.IO_HUP,
2147
functools.partial(self.handle_ipc,
2148
parent_pipe = parent_pipe,
2149
proc = proc,
2150
client_object = client))
2151
parent_pipe.send(True)
2152
# remove the old hook in favor of the new above hook on
2153
# same fileno
2154
return False
2155
if command == 'funcall':
2156
funcname = request[1]
2157
args = request[2]
2158
kwargs = request[3]
2159
2160
parent_pipe.send(('data', getattr(client_object,
2161
funcname)(*args,
2162
**kwargs)))
2163
2164
if command == 'getattr':
2165
attrname = request[1]
2166
if isinstance(client_object.__getattribute__(attrname),
2167
collections.Callable):
2168
parent_pipe.send(('function', ))
2169
else:
2170
parent_pipe.send((
2171
'data', client_object.__getattribute__(attrname)))
2172
2173
if command == 'setattr':
2174
attrname = request[1]
2175
value = request[2]
2176
setattr(client_object, attrname, value)
2177
2178
return True
2179
2180
2181
def rfc3339_duration_to_delta(duration):
2182
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2183
2184
>>> rfc3339_duration_to_delta("P7D")
2185
datetime.timedelta(7)
2186
>>> rfc3339_duration_to_delta("PT60S")
2187
datetime.timedelta(0, 60)
2188
>>> rfc3339_duration_to_delta("PT60M")
2189
datetime.timedelta(0, 3600)
2190
>>> rfc3339_duration_to_delta("PT24H")
2191
datetime.timedelta(1)
2192
>>> rfc3339_duration_to_delta("P1W")
2193
datetime.timedelta(7)
2194
>>> rfc3339_duration_to_delta("PT5M30S")
2195
datetime.timedelta(0, 330)
2196
>>> rfc3339_duration_to_delta("P1DT3M20S")
2197
datetime.timedelta(1, 200)
2198
"""
2199
2200
# Parsing an RFC 3339 duration with regular expressions is not
2201
# possible - there would have to be multiple places for the same
2202
# values, like seconds. The current code, while more esoteric, is
2203
# cleaner without depending on a parsing library. If Python had a
2204
# built-in library for parsing we would use it, but we'd like to
2205
# avoid excessive use of external libraries.
2206
2207
# New type for defining tokens, syntax, and semantics all-in-one
2208
Token = collections.namedtuple("Token", (
2209
"regexp", # To match token; if "value" is not None, must have
2210
# a "group" containing digits
2211
"value", # datetime.timedelta or None
2212
"followers")) # Tokens valid after this token
2213
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2214
# the "duration" ABNF definition in RFC 3339, Appendix A.
2215
token_end = Token(re.compile(r"$"), None, frozenset())
2216
token_second = Token(re.compile(r"(\d+)S"),
2217
datetime.timedelta(seconds=1),
2218
frozenset((token_end, )))
2219
token_minute = Token(re.compile(r"(\d+)M"),
2220
datetime.timedelta(minutes=1),
2221
frozenset((token_second, token_end)))
2222
token_hour = Token(re.compile(r"(\d+)H"),
2223
datetime.timedelta(hours=1),
2224
frozenset((token_minute, token_end)))
2225
token_time = Token(re.compile(r"T"),
2226
None,
2227
frozenset((token_hour, token_minute,
2228
token_second)))
2229
token_day = Token(re.compile(r"(\d+)D"),
2230
datetime.timedelta(days=1),
2231
frozenset((token_time, token_end)))
2232
token_month = Token(re.compile(r"(\d+)M"),
2233
datetime.timedelta(weeks=4),
2234
frozenset((token_day, token_end)))
2235
token_year = Token(re.compile(r"(\d+)Y"),
2236
datetime.timedelta(weeks=52),
2237
frozenset((token_month, token_end)))
2238
token_week = Token(re.compile(r"(\d+)W"),
2239
datetime.timedelta(weeks=1),
2240
frozenset((token_end, )))
2241
token_duration = Token(re.compile(r"P"), None,
2242
frozenset((token_year, token_month,
2243
token_day, token_time,
2244
token_week)))
2245
# Define starting values
2246
value = datetime.timedelta() # Value so far
2247
found_token = None
2248
followers = frozenset((token_duration, )) # Following valid tokens
2249
s = duration # String left to parse
2250
# Loop until end token is found
2251
while found_token is not token_end:
2252
# Search for any currently valid tokens
2253
for token in followers:
2254
match = token.regexp.match(s)
2255
if match is not None:
2256
# Token found
2257
if token.value is not None:
2258
# Value found, parse digits
2259
factor = int(match.group(1), 10)
2260
# Add to value so far
2261
value += factor * token.value
2262
# Strip token from string
2263
s = token.regexp.sub("", s, 1)
2264
# Go to found token
2265
found_token = token
2266
# Set valid next tokens
2267
followers = found_token.followers
2268
break
2269
else:
2270
# No currently valid tokens were found
2271
raise ValueError("Invalid RFC 3339 duration: {!r}"
2272
.format(duration))
2273
# End token found
2274
return value
577
2275
578
2276
579
2277
def string_to_delta(interval):
580
2278
"""Parse a string and return a datetime.timedelta
581
2279
582
2280
>>> string_to_delta('7d')
583
2281
datetime.timedelta(7)
584
2282
>>> string_to_delta('60s')
587
2285
datetime.timedelta(0, 3600)
588
2286
>>> string_to_delta('24h')
589
2287
datetime.timedelta(1)
590
>>> string_to_delta(u'1w')
2288
>>> string_to_delta('1w')
591
2289
datetime.timedelta(7)
592
2290
>>> string_to_delta('5m 30s')
593
2291
datetime.timedelta(0, 330)
594
2292
"""
2293
2294
try:
2295
return rfc3339_duration_to_delta(interval)
2296
except ValueError:
2297
pass
2298
595
2299
timevalue = datetime.timedelta(0)
596
2300
for s in interval.split():
597
2301
try:
598
suffix = unicode(s[-1])
2302
suffix = s[-1]
599
2303
value = int(s[:-1])
600
if suffix == u"d":
2304
if suffix == "d":
601
2305
delta = datetime.timedelta(value)
602
elif suffix == u"s":
2306
elif suffix == "s":
603
2307
delta = datetime.timedelta(0, value)
604
elif suffix == u"m":
2308
elif suffix == "m":
605
2309
delta = datetime.timedelta(0, 0, 0, 0, value)
606
elif suffix == u"h":
2310
elif suffix == "h":
607
2311
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
608
elif suffix == u"w":
2312
elif suffix == "w":
609
2313
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
610
2314
else:
611
raise ValueError
612
except (ValueError, IndexError):
613
raise ValueError
2315
raise ValueError("Unknown suffix {!r}".format(suffix))
2316
except IndexError as e:
2317
raise ValueError(*(e.args))
614
2318
timevalue += delta
615
2319
return timevalue
616
2320
617
2321
618
def server_state_changed(state):
619
"""Derived from the Avahi example code"""
620
if state == avahi.SERVER_COLLISION:
621
logger.error(u"Zeroconf server name collision")
622
service.remove()
623
elif state == avahi.SERVER_RUNNING:
624
service.add()
625
626
627
def entry_group_state_changed(state, error):
628
"""Derived from the Avahi example code"""
629
logger.debug(u"Avahi state change: %i", state)
630
631
if state == avahi.ENTRY_GROUP_ESTABLISHED:
632
logger.debug(u"Zeroconf service established.")
633
elif state == avahi.ENTRY_GROUP_COLLISION:
634
logger.warning(u"Zeroconf service name collision.")
635
service.rename()
636
elif state == avahi.ENTRY_GROUP_FAILURE:
637
logger.critical(u"Avahi: Error in group state changed %s",
638
unicode(error))
639
raise AvahiGroupError("State changed: %s", str(error))
640
641
def if_nametoindex(interface):
642
"""Call the C function if_nametoindex(), or equivalent"""
643
global if_nametoindex
644
try:
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
647
except (OSError, AttributeError):
648
if "struct" not in sys.modules:
649
import struct
650
if "fcntl" not in sys.modules:
651
import fcntl
652
def if_nametoindex(interface):
653
"Get an interface index the hard way, i.e. using fcntl()"
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
655
s = socket.socket()
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
658
s.close()
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
660
return interface_index
661
return if_nametoindex(interface)
662
663
664
2322
def daemon(nochdir = False, noclose = False):
665
2323
"""See daemon(3). Standard BSD Unix function.
2324
666
2325
This should really exist as os.daemon, but it doesn't (yet)."""
667
2326
if os.fork():
668
2327
sys.exit()
673
2332
sys.exit()
674
2333
if not noclose:
675
2334
# Close all standard open file descriptors
676
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2335
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
677
2336
if not stat.S_ISCHR(os.fstat(null).st_mode):
678
2337
raise OSError(errno.ENODEV,
679
"/dev/null not a character device")
2338
"{} not a character device"
2339
.format(os.devnull))
680
2340
os.dup2(null, sys.stdin.fileno())
681
2341
os.dup2(null, sys.stdout.fileno())
682
2342
os.dup2(null, sys.stderr.fileno())
685
2345
686
2346
687
2347
def main():
688
parser = OptionParser(version = "%%prog %s" % version)
689
parser.add_option("-i", "--interface", type="string",
690
metavar="IF", help="Bind to interface IF")
691
parser.add_option("-a", "--address", type="string",
692
help="Address to listen for requests on")
693
parser.add_option("-p", "--port", type="int",
694
help="Port number to receive requests on")
695
parser.add_option("--check", action="store_true", default=False,
696
help="Run self-test")
697
parser.add_option("--debug", action="store_true",
698
help="Debug mode; run in foreground and log to"
699
" terminal")
700
parser.add_option("--priority", type="string", help="GnuTLS"
701
" priority string (see GnuTLS documentation)")
702
parser.add_option("--servicename", type="string", metavar="NAME",
703
help="Zeroconf service name")
704
parser.add_option("--configdir", type="string",
705
default="/etc/mandos", metavar="DIR",
706
help="Directory to search for configuration"
707
" files")
708
options = parser.parse_args()[0]
2348
2349
##################################################################
2350
# Parsing of options, both command line and config file
2351
2352
parser = argparse.ArgumentParser()
2353
parser.add_argument("-v", "--version", action="version",
2354
version = "%(prog)s {}".format(version),
2355
help="show version number and exit")
2356
parser.add_argument("-i", "--interface", metavar="IF",
2357
help="Bind to interface IF")
2358
parser.add_argument("-a", "--address",
2359
help="Address to listen for requests on")
2360
parser.add_argument("-p", "--port", type=int,
2361
help="Port number to receive requests on")
2362
parser.add_argument("--check", action="store_true",
2363
help="Run self-test")
2364
parser.add_argument("--debug", action="store_true",
2365
help="Debug mode; run in foreground and log"
2366
" to terminal", default=None)
2367
parser.add_argument("--debuglevel", metavar="LEVEL",
2368
help="Debug level for stdout output")
2369
parser.add_argument("--priority", help="GnuTLS"
2370
" priority string (see GnuTLS documentation)")
2371
parser.add_argument("--servicename",
2372
metavar="NAME", help="Zeroconf service name")
2373
parser.add_argument("--configdir",
2374
default="/etc/mandos", metavar="DIR",
2375
help="Directory to search for configuration"
2376
" files")
2377
parser.add_argument("--no-dbus", action="store_false",
2378
dest="use_dbus", help="Do not provide D-Bus"
2379
" system bus interface", default=None)
2380
parser.add_argument("--no-ipv6", action="store_false",
2381
dest="use_ipv6", help="Do not use IPv6",
2382
default=None)
2383
parser.add_argument("--no-restore", action="store_false",
2384
dest="restore", help="Do not restore stored"
2385
" state", default=None)
2386
parser.add_argument("--socket", type=int,
2387
help="Specify a file descriptor to a network"
2388
" socket to use instead of creating one")
2389
parser.add_argument("--statedir", metavar="DIR",
2390
help="Directory to save/restore state in")
2391
parser.add_argument("--foreground", action="store_true",
2392
help="Run in foreground", default=None)
2393
parser.add_argument("--no-zeroconf", action="store_false",
2394
dest="zeroconf", help="Do not use Zeroconf",
2395
default=None)
2396
2397
options = parser.parse_args()
709
2398
710
2399
if options.check:
711
2400
import doctest
712
doctest.testmod()
713
sys.exit()
2401
fail_count, test_count = doctest.testmod()
2402
sys.exit(os.EX_OK if fail_count == 0 else 1)
714
2403
715
2404
# Default values for config file for server-global settings
716
2405
server_defaults = { "interface": "",
718
2407
"port": "",
719
2408
"debug": "False",
720
2409
"priority":
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2410
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2411
":+SIGN-DSA-SHA256",
722
2412
"servicename": "Mandos",
723
}
2413
"use_dbus": "True",
2414
"use_ipv6": "True",
2415
"debuglevel": "",
2416
"restore": "True",
2417
"socket": "",
2418
"statedir": "/var/lib/mandos",
2419
"foreground": "False",
2420
"zeroconf": "True",
2421
}
724
2422
725
2423
# Parse config file for server-global settings
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
2424
server_config = configparser.SafeConfigParser(server_defaults)
727
2425
del server_defaults
728
2426
server_config.read(os.path.join(options.configdir, "mandos.conf"))
729
2427
# Convert the SafeConfigParser object to a dict
730
2428
server_settings = server_config.defaults()
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
733
("DEFAULT", "debug")
2429
# Use the appropriate methods on the non-string config options
2430
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2431
server_settings[option] = server_config.getboolean("DEFAULT",
2432
option)
2433
if server_settings["port"]:
2434
server_settings["port"] = server_config.getint("DEFAULT",
2435
"port")
2436
if server_settings["socket"]:
2437
server_settings["socket"] = server_config.getint("DEFAULT",
2438
"socket")
2439
# Later, stdin will, and stdout and stderr might, be dup'ed
2440
# over with an opened os.devnull. But we don't want this to
2441
# happen with a supplied network socket.
2442
if 0 <= server_settings["socket"] <= 2:
2443
server_settings["socket"] = os.dup(server_settings
2444
["socket"])
734
2445
del server_config
735
2446
736
2447
# Override the settings from the config file with command line
737
2448
# options, if set.
738
2449
for option in ("interface", "address", "port", "debug",
739
"priority", "servicename", "configdir"):
2450
"priority", "servicename", "configdir", "use_dbus",
2451
"use_ipv6", "debuglevel", "restore", "statedir",
2452
"socket", "foreground", "zeroconf"):
740
2453
value = getattr(options, option)
741
2454
if value is not None:
742
2455
server_settings[option] = value
743
2456
del options
2457
# Force all strings to be unicode
2458
for option in server_settings.keys():
2459
if isinstance(server_settings[option], bytes):
2460
server_settings[option] = (server_settings[option]
2461
.decode("utf-8"))
2462
# Force all boolean options to be boolean
2463
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2464
"foreground", "zeroconf"):
2465
server_settings[option] = bool(server_settings[option])
2466
# Debug implies foreground
2467
if server_settings["debug"]:
2468
server_settings["foreground"] = True
744
2469
# Now we have our good server settings in "server_settings"
745
2470
2471
##################################################################
2472
2473
if (not server_settings["zeroconf"]
2474
and not (server_settings["port"]
2475
or server_settings["socket"] != "")):
2476
parser.error("Needs port or socket to work without Zeroconf")
2477
2478
# For convenience
746
2479
debug = server_settings["debug"]
2480
debuglevel = server_settings["debuglevel"]
2481
use_dbus = server_settings["use_dbus"]
2482
use_ipv6 = server_settings["use_ipv6"]
2483
stored_state_path = os.path.join(server_settings["statedir"],
2484
stored_state_file)
2485
foreground = server_settings["foreground"]
2486
zeroconf = server_settings["zeroconf"]
747
2487
748
if not debug:
749
syslogger.setLevel(logging.WARNING)
750
console.setLevel(logging.WARNING)
2488
if debug:
2489
initlogger(debug, logging.DEBUG)
2490
else:
2491
if not debuglevel:
2492
initlogger(debug)
2493
else:
2494
level = getattr(logging, debuglevel.upper())
2495
initlogger(debug, level)
751
2496
752
2497
if server_settings["servicename"] != "Mandos":
753
syslogger.setFormatter(logging.Formatter\
754
('Mandos (%s): %%(levelname)s:'
755
' %%(message)s'
756
% server_settings["servicename"]))
2498
syslogger.setFormatter(
2499
logging.Formatter('Mandos ({}) [%(process)d]:'
2500
' %(levelname)s: %(message)s'.format(
2501
server_settings["servicename"])))
757
2502
758
2503
# Parse config file with clients
759
client_defaults = { "timeout": "1h",
760
"interval": "5m",
761
"checker": "fping -q -- %(host)s",
762
"host": "",
763
}
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
2504
client_config = configparser.SafeConfigParser(Client
2505
.client_defaults)
765
2506
client_config.read(os.path.join(server_settings["configdir"],
766
2507
"clients.conf"))
767
2508
768
clients = Set()
769
tcp_server = IPv6_TCPServer((server_settings["address"],
770
server_settings["port"]),
771
TCP_handler,
772
settings=server_settings,
773
clients=clients)
774
pidfilename = "/var/run/mandos.pid"
775
try:
776
pidfile = open(pidfilename, "w")
777
except IOError, error:
778
logger.error("Could not open file %r", pidfilename)
779
780
uid = 65534
781
gid = 65534
782
try:
783
uid = pwd.getpwnam("mandos").pw_uid
784
except KeyError:
785
try:
786
uid = pwd.getpwnam("nobody").pw_uid
787
except KeyError:
788
pass
789
try:
790
gid = pwd.getpwnam("mandos").pw_gid
791
except KeyError:
792
try:
793
gid = pwd.getpwnam("nogroup").pw_gid
794
except KeyError:
795
pass
796
try:
2509
global mandos_dbus_service
2510
mandos_dbus_service = None
2511
2512
socketfd = None
2513
if server_settings["socket"] != "":
2514
socketfd = server_settings["socket"]
2515
tcp_server = MandosServer(
2516
(server_settings["address"], server_settings["port"]),
2517
ClientHandler,
2518
interface=(server_settings["interface"] or None),
2519
use_ipv6=use_ipv6,
2520
gnutls_priority=server_settings["priority"],
2521
use_dbus=use_dbus,
2522
socketfd=socketfd)
2523
if not foreground:
2524
pidfilename = "/run/mandos.pid"
2525
if not os.path.isdir("/run/."):
2526
pidfilename = "/var/run/mandos.pid"
2527
pidfile = None
2528
try:
2529
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2530
except IOError as e:
2531
logger.error("Could not open file %r", pidfilename,
2532
exc_info=e)
2533
2534
for name in ("_mandos", "mandos", "nobody"):
2535
try:
2536
uid = pwd.getpwnam(name).pw_uid
2537
gid = pwd.getpwnam(name).pw_gid
2538
break
2539
except KeyError:
2540
continue
2541
else:
2542
uid = 65534
2543
gid = 65534
2544
try:
2545
os.setgid(gid)
797
2546
os.setuid(uid)
798
os.setgid(gid)
799
except OSError, error:
800
if error[0] != errno.EPERM:
801
raise error
802
803
global service
804
service = AvahiService(name = server_settings["servicename"],
805
servicetype = "_mandos._tcp", )
806
if server_settings["interface"]:
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
2547
except OSError as error:
2548
if error.errno != errno.EPERM:
2549
raise
2550
2551
if debug:
2552
# Enable all possible GnuTLS debugging
2553
2554
# "Use a log level over 10 to enable all debugging options."
2555
# - GnuTLS manual
2556
gnutls.library.functions.gnutls_global_set_log_level(11)
2557
2558
@gnutls.library.types.gnutls_log_func
2559
def debug_gnutls(level, string):
2560
logger.debug("GnuTLS: %s", string[:-1])
2561
2562
gnutls.library.functions.gnutls_global_set_log_function(
2563
debug_gnutls)
2564
2565
# Redirect stdin so all checkers get /dev/null
2566
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2567
os.dup2(null, sys.stdin.fileno())
2568
if null > 2:
2569
os.close(null)
2570
2571
# Need to fork before connecting to D-Bus
2572
if not foreground:
2573
# Close all input and output, do double fork, etc.
2574
daemon()
2575
2576
# multiprocessing will use threads, so before we use gobject we
2577
# need to inform gobject that threads will be used.
2578
gobject.threads_init()
809
2579
810
2580
global main_loop
811
global bus
812
global server
813
2581
# From the Avahi example code
814
DBusGMainLoop(set_as_default=True )
2582
DBusGMainLoop(set_as_default=True)
815
2583
main_loop = gobject.MainLoop()
816
2584
bus = dbus.SystemBus()
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
820
2585
# End of Avahi example code
821
822
def remove_from_clients(client):
823
clients.remove(client)
824
if not clients:
825
logger.critical(u"No clients left, exiting")
826
sys.exit()
827
828
clients.update(Set(Client(name = section,
829
stop_hook = remove_from_clients,
830
config
831
= dict(client_config.items(section)))
832
for section in client_config.sections()))
833
if not clients:
834
logger.critical(u"No clients defined")
835
sys.exit(1)
836
837
if debug:
838
# Redirect stdin so all checkers get /dev/null
839
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
840
os.dup2(null, sys.stdin.fileno())
841
if null > 2:
842
os.close(null)
843
else:
844
# No console logging
845
logger.removeHandler(console)
846
# Close all input and output, do double fork, etc.
847
daemon()
848
849
try:
850
pid = os.getpid()
851
pidfile.write(str(pid) + "\n")
852
pidfile.close()
2586
if use_dbus:
2587
try:
2588
bus_name = dbus.service.BusName("se.recompile.Mandos",
2589
bus,
2590
do_not_queue=True)
2591
old_bus_name = dbus.service.BusName(
2592
"se.bsnet.fukt.Mandos", bus,
2593
do_not_queue=True)
2594
except dbus.exceptions.DBusException as e:
2595
logger.error("Disabling D-Bus:", exc_info=e)
2596
use_dbus = False
2597
server_settings["use_dbus"] = False
2598
tcp_server.use_dbus = False
2599
if zeroconf:
2600
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2601
service = AvahiServiceToSyslog(
2602
name = server_settings["servicename"],
2603
servicetype = "_mandos._tcp",
2604
protocol = protocol,
2605
bus = bus)
2606
if server_settings["interface"]:
2607
service.interface = if_nametoindex(
2608
server_settings["interface"].encode("utf-8"))
2609
2610
global multiprocessing_manager
2611
multiprocessing_manager = multiprocessing.Manager()
2612
2613
client_class = Client
2614
if use_dbus:
2615
client_class = functools.partial(ClientDBus, bus = bus)
2616
2617
client_settings = Client.config_parser(client_config)
2618
old_client_settings = {}
2619
clients_data = {}
2620
2621
# This is used to redirect stdout and stderr for checker processes
2622
global wnull
2623
wnull = open(os.devnull, "w") # A writable /dev/null
2624
# Only used if server is running in foreground but not in debug
2625
# mode
2626
if debug or not foreground:
2627
wnull.close()
2628
2629
# Get client data and settings from last running state.
2630
if server_settings["restore"]:
2631
try:
2632
with open(stored_state_path, "rb") as stored_state:
2633
clients_data, old_client_settings = pickle.load(
2634
stored_state)
2635
os.remove(stored_state_path)
2636
except IOError as e:
2637
if e.errno == errno.ENOENT:
2638
logger.warning("Could not load persistent state:"
2639
" {}".format(os.strerror(e.errno)))
2640
else:
2641
logger.critical("Could not load persistent state:",
2642
exc_info=e)
2643
raise
2644
except EOFError as e:
2645
logger.warning("Could not load persistent state: "
2646
"EOFError:",
2647
exc_info=e)
2648
2649
with PGPEngine() as pgp:
2650
for client_name, client in clients_data.items():
2651
# Skip removed clients
2652
if client_name not in client_settings:
2653
continue
2654
2655
# Decide which value to use after restoring saved state.
2656
# We have three different values: Old config file,
2657
# new config file, and saved state.
2658
# New config value takes precedence if it differs from old
2659
# config value, otherwise use saved state.
2660
for name, value in client_settings[client_name].items():
2661
try:
2662
# For each value in new config, check if it
2663
# differs from the old config value (Except for
2664
# the "secret" attribute)
2665
if (name != "secret"
2666
and (value !=
2667
old_client_settings[client_name][name])):
2668
client[name] = value
2669
except KeyError:
2670
pass
2671
2672
# Clients who has passed its expire date can still be
2673
# enabled if its last checker was successful. A Client
2674
# whose checker succeeded before we stored its state is
2675
# assumed to have successfully run all checkers during
2676
# downtime.
2677
if client["enabled"]:
2678
if datetime.datetime.utcnow() >= client["expires"]:
2679
if not client["last_checked_ok"]:
2680
logger.warning(
2681
"disabling client {} - Client never "
2682
"performed a successful checker".format(
2683
client_name))
2684
client["enabled"] = False
2685
elif client["last_checker_status"] != 0:
2686
logger.warning(
2687
"disabling client {} - Client last"
2688
" checker failed with error code"
2689
" {}".format(
2690
client_name,
2691
client["last_checker_status"]))
2692
client["enabled"] = False
2693
else:
2694
client["expires"] = (
2695
datetime.datetime.utcnow()
2696
+ client["timeout"])
2697
logger.debug("Last checker succeeded,"
2698
" keeping {} enabled".format(
2699
client_name))
2700
try:
2701
client["secret"] = pgp.decrypt(
2702
client["encrypted_secret"],
2703
client_settings[client_name]["secret"])
2704
except PGPError:
2705
# If decryption fails, we use secret from new settings
2706
logger.debug("Failed to decrypt {} old secret".format(
2707
client_name))
2708
client["secret"] = (client_settings[client_name]
2709
["secret"])
2710
2711
# Add/remove clients based on new changes made to config
2712
for client_name in (set(old_client_settings)
2713
- set(client_settings)):
2714
del clients_data[client_name]
2715
for client_name in (set(client_settings)
2716
- set(old_client_settings)):
2717
clients_data[client_name] = client_settings[client_name]
2718
2719
# Create all client objects
2720
for client_name, client in clients_data.items():
2721
tcp_server.clients[client_name] = client_class(
2722
name = client_name,
2723
settings = client,
2724
server_settings = server_settings)
2725
2726
if not tcp_server.clients:
2727
logger.warning("No clients defined")
2728
2729
if not foreground:
2730
if pidfile is not None:
2731
pid = os.getpid()
2732
try:
2733
with pidfile:
2734
print(pid, file=pidfile)
2735
except IOError:
2736
logger.error("Could not write to file %r with PID %d",
2737
pidfilename, pid)
853
2738
del pidfile
854
except IOError:
855
logger.error(u"Could not write to file %r with PID %d",
856
pidfilename, pid)
857
except NameError:
858
# "pidfile" was never created
859
pass
860
del pidfilename
2739
del pidfilename
2740
2741
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2742
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2743
2744
if use_dbus:
2745
2746
@alternate_dbus_interfaces(
2747
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2748
class MandosDBusService(DBusObjectWithProperties):
2749
"""A D-Bus proxy object"""
2750
2751
def __init__(self):
2752
dbus.service.Object.__init__(self, bus, "/")
2753
2754
_interface = "se.recompile.Mandos"
2755
2756
@dbus_interface_annotations(_interface)
2757
def _foo(self):
2758
return {
2759
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2760
"false" }
2761
2762
@dbus.service.signal(_interface, signature="o")
2763
def ClientAdded(self, objpath):
2764
"D-Bus signal"
2765
pass
2766
2767
@dbus.service.signal(_interface, signature="ss")
2768
def ClientNotFound(self, fingerprint, address):
2769
"D-Bus signal"
2770
pass
2771
2772
@dbus.service.signal(_interface, signature="os")
2773
def ClientRemoved(self, objpath, name):
2774
"D-Bus signal"
2775
pass
2776
2777
@dbus.service.method(_interface, out_signature="ao")
2778
def GetAllClients(self):
2779
"D-Bus method"
2780
return dbus.Array(c.dbus_object_path for c in
2781
tcp_server.clients.itervalues())
2782
2783
@dbus.service.method(_interface,
2784
out_signature="a{oa{sv}}")
2785
def GetAllClientsWithProperties(self):
2786
"D-Bus method"
2787
return dbus.Dictionary(
2788
{ c.dbus_object_path: c.GetAll("")
2789
for c in tcp_server.clients.itervalues() },
2790
signature="oa{sv}")
2791
2792
@dbus.service.method(_interface, in_signature="o")
2793
def RemoveClient(self, object_path):
2794
"D-Bus method"
2795
for c in tcp_server.clients.itervalues():
2796
if c.dbus_object_path == object_path:
2797
del tcp_server.clients[c.name]
2798
c.remove_from_connection()
2799
# Don't signal anything except ClientRemoved
2800
c.disable(quiet=True)
2801
# Emit D-Bus signal
2802
self.ClientRemoved(object_path, c.name)
2803
return
2804
raise KeyError(object_path)
2805
2806
del _interface
2807
2808
mandos_dbus_service = MandosDBusService()
861
2809
862
2810
def cleanup():
863
2811
"Cleanup function; run on exit"
864
global group
865
# From the Avahi example code
866
if not group is None:
867
group.Free()
868
group = None
869
# End of Avahi example code
870
871
while clients:
872
client = clients.pop()
873
client.stop_hook = None
874
client.stop()
2812
if zeroconf:
2813
service.cleanup()
2814
2815
multiprocessing.active_children()
2816
wnull.close()
2817
if not (tcp_server.clients or client_settings):
2818
return
2819
2820
# Store client before exiting. Secrets are encrypted with key
2821
# based on what config file has. If config file is
2822
# removed/edited, old secret will thus be unrecovable.
2823
clients = {}
2824
with PGPEngine() as pgp:
2825
for client in tcp_server.clients.itervalues():
2826
key = client_settings[client.name]["secret"]
2827
client.encrypted_secret = pgp.encrypt(client.secret,
2828
key)
2829
client_dict = {}
2830
2831
# A list of attributes that can not be pickled
2832
# + secret.
2833
exclude = { "bus", "changedstate", "secret",
2834
"checker", "server_settings" }
2835
for name, typ in inspect.getmembers(dbus.service
2836
.Object):
2837
exclude.add(name)
2838
2839
client_dict["encrypted_secret"] = (client
2840
.encrypted_secret)
2841
for attr in client.client_structure:
2842
if attr not in exclude:
2843
client_dict[attr] = getattr(client, attr)
2844
2845
clients[client.name] = client_dict
2846
del client_settings[client.name]["secret"]
2847
2848
try:
2849
with tempfile.NamedTemporaryFile(
2850
mode='wb',
2851
suffix=".pickle",
2852
prefix='clients-',
2853
dir=os.path.dirname(stored_state_path),
2854
delete=False) as stored_state:
2855
pickle.dump((clients, client_settings), stored_state)
2856
tempname = stored_state.name
2857
os.rename(tempname, stored_state_path)
2858
except (IOError, OSError) as e:
2859
if not debug:
2860
try:
2861
os.remove(tempname)
2862
except NameError:
2863
pass
2864
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2865
logger.warning("Could not save persistent state: {}"
2866
.format(os.strerror(e.errno)))
2867
else:
2868
logger.warning("Could not save persistent state:",
2869
exc_info=e)
2870
raise
2871
2872
# Delete all clients, and settings from config
2873
while tcp_server.clients:
2874
name, client = tcp_server.clients.popitem()
2875
if use_dbus:
2876
client.remove_from_connection()
2877
# Don't signal anything except ClientRemoved
2878
client.disable(quiet=True)
2879
if use_dbus:
2880
# Emit D-Bus signal
2881
mandos_dbus_service.ClientRemoved(
2882
client.dbus_object_path, client.name)
2883
client_settings.clear()
875
2884
876
2885
atexit.register(cleanup)
877
2886
878
if not debug:
879
signal.signal(signal.SIGINT, signal.SIG_IGN)
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
882
883
for client in clients:
884
client.start()
2887
for client in tcp_server.clients.itervalues():
2888
if use_dbus:
2889
# Emit D-Bus signal
2890
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2891
# Need to initiate checking of clients
2892
if client.enabled:
2893
client.init_checker()
885
2894
886
2895
tcp_server.enable()
887
2896
tcp_server.server_activate()
888
2897
889
2898
# Find out what port we got
890
service.port = tcp_server.socket.getsockname()[1]
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
2899
if zeroconf:
2900
service.port = tcp_server.socket.getsockname()[1]
2901
if use_ipv6:
2902
logger.info("Now listening on address %r, port %d,"
2903
" flowinfo %d, scope_id %d",
2904
*tcp_server.socket.getsockname())
2905
else: # IPv4
2906
logger.info("Now listening on address %r, port %d",
2907
*tcp_server.socket.getsockname())
893
2908
894
2909
#service.interface = tcp_server.socket.getsockname()[3]
895
2910
896
2911
try:
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
899
try:
900
server_state_changed(server.GetState())
901
except dbus.exceptions.DBusException, error:
902
logger.critical(u"DBusException: %s", error)
903
sys.exit(1)
904
# End of Avahi example code
2912
if zeroconf:
2913
# From the Avahi example code
2914
try:
2915
service.activate()
2916
except dbus.exceptions.DBusException as error:
2917
logger.critical("D-Bus Exception", exc_info=error)
2918
cleanup()
2919
sys.exit(1)
2920
# End of Avahi example code
905
2921
906
2922
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
907
2923
lambda *args, **kwargs:
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
2924
(tcp_server.handle_request
2925
(*args[2:], **kwargs) or True))
910
2926
911
logger.debug(u"Starting main loop")
2927
logger.debug("Starting main loop")
912
2928
main_loop.run()
913
except AvahiError, error:
914
logger.critical(u"AvahiError: %s" + unicode(error))
2929
except AvahiError as error:
2930
logger.critical("Avahi Error", exc_info=error)
2931
cleanup()
915
2932
sys.exit(1)
916
2933
except KeyboardInterrupt:
917
2934
if debug:
918
print
2935
print("", file=sys.stderr)
2936
logger.debug("Server received KeyboardInterrupt")
2937
logger.debug("Server exiting")
2938
# Must run before the D-Bus bus name gets deregistered
2939
cleanup()
2940
919
2941
920
2942
if __name__ == '__main__':
921
2943
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0