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- Committer: Teddy Hogeborn
- Date: 2015-07-12 01:41:14 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 325.
- Revision ID: teddy@recompile.se-20150712014114-qbala4mutkixxct3
Handle local Zeroconf service name collisions on startup, too.
* mandos (AvahiService.server_state_changed): Catch name collision
error when adding
server.
* mandos (AvahiService.server_state_changed): Catch name collision
error when adding
server.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- 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 © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
35
36
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
37
43
import socket
38
import optparse
44
import argparse
39
45
import datetime
40
46
import errno
41
47
import gnutls.crypto
44
50
import gnutls.library.functions
45
51
import gnutls.library.constants
46
52
import gnutls.library.types
47
import ConfigParser
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
48
57
import sys
49
58
import re
50
59
import os
51
60
import signal
52
from sets import Set
53
61
import subprocess
54
62
import atexit
55
63
import stat
56
64
import logging
57
65
import logging.handlers
58
66
import pwd
59
from contextlib import closing
67
import contextlib
60
68
import struct
61
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
62
82
63
83
import dbus
64
84
import dbus.service
65
import gobject
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
66
89
import avahi
67
90
from dbus.mainloop.glib import DBusGMainLoop
68
91
import ctypes
69
92
import ctypes.util
93
import xml.dom.minidom
94
import inspect
70
95
71
96
try:
72
97
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
74
99
try:
75
100
from IN import SO_BINDTODEVICE
76
101
except ImportError:
77
# From /usr/include/asm/socket.h
78
SO_BINDTODEVICE = 25
79
80
81
version = "1.0.8"
82
83
logger = logging.Logger(u'mandos')
84
syslogger = (logging.handlers.SysLogHandler
85
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
86
address = "/dev/log"))
87
syslogger.setFormatter(logging.Formatter
88
(u'Mandos [%(process)d]: %(levelname)s:'
89
u' %(message)s'))
90
logger.addHandler(syslogger)
91
92
console = logging.StreamHandler()
93
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
94
u' %(levelname)s:'
95
u' %(message)s'))
96
logger.addHandler(console)
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
97
236
98
237
class AvahiError(Exception):
99
238
def __init__(self, value, *args, **kwargs):
100
239
self.value = value
101
super(AvahiError, self).__init__(value, *args, **kwargs)
102
def __unicode__(self):
103
return unicode(repr(self.value))
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
104
243
105
244
class AvahiServiceError(AvahiError):
106
245
pass
107
246
247
108
248
class AvahiGroupError(AvahiError):
109
249
pass
110
250
115
255
Attributes:
116
256
interface: integer; avahi.IF_UNSPEC or an interface index.
117
257
Used to optionally bind to the specified interface.
118
name: string; Example: u'Mandos'
119
type: string; Example: u'_mandos._tcp'.
120
See <http://www.dns-sd.org/ServiceTypes.html>
258
name: string; Example: 'Mandos'
259
type: string; Example: '_mandos._tcp'.
260
See <https://www.iana.org/assignments/service-names-port-numbers>
121
261
port: integer; what port to announce
122
262
TXT: list of strings; TXT record for the service
123
263
domain: string; Domain to publish on, default to .local if empty.
125
265
max_renames: integer; maximum number of renames
126
266
rename_count: integer; counter so we only rename after collisions
127
267
a sensible number of times
268
group: D-Bus Entry Group
269
server: D-Bus Server
270
bus: dbus.SystemBus()
128
271
"""
129
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
130
servicetype = None, port = None, TXT = None,
131
domain = u"", host = u"", max_renames = 32768,
132
protocol = avahi.PROTO_UNSPEC):
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):
133
284
self.interface = interface
134
285
self.name = name
135
286
self.type = servicetype
140
291
self.rename_count = 0
141
292
self.max_renames = max_renames
142
293
self.protocol = protocol
143
def rename(self):
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):
144
300
"""Derived from the Avahi example code"""
145
301
if self.rename_count >= self.max_renames:
146
logger.critical(u"No suitable Zeroconf service name found"
147
u" after %i retries, exiting.",
302
logger.critical("No suitable Zeroconf service name found"
303
" after %i retries, exiting.",
148
304
self.rename_count)
149
raise AvahiServiceError(u"Too many renames")
150
self.name = server.GetAlternativeServiceName(self.name)
151
logger.info(u"Changing Zeroconf service name to %r ...",
305
raise AvahiServiceError("Too many renames")
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
308
self.rename_count += 1
309
logger.info("Changing Zeroconf service name to %r ...",
152
310
self.name)
153
syslogger.setFormatter(logging.Formatter
154
(u'Mandos (%s) [%%(process)d]:'
155
u' %%(levelname)s: %%(message)s'
156
% self.name))
157
self.remove()
158
self.add()
159
self.rename_count += 1
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
160
325
def remove(self):
161
326
"""Derived from the Avahi example code"""
162
if group is not None:
163
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
164
333
def add(self):
165
334
"""Derived from the Avahi example code"""
166
global group
167
if group is None:
168
group = dbus.Interface(bus.get_object
169
(avahi.DBUS_NAME,
170
server.EntryGroupNew()),
171
avahi.DBUS_INTERFACE_ENTRY_GROUP)
172
group.connect_to_signal('StateChanged',
173
entry_group_state_changed)
174
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
175
service.name, service.type)
176
group.AddService(
177
self.interface, # interface
178
self.protocol, # protocol
179
dbus.UInt32(0), # flags
180
self.name, self.type,
181
self.domain, self.host,
182
dbus.UInt16(self.port),
183
avahi.string_array_to_txt_array(self.TXT))
184
group.Commit()
185
186
# From the Avahi example code:
187
group = None # our entry group
188
# End of Avahi example code
189
190
191
def _datetime_to_dbus(dt, variant_level=0):
192
"""Convert a UTC datetime.datetime() to a D-Bus type."""
193
return dbus.String(dt.isoformat(), variant_level=variant_level)
194
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()
195
447
196
448
class Client(object):
197
449
"""A representation of a client host served by this server.
198
450
199
451
Attributes:
200
name: string; from the config file, used in log messages and
201
D-Bus identifiers
202
fingerprint: string (40 or 32 hexadecimal digits); used to
203
uniquely identify the client
204
secret: bytestring; sent verbatim (over TLS) to client
205
host: string; available for use by the checker command
206
created: datetime.datetime(); (UTC) object creation
207
last_enabled: datetime.datetime(); (UTC)
208
enabled: bool()
209
last_checked_ok: datetime.datetime(); (UTC) or None
210
timeout: datetime.timedelta(); How long from last_checked_ok
211
until this client is invalid
212
interval: datetime.timedelta(); How often to start a new checker
213
disable_hook: If set, called by disable() as disable_hook(self)
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
214
455
checker: subprocess.Popen(); a running checker process used
215
456
to see if the client lives.
216
457
'None' if no process is running.
217
checker_initiator_tag: a gobject event source tag, or None
218
disable_initiator_tag: - '' -
219
checker_callback_tag: - '' -
220
checker_command: string; External command which is run to check if
221
client lives. %() expansions are done at
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
222
461
runtime with vars(self) as dict, so that for
223
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
224
467
current_checker_command: string; current running checker_command
468
disable_initiator_tag: a gobject event source tag, or None
469
enabled: bool()
470
fingerprint: string (40 or 32 hexadecimal digits); used to
471
uniquely identify the client
472
host: string; available for use by the checker command
473
interval: datetime.timedelta(); How often to start a new checker
474
last_approval_request: datetime.datetime(); (UTC) or None
475
last_checked_ok: datetime.datetime(); (UTC) or None
476
last_checker_status: integer between 0 and 255 reflecting exit
477
status of last checker. -1 reflects crashed
478
checker, -2 means no checker completed yet.
479
last_checker_signal: The signal which killed the last checker, if
480
last_checker_status is -1
481
last_enabled: datetime.datetime(); (UTC) or None
482
name: string; from the config file, used in log messages and
483
D-Bus identifiers
484
secret: bytestring; sent verbatim (over TLS) to client
485
timeout: datetime.timedelta(); How long from last_checked_ok
486
until this client is disabled
487
extended_timeout: extra long timeout when secret has been sent
488
runtime_expansions: Allowed attributes for runtime expansion.
489
expires: datetime.datetime(); time (UTC) when a client will be
490
disabled, or None
491
server_settings: The server_settings dict from main()
225
492
"""
226
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
227
511
@staticmethod
228
def _datetime_to_milliseconds(dt):
229
"Convert a datetime.datetime() to milliseconds"
230
return ((dt.days * 24 * 60 * 60 * 1000)
231
+ (dt.seconds * 1000)
232
+ (dt.microseconds // 1000))
233
234
def timeout_milliseconds(self):
235
"Return the 'timeout' attribute in milliseconds"
236
return self._datetime_to_milliseconds(self.timeout)
237
238
def interval_milliseconds(self):
239
"Return the 'interval' attribute in milliseconds"
240
return self._datetime_to_milliseconds(self.interval)
241
242
def __init__(self, name = None, disable_hook=None, config=None):
243
"""Note: the 'checker' key in 'config' sets the
244
'checker_command' attribute and *not* the 'checker'
245
attribute."""
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):
246
562
self.name = name
247
if config is None:
248
config = {}
249
logger.debug(u"Creating client %r", self.name)
250
# Uppercase and remove spaces from fingerprint for later
251
# comparison purposes with return value from the fingerprint()
252
# function
253
self.fingerprint = (config[u"fingerprint"].upper()
254
.replace(u" ", u""))
255
logger.debug(u" Fingerprint: %s", self.fingerprint)
256
if u"secret" in config:
257
self.secret = config[u"secret"].decode(u"base64")
258
elif u"secfile" in config:
259
with closing(open(os.path.expanduser
260
(os.path.expandvars
261
(config[u"secfile"])))) as secfile:
262
self.secret = secfile.read()
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)
263
576
else:
264
raise TypeError(u"No secret or secfile for client %s"
265
% self.name)
266
self.host = config.get(u"host", u"")
267
self.created = datetime.datetime.utcnow()
268
self.enabled = False
269
self.last_enabled = None
270
self.last_checked_ok = None
271
self.timeout = string_to_delta(config[u"timeout"])
272
self.interval = string_to_delta(config[u"interval"])
273
self.disable_hook = disable_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
274
586
self.checker = None
275
587
self.checker_initiator_tag = None
276
588
self.disable_initiator_tag = None
277
589
self.checker_callback_tag = None
278
self.checker_command = config[u"checker"]
279
590
self.current_checker_command = None
280
self.last_connect = 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()
281
609
282
610
def enable(self):
283
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
284
617
self.last_enabled = datetime.datetime.utcnow()
285
# Schedule a new checker to be started an 'interval' from now,
286
# and every interval from then on.
287
self.checker_initiator_tag = (gobject.timeout_add
288
(self.interval_milliseconds(),
289
self.start_checker))
290
# Also start a new checker *right now*.
291
self.start_checker()
292
# Schedule a disable() when 'timeout' has passed
293
self.disable_initiator_tag = (gobject.timeout_add
294
(self.timeout_milliseconds(),
295
self.disable))
296
self.enabled = True
618
self.init_checker()
619
self.send_changedstate()
297
620
298
def disable(self):
621
def disable(self, quiet=True):
299
622
"""Disable this client."""
300
623
if not getattr(self, "enabled", False):
301
624
return False
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, u"disable_initiator_tag", False):
625
if not quiet:
626
logger.info("Disabling client %s", self.name)
627
if getattr(self, "disable_initiator_tag", None) is not None:
304
628
gobject.source_remove(self.disable_initiator_tag)
305
629
self.disable_initiator_tag = None
306
if getattr(self, u"checker_initiator_tag", False):
630
self.expires = None
631
if getattr(self, "checker_initiator_tag", None) is not None:
307
632
gobject.source_remove(self.checker_initiator_tag)
308
633
self.checker_initiator_tag = None
309
634
self.stop_checker()
310
if self.disable_hook:
311
self.disable_hook(self)
312
635
self.enabled = False
636
if not quiet:
637
self.send_changedstate()
313
638
# Do not run this again if called by a gobject.timeout_add
314
639
return False
315
640
316
641
def __del__(self):
317
self.disable_hook = None
318
642
self.disable()
319
643
320
def checker_callback(self, pid, condition, command):
644
def init_checker(self):
645
# Schedule a new checker to be started an 'interval' from now,
646
# and every interval from then on.
647
if self.checker_initiator_tag is not None:
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
650
int(self.interval.total_seconds() * 1000),
651
self.start_checker)
652
# Schedule a disable() when 'timeout' has passed
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
656
int(self.timeout.total_seconds() * 1000), self.disable)
657
# Also start a new checker *right now*.
658
self.start_checker()
659
660
def checker_callback(self, source, condition, connection,
661
command):
321
662
"""The checker has completed, so take appropriate actions."""
322
663
self.checker_callback_tag = None
323
664
self.checker = None
324
if os.WIFEXITED(condition):
325
exitstatus = os.WEXITSTATUS(condition)
326
if exitstatus == 0:
327
logger.info(u"Checker for %(name)s succeeded",
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",
328
674
vars(self))
329
675
self.checked_ok()
330
676
else:
331
logger.info(u"Checker for %(name)s failed",
332
vars(self))
677
logger.info("Checker for %(name)s failed", vars(self))
333
678
else:
334
logger.warning(u"Checker for %(name)s crashed?",
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
681
logger.warning("Checker for %(name)s crashed?",
335
682
vars(self))
683
return False
336
684
337
685
def checked_ok(self):
338
"""Bump up the timeout for this client.
339
340
This should only be called when the client has been seen,
341
alive and well.
342
"""
686
"""Assert that the client has been seen, alive and well."""
343
687
self.last_checked_ok = datetime.datetime.utcnow()
344
gobject.source_remove(self.disable_initiator_tag)
345
self.disable_initiator_tag = (gobject.timeout_add
346
(self.timeout_milliseconds(),
347
self.disable))
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()
348
706
349
707
def start_checker(self):
350
708
"""Start a new checker subprocess if one is not running.
352
710
If a checker already exists, leave it running and do
353
711
nothing."""
354
712
# The reason for not killing a running checker is that if we
355
# did that, then if a checker (for some reason) started
356
# running slowly and taking more than 'interval' time, the
357
# client would inevitably timeout, since no checker would get
358
# 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
359
717
# checkers alone, the checker would have to take more time
360
# than 'timeout' for the client to be declared invalid, which
361
# is as it should be.
718
# than 'timeout' for the client to be disabled, which is as it
719
# should be.
362
720
363
# If a checker exists, make sure it is not a zombie
364
if self.checker is not None:
365
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
366
if pid:
367
logger.warning(u"Checker was a zombie")
368
gobject.source_remove(self.checker_callback_tag)
369
self.checker_callback(pid, status,
370
self.current_checker_command)
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
371
725
# Start a new checker if needed
372
726
if self.checker is None:
727
# Escape attributes for the shell
728
escaped_attrs = {
729
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
373
731
try:
374
# In case checker_command has exactly one % operator
375
command = self.checker_command % self.host
376
except TypeError:
377
# Escape attributes for the shell
378
escaped_attrs = dict((key,
379
re.escape(unicode(str(val),
380
errors=
381
u'replace')))
382
for key, val in
383
vars(self).iteritems())
384
try:
385
command = self.checker_command % escaped_attrs
386
except TypeError, error:
387
logger.error(u'Could not format string "%s":'
388
u' %s', self.checker_command, error)
389
return True # Try again later
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
390
738
self.current_checker_command = command
391
try:
392
logger.info(u"Starting checker %r for %s",
393
command, self.name)
394
# We don't need to redirect stdout and stderr, since
395
# in normal mode, that is already done by daemon(),
396
# and in debug mode we don't want to. (Stdin is
397
# always replaced by /dev/null.)
398
self.checker = subprocess.Popen(command,
399
close_fds=True,
400
shell=True, cwd=u"/")
401
self.checker_callback_tag = (gobject.child_watch_add
402
(self.checker.pid,
403
self.checker_callback,
404
data=command))
405
# The checker may have completed before the gobject
406
# watch was added. Check for this.
407
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
408
if pid:
409
gobject.source_remove(self.checker_callback_tag)
410
self.checker_callback(pid, status, command)
411
except OSError, error:
412
logger.error(u"Failed to start subprocess: %s",
413
error)
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)
414
764
# Re-run this periodically if run by gobject.timeout_add
415
765
return True
416
766
419
769
if self.checker_callback_tag:
420
770
gobject.source_remove(self.checker_callback_tag)
421
771
self.checker_callback_tag = None
422
if getattr(self, u"checker", None) is None:
772
if getattr(self, "checker", None) is None:
423
773
return
424
logger.debug(u"Stopping checker for %(name)s", vars(self))
774
logger.debug("Stopping checker for %(name)s", vars(self))
775
self.checker.terminate()
776
self.checker = None
777
778
779
def dbus_service_property(dbus_interface,
780
signature="v",
781
access="readwrite",
782
byte_arrays=False):
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
become properties on the D-Bus.
785
786
The decorated method will be called with no arguments by "Get"
787
and with one argument by "Set".
788
789
The parameters, where they are supported, are the same as
790
dbus.service.method, except there is only "signature", since the
791
type from Get() and the type sent to Set() is the same.
792
"""
793
# Encoding deeply encoded byte arrays is not supported yet by the
794
# "Set" method, so we fail early here:
795
if byte_arrays and signature != "ay":
796
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {!r}".format(signature))
798
799
def decorator(func):
800
func._dbus_is_property = True
801
func._dbus_interface = dbus_interface
802
func._dbus_signature = signature
803
func._dbus_access = access
804
func._dbus_name = func.__name__
805
if func._dbus_name.endswith("_dbus_property"):
806
func._dbus_name = func._dbus_name[:-14]
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
808
return func
809
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
831
return decorator
832
833
834
def dbus_annotations(annotations):
835
"""Decorator to annotate D-Bus methods, signals or properties
836
Usage:
837
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
@dbus_service_property("org.example.Interface", signature="b",
842
access="r")
843
def Property_dbus_property(self):
844
return dbus.Boolean(False)
845
"""
846
847
def decorator(func):
848
func._dbus_annotations = annotations
849
return func
850
851
return decorator
852
853
854
class DBusPropertyException(dbus.exceptions.DBusException):
855
"""A base class for D-Bus property-related exceptions
856
"""
857
pass
858
859
860
class DBusPropertyAccessException(DBusPropertyException):
861
"""A property's access permissions disallows an operation.
862
"""
863
pass
864
865
866
class DBusPropertyNotFound(DBusPropertyException):
867
"""An attempt was made to access a non-existing property.
868
"""
869
pass
870
871
872
class DBusObjectWithProperties(dbus.service.Object):
873
"""A D-Bus object with properties.
874
875
Classes inheriting from this can use the dbus_service_property
876
decorator to expose methods as D-Bus properties. It exposes the
877
standard Get(), Set(), and GetAll() methods on the D-Bus.
878
"""
879
880
@staticmethod
881
def _is_dbus_thing(thing):
882
"""Returns a function testing if an attribute is a D-Bus thing
883
884
If called like _is_dbus_thing("method") it returns a function
885
suitable for use as predicate to inspect.getmembers().
886
"""
887
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
888
False)
889
890
def _get_all_dbus_things(self, thing):
891
"""Returns a generator of (name, attribute) pairs
892
"""
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
894
athing.__get__(self))
895
for cls in self.__class__.__mro__
896
for name, athing in
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
898
899
def _get_dbus_property(self, interface_name, property_name):
900
"""Returns a bound method if one exists which is a D-Bus
901
property with the specified name and interface.
902
"""
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
906
if (value._dbus_name == property_name
907
and value._dbus_interface == interface_name):
908
return value.__get__(self)
909
910
# No such property
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
913
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
915
in_signature="ss",
916
out_signature="v")
917
def Get(self, interface_name, property_name):
918
"""Standard D-Bus property Get() method, see D-Bus standard.
919
"""
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "write":
922
raise DBusPropertyAccessException(property_name)
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
return value
926
return type(value)(value, variant_level=value.variant_level+1)
927
928
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
def Set(self, interface_name, property_name, value):
930
"""Standard D-Bus property Set() method, see D-Bus standard.
931
"""
932
prop = self._get_dbus_property(interface_name, property_name)
933
if prop._dbus_access == "read":
934
raise DBusPropertyAccessException(property_name)
935
if prop._dbus_get_args_options["byte_arrays"]:
936
# The byte_arrays option is not supported yet on
937
# signatures other than "ay".
938
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
944
prop(value)
945
946
@dbus.service.method(dbus.PROPERTIES_IFACE,
947
in_signature="s",
948
out_signature="a{sv}")
949
def GetAll(self, interface_name):
950
"""Standard D-Bus property GetAll() method, see D-Bus
951
standard.
952
953
Note: Will not include properties with access="write".
954
"""
955
properties = {}
956
for name, prop in self._get_all_dbus_things("property"):
957
if (interface_name
958
and interface_name != prop._dbus_interface):
959
# Interface non-empty but did not match
960
continue
961
# Ignore write-only properties
962
if prop._dbus_access == "write":
963
continue
964
value = prop()
965
if not hasattr(value, "variant_level"):
966
properties[name] = value
967
continue
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
970
return dbus.Dictionary(properties, signature="sv")
971
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
976
standard.
977
"""
978
pass
979
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
981
out_signature="s",
982
path_keyword='object_path',
983
connection_keyword='connection')
984
def Introspect(self, object_path, connection):
985
"""Overloading of standard D-Bus method.
986
987
Inserts property tags and interface annotation tags.
988
"""
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
990
connection)
425
991
try:
426
os.kill(self.checker.pid, signal.SIGTERM)
427
#os.sleep(0.5)
428
#if self.checker.poll() is None:
429
# os.kill(self.checker.pid, signal.SIGKILL)
430
except OSError, error:
431
if error.errno != errno.ESRCH: # No such process
432
raise
433
self.checker = None
434
435
def still_valid(self):
436
"""Has the timeout not yet passed for this client?"""
437
if not getattr(self, u"enabled", False):
438
return False
439
now = datetime.datetime.utcnow()
440
if self.last_checked_ok is None:
441
return now < (self.created + self.timeout)
442
else:
443
return now < (self.last_checked_ok + self.timeout)
444
445
446
class ClientDBus(Client, dbus.service.Object):
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):
447
1253
"""A Client class using D-Bus
448
1254
449
1255
Attributes:
450
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
1256
dbus_object_path: dbus.ObjectPath
1257
bus: dbus.SystemBus()
451
1258
"""
1259
1260
runtime_expansions = (Client.runtime_expansions
1261
+ ("dbus_object_path", ))
1262
1263
_interface = "se.recompile.Mandos.Client"
1264
452
1265
# dbus.service.Object doesn't use super(), so we can't either.
453
1266
454
def __init__(self, *args, **kwargs):
1267
def __init__(self, bus = None, *args, **kwargs):
1268
self.bus = bus
455
1269
Client.__init__(self, *args, **kwargs)
456
1270
# Only now, when this client is initialized, can it show up on
457
1271
# the D-Bus
458
self.dbus_object_path = (dbus.ObjectPath
459
(u"/clients/"
460
+ self.name.replace(u".", u"_")))
461
dbus.service.Object.__init__(self, bus,
462
self.dbus_object_path)
463
def enable(self):
464
oldstate = getattr(self, u"enabled", False)
465
r = Client.enable(self)
466
if oldstate != self.enabled:
467
# Emit D-Bus signals
468
self.PropertyChanged(dbus.String(u"enabled"),
469
dbus.Boolean(True, variant_level=1))
470
self.PropertyChanged(dbus.String(u"last_enabled"),
471
(_datetime_to_dbus(self.last_enabled,
472
variant_level=1)))
473
return r
474
475
def disable(self, signal = True):
476
oldstate = getattr(self, u"enabled", False)
477
r = Client.disable(self)
478
if signal and oldstate != self.enabled:
479
# Emit D-Bus signal
480
self.PropertyChanged(dbus.String(u"enabled"),
481
dbus.Boolean(False, variant_level=1))
482
return r
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
483
1360
484
1361
def __del__(self, *args, **kwargs):
485
1362
try:
486
1363
self.remove_from_connection()
487
1364
except LookupError:
488
1365
pass
489
if hasattr(dbus.service.Object, u"__del__"):
490
dbus.service.Object.__del__(self, *args, **kwargs)
1366
if hasattr(DBusObjectWithProperties, "__del__"):
1367
DBusObjectWithProperties.__del__(self, *args, **kwargs)
491
1368
Client.__del__(self, *args, **kwargs)
492
1369
493
def checker_callback(self, pid, condition, command,
494
*args, **kwargs):
495
self.checker_callback_tag = None
496
self.checker = None
497
# Emit D-Bus signal
498
self.PropertyChanged(dbus.String(u"checker_running"),
499
dbus.Boolean(False, variant_level=1))
500
if os.WIFEXITED(condition):
501
exitstatus = os.WEXITSTATUS(condition)
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:
502
1377
# Emit D-Bus signal
503
1378
self.CheckerCompleted(dbus.Int16(exitstatus),
504
dbus.Int64(condition),
1379
dbus.Int64(0),
505
1380
dbus.String(command))
506
1381
else:
507
1382
# Emit D-Bus signal
508
1383
self.CheckerCompleted(dbus.Int16(-1),
509
dbus.Int64(condition),
1384
dbus.Int64(
1385
self.last_checker_signal),
510
1386
dbus.String(command))
511
512
return Client.checker_callback(self, pid, condition, command,
513
*args, **kwargs)
514
515
def checked_ok(self, *args, **kwargs):
516
r = Client.checked_ok(self, *args, **kwargs)
517
# Emit D-Bus signal
518
self.PropertyChanged(
519
dbus.String(u"last_checked_ok"),
520
(_datetime_to_dbus(self.last_checked_ok,
521
variant_level=1)))
522
return r
1387
return ret
523
1388
524
1389
def start_checker(self, *args, **kwargs):
525
old_checker = self.checker
526
if self.checker is not None:
527
old_checker_pid = self.checker.pid
528
else:
529
old_checker_pid = None
1390
old_checker_pid = getattr(self.checker, "pid", None)
530
1391
r = Client.start_checker(self, *args, **kwargs)
531
1392
# Only if new checker process was started
532
1393
if (self.checker is not None
533
1394
and old_checker_pid != self.checker.pid):
534
1395
# Emit D-Bus signal
535
1396
self.CheckerStarted(self.current_checker_command)
536
self.PropertyChanged(
537
dbus.String(u"checker_running"),
538
dbus.Boolean(True, variant_level=1))
539
return r
540
541
def stop_checker(self, *args, **kwargs):
542
old_checker = getattr(self, u"checker", None)
543
r = Client.stop_checker(self, *args, **kwargs)
544
if (old_checker is not None
545
and getattr(self, u"checker", None) is None):
546
self.PropertyChanged(dbus.String(u"checker_running"),
547
dbus.Boolean(False, variant_level=1))
548
return r
549
550
## D-Bus methods & signals
551
_interface = u"se.bsnet.fukt.Mandos.Client"
552
553
# CheckedOK - method
554
@dbus.service.method(_interface)
555
def CheckedOK(self):
556
return self.checked_ok()
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
557
1414
558
1415
# CheckerCompleted - signal
559
@dbus.service.signal(_interface, signature=u"nxs")
1416
@dbus.service.signal(_interface, signature="nxs")
560
1417
def CheckerCompleted(self, exitcode, waitstatus, command):
561
1418
"D-Bus signal"
562
1419
pass
563
1420
564
1421
# CheckerStarted - signal
565
@dbus.service.signal(_interface, signature=u"s")
1422
@dbus.service.signal(_interface, signature="s")
566
1423
def CheckerStarted(self, command):
567
1424
"D-Bus signal"
568
1425
pass
569
1426
570
# GetAllProperties - method
571
@dbus.service.method(_interface, out_signature=u"a{sv}")
572
def GetAllProperties(self):
573
"D-Bus method"
574
return dbus.Dictionary({
575
dbus.String(u"name"):
576
dbus.String(self.name, variant_level=1),
577
dbus.String(u"fingerprint"):
578
dbus.String(self.fingerprint, variant_level=1),
579
dbus.String(u"host"):
580
dbus.String(self.host, variant_level=1),
581
dbus.String(u"created"):
582
_datetime_to_dbus(self.created, variant_level=1),
583
dbus.String(u"last_enabled"):
584
(_datetime_to_dbus(self.last_enabled,
585
variant_level=1)
586
if self.last_enabled is not None
587
else dbus.Boolean(False, variant_level=1)),
588
dbus.String(u"enabled"):
589
dbus.Boolean(self.enabled, variant_level=1),
590
dbus.String(u"last_checked_ok"):
591
(_datetime_to_dbus(self.last_checked_ok,
592
variant_level=1)
593
if self.last_checked_ok is not None
594
else dbus.Boolean (False, variant_level=1)),
595
dbus.String(u"timeout"):
596
dbus.UInt64(self.timeout_milliseconds(),
597
variant_level=1),
598
dbus.String(u"interval"):
599
dbus.UInt64(self.interval_milliseconds(),
600
variant_level=1),
601
dbus.String(u"checker"):
602
dbus.String(self.checker_command,
603
variant_level=1),
604
dbus.String(u"checker_running"):
605
dbus.Boolean(self.checker is not None,
606
variant_level=1),
607
dbus.String(u"object_path"):
608
dbus.ObjectPath(self.dbus_object_path,
609
variant_level=1)
610
}, signature=u"sv")
611
612
# IsStillValid - method
613
@dbus.service.method(_interface, out_signature=u"b")
614
def IsStillValid(self):
615
return self.still_valid()
616
617
1427
# PropertyChanged - signal
618
@dbus.service.signal(_interface, signature=u"sv")
1428
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1429
@dbus.service.signal(_interface, signature="sv")
619
1430
def PropertyChanged(self, property, value):
620
1431
"D-Bus signal"
621
1432
pass
622
1433
623
# ReceivedSecret - signal
1434
# GotSecret - signal
624
1435
@dbus.service.signal(_interface)
625
def ReceivedSecret(self):
626
"D-Bus signal"
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
"""
627
1441
pass
628
1442
629
1443
# Rejected - signal
630
@dbus.service.signal(_interface)
631
def Rejected(self):
1444
@dbus.service.signal(_interface, signature="s")
1445
def Rejected(self, reason):
632
1446
"D-Bus signal"
633
1447
pass
634
1448
635
# SetChecker - method
636
@dbus.service.method(_interface, in_signature=u"s")
637
def SetChecker(self, checker):
638
"D-Bus setter method"
639
self.checker_command = checker
640
# Emit D-Bus signal
641
self.PropertyChanged(dbus.String(u"checker"),
642
dbus.String(self.checker_command,
643
variant_level=1))
644
645
# SetHost - method
646
@dbus.service.method(_interface, in_signature=u"s")
647
def SetHost(self, host):
648
"D-Bus setter method"
649
self.host = host
650
# Emit D-Bus signal
651
self.PropertyChanged(dbus.String(u"host"),
652
dbus.String(self.host, variant_level=1))
653
654
# SetInterval - method
655
@dbus.service.method(_interface, in_signature=u"t")
656
def SetInterval(self, milliseconds):
657
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
658
# Emit D-Bus signal
659
self.PropertyChanged(dbus.String(u"interval"),
660
(dbus.UInt64(self.interval_milliseconds(),
661
variant_level=1)))
662
663
# SetSecret - method
664
@dbus.service.method(_interface, in_signature=u"ay",
665
byte_arrays=True)
666
def SetSecret(self, secret):
667
"D-Bus setter method"
668
self.secret = str(secret)
669
670
# SetTimeout - method
671
@dbus.service.method(_interface, in_signature=u"t")
672
def SetTimeout(self, milliseconds):
673
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
674
# Emit D-Bus signal
675
self.PropertyChanged(dbus.String(u"timeout"),
676
(dbus.UInt64(self.timeout_milliseconds(),
677
variant_level=1)))
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()
678
1466
679
1467
# Enable - method
680
1468
@dbus.service.method(_interface)
699
1487
def StopChecker(self):
700
1488
self.stop_checker()
701
1489
1490
## Properties
1491
1492
# ApprovalPending - property
1493
@dbus_service_property(_interface, signature="b", access="read")
1494
def ApprovalPending_dbus_property(self):
1495
return dbus.Boolean(bool(self.approvals_pending))
1496
1497
# ApprovedByDefault - property
1498
@dbus_service_property(_interface,
1499
signature="b",
1500
access="readwrite")
1501
def ApprovedByDefault_dbus_property(self, value=None):
1502
if value is None: # get
1503
return dbus.Boolean(self.approved_by_default)
1504
self.approved_by_default = bool(value)
1505
1506
# ApprovalDelay - property
1507
@dbus_service_property(_interface,
1508
signature="t",
1509
access="readwrite")
1510
def ApprovalDelay_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.UInt64(self.approval_delay.total_seconds()
1513
* 1000)
1514
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1515
1516
# ApprovalDuration - property
1517
@dbus_service_property(_interface,
1518
signature="t",
1519
access="readwrite")
1520
def ApprovalDuration_dbus_property(self, value=None):
1521
if value is None: # get
1522
return dbus.UInt64(self.approval_duration.total_seconds()
1523
* 1000)
1524
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1525
1526
# Name - property
1527
@dbus_service_property(_interface, signature="s", access="read")
1528
def Name_dbus_property(self):
1529
return dbus.String(self.name)
1530
1531
# Fingerprint - property
1532
@dbus_service_property(_interface, signature="s", access="read")
1533
def Fingerprint_dbus_property(self):
1534
return dbus.String(self.fingerprint)
1535
1536
# Host - property
1537
@dbus_service_property(_interface,
1538
signature="s",
1539
access="readwrite")
1540
def Host_dbus_property(self, value=None):
1541
if value is None: # get
1542
return dbus.String(self.host)
1543
self.host = str(value)
1544
1545
# Created - property
1546
@dbus_service_property(_interface, signature="s", access="read")
1547
def Created_dbus_property(self):
1548
return datetime_to_dbus(self.created)
1549
1550
# LastEnabled - property
1551
@dbus_service_property(_interface, signature="s", access="read")
1552
def LastEnabled_dbus_property(self):
1553
return datetime_to_dbus(self.last_enabled)
1554
1555
# Enabled - property
1556
@dbus_service_property(_interface,
1557
signature="b",
1558
access="readwrite")
1559
def Enabled_dbus_property(self, value=None):
1560
if value is None: # get
1561
return dbus.Boolean(self.enabled)
1562
if value:
1563
self.enable()
1564
else:
1565
self.disable()
1566
1567
# LastCheckedOK - property
1568
@dbus_service_property(_interface,
1569
signature="s",
1570
access="readwrite")
1571
def LastCheckedOK_dbus_property(self, value=None):
1572
if value is not None:
1573
self.checked_ok()
1574
return
1575
return datetime_to_dbus(self.last_checked_ok)
1576
1577
# LastCheckerStatus - property
1578
@dbus_service_property(_interface, signature="n", access="read")
1579
def LastCheckerStatus_dbus_property(self):
1580
return dbus.Int16(self.last_checker_status)
1581
1582
# Expires - property
1583
@dbus_service_property(_interface, signature="s", access="read")
1584
def Expires_dbus_property(self):
1585
return datetime_to_dbus(self.expires)
1586
1587
# LastApprovalRequest - property
1588
@dbus_service_property(_interface, signature="s", access="read")
1589
def LastApprovalRequest_dbus_property(self):
1590
return datetime_to_dbus(self.last_approval_request)
1591
1592
# Timeout - property
1593
@dbus_service_property(_interface,
1594
signature="t",
1595
access="readwrite")
1596
def Timeout_dbus_property(self, value=None):
1597
if value is None: # get
1598
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1599
old_timeout = self.timeout
1600
self.timeout = datetime.timedelta(0, 0, 0, value)
1601
# Reschedule disabling
1602
if self.enabled:
1603
now = datetime.datetime.utcnow()
1604
self.expires += self.timeout - old_timeout
1605
if self.expires <= now:
1606
# The timeout has passed
1607
self.disable()
1608
else:
1609
if (getattr(self, "disable_initiator_tag", None)
1610
is None):
1611
return
1612
gobject.source_remove(self.disable_initiator_tag)
1613
self.disable_initiator_tag = gobject.timeout_add(
1614
int((self.expires - now).total_seconds() * 1000),
1615
self.disable)
1616
1617
# ExtendedTimeout - property
1618
@dbus_service_property(_interface,
1619
signature="t",
1620
access="readwrite")
1621
def ExtendedTimeout_dbus_property(self, value=None):
1622
if value is None: # get
1623
return dbus.UInt64(self.extended_timeout.total_seconds()
1624
* 1000)
1625
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1626
1627
# Interval - property
1628
@dbus_service_property(_interface,
1629
signature="t",
1630
access="readwrite")
1631
def Interval_dbus_property(self, value=None):
1632
if value is None: # get
1633
return dbus.UInt64(self.interval.total_seconds() * 1000)
1634
self.interval = datetime.timedelta(0, 0, 0, value)
1635
if getattr(self, "checker_initiator_tag", None) is None:
1636
return
1637
if self.enabled:
1638
# Reschedule checker run
1639
gobject.source_remove(self.checker_initiator_tag)
1640
self.checker_initiator_tag = gobject.timeout_add(
1641
value, self.start_checker)
1642
self.start_checker() # Start one now, too
1643
1644
# Checker - property
1645
@dbus_service_property(_interface,
1646
signature="s",
1647
access="readwrite")
1648
def Checker_dbus_property(self, value=None):
1649
if value is None: # get
1650
return dbus.String(self.checker_command)
1651
self.checker_command = str(value)
1652
1653
# CheckerRunning - property
1654
@dbus_service_property(_interface,
1655
signature="b",
1656
access="readwrite")
1657
def CheckerRunning_dbus_property(self, value=None):
1658
if value is None: # get
1659
return dbus.Boolean(self.checker is not None)
1660
if value:
1661
self.start_checker()
1662
else:
1663
self.stop_checker()
1664
1665
# ObjectPath - property
1666
@dbus_service_property(_interface, signature="o", access="read")
1667
def ObjectPath_dbus_property(self):
1668
return self.dbus_object_path # is already a dbus.ObjectPath
1669
1670
# Secret = property
1671
@dbus_service_property(_interface,
1672
signature="ay",
1673
access="write",
1674
byte_arrays=True)
1675
def Secret_dbus_property(self, value):
1676
self.secret = bytes(value)
1677
702
1678
del _interface
703
1679
704
1680
705
class ClientHandler(SocketServer.BaseRequestHandler, object):
1681
class ProxyClient(object):
1682
def __init__(self, child_pipe, fpr, address):
1683
self._pipe = child_pipe
1684
self._pipe.send(('init', fpr, address))
1685
if not self._pipe.recv():
1686
raise KeyError(fpr)
1687
1688
def __getattribute__(self, name):
1689
if name == '_pipe':
1690
return super(ProxyClient, self).__getattribute__(name)
1691
self._pipe.send(('getattr', name))
1692
data = self._pipe.recv()
1693
if data[0] == 'data':
1694
return data[1]
1695
if data[0] == 'function':
1696
1697
def func(*args, **kwargs):
1698
self._pipe.send(('funcall', name, args, kwargs))
1699
return self._pipe.recv()[1]
1700
1701
return func
1702
1703
def __setattr__(self, name, value):
1704
if name == '_pipe':
1705
return super(ProxyClient, self).__setattr__(name, value)
1706
self._pipe.send(('setattr', name, value))
1707
1708
1709
class ClientHandler(socketserver.BaseRequestHandler, object):
706
1710
"""A class to handle client connections.
707
1711
708
1712
Instantiated once for each connection to handle it.
709
1713
Note: This will run in its own forked process."""
710
1714
711
1715
def handle(self):
712
logger.info(u"TCP connection from: %s",
713
unicode(self.client_address))
714
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
715
# Open IPC pipe to parent process
716
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
717
session = (gnutls.connection
718
.ClientSession(self.request,
719
gnutls.connection
720
.X509Credentials()))
1716
with contextlib.closing(self.server.child_pipe) as child_pipe:
1717
logger.info("TCP connection from: %s",
1718
str(self.client_address))
1719
logger.debug("Pipe FD: %d",
1720
self.server.child_pipe.fileno())
721
1721
722
line = self.request.makefile().readline()
723
logger.debug(u"Protocol version: %r", line)
724
try:
725
if int(line.strip().split()[0]) > 1:
726
raise RuntimeError
727
except (ValueError, IndexError, RuntimeError), error:
728
logger.error(u"Unknown protocol version: %s", error)
729
return
1722
session = gnutls.connection.ClientSession(
1723
self.request, gnutls.connection .X509Credentials())
730
1724
731
1725
# Note: gnutls.connection.X509Credentials is really a
732
1726
# generic GnuTLS certificate credentials object so long as
733
1727
# no X.509 keys are added to it. Therefore, we can use it
734
1728
# here despite using OpenPGP certificates.
735
1729
736
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
737
# u"+AES-256-CBC", u"+SHA1",
738
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
739
# u"+DHE-DSS"))
1730
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1731
# "+AES-256-CBC", "+SHA1",
1732
# "+COMP-NULL", "+CTYPE-OPENPGP",
1733
# "+DHE-DSS"))
740
1734
# Use a fallback default, since this MUST be set.
741
1735
priority = self.server.gnutls_priority
742
1736
if priority is None:
743
priority = u"NORMAL"
744
(gnutls.library.functions
745
.gnutls_priority_set_direct(session._c_object,
746
priority, None))
747
1737
priority = "NORMAL"
1738
gnutls.library.functions.gnutls_priority_set_direct(
1739
session._c_object, priority, None)
1740
1741
# Start communication using the Mandos protocol
1742
# Get protocol number
1743
line = self.request.makefile().readline()
1744
logger.debug("Protocol version: %r", line)
1745
try:
1746
if int(line.strip().split()[0]) > 1:
1747
raise RuntimeError(line)
1748
except (ValueError, IndexError, RuntimeError) as error:
1749
logger.error("Unknown protocol version: %s", error)
1750
return
1751
1752
# Start GnuTLS connection
748
1753
try:
749
1754
session.handshake()
750
except gnutls.errors.GNUTLSError, error:
751
logger.warning(u"Handshake failed: %s", error)
1755
except gnutls.errors.GNUTLSError as error:
1756
logger.warning("Handshake failed: %s", error)
752
1757
# Do not run session.bye() here: the session is not
753
1758
# established. Just abandon the request.
754
1759
return
755
logger.debug(u"Handshake succeeded")
1760
logger.debug("Handshake succeeded")
1761
1762
approval_required = False
756
1763
try:
757
fpr = self.fingerprint(self.peer_certificate(session))
758
except (TypeError, gnutls.errors.GNUTLSError), error:
759
logger.warning(u"Bad certificate: %s", error)
760
session.bye()
761
return
762
logger.debug(u"Fingerprint: %s", fpr)
1764
try:
1765
fpr = self.fingerprint(
1766
self.peer_certificate(session))
1767
except (TypeError,
1768
gnutls.errors.GNUTLSError) as error:
1769
logger.warning("Bad certificate: %s", error)
1770
return
1771
logger.debug("Fingerprint: %s", fpr)
1772
1773
try:
1774
client = ProxyClient(child_pipe, fpr,
1775
self.client_address)
1776
except KeyError:
1777
return
1778
1779
if client.approval_delay:
1780
delay = client.approval_delay
1781
client.approvals_pending += 1
1782
approval_required = True
1783
1784
while True:
1785
if not client.enabled:
1786
logger.info("Client %s is disabled",
1787
client.name)
1788
if self.server.use_dbus:
1789
# Emit D-Bus signal
1790
client.Rejected("Disabled")
1791
return
1792
1793
if client.approved or not client.approval_delay:
1794
#We are approved or approval is disabled
1795
break
1796
elif client.approved is None:
1797
logger.info("Client %s needs approval",
1798
client.name)
1799
if self.server.use_dbus:
1800
# Emit D-Bus signal
1801
client.NeedApproval(
1802
client.approval_delay.total_seconds()
1803
* 1000, client.approved_by_default)
1804
else:
1805
logger.warning("Client %s was not approved",
1806
client.name)
1807
if self.server.use_dbus:
1808
# Emit D-Bus signal
1809
client.Rejected("Denied")
1810
return
1811
1812
#wait until timeout or approved
1813
time = datetime.datetime.now()
1814
client.changedstate.acquire()
1815
client.changedstate.wait(delay.total_seconds())
1816
client.changedstate.release()
1817
time2 = datetime.datetime.now()
1818
if (time2 - time) >= delay:
1819
if not client.approved_by_default:
1820
logger.warning("Client %s timed out while"
1821
" waiting for approval",
1822
client.name)
1823
if self.server.use_dbus:
1824
# Emit D-Bus signal
1825
client.Rejected("Approval timed out")
1826
return
1827
else:
1828
break
1829
else:
1830
delay -= time2 - time
1831
1832
sent_size = 0
1833
while sent_size < len(client.secret):
1834
try:
1835
sent = session.send(client.secret[sent_size:])
1836
except gnutls.errors.GNUTLSError as error:
1837
logger.warning("gnutls send failed",
1838
exc_info=error)
1839
return
1840
logger.debug("Sent: %d, remaining: %d", sent,
1841
len(client.secret) - (sent_size
1842
+ sent))
1843
sent_size += sent
1844
1845
logger.info("Sending secret to %s", client.name)
1846
# bump the timeout using extended_timeout
1847
client.bump_timeout(client.extended_timeout)
1848
if self.server.use_dbus:
1849
# Emit D-Bus signal
1850
client.GotSecret()
763
1851
764
for c in self.server.clients:
765
if c.fingerprint == fpr:
766
client = c
767
break
768
else:
769
ipc.write(u"NOTFOUND %s\n" % fpr)
770
session.bye()
771
return
772
# Have to check if client.still_valid(), since it is
773
# possible that the client timed out while establishing
774
# the GnuTLS session.
775
if not client.still_valid():
776
ipc.write(u"INVALID %s\n" % client.name)
777
session.bye()
778
return
779
ipc.write(u"SENDING %s\n" % client.name)
780
sent_size = 0
781
while sent_size < len(client.secret):
782
sent = session.send(client.secret[sent_size:])
783
logger.debug(u"Sent: %d, remaining: %d",
784
sent, len(client.secret)
785
- (sent_size + sent))
786
sent_size += sent
787
session.bye()
1852
finally:
1853
if approval_required:
1854
client.approvals_pending -= 1
1855
try:
1856
session.bye()
1857
except gnutls.errors.GNUTLSError as error:
1858
logger.warning("GnuTLS bye failed",
1859
exc_info=error)
788
1860
789
1861
@staticmethod
790
1862
def peer_certificate(session):
791
1863
"Return the peer's OpenPGP certificate as a bytestring"
792
1864
# If not an OpenPGP certificate...
793
if (gnutls.library.functions
794
.gnutls_certificate_type_get(session._c_object)
1865
if (gnutls.library.functions.gnutls_certificate_type_get(
1866
session._c_object)
795
1867
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
796
1868
# ...do the normal thing
797
1869
return session.peer_certificate
800
1872
.gnutls_certificate_get_peers
801
1873
(session._c_object, ctypes.byref(list_size)))
802
1874
if not bool(cert_list) and list_size.value != 0:
803
raise gnutls.errors.GNUTLSError(u"error getting peer"
804
u" certificate")
1875
raise gnutls.errors.GNUTLSError("error getting peer"
1876
" certificate")
805
1877
if list_size.value == 0:
806
1878
return None
807
1879
cert = cert_list[0]
811
1883
def fingerprint(openpgp):
812
1884
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
813
1885
# New GnuTLS "datum" with the OpenPGP public key
814
datum = (gnutls.library.types
815
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
816
ctypes.POINTER
817
(ctypes.c_ubyte)),
818
ctypes.c_uint(len(openpgp))))
1886
datum = gnutls.library.types.gnutls_datum_t(
1887
ctypes.cast(ctypes.c_char_p(openpgp),
1888
ctypes.POINTER(ctypes.c_ubyte)),
1889
ctypes.c_uint(len(openpgp)))
819
1890
# New empty GnuTLS certificate
820
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
821
(gnutls.library.functions
822
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1893
ctypes.byref(crt))
823
1894
# Import the OpenPGP public key into the certificate
824
(gnutls.library.functions
825
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
826
gnutls.library.constants
827
.GNUTLS_OPENPGP_FMT_RAW))
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
828
1898
# Verify the self signature in the key
829
1899
crtverify = ctypes.c_uint()
830
(gnutls.library.functions
831
.gnutls_openpgp_crt_verify_self(crt, 0,
832
ctypes.byref(crtverify)))
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
833
1902
if crtverify.value != 0:
834
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
835
raise (gnutls.errors.CertificateSecurityError
836
(u"Verify failed"))
1904
raise gnutls.errors.CertificateSecurityError(
1905
"Verify failed")
837
1906
# New buffer for the fingerprint
838
1907
buf = ctypes.create_string_buffer(20)
839
1908
buf_len = ctypes.c_size_t()
840
1909
# Get the fingerprint from the certificate into the buffer
841
(gnutls.library.functions
842
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
843
ctypes.byref(buf_len)))
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
844
1912
# Deinit the certificate
845
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
846
1914
# Convert the buffer to a Python bytestring
847
1915
fpr = ctypes.string_at(buf, buf_len.value)
848
1916
# Convert the bytestring to hexadecimal notation
849
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1917
hex_fpr = binascii.hexlify(fpr).upper()
850
1918
return hex_fpr
851
1919
852
1920
853
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
854
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
855
856
Assumes a gobject.MainLoop event loop.
857
"""
1921
class MultiprocessingMixIn(object):
1922
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1923
1924
def sub_process_main(self, request, address):
1925
try:
1926
self.finish_request(request, address)
1927
except Exception:
1928
self.handle_error(request, address)
1929
self.close_request(request)
1930
1931
def process_request(self, request, address):
1932
"""Start a new process to process the request."""
1933
proc = multiprocessing.Process(target = self.sub_process_main,
1934
args = (request, address))
1935
proc.start()
1936
return proc
1937
1938
1939
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1940
""" adds a pipe to the MixIn """
1941
858
1942
def process_request(self, request, client_address):
859
1943
"""Overrides and wraps the original process_request().
860
1944
861
This function creates a new pipe in self.pipe
1945
This function creates a new pipe in self.pipe
862
1946
"""
863
self.pipe = os.pipe()
864
super(ForkingMixInWithPipe,
865
self).process_request(request, client_address)
866
os.close(self.pipe[1]) # close write end
867
# Call "handle_ipc" for both data and EOF events
868
gobject.io_add_watch(self.pipe[0],
869
gobject.IO_IN | gobject.IO_HUP,
870
self.handle_ipc)
871
def handle_ipc(source, condition):
1947
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1948
1949
proc = MultiprocessingMixIn.process_request(self, request,
1950
client_address)
1951
self.child_pipe.close()
1952
self.add_pipe(parent_pipe, proc)
1953
1954
def add_pipe(self, parent_pipe, proc):
872
1955
"""Dummy function; override as necessary"""
873
os.close(source)
874
return False
875
876
877
class IPv6_TCPServer(ForkingMixInWithPipe,
878
SocketServer.TCPServer, object):
1956
raise NotImplementedError()
1957
1958
1959
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1960
socketserver.TCPServer, object):
879
1961
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
880
1962
881
1963
Attributes:
882
1964
enabled: Boolean; whether this server is activated yet
883
1965
interface: None or a network interface name (string)
884
1966
use_ipv6: Boolean; to use IPv6 or not
885
----
886
clients: Set() of Client objects
887
gnutls_priority GnuTLS priority string
888
use_dbus: Boolean; to emit D-Bus signals or not
889
1967
"""
1968
890
1969
def __init__(self, server_address, RequestHandlerClass,
891
interface=None, use_ipv6=True, clients=None,
892
gnutls_priority=None, use_dbus=True):
893
self.enabled = False
1970
interface=None,
1971
use_ipv6=True,
1972
socketfd=None):
1973
"""If socketfd is set, use that file descriptor instead of
1974
creating a new one with socket.socket().
1975
"""
894
1976
self.interface = interface
895
1977
if use_ipv6:
896
1978
self.address_family = socket.AF_INET6
897
self.clients = clients
898
self.use_dbus = use_dbus
899
self.gnutls_priority = gnutls_priority
900
SocketServer.TCPServer.__init__(self, server_address,
1979
if socketfd is not None:
1980
# Save the file descriptor
1981
self.socketfd = socketfd
1982
# Save the original socket.socket() function
1983
self.socket_socket = socket.socket
1984
# To implement --socket, we monkey patch socket.socket.
1985
#
1986
# (When socketserver.TCPServer is a new-style class, we
1987
# could make self.socket into a property instead of monkey
1988
# patching socket.socket.)
1989
#
1990
# Create a one-time-only replacement for socket.socket()
1991
@functools.wraps(socket.socket)
1992
def socket_wrapper(*args, **kwargs):
1993
# Restore original function so subsequent calls are
1994
# not affected.
1995
socket.socket = self.socket_socket
1996
del self.socket_socket
1997
# This time only, return a new socket object from the
1998
# saved file descriptor.
1999
return socket.fromfd(self.socketfd, *args, **kwargs)
2000
# Replace socket.socket() function with wrapper
2001
socket.socket = socket_wrapper
2002
# The socketserver.TCPServer.__init__ will call
2003
# socket.socket(), which might be our replacement,
2004
# socket_wrapper(), if socketfd was set.
2005
socketserver.TCPServer.__init__(self, server_address,
901
2006
RequestHandlerClass)
2007
902
2008
def server_bind(self):
903
2009
"""This overrides the normal server_bind() function
904
2010
to bind to an interface if one was specified, and also NOT to
905
2011
bind to an address or port if they were not specified."""
906
2012
if self.interface is not None:
907
try:
908
self.socket.setsockopt(socket.SOL_SOCKET,
909
SO_BINDTODEVICE,
910
str(self.interface + u'\0'))
911
except socket.error, error:
912
if error[0] == errno.EPERM:
913
logger.error(u"No permission to"
914
u" bind to interface %s",
915
self.interface)
916
else:
917
raise
2013
if SO_BINDTODEVICE is None:
2014
logger.error("SO_BINDTODEVICE does not exist;"
2015
" cannot bind to interface %s",
2016
self.interface)
2017
else:
2018
try:
2019
self.socket.setsockopt(
2020
socket.SOL_SOCKET, SO_BINDTODEVICE,
2021
(self.interface + "\0").encode("utf-8"))
2022
except socket.error as error:
2023
if error.errno == errno.EPERM:
2024
logger.error("No permission to bind to"
2025
" interface %s", self.interface)
2026
elif error.errno == errno.ENOPROTOOPT:
2027
logger.error("SO_BINDTODEVICE not available;"
2028
" cannot bind to interface %s",
2029
self.interface)
2030
elif error.errno == errno.ENODEV:
2031
logger.error("Interface %s does not exist,"
2032
" cannot bind", self.interface)
2033
else:
2034
raise
918
2035
# Only bind(2) the socket if we really need to.
919
2036
if self.server_address[0] or self.server_address[1]:
920
2037
if not self.server_address[0]:
921
2038
if self.address_family == socket.AF_INET6:
922
any_address = u"::" # in6addr_any
2039
any_address = "::" # in6addr_any
923
2040
else:
924
any_address = socket.INADDR_ANY
2041
any_address = "0.0.0.0" # INADDR_ANY
925
2042
self.server_address = (any_address,
926
2043
self.server_address[1])
927
2044
elif not self.server_address[1]:
928
self.server_address = (self.server_address[0],
929
0)
2045
self.server_address = (self.server_address[0], 0)
930
2046
# if self.interface:
931
2047
# self.server_address = (self.server_address[0],
932
2048
# 0, # port
933
2049
# 0, # flowinfo
934
2050
# if_nametoindex
935
2051
# (self.interface))
936
return SocketServer.TCPServer.server_bind(self)
2052
return socketserver.TCPServer.server_bind(self)
2053
2054
2055
class MandosServer(IPv6_TCPServer):
2056
"""Mandos server.
2057
2058
Attributes:
2059
clients: set of Client objects
2060
gnutls_priority GnuTLS priority string
2061
use_dbus: Boolean; to emit D-Bus signals or not
2062
2063
Assumes a gobject.MainLoop event loop.
2064
"""
2065
2066
def __init__(self, server_address, RequestHandlerClass,
2067
interface=None,
2068
use_ipv6=True,
2069
clients=None,
2070
gnutls_priority=None,
2071
use_dbus=True,
2072
socketfd=None):
2073
self.enabled = False
2074
self.clients = clients
2075
if self.clients is None:
2076
self.clients = {}
2077
self.use_dbus = use_dbus
2078
self.gnutls_priority = gnutls_priority
2079
IPv6_TCPServer.__init__(self, server_address,
2080
RequestHandlerClass,
2081
interface = interface,
2082
use_ipv6 = use_ipv6,
2083
socketfd = socketfd)
2084
937
2085
def server_activate(self):
938
2086
if self.enabled:
939
return SocketServer.TCPServer.server_activate(self)
2087
return socketserver.TCPServer.server_activate(self)
2088
940
2089
def enable(self):
941
2090
self.enabled = True
942
def handle_ipc(self, source, condition, file_objects={}):
943
condition_names = {
944
gobject.IO_IN: u"IN", # There is data to read.
945
gobject.IO_OUT: u"OUT", # Data can be written (without
946
# blocking).
947
gobject.IO_PRI: u"PRI", # There is urgent data to read.
948
gobject.IO_ERR: u"ERR", # Error condition.
949
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
950
# broken, usually for pipes and
951
# sockets).
952
}
953
conditions_string = ' | '.join(name
954
for cond, name in
955
condition_names.iteritems()
956
if cond & condition)
957
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
958
conditions_string)
959
960
# Turn the pipe file descriptor into a Python file object
961
if source not in file_objects:
962
file_objects[source] = os.fdopen(source, u"r", 1)
963
964
# Read a line from the file object
965
cmdline = file_objects[source].readline()
966
if not cmdline: # Empty line means end of file
967
# close the IPC pipe
968
file_objects[source].close()
969
del file_objects[source]
970
971
# Stop calling this function
972
return False
973
974
logger.debug(u"IPC command: %r", cmdline)
975
976
# Parse and act on command
977
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
978
979
if cmd == u"NOTFOUND":
980
logger.warning(u"Client not found for fingerprint: %s",
981
args)
982
if self.use_dbus:
983
# Emit D-Bus signal
984
mandos_dbus_service.ClientNotFound(args)
985
elif cmd == u"INVALID":
986
for client in self.clients:
987
if client.name == args:
988
logger.warning(u"Client %s is invalid", args)
989
if self.use_dbus:
990
# Emit D-Bus signal
991
client.Rejected()
992
break
993
else:
994
logger.error(u"Unknown client %s is invalid", args)
995
elif cmd == u"SENDING":
996
for client in self.clients:
997
if client.name == args:
998
logger.info(u"Sending secret to %s", client.name)
999
client.checked_ok()
1000
if self.use_dbus:
1001
# Emit D-Bus signal
1002
client.ReceivedSecret()
1003
break
1004
else:
1005
logger.error(u"Sending secret to unknown client %s",
1006
args)
2091
2092
def add_pipe(self, parent_pipe, proc):
2093
# Call "handle_ipc" for both data and EOF events
2094
gobject.io_add_watch(
2095
parent_pipe.fileno(),
2096
gobject.IO_IN | gobject.IO_HUP,
2097
functools.partial(self.handle_ipc,
2098
parent_pipe = parent_pipe,
2099
proc = proc))
2100
2101
def handle_ipc(self, source, condition,
2102
parent_pipe=None,
2103
proc = None,
2104
client_object=None):
2105
# error, or the other end of multiprocessing.Pipe has closed
2106
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2107
# Wait for other process to exit
2108
proc.join()
2109
return False
2110
2111
# Read a request from the child
2112
request = parent_pipe.recv()
2113
command = request[0]
2114
2115
if command == 'init':
2116
fpr = request[1]
2117
address = request[2]
2118
2119
for c in self.clients.itervalues():
2120
if c.fingerprint == fpr:
2121
client = c
2122
break
2123
else:
2124
logger.info("Client not found for fingerprint: %s, ad"
2125
"dress: %s", fpr, address)
2126
if self.use_dbus:
2127
# Emit D-Bus signal
2128
mandos_dbus_service.ClientNotFound(fpr,
2129
address[0])
2130
parent_pipe.send(False)
2131
return False
2132
2133
gobject.io_add_watch(
2134
parent_pipe.fileno(),
2135
gobject.IO_IN | gobject.IO_HUP,
2136
functools.partial(self.handle_ipc,
2137
parent_pipe = parent_pipe,
2138
proc = proc,
2139
client_object = client))
2140
parent_pipe.send(True)
2141
# remove the old hook in favor of the new above hook on
2142
# same fileno
2143
return False
2144
if command == 'funcall':
2145
funcname = request[1]
2146
args = request[2]
2147
kwargs = request[3]
2148
2149
parent_pipe.send(('data', getattr(client_object,
2150
funcname)(*args,
2151
**kwargs)))
2152
2153
if command == 'getattr':
2154
attrname = request[1]
2155
if isinstance(client_object.__getattribute__(attrname),
2156
collections.Callable):
2157
parent_pipe.send(('function', ))
2158
else:
2159
parent_pipe.send((
2160
'data', client_object.__getattribute__(attrname)))
2161
2162
if command == 'setattr':
2163
attrname = request[1]
2164
value = request[2]
2165
setattr(client_object, attrname, value)
2166
2167
return True
2168
2169
2170
def rfc3339_duration_to_delta(duration):
2171
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2172
2173
>>> rfc3339_duration_to_delta("P7D")
2174
datetime.timedelta(7)
2175
>>> rfc3339_duration_to_delta("PT60S")
2176
datetime.timedelta(0, 60)
2177
>>> rfc3339_duration_to_delta("PT60M")
2178
datetime.timedelta(0, 3600)
2179
>>> rfc3339_duration_to_delta("PT24H")
2180
datetime.timedelta(1)
2181
>>> rfc3339_duration_to_delta("P1W")
2182
datetime.timedelta(7)
2183
>>> rfc3339_duration_to_delta("PT5M30S")
2184
datetime.timedelta(0, 330)
2185
>>> rfc3339_duration_to_delta("P1DT3M20S")
2186
datetime.timedelta(1, 200)
2187
"""
2188
2189
# Parsing an RFC 3339 duration with regular expressions is not
2190
# possible - there would have to be multiple places for the same
2191
# values, like seconds. The current code, while more esoteric, is
2192
# cleaner without depending on a parsing library. If Python had a
2193
# built-in library for parsing we would use it, but we'd like to
2194
# avoid excessive use of external libraries.
2195
2196
# New type for defining tokens, syntax, and semantics all-in-one
2197
Token = collections.namedtuple("Token", (
2198
"regexp", # To match token; if "value" is not None, must have
2199
# a "group" containing digits
2200
"value", # datetime.timedelta or None
2201
"followers")) # Tokens valid after this token
2202
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2203
# the "duration" ABNF definition in RFC 3339, Appendix A.
2204
token_end = Token(re.compile(r"$"), None, frozenset())
2205
token_second = Token(re.compile(r"(\d+)S"),
2206
datetime.timedelta(seconds=1),
2207
frozenset((token_end, )))
2208
token_minute = Token(re.compile(r"(\d+)M"),
2209
datetime.timedelta(minutes=1),
2210
frozenset((token_second, token_end)))
2211
token_hour = Token(re.compile(r"(\d+)H"),
2212
datetime.timedelta(hours=1),
2213
frozenset((token_minute, token_end)))
2214
token_time = Token(re.compile(r"T"),
2215
None,
2216
frozenset((token_hour, token_minute,
2217
token_second)))
2218
token_day = Token(re.compile(r"(\d+)D"),
2219
datetime.timedelta(days=1),
2220
frozenset((token_time, token_end)))
2221
token_month = Token(re.compile(r"(\d+)M"),
2222
datetime.timedelta(weeks=4),
2223
frozenset((token_day, token_end)))
2224
token_year = Token(re.compile(r"(\d+)Y"),
2225
datetime.timedelta(weeks=52),
2226
frozenset((token_month, token_end)))
2227
token_week = Token(re.compile(r"(\d+)W"),
2228
datetime.timedelta(weeks=1),
2229
frozenset((token_end, )))
2230
token_duration = Token(re.compile(r"P"), None,
2231
frozenset((token_year, token_month,
2232
token_day, token_time,
2233
token_week)))
2234
# Define starting values
2235
value = datetime.timedelta() # Value so far
2236
found_token = None
2237
followers = frozenset((token_duration, )) # Following valid tokens
2238
s = duration # String left to parse
2239
# Loop until end token is found
2240
while found_token is not token_end:
2241
# Search for any currently valid tokens
2242
for token in followers:
2243
match = token.regexp.match(s)
2244
if match is not None:
2245
# Token found
2246
if token.value is not None:
2247
# Value found, parse digits
2248
factor = int(match.group(1), 10)
2249
# Add to value so far
2250
value += factor * token.value
2251
# Strip token from string
2252
s = token.regexp.sub("", s, 1)
2253
# Go to found token
2254
found_token = token
2255
# Set valid next tokens
2256
followers = found_token.followers
2257
break
1007
2258
else:
1008
logger.error(u"Unknown IPC command: %r", cmdline)
1009
1010
# Keep calling this function
1011
return True
2259
# No currently valid tokens were found
2260
raise ValueError("Invalid RFC 3339 duration: {!r}"
2261
.format(duration))
2262
# End token found
2263
return value
1012
2264
1013
2265
1014
2266
def string_to_delta(interval):
1015
2267
"""Parse a string and return a datetime.timedelta
1016
2268
1017
>>> string_to_delta(u'7d')
2269
>>> string_to_delta('7d')
1018
2270
datetime.timedelta(7)
1019
>>> string_to_delta(u'60s')
2271
>>> string_to_delta('60s')
1020
2272
datetime.timedelta(0, 60)
1021
>>> string_to_delta(u'60m')
2273
>>> string_to_delta('60m')
1022
2274
datetime.timedelta(0, 3600)
1023
>>> string_to_delta(u'24h')
2275
>>> string_to_delta('24h')
1024
2276
datetime.timedelta(1)
1025
>>> string_to_delta(u'1w')
2277
>>> string_to_delta('1w')
1026
2278
datetime.timedelta(7)
1027
>>> string_to_delta(u'5m 30s')
2279
>>> string_to_delta('5m 30s')
1028
2280
datetime.timedelta(0, 330)
1029
2281
"""
2282
2283
try:
2284
return rfc3339_duration_to_delta(interval)
2285
except ValueError:
2286
pass
2287
1030
2288
timevalue = datetime.timedelta(0)
1031
2289
for s in interval.split():
1032
2290
try:
1033
suffix = unicode(s[-1])
2291
suffix = s[-1]
1034
2292
value = int(s[:-1])
1035
if suffix == u"d":
2293
if suffix == "d":
1036
2294
delta = datetime.timedelta(value)
1037
elif suffix == u"s":
2295
elif suffix == "s":
1038
2296
delta = datetime.timedelta(0, value)
1039
elif suffix == u"m":
2297
elif suffix == "m":
1040
2298
delta = datetime.timedelta(0, 0, 0, 0, value)
1041
elif suffix == u"h":
2299
elif suffix == "h":
1042
2300
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1043
elif suffix == u"w":
2301
elif suffix == "w":
1044
2302
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1045
2303
else:
1046
raise ValueError
1047
except (ValueError, IndexError):
1048
raise ValueError
2304
raise ValueError("Unknown suffix {!r}".format(suffix))
2305
except IndexError as e:
2306
raise ValueError(*(e.args))
1049
2307
timevalue += delta
1050
2308
return timevalue
1051
2309
1052
2310
1053
def server_state_changed(state):
1054
"""Derived from the Avahi example code"""
1055
if state == avahi.SERVER_COLLISION:
1056
logger.error(u"Zeroconf server name collision")
1057
service.remove()
1058
elif state == avahi.SERVER_RUNNING:
1059
service.add()
1060
1061
1062
def entry_group_state_changed(state, error):
1063
"""Derived from the Avahi example code"""
1064
logger.debug(u"Avahi state change: %i", state)
1065
1066
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1067
logger.debug(u"Zeroconf service established.")
1068
elif state == avahi.ENTRY_GROUP_COLLISION:
1069
logger.warning(u"Zeroconf service name collision.")
1070
service.rename()
1071
elif state == avahi.ENTRY_GROUP_FAILURE:
1072
logger.critical(u"Avahi: Error in group state changed %s",
1073
unicode(error))
1074
raise AvahiGroupError(u"State changed: %s" % unicode(error))
1075
1076
def if_nametoindex(interface):
1077
"""Call the C function if_nametoindex(), or equivalent
1078
1079
Note: This function cannot accept a unicode string."""
1080
global if_nametoindex
1081
try:
1082
if_nametoindex = (ctypes.cdll.LoadLibrary
1083
(ctypes.util.find_library(u"c"))
1084
.if_nametoindex)
1085
except (OSError, AttributeError):
1086
logger.warning(u"Doing if_nametoindex the hard way")
1087
def if_nametoindex(interface):
1088
"Get an interface index the hard way, i.e. using fcntl()"
1089
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1090
with closing(socket.socket()) as s:
1091
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1092
struct.pack(str(u"16s16x"),
1093
interface))
1094
interface_index = struct.unpack(str(u"I"),
1095
ifreq[16:20])[0]
1096
return interface_index
1097
return if_nametoindex(interface)
1098
1099
1100
2311
def daemon(nochdir = False, noclose = False):
1101
2312
"""See daemon(3). Standard BSD Unix function.
1102
2313
1105
2316
sys.exit()
1106
2317
os.setsid()
1107
2318
if not nochdir:
1108
os.chdir(u"/")
2319
os.chdir("/")
1109
2320
if os.fork():
1110
2321
sys.exit()
1111
2322
if not noclose:
1112
2323
# Close all standard open file descriptors
1113
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2324
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1114
2325
if not stat.S_ISCHR(os.fstat(null).st_mode):
1115
2326
raise OSError(errno.ENODEV,
1116
u"/dev/null not a character device")
2327
"{} not a character device"
2328
.format(os.devnull))
1117
2329
os.dup2(null, sys.stdin.fileno())
1118
2330
os.dup2(null, sys.stdout.fileno())
1119
2331
os.dup2(null, sys.stderr.fileno())
1123
2335
1124
2336
def main():
1125
2337
1126
######################################################################
2338
##################################################################
1127
2339
# Parsing of options, both command line and config file
1128
2340
1129
parser = optparse.OptionParser(version = "%%prog %s" % version)
1130
parser.add_option("-i", u"--interface", type=u"string",
1131
metavar="IF", help=u"Bind to interface IF")
1132
parser.add_option("-a", u"--address", type=u"string",
1133
help=u"Address to listen for requests on")
1134
parser.add_option("-p", u"--port", type=u"int",
1135
help=u"Port number to receive requests on")
1136
parser.add_option("--check", action=u"store_true",
1137
help=u"Run self-test")
1138
parser.add_option("--debug", action=u"store_true",
1139
help=u"Debug mode; run in foreground and log to"
1140
u" terminal")
1141
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1142
u" priority string (see GnuTLS documentation)")
1143
parser.add_option("--servicename", type=u"string",
1144
metavar=u"NAME", help=u"Zeroconf service name")
1145
parser.add_option("--configdir", type=u"string",
1146
default=u"/etc/mandos", metavar=u"DIR",
1147
help=u"Directory to search for configuration"
1148
u" files")
1149
parser.add_option("--no-dbus", action=u"store_false",
1150
dest=u"use_dbus", help=u"Do not provide D-Bus"
1151
u" system bus interface")
1152
parser.add_option("--no-ipv6", action=u"store_false",
1153
dest=u"use_ipv6", help=u"Do not use IPv6")
1154
options = parser.parse_args()[0]
2341
parser = argparse.ArgumentParser()
2342
parser.add_argument("-v", "--version", action="version",
2343
version = "%(prog)s {}".format(version),
2344
help="show version number and exit")
2345
parser.add_argument("-i", "--interface", metavar="IF",
2346
help="Bind to interface IF")
2347
parser.add_argument("-a", "--address",
2348
help="Address to listen for requests on")
2349
parser.add_argument("-p", "--port", type=int,
2350
help="Port number to receive requests on")
2351
parser.add_argument("--check", action="store_true",
2352
help="Run self-test")
2353
parser.add_argument("--debug", action="store_true",
2354
help="Debug mode; run in foreground and log"
2355
" to terminal", default=None)
2356
parser.add_argument("--debuglevel", metavar="LEVEL",
2357
help="Debug level for stdout output")
2358
parser.add_argument("--priority", help="GnuTLS"
2359
" priority string (see GnuTLS documentation)")
2360
parser.add_argument("--servicename",
2361
metavar="NAME", help="Zeroconf service name")
2362
parser.add_argument("--configdir",
2363
default="/etc/mandos", metavar="DIR",
2364
help="Directory to search for configuration"
2365
" files")
2366
parser.add_argument("--no-dbus", action="store_false",
2367
dest="use_dbus", help="Do not provide D-Bus"
2368
" system bus interface", default=None)
2369
parser.add_argument("--no-ipv6", action="store_false",
2370
dest="use_ipv6", help="Do not use IPv6",
2371
default=None)
2372
parser.add_argument("--no-restore", action="store_false",
2373
dest="restore", help="Do not restore stored"
2374
" state", default=None)
2375
parser.add_argument("--socket", type=int,
2376
help="Specify a file descriptor to a network"
2377
" socket to use instead of creating one")
2378
parser.add_argument("--statedir", metavar="DIR",
2379
help="Directory to save/restore state in")
2380
parser.add_argument("--foreground", action="store_true",
2381
help="Run in foreground", default=None)
2382
parser.add_argument("--no-zeroconf", action="store_false",
2383
dest="zeroconf", help="Do not use Zeroconf",
2384
default=None)
2385
2386
options = parser.parse_args()
1155
2387
1156
2388
if options.check:
1157
2389
import doctest
1158
doctest.testmod()
1159
sys.exit()
2390
fail_count, test_count = doctest.testmod()
2391
sys.exit(os.EX_OK if fail_count == 0 else 1)
1160
2392
1161
2393
# Default values for config file for server-global settings
1162
server_defaults = { u"interface": u"",
1163
u"address": u"",
1164
u"port": u"",
1165
u"debug": u"False",
1166
u"priority":
1167
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1168
u"servicename": u"Mandos",
1169
u"use_dbus": u"True",
1170
u"use_ipv6": u"True",
1171
}
2394
server_defaults = { "interface": "",
2395
"address": "",
2396
"port": "",
2397
"debug": "False",
2398
"priority":
2399
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2400
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2401
"servicename": "Mandos",
2402
"use_dbus": "True",
2403
"use_ipv6": "True",
2404
"debuglevel": "",
2405
"restore": "True",
2406
"socket": "",
2407
"statedir": "/var/lib/mandos",
2408
"foreground": "False",
2409
"zeroconf": "True",
2410
}
1172
2411
1173
2412
# Parse config file for server-global settings
1174
server_config = ConfigParser.SafeConfigParser(server_defaults)
2413
server_config = configparser.SafeConfigParser(server_defaults)
1175
2414
del server_defaults
1176
server_config.read(os.path.join(options.configdir,
1177
u"mandos.conf"))
2415
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1178
2416
# Convert the SafeConfigParser object to a dict
1179
2417
server_settings = server_config.defaults()
1180
2418
# Use the appropriate methods on the non-string config options
1181
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1182
server_settings[option] = server_config.getboolean(u"DEFAULT",
2419
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2420
server_settings[option] = server_config.getboolean("DEFAULT",
1183
2421
option)
1184
2422
if server_settings["port"]:
1185
server_settings["port"] = server_config.getint(u"DEFAULT",
1186
u"port")
2423
server_settings["port"] = server_config.getint("DEFAULT",
2424
"port")
2425
if server_settings["socket"]:
2426
server_settings["socket"] = server_config.getint("DEFAULT",
2427
"socket")
2428
# Later, stdin will, and stdout and stderr might, be dup'ed
2429
# over with an opened os.devnull. But we don't want this to
2430
# happen with a supplied network socket.
2431
if 0 <= server_settings["socket"] <= 2:
2432
server_settings["socket"] = os.dup(server_settings
2433
["socket"])
1187
2434
del server_config
1188
2435
1189
2436
# Override the settings from the config file with command line
1190
2437
# options, if set.
1191
for option in (u"interface", u"address", u"port", u"debug",
1192
u"priority", u"servicename", u"configdir",
1193
u"use_dbus", u"use_ipv6"):
2438
for option in ("interface", "address", "port", "debug",
2439
"priority", "servicename", "configdir", "use_dbus",
2440
"use_ipv6", "debuglevel", "restore", "statedir",
2441
"socket", "foreground", "zeroconf"):
1194
2442
value = getattr(options, option)
1195
2443
if value is not None:
1196
2444
server_settings[option] = value
1197
2445
del options
1198
2446
# Force all strings to be unicode
1199
2447
for option in server_settings.keys():
1200
if type(server_settings[option]) is str:
1201
server_settings[option] = unicode(server_settings[option])
2448
if isinstance(server_settings[option], bytes):
2449
server_settings[option] = (server_settings[option]
2450
.decode("utf-8"))
2451
# Force all boolean options to be boolean
2452
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2453
"foreground", "zeroconf"):
2454
server_settings[option] = bool(server_settings[option])
2455
# Debug implies foreground
2456
if server_settings["debug"]:
2457
server_settings["foreground"] = True
1202
2458
# Now we have our good server settings in "server_settings"
1203
2459
1204
2460
##################################################################
1205
2461
2462
if (not server_settings["zeroconf"]
2463
and not (server_settings["port"]
2464
or server_settings["socket"] != "")):
2465
parser.error("Needs port or socket to work without Zeroconf")
2466
1206
2467
# For convenience
1207
debug = server_settings[u"debug"]
1208
use_dbus = server_settings[u"use_dbus"]
1209
use_ipv6 = server_settings[u"use_ipv6"]
1210
1211
if not debug:
1212
syslogger.setLevel(logging.WARNING)
1213
console.setLevel(logging.WARNING)
1214
1215
if server_settings[u"servicename"] != u"Mandos":
1216
syslogger.setFormatter(logging.Formatter
1217
(u'Mandos (%s) [%%(process)d]:'
1218
u' %%(levelname)s: %%(message)s'
1219
% server_settings[u"servicename"]))
2468
debug = server_settings["debug"]
2469
debuglevel = server_settings["debuglevel"]
2470
use_dbus = server_settings["use_dbus"]
2471
use_ipv6 = server_settings["use_ipv6"]
2472
stored_state_path = os.path.join(server_settings["statedir"],
2473
stored_state_file)
2474
foreground = server_settings["foreground"]
2475
zeroconf = server_settings["zeroconf"]
2476
2477
if debug:
2478
initlogger(debug, logging.DEBUG)
2479
else:
2480
if not debuglevel:
2481
initlogger(debug)
2482
else:
2483
level = getattr(logging, debuglevel.upper())
2484
initlogger(debug, level)
2485
2486
if server_settings["servicename"] != "Mandos":
2487
syslogger.setFormatter(
2488
logging.Formatter('Mandos ({}) [%(process)d]:'
2489
' %(levelname)s: %(message)s'.format(
2490
server_settings["servicename"])))
1220
2491
1221
2492
# Parse config file with clients
1222
client_defaults = { u"timeout": u"1h",
1223
u"interval": u"5m",
1224
u"checker": u"fping -q -- %%(host)s",
1225
u"host": u"",
1226
}
1227
client_config = ConfigParser.SafeConfigParser(client_defaults)
1228
client_config.read(os.path.join(server_settings[u"configdir"],
1229
u"clients.conf"))
2493
client_config = configparser.SafeConfigParser(Client
2494
.client_defaults)
2495
client_config.read(os.path.join(server_settings["configdir"],
2496
"clients.conf"))
1230
2497
1231
2498
global mandos_dbus_service
1232
2499
mandos_dbus_service = None
1233
2500
1234
clients = Set()
1235
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1236
server_settings[u"port"]),
1237
ClientHandler,
1238
interface=
1239
server_settings[u"interface"],
1240
use_ipv6=use_ipv6,
1241
clients=clients,
1242
gnutls_priority=
1243
server_settings[u"priority"],
1244
use_dbus=use_dbus)
1245
pidfilename = u"/var/run/mandos.pid"
1246
try:
1247
pidfile = open(pidfilename, u"w")
1248
except IOError:
1249
logger.error(u"Could not open file %r", pidfilename)
2501
socketfd = None
2502
if server_settings["socket"] != "":
2503
socketfd = server_settings["socket"]
2504
tcp_server = MandosServer(
2505
(server_settings["address"], server_settings["port"]),
2506
ClientHandler,
2507
interface=(server_settings["interface"] or None),
2508
use_ipv6=use_ipv6,
2509
gnutls_priority=server_settings["priority"],
2510
use_dbus=use_dbus,
2511
socketfd=socketfd)
2512
if not foreground:
2513
pidfilename = "/run/mandos.pid"
2514
if not os.path.isdir("/run/."):
2515
pidfilename = "/var/run/mandos.pid"
2516
pidfile = None
2517
try:
2518
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2519
except IOError as e:
2520
logger.error("Could not open file %r", pidfilename,
2521
exc_info=e)
1250
2522
1251
try:
1252
uid = pwd.getpwnam(u"_mandos").pw_uid
1253
gid = pwd.getpwnam(u"_mandos").pw_gid
1254
except KeyError:
2523
for name in ("_mandos", "mandos", "nobody"):
1255
2524
try:
1256
uid = pwd.getpwnam(u"mandos").pw_uid
1257
gid = pwd.getpwnam(u"mandos").pw_gid
2525
uid = pwd.getpwnam(name).pw_uid
2526
gid = pwd.getpwnam(name).pw_gid
2527
break
1258
2528
except KeyError:
1259
try:
1260
uid = pwd.getpwnam(u"nobody").pw_uid
1261
gid = pwd.getpwnam(u"nobody").pw_gid
1262
except KeyError:
1263
uid = 65534
1264
gid = 65534
2529
continue
2530
else:
2531
uid = 65534
2532
gid = 65534
1265
2533
try:
1266
2534
os.setgid(gid)
1267
2535
os.setuid(uid)
1268
except OSError, error:
1269
if error[0] != errno.EPERM:
1270
raise error
2536
except OSError as error:
2537
if error.errno != errno.EPERM:
2538
raise
1271
2539
1272
# Enable all possible GnuTLS debugging
1273
2540
if debug:
2541
# Enable all possible GnuTLS debugging
2542
1274
2543
# "Use a log level over 10 to enable all debugging options."
1275
2544
# - GnuTLS manual
1276
2545
gnutls.library.functions.gnutls_global_set_log_level(11)
1277
2546
1278
2547
@gnutls.library.types.gnutls_log_func
1279
2548
def debug_gnutls(level, string):
1280
logger.debug(u"GnuTLS: %s", string[:-1])
1281
1282
(gnutls.library.functions
1283
.gnutls_global_set_log_function(debug_gnutls))
1284
1285
global service
1286
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1287
service = AvahiService(name = server_settings[u"servicename"],
1288
servicetype = u"_mandos._tcp",
1289
protocol = protocol)
1290
if server_settings["interface"]:
1291
service.interface = (if_nametoindex
1292
(str(server_settings[u"interface"])))
2549
logger.debug("GnuTLS: %s", string[:-1])
2550
2551
gnutls.library.functions.gnutls_global_set_log_function(
2552
debug_gnutls)
2553
2554
# Redirect stdin so all checkers get /dev/null
2555
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2556
os.dup2(null, sys.stdin.fileno())
2557
if null > 2:
2558
os.close(null)
2559
2560
# Need to fork before connecting to D-Bus
2561
if not foreground:
2562
# Close all input and output, do double fork, etc.
2563
daemon()
2564
2565
# multiprocessing will use threads, so before we use gobject we
2566
# need to inform gobject that threads will be used.
2567
gobject.threads_init()
1293
2568
1294
2569
global main_loop
1295
global bus
1296
global server
1297
2570
# From the Avahi example code
1298
DBusGMainLoop(set_as_default=True )
2571
DBusGMainLoop(set_as_default=True)
1299
2572
main_loop = gobject.MainLoop()
1300
2573
bus = dbus.SystemBus()
1301
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1302
avahi.DBUS_PATH_SERVER),
1303
avahi.DBUS_INTERFACE_SERVER)
1304
2574
# End of Avahi example code
1305
2575
if use_dbus:
1306
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2576
try:
2577
bus_name = dbus.service.BusName("se.recompile.Mandos",
2578
bus,
2579
do_not_queue=True)
2580
old_bus_name = dbus.service.BusName(
2581
"se.bsnet.fukt.Mandos", bus,
2582
do_not_queue=True)
2583
except dbus.exceptions.DBusException as e:
2584
logger.error("Disabling D-Bus:", exc_info=e)
2585
use_dbus = False
2586
server_settings["use_dbus"] = False
2587
tcp_server.use_dbus = False
2588
if zeroconf:
2589
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2590
service = AvahiServiceToSyslog(
2591
name = server_settings["servicename"],
2592
servicetype = "_mandos._tcp",
2593
protocol = protocol,
2594
bus = bus)
2595
if server_settings["interface"]:
2596
service.interface = if_nametoindex(
2597
server_settings["interface"].encode("utf-8"))
2598
2599
global multiprocessing_manager
2600
multiprocessing_manager = multiprocessing.Manager()
1307
2601
1308
2602
client_class = Client
1309
2603
if use_dbus:
1310
client_class = ClientDBus
1311
clients.update(Set(
1312
client_class(name = section,
1313
config= dict(client_config.items(section)))
1314
for section in client_config.sections()))
1315
if not clients:
1316
logger.warning(u"No clients defined")
1317
1318
if debug:
1319
# Redirect stdin so all checkers get /dev/null
1320
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1321
os.dup2(null, sys.stdin.fileno())
1322
if null > 2:
1323
os.close(null)
1324
else:
1325
# No console logging
1326
logger.removeHandler(console)
1327
# Close all input and output, do double fork, etc.
1328
daemon()
1329
1330
try:
1331
with closing(pidfile):
2604
client_class = functools.partial(ClientDBus, bus = bus)
2605
2606
client_settings = Client.config_parser(client_config)
2607
old_client_settings = {}
2608
clients_data = {}
2609
2610
# This is used to redirect stdout and stderr for checker processes
2611
global wnull
2612
wnull = open(os.devnull, "w") # A writable /dev/null
2613
# Only used if server is running in foreground but not in debug
2614
# mode
2615
if debug or not foreground:
2616
wnull.close()
2617
2618
# Get client data and settings from last running state.
2619
if server_settings["restore"]:
2620
try:
2621
with open(stored_state_path, "rb") as stored_state:
2622
clients_data, old_client_settings = pickle.load(
2623
stored_state)
2624
os.remove(stored_state_path)
2625
except IOError as e:
2626
if e.errno == errno.ENOENT:
2627
logger.warning("Could not load persistent state:"
2628
" {}".format(os.strerror(e.errno)))
2629
else:
2630
logger.critical("Could not load persistent state:",
2631
exc_info=e)
2632
raise
2633
except EOFError as e:
2634
logger.warning("Could not load persistent state: "
2635
"EOFError:",
2636
exc_info=e)
2637
2638
with PGPEngine() as pgp:
2639
for client_name, client in clients_data.items():
2640
# Skip removed clients
2641
if client_name not in client_settings:
2642
continue
2643
2644
# Decide which value to use after restoring saved state.
2645
# We have three different values: Old config file,
2646
# new config file, and saved state.
2647
# New config value takes precedence if it differs from old
2648
# config value, otherwise use saved state.
2649
for name, value in client_settings[client_name].items():
2650
try:
2651
# For each value in new config, check if it
2652
# differs from the old config value (Except for
2653
# the "secret" attribute)
2654
if (name != "secret"
2655
and (value !=
2656
old_client_settings[client_name][name])):
2657
client[name] = value
2658
except KeyError:
2659
pass
2660
2661
# Clients who has passed its expire date can still be
2662
# enabled if its last checker was successful. A Client
2663
# whose checker succeeded before we stored its state is
2664
# assumed to have successfully run all checkers during
2665
# downtime.
2666
if client["enabled"]:
2667
if datetime.datetime.utcnow() >= client["expires"]:
2668
if not client["last_checked_ok"]:
2669
logger.warning(
2670
"disabling client {} - Client never "
2671
"performed a successful checker".format(
2672
client_name))
2673
client["enabled"] = False
2674
elif client["last_checker_status"] != 0:
2675
logger.warning(
2676
"disabling client {} - Client last"
2677
" checker failed with error code"
2678
" {}".format(
2679
client_name,
2680
client["last_checker_status"]))
2681
client["enabled"] = False
2682
else:
2683
client["expires"] = (
2684
datetime.datetime.utcnow()
2685
+ client["timeout"])
2686
logger.debug("Last checker succeeded,"
2687
" keeping {} enabled".format(
2688
client_name))
2689
try:
2690
client["secret"] = pgp.decrypt(
2691
client["encrypted_secret"],
2692
client_settings[client_name]["secret"])
2693
except PGPError:
2694
# If decryption fails, we use secret from new settings
2695
logger.debug("Failed to decrypt {} old secret".format(
2696
client_name))
2697
client["secret"] = (client_settings[client_name]
2698
["secret"])
2699
2700
# Add/remove clients based on new changes made to config
2701
for client_name in (set(old_client_settings)
2702
- set(client_settings)):
2703
del clients_data[client_name]
2704
for client_name in (set(client_settings)
2705
- set(old_client_settings)):
2706
clients_data[client_name] = client_settings[client_name]
2707
2708
# Create all client objects
2709
for client_name, client in clients_data.items():
2710
tcp_server.clients[client_name] = client_class(
2711
name = client_name,
2712
settings = client,
2713
server_settings = server_settings)
2714
2715
if not tcp_server.clients:
2716
logger.warning("No clients defined")
2717
2718
if not foreground:
2719
if pidfile is not None:
1332
2720
pid = os.getpid()
1333
pidfile.write(str(pid) + "\n")
2721
try:
2722
with pidfile:
2723
print(pid, file=pidfile)
2724
except IOError:
2725
logger.error("Could not write to file %r with PID %d",
2726
pidfilename, pid)
1334
2727
del pidfile
1335
except IOError:
1336
logger.error(u"Could not write to file %r with PID %d",
1337
pidfilename, pid)
1338
except NameError:
1339
# "pidfile" was never created
1340
pass
1341
del pidfilename
1342
1343
def cleanup():
1344
"Cleanup function; run on exit"
1345
global group
1346
# From the Avahi example code
1347
if not group is None:
1348
group.Free()
1349
group = None
1350
# End of Avahi example code
1351
1352
while clients:
1353
client = clients.pop()
1354
client.disable_hook = None
1355
client.disable()
1356
1357
atexit.register(cleanup)
1358
1359
if not debug:
1360
signal.signal(signal.SIGINT, signal.SIG_IGN)
2728
del pidfilename
2729
1361
2730
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1362
2731
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1363
2732
1364
2733
if use_dbus:
1365
class MandosDBusService(dbus.service.Object):
2734
2735
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2737
class MandosDBusService(DBusObjectWithProperties):
1366
2738
"""A D-Bus proxy object"""
2739
1367
2740
def __init__(self):
1368
dbus.service.Object.__init__(self, bus, u"/")
1369
_interface = u"se.bsnet.fukt.Mandos"
1370
1371
@dbus.service.signal(_interface, signature=u"oa{sv}")
1372
def ClientAdded(self, objpath, properties):
1373
"D-Bus signal"
1374
pass
1375
1376
@dbus.service.signal(_interface, signature=u"s")
1377
def ClientNotFound(self, fingerprint):
1378
"D-Bus signal"
1379
pass
1380
1381
@dbus.service.signal(_interface, signature=u"os")
2741
dbus.service.Object.__init__(self, bus, "/")
2742
2743
_interface = "se.recompile.Mandos"
2744
2745
@dbus_interface_annotations(_interface)
2746
def _foo(self):
2747
return {
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2749
"false" }
2750
2751
@dbus.service.signal(_interface, signature="o")
2752
def ClientAdded(self, objpath):
2753
"D-Bus signal"
2754
pass
2755
2756
@dbus.service.signal(_interface, signature="ss")
2757
def ClientNotFound(self, fingerprint, address):
2758
"D-Bus signal"
2759
pass
2760
2761
@dbus.service.signal(_interface, signature="os")
1382
2762
def ClientRemoved(self, objpath, name):
1383
2763
"D-Bus signal"
1384
2764
pass
1385
2765
1386
@dbus.service.method(_interface, out_signature=u"ao")
2766
@dbus.service.method(_interface, out_signature="ao")
1387
2767
def GetAllClients(self):
1388
2768
"D-Bus method"
1389
return dbus.Array(c.dbus_object_path for c in clients)
2769
return dbus.Array(c.dbus_object_path for c in
2770
tcp_server.clients.itervalues())
1390
2771
1391
2772
@dbus.service.method(_interface,
1392
out_signature=u"a{oa{sv}}")
2773
out_signature="a{oa{sv}}")
1393
2774
def GetAllClientsWithProperties(self):
1394
2775
"D-Bus method"
1395
2776
return dbus.Dictionary(
1396
((c.dbus_object_path, c.GetAllProperties())
1397
for c in clients),
1398
signature=u"oa{sv}")
2777
{ c.dbus_object_path: c.GetAll("")
2778
for c in tcp_server.clients.itervalues() },
2779
signature="oa{sv}")
1399
2780
1400
@dbus.service.method(_interface, in_signature=u"o")
2781
@dbus.service.method(_interface, in_signature="o")
1401
2782
def RemoveClient(self, object_path):
1402
2783
"D-Bus method"
1403
for c in clients:
2784
for c in tcp_server.clients.itervalues():
1404
2785
if c.dbus_object_path == object_path:
1405
clients.remove(c)
2786
del tcp_server.clients[c.name]
1406
2787
c.remove_from_connection()
1407
2788
# Don't signal anything except ClientRemoved
1408
c.disable(signal=False)
2789
c.disable(quiet=True)
1409
2790
# Emit D-Bus signal
1410
2791
self.ClientRemoved(object_path, c.name)
1411
2792
return
1412
raise KeyError
2793
raise KeyError(object_path)
1413
2794
1414
2795
del _interface
1415
2796
1416
2797
mandos_dbus_service = MandosDBusService()
1417
2798
1418
for client in clients:
2799
def cleanup():
2800
"Cleanup function; run on exit"
2801
if zeroconf:
2802
service.cleanup()
2803
2804
multiprocessing.active_children()
2805
wnull.close()
2806
if not (tcp_server.clients or client_settings):
2807
return
2808
2809
# Store client before exiting. Secrets are encrypted with key
2810
# based on what config file has. If config file is
2811
# removed/edited, old secret will thus be unrecovable.
2812
clients = {}
2813
with PGPEngine() as pgp:
2814
for client in tcp_server.clients.itervalues():
2815
key = client_settings[client.name]["secret"]
2816
client.encrypted_secret = pgp.encrypt(client.secret,
2817
key)
2818
client_dict = {}
2819
2820
# A list of attributes that can not be pickled
2821
# + secret.
2822
exclude = { "bus", "changedstate", "secret",
2823
"checker", "server_settings" }
2824
for name, typ in inspect.getmembers(dbus.service
2825
.Object):
2826
exclude.add(name)
2827
2828
client_dict["encrypted_secret"] = (client
2829
.encrypted_secret)
2830
for attr in client.client_structure:
2831
if attr not in exclude:
2832
client_dict[attr] = getattr(client, attr)
2833
2834
clients[client.name] = client_dict
2835
del client_settings[client.name]["secret"]
2836
2837
try:
2838
with tempfile.NamedTemporaryFile(
2839
mode='wb',
2840
suffix=".pickle",
2841
prefix='clients-',
2842
dir=os.path.dirname(stored_state_path),
2843
delete=False) as stored_state:
2844
pickle.dump((clients, client_settings), stored_state)
2845
tempname = stored_state.name
2846
os.rename(tempname, stored_state_path)
2847
except (IOError, OSError) as e:
2848
if not debug:
2849
try:
2850
os.remove(tempname)
2851
except NameError:
2852
pass
2853
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2854
logger.warning("Could not save persistent state: {}"
2855
.format(os.strerror(e.errno)))
2856
else:
2857
logger.warning("Could not save persistent state:",
2858
exc_info=e)
2859
raise
2860
2861
# Delete all clients, and settings from config
2862
while tcp_server.clients:
2863
name, client = tcp_server.clients.popitem()
2864
if use_dbus:
2865
client.remove_from_connection()
2866
# Don't signal anything except ClientRemoved
2867
client.disable(quiet=True)
2868
if use_dbus:
2869
# Emit D-Bus signal
2870
mandos_dbus_service.ClientRemoved(
2871
client.dbus_object_path, client.name)
2872
client_settings.clear()
2873
2874
atexit.register(cleanup)
2875
2876
for client in tcp_server.clients.itervalues():
1419
2877
if use_dbus:
1420
2878
# Emit D-Bus signal
1421
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1422
client.GetAllProperties())
1423
client.enable()
2879
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2880
# Need to initiate checking of clients
2881
if client.enabled:
2882
client.init_checker()
1424
2883
1425
2884
tcp_server.enable()
1426
2885
tcp_server.server_activate()
1427
2886
1428
2887
# Find out what port we got
1429
service.port = tcp_server.socket.getsockname()[1]
2888
if zeroconf:
2889
service.port = tcp_server.socket.getsockname()[1]
1430
2890
if use_ipv6:
1431
logger.info(u"Now listening on address %r, port %d,"
1432
" flowinfo %d, scope_id %d"
1433
% tcp_server.socket.getsockname())
2891
logger.info("Now listening on address %r, port %d,"
2892
" flowinfo %d, scope_id %d",
2893
*tcp_server.socket.getsockname())
1434
2894
else: # IPv4
1435
logger.info(u"Now listening on address %r, port %d"
1436
% tcp_server.socket.getsockname())
2895
logger.info("Now listening on address %r, port %d",
2896
*tcp_server.socket.getsockname())
1437
2897
1438
2898
#service.interface = tcp_server.socket.getsockname()[3]
1439
2899
1440
2900
try:
1441
# From the Avahi example code
1442
server.connect_to_signal(u"StateChanged", server_state_changed)
1443
try:
1444
server_state_changed(server.GetState())
1445
except dbus.exceptions.DBusException, error:
1446
logger.critical(u"DBusException: %s", error)
1447
sys.exit(1)
1448
# End of Avahi example code
2901
if zeroconf:
2902
# From the Avahi example code
2903
try:
2904
service.activate()
2905
except dbus.exceptions.DBusException as error:
2906
logger.critical("D-Bus Exception", exc_info=error)
2907
cleanup()
2908
sys.exit(1)
2909
# End of Avahi example code
1449
2910
1450
2911
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1451
2912
lambda *args, **kwargs:
1452
2913
(tcp_server.handle_request
1453
2914
(*args[2:], **kwargs) or True))
1454
2915
1455
logger.debug(u"Starting main loop")
2916
logger.debug("Starting main loop")
1456
2917
main_loop.run()
1457
except AvahiError, error:
1458
logger.critical(u"AvahiError: %s", error)
2918
except AvahiError as error:
2919
logger.critical("Avahi Error", exc_info=error)
2920
cleanup()
1459
2921
sys.exit(1)
1460
2922
except KeyboardInterrupt:
1461
2923
if debug:
1462
print >> sys.stderr
1463
logger.debug(u"Server received KeyboardInterrupt")
1464
logger.debug(u"Server exiting")
2924
print("", file=sys.stderr)
2925
logger.debug("Server received KeyboardInterrupt")
2926
logger.debug("Server exiting")
2927
# Must run before the D-Bus bus name gets deregistered
2928
cleanup()
2929
1465
2930
1466
2931
if __name__ == '__main__':
1467
2932
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0