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- Committer: Teddy Hogeborn
- Date: 2012-06-24 03:45:55 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 303.
- Revision ID: teddy@recompile.se-20120624034555-7p0dtbpsz0dgsn4d
* mandos (Client.start_checker): Add comment. Break long line.
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" 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 © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
16
#
17
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# 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
import SocketServer as socketserver
37
40
import socket
38
import optparse
41
import argparse
39
42
import datetime
40
43
import errno
41
44
import gnutls.crypto
44
47
import gnutls.library.functions
45
48
import gnutls.library.constants
46
49
import gnutls.library.types
47
import ConfigParser
50
import ConfigParser as configparser
48
51
import sys
49
52
import re
50
53
import os
51
54
import signal
52
from sets import Set
53
55
import subprocess
54
56
import atexit
55
57
import stat
56
58
import logging
57
59
import logging.handlers
58
60
import pwd
59
from contextlib import closing
61
import contextlib
62
import struct
63
import fcntl
64
import functools
65
import cPickle as pickle
66
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
60
72
61
73
import dbus
62
74
import dbus.service
65
77
from dbus.mainloop.glib import DBusGMainLoop
66
78
import ctypes
67
79
import ctypes.util
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
80
import xml.dom.minidom
81
import inspect
82
import GnuPGInterface
83
84
try:
85
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
86
except AttributeError:
87
try:
88
from IN import SO_BINDTODEVICE
89
except ImportError:
90
SO_BINDTODEVICE = None
91
92
version = "1.6.0"
93
stored_state_file = "clients.pickle"
94
95
logger = logging.getLogger()
72
96
syslogger = (logging.handlers.SysLogHandler
73
97
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
98
address = str("/dev/log")))
99
100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
106
"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(str("16s16x"),
111
interface))
112
interface_index = struct.unpack(str("I"),
113
ifreq[16:20])[0]
114
return interface_index
115
116
117
def initlogger(debug, level=logging.WARNING):
118
"""init logger and add loglevel"""
119
120
syslogger.setFormatter(logging.Formatter
121
('Mandos [%(process)d]: %(levelname)s:'
122
' %(message)s'))
123
logger.addHandler(syslogger)
124
125
if debug:
126
console = logging.StreamHandler()
127
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
128
' [%(process)d]:'
129
' %(levelname)s:'
130
' %(message)s'))
131
logger.addHandler(console)
132
logger.setLevel(level)
133
134
135
class PGPError(Exception):
136
"""Exception if encryption/decryption fails"""
137
pass
138
139
140
class PGPEngine(object):
141
"""A simple class for OpenPGP symmetric encryption & decryption"""
142
def __init__(self):
143
self.gnupg = GnuPGInterface.GnuPG()
144
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
self.gnupg = GnuPGInterface.GnuPG()
146
self.gnupg.options.meta_interactive = False
147
self.gnupg.options.homedir = self.tempdir
148
self.gnupg.options.extra_args.extend(['--force-mdc',
149
'--quiet',
150
'--no-use-agent'])
151
152
def __enter__(self):
153
return self
154
155
def __exit__(self, exc_type, exc_value, traceback):
156
self._cleanup()
157
return False
158
159
def __del__(self):
160
self._cleanup()
161
162
def _cleanup(self):
163
if self.tempdir is not None:
164
# Delete contents of tempdir
165
for root, dirs, files in os.walk(self.tempdir,
166
topdown = False):
167
for filename in files:
168
os.remove(os.path.join(root, filename))
169
for dirname in dirs:
170
os.rmdir(os.path.join(root, dirname))
171
# Remove tempdir
172
os.rmdir(self.tempdir)
173
self.tempdir = None
174
175
def password_encode(self, password):
176
# Passphrase can not be empty and can not contain newlines or
177
# NUL bytes. So we prefix it and hex encode it.
178
return b"mandos" + binascii.hexlify(password)
179
180
def encrypt(self, data, password):
181
self.gnupg.passphrase = self.password_encode(password)
182
with open(os.devnull, "w") as devnull:
183
try:
184
proc = self.gnupg.run(['--symmetric'],
185
create_fhs=['stdin', 'stdout'],
186
attach_fhs={'stderr': devnull})
187
with contextlib.closing(proc.handles['stdin']) as f:
188
f.write(data)
189
with contextlib.closing(proc.handles['stdout']) as f:
190
ciphertext = f.read()
191
proc.wait()
192
except IOError as e:
193
raise PGPError(e)
194
self.gnupg.passphrase = None
195
return ciphertext
196
197
def decrypt(self, data, password):
198
self.gnupg.passphrase = self.password_encode(password)
199
with open(os.devnull, "w") as devnull:
200
try:
201
proc = self.gnupg.run(['--decrypt'],
202
create_fhs=['stdin', 'stdout'],
203
attach_fhs={'stderr': devnull})
204
with contextlib.closing(proc.handles['stdin']) as f:
205
f.write(data)
206
with contextlib.closing(proc.handles['stdout']) as f:
207
decrypted_plaintext = f.read()
208
proc.wait()
209
except IOError as e:
210
raise PGPError(e)
211
self.gnupg.passphrase = None
212
return decrypted_plaintext
213
83
214
84
215
class AvahiError(Exception):
85
216
def __init__(self, value, *args, **kwargs):
97
228
98
229
class AvahiService(object):
99
230
"""An Avahi (Zeroconf) service.
231
100
232
Attributes:
101
233
interface: integer; avahi.IF_UNSPEC or an interface index.
102
234
Used to optionally bind to the specified interface.
110
242
max_renames: integer; maximum number of renames
111
243
rename_count: integer; counter so we only rename after collisions
112
244
a sensible number of times
245
group: D-Bus Entry Group
246
server: D-Bus Server
247
bus: dbus.SystemBus()
113
248
"""
249
114
250
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
251
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
252
domain = "", host = "", max_renames = 32768,
253
protocol = avahi.PROTO_UNSPEC, bus = None):
117
254
self.interface = interface
118
255
self.name = name
119
256
self.type = servicetype
123
260
self.host = host
124
261
self.rename_count = 0
125
262
self.max_renames = max_renames
263
self.protocol = protocol
264
self.group = None # our entry group
265
self.server = None
266
self.bus = bus
267
self.entry_group_state_changed_match = None
268
126
269
def rename(self):
127
270
"""Derived from the Avahi example code"""
128
271
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
272
logger.critical("No suitable Zeroconf service name found"
273
" after %i retries, exiting.",
131
274
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
275
raise AvahiServiceError("Too many renames")
276
self.name = unicode(self.server
277
.GetAlternativeServiceName(self.name))
278
logger.info("Changing Zeroconf service name to %r ...",
279
self.name)
139
280
self.remove()
140
self.add()
281
try:
282
self.add()
283
except dbus.exceptions.DBusException as error:
284
logger.critical("D-Bus Exception", exc_info=error)
285
self.cleanup()
286
os._exit(1)
141
287
self.rename_count += 1
288
142
289
def remove(self):
143
290
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
291
if self.entry_group_state_changed_match is not None:
292
self.entry_group_state_changed_match.remove()
293
self.entry_group_state_changed_match = None
294
if self.group is not None:
295
self.group.Reset()
296
146
297
def add(self):
147
298
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
299
self.remove()
300
if self.group is None:
301
self.group = dbus.Interface(
302
self.bus.get_object(avahi.DBUS_NAME,
303
self.server.EntryGroupNew()),
304
avahi.DBUS_INTERFACE_ENTRY_GROUP)
305
self.entry_group_state_changed_match = (
306
self.group.connect_to_signal(
307
'StateChanged', self.entry_group_state_changed))
308
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
309
self.name, self.type)
310
self.group.AddService(
311
self.interface,
312
self.protocol,
313
dbus.UInt32(0), # flags
314
self.name, self.type,
315
self.domain, self.host,
316
dbus.UInt16(self.port),
317
avahi.string_array_to_txt_array(self.TXT))
318
self.group.Commit()
319
320
def entry_group_state_changed(self, state, error):
321
"""Derived from the Avahi example code"""
322
logger.debug("Avahi entry group state change: %i", state)
323
324
if state == avahi.ENTRY_GROUP_ESTABLISHED:
325
logger.debug("Zeroconf service established.")
326
elif state == avahi.ENTRY_GROUP_COLLISION:
327
logger.info("Zeroconf service name collision.")
328
self.rename()
329
elif state == avahi.ENTRY_GROUP_FAILURE:
330
logger.critical("Avahi: Error in group state changed %s",
331
unicode(error))
332
raise AvahiGroupError("State changed: {0!s}"
333
.format(error))
334
335
def cleanup(self):
336
"""Derived from the Avahi example code"""
337
if self.group is not None:
338
try:
339
self.group.Free()
340
except (dbus.exceptions.UnknownMethodException,
341
dbus.exceptions.DBusException):
342
pass
343
self.group = None
344
self.remove()
345
346
def server_state_changed(self, state, error=None):
347
"""Derived from the Avahi example code"""
348
logger.debug("Avahi server state change: %i", state)
349
bad_states = { avahi.SERVER_INVALID:
350
"Zeroconf server invalid",
351
avahi.SERVER_REGISTERING: None,
352
avahi.SERVER_COLLISION:
353
"Zeroconf server name collision",
354
avahi.SERVER_FAILURE:
355
"Zeroconf server failure" }
356
if state in bad_states:
357
if bad_states[state] is not None:
358
if error is None:
359
logger.error(bad_states[state])
360
else:
361
logger.error(bad_states[state] + ": %r", error)
362
self.cleanup()
363
elif state == avahi.SERVER_RUNNING:
364
self.add()
365
else:
366
if error is None:
367
logger.debug("Unknown state: %r", state)
368
else:
369
logger.debug("Unknown state: %r: %r", state, error)
370
371
def activate(self):
372
"""Derived from the Avahi example code"""
373
if self.server is None:
374
self.server = dbus.Interface(
375
self.bus.get_object(avahi.DBUS_NAME,
376
avahi.DBUS_PATH_SERVER,
377
follow_name_owner_changes=True),
378
avahi.DBUS_INTERFACE_SERVER)
379
self.server.connect_to_signal("StateChanged",
380
self.server_state_changed)
381
self.server_state_changed(self.server.GetState())
382
383
384
class AvahiServiceToSyslog(AvahiService):
385
def rename(self):
386
"""Add the new name to the syslog messages"""
387
ret = AvahiService.rename(self)
388
syslogger.setFormatter(logging.Formatter
389
('Mandos ({0}) [%(process)d]:'
390
' %(levelname)s: %(message)s'
391
.format(self.name)))
392
return ret
393
394
395
def timedelta_to_milliseconds(td):
396
"Convert a datetime.timedelta() to milliseconds"
397
return ((td.days * 24 * 60 * 60 * 1000)
398
+ (td.seconds * 1000)
399
+ (td.microseconds // 1000))
400
401
402
class Client(object):
179
403
"""A representation of a client host served by this server.
404
180
405
Attributes:
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
406
approved: bool(); 'None' if not yet approved/disapproved
407
approval_delay: datetime.timedelta(); Time to wait for approval
408
approval_duration: datetime.timedelta(); Duration of one approval
409
checker: subprocess.Popen(); a running checker process used
410
to see if the client lives.
411
'None' if no process is running.
412
checker_callback_tag: a gobject event source tag, or None
413
checker_command: string; External command which is run to check
414
if client lives. %() expansions are done at
415
runtime with vars(self) as dict, so that for
416
instance %(name)s can be used in the command.
417
checker_initiator_tag: a gobject event source tag, or None
418
created: datetime.datetime(); (UTC) object creation
419
client_structure: Object describing what attributes a client has
420
and is used for storing the client at exit
421
current_checker_command: string; current running checker_command
422
disable_initiator_tag: a gobject event source tag, or None
423
enabled: bool()
183
424
fingerprint: string (40 or 32 hexadecimal digits); used to
184
425
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
426
host: string; available for use by the checker command
187
created: datetime.datetime(); (UTC) object creation
188
last_enabled: datetime.datetime(); (UTC)
189
enabled: bool()
427
interval: datetime.timedelta(); How often to start a new checker
428
last_approval_request: datetime.datetime(); (UTC) or None
190
429
last_checked_ok: datetime.datetime(); (UTC) or None
430
last_checker_status: integer between 0 and 255 reflecting exit
431
status of last checker. -1 reflects crashed
432
checker, -2 means no checker completed yet.
433
last_enabled: datetime.datetime(); (UTC) or None
434
name: string; from the config file, used in log messages and
435
D-Bus identifiers
436
secret: bytestring; sent verbatim (over TLS) to client
191
437
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
198
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
200
checker_callback_tag: - '' -
201
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
203
runtime with vars(self) as dict, so that for
204
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
438
until this client is disabled
439
extended_timeout: extra long timeout when secret has been sent
440
runtime_expansions: Allowed attributes for runtime expansion.
441
expires: datetime.datetime(); time (UTC) when a client will be
442
disabled, or None
207
443
"""
444
445
runtime_expansions = ("approval_delay", "approval_duration",
446
"created", "enabled", "expires",
447
"fingerprint", "host", "interval",
448
"last_approval_request", "last_checked_ok",
449
"last_enabled", "name", "timeout")
450
client_defaults = { "timeout": "PT5M",
451
"extended_timeout": "PT15M",
452
"interval": "PT2M",
453
"checker": "fping -q -- %%(host)s",
454
"host": "",
455
"approval_delay": "PT0S",
456
"approval_duration": "PT1S",
457
"approved_by_default": "True",
458
"enabled": "True",
459
}
460
208
461
def timeout_milliseconds(self):
209
462
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
463
return timedelta_to_milliseconds(self.timeout)
464
465
def extended_timeout_milliseconds(self):
466
"Return the 'extended_timeout' attribute in milliseconds"
467
return timedelta_to_milliseconds(self.extended_timeout)
213
468
214
469
def interval_milliseconds(self):
215
470
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
219
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
471
return timedelta_to_milliseconds(self.interval)
472
473
def approval_delay_milliseconds(self):
474
return timedelta_to_milliseconds(self.approval_delay)
475
476
@staticmethod
477
def config_parser(config):
478
"""Construct a new dict of client settings of this form:
479
{ client_name: {setting_name: value, ...}, ...}
480
with exceptions for any special settings as defined above.
481
NOTE: Must be a pure function. Must return the same result
482
value given the same arguments.
483
"""
484
settings = {}
485
for client_name in config.sections():
486
section = dict(config.items(client_name))
487
client = settings[client_name] = {}
488
489
client["host"] = section["host"]
490
# Reformat values from string types to Python types
491
client["approved_by_default"] = config.getboolean(
492
client_name, "approved_by_default")
493
client["enabled"] = config.getboolean(client_name,
494
"enabled")
495
496
client["fingerprint"] = (section["fingerprint"].upper()
497
.replace(" ", ""))
498
if "secret" in section:
499
client["secret"] = section["secret"].decode("base64")
500
elif "secfile" in section:
501
with open(os.path.expanduser(os.path.expandvars
502
(section["secfile"])),
503
"rb") as secfile:
504
client["secret"] = secfile.read()
505
else:
506
raise TypeError("No secret or secfile for section {0}"
507
.format(section))
508
client["timeout"] = string_to_delta(section["timeout"])
509
client["extended_timeout"] = string_to_delta(
510
section["extended_timeout"])
511
client["interval"] = string_to_delta(section["interval"])
512
client["approval_delay"] = string_to_delta(
513
section["approval_delay"])
514
client["approval_duration"] = string_to_delta(
515
section["approval_duration"])
516
client["checker_command"] = section["checker"]
517
client["last_approval_request"] = None
518
client["last_checked_ok"] = None
519
client["last_checker_status"] = -2
520
521
return settings
522
523
def __init__(self, settings, name = None):
225
524
self.name = name
226
if config is None:
227
config = {}
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
525
# adding all client settings
526
for setting, value in settings.iteritems():
527
setattr(self, setting, value)
528
529
if self.enabled:
530
if not hasattr(self, "last_enabled"):
531
self.last_enabled = datetime.datetime.utcnow()
532
if not hasattr(self, "expires"):
533
self.expires = (datetime.datetime.utcnow()
534
+ self.timeout)
535
else:
536
self.last_enabled = None
537
self.expires = None
538
539
logger.debug("Creating client %r", self.name)
230
540
# Uppercase and remove spaces from fingerprint for later
231
541
# comparison purposes with return value from the fingerprint()
232
542
# function
233
self.fingerprint = (config["fingerprint"].upper()
234
.replace(u" ", u""))
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
242
self.secret = secfile.read()
243
else:
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.utcnow()
248
self.enabled = False
249
self.last_enabled = None
250
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
253
self.disable_hook = disable_hook
543
logger.debug(" Fingerprint: %s", self.fingerprint)
544
self.created = settings.get("created",
545
datetime.datetime.utcnow())
546
547
# attributes specific for this server instance
254
548
self.checker = None
255
549
self.checker_initiator_tag = None
256
550
self.disable_initiator_tag = None
257
551
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
552
self.current_checker_command = None
553
self.approved = None
554
self.approvals_pending = 0
555
self.changedstate = (multiprocessing_manager
556
.Condition(multiprocessing_manager
557
.Lock()))
558
self.client_structure = [attr for attr in
559
self.__dict__.iterkeys()
560
if not attr.startswith("_")]
561
self.client_structure.append("client_structure")
562
563
for name, t in inspect.getmembers(type(self),
564
lambda obj:
565
isinstance(obj,
566
property)):
567
if not name.startswith("_"):
568
self.client_structure.append(name)
569
570
# Send notice to process children that client state has changed
571
def send_changedstate(self):
572
with self.changedstate:
573
self.changedstate.notify_all()
269
574
270
575
def enable(self):
271
576
"""Start this client's checker and timeout hooks"""
577
if getattr(self, "enabled", False):
578
# Already enabled
579
return
580
self.expires = datetime.datetime.utcnow() + self.timeout
581
self.enabled = True
272
582
self.last_enabled = datetime.datetime.utcnow()
583
self.init_checker()
584
self.send_changedstate()
585
586
def disable(self, quiet=True):
587
"""Disable this client."""
588
if not getattr(self, "enabled", False):
589
return False
590
if not quiet:
591
logger.info("Disabling client %s", self.name)
592
if getattr(self, "disable_initiator_tag", None) is not None:
593
gobject.source_remove(self.disable_initiator_tag)
594
self.disable_initiator_tag = None
595
self.expires = None
596
if getattr(self, "checker_initiator_tag", None) is not None:
597
gobject.source_remove(self.checker_initiator_tag)
598
self.checker_initiator_tag = None
599
self.stop_checker()
600
self.enabled = False
601
if not quiet:
602
self.send_changedstate()
603
# Do not run this again if called by a gobject.timeout_add
604
return False
605
606
def __del__(self):
607
self.disable()
608
609
def init_checker(self):
273
610
# Schedule a new checker to be started an 'interval' from now,
274
611
# and every interval from then on.
612
if self.checker_initiator_tag is not None:
613
gobject.source_remove(self.checker_initiator_tag)
275
614
self.checker_initiator_tag = (gobject.timeout_add
276
615
(self.interval_milliseconds(),
277
616
self.start_checker))
278
# Also start a new checker *right now*.
279
self.start_checker()
280
617
# Schedule a disable() when 'timeout' has passed
618
if self.disable_initiator_tag is not None:
619
gobject.source_remove(self.disable_initiator_tag)
281
620
self.disable_initiator_tag = (gobject.timeout_add
282
621
(self.timeout_milliseconds(),
283
622
self.disable))
284
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
292
293
def disable(self):
294
"""Disable this client."""
295
if not getattr(self, "enabled", False):
296
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
299
gobject.source_remove(self.disable_initiator_tag)
300
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
302
gobject.source_remove(self.checker_initiator_tag)
303
self.checker_initiator_tag = None
304
self.stop_checker()
305
if self.disable_hook:
306
self.disable_hook(self)
307
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
312
# Do not run this again if called by a gobject.timeout_add
313
return False
314
315
def __del__(self):
316
self.disable_hook = None
317
self.disable()
623
# Also start a new checker *right now*.
624
self.start_checker()
318
625
319
626
def checker_callback(self, pid, condition, command):
320
627
"""The checker has completed, so take appropriate actions."""
321
628
self.checker_callback_tag = None
322
629
self.checker = None
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
630
if os.WIFEXITED(condition):
328
exitstatus = os.WEXITSTATUS(condition)
329
if exitstatus == 0:
330
logger.info(u"Checker for %(name)s succeeded",
631
self.last_checker_status = os.WEXITSTATUS(condition)
632
if self.last_checker_status == 0:
633
logger.info("Checker for %(name)s succeeded",
331
634
vars(self))
332
635
self.checked_ok()
333
636
else:
334
logger.info(u"Checker for %(name)s failed",
637
logger.info("Checker for %(name)s failed",
335
638
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
341
639
else:
342
logger.warning(u"Checker for %(name)s crashed?",
640
self.last_checker_status = -1
641
logger.warning("Checker for %(name)s crashed?",
343
642
vars(self))
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
643
350
644
def checked_ok(self):
351
"""Bump up the timeout for this client.
352
This should only be called when the client has been seen,
353
alive and well.
354
"""
645
"""Assert that the client has been seen, alive and well."""
355
646
self.last_checked_ok = datetime.datetime.utcnow()
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
647
self.last_checker_status = 0
648
self.bump_timeout()
649
650
def bump_timeout(self, timeout=None):
651
"""Bump up the timeout for this client."""
652
if timeout is None:
653
timeout = self.timeout
654
if self.disable_initiator_tag is not None:
655
gobject.source_remove(self.disable_initiator_tag)
656
self.disable_initiator_tag = None
657
if getattr(self, "enabled", False):
658
self.disable_initiator_tag = (gobject.timeout_add
659
(timedelta_to_milliseconds
660
(timeout), self.disable))
661
self.expires = datetime.datetime.utcnow() + timeout
662
663
def need_approval(self):
664
self.last_approval_request = datetime.datetime.utcnow()
366
665
367
666
def start_checker(self):
368
667
"""Start a new checker subprocess if one is not running.
668
369
669
If a checker already exists, leave it running and do
370
670
nothing."""
371
671
# The reason for not killing a running checker is that if we
372
# did that, then if a checker (for some reason) started
373
# running slowly and taking more than 'interval' time, the
374
# client would inevitably timeout, since no checker would get
375
# a chance to run to completion. If we instead leave running
672
# did that, and if a checker (for some reason) started running
673
# slowly and taking more than 'interval' time, then the client
674
# would inevitably timeout, since no checker would get a
675
# chance to run to completion. If we instead leave running
376
676
# checkers alone, the checker would have to take more time
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
677
# than 'timeout' for the client to be disabled, which is as it
678
# should be.
679
680
# If a checker exists, make sure it is not a zombie
681
try:
682
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
683
except (AttributeError, OSError) as error:
684
if (isinstance(error, OSError)
685
and error.errno != errno.ECHILD):
686
raise error
687
else:
688
if pid:
689
logger.warning("Checker was a zombie")
690
gobject.source_remove(self.checker_callback_tag)
691
self.checker_callback(pid, status,
692
self.current_checker_command)
693
# Start a new checker if needed
379
694
if self.checker is None:
380
try:
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
383
except TypeError:
384
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
386
for key, val in
387
vars(self).iteritems())
388
try:
389
command = self.checker_command % escaped_attrs
390
except TypeError, error:
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
393
return True # Try again later
394
try:
395
logger.info(u"Starting checker %r for %s",
695
# Escape attributes for the shell
696
escaped_attrs = dict(
697
(attr, re.escape(unicode(getattr(self, attr))))
698
for attr in
699
self.runtime_expansions)
700
try:
701
command = self.checker_command % escaped_attrs
702
except TypeError as error:
703
logger.error('Could not format string "%s"',
704
self.checker_command, exc_info=error)
705
return True # Try again later
706
self.current_checker_command = command
707
try:
708
logger.info("Starting checker %r for %s",
396
709
command, self.name)
397
710
# We don't need to redirect stdout and stderr, since
398
711
# in normal mode, that is already done by daemon(),
401
714
self.checker = subprocess.Popen(command,
402
715
close_fds=True,
403
716
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
self.checker_callback_tag = (gobject.child_watch_add
411
(self.checker.pid,
412
self.checker_callback,
413
data=command))
414
except OSError, error:
415
logger.error(u"Failed to start subprocess: %s",
416
error)
717
except OSError as error:
718
logger.error("Failed to start subprocess",
719
exc_info=error)
720
return True
721
self.checker_callback_tag = (gobject.child_watch_add
722
(self.checker.pid,
723
self.checker_callback,
724
data=command))
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
727
try:
728
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
729
except OSError as error:
730
if error.errno == errno.ECHILD:
731
# This should never happen
732
logger.error("Child process vanished",
733
exc_info=error)
734
return True
735
raise
736
if pid:
737
gobject.source_remove(self.checker_callback_tag)
738
self.checker_callback(pid, status, command)
417
739
# Re-run this periodically if run by gobject.timeout_add
418
740
return True
419
741
424
746
self.checker_callback_tag = None
425
747
if getattr(self, "checker", None) is None:
426
748
return
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
749
logger.debug("Stopping checker for %(name)s", vars(self))
428
750
try:
429
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
751
self.checker.terminate()
752
#time.sleep(0.5)
431
753
#if self.checker.poll() is None:
432
# os.kill(self.checker.pid, signal.SIGKILL)
433
except OSError, error:
754
# self.checker.kill()
755
except OSError as error:
434
756
if error.errno != errno.ESRCH: # No such process
435
757
raise
436
758
self.checker = None
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
def still_valid(self):
442
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
447
return now < (self.created + self.timeout)
448
else:
449
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"se.bsnet.fukt.Mandos.Client"
453
454
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
759
760
761
def dbus_service_property(dbus_interface, signature="v",
762
access="readwrite", byte_arrays=False):
763
"""Decorators for marking methods of a DBusObjectWithProperties to
764
become properties on the D-Bus.
765
766
The decorated method will be called with no arguments by "Get"
767
and with one argument by "Set".
768
769
The parameters, where they are supported, are the same as
770
dbus.service.method, except there is only "signature", since the
771
type from Get() and the type sent to Set() is the same.
772
"""
773
# Encoding deeply encoded byte arrays is not supported yet by the
774
# "Set" method, so we fail early here:
775
if byte_arrays and signature != "ay":
776
raise ValueError("Byte arrays not supported for non-'ay'"
777
" signature {0!r}".format(signature))
778
def decorator(func):
779
func._dbus_is_property = True
780
func._dbus_interface = dbus_interface
781
func._dbus_signature = signature
782
func._dbus_access = access
783
func._dbus_name = func.__name__
784
if func._dbus_name.endswith("_dbus_property"):
785
func._dbus_name = func._dbus_name[:-14]
786
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
787
return func
788
return decorator
789
790
791
def dbus_interface_annotations(dbus_interface):
792
"""Decorator for marking functions returning interface annotations
793
794
Usage:
795
796
@dbus_interface_annotations("org.example.Interface")
797
def _foo(self): # Function name does not matter
798
return {"org.freedesktop.DBus.Deprecated": "true",
799
"org.freedesktop.DBus.Property.EmitsChangedSignal":
800
"false"}
801
"""
802
def decorator(func):
803
func._dbus_is_interface = True
804
func._dbus_interface = dbus_interface
805
func._dbus_name = dbus_interface
806
return func
807
return decorator
808
809
810
def dbus_annotations(annotations):
811
"""Decorator to annotate D-Bus methods, signals or properties
812
Usage:
813
814
@dbus_service_property("org.example.Interface", signature="b",
815
access="r")
816
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
def Property_dbus_property(self):
820
return dbus.Boolean(False)
821
"""
822
def decorator(func):
823
func._dbus_annotations = annotations
824
return func
825
return decorator
826
827
828
class DBusPropertyException(dbus.exceptions.DBusException):
829
"""A base class for D-Bus property-related exceptions
830
"""
831
def __unicode__(self):
832
return unicode(str(self))
833
834
835
class DBusPropertyAccessException(DBusPropertyException):
836
"""A property's access permissions disallows an operation.
837
"""
838
pass
839
840
841
class DBusPropertyNotFound(DBusPropertyException):
842
"""An attempt was made to access a non-existing property.
843
"""
844
pass
845
846
847
class DBusObjectWithProperties(dbus.service.Object):
848
"""A D-Bus object with properties.
849
850
Classes inheriting from this can use the dbus_service_property
851
decorator to expose methods as D-Bus properties. It exposes the
852
standard Get(), Set(), and GetAll() methods on the D-Bus.
853
"""
854
855
@staticmethod
856
def _is_dbus_thing(thing):
857
"""Returns a function testing if an attribute is a D-Bus thing
858
859
If called like _is_dbus_thing("method") it returns a function
860
suitable for use as predicate to inspect.getmembers().
861
"""
862
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
863
False)
864
865
def _get_all_dbus_things(self, thing):
866
"""Returns a generator of (name, attribute) pairs
867
"""
868
return ((getattr(athing.__get__(self), "_dbus_name",
869
name),
870
athing.__get__(self))
871
for cls in self.__class__.__mro__
872
for name, athing in
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
875
876
def _get_dbus_property(self, interface_name, property_name):
877
"""Returns a bound method if one exists which is a D-Bus
878
property with the specified name and interface.
879
"""
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
882
(cls,
883
self._is_dbus_thing("property"))):
884
if (value._dbus_name == property_name
885
and value._dbus_interface == interface_name):
886
return value.__get__(self)
887
888
# No such property
889
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
+ interface_name + "."
891
+ property_name)
892
893
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
894
out_signature="v")
895
def Get(self, interface_name, property_name):
896
"""Standard D-Bus property Get() method, see D-Bus standard.
897
"""
898
prop = self._get_dbus_property(interface_name, property_name)
899
if prop._dbus_access == "write":
900
raise DBusPropertyAccessException(property_name)
901
value = prop()
902
if not hasattr(value, "variant_level"):
903
return value
904
return type(value)(value, variant_level=value.variant_level+1)
905
906
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
907
def Set(self, interface_name, property_name, value):
908
"""Standard D-Bus property Set() method, see D-Bus standard.
909
"""
910
prop = self._get_dbus_property(interface_name, property_name)
911
if prop._dbus_access == "read":
912
raise DBusPropertyAccessException(property_name)
913
if prop._dbus_get_args_options["byte_arrays"]:
914
# The byte_arrays option is not supported yet on
915
# signatures other than "ay".
916
if prop._dbus_signature != "ay":
917
raise ValueError
918
value = dbus.ByteArray(b''.join(chr(byte)
919
for byte in value))
920
prop(value)
921
922
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
923
out_signature="a{sv}")
924
def GetAll(self, interface_name):
925
"""Standard D-Bus property GetAll() method, see D-Bus
926
standard.
927
928
Note: Will not include properties with access="write".
929
"""
930
properties = {}
931
for name, prop in self._get_all_dbus_things("property"):
932
if (interface_name
933
and interface_name != prop._dbus_interface):
934
# Interface non-empty but did not match
935
continue
936
# Ignore write-only properties
937
if prop._dbus_access == "write":
938
continue
939
value = prop()
940
if not hasattr(value, "variant_level"):
941
properties[name] = value
942
continue
943
properties[name] = type(value)(value, variant_level=
944
value.variant_level+1)
945
return dbus.Dictionary(properties, signature="sv")
946
947
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
948
out_signature="s",
949
path_keyword='object_path',
950
connection_keyword='connection')
951
def Introspect(self, object_path, connection):
952
"""Overloading of standard D-Bus method.
953
954
Inserts property tags and interface annotation tags.
955
"""
956
xmlstring = dbus.service.Object.Introspect(self, object_path,
957
connection)
958
try:
959
document = xml.dom.minidom.parseString(xmlstring)
960
def make_tag(document, name, prop):
961
e = document.createElement("property")
962
e.setAttribute("name", name)
963
e.setAttribute("type", prop._dbus_signature)
964
e.setAttribute("access", prop._dbus_access)
965
return e
966
for if_tag in document.getElementsByTagName("interface"):
967
# Add property tags
968
for tag in (make_tag(document, name, prop)
969
for name, prop
970
in self._get_all_dbus_things("property")
971
if prop._dbus_interface
972
== if_tag.getAttribute("name")):
973
if_tag.appendChild(tag)
974
# Add annotation tags
975
for typ in ("method", "signal", "property"):
976
for tag in if_tag.getElementsByTagName(typ):
977
annots = dict()
978
for name, prop in (self.
979
_get_all_dbus_things(typ)):
980
if (name == tag.getAttribute("name")
981
and prop._dbus_interface
982
== if_tag.getAttribute("name")):
983
annots.update(getattr
984
(prop,
985
"_dbus_annotations",
986
{}))
987
for name, value in annots.iteritems():
988
ann_tag = document.createElement(
989
"annotation")
990
ann_tag.setAttribute("name", name)
991
ann_tag.setAttribute("value", value)
992
tag.appendChild(ann_tag)
993
# Add interface annotation tags
994
for annotation, value in dict(
995
itertools.chain.from_iterable(
996
annotations().iteritems()
997
for name, annotations in
998
self._get_all_dbus_things("interface")
999
if name == if_tag.getAttribute("name")
1000
)).iteritems():
1001
ann_tag = document.createElement("annotation")
1002
ann_tag.setAttribute("name", annotation)
1003
ann_tag.setAttribute("value", value)
1004
if_tag.appendChild(ann_tag)
1005
# Add the names to the return values for the
1006
# "org.freedesktop.DBus.Properties" methods
1007
if (if_tag.getAttribute("name")
1008
== "org.freedesktop.DBus.Properties"):
1009
for cn in if_tag.getElementsByTagName("method"):
1010
if cn.getAttribute("name") == "Get":
1011
for arg in cn.getElementsByTagName("arg"):
1012
if (arg.getAttribute("direction")
1013
== "out"):
1014
arg.setAttribute("name", "value")
1015
elif cn.getAttribute("name") == "GetAll":
1016
for arg in cn.getElementsByTagName("arg"):
1017
if (arg.getAttribute("direction")
1018
== "out"):
1019
arg.setAttribute("name", "props")
1020
xmlstring = document.toxml("utf-8")
1021
document.unlink()
1022
except (AttributeError, xml.dom.DOMException,
1023
xml.parsers.expat.ExpatError) as error:
1024
logger.error("Failed to override Introspection method",
1025
exc_info=error)
1026
return xmlstring
1027
1028
1029
def datetime_to_dbus(dt, variant_level=0):
1030
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1031
if dt is None:
1032
return dbus.String("", variant_level = variant_level)
1033
return dbus.String(dt.isoformat(),
1034
variant_level=variant_level)
1035
1036
1037
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1038
"""A class decorator; applied to a subclass of
1039
dbus.service.Object, it will add alternate D-Bus attributes with
1040
interface names according to the "alt_interface_names" mapping.
1041
Usage:
1042
1043
@alternate_dbus_interfaces({"org.example.Interface":
1044
"net.example.AlternateInterface"})
1045
class SampleDBusObject(dbus.service.Object):
1046
@dbus.service.method("org.example.Interface")
1047
def SampleDBusMethod():
1048
pass
1049
1050
The above "SampleDBusMethod" on "SampleDBusObject" will be
1051
reachable via two interfaces: "org.example.Interface" and
1052
"net.example.AlternateInterface", the latter of which will have
1053
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1054
"true", unless "deprecate" is passed with a False value.
1055
1056
This works for methods and signals, and also for D-Bus properties
1057
(from DBusObjectWithProperties) and interfaces (from the
1058
dbus_interface_annotations decorator).
1059
"""
1060
def wrapper(cls):
1061
for orig_interface_name, alt_interface_name in (
1062
alt_interface_names.iteritems()):
1063
attr = {}
1064
interface_names = set()
1065
# Go though all attributes of the class
1066
for attrname, attribute in inspect.getmembers(cls):
1067
# Ignore non-D-Bus attributes, and D-Bus attributes
1068
# with the wrong interface name
1069
if (not hasattr(attribute, "_dbus_interface")
1070
or not attribute._dbus_interface
1071
.startswith(orig_interface_name)):
1072
continue
1073
# Create an alternate D-Bus interface name based on
1074
# the current name
1075
alt_interface = (attribute._dbus_interface
1076
.replace(orig_interface_name,
1077
alt_interface_name))
1078
interface_names.add(alt_interface)
1079
# Is this a D-Bus signal?
1080
if getattr(attribute, "_dbus_is_signal", False):
1081
# Extract the original non-method function by
1082
# black magic
1083
nonmethod_func = (dict(
1084
zip(attribute.func_code.co_freevars,
1085
attribute.__closure__))["func"]
1086
.cell_contents)
1087
# Create a new, but exactly alike, function
1088
# object, and decorate it to be a new D-Bus signal
1089
# with the alternate D-Bus interface name
1090
new_function = (dbus.service.signal
1091
(alt_interface,
1092
attribute._dbus_signature)
1093
(types.FunctionType(
1094
nonmethod_func.func_code,
1095
nonmethod_func.func_globals,
1096
nonmethod_func.func_name,
1097
nonmethod_func.func_defaults,
1098
nonmethod_func.func_closure)))
1099
# Copy annotations, if any
1100
try:
1101
new_function._dbus_annotations = (
1102
dict(attribute._dbus_annotations))
1103
except AttributeError:
1104
pass
1105
# Define a creator of a function to call both the
1106
# original and alternate functions, so both the
1107
# original and alternate signals gets sent when
1108
# the function is called
1109
def fixscope(func1, func2):
1110
"""This function is a scope container to pass
1111
func1 and func2 to the "call_both" function
1112
outside of its arguments"""
1113
def call_both(*args, **kwargs):
1114
"""This function will emit two D-Bus
1115
signals by calling func1 and func2"""
1116
func1(*args, **kwargs)
1117
func2(*args, **kwargs)
1118
return call_both
1119
# Create the "call_both" function and add it to
1120
# the class
1121
attr[attrname] = fixscope(attribute, new_function)
1122
# Is this a D-Bus method?
1123
elif getattr(attribute, "_dbus_is_method", False):
1124
# Create a new, but exactly alike, function
1125
# object. Decorate it to be a new D-Bus method
1126
# with the alternate D-Bus interface name. Add it
1127
# to the class.
1128
attr[attrname] = (dbus.service.method
1129
(alt_interface,
1130
attribute._dbus_in_signature,
1131
attribute._dbus_out_signature)
1132
(types.FunctionType
1133
(attribute.func_code,
1134
attribute.func_globals,
1135
attribute.func_name,
1136
attribute.func_defaults,
1137
attribute.func_closure)))
1138
# Copy annotations, if any
1139
try:
1140
attr[attrname]._dbus_annotations = (
1141
dict(attribute._dbus_annotations))
1142
except AttributeError:
1143
pass
1144
# Is this a D-Bus property?
1145
elif getattr(attribute, "_dbus_is_property", False):
1146
# Create a new, but exactly alike, function
1147
# object, and decorate it to be a new D-Bus
1148
# property with the alternate D-Bus interface
1149
# name. Add it to the class.
1150
attr[attrname] = (dbus_service_property
1151
(alt_interface,
1152
attribute._dbus_signature,
1153
attribute._dbus_access,
1154
attribute
1155
._dbus_get_args_options
1156
["byte_arrays"])
1157
(types.FunctionType
1158
(attribute.func_code,
1159
attribute.func_globals,
1160
attribute.func_name,
1161
attribute.func_defaults,
1162
attribute.func_closure)))
1163
# Copy annotations, if any
1164
try:
1165
attr[attrname]._dbus_annotations = (
1166
dict(attribute._dbus_annotations))
1167
except AttributeError:
1168
pass
1169
# Is this a D-Bus interface?
1170
elif getattr(attribute, "_dbus_is_interface", False):
1171
# Create a new, but exactly alike, function
1172
# object. Decorate it to be a new D-Bus interface
1173
# with the alternate D-Bus interface name. Add it
1174
# to the class.
1175
attr[attrname] = (dbus_interface_annotations
1176
(alt_interface)
1177
(types.FunctionType
1178
(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
if deprecate:
1184
# Deprecate all alternate interfaces
1185
iname="_AlternateDBusNames_interface_annotation{0}"
1186
for interface_name in interface_names:
1187
@dbus_interface_annotations(interface_name)
1188
def func(self):
1189
return { "org.freedesktop.DBus.Deprecated":
1190
"true" }
1191
# Find an unused name
1192
for aname in (iname.format(i)
1193
for i in itertools.count()):
1194
if aname not in attr:
1195
attr[aname] = func
1196
break
1197
if interface_names:
1198
# Replace the class with a new subclass of it with
1199
# methods, signals, etc. as created above.
1200
cls = type(b"{0}Alternate".format(cls.__name__),
1201
(cls,), attr)
1202
return cls
1203
return wrapper
1204
1205
1206
@alternate_dbus_interfaces({"se.recompile.Mandos":
1207
"se.bsnet.fukt.Mandos"})
1208
class ClientDBus(Client, DBusObjectWithProperties):
1209
"""A Client class using D-Bus
1210
1211
Attributes:
1212
dbus_object_path: dbus.ObjectPath
1213
bus: dbus.SystemBus()
1214
"""
1215
1216
runtime_expansions = (Client.runtime_expansions
1217
+ ("dbus_object_path",))
1218
1219
# dbus.service.Object doesn't use super(), so we can't either.
1220
1221
def __init__(self, bus = None, *args, **kwargs):
1222
self.bus = bus
1223
Client.__init__(self, *args, **kwargs)
1224
# Only now, when this client is initialized, can it show up on
1225
# the D-Bus
1226
client_object_name = unicode(self.name).translate(
1227
{ord("."): ord("_"),
1228
ord("-"): ord("_")})
1229
self.dbus_object_path = (dbus.ObjectPath
1230
("/clients/" + client_object_name))
1231
DBusObjectWithProperties.__init__(self, self.bus,
1232
self.dbus_object_path)
1233
1234
def notifychangeproperty(transform_func,
1235
dbus_name, type_func=lambda x: x,
1236
variant_level=1):
1237
""" Modify a variable so that it's a property which announces
1238
its changes to DBus.
1239
1240
transform_fun: Function that takes a value and a variant_level
1241
and transforms it to a D-Bus type.
1242
dbus_name: D-Bus name of the variable
1243
type_func: Function that transform the value before sending it
1244
to the D-Bus. Default: no transform
1245
variant_level: D-Bus variant level. Default: 1
1246
"""
1247
attrname = "_{0}".format(dbus_name)
1248
def setter(self, value):
1249
if hasattr(self, "dbus_object_path"):
1250
if (not hasattr(self, attrname) or
1251
type_func(getattr(self, attrname, None))
1252
!= type_func(value)):
1253
dbus_value = transform_func(type_func(value),
1254
variant_level
1255
=variant_level)
1256
self.PropertyChanged(dbus.String(dbus_name),
1257
dbus_value)
1258
setattr(self, attrname, value)
1259
1260
return property(lambda self: getattr(self, attrname), setter)
1261
1262
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1263
approvals_pending = notifychangeproperty(dbus.Boolean,
1264
"ApprovalPending",
1265
type_func = bool)
1266
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1267
last_enabled = notifychangeproperty(datetime_to_dbus,
1268
"LastEnabled")
1269
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1270
type_func = lambda checker:
1271
checker is not None)
1272
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1273
"LastCheckedOK")
1274
last_checker_status = notifychangeproperty(dbus.Int16,
1275
"LastCheckerStatus")
1276
last_approval_request = notifychangeproperty(
1277
datetime_to_dbus, "LastApprovalRequest")
1278
approved_by_default = notifychangeproperty(dbus.Boolean,
1279
"ApprovedByDefault")
1280
approval_delay = notifychangeproperty(dbus.UInt64,
1281
"ApprovalDelay",
1282
type_func =
1283
timedelta_to_milliseconds)
1284
approval_duration = notifychangeproperty(
1285
dbus.UInt64, "ApprovalDuration",
1286
type_func = timedelta_to_milliseconds)
1287
host = notifychangeproperty(dbus.String, "Host")
1288
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1289
type_func =
1290
timedelta_to_milliseconds)
1291
extended_timeout = notifychangeproperty(
1292
dbus.UInt64, "ExtendedTimeout",
1293
type_func = timedelta_to_milliseconds)
1294
interval = notifychangeproperty(dbus.UInt64,
1295
"Interval",
1296
type_func =
1297
timedelta_to_milliseconds)
1298
checker_command = notifychangeproperty(dbus.String, "Checker")
1299
1300
del notifychangeproperty
1301
1302
def __del__(self, *args, **kwargs):
1303
try:
1304
self.remove_from_connection()
1305
except LookupError:
1306
pass
1307
if hasattr(DBusObjectWithProperties, "__del__"):
1308
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1309
Client.__del__(self, *args, **kwargs)
1310
1311
def checker_callback(self, pid, condition, command,
1312
*args, **kwargs):
1313
self.checker_callback_tag = None
1314
self.checker = None
1315
if os.WIFEXITED(condition):
1316
exitstatus = os.WEXITSTATUS(condition)
1317
# Emit D-Bus signal
1318
self.CheckerCompleted(dbus.Int16(exitstatus),
1319
dbus.Int64(condition),
1320
dbus.String(command))
1321
else:
1322
# Emit D-Bus signal
1323
self.CheckerCompleted(dbus.Int16(-1),
1324
dbus.Int64(condition),
1325
dbus.String(command))
1326
1327
return Client.checker_callback(self, pid, condition, command,
1328
*args, **kwargs)
1329
1330
def start_checker(self, *args, **kwargs):
1331
old_checker = self.checker
1332
if self.checker is not None:
1333
old_checker_pid = self.checker.pid
1334
else:
1335
old_checker_pid = None
1336
r = Client.start_checker(self, *args, **kwargs)
1337
# Only if new checker process was started
1338
if (self.checker is not None
1339
and old_checker_pid != self.checker.pid):
1340
# Emit D-Bus signal
1341
self.CheckerStarted(self.current_checker_command)
1342
return r
1343
1344
def _reset_approved(self):
1345
self.approved = None
1346
return False
1347
1348
def approve(self, value=True):
1349
self.approved = value
1350
gobject.timeout_add(timedelta_to_milliseconds
1351
(self.approval_duration),
1352
self._reset_approved)
1353
self.send_changedstate()
1354
1355
## D-Bus methods, signals & properties
1356
_interface = "se.recompile.Mandos.Client"
1357
1358
## Interfaces
1359
1360
@dbus_interface_annotations(_interface)
1361
def _foo(self):
1362
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1363
"false"}
1364
1365
## Signals
457
1366
458
1367
# CheckerCompleted - signal
459
1368
@dbus.service.signal(_interface, signature="nxs")
467
1376
"D-Bus signal"
468
1377
pass
469
1378
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
1379
# PropertyChanged - signal
518
1380
@dbus.service.signal(_interface, signature="sv")
519
1381
def PropertyChanged(self, property, value):
520
1382
"D-Bus signal"
521
1383
pass
522
1384
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
1385
# GotSecret - signal
1386
@dbus.service.signal(_interface)
1387
def GotSecret(self):
1388
"""D-Bus signal
1389
Is sent after a successful transfer of secret from the Mandos
1390
server to mandos-client
1391
"""
1392
pass
1393
1394
# Rejected - signal
1395
@dbus.service.signal(_interface, signature="s")
1396
def Rejected(self, reason):
1397
"D-Bus signal"
1398
pass
1399
1400
# NeedApproval - signal
1401
@dbus.service.signal(_interface, signature="tb")
1402
def NeedApproval(self, timeout, default):
1403
"D-Bus signal"
1404
return self.need_approval()
1405
1406
## Methods
1407
1408
# Approve - method
1409
@dbus.service.method(_interface, in_signature="b")
1410
def Approve(self, value):
1411
self.approve(value)
1412
1413
# CheckedOK - method
1414
@dbus.service.method(_interface)
1415
def CheckedOK(self):
1416
self.checked_ok()
566
1417
567
1418
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
1419
@dbus.service.method(_interface)
1420
def Enable(self):
1421
"D-Bus method"
1422
self.enable()
570
1423
571
1424
# StartChecker - method
572
1425
@dbus.service.method(_interface)
581
1434
self.disable()
582
1435
583
1436
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
1437
@dbus.service.method(_interface)
1438
def StopChecker(self):
1439
self.stop_checker()
1440
1441
## Properties
1442
1443
# ApprovalPending - property
1444
@dbus_service_property(_interface, signature="b", access="read")
1445
def ApprovalPending_dbus_property(self):
1446
return dbus.Boolean(bool(self.approvals_pending))
1447
1448
# ApprovedByDefault - property
1449
@dbus_service_property(_interface, signature="b",
1450
access="readwrite")
1451
def ApprovedByDefault_dbus_property(self, value=None):
1452
if value is None: # get
1453
return dbus.Boolean(self.approved_by_default)
1454
self.approved_by_default = bool(value)
1455
1456
# ApprovalDelay - property
1457
@dbus_service_property(_interface, signature="t",
1458
access="readwrite")
1459
def ApprovalDelay_dbus_property(self, value=None):
1460
if value is None: # get
1461
return dbus.UInt64(self.approval_delay_milliseconds())
1462
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1463
1464
# ApprovalDuration - property
1465
@dbus_service_property(_interface, signature="t",
1466
access="readwrite")
1467
def ApprovalDuration_dbus_property(self, value=None):
1468
if value is None: # get
1469
return dbus.UInt64(timedelta_to_milliseconds(
1470
self.approval_duration))
1471
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1472
1473
# Name - property
1474
@dbus_service_property(_interface, signature="s", access="read")
1475
def Name_dbus_property(self):
1476
return dbus.String(self.name)
1477
1478
# Fingerprint - property
1479
@dbus_service_property(_interface, signature="s", access="read")
1480
def Fingerprint_dbus_property(self):
1481
return dbus.String(self.fingerprint)
1482
1483
# Host - property
1484
@dbus_service_property(_interface, signature="s",
1485
access="readwrite")
1486
def Host_dbus_property(self, value=None):
1487
if value is None: # get
1488
return dbus.String(self.host)
1489
self.host = unicode(value)
1490
1491
# Created - property
1492
@dbus_service_property(_interface, signature="s", access="read")
1493
def Created_dbus_property(self):
1494
return datetime_to_dbus(self.created)
1495
1496
# LastEnabled - property
1497
@dbus_service_property(_interface, signature="s", access="read")
1498
def LastEnabled_dbus_property(self):
1499
return datetime_to_dbus(self.last_enabled)
1500
1501
# Enabled - property
1502
@dbus_service_property(_interface, signature="b",
1503
access="readwrite")
1504
def Enabled_dbus_property(self, value=None):
1505
if value is None: # get
1506
return dbus.Boolean(self.enabled)
1507
if value:
1508
self.enable()
1509
else:
1510
self.disable()
1511
1512
# LastCheckedOK - property
1513
@dbus_service_property(_interface, signature="s",
1514
access="readwrite")
1515
def LastCheckedOK_dbus_property(self, value=None):
1516
if value is not None:
1517
self.checked_ok()
1518
return
1519
return datetime_to_dbus(self.last_checked_ok)
1520
1521
# LastCheckerStatus - property
1522
@dbus_service_property(_interface, signature="n",
1523
access="read")
1524
def LastCheckerStatus_dbus_property(self):
1525
return dbus.Int16(self.last_checker_status)
1526
1527
# Expires - property
1528
@dbus_service_property(_interface, signature="s", access="read")
1529
def Expires_dbus_property(self):
1530
return datetime_to_dbus(self.expires)
1531
1532
# LastApprovalRequest - property
1533
@dbus_service_property(_interface, signature="s", access="read")
1534
def LastApprovalRequest_dbus_property(self):
1535
return datetime_to_dbus(self.last_approval_request)
1536
1537
# Timeout - property
1538
@dbus_service_property(_interface, signature="t",
1539
access="readwrite")
1540
def Timeout_dbus_property(self, value=None):
1541
if value is None: # get
1542
return dbus.UInt64(self.timeout_milliseconds())
1543
old_timeout = self.timeout
1544
self.timeout = datetime.timedelta(0, 0, 0, value)
1545
# Reschedule disabling
1546
if self.enabled:
1547
now = datetime.datetime.utcnow()
1548
self.expires += self.timeout - old_timeout
1549
if self.expires <= now:
1550
# The timeout has passed
1551
self.disable()
1552
else:
1553
if (getattr(self, "disable_initiator_tag", None)
1554
is None):
1555
return
1556
gobject.source_remove(self.disable_initiator_tag)
1557
self.disable_initiator_tag = (
1558
gobject.timeout_add(
1559
timedelta_to_milliseconds(self.expires - now),
1560
self.disable))
1561
1562
# ExtendedTimeout - property
1563
@dbus_service_property(_interface, signature="t",
1564
access="readwrite")
1565
def ExtendedTimeout_dbus_property(self, value=None):
1566
if value is None: # get
1567
return dbus.UInt64(self.extended_timeout_milliseconds())
1568
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1569
1570
# Interval - property
1571
@dbus_service_property(_interface, signature="t",
1572
access="readwrite")
1573
def Interval_dbus_property(self, value=None):
1574
if value is None: # get
1575
return dbus.UInt64(self.interval_milliseconds())
1576
self.interval = datetime.timedelta(0, 0, 0, value)
1577
if getattr(self, "checker_initiator_tag", None) is None:
1578
return
1579
if self.enabled:
1580
# Reschedule checker run
1581
gobject.source_remove(self.checker_initiator_tag)
1582
self.checker_initiator_tag = (gobject.timeout_add
1583
(value, self.start_checker))
1584
self.start_checker() # Start one now, too
1585
1586
# Checker - property
1587
@dbus_service_property(_interface, signature="s",
1588
access="readwrite")
1589
def Checker_dbus_property(self, value=None):
1590
if value is None: # get
1591
return dbus.String(self.checker_command)
1592
self.checker_command = unicode(value)
1593
1594
# CheckerRunning - property
1595
@dbus_service_property(_interface, signature="b",
1596
access="readwrite")
1597
def CheckerRunning_dbus_property(self, value=None):
1598
if value is None: # get
1599
return dbus.Boolean(self.checker is not None)
1600
if value:
1601
self.start_checker()
1602
else:
1603
self.stop_checker()
1604
1605
# ObjectPath - property
1606
@dbus_service_property(_interface, signature="o", access="read")
1607
def ObjectPath_dbus_property(self):
1608
return self.dbus_object_path # is already a dbus.ObjectPath
1609
1610
# Secret = property
1611
@dbus_service_property(_interface, signature="ay",
1612
access="write", byte_arrays=True)
1613
def Secret_dbus_property(self, value):
1614
self.secret = str(value)
586
1615
587
1616
del _interface
588
1617
589
1618
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
596
# ...do the normal thing
597
return session.peer_certificate
598
list_size = ctypes.c_uint()
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if list_size.value == 0:
603
return None
604
cert = cert_list[0]
605
return ctypes.string_at(cert.data, cert.size)
606
607
608
def fingerprint(openpgp):
609
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
610
# New GnuTLS "datum" with the OpenPGP public key
611
datum = (gnutls.library.types
612
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
613
ctypes.POINTER
614
(ctypes.c_ubyte)),
615
ctypes.c_uint(len(openpgp))))
616
# New empty GnuTLS certificate
617
crt = gnutls.library.types.gnutls_openpgp_crt_t()
618
(gnutls.library.functions
619
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
620
# Import the OpenPGP public key into the certificate
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
623
gnutls.library.constants
624
.GNUTLS_OPENPGP_FMT_RAW))
625
# Verify the self signature in the key
626
crtverify = ctypes.c_uint()
627
(gnutls.library.functions
628
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
629
if crtverify.value != 0:
630
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
631
raise gnutls.errors.CertificateSecurityError("Verify failed")
632
# New buffer for the fingerprint
633
buf = ctypes.create_string_buffer(20)
634
buf_len = ctypes.c_size_t()
635
# Get the fingerprint from the certificate into the buffer
636
(gnutls.library.functions
637
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
638
ctypes.byref(buf_len)))
639
# Deinit the certificate
640
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
# Convert the buffer to a Python bytestring
642
fpr = ctypes.string_at(buf, buf_len.value)
643
# Convert the bytestring to hexadecimal notation
644
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
645
return hex_fpr
646
647
648
class TCP_handler(SocketServer.BaseRequestHandler, object):
649
"""A TCP request handler class.
650
Instantiated by IPv6_TCPServer for each request to handle it.
1619
class ProxyClient(object):
1620
def __init__(self, child_pipe, fpr, address):
1621
self._pipe = child_pipe
1622
self._pipe.send(('init', fpr, address))
1623
if not self._pipe.recv():
1624
raise KeyError()
1625
1626
def __getattribute__(self, name):
1627
if name == '_pipe':
1628
return super(ProxyClient, self).__getattribute__(name)
1629
self._pipe.send(('getattr', name))
1630
data = self._pipe.recv()
1631
if data[0] == 'data':
1632
return data[1]
1633
if data[0] == 'function':
1634
def func(*args, **kwargs):
1635
self._pipe.send(('funcall', name, args, kwargs))
1636
return self._pipe.recv()[1]
1637
return func
1638
1639
def __setattr__(self, name, value):
1640
if name == '_pipe':
1641
return super(ProxyClient, self).__setattr__(name, value)
1642
self._pipe.send(('setattr', name, value))
1643
1644
1645
class ClientHandler(socketserver.BaseRequestHandler, object):
1646
"""A class to handle client connections.
1647
1648
Instantiated once for each connection to handle it.
651
1649
Note: This will run in its own forked process."""
652
1650
653
1651
def handle(self):
654
logger.info(u"TCP connection from: %s",
655
unicode(self.client_address))
656
session = (gnutls.connection
657
.ClientSession(self.request,
658
gnutls.connection
659
.X509Credentials()))
660
661
line = self.request.makefile().readline()
662
logger.debug(u"Protocol version: %r", line)
663
try:
664
if int(line.strip().split()[0]) > 1:
665
raise RuntimeError
666
except (ValueError, IndexError, RuntimeError), error:
667
logger.error(u"Unknown protocol version: %s", error)
668
return
669
670
# Note: gnutls.connection.X509Credentials is really a generic
671
# GnuTLS certificate credentials object so long as no X.509
672
# keys are added to it. Therefore, we can use it here despite
673
# using OpenPGP certificates.
674
675
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
676
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
677
# "+DHE-DSS"))
678
# Use a fallback default, since this MUST be set.
679
priority = self.server.settings.get("priority", "NORMAL")
680
(gnutls.library.functions
681
.gnutls_priority_set_direct(session._c_object,
682
priority, None))
683
684
try:
685
session.handshake()
686
except gnutls.errors.GNUTLSError, error:
687
logger.warning(u"Handshake failed: %s", error)
688
# Do not run session.bye() here: the session is not
689
# established. Just abandon the request.
690
return
691
try:
692
fpr = fingerprint(peer_certificate(session))
693
except (TypeError, gnutls.errors.GNUTLSError), error:
694
logger.warning(u"Bad certificate: %s", error)
695
session.bye()
696
return
697
logger.debug(u"Fingerprint: %s", fpr)
698
for c in self.server.clients:
699
if c.fingerprint == fpr:
700
client = c
701
break
702
else:
703
logger.warning(u"Client not found for fingerprint: %s",
704
fpr)
705
session.bye()
706
return
707
# Have to check if client.still_valid(), since it is possible
708
# that the client timed out while establishing the GnuTLS
709
# session.
710
if not client.still_valid():
711
logger.warning(u"Client %(name)s is invalid",
712
vars(client))
713
session.bye()
714
return
715
## This won't work here, since we're in a fork.
716
# client.checked_ok()
717
sent_size = 0
718
while sent_size < len(client.secret):
719
sent = session.send(client.secret[sent_size:])
720
logger.debug(u"Sent: %d, remaining: %d",
721
sent, len(client.secret)
722
- (sent_size + sent))
723
sent_size += sent
724
session.bye()
725
726
727
class IPv6_TCPServer(SocketServer.ForkingMixIn,
728
SocketServer.TCPServer, object):
729
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1652
with contextlib.closing(self.server.child_pipe) as child_pipe:
1653
logger.info("TCP connection from: %s",
1654
unicode(self.client_address))
1655
logger.debug("Pipe FD: %d",
1656
self.server.child_pipe.fileno())
1657
1658
session = (gnutls.connection
1659
.ClientSession(self.request,
1660
gnutls.connection
1661
.X509Credentials()))
1662
1663
# Note: gnutls.connection.X509Credentials is really a
1664
# generic GnuTLS certificate credentials object so long as
1665
# no X.509 keys are added to it. Therefore, we can use it
1666
# here despite using OpenPGP certificates.
1667
1668
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1669
# "+AES-256-CBC", "+SHA1",
1670
# "+COMP-NULL", "+CTYPE-OPENPGP",
1671
# "+DHE-DSS"))
1672
# Use a fallback default, since this MUST be set.
1673
priority = self.server.gnutls_priority
1674
if priority is None:
1675
priority = "NORMAL"
1676
(gnutls.library.functions
1677
.gnutls_priority_set_direct(session._c_object,
1678
priority, None))
1679
1680
# Start communication using the Mandos protocol
1681
# Get protocol number
1682
line = self.request.makefile().readline()
1683
logger.debug("Protocol version: %r", line)
1684
try:
1685
if int(line.strip().split()[0]) > 1:
1686
raise RuntimeError
1687
except (ValueError, IndexError, RuntimeError) as error:
1688
logger.error("Unknown protocol version: %s", error)
1689
return
1690
1691
# Start GnuTLS connection
1692
try:
1693
session.handshake()
1694
except gnutls.errors.GNUTLSError as error:
1695
logger.warning("Handshake failed: %s", error)
1696
# Do not run session.bye() here: the session is not
1697
# established. Just abandon the request.
1698
return
1699
logger.debug("Handshake succeeded")
1700
1701
approval_required = False
1702
try:
1703
try:
1704
fpr = self.fingerprint(self.peer_certificate
1705
(session))
1706
except (TypeError,
1707
gnutls.errors.GNUTLSError) as error:
1708
logger.warning("Bad certificate: %s", error)
1709
return
1710
logger.debug("Fingerprint: %s", fpr)
1711
1712
try:
1713
client = ProxyClient(child_pipe, fpr,
1714
self.client_address)
1715
except KeyError:
1716
return
1717
1718
if client.approval_delay:
1719
delay = client.approval_delay
1720
client.approvals_pending += 1
1721
approval_required = True
1722
1723
while True:
1724
if not client.enabled:
1725
logger.info("Client %s is disabled",
1726
client.name)
1727
if self.server.use_dbus:
1728
# Emit D-Bus signal
1729
client.Rejected("Disabled")
1730
return
1731
1732
if client.approved or not client.approval_delay:
1733
#We are approved or approval is disabled
1734
break
1735
elif client.approved is None:
1736
logger.info("Client %s needs approval",
1737
client.name)
1738
if self.server.use_dbus:
1739
# Emit D-Bus signal
1740
client.NeedApproval(
1741
client.approval_delay_milliseconds(),
1742
client.approved_by_default)
1743
else:
1744
logger.warning("Client %s was not approved",
1745
client.name)
1746
if self.server.use_dbus:
1747
# Emit D-Bus signal
1748
client.Rejected("Denied")
1749
return
1750
1751
#wait until timeout or approved
1752
time = datetime.datetime.now()
1753
client.changedstate.acquire()
1754
client.changedstate.wait(
1755
float(timedelta_to_milliseconds(delay)
1756
/ 1000))
1757
client.changedstate.release()
1758
time2 = datetime.datetime.now()
1759
if (time2 - time) >= delay:
1760
if not client.approved_by_default:
1761
logger.warning("Client %s timed out while"
1762
" waiting for approval",
1763
client.name)
1764
if self.server.use_dbus:
1765
# Emit D-Bus signal
1766
client.Rejected("Approval timed out")
1767
return
1768
else:
1769
break
1770
else:
1771
delay -= time2 - time
1772
1773
sent_size = 0
1774
while sent_size < len(client.secret):
1775
try:
1776
sent = session.send(client.secret[sent_size:])
1777
except gnutls.errors.GNUTLSError as error:
1778
logger.warning("gnutls send failed",
1779
exc_info=error)
1780
return
1781
logger.debug("Sent: %d, remaining: %d",
1782
sent, len(client.secret)
1783
- (sent_size + sent))
1784
sent_size += sent
1785
1786
logger.info("Sending secret to %s", client.name)
1787
# bump the timeout using extended_timeout
1788
client.bump_timeout(client.extended_timeout)
1789
if self.server.use_dbus:
1790
# Emit D-Bus signal
1791
client.GotSecret()
1792
1793
finally:
1794
if approval_required:
1795
client.approvals_pending -= 1
1796
try:
1797
session.bye()
1798
except gnutls.errors.GNUTLSError as error:
1799
logger.warning("GnuTLS bye failed",
1800
exc_info=error)
1801
1802
@staticmethod
1803
def peer_certificate(session):
1804
"Return the peer's OpenPGP certificate as a bytestring"
1805
# If not an OpenPGP certificate...
1806
if (gnutls.library.functions
1807
.gnutls_certificate_type_get(session._c_object)
1808
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1809
# ...do the normal thing
1810
return session.peer_certificate
1811
list_size = ctypes.c_uint(1)
1812
cert_list = (gnutls.library.functions
1813
.gnutls_certificate_get_peers
1814
(session._c_object, ctypes.byref(list_size)))
1815
if not bool(cert_list) and list_size.value != 0:
1816
raise gnutls.errors.GNUTLSError("error getting peer"
1817
" certificate")
1818
if list_size.value == 0:
1819
return None
1820
cert = cert_list[0]
1821
return ctypes.string_at(cert.data, cert.size)
1822
1823
@staticmethod
1824
def fingerprint(openpgp):
1825
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1826
# New GnuTLS "datum" with the OpenPGP public key
1827
datum = (gnutls.library.types
1828
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1829
ctypes.POINTER
1830
(ctypes.c_ubyte)),
1831
ctypes.c_uint(len(openpgp))))
1832
# New empty GnuTLS certificate
1833
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1834
(gnutls.library.functions
1835
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1836
# Import the OpenPGP public key into the certificate
1837
(gnutls.library.functions
1838
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1839
gnutls.library.constants
1840
.GNUTLS_OPENPGP_FMT_RAW))
1841
# Verify the self signature in the key
1842
crtverify = ctypes.c_uint()
1843
(gnutls.library.functions
1844
.gnutls_openpgp_crt_verify_self(crt, 0,
1845
ctypes.byref(crtverify)))
1846
if crtverify.value != 0:
1847
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1848
raise (gnutls.errors.CertificateSecurityError
1849
("Verify failed"))
1850
# New buffer for the fingerprint
1851
buf = ctypes.create_string_buffer(20)
1852
buf_len = ctypes.c_size_t()
1853
# Get the fingerprint from the certificate into the buffer
1854
(gnutls.library.functions
1855
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1856
ctypes.byref(buf_len)))
1857
# Deinit the certificate
1858
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1859
# Convert the buffer to a Python bytestring
1860
fpr = ctypes.string_at(buf, buf_len.value)
1861
# Convert the bytestring to hexadecimal notation
1862
hex_fpr = binascii.hexlify(fpr).upper()
1863
return hex_fpr
1864
1865
1866
class MultiprocessingMixIn(object):
1867
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1868
def sub_process_main(self, request, address):
1869
try:
1870
self.finish_request(request, address)
1871
except Exception:
1872
self.handle_error(request, address)
1873
self.close_request(request)
1874
1875
def process_request(self, request, address):
1876
"""Start a new process to process the request."""
1877
proc = multiprocessing.Process(target = self.sub_process_main,
1878
args = (request, address))
1879
proc.start()
1880
return proc
1881
1882
1883
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1884
""" adds a pipe to the MixIn """
1885
def process_request(self, request, client_address):
1886
"""Overrides and wraps the original process_request().
1887
1888
This function creates a new pipe in self.pipe
1889
"""
1890
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1891
1892
proc = MultiprocessingMixIn.process_request(self, request,
1893
client_address)
1894
self.child_pipe.close()
1895
self.add_pipe(parent_pipe, proc)
1896
1897
def add_pipe(self, parent_pipe, proc):
1898
"""Dummy function; override as necessary"""
1899
raise NotImplementedError
1900
1901
1902
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1903
socketserver.TCPServer, object):
1904
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1905
730
1906
Attributes:
731
settings: Server settings
732
clients: Set() of Client objects
733
1907
enabled: Boolean; whether this server is activated yet
1908
interface: None or a network interface name (string)
1909
use_ipv6: Boolean; to use IPv6 or not
734
1910
"""
735
address_family = socket.AF_INET6
736
def __init__(self, *args, **kwargs):
737
if "settings" in kwargs:
738
self.settings = kwargs["settings"]
739
del kwargs["settings"]
740
if "clients" in kwargs:
741
self.clients = kwargs["clients"]
742
del kwargs["clients"]
743
self.enabled = False
744
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1911
def __init__(self, server_address, RequestHandlerClass,
1912
interface=None, use_ipv6=True, socketfd=None):
1913
"""If socketfd is set, use that file descriptor instead of
1914
creating a new one with socket.socket().
1915
"""
1916
self.interface = interface
1917
if use_ipv6:
1918
self.address_family = socket.AF_INET6
1919
if socketfd is not None:
1920
# Save the file descriptor
1921
self.socketfd = socketfd
1922
# Save the original socket.socket() function
1923
self.socket_socket = socket.socket
1924
# To implement --socket, we monkey patch socket.socket.
1925
#
1926
# (When socketserver.TCPServer is a new-style class, we
1927
# could make self.socket into a property instead of monkey
1928
# patching socket.socket.)
1929
#
1930
# Create a one-time-only replacement for socket.socket()
1931
@functools.wraps(socket.socket)
1932
def socket_wrapper(*args, **kwargs):
1933
# Restore original function so subsequent calls are
1934
# not affected.
1935
socket.socket = self.socket_socket
1936
del self.socket_socket
1937
# This time only, return a new socket object from the
1938
# saved file descriptor.
1939
return socket.fromfd(self.socketfd, *args, **kwargs)
1940
# Replace socket.socket() function with wrapper
1941
socket.socket = socket_wrapper
1942
# The socketserver.TCPServer.__init__ will call
1943
# socket.socket(), which might be our replacement,
1944
# socket_wrapper(), if socketfd was set.
1945
socketserver.TCPServer.__init__(self, server_address,
1946
RequestHandlerClass)
1947
745
1948
def server_bind(self):
746
1949
"""This overrides the normal server_bind() function
747
1950
to bind to an interface if one was specified, and also NOT to
748
1951
bind to an address or port if they were not specified."""
749
if self.settings["interface"]:
750
# 25 is from /usr/include/asm-i486/socket.h
751
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
752
try:
753
self.socket.setsockopt(socket.SOL_SOCKET,
754
SO_BINDTODEVICE,
755
self.settings["interface"])
756
except socket.error, error:
757
if error[0] == errno.EPERM:
758
logger.error(u"No permission to"
759
u" bind to interface %s",
760
self.settings["interface"])
761
else:
762
raise error
1952
if self.interface is not None:
1953
if SO_BINDTODEVICE is None:
1954
logger.error("SO_BINDTODEVICE does not exist;"
1955
" cannot bind to interface %s",
1956
self.interface)
1957
else:
1958
try:
1959
self.socket.setsockopt(socket.SOL_SOCKET,
1960
SO_BINDTODEVICE,
1961
str(self.interface + '\0'))
1962
except socket.error as error:
1963
if error.errno == errno.EPERM:
1964
logger.error("No permission to bind to"
1965
" interface %s", self.interface)
1966
elif error.errno == errno.ENOPROTOOPT:
1967
logger.error("SO_BINDTODEVICE not available;"
1968
" cannot bind to interface %s",
1969
self.interface)
1970
elif error.errno == errno.ENODEV:
1971
logger.error("Interface %s does not exist,"
1972
" cannot bind", self.interface)
1973
else:
1974
raise
763
1975
# Only bind(2) the socket if we really need to.
764
1976
if self.server_address[0] or self.server_address[1]:
765
1977
if not self.server_address[0]:
766
in6addr_any = "::"
767
self.server_address = (in6addr_any,
1978
if self.address_family == socket.AF_INET6:
1979
any_address = "::" # in6addr_any
1980
else:
1981
any_address = socket.INADDR_ANY
1982
self.server_address = (any_address,
768
1983
self.server_address[1])
769
1984
elif not self.server_address[1]:
770
1985
self.server_address = (self.server_address[0],
771
1986
0)
772
# if self.settings["interface"]:
1987
# if self.interface:
773
1988
# self.server_address = (self.server_address[0],
774
1989
# 0, # port
775
1990
# 0, # flowinfo
776
1991
# if_nametoindex
777
# (self.settings
778
# ["interface"]))
779
return super(IPv6_TCPServer, self).server_bind()
1992
# (self.interface))
1993
return socketserver.TCPServer.server_bind(self)
1994
1995
1996
class MandosServer(IPv6_TCPServer):
1997
"""Mandos server.
1998
1999
Attributes:
2000
clients: set of Client objects
2001
gnutls_priority GnuTLS priority string
2002
use_dbus: Boolean; to emit D-Bus signals or not
2003
2004
Assumes a gobject.MainLoop event loop.
2005
"""
2006
def __init__(self, server_address, RequestHandlerClass,
2007
interface=None, use_ipv6=True, clients=None,
2008
gnutls_priority=None, use_dbus=True, socketfd=None):
2009
self.enabled = False
2010
self.clients = clients
2011
if self.clients is None:
2012
self.clients = {}
2013
self.use_dbus = use_dbus
2014
self.gnutls_priority = gnutls_priority
2015
IPv6_TCPServer.__init__(self, server_address,
2016
RequestHandlerClass,
2017
interface = interface,
2018
use_ipv6 = use_ipv6,
2019
socketfd = socketfd)
780
2020
def server_activate(self):
781
2021
if self.enabled:
782
return super(IPv6_TCPServer, self).server_activate()
2022
return socketserver.TCPServer.server_activate(self)
2023
783
2024
def enable(self):
784
2025
self.enabled = True
2026
2027
def add_pipe(self, parent_pipe, proc):
2028
# Call "handle_ipc" for both data and EOF events
2029
gobject.io_add_watch(parent_pipe.fileno(),
2030
gobject.IO_IN | gobject.IO_HUP,
2031
functools.partial(self.handle_ipc,
2032
parent_pipe =
2033
parent_pipe,
2034
proc = proc))
2035
2036
def handle_ipc(self, source, condition, parent_pipe=None,
2037
proc = None, client_object=None):
2038
# error, or the other end of multiprocessing.Pipe has closed
2039
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2040
# Wait for other process to exit
2041
proc.join()
2042
return False
2043
2044
# Read a request from the child
2045
request = parent_pipe.recv()
2046
command = request[0]
2047
2048
if command == 'init':
2049
fpr = request[1]
2050
address = request[2]
2051
2052
for c in self.clients.itervalues():
2053
if c.fingerprint == fpr:
2054
client = c
2055
break
2056
else:
2057
logger.info("Client not found for fingerprint: %s, ad"
2058
"dress: %s", fpr, address)
2059
if self.use_dbus:
2060
# Emit D-Bus signal
2061
mandos_dbus_service.ClientNotFound(fpr,
2062
address[0])
2063
parent_pipe.send(False)
2064
return False
2065
2066
gobject.io_add_watch(parent_pipe.fileno(),
2067
gobject.IO_IN | gobject.IO_HUP,
2068
functools.partial(self.handle_ipc,
2069
parent_pipe =
2070
parent_pipe,
2071
proc = proc,
2072
client_object =
2073
client))
2074
parent_pipe.send(True)
2075
# remove the old hook in favor of the new above hook on
2076
# same fileno
2077
return False
2078
if command == 'funcall':
2079
funcname = request[1]
2080
args = request[2]
2081
kwargs = request[3]
2082
2083
parent_pipe.send(('data', getattr(client_object,
2084
funcname)(*args,
2085
**kwargs)))
2086
2087
if command == 'getattr':
2088
attrname = request[1]
2089
if callable(client_object.__getattribute__(attrname)):
2090
parent_pipe.send(('function',))
2091
else:
2092
parent_pipe.send(('data', client_object
2093
.__getattribute__(attrname)))
2094
2095
if command == 'setattr':
2096
attrname = request[1]
2097
value = request[2]
2098
setattr(client_object, attrname, value)
2099
2100
return True
2101
2102
2103
def rfc3339_duration_to_delta(duration):
2104
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2105
2106
>>> rfc3339_duration_to_delta("P7D")
2107
datetime.timedelta(7)
2108
>>> rfc3339_duration_to_delta("PT60S")
2109
datetime.timedelta(0, 60)
2110
>>> rfc3339_duration_to_delta("PT60M")
2111
datetime.timedelta(0, 3600)
2112
>>> rfc3339_duration_to_delta("PT24H")
2113
datetime.timedelta(1)
2114
>>> rfc3339_duration_to_delta("P1W")
2115
datetime.timedelta(7)
2116
>>> rfc3339_duration_to_delta("PT5M30S")
2117
datetime.timedelta(0, 330)
2118
>>> rfc3339_duration_to_delta("P1DT3M20S")
2119
datetime.timedelta(1, 200)
2120
"""
2121
2122
# Parsing an RFC 3339 duration with regular expressions is not
2123
# possible - there would have to be multiple places for the same
2124
# values, like seconds. The current code, while more esoteric, is
2125
# cleaner without depending on a parsing library. If Python had a
2126
# built-in library for parsing we would use it, but we'd like to
2127
# avoid excessive use of external libraries.
2128
2129
# New type for defining tokens, syntax, and semantics all-in-one
2130
Token = collections.namedtuple("Token",
2131
("regexp", # To match token; if
2132
# "value" is not None,
2133
# must have a "group"
2134
# containing digits
2135
"value", # datetime.timedelta or
2136
# None
2137
"followers")) # Tokens valid after
2138
# this token
2139
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2140
# the "duration" ABNF definition in RFC 3339, Appendix A.
2141
token_end = Token(re.compile(r"$"), None, frozenset())
2142
token_second = Token(re.compile(r"(\d+)S"),
2143
datetime.timedelta(seconds=1),
2144
frozenset((token_end,)))
2145
token_minute = Token(re.compile(r"(\d+)M"),
2146
datetime.timedelta(minutes=1),
2147
frozenset((token_second, token_end)))
2148
token_hour = Token(re.compile(r"(\d+)H"),
2149
datetime.timedelta(hours=1),
2150
frozenset((token_minute, token_end)))
2151
token_time = Token(re.compile(r"T"),
2152
None,
2153
frozenset((token_hour, token_minute,
2154
token_second)))
2155
token_day = Token(re.compile(r"(\d+)D"),
2156
datetime.timedelta(days=1),
2157
frozenset((token_time, token_end)))
2158
token_month = Token(re.compile(r"(\d+)M"),
2159
datetime.timedelta(weeks=4),
2160
frozenset((token_day, token_end)))
2161
token_year = Token(re.compile(r"(\d+)Y"),
2162
datetime.timedelta(weeks=52),
2163
frozenset((token_month, token_end)))
2164
token_week = Token(re.compile(r"(\d+)W"),
2165
datetime.timedelta(weeks=1),
2166
frozenset((token_end,)))
2167
token_duration = Token(re.compile(r"P"), None,
2168
frozenset((token_year, token_month,
2169
token_day, token_time,
2170
token_week))),
2171
# Define starting values
2172
value = datetime.timedelta() # Value so far
2173
found_token = None
2174
followers = frozenset(token_duration,) # Following valid tokens
2175
s = duration # String left to parse
2176
# Loop until end token is found
2177
while found_token is not token_end:
2178
# Search for any currently valid tokens
2179
for token in followers:
2180
match = token.regexp.match(s)
2181
if match is not None:
2182
# Token found
2183
if token.value is not None:
2184
# Value found, parse digits
2185
factor = int(match.group(1), 10)
2186
# Add to value so far
2187
value += factor * token.value
2188
# Strip token from string
2189
s = token.regexp.sub("", s, 1)
2190
# Go to found token
2191
found_token = token
2192
# Set valid next tokens
2193
followers = found_token.followers
2194
break
2195
else:
2196
# No currently valid tokens were found
2197
raise ValueError("Invalid RFC 3339 duration")
2198
# End token found
2199
return value
785
2200
786
2201
787
2202
def string_to_delta(interval):
788
2203
"""Parse a string and return a datetime.timedelta
789
2204
790
2205
>>> string_to_delta('7d')
791
2206
datetime.timedelta(7)
792
2207
>>> string_to_delta('60s')
795
2210
datetime.timedelta(0, 3600)
796
2211
>>> string_to_delta('24h')
797
2212
datetime.timedelta(1)
798
>>> string_to_delta(u'1w')
2213
>>> string_to_delta('1w')
799
2214
datetime.timedelta(7)
800
2215
>>> string_to_delta('5m 30s')
801
2216
datetime.timedelta(0, 330)
802
2217
"""
2218
2219
try:
2220
return rfc3339_duration_to_delta(interval)
2221
except ValueError:
2222
pass
2223
803
2224
timevalue = datetime.timedelta(0)
804
2225
for s in interval.split():
805
2226
try:
806
2227
suffix = unicode(s[-1])
807
2228
value = int(s[:-1])
808
if suffix == u"d":
2229
if suffix == "d":
809
2230
delta = datetime.timedelta(value)
810
elif suffix == u"s":
2231
elif suffix == "s":
811
2232
delta = datetime.timedelta(0, value)
812
elif suffix == u"m":
2233
elif suffix == "m":
813
2234
delta = datetime.timedelta(0, 0, 0, 0, value)
814
elif suffix == u"h":
2235
elif suffix == "h":
815
2236
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
816
elif suffix == u"w":
2237
elif suffix == "w":
817
2238
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
818
2239
else:
819
raise ValueError
820
except (ValueError, IndexError):
821
raise ValueError
2240
raise ValueError("Unknown suffix {0!r}"
2241
.format(suffix))
2242
except (ValueError, IndexError) as e:
2243
raise ValueError(*(e.args))
822
2244
timevalue += delta
823
2245
return timevalue
824
2246
825
2247
826
def server_state_changed(state):
827
"""Derived from the Avahi example code"""
828
if state == avahi.SERVER_COLLISION:
829
logger.error(u"Zeroconf server name collision")
830
service.remove()
831
elif state == avahi.SERVER_RUNNING:
832
service.add()
833
834
835
def entry_group_state_changed(state, error):
836
"""Derived from the Avahi example code"""
837
logger.debug(u"Avahi state change: %i", state)
838
839
if state == avahi.ENTRY_GROUP_ESTABLISHED:
840
logger.debug(u"Zeroconf service established.")
841
elif state == avahi.ENTRY_GROUP_COLLISION:
842
logger.warning(u"Zeroconf service name collision.")
843
service.rename()
844
elif state == avahi.ENTRY_GROUP_FAILURE:
845
logger.critical(u"Avahi: Error in group state changed %s",
846
unicode(error))
847
raise AvahiGroupError(u"State changed: %s" % unicode(error))
848
849
def if_nametoindex(interface):
850
"""Call the C function if_nametoindex(), or equivalent"""
851
global if_nametoindex
852
try:
853
if_nametoindex = (ctypes.cdll.LoadLibrary
854
(ctypes.util.find_library("c"))
855
.if_nametoindex)
856
except (OSError, AttributeError):
857
if "struct" not in sys.modules:
858
import struct
859
if "fcntl" not in sys.modules:
860
import fcntl
861
def if_nametoindex(interface):
862
"Get an interface index the hard way, i.e. using fcntl()"
863
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
864
with closing(socket.socket()) as s:
865
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
866
struct.pack("16s16x", interface))
867
interface_index = struct.unpack("I", ifreq[16:20])[0]
868
return interface_index
869
return if_nametoindex(interface)
870
871
872
2248
def daemon(nochdir = False, noclose = False):
873
2249
"""See daemon(3). Standard BSD Unix function.
2250
874
2251
This should really exist as os.daemon, but it doesn't (yet)."""
875
2252
if os.fork():
876
2253
sys.exit()
881
2258
sys.exit()
882
2259
if not noclose:
883
2260
# Close all standard open file descriptors
884
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2261
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
885
2262
if not stat.S_ISCHR(os.fstat(null).st_mode):
886
2263
raise OSError(errno.ENODEV,
887
"/dev/null not a character device")
2264
"{0} not a character device"
2265
.format(os.devnull))
888
2266
os.dup2(null, sys.stdin.fileno())
889
2267
os.dup2(null, sys.stdout.fileno())
890
2268
os.dup2(null, sys.stderr.fileno())
893
2271
894
2272
895
2273
def main():
896
parser = optparse.OptionParser(version = "%%prog %s" % version)
897
parser.add_option("-i", "--interface", type="string",
898
metavar="IF", help="Bind to interface IF")
899
parser.add_option("-a", "--address", type="string",
900
help="Address to listen for requests on")
901
parser.add_option("-p", "--port", type="int",
902
help="Port number to receive requests on")
903
parser.add_option("--check", action="store_true",
904
help="Run self-test")
905
parser.add_option("--debug", action="store_true",
906
help="Debug mode; run in foreground and log to"
907
" terminal")
908
parser.add_option("--priority", type="string", help="GnuTLS"
909
" priority string (see GnuTLS documentation)")
910
parser.add_option("--servicename", type="string", metavar="NAME",
911
help="Zeroconf service name")
912
parser.add_option("--configdir", type="string",
913
default="/etc/mandos", metavar="DIR",
914
help="Directory to search for configuration"
915
" files")
916
parser.add_option("--no-dbus", action="store_false",
917
dest="use_dbus",
918
help="Do not provide D-Bus system bus"
919
" interface")
920
options = parser.parse_args()[0]
2274
2275
##################################################################
2276
# Parsing of options, both command line and config file
2277
2278
parser = argparse.ArgumentParser()
2279
parser.add_argument("-v", "--version", action="version",
2280
version = "%(prog)s {0}".format(version),
2281
help="show version number and exit")
2282
parser.add_argument("-i", "--interface", metavar="IF",
2283
help="Bind to interface IF")
2284
parser.add_argument("-a", "--address",
2285
help="Address to listen for requests on")
2286
parser.add_argument("-p", "--port", type=int,
2287
help="Port number to receive requests on")
2288
parser.add_argument("--check", action="store_true",
2289
help="Run self-test")
2290
parser.add_argument("--debug", action="store_true",
2291
help="Debug mode; run in foreground and log"
2292
" to terminal")
2293
parser.add_argument("--debuglevel", metavar="LEVEL",
2294
help="Debug level for stdout output")
2295
parser.add_argument("--priority", help="GnuTLS"
2296
" priority string (see GnuTLS documentation)")
2297
parser.add_argument("--servicename",
2298
metavar="NAME", help="Zeroconf service name")
2299
parser.add_argument("--configdir",
2300
default="/etc/mandos", metavar="DIR",
2301
help="Directory to search for configuration"
2302
" files")
2303
parser.add_argument("--no-dbus", action="store_false",
2304
dest="use_dbus", help="Do not provide D-Bus"
2305
" system bus interface")
2306
parser.add_argument("--no-ipv6", action="store_false",
2307
dest="use_ipv6", help="Do not use IPv6")
2308
parser.add_argument("--no-restore", action="store_false",
2309
dest="restore", help="Do not restore stored"
2310
" state")
2311
parser.add_argument("--socket", type=int,
2312
help="Specify a file descriptor to a network"
2313
" socket to use instead of creating one")
2314
parser.add_argument("--statedir", metavar="DIR",
2315
help="Directory to save/restore state in")
2316
parser.add_argument("--foreground", action="store_true",
2317
help="Run in foreground")
2318
2319
options = parser.parse_args()
921
2320
922
2321
if options.check:
923
2322
import doctest
933
2332
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
934
2333
"servicename": "Mandos",
935
2334
"use_dbus": "True",
2335
"use_ipv6": "True",
2336
"debuglevel": "",
2337
"restore": "True",
2338
"socket": "",
2339
"statedir": "/var/lib/mandos",
2340
"foreground": "False",
936
2341
}
937
2342
938
2343
# Parse config file for server-global settings
939
server_config = ConfigParser.SafeConfigParser(server_defaults)
2344
server_config = configparser.SafeConfigParser(server_defaults)
940
2345
del server_defaults
941
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2346
server_config.read(os.path.join(options.configdir,
2347
"mandos.conf"))
942
2348
# Convert the SafeConfigParser object to a dict
943
2349
server_settings = server_config.defaults()
944
2350
# Use the appropriate methods on the non-string config options
945
server_settings["debug"] = server_config.getboolean("DEFAULT",
946
"debug")
947
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
948
"use_dbus")
2351
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2352
server_settings[option] = server_config.getboolean("DEFAULT",
2353
option)
949
2354
if server_settings["port"]:
950
2355
server_settings["port"] = server_config.getint("DEFAULT",
951
2356
"port")
2357
if server_settings["socket"]:
2358
server_settings["socket"] = server_config.getint("DEFAULT",
2359
"socket")
2360
# Later, stdin will, and stdout and stderr might, be dup'ed
2361
# over with an opened os.devnull. But we don't want this to
2362
# happen with a supplied network socket.
2363
if 0 <= server_settings["socket"] <= 2:
2364
server_settings["socket"] = os.dup(server_settings
2365
["socket"])
952
2366
del server_config
953
2367
954
2368
# Override the settings from the config file with command line
955
2369
# options, if set.
956
2370
for option in ("interface", "address", "port", "debug",
957
2371
"priority", "servicename", "configdir",
958
"use_dbus"):
2372
"use_dbus", "use_ipv6", "debuglevel", "restore",
2373
"statedir", "socket", "foreground"):
959
2374
value = getattr(options, option)
960
2375
if value is not None:
961
2376
server_settings[option] = value
962
2377
del options
2378
# Force all strings to be unicode
2379
for option in server_settings.keys():
2380
if type(server_settings[option]) is str:
2381
server_settings[option] = unicode(server_settings[option])
2382
# Debug implies foreground
2383
if server_settings["debug"]:
2384
server_settings["foreground"] = True
963
2385
# Now we have our good server settings in "server_settings"
964
2386
2387
##################################################################
2388
965
2389
# For convenience
966
2390
debug = server_settings["debug"]
2391
debuglevel = server_settings["debuglevel"]
967
2392
use_dbus = server_settings["use_dbus"]
2393
use_ipv6 = server_settings["use_ipv6"]
2394
stored_state_path = os.path.join(server_settings["statedir"],
2395
stored_state_file)
2396
foreground = server_settings["foreground"]
968
2397
969
if not debug:
970
syslogger.setLevel(logging.WARNING)
971
console.setLevel(logging.WARNING)
2398
if debug:
2399
initlogger(debug, logging.DEBUG)
2400
else:
2401
if not debuglevel:
2402
initlogger(debug)
2403
else:
2404
level = getattr(logging, debuglevel.upper())
2405
initlogger(debug, level)
972
2406
973
2407
if server_settings["servicename"] != "Mandos":
974
2408
syslogger.setFormatter(logging.Formatter
975
('Mandos (%s): %%(levelname)s:'
976
' %%(message)s'
977
% server_settings["servicename"]))
2409
('Mandos ({0}) [%(process)d]:'
2410
' %(levelname)s: %(message)s'
2411
.format(server_settings
2412
["servicename"])))
978
2413
979
2414
# Parse config file with clients
980
client_defaults = { "timeout": "1h",
981
"interval": "5m",
982
"checker": "fping -q -- %%(host)s",
983
"host": "",
984
}
985
client_config = ConfigParser.SafeConfigParser(client_defaults)
2415
client_config = configparser.SafeConfigParser(Client
2416
.client_defaults)
986
2417
client_config.read(os.path.join(server_settings["configdir"],
987
2418
"clients.conf"))
988
2419
989
clients = Set()
990
tcp_server = IPv6_TCPServer((server_settings["address"],
991
server_settings["port"]),
992
TCP_handler,
993
settings=server_settings,
994
clients=clients)
995
pidfilename = "/var/run/mandos.pid"
996
try:
997
pidfile = open(pidfilename, "w")
998
except IOError, error:
999
logger.error("Could not open file %r", pidfilename)
1000
1001
try:
1002
uid = pwd.getpwnam("_mandos").pw_uid
1003
gid = pwd.getpwnam("_mandos").pw_gid
1004
except KeyError:
1005
try:
1006
uid = pwd.getpwnam("mandos").pw_uid
1007
gid = pwd.getpwnam("mandos").pw_gid
2420
global mandos_dbus_service
2421
mandos_dbus_service = None
2422
2423
tcp_server = MandosServer((server_settings["address"],
2424
server_settings["port"]),
2425
ClientHandler,
2426
interface=(server_settings["interface"]
2427
or None),
2428
use_ipv6=use_ipv6,
2429
gnutls_priority=
2430
server_settings["priority"],
2431
use_dbus=use_dbus,
2432
socketfd=(server_settings["socket"]
2433
or None))
2434
if not foreground:
2435
pidfilename = "/var/run/mandos.pid"
2436
pidfile = None
2437
try:
2438
pidfile = open(pidfilename, "w")
2439
except IOError as e:
2440
logger.error("Could not open file %r", pidfilename,
2441
exc_info=e)
2442
2443
for name in ("_mandos", "mandos", "nobody"):
2444
try:
2445
uid = pwd.getpwnam(name).pw_uid
2446
gid = pwd.getpwnam(name).pw_gid
2447
break
1008
2448
except KeyError:
1009
try:
1010
uid = pwd.getpwnam("nobody").pw_uid
1011
gid = pwd.getpwnam("nogroup").pw_gid
1012
except KeyError:
1013
uid = 65534
1014
gid = 65534
2449
continue
2450
else:
2451
uid = 65534
2452
gid = 65534
1015
2453
try:
2454
os.setgid(gid)
1016
2455
os.setuid(uid)
1017
os.setgid(gid)
1018
except OSError, error:
1019
if error[0] != errno.EPERM:
2456
except OSError as error:
2457
if error.errno != errno.EPERM:
1020
2458
raise error
1021
2459
1022
global service
1023
service = AvahiService(name = server_settings["servicename"],
1024
servicetype = "_mandos._tcp", )
1025
if server_settings["interface"]:
1026
service.interface = (if_nametoindex
1027
(server_settings["interface"]))
2460
if debug:
2461
# Enable all possible GnuTLS debugging
2462
2463
# "Use a log level over 10 to enable all debugging options."
2464
# - GnuTLS manual
2465
gnutls.library.functions.gnutls_global_set_log_level(11)
2466
2467
@gnutls.library.types.gnutls_log_func
2468
def debug_gnutls(level, string):
2469
logger.debug("GnuTLS: %s", string[:-1])
2470
2471
(gnutls.library.functions
2472
.gnutls_global_set_log_function(debug_gnutls))
2473
2474
# Redirect stdin so all checkers get /dev/null
2475
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2476
os.dup2(null, sys.stdin.fileno())
2477
if null > 2:
2478
os.close(null)
2479
2480
# Need to fork before connecting to D-Bus
2481
if not foreground:
2482
# Close all input and output, do double fork, etc.
2483
daemon()
2484
2485
# multiprocessing will use threads, so before we use gobject we
2486
# need to inform gobject that threads will be used.
2487
gobject.threads_init()
1028
2488
1029
2489
global main_loop
1030
global bus
1031
global server
1032
2490
# From the Avahi example code
1033
DBusGMainLoop(set_as_default=True )
2491
DBusGMainLoop(set_as_default=True)
1034
2492
main_loop = gobject.MainLoop()
1035
2493
bus = dbus.SystemBus()
1036
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1037
avahi.DBUS_PATH_SERVER),
1038
avahi.DBUS_INTERFACE_SERVER)
1039
2494
# End of Avahi example code
1040
2495
if use_dbus:
1041
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1042
1043
clients.update(Set(Client(name = section,
1044
config
1045
= dict(client_config.items(section)),
1046
use_dbus = use_dbus)
1047
for section in client_config.sections()))
1048
if not clients:
1049
logger.warning(u"No clients defined")
1050
1051
if debug:
1052
# Redirect stdin so all checkers get /dev/null
1053
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1054
os.dup2(null, sys.stdin.fileno())
1055
if null > 2:
1056
os.close(null)
1057
else:
1058
# No console logging
1059
logger.removeHandler(console)
1060
# Close all input and output, do double fork, etc.
1061
daemon()
1062
1063
try:
1064
pid = os.getpid()
1065
pidfile.write(str(pid) + "\n")
1066
pidfile.close()
2496
try:
2497
bus_name = dbus.service.BusName("se.recompile.Mandos",
2498
bus, do_not_queue=True)
2499
old_bus_name = (dbus.service.BusName
2500
("se.bsnet.fukt.Mandos", bus,
2501
do_not_queue=True))
2502
except dbus.exceptions.NameExistsException as e:
2503
logger.error("Disabling D-Bus:", exc_info=e)
2504
use_dbus = False
2505
server_settings["use_dbus"] = False
2506
tcp_server.use_dbus = False
2507
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2508
service = AvahiServiceToSyslog(name =
2509
server_settings["servicename"],
2510
servicetype = "_mandos._tcp",
2511
protocol = protocol, bus = bus)
2512
if server_settings["interface"]:
2513
service.interface = (if_nametoindex
2514
(str(server_settings["interface"])))
2515
2516
global multiprocessing_manager
2517
multiprocessing_manager = multiprocessing.Manager()
2518
2519
client_class = Client
2520
if use_dbus:
2521
client_class = functools.partial(ClientDBus, bus = bus)
2522
2523
client_settings = Client.config_parser(client_config)
2524
old_client_settings = {}
2525
clients_data = {}
2526
2527
# Get client data and settings from last running state.
2528
if server_settings["restore"]:
2529
try:
2530
with open(stored_state_path, "rb") as stored_state:
2531
clients_data, old_client_settings = (pickle.load
2532
(stored_state))
2533
os.remove(stored_state_path)
2534
except IOError as e:
2535
if e.errno == errno.ENOENT:
2536
logger.warning("Could not load persistent state: {0}"
2537
.format(os.strerror(e.errno)))
2538
else:
2539
logger.critical("Could not load persistent state:",
2540
exc_info=e)
2541
raise
2542
except EOFError as e:
2543
logger.warning("Could not load persistent state: "
2544
"EOFError:", exc_info=e)
2545
2546
with PGPEngine() as pgp:
2547
for client_name, client in clients_data.iteritems():
2548
# Decide which value to use after restoring saved state.
2549
# We have three different values: Old config file,
2550
# new config file, and saved state.
2551
# New config value takes precedence if it differs from old
2552
# config value, otherwise use saved state.
2553
for name, value in client_settings[client_name].items():
2554
try:
2555
# For each value in new config, check if it
2556
# differs from the old config value (Except for
2557
# the "secret" attribute)
2558
if (name != "secret" and
2559
value != old_client_settings[client_name]
2560
[name]):
2561
client[name] = value
2562
except KeyError:
2563
pass
2564
2565
# Clients who has passed its expire date can still be
2566
# enabled if its last checker was successful. Clients
2567
# whose checker succeeded before we stored its state is
2568
# assumed to have successfully run all checkers during
2569
# downtime.
2570
if client["enabled"]:
2571
if datetime.datetime.utcnow() >= client["expires"]:
2572
if not client["last_checked_ok"]:
2573
logger.warning(
2574
"disabling client {0} - Client never "
2575
"performed a successful checker"
2576
.format(client_name))
2577
client["enabled"] = False
2578
elif client["last_checker_status"] != 0:
2579
logger.warning(
2580
"disabling client {0} - Client "
2581
"last checker failed with error code {1}"
2582
.format(client_name,
2583
client["last_checker_status"]))
2584
client["enabled"] = False
2585
else:
2586
client["expires"] = (datetime.datetime
2587
.utcnow()
2588
+ client["timeout"])
2589
logger.debug("Last checker succeeded,"
2590
" keeping {0} enabled"
2591
.format(client_name))
2592
try:
2593
client["secret"] = (
2594
pgp.decrypt(client["encrypted_secret"],
2595
client_settings[client_name]
2596
["secret"]))
2597
except PGPError:
2598
# If decryption fails, we use secret from new settings
2599
logger.debug("Failed to decrypt {0} old secret"
2600
.format(client_name))
2601
client["secret"] = (
2602
client_settings[client_name]["secret"])
2603
2604
# Add/remove clients based on new changes made to config
2605
for client_name in (set(old_client_settings)
2606
- set(client_settings)):
2607
del clients_data[client_name]
2608
for client_name in (set(client_settings)
2609
- set(old_client_settings)):
2610
clients_data[client_name] = client_settings[client_name]
2611
2612
# Create all client objects
2613
for client_name, client in clients_data.iteritems():
2614
tcp_server.clients[client_name] = client_class(
2615
name = client_name, settings = client)
2616
2617
if not tcp_server.clients:
2618
logger.warning("No clients defined")
2619
2620
if not foreground:
2621
if pidfile is not None:
2622
try:
2623
with pidfile:
2624
pid = os.getpid()
2625
pidfile.write(str(pid) + "\n".encode("utf-8"))
2626
except IOError:
2627
logger.error("Could not write to file %r with PID %d",
2628
pidfilename, pid)
1067
2629
del pidfile
1068
except IOError:
1069
logger.error(u"Could not write to file %r with PID %d",
1070
pidfilename, pid)
1071
except NameError:
1072
# "pidfile" was never created
1073
pass
1074
del pidfilename
1075
1076
def cleanup():
1077
"Cleanup function; run on exit"
1078
global group
1079
# From the Avahi example code
1080
if not group is None:
1081
group.Free()
1082
group = None
1083
# End of Avahi example code
1084
1085
while clients:
1086
client = clients.pop()
1087
client.disable_hook = None
1088
client.disable()
1089
1090
atexit.register(cleanup)
1091
1092
if not debug:
1093
signal.signal(signal.SIGINT, signal.SIG_IGN)
2630
del pidfilename
2631
1094
2632
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1095
2633
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1096
2634
1097
2635
if use_dbus:
1098
class MandosServer(dbus.service.Object):
2636
@alternate_dbus_interfaces({"se.recompile.Mandos":
2637
"se.bsnet.fukt.Mandos"})
2638
class MandosDBusService(DBusObjectWithProperties):
1099
2639
"""A D-Bus proxy object"""
1100
2640
def __init__(self):
1101
2641
dbus.service.Object.__init__(self, bus, "/")
1102
_interface = u"se.bsnet.fukt.Mandos"
1103
1104
@dbus.service.signal(_interface, signature="oa{sv}")
1105
def ClientAdded(self, objpath, properties):
2642
_interface = "se.recompile.Mandos"
2643
2644
@dbus_interface_annotations(_interface)
2645
def _foo(self):
2646
return { "org.freedesktop.DBus.Property"
2647
".EmitsChangedSignal":
2648
"false"}
2649
2650
@dbus.service.signal(_interface, signature="o")
2651
def ClientAdded(self, objpath):
2652
"D-Bus signal"
2653
pass
2654
2655
@dbus.service.signal(_interface, signature="ss")
2656
def ClientNotFound(self, fingerprint, address):
1106
2657
"D-Bus signal"
1107
2658
pass
1108
2659
1113
2664
1114
2665
@dbus.service.method(_interface, out_signature="ao")
1115
2666
def GetAllClients(self):
1116
return dbus.Array(c.dbus_object_path for c in clients)
2667
"D-Bus method"
2668
return dbus.Array(c.dbus_object_path
2669
for c in
2670
tcp_server.clients.itervalues())
1117
2671
1118
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2672
@dbus.service.method(_interface,
2673
out_signature="a{oa{sv}}")
1119
2674
def GetAllClientsWithProperties(self):
2675
"D-Bus method"
1120
2676
return dbus.Dictionary(
1121
((c.dbus_object_path, c.GetAllProperties())
1122
for c in clients),
2677
((c.dbus_object_path, c.GetAll(""))
2678
for c in tcp_server.clients.itervalues()),
1123
2679
signature="oa{sv}")
1124
2680
1125
2681
@dbus.service.method(_interface, in_signature="o")
1126
2682
def RemoveClient(self, object_path):
1127
for c in clients:
2683
"D-Bus method"
2684
for c in tcp_server.clients.itervalues():
1128
2685
if c.dbus_object_path == object_path:
1129
clients.remove(c)
2686
del tcp_server.clients[c.name]
2687
c.remove_from_connection()
1130
2688
# Don't signal anything except ClientRemoved
1131
c.use_dbus = False
1132
c.disable()
2689
c.disable(quiet=True)
1133
2690
# Emit D-Bus signal
1134
2691
self.ClientRemoved(object_path, c.name)
1135
2692
return
1136
raise KeyError
2693
raise KeyError(object_path)
1137
2694
1138
2695
del _interface
1139
2696
1140
mandos_server = MandosServer()
1141
1142
for client in clients:
2697
mandos_dbus_service = MandosDBusService()
2698
2699
def cleanup():
2700
"Cleanup function; run on exit"
2701
service.cleanup()
2702
2703
multiprocessing.active_children()
2704
if not (tcp_server.clients or client_settings):
2705
return
2706
2707
# Store client before exiting. Secrets are encrypted with key
2708
# based on what config file has. If config file is
2709
# removed/edited, old secret will thus be unrecovable.
2710
clients = {}
2711
with PGPEngine() as pgp:
2712
for client in tcp_server.clients.itervalues():
2713
key = client_settings[client.name]["secret"]
2714
client.encrypted_secret = pgp.encrypt(client.secret,
2715
key)
2716
client_dict = {}
2717
2718
# A list of attributes that can not be pickled
2719
# + secret.
2720
exclude = set(("bus", "changedstate", "secret",
2721
"checker"))
2722
for name, typ in (inspect.getmembers
2723
(dbus.service.Object)):
2724
exclude.add(name)
2725
2726
client_dict["encrypted_secret"] = (client
2727
.encrypted_secret)
2728
for attr in client.client_structure:
2729
if attr not in exclude:
2730
client_dict[attr] = getattr(client, attr)
2731
2732
clients[client.name] = client_dict
2733
del client_settings[client.name]["secret"]
2734
2735
try:
2736
with (tempfile.NamedTemporaryFile
2737
(mode='wb', suffix=".pickle", prefix='clients-',
2738
dir=os.path.dirname(stored_state_path),
2739
delete=False)) as stored_state:
2740
pickle.dump((clients, client_settings), stored_state)
2741
tempname=stored_state.name
2742
os.rename(tempname, stored_state_path)
2743
except (IOError, OSError) as e:
2744
if not debug:
2745
try:
2746
os.remove(tempname)
2747
except NameError:
2748
pass
2749
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2750
logger.warning("Could not save persistent state: {0}"
2751
.format(os.strerror(e.errno)))
2752
else:
2753
logger.warning("Could not save persistent state:",
2754
exc_info=e)
2755
raise e
2756
2757
# Delete all clients, and settings from config
2758
while tcp_server.clients:
2759
name, client = tcp_server.clients.popitem()
2760
if use_dbus:
2761
client.remove_from_connection()
2762
# Don't signal anything except ClientRemoved
2763
client.disable(quiet=True)
2764
if use_dbus:
2765
# Emit D-Bus signal
2766
mandos_dbus_service.ClientRemoved(client
2767
.dbus_object_path,
2768
client.name)
2769
client_settings.clear()
2770
2771
atexit.register(cleanup)
2772
2773
for client in tcp_server.clients.itervalues():
1143
2774
if use_dbus:
1144
2775
# Emit D-Bus signal
1145
mandos_server.ClientAdded(client.dbus_object_path,
1146
client.GetAllProperties())
1147
client.enable()
2776
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2777
# Need to initiate checking of clients
2778
if client.enabled:
2779
client.init_checker()
1148
2780
1149
2781
tcp_server.enable()
1150
2782
tcp_server.server_activate()
1151
2783
1152
2784
# Find out what port we got
1153
2785
service.port = tcp_server.socket.getsockname()[1]
1154
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1155
u" scope_id %d" % tcp_server.socket.getsockname())
2786
if use_ipv6:
2787
logger.info("Now listening on address %r, port %d,"
2788
" flowinfo %d, scope_id %d",
2789
*tcp_server.socket.getsockname())
2790
else: # IPv4
2791
logger.info("Now listening on address %r, port %d",
2792
*tcp_server.socket.getsockname())
1156
2793
1157
2794
#service.interface = tcp_server.socket.getsockname()[3]
1158
2795
1159
2796
try:
1160
2797
# From the Avahi example code
1161
server.connect_to_signal("StateChanged", server_state_changed)
1162
2798
try:
1163
server_state_changed(server.GetState())
1164
except dbus.exceptions.DBusException, error:
1165
logger.critical(u"DBusException: %s", error)
2799
service.activate()
2800
except dbus.exceptions.DBusException as error:
2801
logger.critical("D-Bus Exception", exc_info=error)
2802
cleanup()
1166
2803
sys.exit(1)
1167
2804
# End of Avahi example code
1168
2805
1171
2808
(tcp_server.handle_request
1172
2809
(*args[2:], **kwargs) or True))
1173
2810
1174
logger.debug(u"Starting main loop")
2811
logger.debug("Starting main loop")
1175
2812
main_loop.run()
1176
except AvahiError, error:
1177
logger.critical(u"AvahiError: %s", error)
2813
except AvahiError as error:
2814
logger.critical("Avahi Error", exc_info=error)
2815
cleanup()
1178
2816
sys.exit(1)
1179
2817
except KeyboardInterrupt:
1180
2818
if debug:
1181
print
2819
print("", file=sys.stderr)
2820
logger.debug("Server received KeyboardInterrupt")
2821
logger.debug("Server exiting")
2822
# Must run before the D-Bus bus name gets deregistered
2823
cleanup()
1182
2824
1183
2825
if __name__ == '__main__':
1184
2826
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0