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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
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
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 [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
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
84
214
85
215
class AvahiError(Exception):
86
216
def __init__(self, value, *args, **kwargs):
98
228
99
229
class AvahiService(object):
100
230
"""An Avahi (Zeroconf) service.
231
101
232
Attributes:
102
233
interface: integer; avahi.IF_UNSPEC or an interface index.
103
234
Used to optionally bind to the specified interface.
111
242
max_renames: integer; maximum number of renames
112
243
rename_count: integer; counter so we only rename after collisions
113
244
a sensible number of times
245
group: D-Bus Entry Group
246
server: D-Bus Server
247
bus: dbus.SystemBus()
114
248
"""
249
115
250
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
251
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768):
252
domain = "", host = "", max_renames = 32768,
253
protocol = avahi.PROTO_UNSPEC, bus = None):
118
254
self.interface = interface
119
255
self.name = name
120
256
self.type = servicetype
124
260
self.host = host
125
261
self.rename_count = 0
126
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
127
269
def rename(self):
128
270
"""Derived from the Avahi example code"""
129
271
if self.rename_count >= self.max_renames:
130
logger.critical(u"No suitable Zeroconf service name found"
131
u" after %i retries, exiting.",
272
logger.critical("No suitable Zeroconf service name found"
273
" after %i retries, exiting.",
132
274
self.rename_count)
133
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
135
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
137
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
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)
140
280
self.remove()
141
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)
142
287
self.rename_count += 1
288
143
289
def remove(self):
144
290
"""Derived from the Avahi example code"""
145
if group is not None:
146
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
147
297
def add(self):
148
298
"""Derived from the Avahi example code"""
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
152
(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
entry_group_state_changed)
157
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
171
# End of Avahi example code
172
173
174
def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
179
class Client(dbus.service.Object):
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):
180
403
"""A representation of a client host served by this server.
404
181
405
Attributes:
182
name: string; from the config file, used in log messages and
183
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()
184
424
fingerprint: string (40 or 32 hexadecimal digits); used to
185
425
uniquely identify the client
186
secret: bytestring; sent verbatim (over TLS) to client
187
426
host: string; available for use by the checker command
188
created: datetime.datetime(); (UTC) object creation
189
last_enabled: datetime.datetime(); (UTC)
190
enabled: bool()
427
interval: datetime.timedelta(); How often to start a new checker
428
last_approval_request: datetime.datetime(); (UTC) or None
191
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
192
437
timeout: datetime.timedelta(); How long from last_checked_ok
193
until this client is invalid
194
interval: datetime.timedelta(); How often to start a new checker
195
disable_hook: If set, called by disable() as disable_hook(self)
196
checker: subprocess.Popen(); a running checker process used
197
to see if the client lives.
198
'None' if no process is running.
199
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
201
checker_callback_tag: - '' -
202
checker_command: string; External command which is run to check if
203
client lives. %() expansions are done at
204
runtime with vars(self) as dict, so that for
205
instance %(name)s can be used in the command.
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
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
208
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
209
461
def timeout_milliseconds(self):
210
462
"Return the 'timeout' attribute in milliseconds"
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
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)
214
468
215
469
def interval_milliseconds(self):
216
470
"Return the 'interval' attribute in milliseconds"
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
220
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
223
"""Note: the 'checker' key in 'config' sets the
224
'checker_command' attribute and *not* the 'checker'
225
attribute."""
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):
226
524
self.name = name
227
if config is None:
228
config = {}
229
logger.debug(u"Creating client %r", self.name)
230
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)
231
540
# Uppercase and remove spaces from fingerprint for later
232
541
# comparison purposes with return value from the fingerprint()
233
542
# function
234
self.fingerprint = (config["fingerprint"].upper()
235
.replace(u" ", u""))
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
243
self.secret = secfile.read()
244
else:
245
raise TypeError(u"No secret or secfile for client %s"
246
% self.name)
247
self.host = config.get("host", "")
248
self.created = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
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
255
548
self.checker = None
256
549
self.checker_initiator_tag = None
257
550
self.disable_initiator_tag = None
258
551
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
260
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
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()
270
574
271
575
def enable(self):
272
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
273
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):
274
610
# Schedule a new checker to be started an 'interval' from now,
275
611
# and every interval from then on.
612
if self.checker_initiator_tag is not None:
613
gobject.source_remove(self.checker_initiator_tag)
276
614
self.checker_initiator_tag = (gobject.timeout_add
277
615
(self.interval_milliseconds(),
278
616
self.start_checker))
279
# Also start a new checker *right now*.
280
self.start_checker()
281
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)
282
620
self.disable_initiator_tag = (gobject.timeout_add
283
621
(self.timeout_milliseconds(),
284
622
self.disable))
285
self.enabled = True
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
293
294
def disable(self):
295
"""Disable this client."""
296
if not getattr(self, "enabled", False):
297
return False
298
logger.info(u"Disabling client %s", self.name)
299
if getattr(self, "disable_initiator_tag", False):
300
gobject.source_remove(self.disable_initiator_tag)
301
self.disable_initiator_tag = None
302
if getattr(self, "checker_initiator_tag", False):
303
gobject.source_remove(self.checker_initiator_tag)
304
self.checker_initiator_tag = None
305
self.stop_checker()
306
if self.disable_hook:
307
self.disable_hook(self)
308
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
313
# Do not run this again if called by a gobject.timeout_add
314
return False
315
316
def __del__(self):
317
self.disable_hook = None
318
self.disable()
623
# Also start a new checker *right now*.
624
self.start_checker()
319
625
320
626
def checker_callback(self, pid, condition, command):
321
627
"""The checker has completed, so take appropriate actions."""
322
628
self.checker_callback_tag = None
323
629
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
328
630
if os.WIFEXITED(condition):
329
exitstatus = os.WEXITSTATUS(condition)
330
if exitstatus == 0:
331
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",
332
634
vars(self))
333
635
self.checked_ok()
334
636
else:
335
logger.info(u"Checker for %(name)s failed",
637
logger.info("Checker for %(name)s failed",
336
638
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
342
639
else:
343
logger.warning(u"Checker for %(name)s crashed?",
640
self.last_checker_status = -1
641
logger.warning("Checker for %(name)s crashed?",
344
642
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
350
643
351
644
def checked_ok(self):
352
"""Bump up the timeout for this client.
353
This should only be called when the client has been seen,
354
alive and well.
355
"""
645
"""Assert that the client has been seen, alive and well."""
356
646
self.last_checked_ok = datetime.datetime.utcnow()
357
gobject.source_remove(self.disable_initiator_tag)
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
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()
367
665
368
666
def start_checker(self):
369
667
"""Start a new checker subprocess if one is not running.
668
370
669
If a checker already exists, leave it running and do
371
670
nothing."""
372
671
# The reason for not killing a running checker is that if we
373
# did that, then if a checker (for some reason) started
374
# running slowly and taking more than 'interval' time, the
375
# client would inevitably timeout, since no checker would get
376
# a chance to run to completion. If we instead leave running
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
377
676
# checkers alone, the checker would have to take more time
378
# than 'timeout' for the client to be declared invalid, which
379
# 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
380
694
if self.checker is None:
381
try:
382
# In case checker_command has exactly one % operator
383
command = self.checker_command % self.host
384
except TypeError:
385
# Escape attributes for the shell
386
escaped_attrs = dict((key, re.escape(str(val)))
387
for key, val in
388
vars(self).iteritems())
389
try:
390
command = self.checker_command % escaped_attrs
391
except TypeError, error:
392
logger.error(u'Could not format string "%s":'
393
u' %s', self.checker_command, error)
394
return True # Try again later
395
try:
396
logger.info(u"Starting checker %r for %s",
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",
397
709
command, self.name)
398
710
# We don't need to redirect stdout and stderr, since
399
711
# in normal mode, that is already done by daemon(),
402
714
self.checker = subprocess.Popen(command,
403
715
close_fds=True,
404
716
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
411
self.checker_callback_tag = (gobject.child_watch_add
412
(self.checker.pid,
413
self.checker_callback,
414
data=command))
415
# The checker may have completed before the gobject
416
# watch was added. Check for this.
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:
417
728
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
418
if pid:
419
gobject.source_remove(self.checker_callback_tag)
420
self.checker_callback(pid, status, command)
421
except OSError, error:
422
logger.error(u"Failed to start subprocess: %s",
423
error)
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)
424
739
# Re-run this periodically if run by gobject.timeout_add
425
740
return True
426
741
431
746
self.checker_callback_tag = None
432
747
if getattr(self, "checker", None) is None:
433
748
return
434
logger.debug(u"Stopping checker for %(name)s", vars(self))
749
logger.debug("Stopping checker for %(name)s", vars(self))
435
750
try:
436
os.kill(self.checker.pid, signal.SIGTERM)
437
#os.sleep(0.5)
751
self.checker.terminate()
752
#time.sleep(0.5)
438
753
#if self.checker.poll() is None:
439
# os.kill(self.checker.pid, signal.SIGKILL)
440
except OSError, error:
754
# self.checker.kill()
755
except OSError as error:
441
756
if error.errno != errno.ESRCH: # No such process
442
757
raise
443
758
self.checker = None
444
if self.use_dbus:
445
self.PropertyChanged(dbus.String(u"checker_running"),
446
dbus.Boolean(False, variant_level=1))
447
448
def still_valid(self):
449
"""Has the timeout not yet passed for this client?"""
450
if not getattr(self, "enabled", False):
451
return False
452
now = datetime.datetime.utcnow()
453
if self.last_checked_ok is None:
454
return now < (self.created + self.timeout)
455
else:
456
return now < (self.last_checked_ok + self.timeout)
457
458
## D-Bus methods & signals
459
_interface = u"se.bsnet.fukt.Mandos.Client"
460
461
# CheckedOK - method
462
CheckedOK = dbus.service.method(_interface)(checked_ok)
463
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
464
1366
465
1367
# CheckerCompleted - signal
466
1368
@dbus.service.signal(_interface, signature="nxs")
474
1376
"D-Bus signal"
475
1377
pass
476
1378
477
# GetAllProperties - method
478
@dbus.service.method(_interface, out_signature="a{sv}")
479
def GetAllProperties(self):
480
"D-Bus method"
481
return dbus.Dictionary({
482
dbus.String("name"):
483
dbus.String(self.name, variant_level=1),
484
dbus.String("fingerprint"):
485
dbus.String(self.fingerprint, variant_level=1),
486
dbus.String("host"):
487
dbus.String(self.host, variant_level=1),
488
dbus.String("created"):
489
_datetime_to_dbus(self.created, variant_level=1),
490
dbus.String("last_enabled"):
491
(_datetime_to_dbus(self.last_enabled,
492
variant_level=1)
493
if self.last_enabled is not None
494
else dbus.Boolean(False, variant_level=1)),
495
dbus.String("enabled"):
496
dbus.Boolean(self.enabled, variant_level=1),
497
dbus.String("last_checked_ok"):
498
(_datetime_to_dbus(self.last_checked_ok,
499
variant_level=1)
500
if self.last_checked_ok is not None
501
else dbus.Boolean (False, variant_level=1)),
502
dbus.String("timeout"):
503
dbus.UInt64(self.timeout_milliseconds(),
504
variant_level=1),
505
dbus.String("interval"):
506
dbus.UInt64(self.interval_milliseconds(),
507
variant_level=1),
508
dbus.String("checker"):
509
dbus.String(self.checker_command,
510
variant_level=1),
511
dbus.String("checker_running"):
512
dbus.Boolean(self.checker is not None,
513
variant_level=1),
514
dbus.String("object_path"):
515
dbus.ObjectPath(self.dbus_object_path,
516
variant_level=1)
517
}, signature="sv")
518
519
# IsStillValid - method
520
IsStillValid = (dbus.service.method(_interface, out_signature="b")
521
(still_valid))
522
IsStillValid.__name__ = "IsStillValid"
523
524
1379
# PropertyChanged - signal
525
1380
@dbus.service.signal(_interface, signature="sv")
526
1381
def PropertyChanged(self, property, value):
527
1382
"D-Bus signal"
528
1383
pass
529
1384
530
# SetChecker - method
531
@dbus.service.method(_interface, in_signature="s")
532
def SetChecker(self, checker):
533
"D-Bus setter method"
534
self.checker_command = checker
535
# Emit D-Bus signal
536
self.PropertyChanged(dbus.String(u"checker"),
537
dbus.String(self.checker_command,
538
variant_level=1))
539
540
# SetHost - method
541
@dbus.service.method(_interface, in_signature="s")
542
def SetHost(self, host):
543
"D-Bus setter method"
544
self.host = host
545
# Emit D-Bus signal
546
self.PropertyChanged(dbus.String(u"host"),
547
dbus.String(self.host, variant_level=1))
548
549
# SetInterval - method
550
@dbus.service.method(_interface, in_signature="t")
551
def SetInterval(self, milliseconds):
552
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
553
# Emit D-Bus signal
554
self.PropertyChanged(dbus.String(u"interval"),
555
(dbus.UInt64(self.interval_milliseconds(),
556
variant_level=1)))
557
558
# SetSecret - method
559
@dbus.service.method(_interface, in_signature="ay",
560
byte_arrays=True)
561
def SetSecret(self, secret):
562
"D-Bus setter method"
563
self.secret = str(secret)
564
565
# SetTimeout - method
566
@dbus.service.method(_interface, in_signature="t")
567
def SetTimeout(self, milliseconds):
568
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
569
# Emit D-Bus signal
570
self.PropertyChanged(dbus.String(u"timeout"),
571
(dbus.UInt64(self.timeout_milliseconds(),
572
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()
573
1417
574
1418
# Enable - method
575
Enable = dbus.service.method(_interface)(enable)
576
Enable.__name__ = "Enable"
1419
@dbus.service.method(_interface)
1420
def Enable(self):
1421
"D-Bus method"
1422
self.enable()
577
1423
578
1424
# StartChecker - method
579
1425
@dbus.service.method(_interface)
588
1434
self.disable()
589
1435
590
1436
# StopChecker - method
591
StopChecker = dbus.service.method(_interface)(stop_checker)
592
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)
593
1615
594
1616
del _interface
595
1617
596
1618
597
def peer_certificate(session):
598
"Return the peer's OpenPGP certificate as a bytestring"
599
# If not an OpenPGP certificate...
600
if (gnutls.library.functions
601
.gnutls_certificate_type_get(session._c_object)
602
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
603
# ...do the normal thing
604
return session.peer_certificate
605
list_size = ctypes.c_uint(1)
606
cert_list = (gnutls.library.functions
607
.gnutls_certificate_get_peers
608
(session._c_object, ctypes.byref(list_size)))
609
if not bool(cert_list) and list_size.value != 0:
610
raise gnutls.errors.GNUTLSError("error getting peer"
611
" certificate")
612
if list_size.value == 0:
613
return None
614
cert = cert_list[0]
615
return ctypes.string_at(cert.data, cert.size)
616
617
618
def fingerprint(openpgp):
619
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
620
# New GnuTLS "datum" with the OpenPGP public key
621
datum = (gnutls.library.types
622
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
623
ctypes.POINTER
624
(ctypes.c_ubyte)),
625
ctypes.c_uint(len(openpgp))))
626
# New empty GnuTLS certificate
627
crt = gnutls.library.types.gnutls_openpgp_crt_t()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
630
# Import the OpenPGP public key into the certificate
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
633
gnutls.library.constants
634
.GNUTLS_OPENPGP_FMT_RAW))
635
# Verify the self signature in the key
636
crtverify = ctypes.c_uint()
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
639
if crtverify.value != 0:
640
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
raise gnutls.errors.CertificateSecurityError("Verify failed")
642
# New buffer for the fingerprint
643
buf = ctypes.create_string_buffer(20)
644
buf_len = ctypes.c_size_t()
645
# Get the fingerprint from the certificate into the buffer
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
648
ctypes.byref(buf_len)))
649
# Deinit the certificate
650
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
651
# Convert the buffer to a Python bytestring
652
fpr = ctypes.string_at(buf, buf_len.value)
653
# Convert the bytestring to hexadecimal notation
654
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
655
return hex_fpr
656
657
658
class TCP_handler(SocketServer.BaseRequestHandler, object):
659
"""A TCP request handler class.
660
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.
661
1649
Note: This will run in its own forked process."""
662
1650
663
1651
def handle(self):
664
logger.info(u"TCP connection from: %s",
665
unicode(self.client_address))
666
session = (gnutls.connection
667
.ClientSession(self.request,
668
gnutls.connection
669
.X509Credentials()))
670
671
line = self.request.makefile().readline()
672
logger.debug(u"Protocol version: %r", line)
673
try:
674
if int(line.strip().split()[0]) > 1:
675
raise RuntimeError
676
except (ValueError, IndexError, RuntimeError), error:
677
logger.error(u"Unknown protocol version: %s", error)
678
return
679
680
# Note: gnutls.connection.X509Credentials is really a generic
681
# GnuTLS certificate credentials object so long as no X.509
682
# keys are added to it. Therefore, we can use it here despite
683
# using OpenPGP certificates.
684
685
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
686
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
687
# "+DHE-DSS"))
688
# Use a fallback default, since this MUST be set.
689
priority = self.server.settings.get("priority", "NORMAL")
690
(gnutls.library.functions
691
.gnutls_priority_set_direct(session._c_object,
692
priority, None))
693
694
try:
695
session.handshake()
696
except gnutls.errors.GNUTLSError, error:
697
logger.warning(u"Handshake failed: %s", error)
698
# Do not run session.bye() here: the session is not
699
# established. Just abandon the request.
700
return
701
logger.debug(u"Handshake succeeded")
702
try:
703
fpr = fingerprint(peer_certificate(session))
704
except (TypeError, gnutls.errors.GNUTLSError), error:
705
logger.warning(u"Bad certificate: %s", error)
706
session.bye()
707
return
708
logger.debug(u"Fingerprint: %s", fpr)
709
710
for c in self.server.clients:
711
if c.fingerprint == fpr:
712
client = c
713
break
714
else:
715
logger.warning(u"Client not found for fingerprint: %s",
716
fpr)
717
session.bye()
718
return
719
# Have to check if client.still_valid(), since it is possible
720
# that the client timed out while establishing the GnuTLS
721
# session.
722
if not client.still_valid():
723
logger.warning(u"Client %(name)s is invalid",
724
vars(client))
725
session.bye()
726
return
727
## This won't work here, since we're in a fork.
728
# client.checked_ok()
729
sent_size = 0
730
while sent_size < len(client.secret):
731
sent = session.send(client.secret[sent_size:])
732
logger.debug(u"Sent: %d, remaining: %d",
733
sent, len(client.secret)
734
- (sent_size + sent))
735
sent_size += sent
736
session.bye()
737
738
739
class IPv6_TCPServer(SocketServer.ForkingMixIn,
740
SocketServer.TCPServer, object):
741
"""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
742
1906
Attributes:
743
settings: Server settings
744
clients: Set() of Client objects
745
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
746
1910
"""
747
address_family = socket.AF_INET6
748
def __init__(self, *args, **kwargs):
749
if "settings" in kwargs:
750
self.settings = kwargs["settings"]
751
del kwargs["settings"]
752
if "clients" in kwargs:
753
self.clients = kwargs["clients"]
754
del kwargs["clients"]
755
self.enabled = False
756
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
757
1948
def server_bind(self):
758
1949
"""This overrides the normal server_bind() function
759
1950
to bind to an interface if one was specified, and also NOT to
760
1951
bind to an address or port if they were not specified."""
761
if self.settings["interface"]:
762
# 25 is from /usr/include/asm-i486/socket.h
763
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
764
try:
765
self.socket.setsockopt(socket.SOL_SOCKET,
766
SO_BINDTODEVICE,
767
self.settings["interface"])
768
except socket.error, error:
769
if error[0] == errno.EPERM:
770
logger.error(u"No permission to"
771
u" bind to interface %s",
772
self.settings["interface"])
773
else:
774
raise
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
775
1975
# Only bind(2) the socket if we really need to.
776
1976
if self.server_address[0] or self.server_address[1]:
777
1977
if not self.server_address[0]:
778
in6addr_any = "::"
779
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,
780
1983
self.server_address[1])
781
1984
elif not self.server_address[1]:
782
1985
self.server_address = (self.server_address[0],
783
1986
0)
784
# if self.settings["interface"]:
1987
# if self.interface:
785
1988
# self.server_address = (self.server_address[0],
786
1989
# 0, # port
787
1990
# 0, # flowinfo
788
1991
# if_nametoindex
789
# (self.settings
790
# ["interface"]))
791
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)
792
2020
def server_activate(self):
793
2021
if self.enabled:
794
return super(IPv6_TCPServer, self).server_activate()
2022
return socketserver.TCPServer.server_activate(self)
2023
795
2024
def enable(self):
796
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
797
2200
798
2201
799
2202
def string_to_delta(interval):
807
2210
datetime.timedelta(0, 3600)
808
2211
>>> string_to_delta('24h')
809
2212
datetime.timedelta(1)
810
>>> string_to_delta(u'1w')
2213
>>> string_to_delta('1w')
811
2214
datetime.timedelta(7)
812
2215
>>> string_to_delta('5m 30s')
813
2216
datetime.timedelta(0, 330)
814
2217
"""
2218
2219
try:
2220
return rfc3339_duration_to_delta(interval)
2221
except ValueError:
2222
pass
2223
815
2224
timevalue = datetime.timedelta(0)
816
2225
for s in interval.split():
817
2226
try:
818
2227
suffix = unicode(s[-1])
819
2228
value = int(s[:-1])
820
if suffix == u"d":
2229
if suffix == "d":
821
2230
delta = datetime.timedelta(value)
822
elif suffix == u"s":
2231
elif suffix == "s":
823
2232
delta = datetime.timedelta(0, value)
824
elif suffix == u"m":
2233
elif suffix == "m":
825
2234
delta = datetime.timedelta(0, 0, 0, 0, value)
826
elif suffix == u"h":
2235
elif suffix == "h":
827
2236
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
828
elif suffix == u"w":
2237
elif suffix == "w":
829
2238
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
830
2239
else:
831
raise ValueError
832
except (ValueError, IndexError):
833
raise ValueError
2240
raise ValueError("Unknown suffix {0!r}"
2241
.format(suffix))
2242
except (ValueError, IndexError) as e:
2243
raise ValueError(*(e.args))
834
2244
timevalue += delta
835
2245
return timevalue
836
2246
837
2247
838
def server_state_changed(state):
839
"""Derived from the Avahi example code"""
840
if state == avahi.SERVER_COLLISION:
841
logger.error(u"Zeroconf server name collision")
842
service.remove()
843
elif state == avahi.SERVER_RUNNING:
844
service.add()
845
846
847
def entry_group_state_changed(state, error):
848
"""Derived from the Avahi example code"""
849
logger.debug(u"Avahi state change: %i", state)
850
851
if state == avahi.ENTRY_GROUP_ESTABLISHED:
852
logger.debug(u"Zeroconf service established.")
853
elif state == avahi.ENTRY_GROUP_COLLISION:
854
logger.warning(u"Zeroconf service name collision.")
855
service.rename()
856
elif state == avahi.ENTRY_GROUP_FAILURE:
857
logger.critical(u"Avahi: Error in group state changed %s",
858
unicode(error))
859
raise AvahiGroupError(u"State changed: %s" % unicode(error))
860
861
def if_nametoindex(interface):
862
"""Call the C function if_nametoindex(), or equivalent"""
863
global if_nametoindex
864
try:
865
if_nametoindex = (ctypes.cdll.LoadLibrary
866
(ctypes.util.find_library("c"))
867
.if_nametoindex)
868
except (OSError, AttributeError):
869
if "struct" not in sys.modules:
870
import struct
871
if "fcntl" not in sys.modules:
872
import fcntl
873
def if_nametoindex(interface):
874
"Get an interface index the hard way, i.e. using fcntl()"
875
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
876
with closing(socket.socket()) as s:
877
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
878
struct.pack("16s16x", interface))
879
interface_index = struct.unpack("I", ifreq[16:20])[0]
880
return interface_index
881
return if_nametoindex(interface)
882
883
884
2248
def daemon(nochdir = False, noclose = False):
885
2249
"""See daemon(3). Standard BSD Unix function.
2250
886
2251
This should really exist as os.daemon, but it doesn't (yet)."""
887
2252
if os.fork():
888
2253
sys.exit()
893
2258
sys.exit()
894
2259
if not noclose:
895
2260
# Close all standard open file descriptors
896
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2261
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
897
2262
if not stat.S_ISCHR(os.fstat(null).st_mode):
898
2263
raise OSError(errno.ENODEV,
899
"/dev/null not a character device")
2264
"{0} not a character device"
2265
.format(os.devnull))
900
2266
os.dup2(null, sys.stdin.fileno())
901
2267
os.dup2(null, sys.stdout.fileno())
902
2268
os.dup2(null, sys.stderr.fileno())
905
2271
906
2272
907
2273
def main():
908
parser = optparse.OptionParser(version = "%%prog %s" % version)
909
parser.add_option("-i", "--interface", type="string",
910
metavar="IF", help="Bind to interface IF")
911
parser.add_option("-a", "--address", type="string",
912
help="Address to listen for requests on")
913
parser.add_option("-p", "--port", type="int",
914
help="Port number to receive requests on")
915
parser.add_option("--check", action="store_true",
916
help="Run self-test")
917
parser.add_option("--debug", action="store_true",
918
help="Debug mode; run in foreground and log to"
919
" terminal")
920
parser.add_option("--priority", type="string", help="GnuTLS"
921
" priority string (see GnuTLS documentation)")
922
parser.add_option("--servicename", type="string", metavar="NAME",
923
help="Zeroconf service name")
924
parser.add_option("--configdir", type="string",
925
default="/etc/mandos", metavar="DIR",
926
help="Directory to search for configuration"
927
" files")
928
parser.add_option("--no-dbus", action="store_false",
929
dest="use_dbus",
930
help="Do not provide D-Bus system bus"
931
" interface")
932
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()
933
2320
934
2321
if options.check:
935
2322
import doctest
945
2332
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
946
2333
"servicename": "Mandos",
947
2334
"use_dbus": "True",
2335
"use_ipv6": "True",
2336
"debuglevel": "",
2337
"restore": "True",
2338
"socket": "",
2339
"statedir": "/var/lib/mandos",
2340
"foreground": "False",
948
2341
}
949
2342
950
2343
# Parse config file for server-global settings
951
server_config = ConfigParser.SafeConfigParser(server_defaults)
2344
server_config = configparser.SafeConfigParser(server_defaults)
952
2345
del server_defaults
953
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2346
server_config.read(os.path.join(options.configdir,
2347
"mandos.conf"))
954
2348
# Convert the SafeConfigParser object to a dict
955
2349
server_settings = server_config.defaults()
956
2350
# Use the appropriate methods on the non-string config options
957
server_settings["debug"] = server_config.getboolean("DEFAULT",
958
"debug")
959
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
960
"use_dbus")
2351
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2352
server_settings[option] = server_config.getboolean("DEFAULT",
2353
option)
961
2354
if server_settings["port"]:
962
2355
server_settings["port"] = server_config.getint("DEFAULT",
963
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"])
964
2366
del server_config
965
2367
966
2368
# Override the settings from the config file with command line
967
2369
# options, if set.
968
2370
for option in ("interface", "address", "port", "debug",
969
2371
"priority", "servicename", "configdir",
970
"use_dbus"):
2372
"use_dbus", "use_ipv6", "debuglevel", "restore",
2373
"statedir", "socket", "foreground"):
971
2374
value = getattr(options, option)
972
2375
if value is not None:
973
2376
server_settings[option] = value
974
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
975
2385
# Now we have our good server settings in "server_settings"
976
2386
2387
##################################################################
2388
977
2389
# For convenience
978
2390
debug = server_settings["debug"]
2391
debuglevel = server_settings["debuglevel"]
979
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"]
980
2397
981
if not debug:
982
syslogger.setLevel(logging.WARNING)
983
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)
984
2406
985
2407
if server_settings["servicename"] != "Mandos":
986
2408
syslogger.setFormatter(logging.Formatter
987
('Mandos (%s): %%(levelname)s:'
988
' %%(message)s'
989
% server_settings["servicename"]))
2409
('Mandos ({0}) [%(process)d]:'
2410
' %(levelname)s: %(message)s'
2411
.format(server_settings
2412
["servicename"])))
990
2413
991
2414
# Parse config file with clients
992
client_defaults = { "timeout": "1h",
993
"interval": "5m",
994
"checker": "fping -q -- %%(host)s",
995
"host": "",
996
}
997
client_config = ConfigParser.SafeConfigParser(client_defaults)
2415
client_config = configparser.SafeConfigParser(Client
2416
.client_defaults)
998
2417
client_config.read(os.path.join(server_settings["configdir"],
999
2418
"clients.conf"))
1000
2419
1001
clients = Set()
1002
tcp_server = IPv6_TCPServer((server_settings["address"],
1003
server_settings["port"]),
1004
TCP_handler,
1005
settings=server_settings,
1006
clients=clients)
1007
pidfilename = "/var/run/mandos.pid"
1008
try:
1009
pidfile = open(pidfilename, "w")
1010
except IOError:
1011
logger.error("Could not open file %r", pidfilename)
1012
1013
try:
1014
uid = pwd.getpwnam("_mandos").pw_uid
1015
gid = pwd.getpwnam("_mandos").pw_gid
1016
except KeyError:
1017
try:
1018
uid = pwd.getpwnam("mandos").pw_uid
1019
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
1020
2448
except KeyError:
1021
try:
1022
uid = pwd.getpwnam("nobody").pw_uid
1023
gid = pwd.getpwnam("nogroup").pw_gid
1024
except KeyError:
1025
uid = 65534
1026
gid = 65534
2449
continue
2450
else:
2451
uid = 65534
2452
gid = 65534
1027
2453
try:
1028
2454
os.setgid(gid)
1029
2455
os.setuid(uid)
1030
except OSError, error:
1031
if error[0] != errno.EPERM:
2456
except OSError as error:
2457
if error.errno != errno.EPERM:
1032
2458
raise error
1033
2459
1034
# Enable all possible GnuTLS debugging
1035
2460
if debug:
2461
# Enable all possible GnuTLS debugging
2462
1036
2463
# "Use a log level over 10 to enable all debugging options."
1037
2464
# - GnuTLS manual
1038
2465
gnutls.library.functions.gnutls_global_set_log_level(11)
1043
2470
1044
2471
(gnutls.library.functions
1045
2472
.gnutls_global_set_log_function(debug_gnutls))
1046
1047
global service
1048
service = AvahiService(name = server_settings["servicename"],
1049
servicetype = "_mandos._tcp", )
1050
if server_settings["interface"]:
1051
service.interface = (if_nametoindex
1052
(server_settings["interface"]))
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()
1053
2488
1054
2489
global main_loop
1055
global bus
1056
global server
1057
2490
# From the Avahi example code
1058
DBusGMainLoop(set_as_default=True )
2491
DBusGMainLoop(set_as_default=True)
1059
2492
main_loop = gobject.MainLoop()
1060
2493
bus = dbus.SystemBus()
1061
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1062
avahi.DBUS_PATH_SERVER),
1063
avahi.DBUS_INTERFACE_SERVER)
1064
2494
# End of Avahi example code
1065
2495
if use_dbus:
1066
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1067
1068
clients.update(Set(Client(name = section,
1069
config
1070
= dict(client_config.items(section)),
1071
use_dbus = use_dbus)
1072
for section in client_config.sections()))
1073
if not clients:
1074
logger.warning(u"No clients defined")
1075
1076
if debug:
1077
# Redirect stdin so all checkers get /dev/null
1078
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1079
os.dup2(null, sys.stdin.fileno())
1080
if null > 2:
1081
os.close(null)
1082
else:
1083
# No console logging
1084
logger.removeHandler(console)
1085
# Close all input and output, do double fork, etc.
1086
daemon()
1087
1088
try:
1089
pid = os.getpid()
1090
pidfile.write(str(pid) + "\n")
1091
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)
1092
2629
del pidfile
1093
except IOError:
1094
logger.error(u"Could not write to file %r with PID %d",
1095
pidfilename, pid)
1096
except NameError:
1097
# "pidfile" was never created
1098
pass
1099
del pidfilename
1100
1101
def cleanup():
1102
"Cleanup function; run on exit"
1103
global group
1104
# From the Avahi example code
1105
if not group is None:
1106
group.Free()
1107
group = None
1108
# End of Avahi example code
1109
1110
while clients:
1111
client = clients.pop()
1112
client.disable_hook = None
1113
client.disable()
1114
1115
atexit.register(cleanup)
1116
1117
if not debug:
1118
signal.signal(signal.SIGINT, signal.SIG_IGN)
2630
del pidfilename
2631
1119
2632
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1120
2633
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1121
2634
1122
2635
if use_dbus:
1123
class MandosServer(dbus.service.Object):
2636
@alternate_dbus_interfaces({"se.recompile.Mandos":
2637
"se.bsnet.fukt.Mandos"})
2638
class MandosDBusService(DBusObjectWithProperties):
1124
2639
"""A D-Bus proxy object"""
1125
2640
def __init__(self):
1126
2641
dbus.service.Object.__init__(self, bus, "/")
1127
_interface = u"se.bsnet.fukt.Mandos"
1128
1129
@dbus.service.signal(_interface, signature="oa{sv}")
1130
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):
1131
2657
"D-Bus signal"
1132
2658
pass
1133
2659
1139
2665
@dbus.service.method(_interface, out_signature="ao")
1140
2666
def GetAllClients(self):
1141
2667
"D-Bus method"
1142
return dbus.Array(c.dbus_object_path for c in clients)
2668
return dbus.Array(c.dbus_object_path
2669
for c in
2670
tcp_server.clients.itervalues())
1143
2671
1144
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2672
@dbus.service.method(_interface,
2673
out_signature="a{oa{sv}}")
1145
2674
def GetAllClientsWithProperties(self):
1146
2675
"D-Bus method"
1147
2676
return dbus.Dictionary(
1148
((c.dbus_object_path, c.GetAllProperties())
1149
for c in clients),
2677
((c.dbus_object_path, c.GetAll(""))
2678
for c in tcp_server.clients.itervalues()),
1150
2679
signature="oa{sv}")
1151
2680
1152
2681
@dbus.service.method(_interface, in_signature="o")
1153
2682
def RemoveClient(self, object_path):
1154
2683
"D-Bus method"
1155
for c in clients:
2684
for c in tcp_server.clients.itervalues():
1156
2685
if c.dbus_object_path == object_path:
1157
clients.remove(c)
2686
del tcp_server.clients[c.name]
2687
c.remove_from_connection()
1158
2688
# Don't signal anything except ClientRemoved
1159
c.use_dbus = False
1160
c.disable()
2689
c.disable(quiet=True)
1161
2690
# Emit D-Bus signal
1162
2691
self.ClientRemoved(object_path, c.name)
1163
2692
return
1164
raise KeyError
2693
raise KeyError(object_path)
1165
2694
1166
2695
del _interface
1167
2696
1168
mandos_server = MandosServer()
1169
1170
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():
1171
2774
if use_dbus:
1172
2775
# Emit D-Bus signal
1173
mandos_server.ClientAdded(client.dbus_object_path,
1174
client.GetAllProperties())
1175
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()
1176
2780
1177
2781
tcp_server.enable()
1178
2782
tcp_server.server_activate()
1179
2783
1180
2784
# Find out what port we got
1181
2785
service.port = tcp_server.socket.getsockname()[1]
1182
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1183
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())
1184
2793
1185
2794
#service.interface = tcp_server.socket.getsockname()[3]
1186
2795
1187
2796
try:
1188
2797
# From the Avahi example code
1189
server.connect_to_signal("StateChanged", server_state_changed)
1190
2798
try:
1191
server_state_changed(server.GetState())
1192
except dbus.exceptions.DBusException, error:
1193
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()
1194
2803
sys.exit(1)
1195
2804
# End of Avahi example code
1196
2805
1199
2808
(tcp_server.handle_request
1200
2809
(*args[2:], **kwargs) or True))
1201
2810
1202
logger.debug(u"Starting main loop")
2811
logger.debug("Starting main loop")
1203
2812
main_loop.run()
1204
except AvahiError, error:
1205
logger.critical(u"AvahiError: %s", error)
2813
except AvahiError as error:
2814
logger.critical("Avahi Error", exc_info=error)
2815
cleanup()
1206
2816
sys.exit(1)
1207
2817
except KeyboardInterrupt:
1208
2818
if debug:
1209
print >> sys.stderr
2819
print("", file=sys.stderr)
1210
2820
logger.debug("Server received KeyboardInterrupt")
1211
2821
logger.debug("Server exiting")
2822
# Must run before the D-Bus bus name gets deregistered
2823
cleanup()
1212
2824
1213
2825
if __name__ == '__main__':
1214
2826
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0