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- Committer: Teddy Hogeborn
- Date: 2012-06-23 13:50:05 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 303.
- Revision ID: teddy@recompile.se-20120623135005-t0wtkmlw0ymnr2kg
* mandos (Client.start_checker): Return True (retry later) if starting
checker failed. Check for ECHILD
from waitpid().
checker failed. Check for ECHILD
from waitpid().
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files renamed:
- mandos-list => mandos-ctl
- 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
from optparse import OptionParser
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 = "1.0.3"
70
71
logger = logging.Logger('mandos')
80
import xml.dom.minidom
81
import inspect
82
import GnuPGInterface
83
84
try:
85
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
86
except AttributeError:
87
try:
88
from IN import SO_BINDTODEVICE
89
except ImportError:
90
SO_BINDTODEVICE = None
91
92
version = "1.6.0"
93
stored_state_file = "clients.pickle"
94
95
logger = logging.getLogger()
72
96
syslogger = (logging.handlers.SysLogHandler
73
97
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
98
address = str("/dev/log")))
99
100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
106
"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(str("16s16x"),
111
interface))
112
interface_index = struct.unpack(str("I"),
113
ifreq[16:20])[0]
114
return interface_index
115
116
117
def initlogger(debug, level=logging.WARNING):
118
"""init logger and add loglevel"""
119
120
syslogger.setFormatter(logging.Formatter
121
('Mandos [%(process)d]: %(levelname)s:'
122
' %(message)s'))
123
logger.addHandler(syslogger)
124
125
if debug:
126
console = logging.StreamHandler()
127
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
128
' [%(process)d]:'
129
' %(levelname)s:'
130
' %(message)s'))
131
logger.addHandler(console)
132
logger.setLevel(level)
133
134
135
class PGPError(Exception):
136
"""Exception if encryption/decryption fails"""
137
pass
138
139
140
class PGPEngine(object):
141
"""A simple class for OpenPGP symmetric encryption & decryption"""
142
def __init__(self):
143
self.gnupg = GnuPGInterface.GnuPG()
144
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
self.gnupg = GnuPGInterface.GnuPG()
146
self.gnupg.options.meta_interactive = False
147
self.gnupg.options.homedir = self.tempdir
148
self.gnupg.options.extra_args.extend(['--force-mdc',
149
'--quiet',
150
'--no-use-agent'])
151
152
def __enter__(self):
153
return self
154
155
def __exit__(self, exc_type, exc_value, traceback):
156
self._cleanup()
157
return False
158
159
def __del__(self):
160
self._cleanup()
161
162
def _cleanup(self):
163
if self.tempdir is not None:
164
# Delete contents of tempdir
165
for root, dirs, files in os.walk(self.tempdir,
166
topdown = False):
167
for filename in files:
168
os.remove(os.path.join(root, filename))
169
for dirname in dirs:
170
os.rmdir(os.path.join(root, dirname))
171
# Remove tempdir
172
os.rmdir(self.tempdir)
173
self.tempdir = None
174
175
def password_encode(self, password):
176
# Passphrase can not be empty and can not contain newlines or
177
# NUL bytes. So we prefix it and hex encode it.
178
return b"mandos" + binascii.hexlify(password)
179
180
def encrypt(self, data, password):
181
self.gnupg.passphrase = self.password_encode(password)
182
with open(os.devnull, "w") as devnull:
183
try:
184
proc = self.gnupg.run(['--symmetric'],
185
create_fhs=['stdin', 'stdout'],
186
attach_fhs={'stderr': devnull})
187
with contextlib.closing(proc.handles['stdin']) as f:
188
f.write(data)
189
with contextlib.closing(proc.handles['stdout']) as f:
190
ciphertext = f.read()
191
proc.wait()
192
except IOError as e:
193
raise PGPError(e)
194
self.gnupg.passphrase = None
195
return ciphertext
196
197
def decrypt(self, data, password):
198
self.gnupg.passphrase = self.password_encode(password)
199
with open(os.devnull, "w") as devnull:
200
try:
201
proc = self.gnupg.run(['--decrypt'],
202
create_fhs=['stdin', 'stdout'],
203
attach_fhs={'stderr': devnull})
204
with contextlib.closing(proc.handles['stdin']) as f:
205
f.write(data)
206
with contextlib.closing(proc.handles['stdout']) as f:
207
decrypted_plaintext = f.read()
208
proc.wait()
209
except IOError as e:
210
raise PGPError(e)
211
self.gnupg.passphrase = None
212
return decrypted_plaintext
213
83
214
84
215
class AvahiError(Exception):
85
216
def __init__(self, value, *args, **kwargs):
97
228
98
229
class AvahiService(object):
99
230
"""An Avahi (Zeroconf) service.
231
100
232
Attributes:
101
233
interface: integer; avahi.IF_UNSPEC or an interface index.
102
234
Used to optionally bind to the specified interface.
110
242
max_renames: integer; maximum number of renames
111
243
rename_count: integer; counter so we only rename after collisions
112
244
a sensible number of times
245
group: D-Bus Entry Group
246
server: D-Bus Server
247
bus: dbus.SystemBus()
113
248
"""
249
114
250
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
251
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
252
domain = "", host = "", max_renames = 32768,
253
protocol = avahi.PROTO_UNSPEC, bus = None):
117
254
self.interface = interface
118
255
self.name = name
119
256
self.type = servicetype
123
260
self.host = host
124
261
self.rename_count = 0
125
262
self.max_renames = max_renames
263
self.protocol = protocol
264
self.group = None # our entry group
265
self.server = None
266
self.bus = bus
267
self.entry_group_state_changed_match = None
268
126
269
def rename(self):
127
270
"""Derived from the Avahi example code"""
128
271
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
272
logger.critical("No suitable Zeroconf service name found"
273
" after %i retries, exiting.",
131
274
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
275
raise AvahiServiceError("Too many renames")
276
self.name = unicode(self.server
277
.GetAlternativeServiceName(self.name))
278
logger.info("Changing Zeroconf service name to %r ...",
279
self.name)
139
280
self.remove()
140
self.add()
281
try:
282
self.add()
283
except dbus.exceptions.DBusException as error:
284
logger.critical("D-Bus Exception", exc_info=error)
285
self.cleanup()
286
os._exit(1)
141
287
self.rename_count += 1
288
142
289
def remove(self):
143
290
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
291
if self.entry_group_state_changed_match is not None:
292
self.entry_group_state_changed_match.remove()
293
self.entry_group_state_changed_match = None
294
if self.group is not None:
295
self.group.Reset()
296
146
297
def add(self):
147
298
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
299
self.remove()
300
if self.group is None:
301
self.group = dbus.Interface(
302
self.bus.get_object(avahi.DBUS_NAME,
303
self.server.EntryGroupNew()),
304
avahi.DBUS_INTERFACE_ENTRY_GROUP)
305
self.entry_group_state_changed_match = (
306
self.group.connect_to_signal(
307
'StateChanged', self.entry_group_state_changed))
308
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
309
self.name, self.type)
310
self.group.AddService(
311
self.interface,
312
self.protocol,
313
dbus.UInt32(0), # flags
314
self.name, self.type,
315
self.domain, self.host,
316
dbus.UInt16(self.port),
317
avahi.string_array_to_txt_array(self.TXT))
318
self.group.Commit()
319
320
def entry_group_state_changed(self, state, error):
321
"""Derived from the Avahi example code"""
322
logger.debug("Avahi entry group state change: %i", state)
323
324
if state == avahi.ENTRY_GROUP_ESTABLISHED:
325
logger.debug("Zeroconf service established.")
326
elif state == avahi.ENTRY_GROUP_COLLISION:
327
logger.info("Zeroconf service name collision.")
328
self.rename()
329
elif state == avahi.ENTRY_GROUP_FAILURE:
330
logger.critical("Avahi: Error in group state changed %s",
331
unicode(error))
332
raise AvahiGroupError("State changed: {0!s}"
333
.format(error))
334
335
def cleanup(self):
336
"""Derived from the Avahi example code"""
337
if self.group is not None:
338
try:
339
self.group.Free()
340
except (dbus.exceptions.UnknownMethodException,
341
dbus.exceptions.DBusException):
342
pass
343
self.group = None
344
self.remove()
345
346
def server_state_changed(self, state, error=None):
347
"""Derived from the Avahi example code"""
348
logger.debug("Avahi server state change: %i", state)
349
bad_states = { avahi.SERVER_INVALID:
350
"Zeroconf server invalid",
351
avahi.SERVER_REGISTERING: None,
352
avahi.SERVER_COLLISION:
353
"Zeroconf server name collision",
354
avahi.SERVER_FAILURE:
355
"Zeroconf server failure" }
356
if state in bad_states:
357
if bad_states[state] is not None:
358
if error is None:
359
logger.error(bad_states[state])
360
else:
361
logger.error(bad_states[state] + ": %r", error)
362
self.cleanup()
363
elif state == avahi.SERVER_RUNNING:
364
self.add()
365
else:
366
if error is None:
367
logger.debug("Unknown state: %r", state)
368
else:
369
logger.debug("Unknown state: %r: %r", state, error)
370
371
def activate(self):
372
"""Derived from the Avahi example code"""
373
if self.server is None:
374
self.server = dbus.Interface(
375
self.bus.get_object(avahi.DBUS_NAME,
376
avahi.DBUS_PATH_SERVER,
377
follow_name_owner_changes=True),
378
avahi.DBUS_INTERFACE_SERVER)
379
self.server.connect_to_signal("StateChanged",
380
self.server_state_changed)
381
self.server_state_changed(self.server.GetState())
382
383
384
class AvahiServiceToSyslog(AvahiService):
385
def rename(self):
386
"""Add the new name to the syslog messages"""
387
ret = AvahiService.rename(self)
388
syslogger.setFormatter(logging.Formatter
389
('Mandos ({0}) [%(process)d]:'
390
' %(levelname)s: %(message)s'
391
.format(self.name)))
392
return ret
393
394
395
def timedelta_to_milliseconds(td):
396
"Convert a datetime.timedelta() to milliseconds"
397
return ((td.days * 24 * 60 * 60 * 1000)
398
+ (td.seconds * 1000)
399
+ (td.microseconds // 1000))
400
401
402
class Client(object):
179
403
"""A representation of a client host served by this server.
404
180
405
Attributes:
181
name: string; from the config file, used in log messages
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()
182
424
fingerprint: string (40 or 32 hexadecimal digits); used to
183
425
uniquely identify the client
184
secret: bytestring; sent verbatim (over TLS) to client
185
426
host: string; available for use by the checker command
186
created: datetime.datetime(); (UTC) object creation
187
last_enabled: datetime.datetime(); (UTC)
188
enabled: bool()
427
interval: datetime.timedelta(); How often to start a new checker
428
last_approval_request: datetime.datetime(); (UTC) or None
189
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
190
437
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
192
interval: datetime.timedelta(); How often to start a new checker
193
disable_hook: If set, called by disable() as disable_hook(self)
194
checker: subprocess.Popen(); a running checker process used
195
to see if the client lives.
196
'None' if no process is running.
197
checker_initiator_tag: a gobject event source tag, or None
198
disable_initiator_tag: - '' -
199
checker_callback_tag: - '' -
200
checker_command: string; External command which is run to check if
201
client lives. %() expansions are done at
202
runtime with vars(self) as dict, so that for
203
instance %(name)s can be used in the command.
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
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
206
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
207
461
def timeout_milliseconds(self):
208
462
"Return the 'timeout' attribute in milliseconds"
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (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)
212
468
213
469
def interval_milliseconds(self):
214
470
"Return the 'interval' attribute in milliseconds"
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
218
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
221
"""Note: the 'checker' key in 'config' sets the
222
'checker_command' attribute and *not* the 'checker'
223
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):
224
524
self.name = name
225
if config is None:
226
config = {}
227
logger.debug(u"Creating client %r", self.name)
228
self.use_dbus = use_dbus
229
if self.use_dbus:
230
self.dbus_object_path = (dbus.ObjectPath
231
("/Mandos/clients/"
232
+ self.name.replace(".", "_")))
233
dbus.service.Object.__init__(self, bus,
234
self.dbus_object_path)
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)
235
540
# Uppercase and remove spaces from fingerprint for later
236
541
# comparison purposes with return value from the fingerprint()
237
542
# function
238
self.fingerprint = (config["fingerprint"].upper()
239
.replace(u" ", u""))
240
logger.debug(u" Fingerprint: %s", self.fingerprint)
241
if "secret" in config:
242
self.secret = config["secret"].decode(u"base64")
243
elif "secfile" in config:
244
with closing(open(os.path.expanduser
245
(os.path.expandvars
246
(config["secfile"])))) as secfile:
247
self.secret = secfile.read()
248
else:
249
raise TypeError(u"No secret or secfile for client %s"
250
% self.name)
251
self.host = config.get("host", "")
252
self.created = datetime.datetime.utcnow()
253
self.enabled = False
254
self.last_enabled = None
255
self.last_checked_ok = None
256
self.timeout = string_to_delta(config["timeout"])
257
self.interval = string_to_delta(config["interval"])
258
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
259
548
self.checker = None
260
549
self.checker_initiator_tag = None
261
550
self.disable_initiator_tag = None
262
551
self.checker_callback_tag = None
263
self.checker_command = config["checker"]
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()
264
574
265
575
def enable(self):
266
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
267
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):
268
610
# Schedule a new checker to be started an 'interval' from now,
269
611
# and every interval from then on.
612
if self.checker_initiator_tag is not None:
613
gobject.source_remove(self.checker_initiator_tag)
270
614
self.checker_initiator_tag = (gobject.timeout_add
271
615
(self.interval_milliseconds(),
272
616
self.start_checker))
273
# Also start a new checker *right now*.
274
self.start_checker()
275
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)
276
620
self.disable_initiator_tag = (gobject.timeout_add
277
621
(self.timeout_milliseconds(),
278
622
self.disable))
279
self.enabled = True
280
if self.use_dbus:
281
# Emit D-Bus signals
282
self.PropertyChanged(dbus.String(u"enabled"),
283
dbus.Boolean(True, variant_level=1))
284
self.PropertyChanged(dbus.String(u"last_enabled"),
285
(_datetime_to_dbus(self.last_enabled,
286
variant_level=1)))
287
288
def disable(self):
289
"""Disable this client."""
290
if not getattr(self, "enabled", False):
291
return False
292
logger.info(u"Disabling client %s", self.name)
293
if getattr(self, "disable_initiator_tag", False):
294
gobject.source_remove(self.disable_initiator_tag)
295
self.disable_initiator_tag = None
296
if getattr(self, "checker_initiator_tag", False):
297
gobject.source_remove(self.checker_initiator_tag)
298
self.checker_initiator_tag = None
299
self.stop_checker()
300
if self.disable_hook:
301
self.disable_hook(self)
302
self.enabled = False
303
if self.use_dbus:
304
# Emit D-Bus signal
305
self.PropertyChanged(dbus.String(u"enabled"),
306
dbus.Boolean(False, variant_level=1))
307
# Do not run this again if called by a gobject.timeout_add
308
return False
309
310
def __del__(self):
311
self.disable_hook = None
312
self.disable()
623
# Also start a new checker *right now*.
624
self.start_checker()
313
625
314
626
def checker_callback(self, pid, condition, command):
315
627
"""The checker has completed, so take appropriate actions."""
316
628
self.checker_callback_tag = None
317
629
self.checker = None
318
if self.use_dbus:
319
# Emit D-Bus signal
320
self.PropertyChanged(dbus.String(u"checker_running"),
321
dbus.Boolean(False, variant_level=1))
322
if (os.WIFEXITED(condition)
323
and (os.WEXITSTATUS(condition) == 0)):
324
logger.info(u"Checker for %(name)s succeeded",
325
vars(self))
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.CheckerCompleted(dbus.Boolean(True),
329
dbus.UInt16(condition),
330
dbus.String(command))
331
self.bump_timeout()
332
elif not os.WIFEXITED(condition):
333
logger.warning(u"Checker for %(name)s crashed?",
630
if os.WIFEXITED(condition):
631
self.last_checker_status = os.WEXITSTATUS(condition)
632
if self.last_checker_status == 0:
633
logger.info("Checker for %(name)s succeeded",
634
vars(self))
635
self.checked_ok()
636
else:
637
logger.info("Checker for %(name)s failed",
638
vars(self))
639
else:
640
self.last_checker_status = -1
641
logger.warning("Checker for %(name)s crashed?",
334
642
vars(self))
335
if self.use_dbus:
336
# Emit D-Bus signal
337
self.CheckerCompleted(dbus.Boolean(False),
338
dbus.UInt16(condition),
339
dbus.String(command))
340
else:
341
logger.info(u"Checker for %(name)s failed",
342
vars(self))
343
if self.use_dbus:
344
# Emit D-Bus signal
345
self.CheckerCompleted(dbus.Boolean(False),
346
dbus.UInt16(condition),
347
dbus.String(command))
348
643
349
def bump_timeout(self):
350
"""Bump up the timeout for this client.
351
This should only be called when the client has been seen,
352
alive and well.
353
"""
644
def checked_ok(self):
645
"""Assert that the client has been seen, alive and well."""
354
646
self.last_checked_ok = datetime.datetime.utcnow()
355
gobject.source_remove(self.disable_initiator_tag)
356
self.disable_initiator_tag = (gobject.timeout_add
357
(self.timeout_milliseconds(),
358
self.disable))
359
if self.use_dbus:
360
# Emit D-Bus signal
361
self.PropertyChanged(
362
dbus.String(u"last_checked_ok"),
363
(_datetime_to_dbus(self.last_checked_ok,
364
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()
365
665
366
666
def start_checker(self):
367
667
"""Start a new checker subprocess if one is not running.
668
368
669
If a checker already exists, leave it running and do
369
670
nothing."""
370
671
# The reason for not killing a running checker is that if we
371
# did that, then if a checker (for some reason) started
372
# running slowly and taking more than 'interval' time, the
373
# client would inevitably timeout, since no checker would get
374
# 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
375
676
# checkers alone, the checker would have to take more time
376
# than 'timeout' for the client to be declared invalid, which
377
# 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
378
694
if self.checker is None:
379
try:
380
# In case checker_command has exactly one % operator
381
command = self.checker_command % self.host
382
except TypeError:
383
# Escape attributes for the shell
384
escaped_attrs = dict((key, re.escape(str(val)))
385
for key, val in
386
vars(self).iteritems())
387
try:
388
command = self.checker_command % escaped_attrs
389
except TypeError, error:
390
logger.error(u'Could not format string "%s":'
391
u' %s', self.checker_command, error)
392
return True # Try again later
393
try:
394
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",
395
709
command, self.name)
396
710
# We don't need to redirect stdout and stderr, since
397
711
# in normal mode, that is already done by daemon(),
400
714
self.checker = subprocess.Popen(command,
401
715
close_fds=True,
402
716
shell=True, cwd="/")
403
if self.use_dbus:
404
# Emit D-Bus signal
405
self.CheckerStarted(command)
406
self.PropertyChanged(
407
dbus.String("checker_running"),
408
dbus.Boolean(True, variant_level=1))
409
self.checker_callback_tag = (gobject.child_watch_add
410
(self.checker.pid,
411
self.checker_callback,
412
data=command))
413
except OSError, error:
414
logger.error(u"Failed to start subprocess: %s",
415
error)
717
except OSError as error:
718
logger.error("Failed to start subprocess",
719
exc_info=error)
720
return True
721
self.checker_callback_tag = (gobject.child_watch_add
722
(self.checker.pid,
723
self.checker_callback,
724
data=command))
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
727
try:
728
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
729
except OSError as error:
730
if error.errno == errno.ECHILD:
731
logger.error("Child process vanished", exc_info=error)
732
return True
733
raise
734
if pid:
735
gobject.source_remove(self.checker_callback_tag)
736
self.checker_callback(pid, status, command)
416
737
# Re-run this periodically if run by gobject.timeout_add
417
738
return True
418
739
423
744
self.checker_callback_tag = None
424
745
if getattr(self, "checker", None) is None:
425
746
return
426
logger.debug(u"Stopping checker for %(name)s", vars(self))
747
logger.debug("Stopping checker for %(name)s", vars(self))
427
748
try:
428
os.kill(self.checker.pid, signal.SIGTERM)
429
#os.sleep(0.5)
749
self.checker.terminate()
750
#time.sleep(0.5)
430
751
#if self.checker.poll() is None:
431
# os.kill(self.checker.pid, signal.SIGKILL)
432
except OSError, error:
752
# self.checker.kill()
753
except OSError as error:
433
754
if error.errno != errno.ESRCH: # No such process
434
755
raise
435
756
self.checker = None
436
if self.use_dbus:
437
self.PropertyChanged(dbus.String(u"checker_running"),
438
dbus.Boolean(False, variant_level=1))
439
440
def still_valid(self):
441
"""Has the timeout not yet passed for this client?"""
442
if not getattr(self, "enabled", False):
443
return False
444
now = datetime.datetime.utcnow()
445
if self.last_checked_ok is None:
446
return now < (self.created + self.timeout)
447
else:
448
return now < (self.last_checked_ok + self.timeout)
449
450
## D-Bus methods & signals
451
_interface = u"org.mandos_system.Mandos.Client"
452
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
757
758
759
def dbus_service_property(dbus_interface, signature="v",
760
access="readwrite", byte_arrays=False):
761
"""Decorators for marking methods of a DBusObjectWithProperties to
762
become properties on the D-Bus.
763
764
The decorated method will be called with no arguments by "Get"
765
and with one argument by "Set".
766
767
The parameters, where they are supported, are the same as
768
dbus.service.method, except there is only "signature", since the
769
type from Get() and the type sent to Set() is the same.
770
"""
771
# Encoding deeply encoded byte arrays is not supported yet by the
772
# "Set" method, so we fail early here:
773
if byte_arrays and signature != "ay":
774
raise ValueError("Byte arrays not supported for non-'ay'"
775
" signature {0!r}".format(signature))
776
def decorator(func):
777
func._dbus_is_property = True
778
func._dbus_interface = dbus_interface
779
func._dbus_signature = signature
780
func._dbus_access = access
781
func._dbus_name = func.__name__
782
if func._dbus_name.endswith("_dbus_property"):
783
func._dbus_name = func._dbus_name[:-14]
784
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
785
return func
786
return decorator
787
788
789
def dbus_interface_annotations(dbus_interface):
790
"""Decorator for marking functions returning interface annotations
791
792
Usage:
793
794
@dbus_interface_annotations("org.example.Interface")
795
def _foo(self): # Function name does not matter
796
return {"org.freedesktop.DBus.Deprecated": "true",
797
"org.freedesktop.DBus.Property.EmitsChangedSignal":
798
"false"}
799
"""
800
def decorator(func):
801
func._dbus_is_interface = True
802
func._dbus_interface = dbus_interface
803
func._dbus_name = dbus_interface
804
return func
805
return decorator
806
807
808
def dbus_annotations(annotations):
809
"""Decorator to annotate D-Bus methods, signals or properties
810
Usage:
811
812
@dbus_service_property("org.example.Interface", signature="b",
813
access="r")
814
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
815
"org.freedesktop.DBus.Property."
816
"EmitsChangedSignal": "false"})
817
def Property_dbus_property(self):
818
return dbus.Boolean(False)
819
"""
820
def decorator(func):
821
func._dbus_annotations = annotations
822
return func
823
return decorator
824
825
826
class DBusPropertyException(dbus.exceptions.DBusException):
827
"""A base class for D-Bus property-related exceptions
828
"""
829
def __unicode__(self):
830
return unicode(str(self))
831
832
833
class DBusPropertyAccessException(DBusPropertyException):
834
"""A property's access permissions disallows an operation.
835
"""
836
pass
837
838
839
class DBusPropertyNotFound(DBusPropertyException):
840
"""An attempt was made to access a non-existing property.
841
"""
842
pass
843
844
845
class DBusObjectWithProperties(dbus.service.Object):
846
"""A D-Bus object with properties.
847
848
Classes inheriting from this can use the dbus_service_property
849
decorator to expose methods as D-Bus properties. It exposes the
850
standard Get(), Set(), and GetAll() methods on the D-Bus.
851
"""
852
853
@staticmethod
854
def _is_dbus_thing(thing):
855
"""Returns a function testing if an attribute is a D-Bus thing
856
857
If called like _is_dbus_thing("method") it returns a function
858
suitable for use as predicate to inspect.getmembers().
859
"""
860
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
861
False)
862
863
def _get_all_dbus_things(self, thing):
864
"""Returns a generator of (name, attribute) pairs
865
"""
866
return ((getattr(athing.__get__(self), "_dbus_name",
867
name),
868
athing.__get__(self))
869
for cls in self.__class__.__mro__
870
for name, athing in
871
inspect.getmembers(cls,
872
self._is_dbus_thing(thing)))
873
874
def _get_dbus_property(self, interface_name, property_name):
875
"""Returns a bound method if one exists which is a D-Bus
876
property with the specified name and interface.
877
"""
878
for cls in self.__class__.__mro__:
879
for name, value in (inspect.getmembers
880
(cls,
881
self._is_dbus_thing("property"))):
882
if (value._dbus_name == property_name
883
and value._dbus_interface == interface_name):
884
return value.__get__(self)
885
886
# No such property
887
raise DBusPropertyNotFound(self.dbus_object_path + ":"
888
+ interface_name + "."
889
+ property_name)
890
891
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
892
out_signature="v")
893
def Get(self, interface_name, property_name):
894
"""Standard D-Bus property Get() method, see D-Bus standard.
895
"""
896
prop = self._get_dbus_property(interface_name, property_name)
897
if prop._dbus_access == "write":
898
raise DBusPropertyAccessException(property_name)
899
value = prop()
900
if not hasattr(value, "variant_level"):
901
return value
902
return type(value)(value, variant_level=value.variant_level+1)
903
904
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
905
def Set(self, interface_name, property_name, value):
906
"""Standard D-Bus property Set() method, see D-Bus standard.
907
"""
908
prop = self._get_dbus_property(interface_name, property_name)
909
if prop._dbus_access == "read":
910
raise DBusPropertyAccessException(property_name)
911
if prop._dbus_get_args_options["byte_arrays"]:
912
# The byte_arrays option is not supported yet on
913
# signatures other than "ay".
914
if prop._dbus_signature != "ay":
915
raise ValueError
916
value = dbus.ByteArray(b''.join(chr(byte)
917
for byte in value))
918
prop(value)
919
920
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
921
out_signature="a{sv}")
922
def GetAll(self, interface_name):
923
"""Standard D-Bus property GetAll() method, see D-Bus
924
standard.
925
926
Note: Will not include properties with access="write".
927
"""
928
properties = {}
929
for name, prop in self._get_all_dbus_things("property"):
930
if (interface_name
931
and interface_name != prop._dbus_interface):
932
# Interface non-empty but did not match
933
continue
934
# Ignore write-only properties
935
if prop._dbus_access == "write":
936
continue
937
value = prop()
938
if not hasattr(value, "variant_level"):
939
properties[name] = value
940
continue
941
properties[name] = type(value)(value, variant_level=
942
value.variant_level+1)
943
return dbus.Dictionary(properties, signature="sv")
944
945
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
946
out_signature="s",
947
path_keyword='object_path',
948
connection_keyword='connection')
949
def Introspect(self, object_path, connection):
950
"""Overloading of standard D-Bus method.
951
952
Inserts property tags and interface annotation tags.
953
"""
954
xmlstring = dbus.service.Object.Introspect(self, object_path,
955
connection)
956
try:
957
document = xml.dom.minidom.parseString(xmlstring)
958
def make_tag(document, name, prop):
959
e = document.createElement("property")
960
e.setAttribute("name", name)
961
e.setAttribute("type", prop._dbus_signature)
962
e.setAttribute("access", prop._dbus_access)
963
return e
964
for if_tag in document.getElementsByTagName("interface"):
965
# Add property tags
966
for tag in (make_tag(document, name, prop)
967
for name, prop
968
in self._get_all_dbus_things("property")
969
if prop._dbus_interface
970
== if_tag.getAttribute("name")):
971
if_tag.appendChild(tag)
972
# Add annotation tags
973
for typ in ("method", "signal", "property"):
974
for tag in if_tag.getElementsByTagName(typ):
975
annots = dict()
976
for name, prop in (self.
977
_get_all_dbus_things(typ)):
978
if (name == tag.getAttribute("name")
979
and prop._dbus_interface
980
== if_tag.getAttribute("name")):
981
annots.update(getattr
982
(prop,
983
"_dbus_annotations",
984
{}))
985
for name, value in annots.iteritems():
986
ann_tag = document.createElement(
987
"annotation")
988
ann_tag.setAttribute("name", name)
989
ann_tag.setAttribute("value", value)
990
tag.appendChild(ann_tag)
991
# Add interface annotation tags
992
for annotation, value in dict(
993
itertools.chain.from_iterable(
994
annotations().iteritems()
995
for name, annotations in
996
self._get_all_dbus_things("interface")
997
if name == if_tag.getAttribute("name")
998
)).iteritems():
999
ann_tag = document.createElement("annotation")
1000
ann_tag.setAttribute("name", annotation)
1001
ann_tag.setAttribute("value", value)
1002
if_tag.appendChild(ann_tag)
1003
# Add the names to the return values for the
1004
# "org.freedesktop.DBus.Properties" methods
1005
if (if_tag.getAttribute("name")
1006
== "org.freedesktop.DBus.Properties"):
1007
for cn in if_tag.getElementsByTagName("method"):
1008
if cn.getAttribute("name") == "Get":
1009
for arg in cn.getElementsByTagName("arg"):
1010
if (arg.getAttribute("direction")
1011
== "out"):
1012
arg.setAttribute("name", "value")
1013
elif cn.getAttribute("name") == "GetAll":
1014
for arg in cn.getElementsByTagName("arg"):
1015
if (arg.getAttribute("direction")
1016
== "out"):
1017
arg.setAttribute("name", "props")
1018
xmlstring = document.toxml("utf-8")
1019
document.unlink()
1020
except (AttributeError, xml.dom.DOMException,
1021
xml.parsers.expat.ExpatError) as error:
1022
logger.error("Failed to override Introspection method",
1023
exc_info=error)
1024
return xmlstring
1025
1026
1027
def datetime_to_dbus(dt, variant_level=0):
1028
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1029
if dt is None:
1030
return dbus.String("", variant_level = variant_level)
1031
return dbus.String(dt.isoformat(),
1032
variant_level=variant_level)
1033
1034
1035
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1036
"""A class decorator; applied to a subclass of
1037
dbus.service.Object, it will add alternate D-Bus attributes with
1038
interface names according to the "alt_interface_names" mapping.
1039
Usage:
1040
1041
@alternate_dbus_interfaces({"org.example.Interface":
1042
"net.example.AlternateInterface"})
1043
class SampleDBusObject(dbus.service.Object):
1044
@dbus.service.method("org.example.Interface")
1045
def SampleDBusMethod():
1046
pass
1047
1048
The above "SampleDBusMethod" on "SampleDBusObject" will be
1049
reachable via two interfaces: "org.example.Interface" and
1050
"net.example.AlternateInterface", the latter of which will have
1051
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1052
"true", unless "deprecate" is passed with a False value.
1053
1054
This works for methods and signals, and also for D-Bus properties
1055
(from DBusObjectWithProperties) and interfaces (from the
1056
dbus_interface_annotations decorator).
1057
"""
1058
def wrapper(cls):
1059
for orig_interface_name, alt_interface_name in (
1060
alt_interface_names.iteritems()):
1061
attr = {}
1062
interface_names = set()
1063
# Go though all attributes of the class
1064
for attrname, attribute in inspect.getmembers(cls):
1065
# Ignore non-D-Bus attributes, and D-Bus attributes
1066
# with the wrong interface name
1067
if (not hasattr(attribute, "_dbus_interface")
1068
or not attribute._dbus_interface
1069
.startswith(orig_interface_name)):
1070
continue
1071
# Create an alternate D-Bus interface name based on
1072
# the current name
1073
alt_interface = (attribute._dbus_interface
1074
.replace(orig_interface_name,
1075
alt_interface_name))
1076
interface_names.add(alt_interface)
1077
# Is this a D-Bus signal?
1078
if getattr(attribute, "_dbus_is_signal", False):
1079
# Extract the original non-method function by
1080
# black magic
1081
nonmethod_func = (dict(
1082
zip(attribute.func_code.co_freevars,
1083
attribute.__closure__))["func"]
1084
.cell_contents)
1085
# Create a new, but exactly alike, function
1086
# object, and decorate it to be a new D-Bus signal
1087
# with the alternate D-Bus interface name
1088
new_function = (dbus.service.signal
1089
(alt_interface,
1090
attribute._dbus_signature)
1091
(types.FunctionType(
1092
nonmethod_func.func_code,
1093
nonmethod_func.func_globals,
1094
nonmethod_func.func_name,
1095
nonmethod_func.func_defaults,
1096
nonmethod_func.func_closure)))
1097
# Copy annotations, if any
1098
try:
1099
new_function._dbus_annotations = (
1100
dict(attribute._dbus_annotations))
1101
except AttributeError:
1102
pass
1103
# Define a creator of a function to call both the
1104
# original and alternate functions, so both the
1105
# original and alternate signals gets sent when
1106
# the function is called
1107
def fixscope(func1, func2):
1108
"""This function is a scope container to pass
1109
func1 and func2 to the "call_both" function
1110
outside of its arguments"""
1111
def call_both(*args, **kwargs):
1112
"""This function will emit two D-Bus
1113
signals by calling func1 and func2"""
1114
func1(*args, **kwargs)
1115
func2(*args, **kwargs)
1116
return call_both
1117
# Create the "call_both" function and add it to
1118
# the class
1119
attr[attrname] = fixscope(attribute, new_function)
1120
# Is this a D-Bus method?
1121
elif getattr(attribute, "_dbus_is_method", False):
1122
# Create a new, but exactly alike, function
1123
# object. Decorate it to be a new D-Bus method
1124
# with the alternate D-Bus interface name. Add it
1125
# to the class.
1126
attr[attrname] = (dbus.service.method
1127
(alt_interface,
1128
attribute._dbus_in_signature,
1129
attribute._dbus_out_signature)
1130
(types.FunctionType
1131
(attribute.func_code,
1132
attribute.func_globals,
1133
attribute.func_name,
1134
attribute.func_defaults,
1135
attribute.func_closure)))
1136
# Copy annotations, if any
1137
try:
1138
attr[attrname]._dbus_annotations = (
1139
dict(attribute._dbus_annotations))
1140
except AttributeError:
1141
pass
1142
# Is this a D-Bus property?
1143
elif getattr(attribute, "_dbus_is_property", False):
1144
# Create a new, but exactly alike, function
1145
# object, and decorate it to be a new D-Bus
1146
# property with the alternate D-Bus interface
1147
# name. Add it to the class.
1148
attr[attrname] = (dbus_service_property
1149
(alt_interface,
1150
attribute._dbus_signature,
1151
attribute._dbus_access,
1152
attribute
1153
._dbus_get_args_options
1154
["byte_arrays"])
1155
(types.FunctionType
1156
(attribute.func_code,
1157
attribute.func_globals,
1158
attribute.func_name,
1159
attribute.func_defaults,
1160
attribute.func_closure)))
1161
# Copy annotations, if any
1162
try:
1163
attr[attrname]._dbus_annotations = (
1164
dict(attribute._dbus_annotations))
1165
except AttributeError:
1166
pass
1167
# Is this a D-Bus interface?
1168
elif getattr(attribute, "_dbus_is_interface", False):
1169
# Create a new, but exactly alike, function
1170
# object. Decorate it to be a new D-Bus interface
1171
# with the alternate D-Bus interface name. Add it
1172
# to the class.
1173
attr[attrname] = (dbus_interface_annotations
1174
(alt_interface)
1175
(types.FunctionType
1176
(attribute.func_code,
1177
attribute.func_globals,
1178
attribute.func_name,
1179
attribute.func_defaults,
1180
attribute.func_closure)))
1181
if deprecate:
1182
# Deprecate all alternate interfaces
1183
iname="_AlternateDBusNames_interface_annotation{0}"
1184
for interface_name in interface_names:
1185
@dbus_interface_annotations(interface_name)
1186
def func(self):
1187
return { "org.freedesktop.DBus.Deprecated":
1188
"true" }
1189
# Find an unused name
1190
for aname in (iname.format(i)
1191
for i in itertools.count()):
1192
if aname not in attr:
1193
attr[aname] = func
1194
break
1195
if interface_names:
1196
# Replace the class with a new subclass of it with
1197
# methods, signals, etc. as created above.
1198
cls = type(b"{0}Alternate".format(cls.__name__),
1199
(cls,), attr)
1200
return cls
1201
return wrapper
1202
1203
1204
@alternate_dbus_interfaces({"se.recompile.Mandos":
1205
"se.bsnet.fukt.Mandos"})
1206
class ClientDBus(Client, DBusObjectWithProperties):
1207
"""A Client class using D-Bus
1208
1209
Attributes:
1210
dbus_object_path: dbus.ObjectPath
1211
bus: dbus.SystemBus()
1212
"""
1213
1214
runtime_expansions = (Client.runtime_expansions
1215
+ ("dbus_object_path",))
1216
1217
# dbus.service.Object doesn't use super(), so we can't either.
1218
1219
def __init__(self, bus = None, *args, **kwargs):
1220
self.bus = bus
1221
Client.__init__(self, *args, **kwargs)
1222
# Only now, when this client is initialized, can it show up on
1223
# the D-Bus
1224
client_object_name = unicode(self.name).translate(
1225
{ord("."): ord("_"),
1226
ord("-"): ord("_")})
1227
self.dbus_object_path = (dbus.ObjectPath
1228
("/clients/" + client_object_name))
1229
DBusObjectWithProperties.__init__(self, self.bus,
1230
self.dbus_object_path)
1231
1232
def notifychangeproperty(transform_func,
1233
dbus_name, type_func=lambda x: x,
1234
variant_level=1):
1235
""" Modify a variable so that it's a property which announces
1236
its changes to DBus.
1237
1238
transform_fun: Function that takes a value and a variant_level
1239
and transforms it to a D-Bus type.
1240
dbus_name: D-Bus name of the variable
1241
type_func: Function that transform the value before sending it
1242
to the D-Bus. Default: no transform
1243
variant_level: D-Bus variant level. Default: 1
1244
"""
1245
attrname = "_{0}".format(dbus_name)
1246
def setter(self, value):
1247
if hasattr(self, "dbus_object_path"):
1248
if (not hasattr(self, attrname) or
1249
type_func(getattr(self, attrname, None))
1250
!= type_func(value)):
1251
dbus_value = transform_func(type_func(value),
1252
variant_level
1253
=variant_level)
1254
self.PropertyChanged(dbus.String(dbus_name),
1255
dbus_value)
1256
setattr(self, attrname, value)
1257
1258
return property(lambda self: getattr(self, attrname), setter)
1259
1260
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1261
approvals_pending = notifychangeproperty(dbus.Boolean,
1262
"ApprovalPending",
1263
type_func = bool)
1264
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1265
last_enabled = notifychangeproperty(datetime_to_dbus,
1266
"LastEnabled")
1267
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1268
type_func = lambda checker:
1269
checker is not None)
1270
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1271
"LastCheckedOK")
1272
last_checker_status = notifychangeproperty(dbus.Int16,
1273
"LastCheckerStatus")
1274
last_approval_request = notifychangeproperty(
1275
datetime_to_dbus, "LastApprovalRequest")
1276
approved_by_default = notifychangeproperty(dbus.Boolean,
1277
"ApprovedByDefault")
1278
approval_delay = notifychangeproperty(dbus.UInt64,
1279
"ApprovalDelay",
1280
type_func =
1281
timedelta_to_milliseconds)
1282
approval_duration = notifychangeproperty(
1283
dbus.UInt64, "ApprovalDuration",
1284
type_func = timedelta_to_milliseconds)
1285
host = notifychangeproperty(dbus.String, "Host")
1286
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1287
type_func =
1288
timedelta_to_milliseconds)
1289
extended_timeout = notifychangeproperty(
1290
dbus.UInt64, "ExtendedTimeout",
1291
type_func = timedelta_to_milliseconds)
1292
interval = notifychangeproperty(dbus.UInt64,
1293
"Interval",
1294
type_func =
1295
timedelta_to_milliseconds)
1296
checker_command = notifychangeproperty(dbus.String, "Checker")
1297
1298
del notifychangeproperty
1299
1300
def __del__(self, *args, **kwargs):
1301
try:
1302
self.remove_from_connection()
1303
except LookupError:
1304
pass
1305
if hasattr(DBusObjectWithProperties, "__del__"):
1306
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1307
Client.__del__(self, *args, **kwargs)
1308
1309
def checker_callback(self, pid, condition, command,
1310
*args, **kwargs):
1311
self.checker_callback_tag = None
1312
self.checker = None
1313
if os.WIFEXITED(condition):
1314
exitstatus = os.WEXITSTATUS(condition)
1315
# Emit D-Bus signal
1316
self.CheckerCompleted(dbus.Int16(exitstatus),
1317
dbus.Int64(condition),
1318
dbus.String(command))
1319
else:
1320
# Emit D-Bus signal
1321
self.CheckerCompleted(dbus.Int16(-1),
1322
dbus.Int64(condition),
1323
dbus.String(command))
1324
1325
return Client.checker_callback(self, pid, condition, command,
1326
*args, **kwargs)
1327
1328
def start_checker(self, *args, **kwargs):
1329
old_checker = self.checker
1330
if self.checker is not None:
1331
old_checker_pid = self.checker.pid
1332
else:
1333
old_checker_pid = None
1334
r = Client.start_checker(self, *args, **kwargs)
1335
# Only if new checker process was started
1336
if (self.checker is not None
1337
and old_checker_pid != self.checker.pid):
1338
# Emit D-Bus signal
1339
self.CheckerStarted(self.current_checker_command)
1340
return r
1341
1342
def _reset_approved(self):
1343
self.approved = None
1344
return False
1345
1346
def approve(self, value=True):
1347
self.approved = value
1348
gobject.timeout_add(timedelta_to_milliseconds
1349
(self.approval_duration),
1350
self._reset_approved)
1351
self.send_changedstate()
1352
1353
## D-Bus methods, signals & properties
1354
_interface = "se.recompile.Mandos.Client"
1355
1356
## Interfaces
1357
1358
@dbus_interface_annotations(_interface)
1359
def _foo(self):
1360
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1361
"false"}
1362
1363
## Signals
456
1364
457
1365
# CheckerCompleted - signal
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
1366
@dbus.service.signal(_interface, signature="nxs")
1367
def CheckerCompleted(self, exitcode, waitstatus, command):
460
1368
"D-Bus signal"
461
1369
pass
462
1370
466
1374
"D-Bus signal"
467
1375
pass
468
1376
469
# GetAllProperties - method
470
@dbus.service.method(_interface, out_signature="a{sv}")
471
def GetAllProperties(self):
472
"D-Bus method"
473
return dbus.Dictionary({
474
dbus.String("name"):
475
dbus.String(self.name, variant_level=1),
476
dbus.String("fingerprint"):
477
dbus.String(self.fingerprint, variant_level=1),
478
dbus.String("host"):
479
dbus.String(self.host, variant_level=1),
480
dbus.String("created"):
481
_datetime_to_dbus(self.created, variant_level=1),
482
dbus.String("last_enabled"):
483
(_datetime_to_dbus(self.last_enabled,
484
variant_level=1)
485
if self.last_enabled is not None
486
else dbus.Boolean(False, variant_level=1)),
487
dbus.String("enabled"):
488
dbus.Boolean(self.enabled, variant_level=1),
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
492
if self.last_checked_ok is not None
493
else dbus.Boolean (False, variant_level=1)),
494
dbus.String("timeout"):
495
dbus.UInt64(self.timeout_milliseconds(),
496
variant_level=1),
497
dbus.String("interval"):
498
dbus.UInt64(self.interval_milliseconds(),
499
variant_level=1),
500
dbus.String("checker"):
501
dbus.String(self.checker_command,
502
variant_level=1),
503
dbus.String("checker_running"):
504
dbus.Boolean(self.checker is not None,
505
variant_level=1),
506
}, signature="sv")
507
508
# IsStillValid - method
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
512
513
1377
# PropertyChanged - signal
514
1378
@dbus.service.signal(_interface, signature="sv")
515
1379
def PropertyChanged(self, property, value):
516
1380
"D-Bus signal"
517
1381
pass
518
1382
519
# SetChecker - method
520
@dbus.service.method(_interface, in_signature="s")
521
def SetChecker(self, checker):
522
"D-Bus setter method"
523
self.checker_command = checker
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"checker"),
526
dbus.String(self.checker_command,
527
variant_level=1))
528
529
# SetHost - method
530
@dbus.service.method(_interface, in_signature="s")
531
def SetHost(self, host):
532
"D-Bus setter method"
533
self.host = host
534
# Emit D-Bus signal
535
self.PropertyChanged(dbus.String(u"host"),
536
dbus.String(self.host, variant_level=1))
537
538
# SetInterval - method
539
@dbus.service.method(_interface, in_signature="t")
540
def SetInterval(self, milliseconds):
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"interval"),
544
(dbus.UInt64(self.interval_milliseconds(),
545
variant_level=1)))
546
547
# SetSecret - method
548
@dbus.service.method(_interface, in_signature="ay",
549
byte_arrays=True)
550
def SetSecret(self, secret):
551
"D-Bus setter method"
552
self.secret = str(secret)
553
554
# SetTimeout - method
555
@dbus.service.method(_interface, in_signature="t")
556
def SetTimeout(self, milliseconds):
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
558
# Emit D-Bus signal
559
self.PropertyChanged(dbus.String(u"timeout"),
560
(dbus.UInt64(self.timeout_milliseconds(),
561
variant_level=1)))
1383
# GotSecret - signal
1384
@dbus.service.signal(_interface)
1385
def GotSecret(self):
1386
"""D-Bus signal
1387
Is sent after a successful transfer of secret from the Mandos
1388
server to mandos-client
1389
"""
1390
pass
1391
1392
# Rejected - signal
1393
@dbus.service.signal(_interface, signature="s")
1394
def Rejected(self, reason):
1395
"D-Bus signal"
1396
pass
1397
1398
# NeedApproval - signal
1399
@dbus.service.signal(_interface, signature="tb")
1400
def NeedApproval(self, timeout, default):
1401
"D-Bus signal"
1402
return self.need_approval()
1403
1404
## Methods
1405
1406
# Approve - method
1407
@dbus.service.method(_interface, in_signature="b")
1408
def Approve(self, value):
1409
self.approve(value)
1410
1411
# CheckedOK - method
1412
@dbus.service.method(_interface)
1413
def CheckedOK(self):
1414
self.checked_ok()
562
1415
563
1416
# Enable - method
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
1417
@dbus.service.method(_interface)
1418
def Enable(self):
1419
"D-Bus method"
1420
self.enable()
566
1421
567
1422
# StartChecker - method
568
1423
@dbus.service.method(_interface)
577
1432
self.disable()
578
1433
579
1434
# StopChecker - method
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
1435
@dbus.service.method(_interface)
1436
def StopChecker(self):
1437
self.stop_checker()
1438
1439
## Properties
1440
1441
# ApprovalPending - property
1442
@dbus_service_property(_interface, signature="b", access="read")
1443
def ApprovalPending_dbus_property(self):
1444
return dbus.Boolean(bool(self.approvals_pending))
1445
1446
# ApprovedByDefault - property
1447
@dbus_service_property(_interface, signature="b",
1448
access="readwrite")
1449
def ApprovedByDefault_dbus_property(self, value=None):
1450
if value is None: # get
1451
return dbus.Boolean(self.approved_by_default)
1452
self.approved_by_default = bool(value)
1453
1454
# ApprovalDelay - property
1455
@dbus_service_property(_interface, signature="t",
1456
access="readwrite")
1457
def ApprovalDelay_dbus_property(self, value=None):
1458
if value is None: # get
1459
return dbus.UInt64(self.approval_delay_milliseconds())
1460
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1461
1462
# ApprovalDuration - property
1463
@dbus_service_property(_interface, signature="t",
1464
access="readwrite")
1465
def ApprovalDuration_dbus_property(self, value=None):
1466
if value is None: # get
1467
return dbus.UInt64(timedelta_to_milliseconds(
1468
self.approval_duration))
1469
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1470
1471
# Name - property
1472
@dbus_service_property(_interface, signature="s", access="read")
1473
def Name_dbus_property(self):
1474
return dbus.String(self.name)
1475
1476
# Fingerprint - property
1477
@dbus_service_property(_interface, signature="s", access="read")
1478
def Fingerprint_dbus_property(self):
1479
return dbus.String(self.fingerprint)
1480
1481
# Host - property
1482
@dbus_service_property(_interface, signature="s",
1483
access="readwrite")
1484
def Host_dbus_property(self, value=None):
1485
if value is None: # get
1486
return dbus.String(self.host)
1487
self.host = unicode(value)
1488
1489
# Created - property
1490
@dbus_service_property(_interface, signature="s", access="read")
1491
def Created_dbus_property(self):
1492
return datetime_to_dbus(self.created)
1493
1494
# LastEnabled - property
1495
@dbus_service_property(_interface, signature="s", access="read")
1496
def LastEnabled_dbus_property(self):
1497
return datetime_to_dbus(self.last_enabled)
1498
1499
# Enabled - property
1500
@dbus_service_property(_interface, signature="b",
1501
access="readwrite")
1502
def Enabled_dbus_property(self, value=None):
1503
if value is None: # get
1504
return dbus.Boolean(self.enabled)
1505
if value:
1506
self.enable()
1507
else:
1508
self.disable()
1509
1510
# LastCheckedOK - property
1511
@dbus_service_property(_interface, signature="s",
1512
access="readwrite")
1513
def LastCheckedOK_dbus_property(self, value=None):
1514
if value is not None:
1515
self.checked_ok()
1516
return
1517
return datetime_to_dbus(self.last_checked_ok)
1518
1519
# LastCheckerStatus - property
1520
@dbus_service_property(_interface, signature="n",
1521
access="read")
1522
def LastCheckerStatus_dbus_property(self):
1523
return dbus.Int16(self.last_checker_status)
1524
1525
# Expires - property
1526
@dbus_service_property(_interface, signature="s", access="read")
1527
def Expires_dbus_property(self):
1528
return datetime_to_dbus(self.expires)
1529
1530
# LastApprovalRequest - property
1531
@dbus_service_property(_interface, signature="s", access="read")
1532
def LastApprovalRequest_dbus_property(self):
1533
return datetime_to_dbus(self.last_approval_request)
1534
1535
# Timeout - property
1536
@dbus_service_property(_interface, signature="t",
1537
access="readwrite")
1538
def Timeout_dbus_property(self, value=None):
1539
if value is None: # get
1540
return dbus.UInt64(self.timeout_milliseconds())
1541
old_timeout = self.timeout
1542
self.timeout = datetime.timedelta(0, 0, 0, value)
1543
# Reschedule disabling
1544
if self.enabled:
1545
now = datetime.datetime.utcnow()
1546
self.expires += self.timeout - old_timeout
1547
if self.expires <= now:
1548
# The timeout has passed
1549
self.disable()
1550
else:
1551
if (getattr(self, "disable_initiator_tag", None)
1552
is None):
1553
return
1554
gobject.source_remove(self.disable_initiator_tag)
1555
self.disable_initiator_tag = (
1556
gobject.timeout_add(
1557
timedelta_to_milliseconds(self.expires - now),
1558
self.disable))
1559
1560
# ExtendedTimeout - property
1561
@dbus_service_property(_interface, signature="t",
1562
access="readwrite")
1563
def ExtendedTimeout_dbus_property(self, value=None):
1564
if value is None: # get
1565
return dbus.UInt64(self.extended_timeout_milliseconds())
1566
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1567
1568
# Interval - property
1569
@dbus_service_property(_interface, signature="t",
1570
access="readwrite")
1571
def Interval_dbus_property(self, value=None):
1572
if value is None: # get
1573
return dbus.UInt64(self.interval_milliseconds())
1574
self.interval = datetime.timedelta(0, 0, 0, value)
1575
if getattr(self, "checker_initiator_tag", None) is None:
1576
return
1577
if self.enabled:
1578
# Reschedule checker run
1579
gobject.source_remove(self.checker_initiator_tag)
1580
self.checker_initiator_tag = (gobject.timeout_add
1581
(value, self.start_checker))
1582
self.start_checker() # Start one now, too
1583
1584
# Checker - property
1585
@dbus_service_property(_interface, signature="s",
1586
access="readwrite")
1587
def Checker_dbus_property(self, value=None):
1588
if value is None: # get
1589
return dbus.String(self.checker_command)
1590
self.checker_command = unicode(value)
1591
1592
# CheckerRunning - property
1593
@dbus_service_property(_interface, signature="b",
1594
access="readwrite")
1595
def CheckerRunning_dbus_property(self, value=None):
1596
if value is None: # get
1597
return dbus.Boolean(self.checker is not None)
1598
if value:
1599
self.start_checker()
1600
else:
1601
self.stop_checker()
1602
1603
# ObjectPath - property
1604
@dbus_service_property(_interface, signature="o", access="read")
1605
def ObjectPath_dbus_property(self):
1606
return self.dbus_object_path # is already a dbus.ObjectPath
1607
1608
# Secret = property
1609
@dbus_service_property(_interface, signature="ay",
1610
access="write", byte_arrays=True)
1611
def Secret_dbus_property(self, value):
1612
self.secret = str(value)
582
1613
583
1614
del _interface
584
1615
585
1616
586
def peer_certificate(session):
587
"Return the peer's OpenPGP certificate as a bytestring"
588
# If not an OpenPGP certificate...
589
if (gnutls.library.functions
590
.gnutls_certificate_type_get(session._c_object)
591
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
# ...do the normal thing
593
return session.peer_certificate
594
list_size = ctypes.c_uint()
595
cert_list = (gnutls.library.functions
596
.gnutls_certificate_get_peers
597
(session._c_object, ctypes.byref(list_size)))
598
if list_size.value == 0:
599
return None
600
cert = cert_list[0]
601
return ctypes.string_at(cert.data, cert.size)
602
603
604
def fingerprint(openpgp):
605
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
# New GnuTLS "datum" with the OpenPGP public key
607
datum = (gnutls.library.types
608
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
ctypes.POINTER
610
(ctypes.c_ubyte)),
611
ctypes.c_uint(len(openpgp))))
612
# New empty GnuTLS certificate
613
crt = gnutls.library.types.gnutls_openpgp_crt_t()
614
(gnutls.library.functions
615
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
616
# Import the OpenPGP public key into the certificate
617
(gnutls.library.functions
618
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
gnutls.library.constants
620
.GNUTLS_OPENPGP_FMT_RAW))
621
# Verify the self signature in the key
622
crtverify = ctypes.c_uint()
623
(gnutls.library.functions
624
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
if crtverify.value != 0:
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
raise gnutls.errors.CertificateSecurityError("Verify failed")
628
# New buffer for the fingerprint
629
buf = ctypes.create_string_buffer(20)
630
buf_len = ctypes.c_size_t()
631
# Get the fingerprint from the certificate into the buffer
632
(gnutls.library.functions
633
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
ctypes.byref(buf_len)))
635
# Deinit the certificate
636
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
637
# Convert the buffer to a Python bytestring
638
fpr = ctypes.string_at(buf, buf_len.value)
639
# Convert the bytestring to hexadecimal notation
640
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
641
return hex_fpr
642
643
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
645
"""A TCP request handler class.
646
Instantiated by IPv6_TCPServer for each request to handle it.
1617
class ProxyClient(object):
1618
def __init__(self, child_pipe, fpr, address):
1619
self._pipe = child_pipe
1620
self._pipe.send(('init', fpr, address))
1621
if not self._pipe.recv():
1622
raise KeyError()
1623
1624
def __getattribute__(self, name):
1625
if name == '_pipe':
1626
return super(ProxyClient, self).__getattribute__(name)
1627
self._pipe.send(('getattr', name))
1628
data = self._pipe.recv()
1629
if data[0] == 'data':
1630
return data[1]
1631
if data[0] == 'function':
1632
def func(*args, **kwargs):
1633
self._pipe.send(('funcall', name, args, kwargs))
1634
return self._pipe.recv()[1]
1635
return func
1636
1637
def __setattr__(self, name, value):
1638
if name == '_pipe':
1639
return super(ProxyClient, self).__setattr__(name, value)
1640
self._pipe.send(('setattr', name, value))
1641
1642
1643
class ClientHandler(socketserver.BaseRequestHandler, object):
1644
"""A class to handle client connections.
1645
1646
Instantiated once for each connection to handle it.
647
1647
Note: This will run in its own forked process."""
648
1648
649
1649
def handle(self):
650
logger.info(u"TCP connection from: %s",
651
unicode(self.client_address))
652
session = (gnutls.connection
653
.ClientSession(self.request,
654
gnutls.connection
655
.X509Credentials()))
656
657
line = self.request.makefile().readline()
658
logger.debug(u"Protocol version: %r", line)
659
try:
660
if int(line.strip().split()[0]) > 1:
661
raise RuntimeError
662
except (ValueError, IndexError, RuntimeError), error:
663
logger.error(u"Unknown protocol version: %s", error)
664
return
665
666
# Note: gnutls.connection.X509Credentials is really a generic
667
# GnuTLS certificate credentials object so long as no X.509
668
# keys are added to it. Therefore, we can use it here despite
669
# using OpenPGP certificates.
670
671
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
672
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
673
# "+DHE-DSS"))
674
# Use a fallback default, since this MUST be set.
675
priority = self.server.settings.get("priority", "NORMAL")
676
(gnutls.library.functions
677
.gnutls_priority_set_direct(session._c_object,
678
priority, None))
679
680
try:
681
session.handshake()
682
except gnutls.errors.GNUTLSError, error:
683
logger.warning(u"Handshake failed: %s", error)
684
# Do not run session.bye() here: the session is not
685
# established. Just abandon the request.
686
return
687
try:
688
fpr = fingerprint(peer_certificate(session))
689
except (TypeError, gnutls.errors.GNUTLSError), error:
690
logger.warning(u"Bad certificate: %s", error)
691
session.bye()
692
return
693
logger.debug(u"Fingerprint: %s", fpr)
694
for c in self.server.clients:
695
if c.fingerprint == fpr:
696
client = c
697
break
698
else:
699
logger.warning(u"Client not found for fingerprint: %s",
700
fpr)
701
session.bye()
702
return
703
# Have to check if client.still_valid(), since it is possible
704
# that the client timed out while establishing the GnuTLS
705
# session.
706
if not client.still_valid():
707
logger.warning(u"Client %(name)s is invalid",
708
vars(client))
709
session.bye()
710
return
711
## This won't work here, since we're in a fork.
712
# client.bump_timeout()
713
sent_size = 0
714
while sent_size < len(client.secret):
715
sent = session.send(client.secret[sent_size:])
716
logger.debug(u"Sent: %d, remaining: %d",
717
sent, len(client.secret)
718
- (sent_size + sent))
719
sent_size += sent
720
session.bye()
721
722
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
SocketServer.TCPServer, object):
725
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1650
with contextlib.closing(self.server.child_pipe) as child_pipe:
1651
logger.info("TCP connection from: %s",
1652
unicode(self.client_address))
1653
logger.debug("Pipe FD: %d",
1654
self.server.child_pipe.fileno())
1655
1656
session = (gnutls.connection
1657
.ClientSession(self.request,
1658
gnutls.connection
1659
.X509Credentials()))
1660
1661
# Note: gnutls.connection.X509Credentials is really a
1662
# generic GnuTLS certificate credentials object so long as
1663
# no X.509 keys are added to it. Therefore, we can use it
1664
# here despite using OpenPGP certificates.
1665
1666
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1667
# "+AES-256-CBC", "+SHA1",
1668
# "+COMP-NULL", "+CTYPE-OPENPGP",
1669
# "+DHE-DSS"))
1670
# Use a fallback default, since this MUST be set.
1671
priority = self.server.gnutls_priority
1672
if priority is None:
1673
priority = "NORMAL"
1674
(gnutls.library.functions
1675
.gnutls_priority_set_direct(session._c_object,
1676
priority, None))
1677
1678
# Start communication using the Mandos protocol
1679
# Get protocol number
1680
line = self.request.makefile().readline()
1681
logger.debug("Protocol version: %r", line)
1682
try:
1683
if int(line.strip().split()[0]) > 1:
1684
raise RuntimeError
1685
except (ValueError, IndexError, RuntimeError) as error:
1686
logger.error("Unknown protocol version: %s", error)
1687
return
1688
1689
# Start GnuTLS connection
1690
try:
1691
session.handshake()
1692
except gnutls.errors.GNUTLSError as error:
1693
logger.warning("Handshake failed: %s", error)
1694
# Do not run session.bye() here: the session is not
1695
# established. Just abandon the request.
1696
return
1697
logger.debug("Handshake succeeded")
1698
1699
approval_required = False
1700
try:
1701
try:
1702
fpr = self.fingerprint(self.peer_certificate
1703
(session))
1704
except (TypeError,
1705
gnutls.errors.GNUTLSError) as error:
1706
logger.warning("Bad certificate: %s", error)
1707
return
1708
logger.debug("Fingerprint: %s", fpr)
1709
1710
try:
1711
client = ProxyClient(child_pipe, fpr,
1712
self.client_address)
1713
except KeyError:
1714
return
1715
1716
if client.approval_delay:
1717
delay = client.approval_delay
1718
client.approvals_pending += 1
1719
approval_required = True
1720
1721
while True:
1722
if not client.enabled:
1723
logger.info("Client %s is disabled",
1724
client.name)
1725
if self.server.use_dbus:
1726
# Emit D-Bus signal
1727
client.Rejected("Disabled")
1728
return
1729
1730
if client.approved or not client.approval_delay:
1731
#We are approved or approval is disabled
1732
break
1733
elif client.approved is None:
1734
logger.info("Client %s needs approval",
1735
client.name)
1736
if self.server.use_dbus:
1737
# Emit D-Bus signal
1738
client.NeedApproval(
1739
client.approval_delay_milliseconds(),
1740
client.approved_by_default)
1741
else:
1742
logger.warning("Client %s was not approved",
1743
client.name)
1744
if self.server.use_dbus:
1745
# Emit D-Bus signal
1746
client.Rejected("Denied")
1747
return
1748
1749
#wait until timeout or approved
1750
time = datetime.datetime.now()
1751
client.changedstate.acquire()
1752
client.changedstate.wait(
1753
float(timedelta_to_milliseconds(delay)
1754
/ 1000))
1755
client.changedstate.release()
1756
time2 = datetime.datetime.now()
1757
if (time2 - time) >= delay:
1758
if not client.approved_by_default:
1759
logger.warning("Client %s timed out while"
1760
" waiting for approval",
1761
client.name)
1762
if self.server.use_dbus:
1763
# Emit D-Bus signal
1764
client.Rejected("Approval timed out")
1765
return
1766
else:
1767
break
1768
else:
1769
delay -= time2 - time
1770
1771
sent_size = 0
1772
while sent_size < len(client.secret):
1773
try:
1774
sent = session.send(client.secret[sent_size:])
1775
except gnutls.errors.GNUTLSError as error:
1776
logger.warning("gnutls send failed",
1777
exc_info=error)
1778
return
1779
logger.debug("Sent: %d, remaining: %d",
1780
sent, len(client.secret)
1781
- (sent_size + sent))
1782
sent_size += sent
1783
1784
logger.info("Sending secret to %s", client.name)
1785
# bump the timeout using extended_timeout
1786
client.bump_timeout(client.extended_timeout)
1787
if self.server.use_dbus:
1788
# Emit D-Bus signal
1789
client.GotSecret()
1790
1791
finally:
1792
if approval_required:
1793
client.approvals_pending -= 1
1794
try:
1795
session.bye()
1796
except gnutls.errors.GNUTLSError as error:
1797
logger.warning("GnuTLS bye failed",
1798
exc_info=error)
1799
1800
@staticmethod
1801
def peer_certificate(session):
1802
"Return the peer's OpenPGP certificate as a bytestring"
1803
# If not an OpenPGP certificate...
1804
if (gnutls.library.functions
1805
.gnutls_certificate_type_get(session._c_object)
1806
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1807
# ...do the normal thing
1808
return session.peer_certificate
1809
list_size = ctypes.c_uint(1)
1810
cert_list = (gnutls.library.functions
1811
.gnutls_certificate_get_peers
1812
(session._c_object, ctypes.byref(list_size)))
1813
if not bool(cert_list) and list_size.value != 0:
1814
raise gnutls.errors.GNUTLSError("error getting peer"
1815
" certificate")
1816
if list_size.value == 0:
1817
return None
1818
cert = cert_list[0]
1819
return ctypes.string_at(cert.data, cert.size)
1820
1821
@staticmethod
1822
def fingerprint(openpgp):
1823
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1824
# New GnuTLS "datum" with the OpenPGP public key
1825
datum = (gnutls.library.types
1826
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1827
ctypes.POINTER
1828
(ctypes.c_ubyte)),
1829
ctypes.c_uint(len(openpgp))))
1830
# New empty GnuTLS certificate
1831
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1832
(gnutls.library.functions
1833
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1834
# Import the OpenPGP public key into the certificate
1835
(gnutls.library.functions
1836
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1837
gnutls.library.constants
1838
.GNUTLS_OPENPGP_FMT_RAW))
1839
# Verify the self signature in the key
1840
crtverify = ctypes.c_uint()
1841
(gnutls.library.functions
1842
.gnutls_openpgp_crt_verify_self(crt, 0,
1843
ctypes.byref(crtverify)))
1844
if crtverify.value != 0:
1845
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1846
raise (gnutls.errors.CertificateSecurityError
1847
("Verify failed"))
1848
# New buffer for the fingerprint
1849
buf = ctypes.create_string_buffer(20)
1850
buf_len = ctypes.c_size_t()
1851
# Get the fingerprint from the certificate into the buffer
1852
(gnutls.library.functions
1853
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1854
ctypes.byref(buf_len)))
1855
# Deinit the certificate
1856
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1857
# Convert the buffer to a Python bytestring
1858
fpr = ctypes.string_at(buf, buf_len.value)
1859
# Convert the bytestring to hexadecimal notation
1860
hex_fpr = binascii.hexlify(fpr).upper()
1861
return hex_fpr
1862
1863
1864
class MultiprocessingMixIn(object):
1865
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1866
def sub_process_main(self, request, address):
1867
try:
1868
self.finish_request(request, address)
1869
except Exception:
1870
self.handle_error(request, address)
1871
self.close_request(request)
1872
1873
def process_request(self, request, address):
1874
"""Start a new process to process the request."""
1875
proc = multiprocessing.Process(target = self.sub_process_main,
1876
args = (request, address))
1877
proc.start()
1878
return proc
1879
1880
1881
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1882
""" adds a pipe to the MixIn """
1883
def process_request(self, request, client_address):
1884
"""Overrides and wraps the original process_request().
1885
1886
This function creates a new pipe in self.pipe
1887
"""
1888
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1889
1890
proc = MultiprocessingMixIn.process_request(self, request,
1891
client_address)
1892
self.child_pipe.close()
1893
self.add_pipe(parent_pipe, proc)
1894
1895
def add_pipe(self, parent_pipe, proc):
1896
"""Dummy function; override as necessary"""
1897
raise NotImplementedError
1898
1899
1900
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1901
socketserver.TCPServer, object):
1902
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1903
726
1904
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
729
1905
enabled: Boolean; whether this server is activated yet
1906
interface: None or a network interface name (string)
1907
use_ipv6: Boolean; to use IPv6 or not
730
1908
"""
731
address_family = socket.AF_INET6
732
def __init__(self, *args, **kwargs):
733
if "settings" in kwargs:
734
self.settings = kwargs["settings"]
735
del kwargs["settings"]
736
if "clients" in kwargs:
737
self.clients = kwargs["clients"]
738
del kwargs["clients"]
739
self.enabled = False
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1909
def __init__(self, server_address, RequestHandlerClass,
1910
interface=None, use_ipv6=True, socketfd=None):
1911
"""If socketfd is set, use that file descriptor instead of
1912
creating a new one with socket.socket().
1913
"""
1914
self.interface = interface
1915
if use_ipv6:
1916
self.address_family = socket.AF_INET6
1917
if socketfd is not None:
1918
# Save the file descriptor
1919
self.socketfd = socketfd
1920
# Save the original socket.socket() function
1921
self.socket_socket = socket.socket
1922
# To implement --socket, we monkey patch socket.socket.
1923
#
1924
# (When socketserver.TCPServer is a new-style class, we
1925
# could make self.socket into a property instead of monkey
1926
# patching socket.socket.)
1927
#
1928
# Create a one-time-only replacement for socket.socket()
1929
@functools.wraps(socket.socket)
1930
def socket_wrapper(*args, **kwargs):
1931
# Restore original function so subsequent calls are
1932
# not affected.
1933
socket.socket = self.socket_socket
1934
del self.socket_socket
1935
# This time only, return a new socket object from the
1936
# saved file descriptor.
1937
return socket.fromfd(self.socketfd, *args, **kwargs)
1938
# Replace socket.socket() function with wrapper
1939
socket.socket = socket_wrapper
1940
# The socketserver.TCPServer.__init__ will call
1941
# socket.socket(), which might be our replacement,
1942
# socket_wrapper(), if socketfd was set.
1943
socketserver.TCPServer.__init__(self, server_address,
1944
RequestHandlerClass)
1945
741
1946
def server_bind(self):
742
1947
"""This overrides the normal server_bind() function
743
1948
to bind to an interface if one was specified, and also NOT to
744
1949
bind to an address or port if they were not specified."""
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
748
try:
749
self.socket.setsockopt(socket.SOL_SOCKET,
750
SO_BINDTODEVICE,
751
self.settings["interface"])
752
except socket.error, error:
753
if error[0] == errno.EPERM:
754
logger.error(u"No permission to"
755
u" bind to interface %s",
756
self.settings["interface"])
757
else:
758
raise error
1950
if self.interface is not None:
1951
if SO_BINDTODEVICE is None:
1952
logger.error("SO_BINDTODEVICE does not exist;"
1953
" cannot bind to interface %s",
1954
self.interface)
1955
else:
1956
try:
1957
self.socket.setsockopt(socket.SOL_SOCKET,
1958
SO_BINDTODEVICE,
1959
str(self.interface + '\0'))
1960
except socket.error as error:
1961
if error.errno == errno.EPERM:
1962
logger.error("No permission to bind to"
1963
" interface %s", self.interface)
1964
elif error.errno == errno.ENOPROTOOPT:
1965
logger.error("SO_BINDTODEVICE not available;"
1966
" cannot bind to interface %s",
1967
self.interface)
1968
elif error.errno == errno.ENODEV:
1969
logger.error("Interface %s does not exist,"
1970
" cannot bind", self.interface)
1971
else:
1972
raise
759
1973
# Only bind(2) the socket if we really need to.
760
1974
if self.server_address[0] or self.server_address[1]:
761
1975
if not self.server_address[0]:
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
1976
if self.address_family == socket.AF_INET6:
1977
any_address = "::" # in6addr_any
1978
else:
1979
any_address = socket.INADDR_ANY
1980
self.server_address = (any_address,
764
1981
self.server_address[1])
765
1982
elif not self.server_address[1]:
766
1983
self.server_address = (self.server_address[0],
767
1984
0)
768
# if self.settings["interface"]:
1985
# if self.interface:
769
1986
# self.server_address = (self.server_address[0],
770
1987
# 0, # port
771
1988
# 0, # flowinfo
772
1989
# if_nametoindex
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
1990
# (self.interface))
1991
return socketserver.TCPServer.server_bind(self)
1992
1993
1994
class MandosServer(IPv6_TCPServer):
1995
"""Mandos server.
1996
1997
Attributes:
1998
clients: set of Client objects
1999
gnutls_priority GnuTLS priority string
2000
use_dbus: Boolean; to emit D-Bus signals or not
2001
2002
Assumes a gobject.MainLoop event loop.
2003
"""
2004
def __init__(self, server_address, RequestHandlerClass,
2005
interface=None, use_ipv6=True, clients=None,
2006
gnutls_priority=None, use_dbus=True, socketfd=None):
2007
self.enabled = False
2008
self.clients = clients
2009
if self.clients is None:
2010
self.clients = {}
2011
self.use_dbus = use_dbus
2012
self.gnutls_priority = gnutls_priority
2013
IPv6_TCPServer.__init__(self, server_address,
2014
RequestHandlerClass,
2015
interface = interface,
2016
use_ipv6 = use_ipv6,
2017
socketfd = socketfd)
776
2018
def server_activate(self):
777
2019
if self.enabled:
778
return super(IPv6_TCPServer, self).server_activate()
2020
return socketserver.TCPServer.server_activate(self)
2021
779
2022
def enable(self):
780
2023
self.enabled = True
2024
2025
def add_pipe(self, parent_pipe, proc):
2026
# Call "handle_ipc" for both data and EOF events
2027
gobject.io_add_watch(parent_pipe.fileno(),
2028
gobject.IO_IN | gobject.IO_HUP,
2029
functools.partial(self.handle_ipc,
2030
parent_pipe =
2031
parent_pipe,
2032
proc = proc))
2033
2034
def handle_ipc(self, source, condition, parent_pipe=None,
2035
proc = None, client_object=None):
2036
# error, or the other end of multiprocessing.Pipe has closed
2037
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2038
# Wait for other process to exit
2039
proc.join()
2040
return False
2041
2042
# Read a request from the child
2043
request = parent_pipe.recv()
2044
command = request[0]
2045
2046
if command == 'init':
2047
fpr = request[1]
2048
address = request[2]
2049
2050
for c in self.clients.itervalues():
2051
if c.fingerprint == fpr:
2052
client = c
2053
break
2054
else:
2055
logger.info("Client not found for fingerprint: %s, ad"
2056
"dress: %s", fpr, address)
2057
if self.use_dbus:
2058
# Emit D-Bus signal
2059
mandos_dbus_service.ClientNotFound(fpr,
2060
address[0])
2061
parent_pipe.send(False)
2062
return False
2063
2064
gobject.io_add_watch(parent_pipe.fileno(),
2065
gobject.IO_IN | gobject.IO_HUP,
2066
functools.partial(self.handle_ipc,
2067
parent_pipe =
2068
parent_pipe,
2069
proc = proc,
2070
client_object =
2071
client))
2072
parent_pipe.send(True)
2073
# remove the old hook in favor of the new above hook on
2074
# same fileno
2075
return False
2076
if command == 'funcall':
2077
funcname = request[1]
2078
args = request[2]
2079
kwargs = request[3]
2080
2081
parent_pipe.send(('data', getattr(client_object,
2082
funcname)(*args,
2083
**kwargs)))
2084
2085
if command == 'getattr':
2086
attrname = request[1]
2087
if callable(client_object.__getattribute__(attrname)):
2088
parent_pipe.send(('function',))
2089
else:
2090
parent_pipe.send(('data', client_object
2091
.__getattribute__(attrname)))
2092
2093
if command == 'setattr':
2094
attrname = request[1]
2095
value = request[2]
2096
setattr(client_object, attrname, value)
2097
2098
return True
2099
2100
2101
def rfc3339_duration_to_delta(duration):
2102
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2103
2104
>>> rfc3339_duration_to_delta("P7D")
2105
datetime.timedelta(7)
2106
>>> rfc3339_duration_to_delta("PT60S")
2107
datetime.timedelta(0, 60)
2108
>>> rfc3339_duration_to_delta("PT60M")
2109
datetime.timedelta(0, 3600)
2110
>>> rfc3339_duration_to_delta("PT24H")
2111
datetime.timedelta(1)
2112
>>> rfc3339_duration_to_delta("P1W")
2113
datetime.timedelta(7)
2114
>>> rfc3339_duration_to_delta("PT5M30S")
2115
datetime.timedelta(0, 330)
2116
>>> rfc3339_duration_to_delta("P1DT3M20S")
2117
datetime.timedelta(1, 200)
2118
"""
2119
2120
# Parsing an RFC 3339 duration with regular expressions is not
2121
# possible - there would have to be multiple places for the same
2122
# values, like seconds. The current code, while more esoteric, is
2123
# cleaner without depending on a parsing library. If Python had a
2124
# built-in library for parsing we would use it, but we'd like to
2125
# avoid excessive use of external libraries.
2126
2127
# New type for defining tokens, syntax, and semantics all-in-one
2128
Token = collections.namedtuple("Token",
2129
("regexp", # To match token; if
2130
# "value" is not None,
2131
# must have a "group"
2132
# containing digits
2133
"value", # datetime.timedelta or
2134
# None
2135
"followers")) # Tokens valid after
2136
# this token
2137
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2138
# the "duration" ABNF definition in RFC 3339, Appendix A.
2139
token_end = Token(re.compile(r"$"), None, frozenset())
2140
token_second = Token(re.compile(r"(\d+)S"),
2141
datetime.timedelta(seconds=1),
2142
frozenset((token_end,)))
2143
token_minute = Token(re.compile(r"(\d+)M"),
2144
datetime.timedelta(minutes=1),
2145
frozenset((token_second, token_end)))
2146
token_hour = Token(re.compile(r"(\d+)H"),
2147
datetime.timedelta(hours=1),
2148
frozenset((token_minute, token_end)))
2149
token_time = Token(re.compile(r"T"),
2150
None,
2151
frozenset((token_hour, token_minute,
2152
token_second)))
2153
token_day = Token(re.compile(r"(\d+)D"),
2154
datetime.timedelta(days=1),
2155
frozenset((token_time, token_end)))
2156
token_month = Token(re.compile(r"(\d+)M"),
2157
datetime.timedelta(weeks=4),
2158
frozenset((token_day, token_end)))
2159
token_year = Token(re.compile(r"(\d+)Y"),
2160
datetime.timedelta(weeks=52),
2161
frozenset((token_month, token_end)))
2162
token_week = Token(re.compile(r"(\d+)W"),
2163
datetime.timedelta(weeks=1),
2164
frozenset((token_end,)))
2165
token_duration = Token(re.compile(r"P"), None,
2166
frozenset((token_year, token_month,
2167
token_day, token_time,
2168
token_week))),
2169
# Define starting values
2170
value = datetime.timedelta() # Value so far
2171
found_token = None
2172
followers = frozenset(token_duration,) # Following valid tokens
2173
s = duration # String left to parse
2174
# Loop until end token is found
2175
while found_token is not token_end:
2176
# Search for any currently valid tokens
2177
for token in followers:
2178
match = token.regexp.match(s)
2179
if match is not None:
2180
# Token found
2181
if token.value is not None:
2182
# Value found, parse digits
2183
factor = int(match.group(1), 10)
2184
# Add to value so far
2185
value += factor * token.value
2186
# Strip token from string
2187
s = token.regexp.sub("", s, 1)
2188
# Go to found token
2189
found_token = token
2190
# Set valid next tokens
2191
followers = found_token.followers
2192
break
2193
else:
2194
# No currently valid tokens were found
2195
raise ValueError("Invalid RFC 3339 duration")
2196
# End token found
2197
return value
781
2198
782
2199
783
2200
def string_to_delta(interval):
784
2201
"""Parse a string and return a datetime.timedelta
785
2202
786
2203
>>> string_to_delta('7d')
787
2204
datetime.timedelta(7)
788
2205
>>> string_to_delta('60s')
791
2208
datetime.timedelta(0, 3600)
792
2209
>>> string_to_delta('24h')
793
2210
datetime.timedelta(1)
794
>>> string_to_delta(u'1w')
2211
>>> string_to_delta('1w')
795
2212
datetime.timedelta(7)
796
2213
>>> string_to_delta('5m 30s')
797
2214
datetime.timedelta(0, 330)
798
2215
"""
2216
2217
try:
2218
return rfc3339_duration_to_delta(interval)
2219
except ValueError:
2220
pass
2221
799
2222
timevalue = datetime.timedelta(0)
800
2223
for s in interval.split():
801
2224
try:
802
2225
suffix = unicode(s[-1])
803
2226
value = int(s[:-1])
804
if suffix == u"d":
2227
if suffix == "d":
805
2228
delta = datetime.timedelta(value)
806
elif suffix == u"s":
2229
elif suffix == "s":
807
2230
delta = datetime.timedelta(0, value)
808
elif suffix == u"m":
2231
elif suffix == "m":
809
2232
delta = datetime.timedelta(0, 0, 0, 0, value)
810
elif suffix == u"h":
2233
elif suffix == "h":
811
2234
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
812
elif suffix == u"w":
2235
elif suffix == "w":
813
2236
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
814
2237
else:
815
raise ValueError
816
except (ValueError, IndexError):
817
raise ValueError
2238
raise ValueError("Unknown suffix {0!r}"
2239
.format(suffix))
2240
except (ValueError, IndexError) as e:
2241
raise ValueError(*(e.args))
818
2242
timevalue += delta
819
2243
return timevalue
820
2244
821
2245
822
def server_state_changed(state):
823
"""Derived from the Avahi example code"""
824
if state == avahi.SERVER_COLLISION:
825
logger.error(u"Zeroconf server name collision")
826
service.remove()
827
elif state == avahi.SERVER_RUNNING:
828
service.add()
829
830
831
def entry_group_state_changed(state, error):
832
"""Derived from the Avahi example code"""
833
logger.debug(u"Avahi state change: %i", state)
834
835
if state == avahi.ENTRY_GROUP_ESTABLISHED:
836
logger.debug(u"Zeroconf service established.")
837
elif state == avahi.ENTRY_GROUP_COLLISION:
838
logger.warning(u"Zeroconf service name collision.")
839
service.rename()
840
elif state == avahi.ENTRY_GROUP_FAILURE:
841
logger.critical(u"Avahi: Error in group state changed %s",
842
unicode(error))
843
raise AvahiGroupError(u"State changed: %s" % unicode(error))
844
845
def if_nametoindex(interface):
846
"""Call the C function if_nametoindex(), or equivalent"""
847
global if_nametoindex
848
try:
849
if_nametoindex = (ctypes.cdll.LoadLibrary
850
(ctypes.util.find_library("c"))
851
.if_nametoindex)
852
except (OSError, AttributeError):
853
if "struct" not in sys.modules:
854
import struct
855
if "fcntl" not in sys.modules:
856
import fcntl
857
def if_nametoindex(interface):
858
"Get an interface index the hard way, i.e. using fcntl()"
859
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
860
with closing(socket.socket()) as s:
861
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
864
return interface_index
865
return if_nametoindex(interface)
866
867
868
2246
def daemon(nochdir = False, noclose = False):
869
2247
"""See daemon(3). Standard BSD Unix function.
2248
870
2249
This should really exist as os.daemon, but it doesn't (yet)."""
871
2250
if os.fork():
872
2251
sys.exit()
877
2256
sys.exit()
878
2257
if not noclose:
879
2258
# Close all standard open file descriptors
880
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2259
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
881
2260
if not stat.S_ISCHR(os.fstat(null).st_mode):
882
2261
raise OSError(errno.ENODEV,
883
"/dev/null not a character device")
2262
"{0} not a character device"
2263
.format(os.devnull))
884
2264
os.dup2(null, sys.stdin.fileno())
885
2265
os.dup2(null, sys.stdout.fileno())
886
2266
os.dup2(null, sys.stderr.fileno())
889
2269
890
2270
891
2271
def main():
892
parser = OptionParser(version = "%%prog %s" % version)
893
parser.add_option("-i", "--interface", type="string",
894
metavar="IF", help="Bind to interface IF")
895
parser.add_option("-a", "--address", type="string",
896
help="Address to listen for requests on")
897
parser.add_option("-p", "--port", type="int",
898
help="Port number to receive requests on")
899
parser.add_option("--check", action="store_true",
900
help="Run self-test")
901
parser.add_option("--debug", action="store_true",
902
help="Debug mode; run in foreground and log to"
903
" terminal")
904
parser.add_option("--priority", type="string", help="GnuTLS"
905
" priority string (see GnuTLS documentation)")
906
parser.add_option("--servicename", type="string", metavar="NAME",
907
help="Zeroconf service name")
908
parser.add_option("--configdir", type="string",
909
default="/etc/mandos", metavar="DIR",
910
help="Directory to search for configuration"
911
" files")
912
parser.add_option("--no-dbus", action="store_false",
913
dest="use_dbus",
914
help="Do not provide D-Bus system bus"
915
" interface")
916
options = parser.parse_args()[0]
2272
2273
##################################################################
2274
# Parsing of options, both command line and config file
2275
2276
parser = argparse.ArgumentParser()
2277
parser.add_argument("-v", "--version", action="version",
2278
version = "%(prog)s {0}".format(version),
2279
help="show version number and exit")
2280
parser.add_argument("-i", "--interface", metavar="IF",
2281
help="Bind to interface IF")
2282
parser.add_argument("-a", "--address",
2283
help="Address to listen for requests on")
2284
parser.add_argument("-p", "--port", type=int,
2285
help="Port number to receive requests on")
2286
parser.add_argument("--check", action="store_true",
2287
help="Run self-test")
2288
parser.add_argument("--debug", action="store_true",
2289
help="Debug mode; run in foreground and log"
2290
" to terminal")
2291
parser.add_argument("--debuglevel", metavar="LEVEL",
2292
help="Debug level for stdout output")
2293
parser.add_argument("--priority", help="GnuTLS"
2294
" priority string (see GnuTLS documentation)")
2295
parser.add_argument("--servicename",
2296
metavar="NAME", help="Zeroconf service name")
2297
parser.add_argument("--configdir",
2298
default="/etc/mandos", metavar="DIR",
2299
help="Directory to search for configuration"
2300
" files")
2301
parser.add_argument("--no-dbus", action="store_false",
2302
dest="use_dbus", help="Do not provide D-Bus"
2303
" system bus interface")
2304
parser.add_argument("--no-ipv6", action="store_false",
2305
dest="use_ipv6", help="Do not use IPv6")
2306
parser.add_argument("--no-restore", action="store_false",
2307
dest="restore", help="Do not restore stored"
2308
" state")
2309
parser.add_argument("--socket", type=int,
2310
help="Specify a file descriptor to a network"
2311
" socket to use instead of creating one")
2312
parser.add_argument("--statedir", metavar="DIR",
2313
help="Directory to save/restore state in")
2314
parser.add_argument("--foreground", action="store_true",
2315
help="Run in foreground")
2316
2317
options = parser.parse_args()
917
2318
918
2319
if options.check:
919
2320
import doctest
929
2330
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
930
2331
"servicename": "Mandos",
931
2332
"use_dbus": "True",
2333
"use_ipv6": "True",
2334
"debuglevel": "",
2335
"restore": "True",
2336
"socket": "",
2337
"statedir": "/var/lib/mandos",
2338
"foreground": "False",
932
2339
}
933
2340
934
2341
# Parse config file for server-global settings
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
2342
server_config = configparser.SafeConfigParser(server_defaults)
936
2343
del server_defaults
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2344
server_config.read(os.path.join(options.configdir,
2345
"mandos.conf"))
938
2346
# Convert the SafeConfigParser object to a dict
939
2347
server_settings = server_config.defaults()
940
# Use getboolean on the boolean config options
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
943
server_settings["use_dbus"] = (server_config.getboolean
944
("DEFAULT", "use_dbus"))
2348
# Use the appropriate methods on the non-string config options
2349
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2350
server_settings[option] = server_config.getboolean("DEFAULT",
2351
option)
2352
if server_settings["port"]:
2353
server_settings["port"] = server_config.getint("DEFAULT",
2354
"port")
2355
if server_settings["socket"]:
2356
server_settings["socket"] = server_config.getint("DEFAULT",
2357
"socket")
2358
# Later, stdin will, and stdout and stderr might, be dup'ed
2359
# over with an opened os.devnull. But we don't want this to
2360
# happen with a supplied network socket.
2361
if 0 <= server_settings["socket"] <= 2:
2362
server_settings["socket"] = os.dup(server_settings
2363
["socket"])
945
2364
del server_config
946
2365
947
2366
# Override the settings from the config file with command line
948
2367
# options, if set.
949
2368
for option in ("interface", "address", "port", "debug",
950
2369
"priority", "servicename", "configdir",
951
"use_dbus"):
2370
"use_dbus", "use_ipv6", "debuglevel", "restore",
2371
"statedir", "socket", "foreground"):
952
2372
value = getattr(options, option)
953
2373
if value is not None:
954
2374
server_settings[option] = value
955
2375
del options
2376
# Force all strings to be unicode
2377
for option in server_settings.keys():
2378
if type(server_settings[option]) is str:
2379
server_settings[option] = unicode(server_settings[option])
2380
# Debug implies foreground
2381
if server_settings["debug"]:
2382
server_settings["foreground"] = True
956
2383
# Now we have our good server settings in "server_settings"
957
2384
2385
##################################################################
2386
958
2387
# For convenience
959
2388
debug = server_settings["debug"]
2389
debuglevel = server_settings["debuglevel"]
960
2390
use_dbus = server_settings["use_dbus"]
2391
use_ipv6 = server_settings["use_ipv6"]
2392
stored_state_path = os.path.join(server_settings["statedir"],
2393
stored_state_file)
2394
foreground = server_settings["foreground"]
961
2395
962
if not debug:
963
syslogger.setLevel(logging.WARNING)
964
console.setLevel(logging.WARNING)
2396
if debug:
2397
initlogger(debug, logging.DEBUG)
2398
else:
2399
if not debuglevel:
2400
initlogger(debug)
2401
else:
2402
level = getattr(logging, debuglevel.upper())
2403
initlogger(debug, level)
965
2404
966
2405
if server_settings["servicename"] != "Mandos":
967
2406
syslogger.setFormatter(logging.Formatter
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
970
% server_settings["servicename"]))
2407
('Mandos ({0}) [%(process)d]:'
2408
' %(levelname)s: %(message)s'
2409
.format(server_settings
2410
["servicename"])))
971
2411
972
2412
# Parse config file with clients
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %%(host)s",
976
"host": "",
977
}
978
client_config = ConfigParser.SafeConfigParser(client_defaults)
2413
client_config = configparser.SafeConfigParser(Client
2414
.client_defaults)
979
2415
client_config.read(os.path.join(server_settings["configdir"],
980
2416
"clients.conf"))
981
2417
982
clients = Set()
983
tcp_server = IPv6_TCPServer((server_settings["address"],
984
server_settings["port"]),
985
TCP_handler,
986
settings=server_settings,
987
clients=clients)
988
pidfilename = "/var/run/mandos.pid"
989
try:
990
pidfile = open(pidfilename, "w")
991
except IOError, error:
992
logger.error("Could not open file %r", pidfilename)
993
994
try:
995
uid = pwd.getpwnam("_mandos").pw_uid
996
gid = pwd.getpwnam("_mandos").pw_gid
997
except KeyError:
998
try:
999
uid = pwd.getpwnam("mandos").pw_uid
1000
gid = pwd.getpwnam("mandos").pw_gid
2418
global mandos_dbus_service
2419
mandos_dbus_service = None
2420
2421
tcp_server = MandosServer((server_settings["address"],
2422
server_settings["port"]),
2423
ClientHandler,
2424
interface=(server_settings["interface"]
2425
or None),
2426
use_ipv6=use_ipv6,
2427
gnutls_priority=
2428
server_settings["priority"],
2429
use_dbus=use_dbus,
2430
socketfd=(server_settings["socket"]
2431
or None))
2432
if not foreground:
2433
pidfilename = "/var/run/mandos.pid"
2434
pidfile = None
2435
try:
2436
pidfile = open(pidfilename, "w")
2437
except IOError as e:
2438
logger.error("Could not open file %r", pidfilename,
2439
exc_info=e)
2440
2441
for name in ("_mandos", "mandos", "nobody"):
2442
try:
2443
uid = pwd.getpwnam(name).pw_uid
2444
gid = pwd.getpwnam(name).pw_gid
2445
break
1001
2446
except KeyError:
1002
try:
1003
uid = pwd.getpwnam("nobody").pw_uid
1004
gid = pwd.getpwnam("nogroup").pw_gid
1005
except KeyError:
1006
uid = 65534
1007
gid = 65534
2447
continue
2448
else:
2449
uid = 65534
2450
gid = 65534
1008
2451
try:
2452
os.setgid(gid)
1009
2453
os.setuid(uid)
1010
os.setgid(gid)
1011
except OSError, error:
1012
if error[0] != errno.EPERM:
2454
except OSError as error:
2455
if error.errno != errno.EPERM:
1013
2456
raise error
1014
2457
1015
global service
1016
service = AvahiService(name = server_settings["servicename"],
1017
servicetype = "_mandos._tcp", )
1018
if server_settings["interface"]:
1019
service.interface = (if_nametoindex
1020
(server_settings["interface"]))
2458
if debug:
2459
# Enable all possible GnuTLS debugging
2460
2461
# "Use a log level over 10 to enable all debugging options."
2462
# - GnuTLS manual
2463
gnutls.library.functions.gnutls_global_set_log_level(11)
2464
2465
@gnutls.library.types.gnutls_log_func
2466
def debug_gnutls(level, string):
2467
logger.debug("GnuTLS: %s", string[:-1])
2468
2469
(gnutls.library.functions
2470
.gnutls_global_set_log_function(debug_gnutls))
2471
2472
# Redirect stdin so all checkers get /dev/null
2473
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2474
os.dup2(null, sys.stdin.fileno())
2475
if null > 2:
2476
os.close(null)
2477
2478
# Need to fork before connecting to D-Bus
2479
if not foreground:
2480
# Close all input and output, do double fork, etc.
2481
daemon()
2482
2483
# multiprocessing will use threads, so before we use gobject we
2484
# need to inform gobject that threads will be used.
2485
gobject.threads_init()
1021
2486
1022
2487
global main_loop
1023
global bus
1024
global server
1025
2488
# From the Avahi example code
1026
DBusGMainLoop(set_as_default=True )
2489
DBusGMainLoop(set_as_default=True)
1027
2490
main_loop = gobject.MainLoop()
1028
2491
bus = dbus.SystemBus()
1029
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1030
avahi.DBUS_PATH_SERVER),
1031
avahi.DBUS_INTERFACE_SERVER)
1032
2492
# End of Avahi example code
1033
2493
if use_dbus:
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1035
bus)
1036
1037
clients.update(Set(Client(name = section,
1038
config
1039
= dict(client_config.items(section)),
1040
use_dbus = use_dbus)
1041
for section in client_config.sections()))
1042
if not clients:
1043
logger.warning(u"No clients defined")
1044
1045
if debug:
1046
# Redirect stdin so all checkers get /dev/null
1047
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1048
os.dup2(null, sys.stdin.fileno())
1049
if null > 2:
1050
os.close(null)
1051
else:
1052
# No console logging
1053
logger.removeHandler(console)
1054
# Close all input and output, do double fork, etc.
1055
daemon()
1056
1057
try:
1058
pid = os.getpid()
1059
pidfile.write(str(pid) + "\n")
1060
pidfile.close()
2494
try:
2495
bus_name = dbus.service.BusName("se.recompile.Mandos",
2496
bus, do_not_queue=True)
2497
old_bus_name = (dbus.service.BusName
2498
("se.bsnet.fukt.Mandos", bus,
2499
do_not_queue=True))
2500
except dbus.exceptions.NameExistsException as e:
2501
logger.error("Disabling D-Bus:", exc_info=e)
2502
use_dbus = False
2503
server_settings["use_dbus"] = False
2504
tcp_server.use_dbus = False
2505
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2506
service = AvahiServiceToSyslog(name =
2507
server_settings["servicename"],
2508
servicetype = "_mandos._tcp",
2509
protocol = protocol, bus = bus)
2510
if server_settings["interface"]:
2511
service.interface = (if_nametoindex
2512
(str(server_settings["interface"])))
2513
2514
global multiprocessing_manager
2515
multiprocessing_manager = multiprocessing.Manager()
2516
2517
client_class = Client
2518
if use_dbus:
2519
client_class = functools.partial(ClientDBus, bus = bus)
2520
2521
client_settings = Client.config_parser(client_config)
2522
old_client_settings = {}
2523
clients_data = {}
2524
2525
# Get client data and settings from last running state.
2526
if server_settings["restore"]:
2527
try:
2528
with open(stored_state_path, "rb") as stored_state:
2529
clients_data, old_client_settings = (pickle.load
2530
(stored_state))
2531
os.remove(stored_state_path)
2532
except IOError as e:
2533
if e.errno == errno.ENOENT:
2534
logger.warning("Could not load persistent state: {0}"
2535
.format(os.strerror(e.errno)))
2536
else:
2537
logger.critical("Could not load persistent state:",
2538
exc_info=e)
2539
raise
2540
except EOFError as e:
2541
logger.warning("Could not load persistent state: "
2542
"EOFError:", exc_info=e)
2543
2544
with PGPEngine() as pgp:
2545
for client_name, client in clients_data.iteritems():
2546
# Decide which value to use after restoring saved state.
2547
# We have three different values: Old config file,
2548
# new config file, and saved state.
2549
# New config value takes precedence if it differs from old
2550
# config value, otherwise use saved state.
2551
for name, value in client_settings[client_name].items():
2552
try:
2553
# For each value in new config, check if it
2554
# differs from the old config value (Except for
2555
# the "secret" attribute)
2556
if (name != "secret" and
2557
value != old_client_settings[client_name]
2558
[name]):
2559
client[name] = value
2560
except KeyError:
2561
pass
2562
2563
# Clients who has passed its expire date can still be
2564
# enabled if its last checker was successful. Clients
2565
# whose checker succeeded before we stored its state is
2566
# assumed to have successfully run all checkers during
2567
# downtime.
2568
if client["enabled"]:
2569
if datetime.datetime.utcnow() >= client["expires"]:
2570
if not client["last_checked_ok"]:
2571
logger.warning(
2572
"disabling client {0} - Client never "
2573
"performed a successful checker"
2574
.format(client_name))
2575
client["enabled"] = False
2576
elif client["last_checker_status"] != 0:
2577
logger.warning(
2578
"disabling client {0} - Client "
2579
"last checker failed with error code {1}"
2580
.format(client_name,
2581
client["last_checker_status"]))
2582
client["enabled"] = False
2583
else:
2584
client["expires"] = (datetime.datetime
2585
.utcnow()
2586
+ client["timeout"])
2587
logger.debug("Last checker succeeded,"
2588
" keeping {0} enabled"
2589
.format(client_name))
2590
try:
2591
client["secret"] = (
2592
pgp.decrypt(client["encrypted_secret"],
2593
client_settings[client_name]
2594
["secret"]))
2595
except PGPError:
2596
# If decryption fails, we use secret from new settings
2597
logger.debug("Failed to decrypt {0} old secret"
2598
.format(client_name))
2599
client["secret"] = (
2600
client_settings[client_name]["secret"])
2601
2602
# Add/remove clients based on new changes made to config
2603
for client_name in (set(old_client_settings)
2604
- set(client_settings)):
2605
del clients_data[client_name]
2606
for client_name in (set(client_settings)
2607
- set(old_client_settings)):
2608
clients_data[client_name] = client_settings[client_name]
2609
2610
# Create all client objects
2611
for client_name, client in clients_data.iteritems():
2612
tcp_server.clients[client_name] = client_class(
2613
name = client_name, settings = client)
2614
2615
if not tcp_server.clients:
2616
logger.warning("No clients defined")
2617
2618
if not foreground:
2619
if pidfile is not None:
2620
try:
2621
with pidfile:
2622
pid = os.getpid()
2623
pidfile.write(str(pid) + "\n".encode("utf-8"))
2624
except IOError:
2625
logger.error("Could not write to file %r with PID %d",
2626
pidfilename, pid)
1061
2627
del pidfile
1062
except IOError:
1063
logger.error(u"Could not write to file %r with PID %d",
1064
pidfilename, pid)
1065
except NameError:
1066
# "pidfile" was never created
1067
pass
1068
del pidfilename
1069
1070
def cleanup():
1071
"Cleanup function; run on exit"
1072
global group
1073
# From the Avahi example code
1074
if not group is None:
1075
group.Free()
1076
group = None
1077
# End of Avahi example code
1078
1079
while clients:
1080
client = clients.pop()
1081
client.disable_hook = None
1082
client.disable()
1083
1084
atexit.register(cleanup)
1085
1086
if not debug:
1087
signal.signal(signal.SIGINT, signal.SIG_IGN)
2628
del pidfilename
2629
1088
2630
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1089
2631
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1090
2632
1091
2633
if use_dbus:
1092
class MandosServer(dbus.service.Object):
2634
@alternate_dbus_interfaces({"se.recompile.Mandos":
2635
"se.bsnet.fukt.Mandos"})
2636
class MandosDBusService(DBusObjectWithProperties):
1093
2637
"""A D-Bus proxy object"""
1094
2638
def __init__(self):
1095
dbus.service.Object.__init__(self, bus,
1096
"/Mandos")
1097
_interface = u"org.mandos_system.Mandos"
1098
1099
@dbus.service.signal(_interface, signature="oa{sv}")
1100
def ClientAdded(self, objpath, properties):
1101
"D-Bus signal"
1102
pass
1103
2639
dbus.service.Object.__init__(self, bus, "/")
2640
_interface = "se.recompile.Mandos"
2641
2642
@dbus_interface_annotations(_interface)
2643
def _foo(self):
2644
return { "org.freedesktop.DBus.Property"
2645
".EmitsChangedSignal":
2646
"false"}
2647
1104
2648
@dbus.service.signal(_interface, signature="o")
1105
def ClientRemoved(self, objpath):
1106
"D-Bus signal"
1107
pass
1108
2649
def ClientAdded(self, objpath):
2650
"D-Bus signal"
2651
pass
2652
2653
@dbus.service.signal(_interface, signature="ss")
2654
def ClientNotFound(self, fingerprint, address):
2655
"D-Bus signal"
2656
pass
2657
2658
@dbus.service.signal(_interface, signature="os")
2659
def ClientRemoved(self, objpath, name):
2660
"D-Bus signal"
2661
pass
2662
1109
2663
@dbus.service.method(_interface, out_signature="ao")
1110
2664
def GetAllClients(self):
1111
return dbus.Array(c.dbus_object_path for c in clients)
1112
1113
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2665
"D-Bus method"
2666
return dbus.Array(c.dbus_object_path
2667
for c in
2668
tcp_server.clients.itervalues())
2669
2670
@dbus.service.method(_interface,
2671
out_signature="a{oa{sv}}")
1114
2672
def GetAllClientsWithProperties(self):
2673
"D-Bus method"
1115
2674
return dbus.Dictionary(
1116
((c.dbus_object_path, c.GetAllProperties())
1117
for c in clients),
2675
((c.dbus_object_path, c.GetAll(""))
2676
for c in tcp_server.clients.itervalues()),
1118
2677
signature="oa{sv}")
1119
2678
1120
2679
@dbus.service.method(_interface, in_signature="o")
1121
2680
def RemoveClient(self, object_path):
1122
for c in clients:
2681
"D-Bus method"
2682
for c in tcp_server.clients.itervalues():
1123
2683
if c.dbus_object_path == object_path:
1124
clients.remove(c)
2684
del tcp_server.clients[c.name]
2685
c.remove_from_connection()
1125
2686
# Don't signal anything except ClientRemoved
1126
c.use_dbus = False
1127
c.disable()
2687
c.disable(quiet=True)
1128
2688
# Emit D-Bus signal
1129
self.ClientRemoved(object_path)
2689
self.ClientRemoved(object_path, c.name)
1130
2690
return
1131
raise KeyError
1132
@dbus.service.method(_interface)
1133
def Quit(self):
1134
main_loop.quit()
1135
2691
raise KeyError(object_path)
2692
1136
2693
del _interface
1137
1138
mandos_server = MandosServer()
1139
1140
for client in clients:
2694
2695
mandos_dbus_service = MandosDBusService()
2696
2697
def cleanup():
2698
"Cleanup function; run on exit"
2699
service.cleanup()
2700
2701
multiprocessing.active_children()
2702
if not (tcp_server.clients or client_settings):
2703
return
2704
2705
# Store client before exiting. Secrets are encrypted with key
2706
# based on what config file has. If config file is
2707
# removed/edited, old secret will thus be unrecovable.
2708
clients = {}
2709
with PGPEngine() as pgp:
2710
for client in tcp_server.clients.itervalues():
2711
key = client_settings[client.name]["secret"]
2712
client.encrypted_secret = pgp.encrypt(client.secret,
2713
key)
2714
client_dict = {}
2715
2716
# A list of attributes that can not be pickled
2717
# + secret.
2718
exclude = set(("bus", "changedstate", "secret",
2719
"checker"))
2720
for name, typ in (inspect.getmembers
2721
(dbus.service.Object)):
2722
exclude.add(name)
2723
2724
client_dict["encrypted_secret"] = (client
2725
.encrypted_secret)
2726
for attr in client.client_structure:
2727
if attr not in exclude:
2728
client_dict[attr] = getattr(client, attr)
2729
2730
clients[client.name] = client_dict
2731
del client_settings[client.name]["secret"]
2732
2733
try:
2734
with (tempfile.NamedTemporaryFile
2735
(mode='wb', suffix=".pickle", prefix='clients-',
2736
dir=os.path.dirname(stored_state_path),
2737
delete=False)) as stored_state:
2738
pickle.dump((clients, client_settings), stored_state)
2739
tempname=stored_state.name
2740
os.rename(tempname, stored_state_path)
2741
except (IOError, OSError) as e:
2742
if not debug:
2743
try:
2744
os.remove(tempname)
2745
except NameError:
2746
pass
2747
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2748
logger.warning("Could not save persistent state: {0}"
2749
.format(os.strerror(e.errno)))
2750
else:
2751
logger.warning("Could not save persistent state:",
2752
exc_info=e)
2753
raise e
2754
2755
# Delete all clients, and settings from config
2756
while tcp_server.clients:
2757
name, client = tcp_server.clients.popitem()
2758
if use_dbus:
2759
client.remove_from_connection()
2760
# Don't signal anything except ClientRemoved
2761
client.disable(quiet=True)
2762
if use_dbus:
2763
# Emit D-Bus signal
2764
mandos_dbus_service.ClientRemoved(client
2765
.dbus_object_path,
2766
client.name)
2767
client_settings.clear()
2768
2769
atexit.register(cleanup)
2770
2771
for client in tcp_server.clients.itervalues():
1141
2772
if use_dbus:
1142
2773
# Emit D-Bus signal
1143
mandos_server.ClientAdded(client.dbus_object_path,
1144
client.GetAllProperties())
1145
client.enable()
2774
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2775
# Need to initiate checking of clients
2776
if client.enabled:
2777
client.init_checker()
1146
2778
1147
2779
tcp_server.enable()
1148
2780
tcp_server.server_activate()
1149
2781
1150
2782
# Find out what port we got
1151
2783
service.port = tcp_server.socket.getsockname()[1]
1152
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1153
u" scope_id %d" % tcp_server.socket.getsockname())
2784
if use_ipv6:
2785
logger.info("Now listening on address %r, port %d,"
2786
" flowinfo %d, scope_id %d",
2787
*tcp_server.socket.getsockname())
2788
else: # IPv4
2789
logger.info("Now listening on address %r, port %d",
2790
*tcp_server.socket.getsockname())
1154
2791
1155
2792
#service.interface = tcp_server.socket.getsockname()[3]
1156
2793
1157
2794
try:
1158
2795
# From the Avahi example code
1159
server.connect_to_signal("StateChanged", server_state_changed)
1160
2796
try:
1161
server_state_changed(server.GetState())
1162
except dbus.exceptions.DBusException, error:
1163
logger.critical(u"DBusException: %s", error)
2797
service.activate()
2798
except dbus.exceptions.DBusException as error:
2799
logger.critical("D-Bus Exception", exc_info=error)
2800
cleanup()
1164
2801
sys.exit(1)
1165
2802
# End of Avahi example code
1166
2803
1169
2806
(tcp_server.handle_request
1170
2807
(*args[2:], **kwargs) or True))
1171
2808
1172
logger.debug(u"Starting main loop")
2809
logger.debug("Starting main loop")
1173
2810
main_loop.run()
1174
except AvahiError, error:
1175
logger.critical(u"AvahiError: %s", error)
2811
except AvahiError as error:
2812
logger.critical("Avahi Error", exc_info=error)
2813
cleanup()
1176
2814
sys.exit(1)
1177
2815
except KeyboardInterrupt:
1178
2816
if debug:
1179
print
2817
print("", file=sys.stderr)
2818
logger.debug("Server received KeyboardInterrupt")
2819
logger.debug("Server exiting")
2820
# Must run before the D-Bus bus name gets deregistered
2821
cleanup()
1180
2822
1181
2823
if __name__ == '__main__':
1182
2824
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0