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- Committer: Teddy Hogeborn
- Date: 2014-01-21 21:04:25 UTC
- mto: This revision was merged to the branch mainline in revision 653.
- Revision ID: teddy@recompile.se-20140121210425-j1bgxxghrb751jej
Tags: version-1.6.3-1
* Makefile (version): Changed to "1.3.2".
* NEWS (Version 1.6.3): New entry.
* debian/changelog (1.6.3-1): - '' -
* NEWS (Version 1.6.3): New entry.
* debian/changelog (1.6.3-1): - '' -
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
import SocketServer as socketserver
37
40
import socket
38
import optparse
41
import argparse
39
42
import datetime
40
43
import errno
41
44
import gnutls.crypto
44
47
import gnutls.library.functions
45
48
import gnutls.library.constants
46
49
import gnutls.library.types
47
import ConfigParser
50
import ConfigParser as configparser
48
51
import sys
49
52
import re
50
53
import os
51
54
import signal
52
from sets import Set
53
55
import subprocess
54
56
import atexit
55
57
import stat
56
58
import logging
57
59
import logging.handlers
58
60
import pwd
59
from contextlib import closing
61
import contextlib
62
import struct
63
import fcntl
64
import functools
65
import cPickle as pickle
66
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
60
72
61
73
import dbus
62
74
import dbus.service
65
77
from dbus.mainloop.glib import DBusGMainLoop
66
78
import ctypes
67
79
import ctypes.util
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
80
import xml.dom.minidom
81
import inspect
82
83
try:
84
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
except AttributeError:
86
try:
87
from IN import SO_BINDTODEVICE
88
except ImportError:
89
SO_BINDTODEVICE = None
90
91
version = "1.6.3"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
72
95
syslogger = (logging.handlers.SysLogHandler
73
96
(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)
97
address = str("/dev/log")))
98
99
try:
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
102
.if_nametoindex)
103
except (OSError, AttributeError):
104
def if_nametoindex(interface):
105
"Get an interface index the hard way, i.e. using fcntl()"
106
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
with contextlib.closing(socket.socket()) as s:
108
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
110
interface))
111
interface_index = struct.unpack(str("I"),
112
ifreq[16:20])[0]
113
return interface_index
114
115
116
def initlogger(debug, level=logging.WARNING):
117
"""init logger and add loglevel"""
118
119
syslogger.setFormatter(logging.Formatter
120
('Mandos [%(process)d]: %(levelname)s:'
121
' %(message)s'))
122
logger.addHandler(syslogger)
123
124
if debug:
125
console = logging.StreamHandler()
126
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
' [%(process)d]:'
128
' %(levelname)s:'
129
' %(message)s'))
130
logger.addHandler(console)
131
logger.setLevel(level)
132
133
134
class PGPError(Exception):
135
"""Exception if encryption/decryption fails"""
136
pass
137
138
139
class PGPEngine(object):
140
"""A simple class for OpenPGP symmetric encryption & decryption"""
141
def __init__(self):
142
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
143
self.gnupgargs = ['--batch',
144
'--home', self.tempdir,
145
'--force-mdc',
146
'--quiet',
147
'--no-use-agent']
148
149
def __enter__(self):
150
return self
151
152
def __exit__(self, exc_type, exc_value, traceback):
153
self._cleanup()
154
return False
155
156
def __del__(self):
157
self._cleanup()
158
159
def _cleanup(self):
160
if self.tempdir is not None:
161
# Delete contents of tempdir
162
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
164
for filename in files:
165
os.remove(os.path.join(root, filename))
166
for dirname in dirs:
167
os.rmdir(os.path.join(root, dirname))
168
# Remove tempdir
169
os.rmdir(self.tempdir)
170
self.tempdir = None
171
172
def password_encode(self, password):
173
# Passphrase can not be empty and can not contain newlines or
174
# NUL bytes. So we prefix it and hex encode it.
175
encoded = b"mandos" + binascii.hexlify(password)
176
if len(encoded) > 2048:
177
# GnuPG can't handle long passwords, so encode differently
178
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
179
.replace(b"\n", b"\\n")
180
.replace(b"\0", b"\\x00"))
181
return encoded
182
183
def encrypt(self, data, password):
184
passphrase = self.password_encode(password)
185
with tempfile.NamedTemporaryFile(dir=self.tempdir
186
) as passfile:
187
passfile.write(passphrase)
188
passfile.flush()
189
proc = subprocess.Popen(['gpg', '--symmetric',
190
'--passphrase-file',
191
passfile.name]
192
+ self.gnupgargs,
193
stdin = subprocess.PIPE,
194
stdout = subprocess.PIPE,
195
stderr = subprocess.PIPE)
196
ciphertext, err = proc.communicate(input = data)
197
if proc.returncode != 0:
198
raise PGPError(err)
199
return ciphertext
200
201
def decrypt(self, data, password):
202
passphrase = self.password_encode(password)
203
with tempfile.NamedTemporaryFile(dir = self.tempdir
204
) as passfile:
205
passfile.write(passphrase)
206
passfile.flush()
207
proc = subprocess.Popen(['gpg', '--decrypt',
208
'--passphrase-file',
209
passfile.name]
210
+ self.gnupgargs,
211
stdin = subprocess.PIPE,
212
stdout = subprocess.PIPE,
213
stderr = subprocess.PIPE)
214
decrypted_plaintext, err = proc.communicate(input
215
= data)
216
if proc.returncode != 0:
217
raise PGPError(err)
218
return decrypted_plaintext
219
83
220
84
221
class AvahiError(Exception):
85
222
def __init__(self, value, *args, **kwargs):
97
234
98
235
class AvahiService(object):
99
236
"""An Avahi (Zeroconf) service.
237
100
238
Attributes:
101
239
interface: integer; avahi.IF_UNSPEC or an interface index.
102
240
Used to optionally bind to the specified interface.
103
241
name: string; Example: 'Mandos'
104
242
type: string; Example: '_mandos._tcp'.
105
See <http://www.dns-sd.org/ServiceTypes.html>
243
See <https://www.iana.org/assignments/service-names-port-numbers>
106
244
port: integer; what port to announce
107
245
TXT: list of strings; TXT record for the service
108
246
domain: string; Domain to publish on, default to .local if empty.
110
248
max_renames: integer; maximum number of renames
111
249
rename_count: integer; counter so we only rename after collisions
112
250
a sensible number of times
251
group: D-Bus Entry Group
252
server: D-Bus Server
253
bus: dbus.SystemBus()
113
254
"""
255
114
256
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
257
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
258
domain = "", host = "", max_renames = 32768,
259
protocol = avahi.PROTO_UNSPEC, bus = None):
117
260
self.interface = interface
118
261
self.name = name
119
262
self.type = servicetype
123
266
self.host = host
124
267
self.rename_count = 0
125
268
self.max_renames = max_renames
269
self.protocol = protocol
270
self.group = None # our entry group
271
self.server = None
272
self.bus = bus
273
self.entry_group_state_changed_match = None
274
126
275
def rename(self):
127
276
"""Derived from the Avahi example code"""
128
277
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
278
logger.critical("No suitable Zeroconf service name found"
279
" after %i retries, exiting.",
131
280
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))
281
raise AvahiServiceError("Too many renames")
282
self.name = unicode(self.server
283
.GetAlternativeServiceName(self.name))
284
logger.info("Changing Zeroconf service name to %r ...",
285
self.name)
139
286
self.remove()
140
self.add()
287
try:
288
self.add()
289
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
291
self.cleanup()
292
os._exit(1)
141
293
self.rename_count += 1
294
142
295
def remove(self):
143
296
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
297
if self.entry_group_state_changed_match is not None:
298
self.entry_group_state_changed_match.remove()
299
self.entry_group_state_changed_match = None
300
if self.group is not None:
301
self.group.Reset()
302
146
303
def add(self):
147
304
"""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):
305
self.remove()
306
if self.group is None:
307
self.group = dbus.Interface(
308
self.bus.get_object(avahi.DBUS_NAME,
309
self.server.EntryGroupNew()),
310
avahi.DBUS_INTERFACE_ENTRY_GROUP)
311
self.entry_group_state_changed_match = (
312
self.group.connect_to_signal(
313
'StateChanged', self.entry_group_state_changed))
314
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
315
self.name, self.type)
316
self.group.AddService(
317
self.interface,
318
self.protocol,
319
dbus.UInt32(0), # flags
320
self.name, self.type,
321
self.domain, self.host,
322
dbus.UInt16(self.port),
323
avahi.string_array_to_txt_array(self.TXT))
324
self.group.Commit()
325
326
def entry_group_state_changed(self, state, error):
327
"""Derived from the Avahi example code"""
328
logger.debug("Avahi entry group state change: %i", state)
329
330
if state == avahi.ENTRY_GROUP_ESTABLISHED:
331
logger.debug("Zeroconf service established.")
332
elif state == avahi.ENTRY_GROUP_COLLISION:
333
logger.info("Zeroconf service name collision.")
334
self.rename()
335
elif state == avahi.ENTRY_GROUP_FAILURE:
336
logger.critical("Avahi: Error in group state changed %s",
337
unicode(error))
338
raise AvahiGroupError("State changed: {0!s}"
339
.format(error))
340
341
def cleanup(self):
342
"""Derived from the Avahi example code"""
343
if self.group is not None:
344
try:
345
self.group.Free()
346
except (dbus.exceptions.UnknownMethodException,
347
dbus.exceptions.DBusException):
348
pass
349
self.group = None
350
self.remove()
351
352
def server_state_changed(self, state, error=None):
353
"""Derived from the Avahi example code"""
354
logger.debug("Avahi server state change: %i", state)
355
bad_states = { avahi.SERVER_INVALID:
356
"Zeroconf server invalid",
357
avahi.SERVER_REGISTERING: None,
358
avahi.SERVER_COLLISION:
359
"Zeroconf server name collision",
360
avahi.SERVER_FAILURE:
361
"Zeroconf server failure" }
362
if state in bad_states:
363
if bad_states[state] is not None:
364
if error is None:
365
logger.error(bad_states[state])
366
else:
367
logger.error(bad_states[state] + ": %r", error)
368
self.cleanup()
369
elif state == avahi.SERVER_RUNNING:
370
self.add()
371
else:
372
if error is None:
373
logger.debug("Unknown state: %r", state)
374
else:
375
logger.debug("Unknown state: %r: %r", state, error)
376
377
def activate(self):
378
"""Derived from the Avahi example code"""
379
if self.server is None:
380
self.server = dbus.Interface(
381
self.bus.get_object(avahi.DBUS_NAME,
382
avahi.DBUS_PATH_SERVER,
383
follow_name_owner_changes=True),
384
avahi.DBUS_INTERFACE_SERVER)
385
self.server.connect_to_signal("StateChanged",
386
self.server_state_changed)
387
self.server_state_changed(self.server.GetState())
388
389
390
class AvahiServiceToSyslog(AvahiService):
391
def rename(self):
392
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
398
return ret
399
400
401
def timedelta_to_milliseconds(td):
402
"Convert a datetime.timedelta() to milliseconds"
403
return ((td.days * 24 * 60 * 60 * 1000)
404
+ (td.seconds * 1000)
405
+ (td.microseconds // 1000))
406
407
408
class Client(object):
179
409
"""A representation of a client host served by this server.
410
180
411
Attributes:
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
412
approved: bool(); 'None' if not yet approved/disapproved
413
approval_delay: datetime.timedelta(); Time to wait for approval
414
approval_duration: datetime.timedelta(); Duration of one approval
415
checker: subprocess.Popen(); a running checker process used
416
to see if the client lives.
417
'None' if no process is running.
418
checker_callback_tag: a gobject event source tag, or None
419
checker_command: string; External command which is run to check
420
if client lives. %() expansions are done at
421
runtime with vars(self) as dict, so that for
422
instance %(name)s can be used in the command.
423
checker_initiator_tag: a gobject event source tag, or None
424
created: datetime.datetime(); (UTC) object creation
425
client_structure: Object describing what attributes a client has
426
and is used for storing the client at exit
427
current_checker_command: string; current running checker_command
428
disable_initiator_tag: a gobject event source tag, or None
429
enabled: bool()
183
430
fingerprint: string (40 or 32 hexadecimal digits); used to
184
431
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
432
host: string; available for use by the checker command
187
created: datetime.datetime(); (UTC) object creation
188
last_enabled: datetime.datetime(); (UTC)
189
enabled: bool()
433
interval: datetime.timedelta(); How often to start a new checker
434
last_approval_request: datetime.datetime(); (UTC) or None
190
435
last_checked_ok: datetime.datetime(); (UTC) or None
436
last_checker_status: integer between 0 and 255 reflecting exit
437
status of last checker. -1 reflects crashed
438
checker, -2 means no checker completed yet.
439
last_enabled: datetime.datetime(); (UTC) or None
440
name: string; from the config file, used in log messages and
441
D-Bus identifiers
442
secret: bytestring; sent verbatim (over TLS) to client
191
443
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
198
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
200
checker_callback_tag: - '' -
201
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
203
runtime with vars(self) as dict, so that for
204
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
444
until this client is disabled
445
extended_timeout: extra long timeout when secret has been sent
446
runtime_expansions: Allowed attributes for runtime expansion.
447
expires: datetime.datetime(); time (UTC) when a client will be
448
disabled, or None
449
server_settings: The server_settings dict from main()
207
450
"""
451
452
runtime_expansions = ("approval_delay", "approval_duration",
453
"created", "enabled", "expires",
454
"fingerprint", "host", "interval",
455
"last_approval_request", "last_checked_ok",
456
"last_enabled", "name", "timeout")
457
client_defaults = { "timeout": "PT5M",
458
"extended_timeout": "PT15M",
459
"interval": "PT2M",
460
"checker": "fping -q -- %%(host)s",
461
"host": "",
462
"approval_delay": "PT0S",
463
"approval_duration": "PT1S",
464
"approved_by_default": "True",
465
"enabled": "True",
466
}
467
208
468
def timeout_milliseconds(self):
209
469
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
470
return timedelta_to_milliseconds(self.timeout)
471
472
def extended_timeout_milliseconds(self):
473
"Return the 'extended_timeout' attribute in milliseconds"
474
return timedelta_to_milliseconds(self.extended_timeout)
213
475
214
476
def interval_milliseconds(self):
215
477
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
219
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
478
return timedelta_to_milliseconds(self.interval)
479
480
def approval_delay_milliseconds(self):
481
return timedelta_to_milliseconds(self.approval_delay)
482
483
@staticmethod
484
def config_parser(config):
485
"""Construct a new dict of client settings of this form:
486
{ client_name: {setting_name: value, ...}, ...}
487
with exceptions for any special settings as defined above.
488
NOTE: Must be a pure function. Must return the same result
489
value given the same arguments.
490
"""
491
settings = {}
492
for client_name in config.sections():
493
section = dict(config.items(client_name))
494
client = settings[client_name] = {}
495
496
client["host"] = section["host"]
497
# Reformat values from string types to Python types
498
client["approved_by_default"] = config.getboolean(
499
client_name, "approved_by_default")
500
client["enabled"] = config.getboolean(client_name,
501
"enabled")
502
503
client["fingerprint"] = (section["fingerprint"].upper()
504
.replace(" ", ""))
505
if "secret" in section:
506
client["secret"] = section["secret"].decode("base64")
507
elif "secfile" in section:
508
with open(os.path.expanduser(os.path.expandvars
509
(section["secfile"])),
510
"rb") as secfile:
511
client["secret"] = secfile.read()
512
else:
513
raise TypeError("No secret or secfile for section {0}"
514
.format(section))
515
client["timeout"] = string_to_delta(section["timeout"])
516
client["extended_timeout"] = string_to_delta(
517
section["extended_timeout"])
518
client["interval"] = string_to_delta(section["interval"])
519
client["approval_delay"] = string_to_delta(
520
section["approval_delay"])
521
client["approval_duration"] = string_to_delta(
522
section["approval_duration"])
523
client["checker_command"] = section["checker"]
524
client["last_approval_request"] = None
525
client["last_checked_ok"] = None
526
client["last_checker_status"] = -2
527
528
return settings
529
530
def __init__(self, settings, name = None, server_settings=None):
225
531
self.name = name
226
if config is None:
227
config = {}
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = use_dbus
230
if self.use_dbus:
231
self.dbus_object_path = (dbus.ObjectPath
232
("/Mandos/clients/"
233
+ self.name.replace(".", "_")))
234
dbus.service.Object.__init__(self, bus,
235
self.dbus_object_path)
532
if server_settings is None:
533
server_settings = {}
534
self.server_settings = server_settings
535
# adding all client settings
536
for setting, value in settings.iteritems():
537
setattr(self, setting, value)
538
539
if self.enabled:
540
if not hasattr(self, "last_enabled"):
541
self.last_enabled = datetime.datetime.utcnow()
542
if not hasattr(self, "expires"):
543
self.expires = (datetime.datetime.utcnow()
544
+ self.timeout)
545
else:
546
self.last_enabled = None
547
self.expires = None
548
549
logger.debug("Creating client %r", self.name)
236
550
# Uppercase and remove spaces from fingerprint for later
237
551
# comparison purposes with return value from the fingerprint()
238
552
# function
239
self.fingerprint = (config["fingerprint"].upper()
240
.replace(u" ", u""))
241
logger.debug(u" Fingerprint: %s", self.fingerprint)
242
if "secret" in config:
243
self.secret = config["secret"].decode(u"base64")
244
elif "secfile" in config:
245
with closing(open(os.path.expanduser
246
(os.path.expandvars
247
(config["secfile"])))) as secfile:
248
self.secret = secfile.read()
249
else:
250
raise TypeError(u"No secret or secfile for client %s"
251
% self.name)
252
self.host = config.get("host", "")
253
self.created = datetime.datetime.utcnow()
254
self.enabled = False
255
self.last_enabled = None
256
self.last_checked_ok = None
257
self.timeout = string_to_delta(config["timeout"])
258
self.interval = string_to_delta(config["interval"])
259
self.disable_hook = disable_hook
553
logger.debug(" Fingerprint: %s", self.fingerprint)
554
self.created = settings.get("created",
555
datetime.datetime.utcnow())
556
557
# attributes specific for this server instance
260
558
self.checker = None
261
559
self.checker_initiator_tag = None
262
560
self.disable_initiator_tag = None
263
561
self.checker_callback_tag = None
264
self.checker_command = config["checker"]
562
self.current_checker_command = None
563
self.approved = None
564
self.approvals_pending = 0
565
self.changedstate = (multiprocessing_manager
566
.Condition(multiprocessing_manager
567
.Lock()))
568
self.client_structure = [attr for attr in
569
self.__dict__.iterkeys()
570
if not attr.startswith("_")]
571
self.client_structure.append("client_structure")
572
573
for name, t in inspect.getmembers(type(self),
574
lambda obj:
575
isinstance(obj,
576
property)):
577
if not name.startswith("_"):
578
self.client_structure.append(name)
579
580
# Send notice to process children that client state has changed
581
def send_changedstate(self):
582
with self.changedstate:
583
self.changedstate.notify_all()
265
584
266
585
def enable(self):
267
586
"""Start this client's checker and timeout hooks"""
587
if getattr(self, "enabled", False):
588
# Already enabled
589
return
590
self.expires = datetime.datetime.utcnow() + self.timeout
591
self.enabled = True
268
592
self.last_enabled = datetime.datetime.utcnow()
593
self.init_checker()
594
self.send_changedstate()
595
596
def disable(self, quiet=True):
597
"""Disable this client."""
598
if not getattr(self, "enabled", False):
599
return False
600
if not quiet:
601
logger.info("Disabling client %s", self.name)
602
if getattr(self, "disable_initiator_tag", None) is not None:
603
gobject.source_remove(self.disable_initiator_tag)
604
self.disable_initiator_tag = None
605
self.expires = None
606
if getattr(self, "checker_initiator_tag", None) is not None:
607
gobject.source_remove(self.checker_initiator_tag)
608
self.checker_initiator_tag = None
609
self.stop_checker()
610
self.enabled = False
611
if not quiet:
612
self.send_changedstate()
613
# Do not run this again if called by a gobject.timeout_add
614
return False
615
616
def __del__(self):
617
self.disable()
618
619
def init_checker(self):
269
620
# Schedule a new checker to be started an 'interval' from now,
270
621
# and every interval from then on.
622
if self.checker_initiator_tag is not None:
623
gobject.source_remove(self.checker_initiator_tag)
271
624
self.checker_initiator_tag = (gobject.timeout_add
272
625
(self.interval_milliseconds(),
273
626
self.start_checker))
274
# Also start a new checker *right now*.
275
self.start_checker()
276
627
# Schedule a disable() when 'timeout' has passed
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
277
630
self.disable_initiator_tag = (gobject.timeout_add
278
631
(self.timeout_milliseconds(),
279
632
self.disable))
280
self.enabled = True
281
if self.use_dbus:
282
# Emit D-Bus signals
283
self.PropertyChanged(dbus.String(u"enabled"),
284
dbus.Boolean(True, variant_level=1))
285
self.PropertyChanged(dbus.String(u"last_enabled"),
286
(_datetime_to_dbus(self.last_enabled,
287
variant_level=1)))
288
289
def disable(self):
290
"""Disable this client."""
291
if not getattr(self, "enabled", False):
292
return False
293
logger.info(u"Disabling client %s", self.name)
294
if getattr(self, "disable_initiator_tag", False):
295
gobject.source_remove(self.disable_initiator_tag)
296
self.disable_initiator_tag = None
297
if getattr(self, "checker_initiator_tag", False):
298
gobject.source_remove(self.checker_initiator_tag)
299
self.checker_initiator_tag = None
300
self.stop_checker()
301
if self.disable_hook:
302
self.disable_hook(self)
303
self.enabled = False
304
if self.use_dbus:
305
# Emit D-Bus signal
306
self.PropertyChanged(dbus.String(u"enabled"),
307
dbus.Boolean(False, variant_level=1))
308
# Do not run this again if called by a gobject.timeout_add
309
return False
310
311
def __del__(self):
312
self.disable_hook = None
313
self.disable()
633
# Also start a new checker *right now*.
634
self.start_checker()
314
635
315
636
def checker_callback(self, pid, condition, command):
316
637
"""The checker has completed, so take appropriate actions."""
317
638
self.checker_callback_tag = None
318
639
self.checker = None
319
if self.use_dbus:
320
# Emit D-Bus signal
321
self.PropertyChanged(dbus.String(u"checker_running"),
322
dbus.Boolean(False, variant_level=1))
323
if (os.WIFEXITED(condition)
324
and (os.WEXITSTATUS(condition) == 0)):
325
logger.info(u"Checker for %(name)s succeeded",
326
vars(self))
327
if self.use_dbus:
328
# Emit D-Bus signal
329
self.CheckerCompleted(dbus.Boolean(True),
330
dbus.UInt16(condition),
331
dbus.String(command))
332
self.bump_timeout()
333
elif not os.WIFEXITED(condition):
334
logger.warning(u"Checker for %(name)s crashed?",
640
if os.WIFEXITED(condition):
641
self.last_checker_status = os.WEXITSTATUS(condition)
642
if self.last_checker_status == 0:
643
logger.info("Checker for %(name)s succeeded",
644
vars(self))
645
self.checked_ok()
646
else:
647
logger.info("Checker for %(name)s failed",
648
vars(self))
649
else:
650
self.last_checker_status = -1
651
logger.warning("Checker for %(name)s crashed?",
335
652
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Boolean(False),
339
dbus.UInt16(condition),
340
dbus.String(command))
341
else:
342
logger.info(u"Checker for %(name)s failed",
343
vars(self))
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Boolean(False),
347
dbus.UInt16(condition),
348
dbus.String(command))
349
653
350
def bump_timeout(self):
351
"""Bump up the timeout for this client.
352
This should only be called when the client has been seen,
353
alive and well.
354
"""
654
def checked_ok(self):
655
"""Assert that the client has been seen, alive and well."""
355
656
self.last_checked_ok = datetime.datetime.utcnow()
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
657
self.last_checker_status = 0
658
self.bump_timeout()
659
660
def bump_timeout(self, timeout=None):
661
"""Bump up the timeout for this client."""
662
if timeout is None:
663
timeout = self.timeout
664
if self.disable_initiator_tag is not None:
665
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
667
if getattr(self, "enabled", False):
668
self.disable_initiator_tag = (gobject.timeout_add
669
(timedelta_to_milliseconds
670
(timeout), self.disable))
671
self.expires = datetime.datetime.utcnow() + timeout
672
673
def need_approval(self):
674
self.last_approval_request = datetime.datetime.utcnow()
366
675
367
676
def start_checker(self):
368
677
"""Start a new checker subprocess if one is not running.
678
369
679
If a checker already exists, leave it running and do
370
680
nothing."""
371
681
# The reason for not killing a running checker is that if we
372
# did that, then if a checker (for some reason) started
373
# running slowly and taking more than 'interval' time, the
374
# client would inevitably timeout, since no checker would get
375
# a chance to run to completion. If we instead leave running
682
# did that, and if a checker (for some reason) started running
683
# slowly and taking more than 'interval' time, then the client
684
# would inevitably timeout, since no checker would get a
685
# chance to run to completion. If we instead leave running
376
686
# checkers alone, the checker would have to take more time
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
687
# than 'timeout' for the client to be disabled, which is as it
688
# should be.
689
690
# If a checker exists, make sure it is not a zombie
691
try:
692
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
except AttributeError:
694
pass
695
except OSError as error:
696
if error.errno != errno.ECHILD:
697
raise
698
else:
699
if pid:
700
logger.warning("Checker was a zombie")
701
gobject.source_remove(self.checker_callback_tag)
702
self.checker_callback(pid, status,
703
self.current_checker_command)
704
# Start a new checker if needed
379
705
if self.checker is None:
380
try:
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
383
except TypeError:
384
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
386
for key, val in
387
vars(self).iteritems())
388
try:
389
command = self.checker_command % escaped_attrs
390
except TypeError, error:
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
393
return True # Try again later
394
try:
395
logger.info(u"Starting checker %r for %s",
706
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
709
for attr in
710
self.runtime_expansions)
711
try:
712
command = self.checker_command % escaped_attrs
713
except TypeError as error:
714
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
717
self.current_checker_command = command
718
try:
719
logger.info("Starting checker %r for %s",
396
720
command, self.name)
397
721
# We don't need to redirect stdout and stderr, since
398
722
# in normal mode, that is already done by daemon(),
399
723
# and in debug mode we don't want to. (Stdin is
400
724
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
727
# created wnull.
728
popen_args = {}
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
732
"stderr": wnull })
401
733
self.checker = subprocess.Popen(command,
402
734
close_fds=True,
403
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
self.checker_callback_tag = (gobject.child_watch_add
411
(self.checker.pid,
412
self.checker_callback,
413
data=command))
414
except OSError, error:
415
logger.error(u"Failed to start subprocess: %s",
416
error)
735
shell=True, cwd="/",
736
**popen_args)
737
except OSError as error:
738
logger.error("Failed to start subprocess",
739
exc_info=error)
740
return True
741
self.checker_callback_tag = (gobject.child_watch_add
742
(self.checker.pid,
743
self.checker_callback,
744
data=command))
745
# The checker may have completed before the gobject
746
# watch was added. Check for this.
747
try:
748
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
749
except OSError as error:
750
if error.errno == errno.ECHILD:
751
# This should never happen
752
logger.error("Child process vanished",
753
exc_info=error)
754
return True
755
raise
756
if pid:
757
gobject.source_remove(self.checker_callback_tag)
758
self.checker_callback(pid, status, command)
417
759
# Re-run this periodically if run by gobject.timeout_add
418
760
return True
419
761
424
766
self.checker_callback_tag = None
425
767
if getattr(self, "checker", None) is None:
426
768
return
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
769
logger.debug("Stopping checker for %(name)s", vars(self))
428
770
try:
429
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
771
self.checker.terminate()
772
#time.sleep(0.5)
431
773
#if self.checker.poll() is None:
432
# os.kill(self.checker.pid, signal.SIGKILL)
433
except OSError, error:
774
# self.checker.kill()
775
except OSError as error:
434
776
if error.errno != errno.ESRCH: # No such process
435
777
raise
436
778
self.checker = None
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
def still_valid(self):
442
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
447
return now < (self.created + self.timeout)
448
else:
449
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"org.mandos_system.Mandos.Client"
453
454
# BumpTimeout - method
455
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
456
BumpTimeout.__name__ = "BumpTimeout"
779
780
781
def dbus_service_property(dbus_interface, signature="v",
782
access="readwrite", byte_arrays=False):
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
become properties on the D-Bus.
785
786
The decorated method will be called with no arguments by "Get"
787
and with one argument by "Set".
788
789
The parameters, where they are supported, are the same as
790
dbus.service.method, except there is only "signature", since the
791
type from Get() and the type sent to Set() is the same.
792
"""
793
# Encoding deeply encoded byte arrays is not supported yet by the
794
# "Set" method, so we fail early here:
795
if byte_arrays and signature != "ay":
796
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {0!r}".format(signature))
798
def decorator(func):
799
func._dbus_is_property = True
800
func._dbus_interface = dbus_interface
801
func._dbus_signature = signature
802
func._dbus_access = access
803
func._dbus_name = func.__name__
804
if func._dbus_name.endswith("_dbus_property"):
805
func._dbus_name = func._dbus_name[:-14]
806
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
807
return func
808
return decorator
809
810
811
def dbus_interface_annotations(dbus_interface):
812
"""Decorator for marking functions returning interface annotations
813
814
Usage:
815
816
@dbus_interface_annotations("org.example.Interface")
817
def _foo(self): # Function name does not matter
818
return {"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property.EmitsChangedSignal":
820
"false"}
821
"""
822
def decorator(func):
823
func._dbus_is_interface = True
824
func._dbus_interface = dbus_interface
825
func._dbus_name = dbus_interface
826
return func
827
return decorator
828
829
830
def dbus_annotations(annotations):
831
"""Decorator to annotate D-Bus methods, signals or properties
832
Usage:
833
834
@dbus_service_property("org.example.Interface", signature="b",
835
access="r")
836
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
837
"org.freedesktop.DBus.Property."
838
"EmitsChangedSignal": "false"})
839
def Property_dbus_property(self):
840
return dbus.Boolean(False)
841
"""
842
def decorator(func):
843
func._dbus_annotations = annotations
844
return func
845
return decorator
846
847
848
class DBusPropertyException(dbus.exceptions.DBusException):
849
"""A base class for D-Bus property-related exceptions
850
"""
851
def __unicode__(self):
852
return unicode(str(self))
853
854
855
class DBusPropertyAccessException(DBusPropertyException):
856
"""A property's access permissions disallows an operation.
857
"""
858
pass
859
860
861
class DBusPropertyNotFound(DBusPropertyException):
862
"""An attempt was made to access a non-existing property.
863
"""
864
pass
865
866
867
class DBusObjectWithProperties(dbus.service.Object):
868
"""A D-Bus object with properties.
869
870
Classes inheriting from this can use the dbus_service_property
871
decorator to expose methods as D-Bus properties. It exposes the
872
standard Get(), Set(), and GetAll() methods on the D-Bus.
873
"""
874
875
@staticmethod
876
def _is_dbus_thing(thing):
877
"""Returns a function testing if an attribute is a D-Bus thing
878
879
If called like _is_dbus_thing("method") it returns a function
880
suitable for use as predicate to inspect.getmembers().
881
"""
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
883
False)
884
885
def _get_all_dbus_things(self, thing):
886
"""Returns a generator of (name, attribute) pairs
887
"""
888
return ((getattr(athing.__get__(self), "_dbus_name",
889
name),
890
athing.__get__(self))
891
for cls in self.__class__.__mro__
892
for name, athing in
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
895
896
def _get_dbus_property(self, interface_name, property_name):
897
"""Returns a bound method if one exists which is a D-Bus
898
property with the specified name and interface.
899
"""
900
for cls in self.__class__.__mro__:
901
for name, value in (inspect.getmembers
902
(cls,
903
self._is_dbus_thing("property"))):
904
if (value._dbus_name == property_name
905
and value._dbus_interface == interface_name):
906
return value.__get__(self)
907
908
# No such property
909
raise DBusPropertyNotFound(self.dbus_object_path + ":"
910
+ interface_name + "."
911
+ property_name)
912
913
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
914
out_signature="v")
915
def Get(self, interface_name, property_name):
916
"""Standard D-Bus property Get() method, see D-Bus standard.
917
"""
918
prop = self._get_dbus_property(interface_name, property_name)
919
if prop._dbus_access == "write":
920
raise DBusPropertyAccessException(property_name)
921
value = prop()
922
if not hasattr(value, "variant_level"):
923
return value
924
return type(value)(value, variant_level=value.variant_level+1)
925
926
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
927
def Set(self, interface_name, property_name, value):
928
"""Standard D-Bus property Set() method, see D-Bus standard.
929
"""
930
prop = self._get_dbus_property(interface_name, property_name)
931
if prop._dbus_access == "read":
932
raise DBusPropertyAccessException(property_name)
933
if prop._dbus_get_args_options["byte_arrays"]:
934
# The byte_arrays option is not supported yet on
935
# signatures other than "ay".
936
if prop._dbus_signature != "ay":
937
raise ValueError("Byte arrays not supported for non-"
938
"'ay' signature {0!r}"
939
.format(prop._dbus_signature))
940
value = dbus.ByteArray(b''.join(chr(byte)
941
for byte in value))
942
prop(value)
943
944
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
945
out_signature="a{sv}")
946
def GetAll(self, interface_name):
947
"""Standard D-Bus property GetAll() method, see D-Bus
948
standard.
949
950
Note: Will not include properties with access="write".
951
"""
952
properties = {}
953
for name, prop in self._get_all_dbus_things("property"):
954
if (interface_name
955
and interface_name != prop._dbus_interface):
956
# Interface non-empty but did not match
957
continue
958
# Ignore write-only properties
959
if prop._dbus_access == "write":
960
continue
961
value = prop()
962
if not hasattr(value, "variant_level"):
963
properties[name] = value
964
continue
965
properties[name] = type(value)(value, variant_level=
966
value.variant_level+1)
967
return dbus.Dictionary(properties, signature="sv")
968
969
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
970
out_signature="s",
971
path_keyword='object_path',
972
connection_keyword='connection')
973
def Introspect(self, object_path, connection):
974
"""Overloading of standard D-Bus method.
975
976
Inserts property tags and interface annotation tags.
977
"""
978
xmlstring = dbus.service.Object.Introspect(self, object_path,
979
connection)
980
try:
981
document = xml.dom.minidom.parseString(xmlstring)
982
def make_tag(document, name, prop):
983
e = document.createElement("property")
984
e.setAttribute("name", name)
985
e.setAttribute("type", prop._dbus_signature)
986
e.setAttribute("access", prop._dbus_access)
987
return e
988
for if_tag in document.getElementsByTagName("interface"):
989
# Add property tags
990
for tag in (make_tag(document, name, prop)
991
for name, prop
992
in self._get_all_dbus_things("property")
993
if prop._dbus_interface
994
== if_tag.getAttribute("name")):
995
if_tag.appendChild(tag)
996
# Add annotation tags
997
for typ in ("method", "signal", "property"):
998
for tag in if_tag.getElementsByTagName(typ):
999
annots = dict()
1000
for name, prop in (self.
1001
_get_all_dbus_things(typ)):
1002
if (name == tag.getAttribute("name")
1003
and prop._dbus_interface
1004
== if_tag.getAttribute("name")):
1005
annots.update(getattr
1006
(prop,
1007
"_dbus_annotations",
1008
{}))
1009
for name, value in annots.iteritems():
1010
ann_tag = document.createElement(
1011
"annotation")
1012
ann_tag.setAttribute("name", name)
1013
ann_tag.setAttribute("value", value)
1014
tag.appendChild(ann_tag)
1015
# Add interface annotation tags
1016
for annotation, value in dict(
1017
itertools.chain.from_iterable(
1018
annotations().iteritems()
1019
for name, annotations in
1020
self._get_all_dbus_things("interface")
1021
if name == if_tag.getAttribute("name")
1022
)).iteritems():
1023
ann_tag = document.createElement("annotation")
1024
ann_tag.setAttribute("name", annotation)
1025
ann_tag.setAttribute("value", value)
1026
if_tag.appendChild(ann_tag)
1027
# Add the names to the return values for the
1028
# "org.freedesktop.DBus.Properties" methods
1029
if (if_tag.getAttribute("name")
1030
== "org.freedesktop.DBus.Properties"):
1031
for cn in if_tag.getElementsByTagName("method"):
1032
if cn.getAttribute("name") == "Get":
1033
for arg in cn.getElementsByTagName("arg"):
1034
if (arg.getAttribute("direction")
1035
== "out"):
1036
arg.setAttribute("name", "value")
1037
elif cn.getAttribute("name") == "GetAll":
1038
for arg in cn.getElementsByTagName("arg"):
1039
if (arg.getAttribute("direction")
1040
== "out"):
1041
arg.setAttribute("name", "props")
1042
xmlstring = document.toxml("utf-8")
1043
document.unlink()
1044
except (AttributeError, xml.dom.DOMException,
1045
xml.parsers.expat.ExpatError) as error:
1046
logger.error("Failed to override Introspection method",
1047
exc_info=error)
1048
return xmlstring
1049
1050
1051
def datetime_to_dbus(dt, variant_level=0):
1052
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1053
if dt is None:
1054
return dbus.String("", variant_level = variant_level)
1055
return dbus.String(dt.isoformat(),
1056
variant_level=variant_level)
1057
1058
1059
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1060
"""A class decorator; applied to a subclass of
1061
dbus.service.Object, it will add alternate D-Bus attributes with
1062
interface names according to the "alt_interface_names" mapping.
1063
Usage:
1064
1065
@alternate_dbus_interfaces({"org.example.Interface":
1066
"net.example.AlternateInterface"})
1067
class SampleDBusObject(dbus.service.Object):
1068
@dbus.service.method("org.example.Interface")
1069
def SampleDBusMethod():
1070
pass
1071
1072
The above "SampleDBusMethod" on "SampleDBusObject" will be
1073
reachable via two interfaces: "org.example.Interface" and
1074
"net.example.AlternateInterface", the latter of which will have
1075
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1076
"true", unless "deprecate" is passed with a False value.
1077
1078
This works for methods and signals, and also for D-Bus properties
1079
(from DBusObjectWithProperties) and interfaces (from the
1080
dbus_interface_annotations decorator).
1081
"""
1082
def wrapper(cls):
1083
for orig_interface_name, alt_interface_name in (
1084
alt_interface_names.iteritems()):
1085
attr = {}
1086
interface_names = set()
1087
# Go though all attributes of the class
1088
for attrname, attribute in inspect.getmembers(cls):
1089
# Ignore non-D-Bus attributes, and D-Bus attributes
1090
# with the wrong interface name
1091
if (not hasattr(attribute, "_dbus_interface")
1092
or not attribute._dbus_interface
1093
.startswith(orig_interface_name)):
1094
continue
1095
# Create an alternate D-Bus interface name based on
1096
# the current name
1097
alt_interface = (attribute._dbus_interface
1098
.replace(orig_interface_name,
1099
alt_interface_name))
1100
interface_names.add(alt_interface)
1101
# Is this a D-Bus signal?
1102
if getattr(attribute, "_dbus_is_signal", False):
1103
# Extract the original non-method undecorated
1104
# function by black magic
1105
nonmethod_func = (dict(
1106
zip(attribute.func_code.co_freevars,
1107
attribute.__closure__))["func"]
1108
.cell_contents)
1109
# Create a new, but exactly alike, function
1110
# object, and decorate it to be a new D-Bus signal
1111
# with the alternate D-Bus interface name
1112
new_function = (dbus.service.signal
1113
(alt_interface,
1114
attribute._dbus_signature)
1115
(types.FunctionType(
1116
nonmethod_func.func_code,
1117
nonmethod_func.func_globals,
1118
nonmethod_func.func_name,
1119
nonmethod_func.func_defaults,
1120
nonmethod_func.func_closure)))
1121
# Copy annotations, if any
1122
try:
1123
new_function._dbus_annotations = (
1124
dict(attribute._dbus_annotations))
1125
except AttributeError:
1126
pass
1127
# Define a creator of a function to call both the
1128
# original and alternate functions, so both the
1129
# original and alternate signals gets sent when
1130
# the function is called
1131
def fixscope(func1, func2):
1132
"""This function is a scope container to pass
1133
func1 and func2 to the "call_both" function
1134
outside of its arguments"""
1135
def call_both(*args, **kwargs):
1136
"""This function will emit two D-Bus
1137
signals by calling func1 and func2"""
1138
func1(*args, **kwargs)
1139
func2(*args, **kwargs)
1140
return call_both
1141
# Create the "call_both" function and add it to
1142
# the class
1143
attr[attrname] = fixscope(attribute, new_function)
1144
# Is this a D-Bus method?
1145
elif getattr(attribute, "_dbus_is_method", False):
1146
# Create a new, but exactly alike, function
1147
# object. Decorate it to be a new D-Bus method
1148
# with the alternate D-Bus interface name. Add it
1149
# to the class.
1150
attr[attrname] = (dbus.service.method
1151
(alt_interface,
1152
attribute._dbus_in_signature,
1153
attribute._dbus_out_signature)
1154
(types.FunctionType
1155
(attribute.func_code,
1156
attribute.func_globals,
1157
attribute.func_name,
1158
attribute.func_defaults,
1159
attribute.func_closure)))
1160
# Copy annotations, if any
1161
try:
1162
attr[attrname]._dbus_annotations = (
1163
dict(attribute._dbus_annotations))
1164
except AttributeError:
1165
pass
1166
# Is this a D-Bus property?
1167
elif getattr(attribute, "_dbus_is_property", False):
1168
# Create a new, but exactly alike, function
1169
# object, and decorate it to be a new D-Bus
1170
# property with the alternate D-Bus interface
1171
# name. Add it to the class.
1172
attr[attrname] = (dbus_service_property
1173
(alt_interface,
1174
attribute._dbus_signature,
1175
attribute._dbus_access,
1176
attribute
1177
._dbus_get_args_options
1178
["byte_arrays"])
1179
(types.FunctionType
1180
(attribute.func_code,
1181
attribute.func_globals,
1182
attribute.func_name,
1183
attribute.func_defaults,
1184
attribute.func_closure)))
1185
# Copy annotations, if any
1186
try:
1187
attr[attrname]._dbus_annotations = (
1188
dict(attribute._dbus_annotations))
1189
except AttributeError:
1190
pass
1191
# Is this a D-Bus interface?
1192
elif getattr(attribute, "_dbus_is_interface", False):
1193
# Create a new, but exactly alike, function
1194
# object. Decorate it to be a new D-Bus interface
1195
# with the alternate D-Bus interface name. Add it
1196
# to the class.
1197
attr[attrname] = (dbus_interface_annotations
1198
(alt_interface)
1199
(types.FunctionType
1200
(attribute.func_code,
1201
attribute.func_globals,
1202
attribute.func_name,
1203
attribute.func_defaults,
1204
attribute.func_closure)))
1205
if deprecate:
1206
# Deprecate all alternate interfaces
1207
iname="_AlternateDBusNames_interface_annotation{0}"
1208
for interface_name in interface_names:
1209
@dbus_interface_annotations(interface_name)
1210
def func(self):
1211
return { "org.freedesktop.DBus.Deprecated":
1212
"true" }
1213
# Find an unused name
1214
for aname in (iname.format(i)
1215
for i in itertools.count()):
1216
if aname not in attr:
1217
attr[aname] = func
1218
break
1219
if interface_names:
1220
# Replace the class with a new subclass of it with
1221
# methods, signals, etc. as created above.
1222
cls = type(b"{0}Alternate".format(cls.__name__),
1223
(cls,), attr)
1224
return cls
1225
return wrapper
1226
1227
1228
@alternate_dbus_interfaces({"se.recompile.Mandos":
1229
"se.bsnet.fukt.Mandos"})
1230
class ClientDBus(Client, DBusObjectWithProperties):
1231
"""A Client class using D-Bus
1232
1233
Attributes:
1234
dbus_object_path: dbus.ObjectPath
1235
bus: dbus.SystemBus()
1236
"""
1237
1238
runtime_expansions = (Client.runtime_expansions
1239
+ ("dbus_object_path",))
1240
1241
# dbus.service.Object doesn't use super(), so we can't either.
1242
1243
def __init__(self, bus = None, *args, **kwargs):
1244
self.bus = bus
1245
Client.__init__(self, *args, **kwargs)
1246
# Only now, when this client is initialized, can it show up on
1247
# the D-Bus
1248
client_object_name = unicode(self.name).translate(
1249
{ord("."): ord("_"),
1250
ord("-"): ord("_")})
1251
self.dbus_object_path = (dbus.ObjectPath
1252
("/clients/" + client_object_name))
1253
DBusObjectWithProperties.__init__(self, self.bus,
1254
self.dbus_object_path)
1255
1256
def notifychangeproperty(transform_func,
1257
dbus_name, type_func=lambda x: x,
1258
variant_level=1):
1259
""" Modify a variable so that it's a property which announces
1260
its changes to DBus.
1261
1262
transform_fun: Function that takes a value and a variant_level
1263
and transforms it to a D-Bus type.
1264
dbus_name: D-Bus name of the variable
1265
type_func: Function that transform the value before sending it
1266
to the D-Bus. Default: no transform
1267
variant_level: D-Bus variant level. Default: 1
1268
"""
1269
attrname = "_{0}".format(dbus_name)
1270
def setter(self, value):
1271
if hasattr(self, "dbus_object_path"):
1272
if (not hasattr(self, attrname) or
1273
type_func(getattr(self, attrname, None))
1274
!= type_func(value)):
1275
dbus_value = transform_func(type_func(value),
1276
variant_level
1277
=variant_level)
1278
self.PropertyChanged(dbus.String(dbus_name),
1279
dbus_value)
1280
setattr(self, attrname, value)
1281
1282
return property(lambda self: getattr(self, attrname), setter)
1283
1284
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1285
approvals_pending = notifychangeproperty(dbus.Boolean,
1286
"ApprovalPending",
1287
type_func = bool)
1288
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1289
last_enabled = notifychangeproperty(datetime_to_dbus,
1290
"LastEnabled")
1291
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1292
type_func = lambda checker:
1293
checker is not None)
1294
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1295
"LastCheckedOK")
1296
last_checker_status = notifychangeproperty(dbus.Int16,
1297
"LastCheckerStatus")
1298
last_approval_request = notifychangeproperty(
1299
datetime_to_dbus, "LastApprovalRequest")
1300
approved_by_default = notifychangeproperty(dbus.Boolean,
1301
"ApprovedByDefault")
1302
approval_delay = notifychangeproperty(dbus.UInt64,
1303
"ApprovalDelay",
1304
type_func =
1305
timedelta_to_milliseconds)
1306
approval_duration = notifychangeproperty(
1307
dbus.UInt64, "ApprovalDuration",
1308
type_func = timedelta_to_milliseconds)
1309
host = notifychangeproperty(dbus.String, "Host")
1310
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1311
type_func =
1312
timedelta_to_milliseconds)
1313
extended_timeout = notifychangeproperty(
1314
dbus.UInt64, "ExtendedTimeout",
1315
type_func = timedelta_to_milliseconds)
1316
interval = notifychangeproperty(dbus.UInt64,
1317
"Interval",
1318
type_func =
1319
timedelta_to_milliseconds)
1320
checker_command = notifychangeproperty(dbus.String, "Checker")
1321
1322
del notifychangeproperty
1323
1324
def __del__(self, *args, **kwargs):
1325
try:
1326
self.remove_from_connection()
1327
except LookupError:
1328
pass
1329
if hasattr(DBusObjectWithProperties, "__del__"):
1330
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1331
Client.__del__(self, *args, **kwargs)
1332
1333
def checker_callback(self, pid, condition, command,
1334
*args, **kwargs):
1335
self.checker_callback_tag = None
1336
self.checker = None
1337
if os.WIFEXITED(condition):
1338
exitstatus = os.WEXITSTATUS(condition)
1339
# Emit D-Bus signal
1340
self.CheckerCompleted(dbus.Int16(exitstatus),
1341
dbus.Int64(condition),
1342
dbus.String(command))
1343
else:
1344
# Emit D-Bus signal
1345
self.CheckerCompleted(dbus.Int16(-1),
1346
dbus.Int64(condition),
1347
dbus.String(command))
1348
1349
return Client.checker_callback(self, pid, condition, command,
1350
*args, **kwargs)
1351
1352
def start_checker(self, *args, **kwargs):
1353
old_checker = self.checker
1354
if self.checker is not None:
1355
old_checker_pid = self.checker.pid
1356
else:
1357
old_checker_pid = None
1358
r = Client.start_checker(self, *args, **kwargs)
1359
# Only if new checker process was started
1360
if (self.checker is not None
1361
and old_checker_pid != self.checker.pid):
1362
# Emit D-Bus signal
1363
self.CheckerStarted(self.current_checker_command)
1364
return r
1365
1366
def _reset_approved(self):
1367
self.approved = None
1368
return False
1369
1370
def approve(self, value=True):
1371
self.approved = value
1372
gobject.timeout_add(timedelta_to_milliseconds
1373
(self.approval_duration),
1374
self._reset_approved)
1375
self.send_changedstate()
1376
1377
## D-Bus methods, signals & properties
1378
_interface = "se.recompile.Mandos.Client"
1379
1380
## Interfaces
1381
1382
@dbus_interface_annotations(_interface)
1383
def _foo(self):
1384
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1385
"false"}
1386
1387
## Signals
457
1388
458
1389
# CheckerCompleted - signal
459
@dbus.service.signal(_interface, signature="bqs")
460
def CheckerCompleted(self, success, condition, command):
1390
@dbus.service.signal(_interface, signature="nxs")
1391
def CheckerCompleted(self, exitcode, waitstatus, command):
461
1392
"D-Bus signal"
462
1393
pass
463
1394
467
1398
"D-Bus signal"
468
1399
pass
469
1400
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
1401
# PropertyChanged - signal
518
1402
@dbus.service.signal(_interface, signature="sv")
519
1403
def PropertyChanged(self, property, value):
520
1404
"D-Bus signal"
521
1405
pass
522
1406
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
1407
# GotSecret - signal
1408
@dbus.service.signal(_interface)
1409
def GotSecret(self):
1410
"""D-Bus signal
1411
Is sent after a successful transfer of secret from the Mandos
1412
server to mandos-client
1413
"""
1414
pass
1415
1416
# Rejected - signal
1417
@dbus.service.signal(_interface, signature="s")
1418
def Rejected(self, reason):
1419
"D-Bus signal"
1420
pass
1421
1422
# NeedApproval - signal
1423
@dbus.service.signal(_interface, signature="tb")
1424
def NeedApproval(self, timeout, default):
1425
"D-Bus signal"
1426
return self.need_approval()
1427
1428
## Methods
1429
1430
# Approve - method
1431
@dbus.service.method(_interface, in_signature="b")
1432
def Approve(self, value):
1433
self.approve(value)
1434
1435
# CheckedOK - method
1436
@dbus.service.method(_interface)
1437
def CheckedOK(self):
1438
self.checked_ok()
566
1439
567
1440
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
1441
@dbus.service.method(_interface)
1442
def Enable(self):
1443
"D-Bus method"
1444
self.enable()
570
1445
571
1446
# StartChecker - method
572
1447
@dbus.service.method(_interface)
581
1456
self.disable()
582
1457
583
1458
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
1459
@dbus.service.method(_interface)
1460
def StopChecker(self):
1461
self.stop_checker()
1462
1463
## Properties
1464
1465
# ApprovalPending - property
1466
@dbus_service_property(_interface, signature="b", access="read")
1467
def ApprovalPending_dbus_property(self):
1468
return dbus.Boolean(bool(self.approvals_pending))
1469
1470
# ApprovedByDefault - property
1471
@dbus_service_property(_interface, signature="b",
1472
access="readwrite")
1473
def ApprovedByDefault_dbus_property(self, value=None):
1474
if value is None: # get
1475
return dbus.Boolean(self.approved_by_default)
1476
self.approved_by_default = bool(value)
1477
1478
# ApprovalDelay - property
1479
@dbus_service_property(_interface, signature="t",
1480
access="readwrite")
1481
def ApprovalDelay_dbus_property(self, value=None):
1482
if value is None: # get
1483
return dbus.UInt64(self.approval_delay_milliseconds())
1484
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1485
1486
# ApprovalDuration - property
1487
@dbus_service_property(_interface, signature="t",
1488
access="readwrite")
1489
def ApprovalDuration_dbus_property(self, value=None):
1490
if value is None: # get
1491
return dbus.UInt64(timedelta_to_milliseconds(
1492
self.approval_duration))
1493
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1494
1495
# Name - property
1496
@dbus_service_property(_interface, signature="s", access="read")
1497
def Name_dbus_property(self):
1498
return dbus.String(self.name)
1499
1500
# Fingerprint - property
1501
@dbus_service_property(_interface, signature="s", access="read")
1502
def Fingerprint_dbus_property(self):
1503
return dbus.String(self.fingerprint)
1504
1505
# Host - property
1506
@dbus_service_property(_interface, signature="s",
1507
access="readwrite")
1508
def Host_dbus_property(self, value=None):
1509
if value is None: # get
1510
return dbus.String(self.host)
1511
self.host = unicode(value)
1512
1513
# Created - property
1514
@dbus_service_property(_interface, signature="s", access="read")
1515
def Created_dbus_property(self):
1516
return datetime_to_dbus(self.created)
1517
1518
# LastEnabled - property
1519
@dbus_service_property(_interface, signature="s", access="read")
1520
def LastEnabled_dbus_property(self):
1521
return datetime_to_dbus(self.last_enabled)
1522
1523
# Enabled - property
1524
@dbus_service_property(_interface, signature="b",
1525
access="readwrite")
1526
def Enabled_dbus_property(self, value=None):
1527
if value is None: # get
1528
return dbus.Boolean(self.enabled)
1529
if value:
1530
self.enable()
1531
else:
1532
self.disable()
1533
1534
# LastCheckedOK - property
1535
@dbus_service_property(_interface, signature="s",
1536
access="readwrite")
1537
def LastCheckedOK_dbus_property(self, value=None):
1538
if value is not None:
1539
self.checked_ok()
1540
return
1541
return datetime_to_dbus(self.last_checked_ok)
1542
1543
# LastCheckerStatus - property
1544
@dbus_service_property(_interface, signature="n",
1545
access="read")
1546
def LastCheckerStatus_dbus_property(self):
1547
return dbus.Int16(self.last_checker_status)
1548
1549
# Expires - property
1550
@dbus_service_property(_interface, signature="s", access="read")
1551
def Expires_dbus_property(self):
1552
return datetime_to_dbus(self.expires)
1553
1554
# LastApprovalRequest - property
1555
@dbus_service_property(_interface, signature="s", access="read")
1556
def LastApprovalRequest_dbus_property(self):
1557
return datetime_to_dbus(self.last_approval_request)
1558
1559
# Timeout - property
1560
@dbus_service_property(_interface, signature="t",
1561
access="readwrite")
1562
def Timeout_dbus_property(self, value=None):
1563
if value is None: # get
1564
return dbus.UInt64(self.timeout_milliseconds())
1565
old_timeout = self.timeout
1566
self.timeout = datetime.timedelta(0, 0, 0, value)
1567
# Reschedule disabling
1568
if self.enabled:
1569
now = datetime.datetime.utcnow()
1570
self.expires += self.timeout - old_timeout
1571
if self.expires <= now:
1572
# The timeout has passed
1573
self.disable()
1574
else:
1575
if (getattr(self, "disable_initiator_tag", None)
1576
is None):
1577
return
1578
gobject.source_remove(self.disable_initiator_tag)
1579
self.disable_initiator_tag = (
1580
gobject.timeout_add(
1581
timedelta_to_milliseconds(self.expires - now),
1582
self.disable))
1583
1584
# ExtendedTimeout - property
1585
@dbus_service_property(_interface, signature="t",
1586
access="readwrite")
1587
def ExtendedTimeout_dbus_property(self, value=None):
1588
if value is None: # get
1589
return dbus.UInt64(self.extended_timeout_milliseconds())
1590
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1591
1592
# Interval - property
1593
@dbus_service_property(_interface, signature="t",
1594
access="readwrite")
1595
def Interval_dbus_property(self, value=None):
1596
if value is None: # get
1597
return dbus.UInt64(self.interval_milliseconds())
1598
self.interval = datetime.timedelta(0, 0, 0, value)
1599
if getattr(self, "checker_initiator_tag", None) is None:
1600
return
1601
if self.enabled:
1602
# Reschedule checker run
1603
gobject.source_remove(self.checker_initiator_tag)
1604
self.checker_initiator_tag = (gobject.timeout_add
1605
(value, self.start_checker))
1606
self.start_checker() # Start one now, too
1607
1608
# Checker - property
1609
@dbus_service_property(_interface, signature="s",
1610
access="readwrite")
1611
def Checker_dbus_property(self, value=None):
1612
if value is None: # get
1613
return dbus.String(self.checker_command)
1614
self.checker_command = unicode(value)
1615
1616
# CheckerRunning - property
1617
@dbus_service_property(_interface, signature="b",
1618
access="readwrite")
1619
def CheckerRunning_dbus_property(self, value=None):
1620
if value is None: # get
1621
return dbus.Boolean(self.checker is not None)
1622
if value:
1623
self.start_checker()
1624
else:
1625
self.stop_checker()
1626
1627
# ObjectPath - property
1628
@dbus_service_property(_interface, signature="o", access="read")
1629
def ObjectPath_dbus_property(self):
1630
return self.dbus_object_path # is already a dbus.ObjectPath
1631
1632
# Secret = property
1633
@dbus_service_property(_interface, signature="ay",
1634
access="write", byte_arrays=True)
1635
def Secret_dbus_property(self, value):
1636
self.secret = str(value)
586
1637
587
1638
del _interface
588
1639
589
1640
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
596
# ...do the normal thing
597
return session.peer_certificate
598
list_size = ctypes.c_uint()
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if list_size.value == 0:
603
return None
604
cert = cert_list[0]
605
return ctypes.string_at(cert.data, cert.size)
606
607
608
def fingerprint(openpgp):
609
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
610
# New GnuTLS "datum" with the OpenPGP public key
611
datum = (gnutls.library.types
612
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
613
ctypes.POINTER
614
(ctypes.c_ubyte)),
615
ctypes.c_uint(len(openpgp))))
616
# New empty GnuTLS certificate
617
crt = gnutls.library.types.gnutls_openpgp_crt_t()
618
(gnutls.library.functions
619
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
620
# Import the OpenPGP public key into the certificate
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
623
gnutls.library.constants
624
.GNUTLS_OPENPGP_FMT_RAW))
625
# Verify the self signature in the key
626
crtverify = ctypes.c_uint()
627
(gnutls.library.functions
628
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
629
if crtverify.value != 0:
630
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
631
raise gnutls.errors.CertificateSecurityError("Verify failed")
632
# New buffer for the fingerprint
633
buf = ctypes.create_string_buffer(20)
634
buf_len = ctypes.c_size_t()
635
# Get the fingerprint from the certificate into the buffer
636
(gnutls.library.functions
637
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
638
ctypes.byref(buf_len)))
639
# Deinit the certificate
640
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
# Convert the buffer to a Python bytestring
642
fpr = ctypes.string_at(buf, buf_len.value)
643
# Convert the bytestring to hexadecimal notation
644
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
645
return hex_fpr
646
647
648
class TCP_handler(SocketServer.BaseRequestHandler, object):
649
"""A TCP request handler class.
650
Instantiated by IPv6_TCPServer for each request to handle it.
1641
class ProxyClient(object):
1642
def __init__(self, child_pipe, fpr, address):
1643
self._pipe = child_pipe
1644
self._pipe.send(('init', fpr, address))
1645
if not self._pipe.recv():
1646
raise KeyError()
1647
1648
def __getattribute__(self, name):
1649
if name == '_pipe':
1650
return super(ProxyClient, self).__getattribute__(name)
1651
self._pipe.send(('getattr', name))
1652
data = self._pipe.recv()
1653
if data[0] == 'data':
1654
return data[1]
1655
if data[0] == 'function':
1656
def func(*args, **kwargs):
1657
self._pipe.send(('funcall', name, args, kwargs))
1658
return self._pipe.recv()[1]
1659
return func
1660
1661
def __setattr__(self, name, value):
1662
if name == '_pipe':
1663
return super(ProxyClient, self).__setattr__(name, value)
1664
self._pipe.send(('setattr', name, value))
1665
1666
1667
class ClientHandler(socketserver.BaseRequestHandler, object):
1668
"""A class to handle client connections.
1669
1670
Instantiated once for each connection to handle it.
651
1671
Note: This will run in its own forked process."""
652
1672
653
1673
def handle(self):
654
logger.info(u"TCP connection from: %s",
655
unicode(self.client_address))
656
session = (gnutls.connection
657
.ClientSession(self.request,
658
gnutls.connection
659
.X509Credentials()))
660
661
line = self.request.makefile().readline()
662
logger.debug(u"Protocol version: %r", line)
663
try:
664
if int(line.strip().split()[0]) > 1:
665
raise RuntimeError
666
except (ValueError, IndexError, RuntimeError), error:
667
logger.error(u"Unknown protocol version: %s", error)
668
return
669
670
# Note: gnutls.connection.X509Credentials is really a generic
671
# GnuTLS certificate credentials object so long as no X.509
672
# keys are added to it. Therefore, we can use it here despite
673
# using OpenPGP certificates.
674
675
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
676
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
677
# "+DHE-DSS"))
678
# Use a fallback default, since this MUST be set.
679
priority = self.server.settings.get("priority", "NORMAL")
680
(gnutls.library.functions
681
.gnutls_priority_set_direct(session._c_object,
682
priority, None))
683
684
try:
685
session.handshake()
686
except gnutls.errors.GNUTLSError, error:
687
logger.warning(u"Handshake failed: %s", error)
688
# Do not run session.bye() here: the session is not
689
# established. Just abandon the request.
690
return
691
try:
692
fpr = fingerprint(peer_certificate(session))
693
except (TypeError, gnutls.errors.GNUTLSError), error:
694
logger.warning(u"Bad certificate: %s", error)
695
session.bye()
696
return
697
logger.debug(u"Fingerprint: %s", fpr)
698
for c in self.server.clients:
699
if c.fingerprint == fpr:
700
client = c
701
break
702
else:
703
logger.warning(u"Client not found for fingerprint: %s",
704
fpr)
705
session.bye()
706
return
707
# Have to check if client.still_valid(), since it is possible
708
# that the client timed out while establishing the GnuTLS
709
# session.
710
if not client.still_valid():
711
logger.warning(u"Client %(name)s is invalid",
712
vars(client))
713
session.bye()
714
return
715
## This won't work here, since we're in a fork.
716
# client.bump_timeout()
717
sent_size = 0
718
while sent_size < len(client.secret):
719
sent = session.send(client.secret[sent_size:])
720
logger.debug(u"Sent: %d, remaining: %d",
721
sent, len(client.secret)
722
- (sent_size + sent))
723
sent_size += sent
724
session.bye()
725
726
727
class IPv6_TCPServer(SocketServer.ForkingMixIn,
728
SocketServer.TCPServer, object):
729
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1674
with contextlib.closing(self.server.child_pipe) as child_pipe:
1675
logger.info("TCP connection from: %s",
1676
unicode(self.client_address))
1677
logger.debug("Pipe FD: %d",
1678
self.server.child_pipe.fileno())
1679
1680
session = (gnutls.connection
1681
.ClientSession(self.request,
1682
gnutls.connection
1683
.X509Credentials()))
1684
1685
# Note: gnutls.connection.X509Credentials is really a
1686
# generic GnuTLS certificate credentials object so long as
1687
# no X.509 keys are added to it. Therefore, we can use it
1688
# here despite using OpenPGP certificates.
1689
1690
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1691
# "+AES-256-CBC", "+SHA1",
1692
# "+COMP-NULL", "+CTYPE-OPENPGP",
1693
# "+DHE-DSS"))
1694
# Use a fallback default, since this MUST be set.
1695
priority = self.server.gnutls_priority
1696
if priority is None:
1697
priority = "NORMAL"
1698
(gnutls.library.functions
1699
.gnutls_priority_set_direct(session._c_object,
1700
priority, None))
1701
1702
# Start communication using the Mandos protocol
1703
# Get protocol number
1704
line = self.request.makefile().readline()
1705
logger.debug("Protocol version: %r", line)
1706
try:
1707
if int(line.strip().split()[0]) > 1:
1708
raise RuntimeError(line)
1709
except (ValueError, IndexError, RuntimeError) as error:
1710
logger.error("Unknown protocol version: %s", error)
1711
return
1712
1713
# Start GnuTLS connection
1714
try:
1715
session.handshake()
1716
except gnutls.errors.GNUTLSError as error:
1717
logger.warning("Handshake failed: %s", error)
1718
# Do not run session.bye() here: the session is not
1719
# established. Just abandon the request.
1720
return
1721
logger.debug("Handshake succeeded")
1722
1723
approval_required = False
1724
try:
1725
try:
1726
fpr = self.fingerprint(self.peer_certificate
1727
(session))
1728
except (TypeError,
1729
gnutls.errors.GNUTLSError) as error:
1730
logger.warning("Bad certificate: %s", error)
1731
return
1732
logger.debug("Fingerprint: %s", fpr)
1733
1734
try:
1735
client = ProxyClient(child_pipe, fpr,
1736
self.client_address)
1737
except KeyError:
1738
return
1739
1740
if client.approval_delay:
1741
delay = client.approval_delay
1742
client.approvals_pending += 1
1743
approval_required = True
1744
1745
while True:
1746
if not client.enabled:
1747
logger.info("Client %s is disabled",
1748
client.name)
1749
if self.server.use_dbus:
1750
# Emit D-Bus signal
1751
client.Rejected("Disabled")
1752
return
1753
1754
if client.approved or not client.approval_delay:
1755
#We are approved or approval is disabled
1756
break
1757
elif client.approved is None:
1758
logger.info("Client %s needs approval",
1759
client.name)
1760
if self.server.use_dbus:
1761
# Emit D-Bus signal
1762
client.NeedApproval(
1763
client.approval_delay_milliseconds(),
1764
client.approved_by_default)
1765
else:
1766
logger.warning("Client %s was not approved",
1767
client.name)
1768
if self.server.use_dbus:
1769
# Emit D-Bus signal
1770
client.Rejected("Denied")
1771
return
1772
1773
#wait until timeout or approved
1774
time = datetime.datetime.now()
1775
client.changedstate.acquire()
1776
client.changedstate.wait(
1777
float(timedelta_to_milliseconds(delay)
1778
/ 1000))
1779
client.changedstate.release()
1780
time2 = datetime.datetime.now()
1781
if (time2 - time) >= delay:
1782
if not client.approved_by_default:
1783
logger.warning("Client %s timed out while"
1784
" waiting for approval",
1785
client.name)
1786
if self.server.use_dbus:
1787
# Emit D-Bus signal
1788
client.Rejected("Approval timed out")
1789
return
1790
else:
1791
break
1792
else:
1793
delay -= time2 - time
1794
1795
sent_size = 0
1796
while sent_size < len(client.secret):
1797
try:
1798
sent = session.send(client.secret[sent_size:])
1799
except gnutls.errors.GNUTLSError as error:
1800
logger.warning("gnutls send failed",
1801
exc_info=error)
1802
return
1803
logger.debug("Sent: %d, remaining: %d",
1804
sent, len(client.secret)
1805
- (sent_size + sent))
1806
sent_size += sent
1807
1808
logger.info("Sending secret to %s", client.name)
1809
# bump the timeout using extended_timeout
1810
client.bump_timeout(client.extended_timeout)
1811
if self.server.use_dbus:
1812
# Emit D-Bus signal
1813
client.GotSecret()
1814
1815
finally:
1816
if approval_required:
1817
client.approvals_pending -= 1
1818
try:
1819
session.bye()
1820
except gnutls.errors.GNUTLSError as error:
1821
logger.warning("GnuTLS bye failed",
1822
exc_info=error)
1823
1824
@staticmethod
1825
def peer_certificate(session):
1826
"Return the peer's OpenPGP certificate as a bytestring"
1827
# If not an OpenPGP certificate...
1828
if (gnutls.library.functions
1829
.gnutls_certificate_type_get(session._c_object)
1830
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1831
# ...do the normal thing
1832
return session.peer_certificate
1833
list_size = ctypes.c_uint(1)
1834
cert_list = (gnutls.library.functions
1835
.gnutls_certificate_get_peers
1836
(session._c_object, ctypes.byref(list_size)))
1837
if not bool(cert_list) and list_size.value != 0:
1838
raise gnutls.errors.GNUTLSError("error getting peer"
1839
" certificate")
1840
if list_size.value == 0:
1841
return None
1842
cert = cert_list[0]
1843
return ctypes.string_at(cert.data, cert.size)
1844
1845
@staticmethod
1846
def fingerprint(openpgp):
1847
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1848
# New GnuTLS "datum" with the OpenPGP public key
1849
datum = (gnutls.library.types
1850
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1851
ctypes.POINTER
1852
(ctypes.c_ubyte)),
1853
ctypes.c_uint(len(openpgp))))
1854
# New empty GnuTLS certificate
1855
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1856
(gnutls.library.functions
1857
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1858
# Import the OpenPGP public key into the certificate
1859
(gnutls.library.functions
1860
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1861
gnutls.library.constants
1862
.GNUTLS_OPENPGP_FMT_RAW))
1863
# Verify the self signature in the key
1864
crtverify = ctypes.c_uint()
1865
(gnutls.library.functions
1866
.gnutls_openpgp_crt_verify_self(crt, 0,
1867
ctypes.byref(crtverify)))
1868
if crtverify.value != 0:
1869
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1870
raise (gnutls.errors.CertificateSecurityError
1871
("Verify failed"))
1872
# New buffer for the fingerprint
1873
buf = ctypes.create_string_buffer(20)
1874
buf_len = ctypes.c_size_t()
1875
# Get the fingerprint from the certificate into the buffer
1876
(gnutls.library.functions
1877
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1878
ctypes.byref(buf_len)))
1879
# Deinit the certificate
1880
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1881
# Convert the buffer to a Python bytestring
1882
fpr = ctypes.string_at(buf, buf_len.value)
1883
# Convert the bytestring to hexadecimal notation
1884
hex_fpr = binascii.hexlify(fpr).upper()
1885
return hex_fpr
1886
1887
1888
class MultiprocessingMixIn(object):
1889
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1890
def sub_process_main(self, request, address):
1891
try:
1892
self.finish_request(request, address)
1893
except Exception:
1894
self.handle_error(request, address)
1895
self.close_request(request)
1896
1897
def process_request(self, request, address):
1898
"""Start a new process to process the request."""
1899
proc = multiprocessing.Process(target = self.sub_process_main,
1900
args = (request, address))
1901
proc.start()
1902
return proc
1903
1904
1905
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1906
""" adds a pipe to the MixIn """
1907
def process_request(self, request, client_address):
1908
"""Overrides and wraps the original process_request().
1909
1910
This function creates a new pipe in self.pipe
1911
"""
1912
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1913
1914
proc = MultiprocessingMixIn.process_request(self, request,
1915
client_address)
1916
self.child_pipe.close()
1917
self.add_pipe(parent_pipe, proc)
1918
1919
def add_pipe(self, parent_pipe, proc):
1920
"""Dummy function; override as necessary"""
1921
raise NotImplementedError()
1922
1923
1924
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1925
socketserver.TCPServer, object):
1926
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1927
730
1928
Attributes:
731
settings: Server settings
732
clients: Set() of Client objects
733
1929
enabled: Boolean; whether this server is activated yet
1930
interface: None or a network interface name (string)
1931
use_ipv6: Boolean; to use IPv6 or not
734
1932
"""
735
address_family = socket.AF_INET6
736
def __init__(self, *args, **kwargs):
737
if "settings" in kwargs:
738
self.settings = kwargs["settings"]
739
del kwargs["settings"]
740
if "clients" in kwargs:
741
self.clients = kwargs["clients"]
742
del kwargs["clients"]
743
self.enabled = False
744
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1933
def __init__(self, server_address, RequestHandlerClass,
1934
interface=None, use_ipv6=True, socketfd=None):
1935
"""If socketfd is set, use that file descriptor instead of
1936
creating a new one with socket.socket().
1937
"""
1938
self.interface = interface
1939
if use_ipv6:
1940
self.address_family = socket.AF_INET6
1941
if socketfd is not None:
1942
# Save the file descriptor
1943
self.socketfd = socketfd
1944
# Save the original socket.socket() function
1945
self.socket_socket = socket.socket
1946
# To implement --socket, we monkey patch socket.socket.
1947
#
1948
# (When socketserver.TCPServer is a new-style class, we
1949
# could make self.socket into a property instead of monkey
1950
# patching socket.socket.)
1951
#
1952
# Create a one-time-only replacement for socket.socket()
1953
@functools.wraps(socket.socket)
1954
def socket_wrapper(*args, **kwargs):
1955
# Restore original function so subsequent calls are
1956
# not affected.
1957
socket.socket = self.socket_socket
1958
del self.socket_socket
1959
# This time only, return a new socket object from the
1960
# saved file descriptor.
1961
return socket.fromfd(self.socketfd, *args, **kwargs)
1962
# Replace socket.socket() function with wrapper
1963
socket.socket = socket_wrapper
1964
# The socketserver.TCPServer.__init__ will call
1965
# socket.socket(), which might be our replacement,
1966
# socket_wrapper(), if socketfd was set.
1967
socketserver.TCPServer.__init__(self, server_address,
1968
RequestHandlerClass)
1969
745
1970
def server_bind(self):
746
1971
"""This overrides the normal server_bind() function
747
1972
to bind to an interface if one was specified, and also NOT to
748
1973
bind to an address or port if they were not specified."""
749
if self.settings["interface"]:
750
# 25 is from /usr/include/asm-i486/socket.h
751
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
752
try:
753
self.socket.setsockopt(socket.SOL_SOCKET,
754
SO_BINDTODEVICE,
755
self.settings["interface"])
756
except socket.error, error:
757
if error[0] == errno.EPERM:
758
logger.error(u"No permission to"
759
u" bind to interface %s",
760
self.settings["interface"])
761
else:
762
raise error
1974
if self.interface is not None:
1975
if SO_BINDTODEVICE is None:
1976
logger.error("SO_BINDTODEVICE does not exist;"
1977
" cannot bind to interface %s",
1978
self.interface)
1979
else:
1980
try:
1981
self.socket.setsockopt(socket.SOL_SOCKET,
1982
SO_BINDTODEVICE,
1983
str(self.interface + '\0'))
1984
except socket.error as error:
1985
if error.errno == errno.EPERM:
1986
logger.error("No permission to bind to"
1987
" interface %s", self.interface)
1988
elif error.errno == errno.ENOPROTOOPT:
1989
logger.error("SO_BINDTODEVICE not available;"
1990
" cannot bind to interface %s",
1991
self.interface)
1992
elif error.errno == errno.ENODEV:
1993
logger.error("Interface %s does not exist,"
1994
" cannot bind", self.interface)
1995
else:
1996
raise
763
1997
# Only bind(2) the socket if we really need to.
764
1998
if self.server_address[0] or self.server_address[1]:
765
1999
if not self.server_address[0]:
766
in6addr_any = "::"
767
self.server_address = (in6addr_any,
2000
if self.address_family == socket.AF_INET6:
2001
any_address = "::" # in6addr_any
2002
else:
2003
any_address = "0.0.0.0" # INADDR_ANY
2004
self.server_address = (any_address,
768
2005
self.server_address[1])
769
2006
elif not self.server_address[1]:
770
2007
self.server_address = (self.server_address[0],
771
2008
0)
772
# if self.settings["interface"]:
2009
# if self.interface:
773
2010
# self.server_address = (self.server_address[0],
774
2011
# 0, # port
775
2012
# 0, # flowinfo
776
2013
# if_nametoindex
777
# (self.settings
778
# ["interface"]))
779
return super(IPv6_TCPServer, self).server_bind()
2014
# (self.interface))
2015
return socketserver.TCPServer.server_bind(self)
2016
2017
2018
class MandosServer(IPv6_TCPServer):
2019
"""Mandos server.
2020
2021
Attributes:
2022
clients: set of Client objects
2023
gnutls_priority GnuTLS priority string
2024
use_dbus: Boolean; to emit D-Bus signals or not
2025
2026
Assumes a gobject.MainLoop event loop.
2027
"""
2028
def __init__(self, server_address, RequestHandlerClass,
2029
interface=None, use_ipv6=True, clients=None,
2030
gnutls_priority=None, use_dbus=True, socketfd=None):
2031
self.enabled = False
2032
self.clients = clients
2033
if self.clients is None:
2034
self.clients = {}
2035
self.use_dbus = use_dbus
2036
self.gnutls_priority = gnutls_priority
2037
IPv6_TCPServer.__init__(self, server_address,
2038
RequestHandlerClass,
2039
interface = interface,
2040
use_ipv6 = use_ipv6,
2041
socketfd = socketfd)
780
2042
def server_activate(self):
781
2043
if self.enabled:
782
return super(IPv6_TCPServer, self).server_activate()
2044
return socketserver.TCPServer.server_activate(self)
2045
783
2046
def enable(self):
784
2047
self.enabled = True
2048
2049
def add_pipe(self, parent_pipe, proc):
2050
# Call "handle_ipc" for both data and EOF events
2051
gobject.io_add_watch(parent_pipe.fileno(),
2052
gobject.IO_IN | gobject.IO_HUP,
2053
functools.partial(self.handle_ipc,
2054
parent_pipe =
2055
parent_pipe,
2056
proc = proc))
2057
2058
def handle_ipc(self, source, condition, parent_pipe=None,
2059
proc = None, client_object=None):
2060
# error, or the other end of multiprocessing.Pipe has closed
2061
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2062
# Wait for other process to exit
2063
proc.join()
2064
return False
2065
2066
# Read a request from the child
2067
request = parent_pipe.recv()
2068
command = request[0]
2069
2070
if command == 'init':
2071
fpr = request[1]
2072
address = request[2]
2073
2074
for c in self.clients.itervalues():
2075
if c.fingerprint == fpr:
2076
client = c
2077
break
2078
else:
2079
logger.info("Client not found for fingerprint: %s, ad"
2080
"dress: %s", fpr, address)
2081
if self.use_dbus:
2082
# Emit D-Bus signal
2083
mandos_dbus_service.ClientNotFound(fpr,
2084
address[0])
2085
parent_pipe.send(False)
2086
return False
2087
2088
gobject.io_add_watch(parent_pipe.fileno(),
2089
gobject.IO_IN | gobject.IO_HUP,
2090
functools.partial(self.handle_ipc,
2091
parent_pipe =
2092
parent_pipe,
2093
proc = proc,
2094
client_object =
2095
client))
2096
parent_pipe.send(True)
2097
# remove the old hook in favor of the new above hook on
2098
# same fileno
2099
return False
2100
if command == 'funcall':
2101
funcname = request[1]
2102
args = request[2]
2103
kwargs = request[3]
2104
2105
parent_pipe.send(('data', getattr(client_object,
2106
funcname)(*args,
2107
**kwargs)))
2108
2109
if command == 'getattr':
2110
attrname = request[1]
2111
if callable(client_object.__getattribute__(attrname)):
2112
parent_pipe.send(('function',))
2113
else:
2114
parent_pipe.send(('data', client_object
2115
.__getattribute__(attrname)))
2116
2117
if command == 'setattr':
2118
attrname = request[1]
2119
value = request[2]
2120
setattr(client_object, attrname, value)
2121
2122
return True
2123
2124
2125
def rfc3339_duration_to_delta(duration):
2126
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2127
2128
>>> rfc3339_duration_to_delta("P7D")
2129
datetime.timedelta(7)
2130
>>> rfc3339_duration_to_delta("PT60S")
2131
datetime.timedelta(0, 60)
2132
>>> rfc3339_duration_to_delta("PT60M")
2133
datetime.timedelta(0, 3600)
2134
>>> rfc3339_duration_to_delta("PT24H")
2135
datetime.timedelta(1)
2136
>>> rfc3339_duration_to_delta("P1W")
2137
datetime.timedelta(7)
2138
>>> rfc3339_duration_to_delta("PT5M30S")
2139
datetime.timedelta(0, 330)
2140
>>> rfc3339_duration_to_delta("P1DT3M20S")
2141
datetime.timedelta(1, 200)
2142
"""
2143
2144
# Parsing an RFC 3339 duration with regular expressions is not
2145
# possible - there would have to be multiple places for the same
2146
# values, like seconds. The current code, while more esoteric, is
2147
# cleaner without depending on a parsing library. If Python had a
2148
# built-in library for parsing we would use it, but we'd like to
2149
# avoid excessive use of external libraries.
2150
2151
# New type for defining tokens, syntax, and semantics all-in-one
2152
Token = collections.namedtuple("Token",
2153
("regexp", # To match token; if
2154
# "value" is not None,
2155
# must have a "group"
2156
# containing digits
2157
"value", # datetime.timedelta or
2158
# None
2159
"followers")) # Tokens valid after
2160
# this token
2161
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2162
# the "duration" ABNF definition in RFC 3339, Appendix A.
2163
token_end = Token(re.compile(r"$"), None, frozenset())
2164
token_second = Token(re.compile(r"(\d+)S"),
2165
datetime.timedelta(seconds=1),
2166
frozenset((token_end,)))
2167
token_minute = Token(re.compile(r"(\d+)M"),
2168
datetime.timedelta(minutes=1),
2169
frozenset((token_second, token_end)))
2170
token_hour = Token(re.compile(r"(\d+)H"),
2171
datetime.timedelta(hours=1),
2172
frozenset((token_minute, token_end)))
2173
token_time = Token(re.compile(r"T"),
2174
None,
2175
frozenset((token_hour, token_minute,
2176
token_second)))
2177
token_day = Token(re.compile(r"(\d+)D"),
2178
datetime.timedelta(days=1),
2179
frozenset((token_time, token_end)))
2180
token_month = Token(re.compile(r"(\d+)M"),
2181
datetime.timedelta(weeks=4),
2182
frozenset((token_day, token_end)))
2183
token_year = Token(re.compile(r"(\d+)Y"),
2184
datetime.timedelta(weeks=52),
2185
frozenset((token_month, token_end)))
2186
token_week = Token(re.compile(r"(\d+)W"),
2187
datetime.timedelta(weeks=1),
2188
frozenset((token_end,)))
2189
token_duration = Token(re.compile(r"P"), None,
2190
frozenset((token_year, token_month,
2191
token_day, token_time,
2192
token_week))),
2193
# Define starting values
2194
value = datetime.timedelta() # Value so far
2195
found_token = None
2196
followers = frozenset(token_duration,) # Following valid tokens
2197
s = duration # String left to parse
2198
# Loop until end token is found
2199
while found_token is not token_end:
2200
# Search for any currently valid tokens
2201
for token in followers:
2202
match = token.regexp.match(s)
2203
if match is not None:
2204
# Token found
2205
if token.value is not None:
2206
# Value found, parse digits
2207
factor = int(match.group(1), 10)
2208
# Add to value so far
2209
value += factor * token.value
2210
# Strip token from string
2211
s = token.regexp.sub("", s, 1)
2212
# Go to found token
2213
found_token = token
2214
# Set valid next tokens
2215
followers = found_token.followers
2216
break
2217
else:
2218
# No currently valid tokens were found
2219
raise ValueError("Invalid RFC 3339 duration")
2220
# End token found
2221
return value
785
2222
786
2223
787
2224
def string_to_delta(interval):
788
2225
"""Parse a string and return a datetime.timedelta
789
2226
790
2227
>>> string_to_delta('7d')
791
2228
datetime.timedelta(7)
792
2229
>>> string_to_delta('60s')
795
2232
datetime.timedelta(0, 3600)
796
2233
>>> string_to_delta('24h')
797
2234
datetime.timedelta(1)
798
>>> string_to_delta(u'1w')
2235
>>> string_to_delta('1w')
799
2236
datetime.timedelta(7)
800
2237
>>> string_to_delta('5m 30s')
801
2238
datetime.timedelta(0, 330)
802
2239
"""
2240
2241
try:
2242
return rfc3339_duration_to_delta(interval)
2243
except ValueError:
2244
pass
2245
803
2246
timevalue = datetime.timedelta(0)
804
2247
for s in interval.split():
805
2248
try:
806
2249
suffix = unicode(s[-1])
807
2250
value = int(s[:-1])
808
if suffix == u"d":
2251
if suffix == "d":
809
2252
delta = datetime.timedelta(value)
810
elif suffix == u"s":
2253
elif suffix == "s":
811
2254
delta = datetime.timedelta(0, value)
812
elif suffix == u"m":
2255
elif suffix == "m":
813
2256
delta = datetime.timedelta(0, 0, 0, 0, value)
814
elif suffix == u"h":
2257
elif suffix == "h":
815
2258
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
816
elif suffix == u"w":
2259
elif suffix == "w":
817
2260
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
818
2261
else:
819
raise ValueError
820
except (ValueError, IndexError):
821
raise ValueError
2262
raise ValueError("Unknown suffix {0!r}"
2263
.format(suffix))
2264
except IndexError as e:
2265
raise ValueError(*(e.args))
822
2266
timevalue += delta
823
2267
return timevalue
824
2268
825
2269
826
def server_state_changed(state):
827
"""Derived from the Avahi example code"""
828
if state == avahi.SERVER_COLLISION:
829
logger.error(u"Zeroconf server name collision")
830
service.remove()
831
elif state == avahi.SERVER_RUNNING:
832
service.add()
833
834
835
def entry_group_state_changed(state, error):
836
"""Derived from the Avahi example code"""
837
logger.debug(u"Avahi state change: %i", state)
838
839
if state == avahi.ENTRY_GROUP_ESTABLISHED:
840
logger.debug(u"Zeroconf service established.")
841
elif state == avahi.ENTRY_GROUP_COLLISION:
842
logger.warning(u"Zeroconf service name collision.")
843
service.rename()
844
elif state == avahi.ENTRY_GROUP_FAILURE:
845
logger.critical(u"Avahi: Error in group state changed %s",
846
unicode(error))
847
raise AvahiGroupError(u"State changed: %s" % unicode(error))
848
849
def if_nametoindex(interface):
850
"""Call the C function if_nametoindex(), or equivalent"""
851
global if_nametoindex
852
try:
853
if_nametoindex = (ctypes.cdll.LoadLibrary
854
(ctypes.util.find_library("c"))
855
.if_nametoindex)
856
except (OSError, AttributeError):
857
if "struct" not in sys.modules:
858
import struct
859
if "fcntl" not in sys.modules:
860
import fcntl
861
def if_nametoindex(interface):
862
"Get an interface index the hard way, i.e. using fcntl()"
863
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
864
with closing(socket.socket()) as s:
865
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
866
struct.pack("16s16x", interface))
867
interface_index = struct.unpack("I", ifreq[16:20])[0]
868
return interface_index
869
return if_nametoindex(interface)
870
871
872
2270
def daemon(nochdir = False, noclose = False):
873
2271
"""See daemon(3). Standard BSD Unix function.
2272
874
2273
This should really exist as os.daemon, but it doesn't (yet)."""
875
2274
if os.fork():
876
2275
sys.exit()
881
2280
sys.exit()
882
2281
if not noclose:
883
2282
# Close all standard open file descriptors
884
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2283
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
885
2284
if not stat.S_ISCHR(os.fstat(null).st_mode):
886
2285
raise OSError(errno.ENODEV,
887
"/dev/null not a character device")
2286
"{0} not a character device"
2287
.format(os.devnull))
888
2288
os.dup2(null, sys.stdin.fileno())
889
2289
os.dup2(null, sys.stdout.fileno())
890
2290
os.dup2(null, sys.stderr.fileno())
893
2293
894
2294
895
2295
def main():
896
parser = optparse.OptionParser(version = "%%prog %s" % version)
897
parser.add_option("-i", "--interface", type="string",
898
metavar="IF", help="Bind to interface IF")
899
parser.add_option("-a", "--address", type="string",
900
help="Address to listen for requests on")
901
parser.add_option("-p", "--port", type="int",
902
help="Port number to receive requests on")
903
parser.add_option("--check", action="store_true",
904
help="Run self-test")
905
parser.add_option("--debug", action="store_true",
906
help="Debug mode; run in foreground and log to"
907
" terminal")
908
parser.add_option("--priority", type="string", help="GnuTLS"
909
" priority string (see GnuTLS documentation)")
910
parser.add_option("--servicename", type="string", metavar="NAME",
911
help="Zeroconf service name")
912
parser.add_option("--configdir", type="string",
913
default="/etc/mandos", metavar="DIR",
914
help="Directory to search for configuration"
915
" files")
916
parser.add_option("--no-dbus", action="store_false",
917
dest="use_dbus",
918
help="Do not provide D-Bus system bus"
919
" interface")
920
options = parser.parse_args()[0]
2296
2297
##################################################################
2298
# Parsing of options, both command line and config file
2299
2300
parser = argparse.ArgumentParser()
2301
parser.add_argument("-v", "--version", action="version",
2302
version = "%(prog)s {0}".format(version),
2303
help="show version number and exit")
2304
parser.add_argument("-i", "--interface", metavar="IF",
2305
help="Bind to interface IF")
2306
parser.add_argument("-a", "--address",
2307
help="Address to listen for requests on")
2308
parser.add_argument("-p", "--port", type=int,
2309
help="Port number to receive requests on")
2310
parser.add_argument("--check", action="store_true",
2311
help="Run self-test")
2312
parser.add_argument("--debug", action="store_true",
2313
help="Debug mode; run in foreground and log"
2314
" to terminal", default=None)
2315
parser.add_argument("--debuglevel", metavar="LEVEL",
2316
help="Debug level for stdout output")
2317
parser.add_argument("--priority", help="GnuTLS"
2318
" priority string (see GnuTLS documentation)")
2319
parser.add_argument("--servicename",
2320
metavar="NAME", help="Zeroconf service name")
2321
parser.add_argument("--configdir",
2322
default="/etc/mandos", metavar="DIR",
2323
help="Directory to search for configuration"
2324
" files")
2325
parser.add_argument("--no-dbus", action="store_false",
2326
dest="use_dbus", help="Do not provide D-Bus"
2327
" system bus interface", default=None)
2328
parser.add_argument("--no-ipv6", action="store_false",
2329
dest="use_ipv6", help="Do not use IPv6",
2330
default=None)
2331
parser.add_argument("--no-restore", action="store_false",
2332
dest="restore", help="Do not restore stored"
2333
" state", default=None)
2334
parser.add_argument("--socket", type=int,
2335
help="Specify a file descriptor to a network"
2336
" socket to use instead of creating one")
2337
parser.add_argument("--statedir", metavar="DIR",
2338
help="Directory to save/restore state in")
2339
parser.add_argument("--foreground", action="store_true",
2340
help="Run in foreground", default=None)
2341
2342
options = parser.parse_args()
921
2343
922
2344
if options.check:
923
2345
import doctest
930
2352
"port": "",
931
2353
"debug": "False",
932
2354
"priority":
933
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2355
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
934
2356
"servicename": "Mandos",
935
2357
"use_dbus": "True",
2358
"use_ipv6": "True",
2359
"debuglevel": "",
2360
"restore": "True",
2361
"socket": "",
2362
"statedir": "/var/lib/mandos",
2363
"foreground": "False",
936
2364
}
937
2365
938
2366
# Parse config file for server-global settings
939
server_config = ConfigParser.SafeConfigParser(server_defaults)
2367
server_config = configparser.SafeConfigParser(server_defaults)
940
2368
del server_defaults
941
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2369
server_config.read(os.path.join(options.configdir,
2370
"mandos.conf"))
942
2371
# Convert the SafeConfigParser object to a dict
943
2372
server_settings = server_config.defaults()
944
# Use getboolean on the boolean config options
945
server_settings["debug"] = (server_config.getboolean
946
("DEFAULT", "debug"))
947
server_settings["use_dbus"] = (server_config.getboolean
948
("DEFAULT", "use_dbus"))
2373
# Use the appropriate methods on the non-string config options
2374
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2375
server_settings[option] = server_config.getboolean("DEFAULT",
2376
option)
2377
if server_settings["port"]:
2378
server_settings["port"] = server_config.getint("DEFAULT",
2379
"port")
2380
if server_settings["socket"]:
2381
server_settings["socket"] = server_config.getint("DEFAULT",
2382
"socket")
2383
# Later, stdin will, and stdout and stderr might, be dup'ed
2384
# over with an opened os.devnull. But we don't want this to
2385
# happen with a supplied network socket.
2386
if 0 <= server_settings["socket"] <= 2:
2387
server_settings["socket"] = os.dup(server_settings
2388
["socket"])
949
2389
del server_config
950
2390
951
2391
# Override the settings from the config file with command line
952
2392
# options, if set.
953
2393
for option in ("interface", "address", "port", "debug",
954
2394
"priority", "servicename", "configdir",
955
"use_dbus"):
2395
"use_dbus", "use_ipv6", "debuglevel", "restore",
2396
"statedir", "socket", "foreground"):
956
2397
value = getattr(options, option)
957
2398
if value is not None:
958
2399
server_settings[option] = value
959
2400
del options
2401
# Force all strings to be unicode
2402
for option in server_settings.keys():
2403
if type(server_settings[option]) is str:
2404
server_settings[option] = unicode(server_settings[option])
2405
# Force all boolean options to be boolean
2406
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
"foreground"):
2408
server_settings[option] = bool(server_settings[option])
2409
# Debug implies foreground
2410
if server_settings["debug"]:
2411
server_settings["foreground"] = True
960
2412
# Now we have our good server settings in "server_settings"
961
2413
2414
##################################################################
2415
962
2416
# For convenience
963
2417
debug = server_settings["debug"]
2418
debuglevel = server_settings["debuglevel"]
964
2419
use_dbus = server_settings["use_dbus"]
2420
use_ipv6 = server_settings["use_ipv6"]
2421
stored_state_path = os.path.join(server_settings["statedir"],
2422
stored_state_file)
2423
foreground = server_settings["foreground"]
965
2424
966
if not debug:
967
syslogger.setLevel(logging.WARNING)
968
console.setLevel(logging.WARNING)
2425
if debug:
2426
initlogger(debug, logging.DEBUG)
2427
else:
2428
if not debuglevel:
2429
initlogger(debug)
2430
else:
2431
level = getattr(logging, debuglevel.upper())
2432
initlogger(debug, level)
969
2433
970
2434
if server_settings["servicename"] != "Mandos":
971
2435
syslogger.setFormatter(logging.Formatter
972
('Mandos (%s): %%(levelname)s:'
973
' %%(message)s'
974
% server_settings["servicename"]))
2436
('Mandos ({0}) [%(process)d]:'
2437
' %(levelname)s: %(message)s'
2438
.format(server_settings
2439
["servicename"])))
975
2440
976
2441
# Parse config file with clients
977
client_defaults = { "timeout": "1h",
978
"interval": "5m",
979
"checker": "fping -q -- %%(host)s",
980
"host": "",
981
}
982
client_config = ConfigParser.SafeConfigParser(client_defaults)
2442
client_config = configparser.SafeConfigParser(Client
2443
.client_defaults)
983
2444
client_config.read(os.path.join(server_settings["configdir"],
984
2445
"clients.conf"))
985
2446
986
clients = Set()
987
tcp_server = IPv6_TCPServer((server_settings["address"],
988
server_settings["port"]),
989
TCP_handler,
990
settings=server_settings,
991
clients=clients)
992
pidfilename = "/var/run/mandos.pid"
993
try:
994
pidfile = open(pidfilename, "w")
995
except IOError, error:
996
logger.error("Could not open file %r", pidfilename)
997
998
try:
999
uid = pwd.getpwnam("_mandos").pw_uid
1000
gid = pwd.getpwnam("_mandos").pw_gid
1001
except KeyError:
1002
try:
1003
uid = pwd.getpwnam("mandos").pw_uid
1004
gid = pwd.getpwnam("mandos").pw_gid
2447
global mandos_dbus_service
2448
mandos_dbus_service = None
2449
2450
tcp_server = MandosServer((server_settings["address"],
2451
server_settings["port"]),
2452
ClientHandler,
2453
interface=(server_settings["interface"]
2454
or None),
2455
use_ipv6=use_ipv6,
2456
gnutls_priority=
2457
server_settings["priority"],
2458
use_dbus=use_dbus,
2459
socketfd=(server_settings["socket"]
2460
or None))
2461
if not foreground:
2462
pidfilename = "/run/mandos.pid"
2463
if not os.path.isdir("/run/."):
2464
pidfilename = "/var/run/mandos.pid"
2465
pidfile = None
2466
try:
2467
pidfile = open(pidfilename, "w")
2468
except IOError as e:
2469
logger.error("Could not open file %r", pidfilename,
2470
exc_info=e)
2471
2472
for name in ("_mandos", "mandos", "nobody"):
2473
try:
2474
uid = pwd.getpwnam(name).pw_uid
2475
gid = pwd.getpwnam(name).pw_gid
2476
break
1005
2477
except KeyError:
1006
try:
1007
uid = pwd.getpwnam("nobody").pw_uid
1008
gid = pwd.getpwnam("nogroup").pw_gid
1009
except KeyError:
1010
uid = 65534
1011
gid = 65534
2478
continue
2479
else:
2480
uid = 65534
2481
gid = 65534
1012
2482
try:
2483
os.setgid(gid)
1013
2484
os.setuid(uid)
1014
os.setgid(gid)
1015
except OSError, error:
1016
if error[0] != errno.EPERM:
1017
raise error
1018
1019
global service
1020
service = AvahiService(name = server_settings["servicename"],
1021
servicetype = "_mandos._tcp", )
1022
if server_settings["interface"]:
1023
service.interface = (if_nametoindex
1024
(server_settings["interface"]))
2485
except OSError as error:
2486
if error.errno != errno.EPERM:
2487
raise
2488
2489
if debug:
2490
# Enable all possible GnuTLS debugging
2491
2492
# "Use a log level over 10 to enable all debugging options."
2493
# - GnuTLS manual
2494
gnutls.library.functions.gnutls_global_set_log_level(11)
2495
2496
@gnutls.library.types.gnutls_log_func
2497
def debug_gnutls(level, string):
2498
logger.debug("GnuTLS: %s", string[:-1])
2499
2500
(gnutls.library.functions
2501
.gnutls_global_set_log_function(debug_gnutls))
2502
2503
# Redirect stdin so all checkers get /dev/null
2504
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2505
os.dup2(null, sys.stdin.fileno())
2506
if null > 2:
2507
os.close(null)
2508
2509
# Need to fork before connecting to D-Bus
2510
if not foreground:
2511
# Close all input and output, do double fork, etc.
2512
daemon()
2513
2514
# multiprocessing will use threads, so before we use gobject we
2515
# need to inform gobject that threads will be used.
2516
gobject.threads_init()
1025
2517
1026
2518
global main_loop
1027
global bus
1028
global server
1029
2519
# From the Avahi example code
1030
DBusGMainLoop(set_as_default=True )
2520
DBusGMainLoop(set_as_default=True)
1031
2521
main_loop = gobject.MainLoop()
1032
2522
bus = dbus.SystemBus()
1033
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1034
avahi.DBUS_PATH_SERVER),
1035
avahi.DBUS_INTERFACE_SERVER)
1036
2523
# End of Avahi example code
1037
2524
if use_dbus:
1038
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1039
bus)
1040
1041
clients.update(Set(Client(name = section,
1042
config
1043
= dict(client_config.items(section)),
1044
use_dbus = use_dbus)
1045
for section in client_config.sections()))
1046
if not clients:
1047
logger.warning(u"No clients defined")
1048
1049
if debug:
1050
# Redirect stdin so all checkers get /dev/null
1051
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1052
os.dup2(null, sys.stdin.fileno())
1053
if null > 2:
1054
os.close(null)
1055
else:
1056
# No console logging
1057
logger.removeHandler(console)
1058
# Close all input and output, do double fork, etc.
1059
daemon()
1060
1061
try:
1062
pid = os.getpid()
1063
pidfile.write(str(pid) + "\n")
1064
pidfile.close()
2525
try:
2526
bus_name = dbus.service.BusName("se.recompile.Mandos",
2527
bus, do_not_queue=True)
2528
old_bus_name = (dbus.service.BusName
2529
("se.bsnet.fukt.Mandos", bus,
2530
do_not_queue=True))
2531
except dbus.exceptions.NameExistsException as e:
2532
logger.error("Disabling D-Bus:", exc_info=e)
2533
use_dbus = False
2534
server_settings["use_dbus"] = False
2535
tcp_server.use_dbus = False
2536
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2537
service = AvahiServiceToSyslog(name =
2538
server_settings["servicename"],
2539
servicetype = "_mandos._tcp",
2540
protocol = protocol, bus = bus)
2541
if server_settings["interface"]:
2542
service.interface = (if_nametoindex
2543
(str(server_settings["interface"])))
2544
2545
global multiprocessing_manager
2546
multiprocessing_manager = multiprocessing.Manager()
2547
2548
client_class = Client
2549
if use_dbus:
2550
client_class = functools.partial(ClientDBus, bus = bus)
2551
2552
client_settings = Client.config_parser(client_config)
2553
old_client_settings = {}
2554
clients_data = {}
2555
2556
# This is used to redirect stdout and stderr for checker processes
2557
global wnull
2558
wnull = open(os.devnull, "w") # A writable /dev/null
2559
# Only used if server is running in foreground but not in debug
2560
# mode
2561
if debug or not foreground:
2562
wnull.close()
2563
2564
# Get client data and settings from last running state.
2565
if server_settings["restore"]:
2566
try:
2567
with open(stored_state_path, "rb") as stored_state:
2568
clients_data, old_client_settings = (pickle.load
2569
(stored_state))
2570
os.remove(stored_state_path)
2571
except IOError as e:
2572
if e.errno == errno.ENOENT:
2573
logger.warning("Could not load persistent state: {0}"
2574
.format(os.strerror(e.errno)))
2575
else:
2576
logger.critical("Could not load persistent state:",
2577
exc_info=e)
2578
raise
2579
except EOFError as e:
2580
logger.warning("Could not load persistent state: "
2581
"EOFError:", exc_info=e)
2582
2583
with PGPEngine() as pgp:
2584
for client_name, client in clients_data.iteritems():
2585
# Skip removed clients
2586
if client_name not in client_settings:
2587
continue
2588
2589
# Decide which value to use after restoring saved state.
2590
# We have three different values: Old config file,
2591
# new config file, and saved state.
2592
# New config value takes precedence if it differs from old
2593
# config value, otherwise use saved state.
2594
for name, value in client_settings[client_name].items():
2595
try:
2596
# For each value in new config, check if it
2597
# differs from the old config value (Except for
2598
# the "secret" attribute)
2599
if (name != "secret" and
2600
value != old_client_settings[client_name]
2601
[name]):
2602
client[name] = value
2603
except KeyError:
2604
pass
2605
2606
# Clients who has passed its expire date can still be
2607
# enabled if its last checker was successful. Clients
2608
# whose checker succeeded before we stored its state is
2609
# assumed to have successfully run all checkers during
2610
# downtime.
2611
if client["enabled"]:
2612
if datetime.datetime.utcnow() >= client["expires"]:
2613
if not client["last_checked_ok"]:
2614
logger.warning(
2615
"disabling client {0} - Client never "
2616
"performed a successful checker"
2617
.format(client_name))
2618
client["enabled"] = False
2619
elif client["last_checker_status"] != 0:
2620
logger.warning(
2621
"disabling client {0} - Client "
2622
"last checker failed with error code {1}"
2623
.format(client_name,
2624
client["last_checker_status"]))
2625
client["enabled"] = False
2626
else:
2627
client["expires"] = (datetime.datetime
2628
.utcnow()
2629
+ client["timeout"])
2630
logger.debug("Last checker succeeded,"
2631
" keeping {0} enabled"
2632
.format(client_name))
2633
try:
2634
client["secret"] = (
2635
pgp.decrypt(client["encrypted_secret"],
2636
client_settings[client_name]
2637
["secret"]))
2638
except PGPError:
2639
# If decryption fails, we use secret from new settings
2640
logger.debug("Failed to decrypt {0} old secret"
2641
.format(client_name))
2642
client["secret"] = (
2643
client_settings[client_name]["secret"])
2644
2645
# Add/remove clients based on new changes made to config
2646
for client_name in (set(old_client_settings)
2647
- set(client_settings)):
2648
del clients_data[client_name]
2649
for client_name in (set(client_settings)
2650
- set(old_client_settings)):
2651
clients_data[client_name] = client_settings[client_name]
2652
2653
# Create all client objects
2654
for client_name, client in clients_data.iteritems():
2655
tcp_server.clients[client_name] = client_class(
2656
name = client_name, settings = client,
2657
server_settings = server_settings)
2658
2659
if not tcp_server.clients:
2660
logger.warning("No clients defined")
2661
2662
if not foreground:
2663
if pidfile is not None:
2664
try:
2665
with pidfile:
2666
pid = os.getpid()
2667
pidfile.write(str(pid) + "\n".encode("utf-8"))
2668
except IOError:
2669
logger.error("Could not write to file %r with PID %d",
2670
pidfilename, pid)
1065
2671
del pidfile
1066
except IOError:
1067
logger.error(u"Could not write to file %r with PID %d",
1068
pidfilename, pid)
1069
except NameError:
1070
# "pidfile" was never created
1071
pass
1072
del pidfilename
1073
1074
def cleanup():
1075
"Cleanup function; run on exit"
1076
global group
1077
# From the Avahi example code
1078
if not group is None:
1079
group.Free()
1080
group = None
1081
# End of Avahi example code
1082
1083
while clients:
1084
client = clients.pop()
1085
client.disable_hook = None
1086
client.disable()
1087
1088
atexit.register(cleanup)
1089
1090
if not debug:
1091
signal.signal(signal.SIGINT, signal.SIG_IGN)
2672
del pidfilename
2673
1092
2674
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1093
2675
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1094
2676
1095
2677
if use_dbus:
1096
class MandosServer(dbus.service.Object):
2678
@alternate_dbus_interfaces({"se.recompile.Mandos":
2679
"se.bsnet.fukt.Mandos"})
2680
class MandosDBusService(DBusObjectWithProperties):
1097
2681
"""A D-Bus proxy object"""
1098
2682
def __init__(self):
1099
dbus.service.Object.__init__(self, bus,
1100
"/Mandos")
1101
_interface = u"org.mandos_system.Mandos"
1102
1103
@dbus.service.signal(_interface, signature="oa{sv}")
1104
def ClientAdded(self, objpath, properties):
2683
dbus.service.Object.__init__(self, bus, "/")
2684
_interface = "se.recompile.Mandos"
2685
2686
@dbus_interface_annotations(_interface)
2687
def _foo(self):
2688
return { "org.freedesktop.DBus.Property"
2689
".EmitsChangedSignal":
2690
"false"}
2691
2692
@dbus.service.signal(_interface, signature="o")
2693
def ClientAdded(self, objpath):
2694
"D-Bus signal"
2695
pass
2696
2697
@dbus.service.signal(_interface, signature="ss")
2698
def ClientNotFound(self, fingerprint, address):
1105
2699
"D-Bus signal"
1106
2700
pass
1107
2701
1112
2706
1113
2707
@dbus.service.method(_interface, out_signature="ao")
1114
2708
def GetAllClients(self):
1115
return dbus.Array(c.dbus_object_path for c in clients)
2709
"D-Bus method"
2710
return dbus.Array(c.dbus_object_path
2711
for c in
2712
tcp_server.clients.itervalues())
1116
2713
1117
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2714
@dbus.service.method(_interface,
2715
out_signature="a{oa{sv}}")
1118
2716
def GetAllClientsWithProperties(self):
2717
"D-Bus method"
1119
2718
return dbus.Dictionary(
1120
((c.dbus_object_path, c.GetAllProperties())
1121
for c in clients),
2719
((c.dbus_object_path, c.GetAll(""))
2720
for c in tcp_server.clients.itervalues()),
1122
2721
signature="oa{sv}")
1123
2722
1124
2723
@dbus.service.method(_interface, in_signature="o")
1125
2724
def RemoveClient(self, object_path):
1126
for c in clients:
2725
"D-Bus method"
2726
for c in tcp_server.clients.itervalues():
1127
2727
if c.dbus_object_path == object_path:
1128
clients.remove(c)
2728
del tcp_server.clients[c.name]
2729
c.remove_from_connection()
1129
2730
# Don't signal anything except ClientRemoved
1130
c.use_dbus = False
1131
c.disable()
2731
c.disable(quiet=True)
1132
2732
# Emit D-Bus signal
1133
2733
self.ClientRemoved(object_path, c.name)
1134
2734
return
1135
raise KeyError
1136
1137
@dbus.service.method(_interface, in_signature="s")
1138
def RemoveClientByName(self, name):
1139
for c in clients:
1140
if c.name == name:
1141
clients.remove(c)
1142
# Don't signal anything except ClientRemoved
1143
c.use_dbus = False
1144
c.disable()
1145
# Emit D-Bus signal
1146
self.ClientRemoved(c.dbus_object_path, name)
1147
return
1148
raise KeyError
1149
1150
@dbus.service.method(_interface)
1151
def Quit(self):
1152
main_loop.quit()
2735
raise KeyError(object_path)
1153
2736
1154
2737
del _interface
1155
2738
1156
mandos_server = MandosServer()
1157
1158
for client in clients:
2739
mandos_dbus_service = MandosDBusService()
2740
2741
def cleanup():
2742
"Cleanup function; run on exit"
2743
service.cleanup()
2744
2745
multiprocessing.active_children()
2746
wnull.close()
2747
if not (tcp_server.clients or client_settings):
2748
return
2749
2750
# Store client before exiting. Secrets are encrypted with key
2751
# based on what config file has. If config file is
2752
# removed/edited, old secret will thus be unrecovable.
2753
clients = {}
2754
with PGPEngine() as pgp:
2755
for client in tcp_server.clients.itervalues():
2756
key = client_settings[client.name]["secret"]
2757
client.encrypted_secret = pgp.encrypt(client.secret,
2758
key)
2759
client_dict = {}
2760
2761
# A list of attributes that can not be pickled
2762
# + secret.
2763
exclude = set(("bus", "changedstate", "secret",
2764
"checker", "server_settings"))
2765
for name, typ in (inspect.getmembers
2766
(dbus.service.Object)):
2767
exclude.add(name)
2768
2769
client_dict["encrypted_secret"] = (client
2770
.encrypted_secret)
2771
for attr in client.client_structure:
2772
if attr not in exclude:
2773
client_dict[attr] = getattr(client, attr)
2774
2775
clients[client.name] = client_dict
2776
del client_settings[client.name]["secret"]
2777
2778
try:
2779
with (tempfile.NamedTemporaryFile
2780
(mode='wb', suffix=".pickle", prefix='clients-',
2781
dir=os.path.dirname(stored_state_path),
2782
delete=False)) as stored_state:
2783
pickle.dump((clients, client_settings), stored_state)
2784
tempname=stored_state.name
2785
os.rename(tempname, stored_state_path)
2786
except (IOError, OSError) as e:
2787
if not debug:
2788
try:
2789
os.remove(tempname)
2790
except NameError:
2791
pass
2792
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2793
logger.warning("Could not save persistent state: {0}"
2794
.format(os.strerror(e.errno)))
2795
else:
2796
logger.warning("Could not save persistent state:",
2797
exc_info=e)
2798
raise
2799
2800
# Delete all clients, and settings from config
2801
while tcp_server.clients:
2802
name, client = tcp_server.clients.popitem()
2803
if use_dbus:
2804
client.remove_from_connection()
2805
# Don't signal anything except ClientRemoved
2806
client.disable(quiet=True)
2807
if use_dbus:
2808
# Emit D-Bus signal
2809
mandos_dbus_service.ClientRemoved(client
2810
.dbus_object_path,
2811
client.name)
2812
client_settings.clear()
2813
2814
atexit.register(cleanup)
2815
2816
for client in tcp_server.clients.itervalues():
1159
2817
if use_dbus:
1160
2818
# Emit D-Bus signal
1161
mandos_server.ClientAdded(client.dbus_object_path,
1162
client.GetAllProperties())
1163
client.enable()
2819
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2820
# Need to initiate checking of clients
2821
if client.enabled:
2822
client.init_checker()
1164
2823
1165
2824
tcp_server.enable()
1166
2825
tcp_server.server_activate()
1167
2826
1168
2827
# Find out what port we got
1169
2828
service.port = tcp_server.socket.getsockname()[1]
1170
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1171
u" scope_id %d" % tcp_server.socket.getsockname())
2829
if use_ipv6:
2830
logger.info("Now listening on address %r, port %d,"
2831
" flowinfo %d, scope_id %d",
2832
*tcp_server.socket.getsockname())
2833
else: # IPv4
2834
logger.info("Now listening on address %r, port %d",
2835
*tcp_server.socket.getsockname())
1172
2836
1173
2837
#service.interface = tcp_server.socket.getsockname()[3]
1174
2838
1175
2839
try:
1176
2840
# From the Avahi example code
1177
server.connect_to_signal("StateChanged", server_state_changed)
1178
2841
try:
1179
server_state_changed(server.GetState())
1180
except dbus.exceptions.DBusException, error:
1181
logger.critical(u"DBusException: %s", error)
2842
service.activate()
2843
except dbus.exceptions.DBusException as error:
2844
logger.critical("D-Bus Exception", exc_info=error)
2845
cleanup()
1182
2846
sys.exit(1)
1183
2847
# End of Avahi example code
1184
2848
1187
2851
(tcp_server.handle_request
1188
2852
(*args[2:], **kwargs) or True))
1189
2853
1190
logger.debug(u"Starting main loop")
2854
logger.debug("Starting main loop")
1191
2855
main_loop.run()
1192
except AvahiError, error:
1193
logger.critical(u"AvahiError: %s", error)
2856
except AvahiError as error:
2857
logger.critical("Avahi Error", exc_info=error)
2858
cleanup()
1194
2859
sys.exit(1)
1195
2860
except KeyboardInterrupt:
1196
2861
if debug:
1197
print
2862
print("", file=sys.stderr)
2863
logger.debug("Server received KeyboardInterrupt")
2864
logger.debug("Server exiting")
2865
# Must run before the D-Bus bus name gets deregistered
2866
cleanup()
1198
2867
1199
2868
if __name__ == '__main__':
1200
2869
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0