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- Committer: Teddy Hogeborn
- Date: 2013-10-20 15:25:09 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 305.
- Revision ID: teddy@recompile.se-20131020152509-zkhuy2yse76w10hg
* Makefile (CFLAGS, LDFLAGS): Keep default flags from environment.
(purge-server): PID file changed to "/run/mandos.pid".
* debian/compat: Changed to "9".
* debian/control (Standards-Version): Updated to "3.9.4".
(DM-Upload-Allowed): Removed.
(mandos/Depends): Add "initscripts (>= 2.88dsf-13.3)" to be able to
use the "/run" directory (for mandos.pid).
* debian/copyright (Copyright): Update year.
* init.d-mandos (PIDFILE): Changed to "/run/mandos.pid".
* mandos: Update copyright year.
(pidfilename): Changed to "/run/mandos.pid".
* mandos-clients.conf.xml (OPTIONS/approval_delay): Bug fix: default
is "PT0S" - using
the new RFC 3339
duration syntax.
* mandos-keygen: Update copyright year.
* mandos-monitor: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
(FILES): PID file changed to "/run/mandos.pid".
* plugin-runner.c: Update copyright year.
* plugins.d/mandos-client.c: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/plymouth.c: - '' -
(purge-server): PID file changed to "/run/mandos.pid".
* debian/compat: Changed to "9".
* debian/control (Standards-Version): Updated to "3.9.4".
(DM-Upload-Allowed): Removed.
(mandos/Depends): Add "initscripts (>= 2.88dsf-13.3)" to be able to
use the "/run" directory (for mandos.pid).
* debian/copyright (Copyright): Update year.
* init.d-mandos (PIDFILE): Changed to "/run/mandos.pid".
* mandos: Update copyright year.
(pidfilename): Changed to "/run/mandos.pid".
* mandos-clients.conf.xml (OPTIONS/approval_delay): Bug fix: default
is "PT0S" - using
the new RFC 3339
duration syntax.
* mandos-keygen: Update copyright year.
* mandos-monitor: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
(FILES): PID file changed to "/run/mandos.pid".
* plugin-runner.c: Update copyright year.
* plugins.d/mandos-client.c: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/plymouth.c: - '' -
- 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 © 2008-2013 Teddy Hogeborn
15
# Copyright © 2008-2013 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 = "1.0.7"
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 = "1.6.1"
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 [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
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
return b"mandos" + binascii.hexlify(password)
176
177
def encrypt(self, data, password):
178
passphrase = self.password_encode(password)
179
with tempfile.NamedTemporaryFile(dir=self.tempdir
180
) as passfile:
181
passfile.write(passphrase)
182
passfile.flush()
183
proc = subprocess.Popen(['gpg', '--symmetric',
184
'--passphrase-file',
185
passfile.name]
186
+ self.gnupgargs,
187
stdin = subprocess.PIPE,
188
stdout = subprocess.PIPE,
189
stderr = subprocess.PIPE)
190
ciphertext, err = proc.communicate(input = data)
191
if proc.returncode != 0:
192
raise PGPError(err)
193
return ciphertext
194
195
def decrypt(self, data, password):
196
passphrase = self.password_encode(password)
197
with tempfile.NamedTemporaryFile(dir = self.tempdir
198
) as passfile:
199
passfile.write(passphrase)
200
passfile.flush()
201
proc = subprocess.Popen(['gpg', '--decrypt',
202
'--passphrase-file',
203
passfile.name]
204
+ self.gnupgargs,
205
stdin = subprocess.PIPE,
206
stdout = subprocess.PIPE,
207
stderr = subprocess.PIPE)
208
decrypted_plaintext, err = proc.communicate(input
209
= data)
210
if proc.returncode != 0:
211
raise PGPError(err)
212
return decrypted_plaintext
213
84
214
85
215
class AvahiError(Exception):
86
216
def __init__(self, value, *args, **kwargs):
98
228
99
229
class AvahiService(object):
100
230
"""An Avahi (Zeroconf) service.
231
101
232
Attributes:
102
233
interface: integer; avahi.IF_UNSPEC or an interface index.
103
234
Used to optionally bind to the specified interface.
104
235
name: string; Example: 'Mandos'
105
236
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
237
See <https://www.iana.org/assignments/service-names-port-numbers>
107
238
port: integer; what port to announce
108
239
TXT: list of strings; TXT record for the service
109
240
domain: string; Domain to publish on, default to .local if empty.
111
242
max_renames: integer; maximum number of renames
112
243
rename_count: integer; counter so we only rename after collisions
113
244
a sensible number of times
245
group: D-Bus Entry Group
246
server: D-Bus Server
247
bus: dbus.SystemBus()
114
248
"""
249
115
250
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
251
servicetype = None, port = None, TXT = None,
117
252
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
253
protocol = avahi.PROTO_UNSPEC, bus = None):
119
254
self.interface = interface
120
255
self.name = name
121
256
self.type = servicetype
126
261
self.rename_count = 0
127
262
self.max_renames = max_renames
128
263
self.protocol = protocol
264
self.group = None # our entry group
265
self.server = None
266
self.bus = bus
267
self.entry_group_state_changed_match = None
268
129
269
def rename(self):
130
270
"""Derived from the Avahi example code"""
131
271
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
272
logger.critical("No suitable Zeroconf service name found"
273
" after %i retries, exiting.",
134
274
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
275
raise AvahiServiceError("Too many renames")
276
self.name = unicode(self.server
277
.GetAlternativeServiceName(self.name))
278
logger.info("Changing Zeroconf service name to %r ...",
279
self.name)
142
280
self.remove()
143
self.add()
281
try:
282
self.add()
283
except dbus.exceptions.DBusException as error:
284
logger.critical("D-Bus Exception", exc_info=error)
285
self.cleanup()
286
os._exit(1)
144
287
self.rename_count += 1
288
145
289
def remove(self):
146
290
"""Derived from the Avahi example code"""
147
if group is not None:
148
group.Reset()
291
if self.entry_group_state_changed_match is not None:
292
self.entry_group_state_changed_match.remove()
293
self.entry_group_state_changed_match = None
294
if self.group is not None:
295
self.group.Reset()
296
149
297
def add(self):
150
298
"""Derived from the Avahi example code"""
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
171
# From the Avahi example code:
172
group = None # our entry group
173
# End of Avahi example code
174
175
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
299
self.remove()
300
if self.group is None:
301
self.group = dbus.Interface(
302
self.bus.get_object(avahi.DBUS_NAME,
303
self.server.EntryGroupNew()),
304
avahi.DBUS_INTERFACE_ENTRY_GROUP)
305
self.entry_group_state_changed_match = (
306
self.group.connect_to_signal(
307
'StateChanged', self.entry_group_state_changed))
308
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
309
self.name, self.type)
310
self.group.AddService(
311
self.interface,
312
self.protocol,
313
dbus.UInt32(0), # flags
314
self.name, self.type,
315
self.domain, self.host,
316
dbus.UInt16(self.port),
317
avahi.string_array_to_txt_array(self.TXT))
318
self.group.Commit()
319
320
def entry_group_state_changed(self, state, error):
321
"""Derived from the Avahi example code"""
322
logger.debug("Avahi entry group state change: %i", state)
323
324
if state == avahi.ENTRY_GROUP_ESTABLISHED:
325
logger.debug("Zeroconf service established.")
326
elif state == avahi.ENTRY_GROUP_COLLISION:
327
logger.info("Zeroconf service name collision.")
328
self.rename()
329
elif state == avahi.ENTRY_GROUP_FAILURE:
330
logger.critical("Avahi: Error in group state changed %s",
331
unicode(error))
332
raise AvahiGroupError("State changed: {0!s}"
333
.format(error))
334
335
def cleanup(self):
336
"""Derived from the Avahi example code"""
337
if self.group is not None:
338
try:
339
self.group.Free()
340
except (dbus.exceptions.UnknownMethodException,
341
dbus.exceptions.DBusException):
342
pass
343
self.group = None
344
self.remove()
345
346
def server_state_changed(self, state, error=None):
347
"""Derived from the Avahi example code"""
348
logger.debug("Avahi server state change: %i", state)
349
bad_states = { avahi.SERVER_INVALID:
350
"Zeroconf server invalid",
351
avahi.SERVER_REGISTERING: None,
352
avahi.SERVER_COLLISION:
353
"Zeroconf server name collision",
354
avahi.SERVER_FAILURE:
355
"Zeroconf server failure" }
356
if state in bad_states:
357
if bad_states[state] is not None:
358
if error is None:
359
logger.error(bad_states[state])
360
else:
361
logger.error(bad_states[state] + ": %r", error)
362
self.cleanup()
363
elif state == avahi.SERVER_RUNNING:
364
self.add()
365
else:
366
if error is None:
367
logger.debug("Unknown state: %r", state)
368
else:
369
logger.debug("Unknown state: %r: %r", state, error)
370
371
def activate(self):
372
"""Derived from the Avahi example code"""
373
if self.server is None:
374
self.server = dbus.Interface(
375
self.bus.get_object(avahi.DBUS_NAME,
376
avahi.DBUS_PATH_SERVER,
377
follow_name_owner_changes=True),
378
avahi.DBUS_INTERFACE_SERVER)
379
self.server.connect_to_signal("StateChanged",
380
self.server_state_changed)
381
self.server_state_changed(self.server.GetState())
382
383
384
class AvahiServiceToSyslog(AvahiService):
385
def rename(self):
386
"""Add the new name to the syslog messages"""
387
ret = AvahiService.rename(self)
388
syslogger.setFormatter(logging.Formatter
389
('Mandos ({0}) [%(process)d]:'
390
' %(levelname)s: %(message)s'
391
.format(self.name)))
392
return ret
393
394
395
def timedelta_to_milliseconds(td):
396
"Convert a datetime.timedelta() to milliseconds"
397
return ((td.days * 24 * 60 * 60 * 1000)
398
+ (td.seconds * 1000)
399
+ (td.microseconds // 1000))
400
401
402
class Client(object):
182
403
"""A representation of a client host served by this server.
404
183
405
Attributes:
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
186
fingerprint: string (40 or 32 hexadecimal digits); used to
187
uniquely identify the client
188
secret: bytestring; sent verbatim (over TLS) to client
189
host: string; available for use by the checker command
190
created: datetime.datetime(); (UTC) object creation
191
last_enabled: datetime.datetime(); (UTC)
192
enabled: bool()
193
last_checked_ok: datetime.datetime(); (UTC) or None
194
timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
196
interval: datetime.timedelta(); How often to start a new checker
197
disable_hook: If set, called by disable() as disable_hook(self)
406
approved: bool(); 'None' if not yet approved/disapproved
407
approval_delay: datetime.timedelta(); Time to wait for approval
408
approval_duration: datetime.timedelta(); Duration of one approval
198
409
checker: subprocess.Popen(); a running checker process used
199
410
to see if the client lives.
200
411
'None' if no process is running.
201
checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
203
checker_callback_tag: - '' -
204
checker_command: string; External command which is run to check if
205
client lives. %() expansions are done at
412
checker_callback_tag: a gobject event source tag, or None
413
checker_command: string; External command which is run to check
414
if client lives. %() expansions are done at
206
415
runtime with vars(self) as dict, so that for
207
416
instance %(name)s can be used in the command.
417
checker_initiator_tag: a gobject event source tag, or None
418
created: datetime.datetime(); (UTC) object creation
419
client_structure: Object describing what attributes a client has
420
and is used for storing the client at exit
208
421
current_checker_command: string; current running checker_command
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
422
disable_initiator_tag: a gobject event source tag, or None
423
enabled: bool()
424
fingerprint: string (40 or 32 hexadecimal digits); used to
425
uniquely identify the client
426
host: string; available for use by the checker command
427
interval: datetime.timedelta(); How often to start a new checker
428
last_approval_request: datetime.datetime(); (UTC) or None
429
last_checked_ok: datetime.datetime(); (UTC) or None
430
last_checker_status: integer between 0 and 255 reflecting exit
431
status of last checker. -1 reflects crashed
432
checker, -2 means no checker completed yet.
433
last_enabled: datetime.datetime(); (UTC) or None
434
name: string; from the config file, used in log messages and
435
D-Bus identifiers
436
secret: bytestring; sent verbatim (over TLS) to client
437
timeout: datetime.timedelta(); How long from last_checked_ok
438
until this client is disabled
439
extended_timeout: extra long timeout when secret has been sent
440
runtime_expansions: Allowed attributes for runtime expansion.
441
expires: datetime.datetime(); time (UTC) when a client will be
442
disabled, or None
443
server_settings: The server_settings dict from main()
211
444
"""
445
446
runtime_expansions = ("approval_delay", "approval_duration",
447
"created", "enabled", "expires",
448
"fingerprint", "host", "interval",
449
"last_approval_request", "last_checked_ok",
450
"last_enabled", "name", "timeout")
451
client_defaults = { "timeout": "PT5M",
452
"extended_timeout": "PT15M",
453
"interval": "PT2M",
454
"checker": "fping -q -- %%(host)s",
455
"host": "",
456
"approval_delay": "PT0S",
457
"approval_duration": "PT1S",
458
"approved_by_default": "True",
459
"enabled": "True",
460
}
461
212
462
def timeout_milliseconds(self):
213
463
"Return the 'timeout' attribute in milliseconds"
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
464
return timedelta_to_milliseconds(self.timeout)
465
466
def extended_timeout_milliseconds(self):
467
"Return the 'extended_timeout' attribute in milliseconds"
468
return timedelta_to_milliseconds(self.extended_timeout)
217
469
218
470
def interval_milliseconds(self):
219
471
"Return the 'interval' attribute in milliseconds"
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
223
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
472
return timedelta_to_milliseconds(self.interval)
473
474
def approval_delay_milliseconds(self):
475
return timedelta_to_milliseconds(self.approval_delay)
476
477
@staticmethod
478
def config_parser(config):
479
"""Construct a new dict of client settings of this form:
480
{ client_name: {setting_name: value, ...}, ...}
481
with exceptions for any special settings as defined above.
482
NOTE: Must be a pure function. Must return the same result
483
value given the same arguments.
484
"""
485
settings = {}
486
for client_name in config.sections():
487
section = dict(config.items(client_name))
488
client = settings[client_name] = {}
489
490
client["host"] = section["host"]
491
# Reformat values from string types to Python types
492
client["approved_by_default"] = config.getboolean(
493
client_name, "approved_by_default")
494
client["enabled"] = config.getboolean(client_name,
495
"enabled")
496
497
client["fingerprint"] = (section["fingerprint"].upper()
498
.replace(" ", ""))
499
if "secret" in section:
500
client["secret"] = section["secret"].decode("base64")
501
elif "secfile" in section:
502
with open(os.path.expanduser(os.path.expandvars
503
(section["secfile"])),
504
"rb") as secfile:
505
client["secret"] = secfile.read()
506
else:
507
raise TypeError("No secret or secfile for section {0}"
508
.format(section))
509
client["timeout"] = string_to_delta(section["timeout"])
510
client["extended_timeout"] = string_to_delta(
511
section["extended_timeout"])
512
client["interval"] = string_to_delta(section["interval"])
513
client["approval_delay"] = string_to_delta(
514
section["approval_delay"])
515
client["approval_duration"] = string_to_delta(
516
section["approval_duration"])
517
client["checker_command"] = section["checker"]
518
client["last_approval_request"] = None
519
client["last_checked_ok"] = None
520
client["last_checker_status"] = -2
521
522
return settings
523
524
def __init__(self, settings, name = None, server_settings=None):
229
525
self.name = name
230
if config is None:
231
config = {}
232
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
526
if server_settings is None:
527
server_settings = {}
528
self.server_settings = server_settings
529
# adding all client settings
530
for setting, value in settings.iteritems():
531
setattr(self, setting, value)
532
533
if self.enabled:
534
if not hasattr(self, "last_enabled"):
535
self.last_enabled = datetime.datetime.utcnow()
536
if not hasattr(self, "expires"):
537
self.expires = (datetime.datetime.utcnow()
538
+ self.timeout)
539
else:
540
self.last_enabled = None
541
self.expires = None
542
543
logger.debug("Creating client %r", self.name)
234
544
# Uppercase and remove spaces from fingerprint for later
235
545
# comparison purposes with return value from the fingerprint()
236
546
# function
237
self.fingerprint = (config["fingerprint"].upper()
238
.replace(u" ", u""))
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
with closing(open(os.path.expanduser
244
(os.path.expandvars
245
(config["secfile"])))) as secfile:
246
self.secret = secfile.read()
247
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.utcnow()
252
self.enabled = False
253
self.last_enabled = None
254
self.last_checked_ok = None
255
self.timeout = string_to_delta(config["timeout"])
256
self.interval = string_to_delta(config["interval"])
257
self.disable_hook = disable_hook
547
logger.debug(" Fingerprint: %s", self.fingerprint)
548
self.created = settings.get("created",
549
datetime.datetime.utcnow())
550
551
# attributes specific for this server instance
258
552
self.checker = None
259
553
self.checker_initiator_tag = None
260
554
self.disable_initiator_tag = None
261
555
self.checker_callback_tag = None
262
self.checker_command = config["checker"]
263
556
self.current_checker_command = None
264
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
557
self.approved = None
558
self.approvals_pending = 0
559
self.changedstate = (multiprocessing_manager
560
.Condition(multiprocessing_manager
561
.Lock()))
562
self.client_structure = [attr for attr in
563
self.__dict__.iterkeys()
564
if not attr.startswith("_")]
565
self.client_structure.append("client_structure")
566
567
for name, t in inspect.getmembers(type(self),
568
lambda obj:
569
isinstance(obj,
570
property)):
571
if not name.startswith("_"):
572
self.client_structure.append(name)
573
574
# Send notice to process children that client state has changed
575
def send_changedstate(self):
576
with self.changedstate:
577
self.changedstate.notify_all()
274
578
275
579
def enable(self):
276
580
"""Start this client's checker and timeout hooks"""
581
if getattr(self, "enabled", False):
582
# Already enabled
583
return
584
self.expires = datetime.datetime.utcnow() + self.timeout
585
self.enabled = True
277
586
self.last_enabled = datetime.datetime.utcnow()
587
self.init_checker()
588
self.send_changedstate()
589
590
def disable(self, quiet=True):
591
"""Disable this client."""
592
if not getattr(self, "enabled", False):
593
return False
594
if not quiet:
595
logger.info("Disabling client %s", self.name)
596
if getattr(self, "disable_initiator_tag", None) is not None:
597
gobject.source_remove(self.disable_initiator_tag)
598
self.disable_initiator_tag = None
599
self.expires = None
600
if getattr(self, "checker_initiator_tag", None) is not None:
601
gobject.source_remove(self.checker_initiator_tag)
602
self.checker_initiator_tag = None
603
self.stop_checker()
604
self.enabled = False
605
if not quiet:
606
self.send_changedstate()
607
# Do not run this again if called by a gobject.timeout_add
608
return False
609
610
def __del__(self):
611
self.disable()
612
613
def init_checker(self):
278
614
# Schedule a new checker to be started an 'interval' from now,
279
615
# and every interval from then on.
616
if self.checker_initiator_tag is not None:
617
gobject.source_remove(self.checker_initiator_tag)
280
618
self.checker_initiator_tag = (gobject.timeout_add
281
619
(self.interval_milliseconds(),
282
620
self.start_checker))
283
# Also start a new checker *right now*.
284
self.start_checker()
285
621
# Schedule a disable() when 'timeout' has passed
622
if self.disable_initiator_tag is not None:
623
gobject.source_remove(self.disable_initiator_tag)
286
624
self.disable_initiator_tag = (gobject.timeout_add
287
625
(self.timeout_milliseconds(),
288
626
self.disable))
289
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
297
298
def disable(self):
299
"""Disable this client."""
300
if not getattr(self, "enabled", False):
301
return False
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, "disable_initiator_tag", False):
304
gobject.source_remove(self.disable_initiator_tag)
305
self.disable_initiator_tag = None
306
if getattr(self, "checker_initiator_tag", False):
307
gobject.source_remove(self.checker_initiator_tag)
308
self.checker_initiator_tag = None
309
self.stop_checker()
310
if self.disable_hook:
311
self.disable_hook(self)
312
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
317
# Do not run this again if called by a gobject.timeout_add
318
return False
319
320
def __del__(self):
321
self.disable_hook = None
322
self.disable()
627
# Also start a new checker *right now*.
628
self.start_checker()
323
629
324
630
def checker_callback(self, pid, condition, command):
325
631
"""The checker has completed, so take appropriate actions."""
326
632
self.checker_callback_tag = None
327
633
self.checker = None
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
332
634
if os.WIFEXITED(condition):
333
exitstatus = os.WEXITSTATUS(condition)
334
if exitstatus == 0:
335
logger.info(u"Checker for %(name)s succeeded",
635
self.last_checker_status = os.WEXITSTATUS(condition)
636
if self.last_checker_status == 0:
637
logger.info("Checker for %(name)s succeeded",
336
638
vars(self))
337
639
self.checked_ok()
338
640
else:
339
logger.info(u"Checker for %(name)s failed",
641
logger.info("Checker for %(name)s failed",
340
642
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
346
643
else:
347
logger.warning(u"Checker for %(name)s crashed?",
644
self.last_checker_status = -1
645
logger.warning("Checker for %(name)s crashed?",
348
646
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
354
647
355
648
def checked_ok(self):
356
"""Bump up the timeout for this client.
357
This should only be called when the client has been seen,
358
alive and well.
359
"""
649
"""Assert that the client has been seen, alive and well."""
360
650
self.last_checked_ok = datetime.datetime.utcnow()
361
gobject.source_remove(self.disable_initiator_tag)
362
self.disable_initiator_tag = (gobject.timeout_add
363
(self.timeout_milliseconds(),
364
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
651
self.last_checker_status = 0
652
self.bump_timeout()
653
654
def bump_timeout(self, timeout=None):
655
"""Bump up the timeout for this client."""
656
if timeout is None:
657
timeout = self.timeout
658
if self.disable_initiator_tag is not None:
659
gobject.source_remove(self.disable_initiator_tag)
660
self.disable_initiator_tag = None
661
if getattr(self, "enabled", False):
662
self.disable_initiator_tag = (gobject.timeout_add
663
(timedelta_to_milliseconds
664
(timeout), self.disable))
665
self.expires = datetime.datetime.utcnow() + timeout
666
667
def need_approval(self):
668
self.last_approval_request = datetime.datetime.utcnow()
371
669
372
670
def start_checker(self):
373
671
"""Start a new checker subprocess if one is not running.
672
374
673
If a checker already exists, leave it running and do
375
674
nothing."""
376
675
# The reason for not killing a running checker is that if we
377
# did that, then if a checker (for some reason) started
378
# running slowly and taking more than 'interval' time, the
379
# client would inevitably timeout, since no checker would get
380
# a chance to run to completion. If we instead leave running
676
# did that, and if a checker (for some reason) started running
677
# slowly and taking more than 'interval' time, then the client
678
# would inevitably timeout, since no checker would get a
679
# chance to run to completion. If we instead leave running
381
680
# checkers alone, the checker would have to take more time
382
# than 'timeout' for the client to be declared invalid, which
383
# is as it should be.
681
# than 'timeout' for the client to be disabled, which is as it
682
# should be.
384
683
385
684
# If a checker exists, make sure it is not a zombie
386
if self.checker is not None:
685
try:
387
686
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
687
except (AttributeError, OSError) as error:
688
if (isinstance(error, OSError)
689
and error.errno != errno.ECHILD):
690
raise error
691
else:
388
692
if pid:
389
693
logger.warning("Checker was a zombie")
390
694
gobject.source_remove(self.checker_callback_tag)
392
696
self.current_checker_command)
393
697
# Start a new checker if needed
394
698
if self.checker is None:
395
try:
396
# In case checker_command has exactly one % operator
397
command = self.checker_command % self.host
398
except TypeError:
399
# Escape attributes for the shell
400
escaped_attrs = dict((key, re.escape(str(val)))
401
for key, val in
402
vars(self).iteritems())
403
try:
404
command = self.checker_command % escaped_attrs
405
except TypeError, error:
406
logger.error(u'Could not format string "%s":'
407
u' %s', self.checker_command, error)
408
return True # Try again later
409
self.current_checker_command = command
410
try:
411
logger.info(u"Starting checker %r for %s",
699
# Escape attributes for the shell
700
escaped_attrs = dict(
701
(attr, re.escape(unicode(getattr(self, attr))))
702
for attr in
703
self.runtime_expansions)
704
try:
705
command = self.checker_command % escaped_attrs
706
except TypeError as error:
707
logger.error('Could not format string "%s"',
708
self.checker_command, exc_info=error)
709
return True # Try again later
710
self.current_checker_command = command
711
try:
712
logger.info("Starting checker %r for %s",
412
713
command, self.name)
413
714
# We don't need to redirect stdout and stderr, since
414
715
# in normal mode, that is already done by daemon(),
415
716
# and in debug mode we don't want to. (Stdin is
416
717
# always replaced by /dev/null.)
718
# The exception is when not debugging but nevertheless
719
# running in the foreground; use the previously
720
# created wnull.
721
popen_args = {}
722
if (not self.server_settings["debug"]
723
and self.server_settings["foreground"]):
724
popen_args.update({"stdout": wnull,
725
"stderr": wnull })
417
726
self.checker = subprocess.Popen(command,
418
727
close_fds=True,
419
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
426
self.checker_callback_tag = (gobject.child_watch_add
427
(self.checker.pid,
428
self.checker_callback,
429
data=command))
430
# The checker may have completed before the gobject
431
# watch was added. Check for this.
728
shell=True, cwd="/",
729
**popen_args)
730
except OSError as error:
731
logger.error("Failed to start subprocess",
732
exc_info=error)
733
return True
734
self.checker_callback_tag = (gobject.child_watch_add
735
(self.checker.pid,
736
self.checker_callback,
737
data=command))
738
# The checker may have completed before the gobject
739
# watch was added. Check for this.
740
try:
432
741
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
433
if pid:
434
gobject.source_remove(self.checker_callback_tag)
435
self.checker_callback(pid, status, command)
436
except OSError, error:
437
logger.error(u"Failed to start subprocess: %s",
438
error)
742
except OSError as error:
743
if error.errno == errno.ECHILD:
744
# This should never happen
745
logger.error("Child process vanished",
746
exc_info=error)
747
return True
748
raise
749
if pid:
750
gobject.source_remove(self.checker_callback_tag)
751
self.checker_callback(pid, status, command)
439
752
# Re-run this periodically if run by gobject.timeout_add
440
753
return True
441
754
446
759
self.checker_callback_tag = None
447
760
if getattr(self, "checker", None) is None:
448
761
return
449
logger.debug(u"Stopping checker for %(name)s", vars(self))
762
logger.debug("Stopping checker for %(name)s", vars(self))
450
763
try:
451
os.kill(self.checker.pid, signal.SIGTERM)
452
#os.sleep(0.5)
764
self.checker.terminate()
765
#time.sleep(0.5)
453
766
#if self.checker.poll() is None:
454
# os.kill(self.checker.pid, signal.SIGKILL)
455
except OSError, error:
767
# self.checker.kill()
768
except OSError as error:
456
769
if error.errno != errno.ESRCH: # No such process
457
770
raise
458
771
self.checker = None
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
462
463
def still_valid(self):
464
"""Has the timeout not yet passed for this client?"""
465
if not getattr(self, "enabled", False):
466
return False
467
now = datetime.datetime.utcnow()
468
if self.last_checked_ok is None:
469
return now < (self.created + self.timeout)
470
else:
471
return now < (self.last_checked_ok + self.timeout)
472
473
## D-Bus methods & signals
474
_interface = u"se.bsnet.fukt.Mandos.Client"
475
476
# CheckedOK - method
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
772
773
774
def dbus_service_property(dbus_interface, signature="v",
775
access="readwrite", byte_arrays=False):
776
"""Decorators for marking methods of a DBusObjectWithProperties to
777
become properties on the D-Bus.
778
779
The decorated method will be called with no arguments by "Get"
780
and with one argument by "Set".
781
782
The parameters, where they are supported, are the same as
783
dbus.service.method, except there is only "signature", since the
784
type from Get() and the type sent to Set() is the same.
785
"""
786
# Encoding deeply encoded byte arrays is not supported yet by the
787
# "Set" method, so we fail early here:
788
if byte_arrays and signature != "ay":
789
raise ValueError("Byte arrays not supported for non-'ay'"
790
" signature {0!r}".format(signature))
791
def decorator(func):
792
func._dbus_is_property = True
793
func._dbus_interface = dbus_interface
794
func._dbus_signature = signature
795
func._dbus_access = access
796
func._dbus_name = func.__name__
797
if func._dbus_name.endswith("_dbus_property"):
798
func._dbus_name = func._dbus_name[:-14]
799
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
800
return func
801
return decorator
802
803
804
def dbus_interface_annotations(dbus_interface):
805
"""Decorator for marking functions returning interface annotations
806
807
Usage:
808
809
@dbus_interface_annotations("org.example.Interface")
810
def _foo(self): # Function name does not matter
811
return {"org.freedesktop.DBus.Deprecated": "true",
812
"org.freedesktop.DBus.Property.EmitsChangedSignal":
813
"false"}
814
"""
815
def decorator(func):
816
func._dbus_is_interface = True
817
func._dbus_interface = dbus_interface
818
func._dbus_name = dbus_interface
819
return func
820
return decorator
821
822
823
def dbus_annotations(annotations):
824
"""Decorator to annotate D-Bus methods, signals or properties
825
Usage:
826
827
@dbus_service_property("org.example.Interface", signature="b",
828
access="r")
829
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
830
"org.freedesktop.DBus.Property."
831
"EmitsChangedSignal": "false"})
832
def Property_dbus_property(self):
833
return dbus.Boolean(False)
834
"""
835
def decorator(func):
836
func._dbus_annotations = annotations
837
return func
838
return decorator
839
840
841
class DBusPropertyException(dbus.exceptions.DBusException):
842
"""A base class for D-Bus property-related exceptions
843
"""
844
def __unicode__(self):
845
return unicode(str(self))
846
847
848
class DBusPropertyAccessException(DBusPropertyException):
849
"""A property's access permissions disallows an operation.
850
"""
851
pass
852
853
854
class DBusPropertyNotFound(DBusPropertyException):
855
"""An attempt was made to access a non-existing property.
856
"""
857
pass
858
859
860
class DBusObjectWithProperties(dbus.service.Object):
861
"""A D-Bus object with properties.
862
863
Classes inheriting from this can use the dbus_service_property
864
decorator to expose methods as D-Bus properties. It exposes the
865
standard Get(), Set(), and GetAll() methods on the D-Bus.
866
"""
867
868
@staticmethod
869
def _is_dbus_thing(thing):
870
"""Returns a function testing if an attribute is a D-Bus thing
871
872
If called like _is_dbus_thing("method") it returns a function
873
suitable for use as predicate to inspect.getmembers().
874
"""
875
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
876
False)
877
878
def _get_all_dbus_things(self, thing):
879
"""Returns a generator of (name, attribute) pairs
880
"""
881
return ((getattr(athing.__get__(self), "_dbus_name",
882
name),
883
athing.__get__(self))
884
for cls in self.__class__.__mro__
885
for name, athing in
886
inspect.getmembers(cls,
887
self._is_dbus_thing(thing)))
888
889
def _get_dbus_property(self, interface_name, property_name):
890
"""Returns a bound method if one exists which is a D-Bus
891
property with the specified name and interface.
892
"""
893
for cls in self.__class__.__mro__:
894
for name, value in (inspect.getmembers
895
(cls,
896
self._is_dbus_thing("property"))):
897
if (value._dbus_name == property_name
898
and value._dbus_interface == interface_name):
899
return value.__get__(self)
900
901
# No such property
902
raise DBusPropertyNotFound(self.dbus_object_path + ":"
903
+ interface_name + "."
904
+ property_name)
905
906
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
907
out_signature="v")
908
def Get(self, interface_name, property_name):
909
"""Standard D-Bus property Get() method, see D-Bus standard.
910
"""
911
prop = self._get_dbus_property(interface_name, property_name)
912
if prop._dbus_access == "write":
913
raise DBusPropertyAccessException(property_name)
914
value = prop()
915
if not hasattr(value, "variant_level"):
916
return value
917
return type(value)(value, variant_level=value.variant_level+1)
918
919
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
920
def Set(self, interface_name, property_name, value):
921
"""Standard D-Bus property Set() method, see D-Bus standard.
922
"""
923
prop = self._get_dbus_property(interface_name, property_name)
924
if prop._dbus_access == "read":
925
raise DBusPropertyAccessException(property_name)
926
if prop._dbus_get_args_options["byte_arrays"]:
927
# The byte_arrays option is not supported yet on
928
# signatures other than "ay".
929
if prop._dbus_signature != "ay":
930
raise ValueError
931
value = dbus.ByteArray(b''.join(chr(byte)
932
for byte in value))
933
prop(value)
934
935
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
936
out_signature="a{sv}")
937
def GetAll(self, interface_name):
938
"""Standard D-Bus property GetAll() method, see D-Bus
939
standard.
940
941
Note: Will not include properties with access="write".
942
"""
943
properties = {}
944
for name, prop in self._get_all_dbus_things("property"):
945
if (interface_name
946
and interface_name != prop._dbus_interface):
947
# Interface non-empty but did not match
948
continue
949
# Ignore write-only properties
950
if prop._dbus_access == "write":
951
continue
952
value = prop()
953
if not hasattr(value, "variant_level"):
954
properties[name] = value
955
continue
956
properties[name] = type(value)(value, variant_level=
957
value.variant_level+1)
958
return dbus.Dictionary(properties, signature="sv")
959
960
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
961
out_signature="s",
962
path_keyword='object_path',
963
connection_keyword='connection')
964
def Introspect(self, object_path, connection):
965
"""Overloading of standard D-Bus method.
966
967
Inserts property tags and interface annotation tags.
968
"""
969
xmlstring = dbus.service.Object.Introspect(self, object_path,
970
connection)
971
try:
972
document = xml.dom.minidom.parseString(xmlstring)
973
def make_tag(document, name, prop):
974
e = document.createElement("property")
975
e.setAttribute("name", name)
976
e.setAttribute("type", prop._dbus_signature)
977
e.setAttribute("access", prop._dbus_access)
978
return e
979
for if_tag in document.getElementsByTagName("interface"):
980
# Add property tags
981
for tag in (make_tag(document, name, prop)
982
for name, prop
983
in self._get_all_dbus_things("property")
984
if prop._dbus_interface
985
== if_tag.getAttribute("name")):
986
if_tag.appendChild(tag)
987
# Add annotation tags
988
for typ in ("method", "signal", "property"):
989
for tag in if_tag.getElementsByTagName(typ):
990
annots = dict()
991
for name, prop in (self.
992
_get_all_dbus_things(typ)):
993
if (name == tag.getAttribute("name")
994
and prop._dbus_interface
995
== if_tag.getAttribute("name")):
996
annots.update(getattr
997
(prop,
998
"_dbus_annotations",
999
{}))
1000
for name, value in annots.iteritems():
1001
ann_tag = document.createElement(
1002
"annotation")
1003
ann_tag.setAttribute("name", name)
1004
ann_tag.setAttribute("value", value)
1005
tag.appendChild(ann_tag)
1006
# Add interface annotation tags
1007
for annotation, value in dict(
1008
itertools.chain.from_iterable(
1009
annotations().iteritems()
1010
for name, annotations in
1011
self._get_all_dbus_things("interface")
1012
if name == if_tag.getAttribute("name")
1013
)).iteritems():
1014
ann_tag = document.createElement("annotation")
1015
ann_tag.setAttribute("name", annotation)
1016
ann_tag.setAttribute("value", value)
1017
if_tag.appendChild(ann_tag)
1018
# Add the names to the return values for the
1019
# "org.freedesktop.DBus.Properties" methods
1020
if (if_tag.getAttribute("name")
1021
== "org.freedesktop.DBus.Properties"):
1022
for cn in if_tag.getElementsByTagName("method"):
1023
if cn.getAttribute("name") == "Get":
1024
for arg in cn.getElementsByTagName("arg"):
1025
if (arg.getAttribute("direction")
1026
== "out"):
1027
arg.setAttribute("name", "value")
1028
elif cn.getAttribute("name") == "GetAll":
1029
for arg in cn.getElementsByTagName("arg"):
1030
if (arg.getAttribute("direction")
1031
== "out"):
1032
arg.setAttribute("name", "props")
1033
xmlstring = document.toxml("utf-8")
1034
document.unlink()
1035
except (AttributeError, xml.dom.DOMException,
1036
xml.parsers.expat.ExpatError) as error:
1037
logger.error("Failed to override Introspection method",
1038
exc_info=error)
1039
return xmlstring
1040
1041
1042
def datetime_to_dbus(dt, variant_level=0):
1043
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1044
if dt is None:
1045
return dbus.String("", variant_level = variant_level)
1046
return dbus.String(dt.isoformat(),
1047
variant_level=variant_level)
1048
1049
1050
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1051
"""A class decorator; applied to a subclass of
1052
dbus.service.Object, it will add alternate D-Bus attributes with
1053
interface names according to the "alt_interface_names" mapping.
1054
Usage:
1055
1056
@alternate_dbus_interfaces({"org.example.Interface":
1057
"net.example.AlternateInterface"})
1058
class SampleDBusObject(dbus.service.Object):
1059
@dbus.service.method("org.example.Interface")
1060
def SampleDBusMethod():
1061
pass
1062
1063
The above "SampleDBusMethod" on "SampleDBusObject" will be
1064
reachable via two interfaces: "org.example.Interface" and
1065
"net.example.AlternateInterface", the latter of which will have
1066
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1067
"true", unless "deprecate" is passed with a False value.
1068
1069
This works for methods and signals, and also for D-Bus properties
1070
(from DBusObjectWithProperties) and interfaces (from the
1071
dbus_interface_annotations decorator).
1072
"""
1073
def wrapper(cls):
1074
for orig_interface_name, alt_interface_name in (
1075
alt_interface_names.iteritems()):
1076
attr = {}
1077
interface_names = set()
1078
# Go though all attributes of the class
1079
for attrname, attribute in inspect.getmembers(cls):
1080
# Ignore non-D-Bus attributes, and D-Bus attributes
1081
# with the wrong interface name
1082
if (not hasattr(attribute, "_dbus_interface")
1083
or not attribute._dbus_interface
1084
.startswith(orig_interface_name)):
1085
continue
1086
# Create an alternate D-Bus interface name based on
1087
# the current name
1088
alt_interface = (attribute._dbus_interface
1089
.replace(orig_interface_name,
1090
alt_interface_name))
1091
interface_names.add(alt_interface)
1092
# Is this a D-Bus signal?
1093
if getattr(attribute, "_dbus_is_signal", False):
1094
# Extract the original non-method undecorated
1095
# function by black magic
1096
nonmethod_func = (dict(
1097
zip(attribute.func_code.co_freevars,
1098
attribute.__closure__))["func"]
1099
.cell_contents)
1100
# Create a new, but exactly alike, function
1101
# object, and decorate it to be a new D-Bus signal
1102
# with the alternate D-Bus interface name
1103
new_function = (dbus.service.signal
1104
(alt_interface,
1105
attribute._dbus_signature)
1106
(types.FunctionType(
1107
nonmethod_func.func_code,
1108
nonmethod_func.func_globals,
1109
nonmethod_func.func_name,
1110
nonmethod_func.func_defaults,
1111
nonmethod_func.func_closure)))
1112
# Copy annotations, if any
1113
try:
1114
new_function._dbus_annotations = (
1115
dict(attribute._dbus_annotations))
1116
except AttributeError:
1117
pass
1118
# Define a creator of a function to call both the
1119
# original and alternate functions, so both the
1120
# original and alternate signals gets sent when
1121
# the function is called
1122
def fixscope(func1, func2):
1123
"""This function is a scope container to pass
1124
func1 and func2 to the "call_both" function
1125
outside of its arguments"""
1126
def call_both(*args, **kwargs):
1127
"""This function will emit two D-Bus
1128
signals by calling func1 and func2"""
1129
func1(*args, **kwargs)
1130
func2(*args, **kwargs)
1131
return call_both
1132
# Create the "call_both" function and add it to
1133
# the class
1134
attr[attrname] = fixscope(attribute, new_function)
1135
# Is this a D-Bus method?
1136
elif getattr(attribute, "_dbus_is_method", False):
1137
# Create a new, but exactly alike, function
1138
# object. Decorate it to be a new D-Bus method
1139
# with the alternate D-Bus interface name. Add it
1140
# to the class.
1141
attr[attrname] = (dbus.service.method
1142
(alt_interface,
1143
attribute._dbus_in_signature,
1144
attribute._dbus_out_signature)
1145
(types.FunctionType
1146
(attribute.func_code,
1147
attribute.func_globals,
1148
attribute.func_name,
1149
attribute.func_defaults,
1150
attribute.func_closure)))
1151
# Copy annotations, if any
1152
try:
1153
attr[attrname]._dbus_annotations = (
1154
dict(attribute._dbus_annotations))
1155
except AttributeError:
1156
pass
1157
# Is this a D-Bus property?
1158
elif getattr(attribute, "_dbus_is_property", False):
1159
# Create a new, but exactly alike, function
1160
# object, and decorate it to be a new D-Bus
1161
# property with the alternate D-Bus interface
1162
# name. Add it to the class.
1163
attr[attrname] = (dbus_service_property
1164
(alt_interface,
1165
attribute._dbus_signature,
1166
attribute._dbus_access,
1167
attribute
1168
._dbus_get_args_options
1169
["byte_arrays"])
1170
(types.FunctionType
1171
(attribute.func_code,
1172
attribute.func_globals,
1173
attribute.func_name,
1174
attribute.func_defaults,
1175
attribute.func_closure)))
1176
# Copy annotations, if any
1177
try:
1178
attr[attrname]._dbus_annotations = (
1179
dict(attribute._dbus_annotations))
1180
except AttributeError:
1181
pass
1182
# Is this a D-Bus interface?
1183
elif getattr(attribute, "_dbus_is_interface", False):
1184
# Create a new, but exactly alike, function
1185
# object. Decorate it to be a new D-Bus interface
1186
# with the alternate D-Bus interface name. Add it
1187
# to the class.
1188
attr[attrname] = (dbus_interface_annotations
1189
(alt_interface)
1190
(types.FunctionType
1191
(attribute.func_code,
1192
attribute.func_globals,
1193
attribute.func_name,
1194
attribute.func_defaults,
1195
attribute.func_closure)))
1196
if deprecate:
1197
# Deprecate all alternate interfaces
1198
iname="_AlternateDBusNames_interface_annotation{0}"
1199
for interface_name in interface_names:
1200
@dbus_interface_annotations(interface_name)
1201
def func(self):
1202
return { "org.freedesktop.DBus.Deprecated":
1203
"true" }
1204
# Find an unused name
1205
for aname in (iname.format(i)
1206
for i in itertools.count()):
1207
if aname not in attr:
1208
attr[aname] = func
1209
break
1210
if interface_names:
1211
# Replace the class with a new subclass of it with
1212
# methods, signals, etc. as created above.
1213
cls = type(b"{0}Alternate".format(cls.__name__),
1214
(cls,), attr)
1215
return cls
1216
return wrapper
1217
1218
1219
@alternate_dbus_interfaces({"se.recompile.Mandos":
1220
"se.bsnet.fukt.Mandos"})
1221
class ClientDBus(Client, DBusObjectWithProperties):
1222
"""A Client class using D-Bus
1223
1224
Attributes:
1225
dbus_object_path: dbus.ObjectPath
1226
bus: dbus.SystemBus()
1227
"""
1228
1229
runtime_expansions = (Client.runtime_expansions
1230
+ ("dbus_object_path",))
1231
1232
# dbus.service.Object doesn't use super(), so we can't either.
1233
1234
def __init__(self, bus = None, *args, **kwargs):
1235
self.bus = bus
1236
Client.__init__(self, *args, **kwargs)
1237
# Only now, when this client is initialized, can it show up on
1238
# the D-Bus
1239
client_object_name = unicode(self.name).translate(
1240
{ord("."): ord("_"),
1241
ord("-"): ord("_")})
1242
self.dbus_object_path = (dbus.ObjectPath
1243
("/clients/" + client_object_name))
1244
DBusObjectWithProperties.__init__(self, self.bus,
1245
self.dbus_object_path)
1246
1247
def notifychangeproperty(transform_func,
1248
dbus_name, type_func=lambda x: x,
1249
variant_level=1):
1250
""" Modify a variable so that it's a property which announces
1251
its changes to DBus.
1252
1253
transform_fun: Function that takes a value and a variant_level
1254
and transforms it to a D-Bus type.
1255
dbus_name: D-Bus name of the variable
1256
type_func: Function that transform the value before sending it
1257
to the D-Bus. Default: no transform
1258
variant_level: D-Bus variant level. Default: 1
1259
"""
1260
attrname = "_{0}".format(dbus_name)
1261
def setter(self, value):
1262
if hasattr(self, "dbus_object_path"):
1263
if (not hasattr(self, attrname) or
1264
type_func(getattr(self, attrname, None))
1265
!= type_func(value)):
1266
dbus_value = transform_func(type_func(value),
1267
variant_level
1268
=variant_level)
1269
self.PropertyChanged(dbus.String(dbus_name),
1270
dbus_value)
1271
setattr(self, attrname, value)
1272
1273
return property(lambda self: getattr(self, attrname), setter)
1274
1275
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1276
approvals_pending = notifychangeproperty(dbus.Boolean,
1277
"ApprovalPending",
1278
type_func = bool)
1279
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1280
last_enabled = notifychangeproperty(datetime_to_dbus,
1281
"LastEnabled")
1282
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1283
type_func = lambda checker:
1284
checker is not None)
1285
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1286
"LastCheckedOK")
1287
last_checker_status = notifychangeproperty(dbus.Int16,
1288
"LastCheckerStatus")
1289
last_approval_request = notifychangeproperty(
1290
datetime_to_dbus, "LastApprovalRequest")
1291
approved_by_default = notifychangeproperty(dbus.Boolean,
1292
"ApprovedByDefault")
1293
approval_delay = notifychangeproperty(dbus.UInt64,
1294
"ApprovalDelay",
1295
type_func =
1296
timedelta_to_milliseconds)
1297
approval_duration = notifychangeproperty(
1298
dbus.UInt64, "ApprovalDuration",
1299
type_func = timedelta_to_milliseconds)
1300
host = notifychangeproperty(dbus.String, "Host")
1301
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1302
type_func =
1303
timedelta_to_milliseconds)
1304
extended_timeout = notifychangeproperty(
1305
dbus.UInt64, "ExtendedTimeout",
1306
type_func = timedelta_to_milliseconds)
1307
interval = notifychangeproperty(dbus.UInt64,
1308
"Interval",
1309
type_func =
1310
timedelta_to_milliseconds)
1311
checker_command = notifychangeproperty(dbus.String, "Checker")
1312
1313
del notifychangeproperty
1314
1315
def __del__(self, *args, **kwargs):
1316
try:
1317
self.remove_from_connection()
1318
except LookupError:
1319
pass
1320
if hasattr(DBusObjectWithProperties, "__del__"):
1321
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1322
Client.__del__(self, *args, **kwargs)
1323
1324
def checker_callback(self, pid, condition, command,
1325
*args, **kwargs):
1326
self.checker_callback_tag = None
1327
self.checker = None
1328
if os.WIFEXITED(condition):
1329
exitstatus = os.WEXITSTATUS(condition)
1330
# Emit D-Bus signal
1331
self.CheckerCompleted(dbus.Int16(exitstatus),
1332
dbus.Int64(condition),
1333
dbus.String(command))
1334
else:
1335
# Emit D-Bus signal
1336
self.CheckerCompleted(dbus.Int16(-1),
1337
dbus.Int64(condition),
1338
dbus.String(command))
1339
1340
return Client.checker_callback(self, pid, condition, command,
1341
*args, **kwargs)
1342
1343
def start_checker(self, *args, **kwargs):
1344
old_checker = self.checker
1345
if self.checker is not None:
1346
old_checker_pid = self.checker.pid
1347
else:
1348
old_checker_pid = None
1349
r = Client.start_checker(self, *args, **kwargs)
1350
# Only if new checker process was started
1351
if (self.checker is not None
1352
and old_checker_pid != self.checker.pid):
1353
# Emit D-Bus signal
1354
self.CheckerStarted(self.current_checker_command)
1355
return r
1356
1357
def _reset_approved(self):
1358
self.approved = None
1359
return False
1360
1361
def approve(self, value=True):
1362
self.approved = value
1363
gobject.timeout_add(timedelta_to_milliseconds
1364
(self.approval_duration),
1365
self._reset_approved)
1366
self.send_changedstate()
1367
1368
## D-Bus methods, signals & properties
1369
_interface = "se.recompile.Mandos.Client"
1370
1371
## Interfaces
1372
1373
@dbus_interface_annotations(_interface)
1374
def _foo(self):
1375
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1376
"false"}
1377
1378
## Signals
479
1379
480
1380
# CheckerCompleted - signal
481
1381
@dbus.service.signal(_interface, signature="nxs")
489
1389
"D-Bus signal"
490
1390
pass
491
1391
492
# GetAllProperties - method
493
@dbus.service.method(_interface, out_signature="a{sv}")
494
def GetAllProperties(self):
495
"D-Bus method"
496
return dbus.Dictionary({
497
dbus.String("name"):
498
dbus.String(self.name, variant_level=1),
499
dbus.String("fingerprint"):
500
dbus.String(self.fingerprint, variant_level=1),
501
dbus.String("host"):
502
dbus.String(self.host, variant_level=1),
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
508
if self.last_enabled is not None
509
else dbus.Boolean(False, variant_level=1)),
510
dbus.String("enabled"):
511
dbus.Boolean(self.enabled, variant_level=1),
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
515
if self.last_checked_ok is not None
516
else dbus.Boolean (False, variant_level=1)),
517
dbus.String("timeout"):
518
dbus.UInt64(self.timeout_milliseconds(),
519
variant_level=1),
520
dbus.String("interval"):
521
dbus.UInt64(self.interval_milliseconds(),
522
variant_level=1),
523
dbus.String("checker"):
524
dbus.String(self.checker_command,
525
variant_level=1),
526
dbus.String("checker_running"):
527
dbus.Boolean(self.checker is not None,
528
variant_level=1),
529
dbus.String("object_path"):
530
dbus.ObjectPath(self.dbus_object_path,
531
variant_level=1)
532
}, signature="sv")
533
534
# IsStillValid - method
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
538
539
1392
# PropertyChanged - signal
540
1393
@dbus.service.signal(_interface, signature="sv")
541
1394
def PropertyChanged(self, property, value):
542
1395
"D-Bus signal"
543
1396
pass
544
1397
545
# SetChecker - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetChecker(self, checker):
548
"D-Bus setter method"
549
self.checker_command = checker
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"checker"),
552
dbus.String(self.checker_command,
553
variant_level=1))
554
555
# SetHost - method
556
@dbus.service.method(_interface, in_signature="s")
557
def SetHost(self, host):
558
"D-Bus setter method"
559
self.host = host
560
# Emit D-Bus signal
561
self.PropertyChanged(dbus.String(u"host"),
562
dbus.String(self.host, variant_level=1))
563
564
# SetInterval - method
565
@dbus.service.method(_interface, in_signature="t")
566
def SetInterval(self, milliseconds):
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
# Emit D-Bus signal
569
self.PropertyChanged(dbus.String(u"interval"),
570
(dbus.UInt64(self.interval_milliseconds(),
571
variant_level=1)))
572
573
# SetSecret - method
574
@dbus.service.method(_interface, in_signature="ay",
575
byte_arrays=True)
576
def SetSecret(self, secret):
577
"D-Bus setter method"
578
self.secret = str(secret)
579
580
# SetTimeout - method
581
@dbus.service.method(_interface, in_signature="t")
582
def SetTimeout(self, milliseconds):
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
# Emit D-Bus signal
585
self.PropertyChanged(dbus.String(u"timeout"),
586
(dbus.UInt64(self.timeout_milliseconds(),
587
variant_level=1)))
1398
# GotSecret - signal
1399
@dbus.service.signal(_interface)
1400
def GotSecret(self):
1401
"""D-Bus signal
1402
Is sent after a successful transfer of secret from the Mandos
1403
server to mandos-client
1404
"""
1405
pass
1406
1407
# Rejected - signal
1408
@dbus.service.signal(_interface, signature="s")
1409
def Rejected(self, reason):
1410
"D-Bus signal"
1411
pass
1412
1413
# NeedApproval - signal
1414
@dbus.service.signal(_interface, signature="tb")
1415
def NeedApproval(self, timeout, default):
1416
"D-Bus signal"
1417
return self.need_approval()
1418
1419
## Methods
1420
1421
# Approve - method
1422
@dbus.service.method(_interface, in_signature="b")
1423
def Approve(self, value):
1424
self.approve(value)
1425
1426
# CheckedOK - method
1427
@dbus.service.method(_interface)
1428
def CheckedOK(self):
1429
self.checked_ok()
588
1430
589
1431
# Enable - method
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
1432
@dbus.service.method(_interface)
1433
def Enable(self):
1434
"D-Bus method"
1435
self.enable()
592
1436
593
1437
# StartChecker - method
594
1438
@dbus.service.method(_interface)
603
1447
self.disable()
604
1448
605
1449
# StopChecker - method
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
1450
@dbus.service.method(_interface)
1451
def StopChecker(self):
1452
self.stop_checker()
1453
1454
## Properties
1455
1456
# ApprovalPending - property
1457
@dbus_service_property(_interface, signature="b", access="read")
1458
def ApprovalPending_dbus_property(self):
1459
return dbus.Boolean(bool(self.approvals_pending))
1460
1461
# ApprovedByDefault - property
1462
@dbus_service_property(_interface, signature="b",
1463
access="readwrite")
1464
def ApprovedByDefault_dbus_property(self, value=None):
1465
if value is None: # get
1466
return dbus.Boolean(self.approved_by_default)
1467
self.approved_by_default = bool(value)
1468
1469
# ApprovalDelay - property
1470
@dbus_service_property(_interface, signature="t",
1471
access="readwrite")
1472
def ApprovalDelay_dbus_property(self, value=None):
1473
if value is None: # get
1474
return dbus.UInt64(self.approval_delay_milliseconds())
1475
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1476
1477
# ApprovalDuration - property
1478
@dbus_service_property(_interface, signature="t",
1479
access="readwrite")
1480
def ApprovalDuration_dbus_property(self, value=None):
1481
if value is None: # get
1482
return dbus.UInt64(timedelta_to_milliseconds(
1483
self.approval_duration))
1484
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1485
1486
# Name - property
1487
@dbus_service_property(_interface, signature="s", access="read")
1488
def Name_dbus_property(self):
1489
return dbus.String(self.name)
1490
1491
# Fingerprint - property
1492
@dbus_service_property(_interface, signature="s", access="read")
1493
def Fingerprint_dbus_property(self):
1494
return dbus.String(self.fingerprint)
1495
1496
# Host - property
1497
@dbus_service_property(_interface, signature="s",
1498
access="readwrite")
1499
def Host_dbus_property(self, value=None):
1500
if value is None: # get
1501
return dbus.String(self.host)
1502
self.host = unicode(value)
1503
1504
# Created - property
1505
@dbus_service_property(_interface, signature="s", access="read")
1506
def Created_dbus_property(self):
1507
return datetime_to_dbus(self.created)
1508
1509
# LastEnabled - property
1510
@dbus_service_property(_interface, signature="s", access="read")
1511
def LastEnabled_dbus_property(self):
1512
return datetime_to_dbus(self.last_enabled)
1513
1514
# Enabled - property
1515
@dbus_service_property(_interface, signature="b",
1516
access="readwrite")
1517
def Enabled_dbus_property(self, value=None):
1518
if value is None: # get
1519
return dbus.Boolean(self.enabled)
1520
if value:
1521
self.enable()
1522
else:
1523
self.disable()
1524
1525
# LastCheckedOK - property
1526
@dbus_service_property(_interface, signature="s",
1527
access="readwrite")
1528
def LastCheckedOK_dbus_property(self, value=None):
1529
if value is not None:
1530
self.checked_ok()
1531
return
1532
return datetime_to_dbus(self.last_checked_ok)
1533
1534
# LastCheckerStatus - property
1535
@dbus_service_property(_interface, signature="n",
1536
access="read")
1537
def LastCheckerStatus_dbus_property(self):
1538
return dbus.Int16(self.last_checker_status)
1539
1540
# Expires - property
1541
@dbus_service_property(_interface, signature="s", access="read")
1542
def Expires_dbus_property(self):
1543
return datetime_to_dbus(self.expires)
1544
1545
# LastApprovalRequest - property
1546
@dbus_service_property(_interface, signature="s", access="read")
1547
def LastApprovalRequest_dbus_property(self):
1548
return datetime_to_dbus(self.last_approval_request)
1549
1550
# Timeout - property
1551
@dbus_service_property(_interface, signature="t",
1552
access="readwrite")
1553
def Timeout_dbus_property(self, value=None):
1554
if value is None: # get
1555
return dbus.UInt64(self.timeout_milliseconds())
1556
old_timeout = self.timeout
1557
self.timeout = datetime.timedelta(0, 0, 0, value)
1558
# Reschedule disabling
1559
if self.enabled:
1560
now = datetime.datetime.utcnow()
1561
self.expires += self.timeout - old_timeout
1562
if self.expires <= now:
1563
# The timeout has passed
1564
self.disable()
1565
else:
1566
if (getattr(self, "disable_initiator_tag", None)
1567
is None):
1568
return
1569
gobject.source_remove(self.disable_initiator_tag)
1570
self.disable_initiator_tag = (
1571
gobject.timeout_add(
1572
timedelta_to_milliseconds(self.expires - now),
1573
self.disable))
1574
1575
# ExtendedTimeout - property
1576
@dbus_service_property(_interface, signature="t",
1577
access="readwrite")
1578
def ExtendedTimeout_dbus_property(self, value=None):
1579
if value is None: # get
1580
return dbus.UInt64(self.extended_timeout_milliseconds())
1581
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1582
1583
# Interval - property
1584
@dbus_service_property(_interface, signature="t",
1585
access="readwrite")
1586
def Interval_dbus_property(self, value=None):
1587
if value is None: # get
1588
return dbus.UInt64(self.interval_milliseconds())
1589
self.interval = datetime.timedelta(0, 0, 0, value)
1590
if getattr(self, "checker_initiator_tag", None) is None:
1591
return
1592
if self.enabled:
1593
# Reschedule checker run
1594
gobject.source_remove(self.checker_initiator_tag)
1595
self.checker_initiator_tag = (gobject.timeout_add
1596
(value, self.start_checker))
1597
self.start_checker() # Start one now, too
1598
1599
# Checker - property
1600
@dbus_service_property(_interface, signature="s",
1601
access="readwrite")
1602
def Checker_dbus_property(self, value=None):
1603
if value is None: # get
1604
return dbus.String(self.checker_command)
1605
self.checker_command = unicode(value)
1606
1607
# CheckerRunning - property
1608
@dbus_service_property(_interface, signature="b",
1609
access="readwrite")
1610
def CheckerRunning_dbus_property(self, value=None):
1611
if value is None: # get
1612
return dbus.Boolean(self.checker is not None)
1613
if value:
1614
self.start_checker()
1615
else:
1616
self.stop_checker()
1617
1618
# ObjectPath - property
1619
@dbus_service_property(_interface, signature="o", access="read")
1620
def ObjectPath_dbus_property(self):
1621
return self.dbus_object_path # is already a dbus.ObjectPath
1622
1623
# Secret = property
1624
@dbus_service_property(_interface, signature="ay",
1625
access="write", byte_arrays=True)
1626
def Secret_dbus_property(self, value):
1627
self.secret = str(value)
608
1628
609
1629
del _interface
610
1630
611
1631
612
def peer_certificate(session):
613
"Return the peer's OpenPGP certificate as a bytestring"
614
# If not an OpenPGP certificate...
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
618
# ...do the normal thing
619
return session.peer_certificate
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
627
if list_size.value == 0:
628
return None
629
cert = cert_list[0]
630
return ctypes.string_at(cert.data, cert.size)
631
632
633
def fingerprint(openpgp):
634
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
641
# New empty GnuTLS certificate
642
crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
(gnutls.library.functions
644
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
645
# Import the OpenPGP public key into the certificate
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
650
# Verify the self signature in the key
651
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
if crtverify.value != 0:
655
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
raise gnutls.errors.CertificateSecurityError("Verify failed")
657
# New buffer for the fingerprint
658
buf = ctypes.create_string_buffer(20)
659
buf_len = ctypes.c_size_t()
660
# Get the fingerprint from the certificate into the buffer
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
664
# Deinit the certificate
665
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
# Convert the buffer to a Python bytestring
667
fpr = ctypes.string_at(buf, buf_len.value)
668
# Convert the bytestring to hexadecimal notation
669
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
return hex_fpr
671
672
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
674
"""A TCP request handler class.
675
Instantiated by IPv6_TCPServer for each request to handle it.
1632
class ProxyClient(object):
1633
def __init__(self, child_pipe, fpr, address):
1634
self._pipe = child_pipe
1635
self._pipe.send(('init', fpr, address))
1636
if not self._pipe.recv():
1637
raise KeyError()
1638
1639
def __getattribute__(self, name):
1640
if name == '_pipe':
1641
return super(ProxyClient, self).__getattribute__(name)
1642
self._pipe.send(('getattr', name))
1643
data = self._pipe.recv()
1644
if data[0] == 'data':
1645
return data[1]
1646
if data[0] == 'function':
1647
def func(*args, **kwargs):
1648
self._pipe.send(('funcall', name, args, kwargs))
1649
return self._pipe.recv()[1]
1650
return func
1651
1652
def __setattr__(self, name, value):
1653
if name == '_pipe':
1654
return super(ProxyClient, self).__setattr__(name, value)
1655
self._pipe.send(('setattr', name, value))
1656
1657
1658
class ClientHandler(socketserver.BaseRequestHandler, object):
1659
"""A class to handle client connections.
1660
1661
Instantiated once for each connection to handle it.
676
1662
Note: This will run in its own forked process."""
677
1663
678
1664
def handle(self):
679
logger.info(u"TCP connection from: %s",
680
unicode(self.client_address))
681
session = (gnutls.connection
682
.ClientSession(self.request,
683
gnutls.connection
684
.X509Credentials()))
685
686
line = self.request.makefile().readline()
687
logger.debug(u"Protocol version: %r", line)
688
try:
689
if int(line.strip().split()[0]) > 1:
690
raise RuntimeError
691
except (ValueError, IndexError, RuntimeError), error:
692
logger.error(u"Unknown protocol version: %s", error)
693
return
694
695
# Note: gnutls.connection.X509Credentials is really a generic
696
# GnuTLS certificate credentials object so long as no X.509
697
# keys are added to it. Therefore, we can use it here despite
698
# using OpenPGP certificates.
699
700
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
# "+DHE-DSS"))
703
# Use a fallback default, since this MUST be set.
704
priority = self.server.settings.get("priority", "NORMAL")
705
(gnutls.library.functions
706
.gnutls_priority_set_direct(session._c_object,
707
priority, None))
708
709
try:
710
session.handshake()
711
except gnutls.errors.GNUTLSError, error:
712
logger.warning(u"Handshake failed: %s", error)
713
# Do not run session.bye() here: the session is not
714
# established. Just abandon the request.
715
return
716
logger.debug(u"Handshake succeeded")
717
try:
718
fpr = fingerprint(peer_certificate(session))
719
except (TypeError, gnutls.errors.GNUTLSError), error:
720
logger.warning(u"Bad certificate: %s", error)
721
session.bye()
722
return
723
logger.debug(u"Fingerprint: %s", fpr)
724
725
for c in self.server.clients:
726
if c.fingerprint == fpr:
727
client = c
728
break
729
else:
730
logger.warning(u"Client not found for fingerprint: %s",
731
fpr)
732
session.bye()
733
return
734
# Have to check if client.still_valid(), since it is possible
735
# that the client timed out while establishing the GnuTLS
736
# session.
737
if not client.still_valid():
738
logger.warning(u"Client %(name)s is invalid",
739
vars(client))
740
session.bye()
741
return
742
## This won't work here, since we're in a fork.
743
# client.checked_ok()
744
sent_size = 0
745
while sent_size < len(client.secret):
746
sent = session.send(client.secret[sent_size:])
747
logger.debug(u"Sent: %d, remaining: %d",
748
sent, len(client.secret)
749
- (sent_size + sent))
750
sent_size += sent
751
session.bye()
752
753
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
SocketServer.TCPServer, object):
1665
with contextlib.closing(self.server.child_pipe) as child_pipe:
1666
logger.info("TCP connection from: %s",
1667
unicode(self.client_address))
1668
logger.debug("Pipe FD: %d",
1669
self.server.child_pipe.fileno())
1670
1671
session = (gnutls.connection
1672
.ClientSession(self.request,
1673
gnutls.connection
1674
.X509Credentials()))
1675
1676
# Note: gnutls.connection.X509Credentials is really a
1677
# generic GnuTLS certificate credentials object so long as
1678
# no X.509 keys are added to it. Therefore, we can use it
1679
# here despite using OpenPGP certificates.
1680
1681
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1682
# "+AES-256-CBC", "+SHA1",
1683
# "+COMP-NULL", "+CTYPE-OPENPGP",
1684
# "+DHE-DSS"))
1685
# Use a fallback default, since this MUST be set.
1686
priority = self.server.gnutls_priority
1687
if priority is None:
1688
priority = "NORMAL"
1689
(gnutls.library.functions
1690
.gnutls_priority_set_direct(session._c_object,
1691
priority, None))
1692
1693
# Start communication using the Mandos protocol
1694
# Get protocol number
1695
line = self.request.makefile().readline()
1696
logger.debug("Protocol version: %r", line)
1697
try:
1698
if int(line.strip().split()[0]) > 1:
1699
raise RuntimeError
1700
except (ValueError, IndexError, RuntimeError) as error:
1701
logger.error("Unknown protocol version: %s", error)
1702
return
1703
1704
# Start GnuTLS connection
1705
try:
1706
session.handshake()
1707
except gnutls.errors.GNUTLSError as error:
1708
logger.warning("Handshake failed: %s", error)
1709
# Do not run session.bye() here: the session is not
1710
# established. Just abandon the request.
1711
return
1712
logger.debug("Handshake succeeded")
1713
1714
approval_required = False
1715
try:
1716
try:
1717
fpr = self.fingerprint(self.peer_certificate
1718
(session))
1719
except (TypeError,
1720
gnutls.errors.GNUTLSError) as error:
1721
logger.warning("Bad certificate: %s", error)
1722
return
1723
logger.debug("Fingerprint: %s", fpr)
1724
1725
try:
1726
client = ProxyClient(child_pipe, fpr,
1727
self.client_address)
1728
except KeyError:
1729
return
1730
1731
if client.approval_delay:
1732
delay = client.approval_delay
1733
client.approvals_pending += 1
1734
approval_required = True
1735
1736
while True:
1737
if not client.enabled:
1738
logger.info("Client %s is disabled",
1739
client.name)
1740
if self.server.use_dbus:
1741
# Emit D-Bus signal
1742
client.Rejected("Disabled")
1743
return
1744
1745
if client.approved or not client.approval_delay:
1746
#We are approved or approval is disabled
1747
break
1748
elif client.approved is None:
1749
logger.info("Client %s needs approval",
1750
client.name)
1751
if self.server.use_dbus:
1752
# Emit D-Bus signal
1753
client.NeedApproval(
1754
client.approval_delay_milliseconds(),
1755
client.approved_by_default)
1756
else:
1757
logger.warning("Client %s was not approved",
1758
client.name)
1759
if self.server.use_dbus:
1760
# Emit D-Bus signal
1761
client.Rejected("Denied")
1762
return
1763
1764
#wait until timeout or approved
1765
time = datetime.datetime.now()
1766
client.changedstate.acquire()
1767
client.changedstate.wait(
1768
float(timedelta_to_milliseconds(delay)
1769
/ 1000))
1770
client.changedstate.release()
1771
time2 = datetime.datetime.now()
1772
if (time2 - time) >= delay:
1773
if not client.approved_by_default:
1774
logger.warning("Client %s timed out while"
1775
" waiting for approval",
1776
client.name)
1777
if self.server.use_dbus:
1778
# Emit D-Bus signal
1779
client.Rejected("Approval timed out")
1780
return
1781
else:
1782
break
1783
else:
1784
delay -= time2 - time
1785
1786
sent_size = 0
1787
while sent_size < len(client.secret):
1788
try:
1789
sent = session.send(client.secret[sent_size:])
1790
except gnutls.errors.GNUTLSError as error:
1791
logger.warning("gnutls send failed",
1792
exc_info=error)
1793
return
1794
logger.debug("Sent: %d, remaining: %d",
1795
sent, len(client.secret)
1796
- (sent_size + sent))
1797
sent_size += sent
1798
1799
logger.info("Sending secret to %s", client.name)
1800
# bump the timeout using extended_timeout
1801
client.bump_timeout(client.extended_timeout)
1802
if self.server.use_dbus:
1803
# Emit D-Bus signal
1804
client.GotSecret()
1805
1806
finally:
1807
if approval_required:
1808
client.approvals_pending -= 1
1809
try:
1810
session.bye()
1811
except gnutls.errors.GNUTLSError as error:
1812
logger.warning("GnuTLS bye failed",
1813
exc_info=error)
1814
1815
@staticmethod
1816
def peer_certificate(session):
1817
"Return the peer's OpenPGP certificate as a bytestring"
1818
# If not an OpenPGP certificate...
1819
if (gnutls.library.functions
1820
.gnutls_certificate_type_get(session._c_object)
1821
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1822
# ...do the normal thing
1823
return session.peer_certificate
1824
list_size = ctypes.c_uint(1)
1825
cert_list = (gnutls.library.functions
1826
.gnutls_certificate_get_peers
1827
(session._c_object, ctypes.byref(list_size)))
1828
if not bool(cert_list) and list_size.value != 0:
1829
raise gnutls.errors.GNUTLSError("error getting peer"
1830
" certificate")
1831
if list_size.value == 0:
1832
return None
1833
cert = cert_list[0]
1834
return ctypes.string_at(cert.data, cert.size)
1835
1836
@staticmethod
1837
def fingerprint(openpgp):
1838
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1839
# New GnuTLS "datum" with the OpenPGP public key
1840
datum = (gnutls.library.types
1841
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1842
ctypes.POINTER
1843
(ctypes.c_ubyte)),
1844
ctypes.c_uint(len(openpgp))))
1845
# New empty GnuTLS certificate
1846
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1847
(gnutls.library.functions
1848
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1849
# Import the OpenPGP public key into the certificate
1850
(gnutls.library.functions
1851
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1852
gnutls.library.constants
1853
.GNUTLS_OPENPGP_FMT_RAW))
1854
# Verify the self signature in the key
1855
crtverify = ctypes.c_uint()
1856
(gnutls.library.functions
1857
.gnutls_openpgp_crt_verify_self(crt, 0,
1858
ctypes.byref(crtverify)))
1859
if crtverify.value != 0:
1860
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1861
raise (gnutls.errors.CertificateSecurityError
1862
("Verify failed"))
1863
# New buffer for the fingerprint
1864
buf = ctypes.create_string_buffer(20)
1865
buf_len = ctypes.c_size_t()
1866
# Get the fingerprint from the certificate into the buffer
1867
(gnutls.library.functions
1868
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1869
ctypes.byref(buf_len)))
1870
# Deinit the certificate
1871
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1872
# Convert the buffer to a Python bytestring
1873
fpr = ctypes.string_at(buf, buf_len.value)
1874
# Convert the bytestring to hexadecimal notation
1875
hex_fpr = binascii.hexlify(fpr).upper()
1876
return hex_fpr
1877
1878
1879
class MultiprocessingMixIn(object):
1880
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1881
def sub_process_main(self, request, address):
1882
try:
1883
self.finish_request(request, address)
1884
except Exception:
1885
self.handle_error(request, address)
1886
self.close_request(request)
1887
1888
def process_request(self, request, address):
1889
"""Start a new process to process the request."""
1890
proc = multiprocessing.Process(target = self.sub_process_main,
1891
args = (request, address))
1892
proc.start()
1893
return proc
1894
1895
1896
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1897
""" adds a pipe to the MixIn """
1898
def process_request(self, request, client_address):
1899
"""Overrides and wraps the original process_request().
1900
1901
This function creates a new pipe in self.pipe
1902
"""
1903
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1904
1905
proc = MultiprocessingMixIn.process_request(self, request,
1906
client_address)
1907
self.child_pipe.close()
1908
self.add_pipe(parent_pipe, proc)
1909
1910
def add_pipe(self, parent_pipe, proc):
1911
"""Dummy function; override as necessary"""
1912
raise NotImplementedError
1913
1914
1915
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1916
socketserver.TCPServer, object):
756
1917
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1918
757
1919
Attributes:
758
settings: Server settings
759
clients: Set() of Client objects
760
1920
enabled: Boolean; whether this server is activated yet
1921
interface: None or a network interface name (string)
1922
use_ipv6: Boolean; to use IPv6 or not
761
1923
"""
762
address_family = socket.AF_INET6
763
def __init__(self, *args, **kwargs):
764
if "settings" in kwargs:
765
self.settings = kwargs["settings"]
766
del kwargs["settings"]
767
if "clients" in kwargs:
768
self.clients = kwargs["clients"]
769
del kwargs["clients"]
770
if "use_ipv6" in kwargs:
771
if not kwargs["use_ipv6"]:
772
self.address_family = socket.AF_INET
773
del kwargs["use_ipv6"]
774
self.enabled = False
775
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1924
def __init__(self, server_address, RequestHandlerClass,
1925
interface=None, use_ipv6=True, socketfd=None):
1926
"""If socketfd is set, use that file descriptor instead of
1927
creating a new one with socket.socket().
1928
"""
1929
self.interface = interface
1930
if use_ipv6:
1931
self.address_family = socket.AF_INET6
1932
if socketfd is not None:
1933
# Save the file descriptor
1934
self.socketfd = socketfd
1935
# Save the original socket.socket() function
1936
self.socket_socket = socket.socket
1937
# To implement --socket, we monkey patch socket.socket.
1938
#
1939
# (When socketserver.TCPServer is a new-style class, we
1940
# could make self.socket into a property instead of monkey
1941
# patching socket.socket.)
1942
#
1943
# Create a one-time-only replacement for socket.socket()
1944
@functools.wraps(socket.socket)
1945
def socket_wrapper(*args, **kwargs):
1946
# Restore original function so subsequent calls are
1947
# not affected.
1948
socket.socket = self.socket_socket
1949
del self.socket_socket
1950
# This time only, return a new socket object from the
1951
# saved file descriptor.
1952
return socket.fromfd(self.socketfd, *args, **kwargs)
1953
# Replace socket.socket() function with wrapper
1954
socket.socket = socket_wrapper
1955
# The socketserver.TCPServer.__init__ will call
1956
# socket.socket(), which might be our replacement,
1957
# socket_wrapper(), if socketfd was set.
1958
socketserver.TCPServer.__init__(self, server_address,
1959
RequestHandlerClass)
1960
776
1961
def server_bind(self):
777
1962
"""This overrides the normal server_bind() function
778
1963
to bind to an interface if one was specified, and also NOT to
779
1964
bind to an address or port if they were not specified."""
780
if self.settings["interface"]:
781
# 25 is from /usr/include/asm-i486/socket.h
782
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
783
try:
784
self.socket.setsockopt(socket.SOL_SOCKET,
785
SO_BINDTODEVICE,
786
self.settings["interface"])
787
except socket.error, error:
788
if error[0] == errno.EPERM:
789
logger.error(u"No permission to"
790
u" bind to interface %s",
791
self.settings["interface"])
792
else:
793
raise
1965
if self.interface is not None:
1966
if SO_BINDTODEVICE is None:
1967
logger.error("SO_BINDTODEVICE does not exist;"
1968
" cannot bind to interface %s",
1969
self.interface)
1970
else:
1971
try:
1972
self.socket.setsockopt(socket.SOL_SOCKET,
1973
SO_BINDTODEVICE,
1974
str(self.interface + '\0'))
1975
except socket.error as error:
1976
if error.errno == errno.EPERM:
1977
logger.error("No permission to bind to"
1978
" interface %s", self.interface)
1979
elif error.errno == errno.ENOPROTOOPT:
1980
logger.error("SO_BINDTODEVICE not available;"
1981
" cannot bind to interface %s",
1982
self.interface)
1983
elif error.errno == errno.ENODEV:
1984
logger.error("Interface %s does not exist,"
1985
" cannot bind", self.interface)
1986
else:
1987
raise
794
1988
# Only bind(2) the socket if we really need to.
795
1989
if self.server_address[0] or self.server_address[1]:
796
1990
if not self.server_address[0]:
797
1991
if self.address_family == socket.AF_INET6:
798
1992
any_address = "::" # in6addr_any
799
1993
else:
800
any_address = socket.INADDR_ANY
1994
any_address = "0.0.0.0" # INADDR_ANY
801
1995
self.server_address = (any_address,
802
1996
self.server_address[1])
803
1997
elif not self.server_address[1]:
804
1998
self.server_address = (self.server_address[0],
805
1999
0)
806
# if self.settings["interface"]:
2000
# if self.interface:
807
2001
# self.server_address = (self.server_address[0],
808
2002
# 0, # port
809
2003
# 0, # flowinfo
810
2004
# if_nametoindex
811
# (self.settings
812
# ["interface"]))
813
return super(IPv6_TCPServer, self).server_bind()
2005
# (self.interface))
2006
return socketserver.TCPServer.server_bind(self)
2007
2008
2009
class MandosServer(IPv6_TCPServer):
2010
"""Mandos server.
2011
2012
Attributes:
2013
clients: set of Client objects
2014
gnutls_priority GnuTLS priority string
2015
use_dbus: Boolean; to emit D-Bus signals or not
2016
2017
Assumes a gobject.MainLoop event loop.
2018
"""
2019
def __init__(self, server_address, RequestHandlerClass,
2020
interface=None, use_ipv6=True, clients=None,
2021
gnutls_priority=None, use_dbus=True, socketfd=None):
2022
self.enabled = False
2023
self.clients = clients
2024
if self.clients is None:
2025
self.clients = {}
2026
self.use_dbus = use_dbus
2027
self.gnutls_priority = gnutls_priority
2028
IPv6_TCPServer.__init__(self, server_address,
2029
RequestHandlerClass,
2030
interface = interface,
2031
use_ipv6 = use_ipv6,
2032
socketfd = socketfd)
814
2033
def server_activate(self):
815
2034
if self.enabled:
816
return super(IPv6_TCPServer, self).server_activate()
2035
return socketserver.TCPServer.server_activate(self)
2036
817
2037
def enable(self):
818
2038
self.enabled = True
2039
2040
def add_pipe(self, parent_pipe, proc):
2041
# Call "handle_ipc" for both data and EOF events
2042
gobject.io_add_watch(parent_pipe.fileno(),
2043
gobject.IO_IN | gobject.IO_HUP,
2044
functools.partial(self.handle_ipc,
2045
parent_pipe =
2046
parent_pipe,
2047
proc = proc))
2048
2049
def handle_ipc(self, source, condition, parent_pipe=None,
2050
proc = None, client_object=None):
2051
# error, or the other end of multiprocessing.Pipe has closed
2052
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2053
# Wait for other process to exit
2054
proc.join()
2055
return False
2056
2057
# Read a request from the child
2058
request = parent_pipe.recv()
2059
command = request[0]
2060
2061
if command == 'init':
2062
fpr = request[1]
2063
address = request[2]
2064
2065
for c in self.clients.itervalues():
2066
if c.fingerprint == fpr:
2067
client = c
2068
break
2069
else:
2070
logger.info("Client not found for fingerprint: %s, ad"
2071
"dress: %s", fpr, address)
2072
if self.use_dbus:
2073
# Emit D-Bus signal
2074
mandos_dbus_service.ClientNotFound(fpr,
2075
address[0])
2076
parent_pipe.send(False)
2077
return False
2078
2079
gobject.io_add_watch(parent_pipe.fileno(),
2080
gobject.IO_IN | gobject.IO_HUP,
2081
functools.partial(self.handle_ipc,
2082
parent_pipe =
2083
parent_pipe,
2084
proc = proc,
2085
client_object =
2086
client))
2087
parent_pipe.send(True)
2088
# remove the old hook in favor of the new above hook on
2089
# same fileno
2090
return False
2091
if command == 'funcall':
2092
funcname = request[1]
2093
args = request[2]
2094
kwargs = request[3]
2095
2096
parent_pipe.send(('data', getattr(client_object,
2097
funcname)(*args,
2098
**kwargs)))
2099
2100
if command == 'getattr':
2101
attrname = request[1]
2102
if callable(client_object.__getattribute__(attrname)):
2103
parent_pipe.send(('function',))
2104
else:
2105
parent_pipe.send(('data', client_object
2106
.__getattribute__(attrname)))
2107
2108
if command == 'setattr':
2109
attrname = request[1]
2110
value = request[2]
2111
setattr(client_object, attrname, value)
2112
2113
return True
2114
2115
2116
def rfc3339_duration_to_delta(duration):
2117
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2118
2119
>>> rfc3339_duration_to_delta("P7D")
2120
datetime.timedelta(7)
2121
>>> rfc3339_duration_to_delta("PT60S")
2122
datetime.timedelta(0, 60)
2123
>>> rfc3339_duration_to_delta("PT60M")
2124
datetime.timedelta(0, 3600)
2125
>>> rfc3339_duration_to_delta("PT24H")
2126
datetime.timedelta(1)
2127
>>> rfc3339_duration_to_delta("P1W")
2128
datetime.timedelta(7)
2129
>>> rfc3339_duration_to_delta("PT5M30S")
2130
datetime.timedelta(0, 330)
2131
>>> rfc3339_duration_to_delta("P1DT3M20S")
2132
datetime.timedelta(1, 200)
2133
"""
2134
2135
# Parsing an RFC 3339 duration with regular expressions is not
2136
# possible - there would have to be multiple places for the same
2137
# values, like seconds. The current code, while more esoteric, is
2138
# cleaner without depending on a parsing library. If Python had a
2139
# built-in library for parsing we would use it, but we'd like to
2140
# avoid excessive use of external libraries.
2141
2142
# New type for defining tokens, syntax, and semantics all-in-one
2143
Token = collections.namedtuple("Token",
2144
("regexp", # To match token; if
2145
# "value" is not None,
2146
# must have a "group"
2147
# containing digits
2148
"value", # datetime.timedelta or
2149
# None
2150
"followers")) # Tokens valid after
2151
# this token
2152
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2153
# the "duration" ABNF definition in RFC 3339, Appendix A.
2154
token_end = Token(re.compile(r"$"), None, frozenset())
2155
token_second = Token(re.compile(r"(\d+)S"),
2156
datetime.timedelta(seconds=1),
2157
frozenset((token_end,)))
2158
token_minute = Token(re.compile(r"(\d+)M"),
2159
datetime.timedelta(minutes=1),
2160
frozenset((token_second, token_end)))
2161
token_hour = Token(re.compile(r"(\d+)H"),
2162
datetime.timedelta(hours=1),
2163
frozenset((token_minute, token_end)))
2164
token_time = Token(re.compile(r"T"),
2165
None,
2166
frozenset((token_hour, token_minute,
2167
token_second)))
2168
token_day = Token(re.compile(r"(\d+)D"),
2169
datetime.timedelta(days=1),
2170
frozenset((token_time, token_end)))
2171
token_month = Token(re.compile(r"(\d+)M"),
2172
datetime.timedelta(weeks=4),
2173
frozenset((token_day, token_end)))
2174
token_year = Token(re.compile(r"(\d+)Y"),
2175
datetime.timedelta(weeks=52),
2176
frozenset((token_month, token_end)))
2177
token_week = Token(re.compile(r"(\d+)W"),
2178
datetime.timedelta(weeks=1),
2179
frozenset((token_end,)))
2180
token_duration = Token(re.compile(r"P"), None,
2181
frozenset((token_year, token_month,
2182
token_day, token_time,
2183
token_week))),
2184
# Define starting values
2185
value = datetime.timedelta() # Value so far
2186
found_token = None
2187
followers = frozenset(token_duration,) # Following valid tokens
2188
s = duration # String left to parse
2189
# Loop until end token is found
2190
while found_token is not token_end:
2191
# Search for any currently valid tokens
2192
for token in followers:
2193
match = token.regexp.match(s)
2194
if match is not None:
2195
# Token found
2196
if token.value is not None:
2197
# Value found, parse digits
2198
factor = int(match.group(1), 10)
2199
# Add to value so far
2200
value += factor * token.value
2201
# Strip token from string
2202
s = token.regexp.sub("", s, 1)
2203
# Go to found token
2204
found_token = token
2205
# Set valid next tokens
2206
followers = found_token.followers
2207
break
2208
else:
2209
# No currently valid tokens were found
2210
raise ValueError("Invalid RFC 3339 duration")
2211
# End token found
2212
return value
819
2213
820
2214
821
2215
def string_to_delta(interval):
829
2223
datetime.timedelta(0, 3600)
830
2224
>>> string_to_delta('24h')
831
2225
datetime.timedelta(1)
832
>>> string_to_delta(u'1w')
2226
>>> string_to_delta('1w')
833
2227
datetime.timedelta(7)
834
2228
>>> string_to_delta('5m 30s')
835
2229
datetime.timedelta(0, 330)
836
2230
"""
2231
2232
try:
2233
return rfc3339_duration_to_delta(interval)
2234
except ValueError:
2235
pass
2236
837
2237
timevalue = datetime.timedelta(0)
838
2238
for s in interval.split():
839
2239
try:
840
2240
suffix = unicode(s[-1])
841
2241
value = int(s[:-1])
842
if suffix == u"d":
2242
if suffix == "d":
843
2243
delta = datetime.timedelta(value)
844
elif suffix == u"s":
2244
elif suffix == "s":
845
2245
delta = datetime.timedelta(0, value)
846
elif suffix == u"m":
2246
elif suffix == "m":
847
2247
delta = datetime.timedelta(0, 0, 0, 0, value)
848
elif suffix == u"h":
2248
elif suffix == "h":
849
2249
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
850
elif suffix == u"w":
2250
elif suffix == "w":
851
2251
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
852
2252
else:
853
raise ValueError
854
except (ValueError, IndexError):
855
raise ValueError
2253
raise ValueError("Unknown suffix {0!r}"
2254
.format(suffix))
2255
except (ValueError, IndexError) as e:
2256
raise ValueError(*(e.args))
856
2257
timevalue += delta
857
2258
return timevalue
858
2259
859
2260
860
def server_state_changed(state):
861
"""Derived from the Avahi example code"""
862
if state == avahi.SERVER_COLLISION:
863
logger.error(u"Zeroconf server name collision")
864
service.remove()
865
elif state == avahi.SERVER_RUNNING:
866
service.add()
867
868
869
def entry_group_state_changed(state, error):
870
"""Derived from the Avahi example code"""
871
logger.debug(u"Avahi state change: %i", state)
872
873
if state == avahi.ENTRY_GROUP_ESTABLISHED:
874
logger.debug(u"Zeroconf service established.")
875
elif state == avahi.ENTRY_GROUP_COLLISION:
876
logger.warning(u"Zeroconf service name collision.")
877
service.rename()
878
elif state == avahi.ENTRY_GROUP_FAILURE:
879
logger.critical(u"Avahi: Error in group state changed %s",
880
unicode(error))
881
raise AvahiGroupError(u"State changed: %s" % unicode(error))
882
883
def if_nametoindex(interface):
884
"""Call the C function if_nametoindex(), or equivalent"""
885
global if_nametoindex
886
try:
887
if_nametoindex = (ctypes.cdll.LoadLibrary
888
(ctypes.util.find_library("c"))
889
.if_nametoindex)
890
except (OSError, AttributeError):
891
if "struct" not in sys.modules:
892
import struct
893
if "fcntl" not in sys.modules:
894
import fcntl
895
def if_nametoindex(interface):
896
"Get an interface index the hard way, i.e. using fcntl()"
897
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
898
with closing(socket.socket()) as s:
899
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
struct.pack("16s16x", interface))
901
interface_index = struct.unpack("I", ifreq[16:20])[0]
902
return interface_index
903
return if_nametoindex(interface)
904
905
906
2261
def daemon(nochdir = False, noclose = False):
907
2262
"""See daemon(3). Standard BSD Unix function.
2263
908
2264
This should really exist as os.daemon, but it doesn't (yet)."""
909
2265
if os.fork():
910
2266
sys.exit()
915
2271
sys.exit()
916
2272
if not noclose:
917
2273
# Close all standard open file descriptors
918
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2274
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
919
2275
if not stat.S_ISCHR(os.fstat(null).st_mode):
920
2276
raise OSError(errno.ENODEV,
921
"/dev/null not a character device")
2277
"{0} not a character device"
2278
.format(os.devnull))
922
2279
os.dup2(null, sys.stdin.fileno())
923
2280
os.dup2(null, sys.stdout.fileno())
924
2281
os.dup2(null, sys.stderr.fileno())
927
2284
928
2285
929
2286
def main():
930
parser = optparse.OptionParser(version = "%%prog %s" % version)
931
parser.add_option("-i", "--interface", type="string",
932
metavar="IF", help="Bind to interface IF")
933
parser.add_option("-a", "--address", type="string",
934
help="Address to listen for requests on")
935
parser.add_option("-p", "--port", type="int",
936
help="Port number to receive requests on")
937
parser.add_option("--check", action="store_true",
938
help="Run self-test")
939
parser.add_option("--debug", action="store_true",
940
help="Debug mode; run in foreground and log to"
941
" terminal")
942
parser.add_option("--priority", type="string", help="GnuTLS"
943
" priority string (see GnuTLS documentation)")
944
parser.add_option("--servicename", type="string", metavar="NAME",
945
help="Zeroconf service name")
946
parser.add_option("--configdir", type="string",
947
default="/etc/mandos", metavar="DIR",
948
help="Directory to search for configuration"
949
" files")
950
parser.add_option("--no-dbus", action="store_false",
951
dest="use_dbus",
952
help="Do not provide D-Bus system bus"
953
" interface")
954
parser.add_option("--no-ipv6", action="store_false",
955
dest="use_ipv6", help="Do not use IPv6")
956
options = parser.parse_args()[0]
2287
2288
##################################################################
2289
# Parsing of options, both command line and config file
2290
2291
parser = argparse.ArgumentParser()
2292
parser.add_argument("-v", "--version", action="version",
2293
version = "%(prog)s {0}".format(version),
2294
help="show version number and exit")
2295
parser.add_argument("-i", "--interface", metavar="IF",
2296
help="Bind to interface IF")
2297
parser.add_argument("-a", "--address",
2298
help="Address to listen for requests on")
2299
parser.add_argument("-p", "--port", type=int,
2300
help="Port number to receive requests on")
2301
parser.add_argument("--check", action="store_true",
2302
help="Run self-test")
2303
parser.add_argument("--debug", action="store_true",
2304
help="Debug mode; run in foreground and log"
2305
" to terminal", default=None)
2306
parser.add_argument("--debuglevel", metavar="LEVEL",
2307
help="Debug level for stdout output")
2308
parser.add_argument("--priority", help="GnuTLS"
2309
" priority string (see GnuTLS documentation)")
2310
parser.add_argument("--servicename",
2311
metavar="NAME", help="Zeroconf service name")
2312
parser.add_argument("--configdir",
2313
default="/etc/mandos", metavar="DIR",
2314
help="Directory to search for configuration"
2315
" files")
2316
parser.add_argument("--no-dbus", action="store_false",
2317
dest="use_dbus", help="Do not provide D-Bus"
2318
" system bus interface", default=None)
2319
parser.add_argument("--no-ipv6", action="store_false",
2320
dest="use_ipv6", help="Do not use IPv6",
2321
default=None)
2322
parser.add_argument("--no-restore", action="store_false",
2323
dest="restore", help="Do not restore stored"
2324
" state", default=None)
2325
parser.add_argument("--socket", type=int,
2326
help="Specify a file descriptor to a network"
2327
" socket to use instead of creating one")
2328
parser.add_argument("--statedir", metavar="DIR",
2329
help="Directory to save/restore state in")
2330
parser.add_argument("--foreground", action="store_true",
2331
help="Run in foreground", default=None)
2332
2333
options = parser.parse_args()
957
2334
958
2335
if options.check:
959
2336
import doctest
966
2343
"port": "",
967
2344
"debug": "False",
968
2345
"priority":
969
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2346
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224",
970
2347
"servicename": "Mandos",
971
2348
"use_dbus": "True",
972
2349
"use_ipv6": "True",
2350
"debuglevel": "",
2351
"restore": "True",
2352
"socket": "",
2353
"statedir": "/var/lib/mandos",
2354
"foreground": "False",
973
2355
}
974
2356
975
2357
# Parse config file for server-global settings
976
server_config = ConfigParser.SafeConfigParser(server_defaults)
2358
server_config = configparser.SafeConfigParser(server_defaults)
977
2359
del server_defaults
978
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2360
server_config.read(os.path.join(options.configdir,
2361
"mandos.conf"))
979
2362
# Convert the SafeConfigParser object to a dict
980
2363
server_settings = server_config.defaults()
981
2364
# Use the appropriate methods on the non-string config options
982
server_settings["debug"] = server_config.getboolean("DEFAULT",
983
"debug")
984
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
985
"use_dbus")
986
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
987
"use_ipv6")
2365
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2366
server_settings[option] = server_config.getboolean("DEFAULT",
2367
option)
988
2368
if server_settings["port"]:
989
2369
server_settings["port"] = server_config.getint("DEFAULT",
990
2370
"port")
2371
if server_settings["socket"]:
2372
server_settings["socket"] = server_config.getint("DEFAULT",
2373
"socket")
2374
# Later, stdin will, and stdout and stderr might, be dup'ed
2375
# over with an opened os.devnull. But we don't want this to
2376
# happen with a supplied network socket.
2377
if 0 <= server_settings["socket"] <= 2:
2378
server_settings["socket"] = os.dup(server_settings
2379
["socket"])
991
2380
del server_config
992
2381
993
2382
# Override the settings from the config file with command line
994
2383
# options, if set.
995
2384
for option in ("interface", "address", "port", "debug",
996
2385
"priority", "servicename", "configdir",
997
"use_dbus", "use_ipv6"):
2386
"use_dbus", "use_ipv6", "debuglevel", "restore",
2387
"statedir", "socket", "foreground"):
998
2388
value = getattr(options, option)
999
2389
if value is not None:
1000
2390
server_settings[option] = value
1001
2391
del options
2392
# Force all strings to be unicode
2393
for option in server_settings.keys():
2394
if type(server_settings[option]) is str:
2395
server_settings[option] = unicode(server_settings[option])
2396
# Force all boolean options to be boolean
2397
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2398
"foreground"):
2399
server_settings[option] = bool(server_settings[option])
2400
# Debug implies foreground
2401
if server_settings["debug"]:
2402
server_settings["foreground"] = True
1002
2403
# Now we have our good server settings in "server_settings"
1003
2404
2405
##################################################################
2406
1004
2407
# For convenience
1005
2408
debug = server_settings["debug"]
2409
debuglevel = server_settings["debuglevel"]
1006
2410
use_dbus = server_settings["use_dbus"]
1007
2411
use_ipv6 = server_settings["use_ipv6"]
2412
stored_state_path = os.path.join(server_settings["statedir"],
2413
stored_state_file)
2414
foreground = server_settings["foreground"]
1008
2415
1009
if not debug:
1010
syslogger.setLevel(logging.WARNING)
1011
console.setLevel(logging.WARNING)
2416
if debug:
2417
initlogger(debug, logging.DEBUG)
2418
else:
2419
if not debuglevel:
2420
initlogger(debug)
2421
else:
2422
level = getattr(logging, debuglevel.upper())
2423
initlogger(debug, level)
1012
2424
1013
2425
if server_settings["servicename"] != "Mandos":
1014
2426
syslogger.setFormatter(logging.Formatter
1015
('Mandos (%s): %%(levelname)s:'
1016
' %%(message)s'
1017
% server_settings["servicename"]))
2427
('Mandos ({0}) [%(process)d]:'
2428
' %(levelname)s: %(message)s'
2429
.format(server_settings
2430
["servicename"])))
1018
2431
1019
2432
# Parse config file with clients
1020
client_defaults = { "timeout": "1h",
1021
"interval": "5m",
1022
"checker": "fping -q -- %%(host)s",
1023
"host": "",
1024
}
1025
client_config = ConfigParser.SafeConfigParser(client_defaults)
2433
client_config = configparser.SafeConfigParser(Client
2434
.client_defaults)
1026
2435
client_config.read(os.path.join(server_settings["configdir"],
1027
2436
"clients.conf"))
1028
2437
1029
clients = Set()
1030
tcp_server = IPv6_TCPServer((server_settings["address"],
1031
server_settings["port"]),
1032
TCP_handler,
1033
settings=server_settings,
1034
clients=clients, use_ipv6=use_ipv6)
1035
pidfilename = "/var/run/mandos.pid"
1036
try:
1037
pidfile = open(pidfilename, "w")
1038
except IOError:
1039
logger.error("Could not open file %r", pidfilename)
1040
1041
try:
1042
uid = pwd.getpwnam("_mandos").pw_uid
1043
gid = pwd.getpwnam("_mandos").pw_gid
1044
except KeyError:
1045
try:
1046
uid = pwd.getpwnam("mandos").pw_uid
1047
gid = pwd.getpwnam("mandos").pw_gid
2438
global mandos_dbus_service
2439
mandos_dbus_service = None
2440
2441
tcp_server = MandosServer((server_settings["address"],
2442
server_settings["port"]),
2443
ClientHandler,
2444
interface=(server_settings["interface"]
2445
or None),
2446
use_ipv6=use_ipv6,
2447
gnutls_priority=
2448
server_settings["priority"],
2449
use_dbus=use_dbus,
2450
socketfd=(server_settings["socket"]
2451
or None))
2452
if not foreground:
2453
pidfilename = "/run/mandos.pid"
2454
pidfile = None
2455
try:
2456
pidfile = open(pidfilename, "w")
2457
except IOError as e:
2458
logger.error("Could not open file %r", pidfilename,
2459
exc_info=e)
2460
2461
for name in ("_mandos", "mandos", "nobody"):
2462
try:
2463
uid = pwd.getpwnam(name).pw_uid
2464
gid = pwd.getpwnam(name).pw_gid
2465
break
1048
2466
except KeyError:
1049
try:
1050
uid = pwd.getpwnam("nobody").pw_uid
1051
gid = pwd.getpwnam("nogroup").pw_gid
1052
except KeyError:
1053
uid = 65534
1054
gid = 65534
2467
continue
2468
else:
2469
uid = 65534
2470
gid = 65534
1055
2471
try:
1056
2472
os.setgid(gid)
1057
2473
os.setuid(uid)
1058
except OSError, error:
1059
if error[0] != errno.EPERM:
2474
except OSError as error:
2475
if error.errno != errno.EPERM:
1060
2476
raise error
1061
2477
1062
# Enable all possible GnuTLS debugging
1063
2478
if debug:
2479
# Enable all possible GnuTLS debugging
2480
1064
2481
# "Use a log level over 10 to enable all debugging options."
1065
2482
# - GnuTLS manual
1066
2483
gnutls.library.functions.gnutls_global_set_log_level(11)
1071
2488
1072
2489
(gnutls.library.functions
1073
2490
.gnutls_global_set_log_function(debug_gnutls))
1074
1075
global service
1076
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
service = AvahiService(name = server_settings["servicename"],
1078
servicetype = "_mandos._tcp",
1079
protocol = protocol)
1080
if server_settings["interface"]:
1081
service.interface = (if_nametoindex
1082
(server_settings["interface"]))
2491
2492
# Redirect stdin so all checkers get /dev/null
2493
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2494
os.dup2(null, sys.stdin.fileno())
2495
if null > 2:
2496
os.close(null)
2497
2498
# Need to fork before connecting to D-Bus
2499
if not foreground:
2500
# Close all input and output, do double fork, etc.
2501
daemon()
2502
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
1083
2506
1084
2507
global main_loop
1085
global bus
1086
global server
1087
2508
# From the Avahi example code
1088
DBusGMainLoop(set_as_default=True )
2509
DBusGMainLoop(set_as_default=True)
1089
2510
main_loop = gobject.MainLoop()
1090
2511
bus = dbus.SystemBus()
1091
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
avahi.DBUS_PATH_SERVER),
1093
avahi.DBUS_INTERFACE_SERVER)
1094
2512
# End of Avahi example code
1095
2513
if use_dbus:
1096
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1097
1098
clients.update(Set(Client(name = section,
1099
config
1100
= dict(client_config.items(section)),
1101
use_dbus = use_dbus)
1102
for section in client_config.sections()))
1103
if not clients:
1104
logger.warning(u"No clients defined")
1105
1106
if debug:
1107
# Redirect stdin so all checkers get /dev/null
1108
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1109
os.dup2(null, sys.stdin.fileno())
1110
if null > 2:
1111
os.close(null)
1112
else:
1113
# No console logging
1114
logger.removeHandler(console)
1115
# Close all input and output, do double fork, etc.
1116
daemon()
1117
1118
try:
1119
pid = os.getpid()
1120
pidfile.write(str(pid) + "\n")
1121
pidfile.close()
2514
try:
2515
bus_name = dbus.service.BusName("se.recompile.Mandos",
2516
bus, do_not_queue=True)
2517
old_bus_name = (dbus.service.BusName
2518
("se.bsnet.fukt.Mandos", bus,
2519
do_not_queue=True))
2520
except dbus.exceptions.NameExistsException as e:
2521
logger.error("Disabling D-Bus:", exc_info=e)
2522
use_dbus = False
2523
server_settings["use_dbus"] = False
2524
tcp_server.use_dbus = False
2525
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2526
service = AvahiServiceToSyslog(name =
2527
server_settings["servicename"],
2528
servicetype = "_mandos._tcp",
2529
protocol = protocol, bus = bus)
2530
if server_settings["interface"]:
2531
service.interface = (if_nametoindex
2532
(str(server_settings["interface"])))
2533
2534
global multiprocessing_manager
2535
multiprocessing_manager = multiprocessing.Manager()
2536
2537
client_class = Client
2538
if use_dbus:
2539
client_class = functools.partial(ClientDBus, bus = bus)
2540
2541
client_settings = Client.config_parser(client_config)
2542
old_client_settings = {}
2543
clients_data = {}
2544
2545
# This is used to redirect stdout and stderr for checker processes
2546
global wnull
2547
wnull = open(os.devnull, "w") # A writable /dev/null
2548
# Only used if server is running in foreground but not in debug
2549
# mode
2550
if debug or not foreground:
2551
wnull.close()
2552
2553
# Get client data and settings from last running state.
2554
if server_settings["restore"]:
2555
try:
2556
with open(stored_state_path, "rb") as stored_state:
2557
clients_data, old_client_settings = (pickle.load
2558
(stored_state))
2559
os.remove(stored_state_path)
2560
except IOError as e:
2561
if e.errno == errno.ENOENT:
2562
logger.warning("Could not load persistent state: {0}"
2563
.format(os.strerror(e.errno)))
2564
else:
2565
logger.critical("Could not load persistent state:",
2566
exc_info=e)
2567
raise
2568
except EOFError as e:
2569
logger.warning("Could not load persistent state: "
2570
"EOFError:", exc_info=e)
2571
2572
with PGPEngine() as pgp:
2573
for client_name, client in clients_data.iteritems():
2574
# Skip removed clients
2575
if client_name not in client_settings:
2576
continue
2577
2578
# Decide which value to use after restoring saved state.
2579
# We have three different values: Old config file,
2580
# new config file, and saved state.
2581
# New config value takes precedence if it differs from old
2582
# config value, otherwise use saved state.
2583
for name, value in client_settings[client_name].items():
2584
try:
2585
# For each value in new config, check if it
2586
# differs from the old config value (Except for
2587
# the "secret" attribute)
2588
if (name != "secret" and
2589
value != old_client_settings[client_name]
2590
[name]):
2591
client[name] = value
2592
except KeyError:
2593
pass
2594
2595
# Clients who has passed its expire date can still be
2596
# enabled if its last checker was successful. Clients
2597
# whose checker succeeded before we stored its state is
2598
# assumed to have successfully run all checkers during
2599
# downtime.
2600
if client["enabled"]:
2601
if datetime.datetime.utcnow() >= client["expires"]:
2602
if not client["last_checked_ok"]:
2603
logger.warning(
2604
"disabling client {0} - Client never "
2605
"performed a successful checker"
2606
.format(client_name))
2607
client["enabled"] = False
2608
elif client["last_checker_status"] != 0:
2609
logger.warning(
2610
"disabling client {0} - Client "
2611
"last checker failed with error code {1}"
2612
.format(client_name,
2613
client["last_checker_status"]))
2614
client["enabled"] = False
2615
else:
2616
client["expires"] = (datetime.datetime
2617
.utcnow()
2618
+ client["timeout"])
2619
logger.debug("Last checker succeeded,"
2620
" keeping {0} enabled"
2621
.format(client_name))
2622
try:
2623
client["secret"] = (
2624
pgp.decrypt(client["encrypted_secret"],
2625
client_settings[client_name]
2626
["secret"]))
2627
except PGPError:
2628
# If decryption fails, we use secret from new settings
2629
logger.debug("Failed to decrypt {0} old secret"
2630
.format(client_name))
2631
client["secret"] = (
2632
client_settings[client_name]["secret"])
2633
2634
# Add/remove clients based on new changes made to config
2635
for client_name in (set(old_client_settings)
2636
- set(client_settings)):
2637
del clients_data[client_name]
2638
for client_name in (set(client_settings)
2639
- set(old_client_settings)):
2640
clients_data[client_name] = client_settings[client_name]
2641
2642
# Create all client objects
2643
for client_name, client in clients_data.iteritems():
2644
tcp_server.clients[client_name] = client_class(
2645
name = client_name, settings = client,
2646
server_settings = server_settings)
2647
2648
if not tcp_server.clients:
2649
logger.warning("No clients defined")
2650
2651
if not foreground:
2652
if pidfile is not None:
2653
try:
2654
with pidfile:
2655
pid = os.getpid()
2656
pidfile.write(str(pid) + "\n".encode("utf-8"))
2657
except IOError:
2658
logger.error("Could not write to file %r with PID %d",
2659
pidfilename, pid)
1122
2660
del pidfile
1123
except IOError:
1124
logger.error(u"Could not write to file %r with PID %d",
1125
pidfilename, pid)
1126
except NameError:
1127
# "pidfile" was never created
1128
pass
1129
del pidfilename
1130
1131
def cleanup():
1132
"Cleanup function; run on exit"
1133
global group
1134
# From the Avahi example code
1135
if not group is None:
1136
group.Free()
1137
group = None
1138
# End of Avahi example code
1139
1140
while clients:
1141
client = clients.pop()
1142
client.disable_hook = None
1143
client.disable()
1144
1145
atexit.register(cleanup)
1146
1147
if not debug:
1148
signal.signal(signal.SIGINT, signal.SIG_IGN)
2661
del pidfilename
2662
1149
2663
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1150
2664
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1151
2665
1152
2666
if use_dbus:
1153
class MandosServer(dbus.service.Object):
2667
@alternate_dbus_interfaces({"se.recompile.Mandos":
2668
"se.bsnet.fukt.Mandos"})
2669
class MandosDBusService(DBusObjectWithProperties):
1154
2670
"""A D-Bus proxy object"""
1155
2671
def __init__(self):
1156
2672
dbus.service.Object.__init__(self, bus, "/")
1157
_interface = u"se.bsnet.fukt.Mandos"
1158
1159
@dbus.service.signal(_interface, signature="oa{sv}")
1160
def ClientAdded(self, objpath, properties):
2673
_interface = "se.recompile.Mandos"
2674
2675
@dbus_interface_annotations(_interface)
2676
def _foo(self):
2677
return { "org.freedesktop.DBus.Property"
2678
".EmitsChangedSignal":
2679
"false"}
2680
2681
@dbus.service.signal(_interface, signature="o")
2682
def ClientAdded(self, objpath):
2683
"D-Bus signal"
2684
pass
2685
2686
@dbus.service.signal(_interface, signature="ss")
2687
def ClientNotFound(self, fingerprint, address):
1161
2688
"D-Bus signal"
1162
2689
pass
1163
2690
1169
2696
@dbus.service.method(_interface, out_signature="ao")
1170
2697
def GetAllClients(self):
1171
2698
"D-Bus method"
1172
return dbus.Array(c.dbus_object_path for c in clients)
2699
return dbus.Array(c.dbus_object_path
2700
for c in
2701
tcp_server.clients.itervalues())
1173
2702
1174
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2703
@dbus.service.method(_interface,
2704
out_signature="a{oa{sv}}")
1175
2705
def GetAllClientsWithProperties(self):
1176
2706
"D-Bus method"
1177
2707
return dbus.Dictionary(
1178
((c.dbus_object_path, c.GetAllProperties())
1179
for c in clients),
2708
((c.dbus_object_path, c.GetAll(""))
2709
for c in tcp_server.clients.itervalues()),
1180
2710
signature="oa{sv}")
1181
2711
1182
2712
@dbus.service.method(_interface, in_signature="o")
1183
2713
def RemoveClient(self, object_path):
1184
2714
"D-Bus method"
1185
for c in clients:
2715
for c in tcp_server.clients.itervalues():
1186
2716
if c.dbus_object_path == object_path:
1187
clients.remove(c)
2717
del tcp_server.clients[c.name]
2718
c.remove_from_connection()
1188
2719
# Don't signal anything except ClientRemoved
1189
c.use_dbus = False
1190
c.disable()
2720
c.disable(quiet=True)
1191
2721
# Emit D-Bus signal
1192
2722
self.ClientRemoved(object_path, c.name)
1193
2723
return
1194
raise KeyError
2724
raise KeyError(object_path)
1195
2725
1196
2726
del _interface
1197
2727
1198
mandos_server = MandosServer()
1199
1200
for client in clients:
2728
mandos_dbus_service = MandosDBusService()
2729
2730
def cleanup():
2731
"Cleanup function; run on exit"
2732
service.cleanup()
2733
2734
multiprocessing.active_children()
2735
wnull.close()
2736
if not (tcp_server.clients or client_settings):
2737
return
2738
2739
# Store client before exiting. Secrets are encrypted with key
2740
# based on what config file has. If config file is
2741
# removed/edited, old secret will thus be unrecovable.
2742
clients = {}
2743
with PGPEngine() as pgp:
2744
for client in tcp_server.clients.itervalues():
2745
key = client_settings[client.name]["secret"]
2746
client.encrypted_secret = pgp.encrypt(client.secret,
2747
key)
2748
client_dict = {}
2749
2750
# A list of attributes that can not be pickled
2751
# + secret.
2752
exclude = set(("bus", "changedstate", "secret",
2753
"checker", "server_settings"))
2754
for name, typ in (inspect.getmembers
2755
(dbus.service.Object)):
2756
exclude.add(name)
2757
2758
client_dict["encrypted_secret"] = (client
2759
.encrypted_secret)
2760
for attr in client.client_structure:
2761
if attr not in exclude:
2762
client_dict[attr] = getattr(client, attr)
2763
2764
clients[client.name] = client_dict
2765
del client_settings[client.name]["secret"]
2766
2767
try:
2768
with (tempfile.NamedTemporaryFile
2769
(mode='wb', suffix=".pickle", prefix='clients-',
2770
dir=os.path.dirname(stored_state_path),
2771
delete=False)) as stored_state:
2772
pickle.dump((clients, client_settings), stored_state)
2773
tempname=stored_state.name
2774
os.rename(tempname, stored_state_path)
2775
except (IOError, OSError) as e:
2776
if not debug:
2777
try:
2778
os.remove(tempname)
2779
except NameError:
2780
pass
2781
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2782
logger.warning("Could not save persistent state: {0}"
2783
.format(os.strerror(e.errno)))
2784
else:
2785
logger.warning("Could not save persistent state:",
2786
exc_info=e)
2787
raise e
2788
2789
# Delete all clients, and settings from config
2790
while tcp_server.clients:
2791
name, client = tcp_server.clients.popitem()
2792
if use_dbus:
2793
client.remove_from_connection()
2794
# Don't signal anything except ClientRemoved
2795
client.disable(quiet=True)
2796
if use_dbus:
2797
# Emit D-Bus signal
2798
mandos_dbus_service.ClientRemoved(client
2799
.dbus_object_path,
2800
client.name)
2801
client_settings.clear()
2802
2803
atexit.register(cleanup)
2804
2805
for client in tcp_server.clients.itervalues():
1201
2806
if use_dbus:
1202
2807
# Emit D-Bus signal
1203
mandos_server.ClientAdded(client.dbus_object_path,
1204
client.GetAllProperties())
1205
client.enable()
2808
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2809
# Need to initiate checking of clients
2810
if client.enabled:
2811
client.init_checker()
1206
2812
1207
2813
tcp_server.enable()
1208
2814
tcp_server.server_activate()
1210
2816
# Find out what port we got
1211
2817
service.port = tcp_server.socket.getsockname()[1]
1212
2818
if use_ipv6:
1213
logger.info(u"Now listening on address %r, port %d,"
1214
" flowinfo %d, scope_id %d"
1215
% tcp_server.socket.getsockname())
2819
logger.info("Now listening on address %r, port %d,"
2820
" flowinfo %d, scope_id %d",
2821
*tcp_server.socket.getsockname())
1216
2822
else: # IPv4
1217
logger.info(u"Now listening on address %r, port %d"
1218
% tcp_server.socket.getsockname())
2823
logger.info("Now listening on address %r, port %d",
2824
*tcp_server.socket.getsockname())
1219
2825
1220
2826
#service.interface = tcp_server.socket.getsockname()[3]
1221
2827
1222
2828
try:
1223
2829
# From the Avahi example code
1224
server.connect_to_signal("StateChanged", server_state_changed)
1225
2830
try:
1226
server_state_changed(server.GetState())
1227
except dbus.exceptions.DBusException, error:
1228
logger.critical(u"DBusException: %s", error)
2831
service.activate()
2832
except dbus.exceptions.DBusException as error:
2833
logger.critical("D-Bus Exception", exc_info=error)
2834
cleanup()
1229
2835
sys.exit(1)
1230
2836
# End of Avahi example code
1231
2837
1234
2840
(tcp_server.handle_request
1235
2841
(*args[2:], **kwargs) or True))
1236
2842
1237
logger.debug(u"Starting main loop")
2843
logger.debug("Starting main loop")
1238
2844
main_loop.run()
1239
except AvahiError, error:
1240
logger.critical(u"AvahiError: %s", error)
2845
except AvahiError as error:
2846
logger.critical("Avahi Error", exc_info=error)
2847
cleanup()
1241
2848
sys.exit(1)
1242
2849
except KeyboardInterrupt:
1243
2850
if debug:
1244
print >> sys.stderr
2851
print("", file=sys.stderr)
1245
2852
logger.debug("Server received KeyboardInterrupt")
1246
2853
logger.debug("Server exiting")
2854
# Must run before the D-Bus bus name gets deregistered
2855
cleanup()
1247
2856
1248
2857
if __name__ == '__main__':
1249
2858
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0