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- Committer: Björn Påhlsson
- Date: 2008-08-04 16:06:40 UTC
- mfrom: (42 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 44.
- Revision ID: belorn@braxen-20080804160640-omzss34wcs708i0e
merge
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- debian/upstream
- network-hooks.d
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
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", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# following functions: "AvahiService.add", "AvahiService.remove",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
43
35
import socket
44
import argparse
36
import select
37
from optparse import OptionParser
45
38
import datetime
46
39
import errno
47
40
import gnutls.crypto
50
43
import gnutls.library.functions
51
44
import gnutls.library.constants
52
45
import gnutls.library.types
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
46
import ConfigParser
57
47
import sys
58
48
import re
59
49
import os
60
50
import signal
51
from sets import Set
61
52
import subprocess
62
53
import atexit
63
54
import stat
64
55
import logging
65
56
import logging.handlers
66
import pwd
67
import contextlib
68
import struct
69
import fcntl
70
import functools
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
75
import multiprocessing
76
import types
77
import binascii
78
import tempfile
79
import itertools
80
import collections
81
57
82
58
import dbus
83
import dbus.service
84
try:
85
import gobject
86
except ImportError:
87
from gi.repository import GObject as gobject
59
import gobject
88
60
import avahi
89
61
from dbus.mainloop.glib import DBusGMainLoop
90
62
import ctypes
91
import ctypes.util
92
import xml.dom.minidom
93
import inspect
94
95
try:
96
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
97
except AttributeError:
98
try:
99
from IN import SO_BINDTODEVICE
100
except ImportError:
101
SO_BINDTODEVICE = None
102
103
if sys.version_info.major == 2:
104
str = unicode
105
106
version = "1.6.9"
107
stored_state_file = "clients.pickle"
108
109
logger = logging.getLogger()
110
syslogger = None
111
112
try:
113
if_nametoindex = ctypes.cdll.LoadLibrary(
114
ctypes.util.find_library("c")).if_nametoindex
115
except (OSError, AttributeError):
116
117
def if_nametoindex(interface):
118
"Get an interface index the hard way, i.e. using fcntl()"
119
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
120
with contextlib.closing(socket.socket()) as s:
121
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
122
struct.pack(b"16s16x", interface))
123
interface_index = struct.unpack("I", ifreq[16:20])[0]
124
return interface_index
125
126
127
def initlogger(debug, level=logging.WARNING):
128
"""init logger and add loglevel"""
129
130
global syslogger
131
syslogger = (logging.handlers.SysLogHandler(
132
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
133
address = "/dev/log"))
134
syslogger.setFormatter(logging.Formatter
135
('Mandos [%(process)d]: %(levelname)s:'
136
' %(message)s'))
137
logger.addHandler(syslogger)
138
139
if debug:
140
console = logging.StreamHandler()
141
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
142
' [%(process)d]:'
143
' %(levelname)s:'
144
' %(message)s'))
145
logger.addHandler(console)
146
logger.setLevel(level)
147
148
149
class PGPError(Exception):
150
"""Exception if encryption/decryption fails"""
151
pass
152
153
154
class PGPEngine(object):
155
"""A simple class for OpenPGP symmetric encryption & decryption"""
156
157
def __init__(self):
158
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
159
self.gnupgargs = ['--batch',
160
'--home', self.tempdir,
161
'--force-mdc',
162
'--quiet',
163
'--no-use-agent']
164
165
def __enter__(self):
166
return self
167
168
def __exit__(self, exc_type, exc_value, traceback):
169
self._cleanup()
170
return False
171
172
def __del__(self):
173
self._cleanup()
174
175
def _cleanup(self):
176
if self.tempdir is not None:
177
# Delete contents of tempdir
178
for root, dirs, files in os.walk(self.tempdir,
179
topdown = False):
180
for filename in files:
181
os.remove(os.path.join(root, filename))
182
for dirname in dirs:
183
os.rmdir(os.path.join(root, dirname))
184
# Remove tempdir
185
os.rmdir(self.tempdir)
186
self.tempdir = None
187
188
def password_encode(self, password):
189
# Passphrase can not be empty and can not contain newlines or
190
# NUL bytes. So we prefix it and hex encode it.
191
encoded = b"mandos" + binascii.hexlify(password)
192
if len(encoded) > 2048:
193
# GnuPG can't handle long passwords, so encode differently
194
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
195
.replace(b"\n", b"\\n")
196
.replace(b"\0", b"\\x00"))
197
return encoded
198
199
def encrypt(self, data, password):
200
passphrase = self.password_encode(password)
201
with tempfile.NamedTemporaryFile(
202
dir=self.tempdir) as passfile:
203
passfile.write(passphrase)
204
passfile.flush()
205
proc = subprocess.Popen(['gpg', '--symmetric',
206
'--passphrase-file',
207
passfile.name]
208
+ self.gnupgargs,
209
stdin = subprocess.PIPE,
210
stdout = subprocess.PIPE,
211
stderr = subprocess.PIPE)
212
ciphertext, err = proc.communicate(input = data)
213
if proc.returncode != 0:
214
raise PGPError(err)
215
return ciphertext
216
217
def decrypt(self, data, password):
218
passphrase = self.password_encode(password)
219
with tempfile.NamedTemporaryFile(
220
dir = self.tempdir) as passfile:
221
passfile.write(passphrase)
222
passfile.flush()
223
proc = subprocess.Popen(['gpg', '--decrypt',
224
'--passphrase-file',
225
passfile.name]
226
+ self.gnupgargs,
227
stdin = subprocess.PIPE,
228
stdout = subprocess.PIPE,
229
stderr = subprocess.PIPE)
230
decrypted_plaintext, err = proc.communicate(input = data)
231
if proc.returncode != 0:
232
raise PGPError(err)
233
return decrypted_plaintext
63
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
68
# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
70
# supply an OpenPGP certificate, and the fingerprint of this
71
# certificate is used by this server to look up (in a list read from a
72
# file at start time) which binary blob to give the client. No other
73
# authentication or authorization is done by this server.
74
75
76
logger = logging.Logger('mandos')
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
81
logger.addHandler(syslogger)
82
del syslogger
234
83
235
84
236
85
class AvahiError(Exception):
237
def __init__(self, value, *args, **kwargs):
86
def __init__(self, value):
238
87
self.value = value
239
return super(AvahiError, self).__init__(value, *args,
240
**kwargs)
241
88
def __str__(self):
89
return repr(self.value)
242
90
243
91
class AvahiServiceError(AvahiError):
244
92
pass
245
93
246
247
94
class AvahiGroupError(AvahiError):
248
95
pass
249
96
250
97
251
98
class AvahiService(object):
252
"""An Avahi (Zeroconf) service.
253
254
Attributes:
99
"""
255
100
interface: integer; avahi.IF_UNSPEC or an interface index.
256
101
Used to optionally bind to the specified interface.
257
name: string; Example: 'Mandos'
258
type: string; Example: '_mandos._tcp'.
259
See <https://www.iana.org/assignments/service-names-port-numbers>
260
port: integer; what port to announce
261
TXT: list of strings; TXT record for the service
262
domain: string; Domain to publish on, default to .local if empty.
263
host: string; Host to publish records for, default is localhost
264
max_renames: integer; maximum number of renames
265
rename_count: integer; counter so we only rename after collisions
266
a sensible number of times
267
group: D-Bus Entry Group
268
server: D-Bus Server
269
bus: dbus.SystemBus()
102
name = string; Example: "Mandos"
103
type = string; Example: "_mandos._tcp".
104
See <http://www.dns-sd.org/ServiceTypes.html>
105
port = integer; what port to announce
106
TXT = list of strings; TXT record for the service
107
domain = string; Domain to publish on, default to .local if empty.
108
host = string; Host to publish records for, default to localhost
109
if empty.
110
max_renames = integer; maximum number of renames
111
rename_count = integer; counter so we only rename after collisions
112
a sensible number of times
270
113
"""
271
272
def __init__(self,
273
interface = avahi.IF_UNSPEC,
274
name = None,
275
servicetype = None,
276
port = None,
277
TXT = None,
278
domain = "",
279
host = "",
280
max_renames = 32768,
281
protocol = avahi.PROTO_UNSPEC,
282
bus = None):
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
117
"""An Avahi (Zeroconf) service. """
283
118
self.interface = interface
284
119
self.name = name
285
self.type = servicetype
120
self.type = type
286
121
self.port = port
287
self.TXT = TXT if TXT is not None else []
122
if TXT is None:
123
self.TXT = []
124
else:
125
self.TXT = TXT
288
126
self.domain = domain
289
127
self.host = host
290
128
self.rename_count = 0
291
self.max_renames = max_renames
292
self.protocol = protocol
293
self.group = None # our entry group
294
self.server = None
295
self.bus = bus
296
self.entry_group_state_changed_match = None
297
298
def rename(self, remove=True):
129
def rename(self):
299
130
"""Derived from the Avahi example code"""
300
131
if self.rename_count >= self.max_renames:
301
logger.critical("No suitable Zeroconf service name found"
302
" after %i retries, exiting.",
303
self.rename_count)
132
logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
304
134
raise AvahiServiceError("Too many renames")
305
self.name = str(
306
self.server.GetAlternativeServiceName(self.name))
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", name)
137
self.remove()
138
self.add()
307
139
self.rename_count += 1
308
logger.info("Changing Zeroconf service name to %r ...",
309
self.name)
310
if remove:
311
self.remove()
312
try:
313
self.add()
314
except dbus.exceptions.DBusException as error:
315
if (error.get_dbus_name()
316
== "org.freedesktop.Avahi.CollisionError"):
317
logger.info("Local Zeroconf service name collision.")
318
return self.rename(remove=False)
319
else:
320
logger.critical("D-Bus Exception", exc_info=error)
321
self.cleanup()
322
os._exit(1)
323
324
140
def remove(self):
325
141
"""Derived from the Avahi example code"""
326
if self.entry_group_state_changed_match is not None:
327
self.entry_group_state_changed_match.remove()
328
self.entry_group_state_changed_match = None
329
if self.group is not None:
330
self.group.Reset()
331
142
if group is not None:
143
group.Reset()
332
144
def add(self):
333
145
"""Derived from the Avahi example code"""
334
self.remove()
335
if self.group is None:
336
self.group = dbus.Interface(
337
self.bus.get_object(avahi.DBUS_NAME,
338
self.server.EntryGroupNew()),
339
avahi.DBUS_INTERFACE_ENTRY_GROUP)
340
self.entry_group_state_changed_match = (
341
self.group.connect_to_signal(
342
'StateChanged', self.entry_group_state_changed))
343
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
344
self.name, self.type)
345
self.group.AddService(
346
self.interface,
347
self.protocol,
348
dbus.UInt32(0), # flags
349
self.name, self.type,
350
self.domain, self.host,
351
dbus.UInt16(self.port),
352
avahi.string_array_to_txt_array(self.TXT))
353
self.group.Commit()
354
355
def entry_group_state_changed(self, state, error):
356
"""Derived from the Avahi example code"""
357
logger.debug("Avahi entry group state change: %i", state)
358
359
if state == avahi.ENTRY_GROUP_ESTABLISHED:
360
logger.debug("Zeroconf service established.")
361
elif state == avahi.ENTRY_GROUP_COLLISION:
362
logger.info("Zeroconf service name collision.")
363
self.rename()
364
elif state == avahi.ENTRY_GROUP_FAILURE:
365
logger.critical("Avahi: Error in group state changed %s",
366
str(error))
367
raise AvahiGroupError("State changed: {!s}".format(error))
368
369
def cleanup(self):
370
"""Derived from the Avahi example code"""
371
if self.group is not None:
372
try:
373
self.group.Free()
374
except (dbus.exceptions.UnknownMethodException,
375
dbus.exceptions.DBusException):
376
pass
377
self.group = None
378
self.remove()
379
380
def server_state_changed(self, state, error=None):
381
"""Derived from the Avahi example code"""
382
logger.debug("Avahi server state change: %i", state)
383
bad_states = {
384
avahi.SERVER_INVALID: "Zeroconf server invalid",
385
avahi.SERVER_REGISTERING: None,
386
avahi.SERVER_COLLISION: "Zeroconf server name collision",
387
avahi.SERVER_FAILURE: "Zeroconf server failure",
388
}
389
if state in bad_states:
390
if bad_states[state] is not None:
391
if error is None:
392
logger.error(bad_states[state])
393
else:
394
logger.error(bad_states[state] + ": %r", error)
395
self.cleanup()
396
elif state == avahi.SERVER_RUNNING:
397
self.add()
398
else:
399
if error is None:
400
logger.debug("Unknown state: %r", state)
401
else:
402
logger.debug("Unknown state: %r: %r", state, error)
403
404
def activate(self):
405
"""Derived from the Avahi example code"""
406
if self.server is None:
407
self.server = dbus.Interface(
408
self.bus.get_object(avahi.DBUS_NAME,
409
avahi.DBUS_PATH_SERVER,
410
follow_name_owner_changes=True),
411
avahi.DBUS_INTERFACE_SERVER)
412
self.server.connect_to_signal("StateChanged",
413
self.server_state_changed)
414
self.server_state_changed(self.server.GetState())
415
416
417
class AvahiServiceToSyslog(AvahiService):
418
def rename(self, *args, **kwargs):
419
"""Add the new name to the syslog messages"""
420
ret = AvahiService.rename(self, *args, **kwargs)
421
syslogger.setFormatter(logging.Formatter(
422
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
423
.format(self.name)))
424
return ret
425
426
def call_pipe(connection, # : multiprocessing.Connection
427
func, *args, **kwargs):
428
"""This function is meant to be called by multiprocessing.Process
429
430
This function runs func(*args, **kwargs), and writes the resulting
431
return value on the provided multiprocessing.Connection.
432
"""
433
connection.send(func(*args, **kwargs))
434
connection.close()
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
169
435
170
436
171
class Client(object):
437
172
"""A representation of a client host served by this server.
438
439
173
Attributes:
440
approved: bool(); 'None' if not yet approved/disapproved
441
approval_delay: datetime.timedelta(); Time to wait for approval
442
approval_duration: datetime.timedelta(); Duration of one approval
443
checker: subprocess.Popen(); a running checker process used
444
to see if the client lives.
445
'None' if no process is running.
446
checker_callback_tag: a gobject event source tag, or None
447
checker_command: string; External command which is run to check
448
if client lives. %() expansions are done at
174
name: string; from the config file, used in log messages
175
fingerprint: string (40 or 32 hexadecimal digits); used to
176
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
fqdn: string (FQDN); available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
190
checker_callback_tag: - '' -
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
449
193
runtime with vars(self) as dict, so that for
450
194
instance %(name)s can be used in the command.
451
checker_initiator_tag: a gobject event source tag, or None
452
created: datetime.datetime(); (UTC) object creation
453
client_structure: Object describing what attributes a client has
454
and is used for storing the client at exit
455
current_checker_command: string; current running checker_command
456
disable_initiator_tag: a gobject event source tag, or None
457
enabled: bool()
458
fingerprint: string (40 or 32 hexadecimal digits); used to
459
uniquely identify the client
460
host: string; available for use by the checker command
461
interval: datetime.timedelta(); How often to start a new checker
462
last_approval_request: datetime.datetime(); (UTC) or None
463
last_checked_ok: datetime.datetime(); (UTC) or None
464
last_checker_status: integer between 0 and 255 reflecting exit
465
status of last checker. -1 reflects crashed
466
checker, -2 means no checker completed yet.
467
last_checker_signal: The signal which killed the last checker, if
468
last_checker_status is -1
469
last_enabled: datetime.datetime(); (UTC) or None
470
name: string; from the config file, used in log messages and
471
D-Bus identifiers
472
secret: bytestring; sent verbatim (over TLS) to client
473
timeout: datetime.timedelta(); How long from last_checked_ok
474
until this client is disabled
475
extended_timeout: extra long timeout when secret has been sent
476
runtime_expansions: Allowed attributes for runtime expansion.
477
expires: datetime.datetime(); time (UTC) when a client will be
478
disabled, or None
479
server_settings: The server_settings dict from main()
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
480
200
"""
481
482
runtime_expansions = ("approval_delay", "approval_duration",
483
"created", "enabled", "expires",
484
"fingerprint", "host", "interval",
485
"last_approval_request", "last_checked_ok",
486
"last_enabled", "name", "timeout")
487
client_defaults = {
488
"timeout": "PT5M",
489
"extended_timeout": "PT15M",
490
"interval": "PT2M",
491
"checker": "fping -q -- %%(host)s",
492
"host": "",
493
"approval_delay": "PT0S",
494
"approval_duration": "PT1S",
495
"approved_by_default": "True",
496
"enabled": "True",
497
}
498
499
@staticmethod
500
def config_parser(config):
501
"""Construct a new dict of client settings of this form:
502
{ client_name: {setting_name: value, ...}, ...}
503
with exceptions for any special settings as defined above.
504
NOTE: Must be a pure function. Must return the same result
505
value given the same arguments.
506
"""
507
settings = {}
508
for client_name in config.sections():
509
section = dict(config.items(client_name))
510
client = settings[client_name] = {}
511
512
client["host"] = section["host"]
513
# Reformat values from string types to Python types
514
client["approved_by_default"] = config.getboolean(
515
client_name, "approved_by_default")
516
client["enabled"] = config.getboolean(client_name,
517
"enabled")
518
519
# Uppercase and remove spaces from fingerprint for later
520
# comparison purposes with return value from the
521
# fingerprint() function
522
client["fingerprint"] = (section["fingerprint"].upper()
523
.replace(" ", ""))
524
if "secret" in section:
525
client["secret"] = section["secret"].decode("base64")
526
elif "secfile" in section:
527
with open(os.path.expanduser(os.path.expandvars
528
(section["secfile"])),
529
"rb") as secfile:
530
client["secret"] = secfile.read()
531
else:
532
raise TypeError("No secret or secfile for section {}"
533
.format(section))
534
client["timeout"] = string_to_delta(section["timeout"])
535
client["extended_timeout"] = string_to_delta(
536
section["extended_timeout"])
537
client["interval"] = string_to_delta(section["interval"])
538
client["approval_delay"] = string_to_delta(
539
section["approval_delay"])
540
client["approval_duration"] = string_to_delta(
541
section["approval_duration"])
542
client["checker_command"] = section["checker"]
543
client["last_approval_request"] = None
544
client["last_checked_ok"] = None
545
client["last_checker_status"] = -2
546
547
return settings
548
549
def __init__(self, settings, name = None, server_settings=None):
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
550
229
self.name = name
551
if server_settings is None:
552
server_settings = {}
553
self.server_settings = server_settings
554
# adding all client settings
555
for setting, value in settings.items():
556
setattr(self, setting, value)
557
558
if self.enabled:
559
if not hasattr(self, "last_enabled"):
560
self.last_enabled = datetime.datetime.utcnow()
561
if not hasattr(self, "expires"):
562
self.expires = (datetime.datetime.utcnow()
563
+ self.timeout)
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint
232
# for later comparison purposes with return value of
233
# the fingerprint() function
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if secret:
237
self.secret = secret.decode(u"base64")
238
elif secfile:
239
sf = open(secfile)
240
self.secret = sf.read()
241
sf.close()
564
242
else:
565
self.last_enabled = None
566
self.expires = None
567
568
logger.debug("Creating client %r", self.name)
569
logger.debug(" Fingerprint: %s", self.fingerprint)
570
self.created = settings.get("created",
571
datetime.datetime.utcnow())
572
573
# attributes specific for this server instance
243
raise TypeError(u"No secret or secfile for client %s"
244
% self.name)
245
self.fqdn = fqdn
246
self.created = datetime.datetime.now()
247
self.last_checked_ok = None
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
250
self.stop_hook = stop_hook
574
251
self.checker = None
575
252
self.checker_initiator_tag = None
576
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
577
254
self.checker_callback_tag = None
578
self.current_checker_command = None
579
self.approved = None
580
self.approvals_pending = 0
581
self.changedstate = multiprocessing_manager.Condition(
582
multiprocessing_manager.Lock())
583
self.client_structure = [attr
584
for attr in self.__dict__.iterkeys()
585
if not attr.startswith("_")]
586
self.client_structure.append("client_structure")
587
588
for name, t in inspect.getmembers(
589
type(self), lambda obj: isinstance(obj, property)):
590
if not name.startswith("_"):
591
self.client_structure.append(name)
592
593
# Send notice to process children that client state has changed
594
def send_changedstate(self):
595
with self.changedstate:
596
self.changedstate.notify_all()
597
598
def enable(self):
255
self.check_command = checker
256
def start(self):
599
257
"""Start this client's checker and timeout hooks"""
600
if getattr(self, "enabled", False):
601
# Already enabled
602
return
603
self.expires = datetime.datetime.utcnow() + self.timeout
604
self.enabled = True
605
self.last_enabled = datetime.datetime.utcnow()
606
self.init_checker()
607
self.send_changedstate()
608
609
def disable(self, quiet=True):
610
"""Disable this client."""
611
if not getattr(self, "enabled", False):
612
return False
613
if not quiet:
614
logger.info("Disabling client %s", self.name)
615
if getattr(self, "disable_initiator_tag", None) is not None:
616
gobject.source_remove(self.disable_initiator_tag)
617
self.disable_initiator_tag = None
618
self.expires = None
619
if getattr(self, "checker_initiator_tag", None) is not None:
620
gobject.source_remove(self.checker_initiator_tag)
621
self.checker_initiator_tag = None
622
self.stop_checker()
623
self.enabled = False
624
if not quiet:
625
self.send_changedstate()
626
# Do not run this again if called by a gobject.timeout_add
627
return False
628
629
def __del__(self):
630
self.disable()
631
632
def init_checker(self):
633
258
# Schedule a new checker to be started an 'interval' from now,
634
259
# and every interval from then on.
635
if self.checker_initiator_tag is not None:
636
gobject.source_remove(self.checker_initiator_tag)
637
self.checker_initiator_tag = gobject.timeout_add(
638
int(self.interval.total_seconds() * 1000),
639
self.start_checker)
640
# Schedule a disable() when 'timeout' has passed
641
if self.disable_initiator_tag is not None:
642
gobject.source_remove(self.disable_initiator_tag)
643
self.disable_initiator_tag = gobject.timeout_add(
644
int(self.timeout.total_seconds() * 1000), self.disable)
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
645
263
# Also start a new checker *right now*.
646
264
self.start_checker()
647
648
def checker_callback(self, source, condition,
649
(connection, command)):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if self.secret:
275
logger.debug(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
278
return False
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
283
gobject.source_remove(self.checker_initiator_tag)
284
self.checker_initiator_tag = None
285
self.stop_checker()
286
if self.stop_hook:
287
self.stop_hook(self)
288
# Do not run this again if called by a gobject.timeout_add
289
return False
290
def __del__(self):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
650
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
651
296
self.checker_callback_tag = None
652
297
self.checker = None
653
# Read return code from connection (see call_pipe)
654
returncode = connection.recv()
655
connection.close()
656
657
if returncode >= 0:
658
self.last_checker_status = returncode
659
self.last_checker_signal = None
660
if self.last_checker_status == 0:
661
logger.info("Checker for %(name)s succeeded",
662
vars(self))
663
self.checked_ok()
664
else:
665
logger.info("Checker for %(name)s failed", vars(self))
666
else:
667
self.last_checker_status = -1
668
self.last_checker_signal = -returncode
669
logger.warning("Checker for %(name)s crashed?",
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.debug(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
308
logger.warning(u"Checker for %(name)s crashed?",
670
309
vars(self))
671
return False
672
673
def checked_ok(self):
674
"""Assert that the client has been seen, alive and well."""
675
self.last_checked_ok = datetime.datetime.utcnow()
676
self.last_checker_status = 0
677
self.last_checker_signal = None
678
self.bump_timeout()
679
680
def bump_timeout(self, timeout=None):
681
"""Bump up the timeout for this client."""
682
if timeout is None:
683
timeout = self.timeout
684
if self.disable_initiator_tag is not None:
685
gobject.source_remove(self.disable_initiator_tag)
686
self.disable_initiator_tag = None
687
if getattr(self, "enabled", False):
688
self.disable_initiator_tag = gobject.timeout_add(
689
int(timeout.total_seconds() * 1000), self.disable)
690
self.expires = datetime.datetime.utcnow() + timeout
691
692
def need_approval(self):
693
self.last_approval_request = datetime.datetime.utcnow()
694
310
else:
311
logger.debug(u"Checker for %(name)s failed",
312
vars(self))
695
313
def start_checker(self):
696
314
"""Start a new checker subprocess if one is not running.
697
698
315
If a checker already exists, leave it running and do
699
316
nothing."""
700
317
# The reason for not killing a running checker is that if we
701
# did that, and if a checker (for some reason) started running
702
# slowly and taking more than 'interval' time, then the client
703
# would inevitably timeout, since no checker would get a
704
# chance to run to completion. If we instead leave running
318
# did that, then if a checker (for some reason) started
319
# running slowly and taking more than 'interval' time, the
320
# client would inevitably timeout, since no checker would get
321
# a chance to run to completion. If we instead leave running
705
322
# checkers alone, the checker would have to take more time
706
# than 'timeout' for the client to be disabled, which is as it
707
# should be.
708
709
if self.checker is not None and not self.checker.is_alive():
710
logger.warning("Checker was not alive; joining")
711
self.checker.join()
712
self.checker = None
713
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
714
325
if self.checker is None:
715
# Escape attributes for the shell
716
escaped_attrs = {
717
attr: re.escape(str(getattr(self, attr)))
718
for attr in self.runtime_expansions }
719
try:
720
command = self.checker_command % escaped_attrs
721
except TypeError as error:
722
logger.error('Could not format string "%s"',
723
self.checker_command,
724
exc_info=error)
725
return True # Try again later
726
self.current_checker_command = command
727
logger.info("Starting checker %r for %s", command,
728
self.name)
729
# We don't need to redirect stdout and stderr, since
730
# in normal mode, that is already done by daemon(),
731
# and in debug mode we don't want to. (Stdin is
732
# always replaced by /dev/null.)
733
# The exception is when not debugging but nevertheless
734
# running in the foreground; use the previously
735
# created wnull.
736
popen_args = { "close_fds": True,
737
"shell": True,
738
"cwd": "/" }
739
if (not self.server_settings["debug"]
740
and self.server_settings["foreground"]):
741
popen_args.update({"stdout": wnull,
742
"stderr": wnull })
743
pipe = multiprocessing.Pipe(duplex=False)
744
self.checker = multiprocessing.Process(
745
target = call_pipe,
746
args = (subprocess.call, pipe[1], command),
747
kwargs = popen_args)
748
self.checker.start()
749
self.checker_callback_tag = gobject.io_add_watch(
750
pipe[0].fileno(), gobject.IO_IN,
751
self.checker_callback, (pipe[0], command))
326
try:
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.fqdn
329
except TypeError:
330
# Escape attributes for the shell
331
escaped_attrs = dict((key, re.escape(str(val)))
332
for key, val in
333
vars(self).iteritems())
334
try:
335
command = self.check_command % escaped_attrs
336
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
339
return True # Try again later
340
try:
341
logger.debug(u"Starting checker %r for %s",
342
command, self.name)
343
self.checker = subprocess.Popen(command,
344
close_fds=True,
345
shell=True, cwd="/")
346
self.checker_callback_tag = gobject.child_watch_add\
347
(self.checker.pid,
348
self.checker_callback)
349
except subprocess.OSError, error:
350
logger.error(u"Failed to start subprocess: %s",
351
error)
752
352
# Re-run this periodically if run by gobject.timeout_add
753
353
return True
754
755
354
def stop_checker(self):
756
355
"""Force the checker process, if any, to stop."""
757
356
if self.checker_callback_tag:
760
359
if getattr(self, "checker", None) is None:
761
360
return
762
361
logger.debug("Stopping checker for %(name)s", vars(self))
763
self.checker.terminate()
362
try:
363
os.kill(self.checker.pid, signal.SIGTERM)
364
#os.sleep(0.5)
365
#if self.checker.poll() is None:
366
# os.kill(self.checker.pid, signal.SIGKILL)
367
except OSError, error:
368
if error.errno != errno.ESRCH: # No such process
369
raise
764
370
self.checker = None
765
766
767
def dbus_service_property(dbus_interface,
768
signature="v",
769
access="readwrite",
770
byte_arrays=False):
771
"""Decorators for marking methods of a DBusObjectWithProperties to
772
become properties on the D-Bus.
773
774
The decorated method will be called with no arguments by "Get"
775
and with one argument by "Set".
776
777
The parameters, where they are supported, are the same as
778
dbus.service.method, except there is only "signature", since the
779
type from Get() and the type sent to Set() is the same.
780
"""
781
# Encoding deeply encoded byte arrays is not supported yet by the
782
# "Set" method, so we fail early here:
783
if byte_arrays and signature != "ay":
784
raise ValueError("Byte arrays not supported for non-'ay'"
785
" signature {!r}".format(signature))
786
787
def decorator(func):
788
func._dbus_is_property = True
789
func._dbus_interface = dbus_interface
790
func._dbus_signature = signature
791
func._dbus_access = access
792
func._dbus_name = func.__name__
793
if func._dbus_name.endswith("_dbus_property"):
794
func._dbus_name = func._dbus_name[:-14]
795
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
796
return func
797
798
return decorator
799
800
801
def dbus_interface_annotations(dbus_interface):
802
"""Decorator for marking functions returning interface annotations
803
804
Usage:
805
806
@dbus_interface_annotations("org.example.Interface")
807
def _foo(self): # Function name does not matter
808
return {"org.freedesktop.DBus.Deprecated": "true",
809
"org.freedesktop.DBus.Property.EmitsChangedSignal":
810
"false"}
811
"""
812
813
def decorator(func):
814
func._dbus_is_interface = True
815
func._dbus_interface = dbus_interface
816
func._dbus_name = dbus_interface
817
return func
818
819
return decorator
820
821
822
def dbus_annotations(annotations):
823
"""Decorator to annotate D-Bus methods, signals or properties
824
Usage:
825
826
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
827
"org.freedesktop.DBus.Property."
828
"EmitsChangedSignal": "false"})
829
@dbus_service_property("org.example.Interface", signature="b",
830
access="r")
831
def Property_dbus_property(self):
832
return dbus.Boolean(False)
833
"""
834
835
def decorator(func):
836
func._dbus_annotations = annotations
837
return func
838
839
return decorator
840
841
842
class DBusPropertyException(dbus.exceptions.DBusException):
843
"""A base class for D-Bus property-related exceptions
844
"""
845
pass
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_{}".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", name),
882
athing.__get__(self))
883
for cls in self.__class__.__mro__
884
for name, athing in
885
inspect.getmembers(cls, self._is_dbus_thing(thing)))
886
887
def _get_dbus_property(self, interface_name, property_name):
888
"""Returns a bound method if one exists which is a D-Bus
889
property with the specified name and interface.
890
"""
891
for cls in self.__class__.__mro__:
892
for name, value in inspect.getmembers(
893
cls, self._is_dbus_thing("property")):
894
if (value._dbus_name == property_name
895
and value._dbus_interface == interface_name):
896
return value.__get__(self)
897
898
# No such property
899
raise DBusPropertyNotFound("{}:{}.{}".format(
900
self.dbus_object_path, interface_name, property_name))
901
902
@dbus.service.method(dbus.PROPERTIES_IFACE,
903
in_signature="ss",
904
out_signature="v")
905
def Get(self, interface_name, property_name):
906
"""Standard D-Bus property Get() method, see D-Bus standard.
907
"""
908
prop = self._get_dbus_property(interface_name, property_name)
909
if prop._dbus_access == "write":
910
raise DBusPropertyAccessException(property_name)
911
value = prop()
912
if not hasattr(value, "variant_level"):
913
return value
914
return type(value)(value, variant_level=value.variant_level+1)
915
916
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
917
def Set(self, interface_name, property_name, value):
918
"""Standard D-Bus property Set() method, see D-Bus standard.
919
"""
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "read":
922
raise DBusPropertyAccessException(property_name)
923
if prop._dbus_get_args_options["byte_arrays"]:
924
# The byte_arrays option is not supported yet on
925
# signatures other than "ay".
926
if prop._dbus_signature != "ay":
927
raise ValueError("Byte arrays not supported for non-"
928
"'ay' signature {!r}"
929
.format(prop._dbus_signature))
930
value = dbus.ByteArray(b''.join(chr(byte)
931
for byte in value))
932
prop(value)
933
934
@dbus.service.method(dbus.PROPERTIES_IFACE,
935
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)(
957
value, variant_level = value.variant_level + 1)
958
return dbus.Dictionary(properties, signature="sv")
959
960
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
961
def PropertiesChanged(self, interface_name, changed_properties,
962
invalidated_properties):
963
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
964
standard.
965
"""
966
pass
967
968
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
969
out_signature="s",
970
path_keyword='object_path',
971
connection_keyword='connection')
972
def Introspect(self, object_path, connection):
973
"""Overloading of standard D-Bus method.
974
975
Inserts property tags and interface annotation tags.
976
"""
977
xmlstring = dbus.service.Object.Introspect(self, object_path,
978
connection)
979
try:
980
document = xml.dom.minidom.parseString(xmlstring)
981
982
def make_tag(document, name, prop):
983
e = document.createElement("property")
984
e.setAttribute("name", name)
985
e.setAttribute("type", prop._dbus_signature)
986
e.setAttribute("access", prop._dbus_access)
987
return e
988
989
for if_tag in document.getElementsByTagName("interface"):
990
# Add property tags
991
for tag in (make_tag(document, name, prop)
992
for name, prop
993
in self._get_all_dbus_things("property")
994
if prop._dbus_interface
995
== if_tag.getAttribute("name")):
996
if_tag.appendChild(tag)
997
# Add annotation tags
998
for typ in ("method", "signal", "property"):
999
for tag in if_tag.getElementsByTagName(typ):
1000
annots = dict()
1001
for name, prop in (self.
1002
_get_all_dbus_things(typ)):
1003
if (name == tag.getAttribute("name")
1004
and prop._dbus_interface
1005
== if_tag.getAttribute("name")):
1006
annots.update(getattr(
1007
prop, "_dbus_annotations", {}))
1008
for name, value in annots.items():
1009
ann_tag = document.createElement(
1010
"annotation")
1011
ann_tag.setAttribute("name", name)
1012
ann_tag.setAttribute("value", value)
1013
tag.appendChild(ann_tag)
1014
# Add interface annotation tags
1015
for annotation, value in dict(
1016
itertools.chain.from_iterable(
1017
annotations().items()
1018
for name, annotations
1019
in self._get_all_dbus_things("interface")
1020
if name == if_tag.getAttribute("name")
1021
)).items():
1022
ann_tag = document.createElement("annotation")
1023
ann_tag.setAttribute("name", annotation)
1024
ann_tag.setAttribute("value", value)
1025
if_tag.appendChild(ann_tag)
1026
# Add the names to the return values for the
1027
# "org.freedesktop.DBus.Properties" methods
1028
if (if_tag.getAttribute("name")
1029
== "org.freedesktop.DBus.Properties"):
1030
for cn in if_tag.getElementsByTagName("method"):
1031
if cn.getAttribute("name") == "Get":
1032
for arg in cn.getElementsByTagName("arg"):
1033
if (arg.getAttribute("direction")
1034
== "out"):
1035
arg.setAttribute("name", "value")
1036
elif cn.getAttribute("name") == "GetAll":
1037
for arg in cn.getElementsByTagName("arg"):
1038
if (arg.getAttribute("direction")
1039
== "out"):
1040
arg.setAttribute("name", "props")
1041
xmlstring = document.toxml("utf-8")
1042
document.unlink()
1043
except (AttributeError, xml.dom.DOMException,
1044
xml.parsers.expat.ExpatError) as error:
1045
logger.error("Failed to override Introspection method",
1046
exc_info=error)
1047
return xmlstring
1048
1049
1050
def datetime_to_dbus(dt, variant_level=0):
1051
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1052
if dt is None:
1053
return dbus.String("", variant_level = variant_level)
1054
return dbus.String(dt.isoformat(), variant_level=variant_level)
1055
1056
1057
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1058
"""A class decorator; applied to a subclass of
1059
dbus.service.Object, it will add alternate D-Bus attributes with
1060
interface names according to the "alt_interface_names" mapping.
1061
Usage:
1062
1063
@alternate_dbus_interfaces({"org.example.Interface":
1064
"net.example.AlternateInterface"})
1065
class SampleDBusObject(dbus.service.Object):
1066
@dbus.service.method("org.example.Interface")
1067
def SampleDBusMethod():
1068
pass
1069
1070
The above "SampleDBusMethod" on "SampleDBusObject" will be
1071
reachable via two interfaces: "org.example.Interface" and
1072
"net.example.AlternateInterface", the latter of which will have
1073
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1074
"true", unless "deprecate" is passed with a False value.
1075
1076
This works for methods and signals, and also for D-Bus properties
1077
(from DBusObjectWithProperties) and interfaces (from the
1078
dbus_interface_annotations decorator).
1079
"""
1080
1081
def wrapper(cls):
1082
for orig_interface_name, alt_interface_name in (
1083
alt_interface_names.items()):
1084
attr = {}
1085
interface_names = set()
1086
# Go though all attributes of the class
1087
for attrname, attribute in inspect.getmembers(cls):
1088
# Ignore non-D-Bus attributes, and D-Bus attributes
1089
# with the wrong interface name
1090
if (not hasattr(attribute, "_dbus_interface")
1091
or not attribute._dbus_interface.startswith(
1092
orig_interface_name)):
1093
continue
1094
# Create an alternate D-Bus interface name based on
1095
# the current name
1096
alt_interface = attribute._dbus_interface.replace(
1097
orig_interface_name, alt_interface_name)
1098
interface_names.add(alt_interface)
1099
# Is this a D-Bus signal?
1100
if getattr(attribute, "_dbus_is_signal", False):
1101
# Extract the original non-method undecorated
1102
# function by black magic
1103
nonmethod_func = (dict(
1104
zip(attribute.func_code.co_freevars,
1105
attribute.__closure__))
1106
["func"].cell_contents)
1107
# Create a new, but exactly alike, function
1108
# object, and decorate it to be a new D-Bus signal
1109
# with the alternate D-Bus interface name
1110
new_function = (dbus.service.signal(
1111
alt_interface, attribute._dbus_signature)
1112
(types.FunctionType(
1113
nonmethod_func.func_code,
1114
nonmethod_func.func_globals,
1115
nonmethod_func.func_name,
1116
nonmethod_func.func_defaults,
1117
nonmethod_func.func_closure)))
1118
# Copy annotations, if any
1119
try:
1120
new_function._dbus_annotations = dict(
1121
attribute._dbus_annotations)
1122
except AttributeError:
1123
pass
1124
# Define a creator of a function to call both the
1125
# original and alternate functions, so both the
1126
# original and alternate signals gets sent when
1127
# the function is called
1128
def fixscope(func1, func2):
1129
"""This function is a scope container to pass
1130
func1 and func2 to the "call_both" function
1131
outside of its arguments"""
1132
1133
def call_both(*args, **kwargs):
1134
"""This function will emit two D-Bus
1135
signals by calling func1 and func2"""
1136
func1(*args, **kwargs)
1137
func2(*args, **kwargs)
1138
1139
return call_both
1140
# Create the "call_both" function and add it to
1141
# the class
1142
attr[attrname] = fixscope(attribute, new_function)
1143
# Is this a D-Bus method?
1144
elif getattr(attribute, "_dbus_is_method", False):
1145
# Create a new, but exactly alike, function
1146
# object. Decorate it to be a new D-Bus method
1147
# with the alternate D-Bus interface name. Add it
1148
# to the class.
1149
attr[attrname] = (
1150
dbus.service.method(
1151
alt_interface,
1152
attribute._dbus_in_signature,
1153
attribute._dbus_out_signature)
1154
(types.FunctionType(attribute.func_code,
1155
attribute.func_globals,
1156
attribute.func_name,
1157
attribute.func_defaults,
1158
attribute.func_closure)))
1159
# Copy annotations, if any
1160
try:
1161
attr[attrname]._dbus_annotations = dict(
1162
attribute._dbus_annotations)
1163
except AttributeError:
1164
pass
1165
# Is this a D-Bus property?
1166
elif getattr(attribute, "_dbus_is_property", False):
1167
# Create a new, but exactly alike, function
1168
# object, and decorate it to be a new D-Bus
1169
# property with the alternate D-Bus interface
1170
# name. Add it to the class.
1171
attr[attrname] = (dbus_service_property(
1172
alt_interface, attribute._dbus_signature,
1173
attribute._dbus_access,
1174
attribute._dbus_get_args_options
1175
["byte_arrays"])
1176
(types.FunctionType(
1177
attribute.func_code,
1178
attribute.func_globals,
1179
attribute.func_name,
1180
attribute.func_defaults,
1181
attribute.func_closure)))
1182
# Copy annotations, if any
1183
try:
1184
attr[attrname]._dbus_annotations = dict(
1185
attribute._dbus_annotations)
1186
except AttributeError:
1187
pass
1188
# Is this a D-Bus interface?
1189
elif getattr(attribute, "_dbus_is_interface", False):
1190
# Create a new, but exactly alike, function
1191
# object. Decorate it to be a new D-Bus interface
1192
# with the alternate D-Bus interface name. Add it
1193
# to the class.
1194
attr[attrname] = (
1195
dbus_interface_annotations(alt_interface)
1196
(types.FunctionType(attribute.func_code,
1197
attribute.func_globals,
1198
attribute.func_name,
1199
attribute.func_defaults,
1200
attribute.func_closure)))
1201
if deprecate:
1202
# Deprecate all alternate interfaces
1203
iname="_AlternateDBusNames_interface_annotation{}"
1204
for interface_name in interface_names:
1205
1206
@dbus_interface_annotations(interface_name)
1207
def func(self):
1208
return { "org.freedesktop.DBus.Deprecated":
1209
"true" }
1210
# Find an unused name
1211
for aname in (iname.format(i)
1212
for i in itertools.count()):
1213
if aname not in attr:
1214
attr[aname] = func
1215
break
1216
if interface_names:
1217
# Replace the class with a new subclass of it with
1218
# methods, signals, etc. as created above.
1219
cls = type(b"{}Alternate".format(cls.__name__),
1220
(cls, ), attr)
1221
return cls
1222
1223
return wrapper
1224
1225
1226
@alternate_dbus_interfaces({"se.recompile.Mandos":
1227
"se.bsnet.fukt.Mandos"})
1228
class ClientDBus(Client, DBusObjectWithProperties):
1229
"""A Client class using D-Bus
1230
1231
Attributes:
1232
dbus_object_path: dbus.ObjectPath
1233
bus: dbus.SystemBus()
1234
"""
1235
1236
runtime_expansions = (Client.runtime_expansions
1237
+ ("dbus_object_path", ))
1238
1239
_interface = "se.recompile.Mandos.Client"
1240
1241
# dbus.service.Object doesn't use super(), so we can't either.
1242
1243
def __init__(self, bus = None, *args, **kwargs):
1244
self.bus = bus
1245
Client.__init__(self, *args, **kwargs)
1246
# Only now, when this client is initialized, can it show up on
1247
# the D-Bus
1248
client_object_name = str(self.name).translate(
1249
{ord("."): ord("_"),
1250
ord("-"): ord("_")})
1251
self.dbus_object_path = dbus.ObjectPath(
1252
"/clients/" + client_object_name)
1253
DBusObjectWithProperties.__init__(self, self.bus,
1254
self.dbus_object_path)
1255
1256
def notifychangeproperty(transform_func, dbus_name,
1257
type_func=lambda x: x,
1258
variant_level=1,
1259
invalidate_only=False,
1260
_interface=_interface):
1261
""" Modify a variable so that it's a property which announces
1262
its changes to DBus.
1263
1264
transform_fun: Function that takes a value and a variant_level
1265
and transforms it to a D-Bus type.
1266
dbus_name: D-Bus name of the variable
1267
type_func: Function that transform the value before sending it
1268
to the D-Bus. Default: no transform
1269
variant_level: D-Bus variant level. Default: 1
1270
"""
1271
attrname = "_{}".format(dbus_name)
1272
1273
def setter(self, value):
1274
if hasattr(self, "dbus_object_path"):
1275
if (not hasattr(self, attrname) or
1276
type_func(getattr(self, attrname, None))
1277
!= type_func(value)):
1278
if invalidate_only:
1279
self.PropertiesChanged(
1280
_interface, dbus.Dictionary(),
1281
dbus.Array((dbus_name, )))
1282
else:
1283
dbus_value = transform_func(
1284
type_func(value),
1285
variant_level = variant_level)
1286
self.PropertyChanged(dbus.String(dbus_name),
1287
dbus_value)
1288
self.PropertiesChanged(
1289
_interface,
1290
dbus.Dictionary({ dbus.String(dbus_name):
1291
dbus_value }),
1292
dbus.Array())
1293
setattr(self, attrname, value)
1294
1295
return property(lambda self: getattr(self, attrname), setter)
1296
1297
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1298
approvals_pending = notifychangeproperty(dbus.Boolean,
1299
"ApprovalPending",
1300
type_func = bool)
1301
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1302
last_enabled = notifychangeproperty(datetime_to_dbus,
1303
"LastEnabled")
1304
checker = notifychangeproperty(
1305
dbus.Boolean, "CheckerRunning",
1306
type_func = lambda checker: checker is not None)
1307
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1308
"LastCheckedOK")
1309
last_checker_status = notifychangeproperty(dbus.Int16,
1310
"LastCheckerStatus")
1311
last_approval_request = notifychangeproperty(
1312
datetime_to_dbus, "LastApprovalRequest")
1313
approved_by_default = notifychangeproperty(dbus.Boolean,
1314
"ApprovedByDefault")
1315
approval_delay = notifychangeproperty(
1316
dbus.UInt64, "ApprovalDelay",
1317
type_func = lambda td: td.total_seconds() * 1000)
1318
approval_duration = notifychangeproperty(
1319
dbus.UInt64, "ApprovalDuration",
1320
type_func = lambda td: td.total_seconds() * 1000)
1321
host = notifychangeproperty(dbus.String, "Host")
1322
timeout = notifychangeproperty(
1323
dbus.UInt64, "Timeout",
1324
type_func = lambda td: td.total_seconds() * 1000)
1325
extended_timeout = notifychangeproperty(
1326
dbus.UInt64, "ExtendedTimeout",
1327
type_func = lambda td: td.total_seconds() * 1000)
1328
interval = notifychangeproperty(
1329
dbus.UInt64, "Interval",
1330
type_func = lambda td: td.total_seconds() * 1000)
1331
checker_command = notifychangeproperty(dbus.String, "Checker")
1332
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1333
invalidate_only=True)
1334
1335
del notifychangeproperty
1336
1337
def __del__(self, *args, **kwargs):
1338
try:
1339
self.remove_from_connection()
1340
except LookupError:
1341
pass
1342
if hasattr(DBusObjectWithProperties, "__del__"):
1343
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1344
Client.__del__(self, *args, **kwargs)
1345
1346
def checker_callback(self, source, condition,
1347
(connection, command), *args, **kwargs):
1348
ret = Client.checker_callback(self, source, condition,
1349
(connection, command), *args,
1350
**kwargs)
1351
exitstatus = self.last_checker_status
1352
if exitstatus >= 0:
1353
# Emit D-Bus signal
1354
self.CheckerCompleted(dbus.Int16(exitstatus),
1355
dbus.Int64(0),
1356
dbus.String(command))
1357
else:
1358
# Emit D-Bus signal
1359
self.CheckerCompleted(dbus.Int16(-1),
1360
dbus.Int64(
1361
self.last_checker_signal),
1362
dbus.String(command))
1363
return ret
1364
1365
def start_checker(self, *args, **kwargs):
1366
old_checker_pid = getattr(self.checker, "pid", None)
1367
r = Client.start_checker(self, *args, **kwargs)
1368
# Only if new checker process was started
1369
if (self.checker is not None
1370
and old_checker_pid != self.checker.pid):
1371
# Emit D-Bus signal
1372
self.CheckerStarted(self.current_checker_command)
1373
return r
1374
1375
def _reset_approved(self):
1376
self.approved = None
1377
return False
1378
1379
def approve(self, value=True):
1380
self.approved = value
1381
gobject.timeout_add(int(self.approval_duration.total_seconds()
1382
* 1000), self._reset_approved)
1383
self.send_changedstate()
1384
1385
## D-Bus methods, signals & properties
1386
1387
## Interfaces
1388
1389
## Signals
1390
1391
# CheckerCompleted - signal
1392
@dbus.service.signal(_interface, signature="nxs")
1393
def CheckerCompleted(self, exitcode, waitstatus, command):
1394
"D-Bus signal"
1395
pass
1396
1397
# CheckerStarted - signal
1398
@dbus.service.signal(_interface, signature="s")
1399
def CheckerStarted(self, command):
1400
"D-Bus signal"
1401
pass
1402
1403
# PropertyChanged - signal
1404
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1405
@dbus.service.signal(_interface, signature="sv")
1406
def PropertyChanged(self, property, value):
1407
"D-Bus signal"
1408
pass
1409
1410
# GotSecret - signal
1411
@dbus.service.signal(_interface)
1412
def GotSecret(self):
1413
"""D-Bus signal
1414
Is sent after a successful transfer of secret from the Mandos
1415
server to mandos-client
1416
"""
1417
pass
1418
1419
# Rejected - signal
1420
@dbus.service.signal(_interface, signature="s")
1421
def Rejected(self, reason):
1422
"D-Bus signal"
1423
pass
1424
1425
# NeedApproval - signal
1426
@dbus.service.signal(_interface, signature="tb")
1427
def NeedApproval(self, timeout, default):
1428
"D-Bus signal"
1429
return self.need_approval()
1430
1431
## Methods
1432
1433
# Approve - method
1434
@dbus.service.method(_interface, in_signature="b")
1435
def Approve(self, value):
1436
self.approve(value)
1437
1438
# CheckedOK - method
1439
@dbus.service.method(_interface)
1440
def CheckedOK(self):
1441
self.checked_ok()
1442
1443
# Enable - method
1444
@dbus.service.method(_interface)
1445
def Enable(self):
1446
"D-Bus method"
1447
self.enable()
1448
1449
# StartChecker - method
1450
@dbus.service.method(_interface)
1451
def StartChecker(self):
1452
"D-Bus method"
1453
self.start_checker()
1454
1455
# Disable - method
1456
@dbus.service.method(_interface)
1457
def Disable(self):
1458
"D-Bus method"
1459
self.disable()
1460
1461
# StopChecker - method
1462
@dbus.service.method(_interface)
1463
def StopChecker(self):
1464
self.stop_checker()
1465
1466
## Properties
1467
1468
# ApprovalPending - property
1469
@dbus_service_property(_interface, signature="b", access="read")
1470
def ApprovalPending_dbus_property(self):
1471
return dbus.Boolean(bool(self.approvals_pending))
1472
1473
# ApprovedByDefault - property
1474
@dbus_service_property(_interface,
1475
signature="b",
1476
access="readwrite")
1477
def ApprovedByDefault_dbus_property(self, value=None):
1478
if value is None: # get
1479
return dbus.Boolean(self.approved_by_default)
1480
self.approved_by_default = bool(value)
1481
1482
# ApprovalDelay - property
1483
@dbus_service_property(_interface,
1484
signature="t",
1485
access="readwrite")
1486
def ApprovalDelay_dbus_property(self, value=None):
1487
if value is None: # get
1488
return dbus.UInt64(self.approval_delay.total_seconds()
1489
* 1000)
1490
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1491
1492
# ApprovalDuration - property
1493
@dbus_service_property(_interface,
1494
signature="t",
1495
access="readwrite")
1496
def ApprovalDuration_dbus_property(self, value=None):
1497
if value is None: # get
1498
return dbus.UInt64(self.approval_duration.total_seconds()
1499
* 1000)
1500
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1501
1502
# Name - property
1503
@dbus_service_property(_interface, signature="s", access="read")
1504
def Name_dbus_property(self):
1505
return dbus.String(self.name)
1506
1507
# Fingerprint - property
1508
@dbus_service_property(_interface, signature="s", access="read")
1509
def Fingerprint_dbus_property(self):
1510
return dbus.String(self.fingerprint)
1511
1512
# Host - property
1513
@dbus_service_property(_interface,
1514
signature="s",
1515
access="readwrite")
1516
def Host_dbus_property(self, value=None):
1517
if value is None: # get
1518
return dbus.String(self.host)
1519
self.host = str(value)
1520
1521
# Created - property
1522
@dbus_service_property(_interface, signature="s", access="read")
1523
def Created_dbus_property(self):
1524
return datetime_to_dbus(self.created)
1525
1526
# LastEnabled - property
1527
@dbus_service_property(_interface, signature="s", access="read")
1528
def LastEnabled_dbus_property(self):
1529
return datetime_to_dbus(self.last_enabled)
1530
1531
# Enabled - property
1532
@dbus_service_property(_interface,
1533
signature="b",
1534
access="readwrite")
1535
def Enabled_dbus_property(self, value=None):
1536
if value is None: # get
1537
return dbus.Boolean(self.enabled)
1538
if value:
1539
self.enable()
1540
else:
1541
self.disable()
1542
1543
# LastCheckedOK - property
1544
@dbus_service_property(_interface,
1545
signature="s",
1546
access="readwrite")
1547
def LastCheckedOK_dbus_property(self, value=None):
1548
if value is not None:
1549
self.checked_ok()
1550
return
1551
return datetime_to_dbus(self.last_checked_ok)
1552
1553
# LastCheckerStatus - property
1554
@dbus_service_property(_interface, signature="n", access="read")
1555
def LastCheckerStatus_dbus_property(self):
1556
return dbus.Int16(self.last_checker_status)
1557
1558
# Expires - property
1559
@dbus_service_property(_interface, signature="s", access="read")
1560
def Expires_dbus_property(self):
1561
return datetime_to_dbus(self.expires)
1562
1563
# LastApprovalRequest - property
1564
@dbus_service_property(_interface, signature="s", access="read")
1565
def LastApprovalRequest_dbus_property(self):
1566
return datetime_to_dbus(self.last_approval_request)
1567
1568
# Timeout - property
1569
@dbus_service_property(_interface,
1570
signature="t",
1571
access="readwrite")
1572
def Timeout_dbus_property(self, value=None):
1573
if value is None: # get
1574
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1575
old_timeout = self.timeout
1576
self.timeout = datetime.timedelta(0, 0, 0, value)
1577
# Reschedule disabling
1578
if self.enabled:
1579
now = datetime.datetime.utcnow()
1580
self.expires += self.timeout - old_timeout
1581
if self.expires <= now:
1582
# The timeout has passed
1583
self.disable()
1584
else:
1585
if (getattr(self, "disable_initiator_tag", None)
1586
is None):
1587
return
1588
gobject.source_remove(self.disable_initiator_tag)
1589
self.disable_initiator_tag = gobject.timeout_add(
1590
int((self.expires - now).total_seconds() * 1000),
1591
self.disable)
1592
1593
# ExtendedTimeout - property
1594
@dbus_service_property(_interface,
1595
signature="t",
1596
access="readwrite")
1597
def ExtendedTimeout_dbus_property(self, value=None):
1598
if value is None: # get
1599
return dbus.UInt64(self.extended_timeout.total_seconds()
1600
* 1000)
1601
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1602
1603
# Interval - property
1604
@dbus_service_property(_interface,
1605
signature="t",
1606
access="readwrite")
1607
def Interval_dbus_property(self, value=None):
1608
if value is None: # get
1609
return dbus.UInt64(self.interval.total_seconds() * 1000)
1610
self.interval = datetime.timedelta(0, 0, 0, value)
1611
if getattr(self, "checker_initiator_tag", None) is None:
1612
return
1613
if self.enabled:
1614
# Reschedule checker run
1615
gobject.source_remove(self.checker_initiator_tag)
1616
self.checker_initiator_tag = gobject.timeout_add(
1617
value, self.start_checker)
1618
self.start_checker() # Start one now, too
1619
1620
# Checker - property
1621
@dbus_service_property(_interface,
1622
signature="s",
1623
access="readwrite")
1624
def Checker_dbus_property(self, value=None):
1625
if value is None: # get
1626
return dbus.String(self.checker_command)
1627
self.checker_command = str(value)
1628
1629
# CheckerRunning - property
1630
@dbus_service_property(_interface,
1631
signature="b",
1632
access="readwrite")
1633
def CheckerRunning_dbus_property(self, value=None):
1634
if value is None: # get
1635
return dbus.Boolean(self.checker is not None)
1636
if value:
1637
self.start_checker()
1638
else:
1639
self.stop_checker()
1640
1641
# ObjectPath - property
1642
@dbus_service_property(_interface, signature="o", access="read")
1643
def ObjectPath_dbus_property(self):
1644
return self.dbus_object_path # is already a dbus.ObjectPath
1645
1646
# Secret = property
1647
@dbus_service_property(_interface,
1648
signature="ay",
1649
access="write",
1650
byte_arrays=True)
1651
def Secret_dbus_property(self, value):
1652
self.secret = bytes(value)
1653
1654
del _interface
1655
1656
1657
class ProxyClient(object):
1658
def __init__(self, child_pipe, fpr, address):
1659
self._pipe = child_pipe
1660
self._pipe.send(('init', fpr, address))
1661
if not self._pipe.recv():
1662
raise KeyError()
1663
1664
def __getattribute__(self, name):
1665
if name == '_pipe':
1666
return super(ProxyClient, self).__getattribute__(name)
1667
self._pipe.send(('getattr', name))
1668
data = self._pipe.recv()
1669
if data[0] == 'data':
1670
return data[1]
1671
if data[0] == 'function':
1672
1673
def func(*args, **kwargs):
1674
self._pipe.send(('funcall', name, args, kwargs))
1675
return self._pipe.recv()[1]
1676
1677
return func
1678
1679
def __setattr__(self, name, value):
1680
if name == '_pipe':
1681
return super(ProxyClient, self).__setattr__(name, value)
1682
self._pipe.send(('setattr', name, value))
1683
1684
1685
class ClientHandler(socketserver.BaseRequestHandler, object):
1686
"""A class to handle client connections.
1687
1688
Instantiated once for each connection to handle it.
371
def still_valid(self):
372
"""Has the timeout not yet passed for this client?"""
373
now = datetime.datetime.now()
374
if self.last_checked_ok is None:
375
return now < (self.created + self.timeout)
376
else:
377
return now < (self.last_checked_ok + self.timeout)
378
379
380
def peer_certificate(session):
381
"Return the peer's OpenPGP certificate as a bytestring"
382
# If not an OpenPGP certificate...
383
if gnutls.library.functions.gnutls_certificate_type_get\
384
(session._c_object) \
385
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
386
# ...do the normal thing
387
return session.peer_certificate
388
list_size = ctypes.c_uint()
389
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
390
(session._c_object, ctypes.byref(list_size))
391
if list_size.value == 0:
392
return None
393
cert = cert_list[0]
394
return ctypes.string_at(cert.data, cert.size)
395
396
397
def fingerprint(openpgp):
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
399
# New empty GnuTLS certificate
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
401
gnutls.library.functions.gnutls_openpgp_crt_init\
402
(ctypes.byref(crt))
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# Import the OpenPGP public key into the certificate
409
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
410
(crt,
411
ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# New buffer for the fingerprint
414
buffer = ctypes.create_string_buffer(20)
415
buffer_length = ctypes.c_size_t()
416
# Get the fingerprint from the certificate into the buffer
417
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
418
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
419
# Deinit the certificate
420
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
421
# Convert the buffer to a Python bytestring
422
fpr = ctypes.string_at(buffer, buffer_length.value)
423
# Convert the bytestring to hexadecimal notation
424
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
425
return hex_fpr
426
427
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
429
"""A TCP request handler class.
430
Instantiated by IPv6_TCPServer for each request to handle it.
1689
431
Note: This will run in its own forked process."""
1690
432
1691
433
def handle(self):
1692
with contextlib.closing(self.server.child_pipe) as child_pipe:
1693
logger.info("TCP connection from: %s",
1694
str(self.client_address))
1695
logger.debug("Pipe FD: %d",
1696
self.server.child_pipe.fileno())
1697
1698
session = gnutls.connection.ClientSession(
1699
self.request, gnutls.connection .X509Credentials())
1700
1701
# Note: gnutls.connection.X509Credentials is really a
1702
# generic GnuTLS certificate credentials object so long as
1703
# no X.509 keys are added to it. Therefore, we can use it
1704
# here despite using OpenPGP certificates.
1705
1706
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1707
# "+AES-256-CBC", "+SHA1",
1708
# "+COMP-NULL", "+CTYPE-OPENPGP",
1709
# "+DHE-DSS"))
1710
# Use a fallback default, since this MUST be set.
1711
priority = self.server.gnutls_priority
1712
if priority is None:
1713
priority = "NORMAL"
1714
gnutls.library.functions.gnutls_priority_set_direct(
1715
session._c_object, priority, None)
1716
1717
# Start communication using the Mandos protocol
1718
# Get protocol number
1719
line = self.request.makefile().readline()
1720
logger.debug("Protocol version: %r", line)
1721
try:
1722
if int(line.strip().split()[0]) > 1:
1723
raise RuntimeError(line)
1724
except (ValueError, IndexError, RuntimeError) as error:
1725
logger.error("Unknown protocol version: %s", error)
1726
return
1727
1728
# Start GnuTLS connection
1729
try:
1730
session.handshake()
1731
except gnutls.errors.GNUTLSError as error:
1732
logger.warning("Handshake failed: %s", error)
1733
# Do not run session.bye() here: the session is not
1734
# established. Just abandon the request.
1735
return
1736
logger.debug("Handshake succeeded")
1737
1738
approval_required = False
1739
try:
1740
try:
1741
fpr = self.fingerprint(
1742
self.peer_certificate(session))
1743
except (TypeError,
1744
gnutls.errors.GNUTLSError) as error:
1745
logger.warning("Bad certificate: %s", error)
1746
return
1747
logger.debug("Fingerprint: %s", fpr)
1748
1749
try:
1750
client = ProxyClient(child_pipe, fpr,
1751
self.client_address)
1752
except KeyError:
1753
return
1754
1755
if client.approval_delay:
1756
delay = client.approval_delay
1757
client.approvals_pending += 1
1758
approval_required = True
1759
1760
while True:
1761
if not client.enabled:
1762
logger.info("Client %s is disabled",
1763
client.name)
1764
if self.server.use_dbus:
1765
# Emit D-Bus signal
1766
client.Rejected("Disabled")
1767
return
1768
1769
if client.approved or not client.approval_delay:
1770
#We are approved or approval is disabled
1771
break
1772
elif client.approved is None:
1773
logger.info("Client %s needs approval",
1774
client.name)
1775
if self.server.use_dbus:
1776
# Emit D-Bus signal
1777
client.NeedApproval(
1778
client.approval_delay.total_seconds()
1779
* 1000, client.approved_by_default)
1780
else:
1781
logger.warning("Client %s was not approved",
1782
client.name)
1783
if self.server.use_dbus:
1784
# Emit D-Bus signal
1785
client.Rejected("Denied")
1786
return
1787
1788
#wait until timeout or approved
1789
time = datetime.datetime.now()
1790
client.changedstate.acquire()
1791
client.changedstate.wait(delay.total_seconds())
1792
client.changedstate.release()
1793
time2 = datetime.datetime.now()
1794
if (time2 - time) >= delay:
1795
if not client.approved_by_default:
1796
logger.warning("Client %s timed out while"
1797
" waiting for approval",
1798
client.name)
1799
if self.server.use_dbus:
1800
# Emit D-Bus signal
1801
client.Rejected("Approval timed out")
1802
return
1803
else:
1804
break
1805
else:
1806
delay -= time2 - time
1807
1808
sent_size = 0
1809
while sent_size < len(client.secret):
1810
try:
1811
sent = session.send(client.secret[sent_size:])
1812
except gnutls.errors.GNUTLSError as error:
1813
logger.warning("gnutls send failed",
1814
exc_info=error)
1815
return
1816
logger.debug("Sent: %d, remaining: %d", sent,
1817
len(client.secret) - (sent_size
1818
+ sent))
1819
sent_size += sent
1820
1821
logger.info("Sending secret to %s", client.name)
1822
# bump the timeout using extended_timeout
1823
client.bump_timeout(client.extended_timeout)
1824
if self.server.use_dbus:
1825
# Emit D-Bus signal
1826
client.GotSecret()
1827
1828
finally:
1829
if approval_required:
1830
client.approvals_pending -= 1
1831
try:
1832
session.bye()
1833
except gnutls.errors.GNUTLSError as error:
1834
logger.warning("GnuTLS bye failed",
1835
exc_info=error)
1836
1837
@staticmethod
1838
def peer_certificate(session):
1839
"Return the peer's OpenPGP certificate as a bytestring"
1840
# If not an OpenPGP certificate...
1841
if (gnutls.library.functions.gnutls_certificate_type_get(
1842
session._c_object)
1843
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1844
# ...do the normal thing
1845
return session.peer_certificate
1846
list_size = ctypes.c_uint(1)
1847
cert_list = (gnutls.library.functions
1848
.gnutls_certificate_get_peers
1849
(session._c_object, ctypes.byref(list_size)))
1850
if not bool(cert_list) and list_size.value != 0:
1851
raise gnutls.errors.GNUTLSError("error getting peer"
1852
" certificate")
1853
if list_size.value == 0:
1854
return None
1855
cert = cert_list[0]
1856
return ctypes.string_at(cert.data, cert.size)
1857
1858
@staticmethod
1859
def fingerprint(openpgp):
1860
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1861
# New GnuTLS "datum" with the OpenPGP public key
1862
datum = gnutls.library.types.gnutls_datum_t(
1863
ctypes.cast(ctypes.c_char_p(openpgp),
1864
ctypes.POINTER(ctypes.c_ubyte)),
1865
ctypes.c_uint(len(openpgp)))
1866
# New empty GnuTLS certificate
1867
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1868
gnutls.library.functions.gnutls_openpgp_crt_init(
1869
ctypes.byref(crt))
1870
# Import the OpenPGP public key into the certificate
1871
gnutls.library.functions.gnutls_openpgp_crt_import(
1872
crt, ctypes.byref(datum),
1873
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1874
# Verify the self signature in the key
1875
crtverify = ctypes.c_uint()
1876
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1877
crt, 0, ctypes.byref(crtverify))
1878
if crtverify.value != 0:
1879
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1880
raise gnutls.errors.CertificateSecurityError(
1881
"Verify failed")
1882
# New buffer for the fingerprint
1883
buf = ctypes.create_string_buffer(20)
1884
buf_len = ctypes.c_size_t()
1885
# Get the fingerprint from the certificate into the buffer
1886
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1887
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1888
# Deinit the certificate
1889
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1890
# Convert the buffer to a Python bytestring
1891
fpr = ctypes.string_at(buf, buf_len.value)
1892
# Convert the bytestring to hexadecimal notation
1893
hex_fpr = binascii.hexlify(fpr).upper()
1894
return hex_fpr
1895
1896
1897
class MultiprocessingMixIn(object):
1898
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1899
1900
def sub_process_main(self, request, address):
1901
try:
1902
self.finish_request(request, address)
1903
except Exception:
1904
self.handle_error(request, address)
1905
self.close_request(request)
1906
1907
def process_request(self, request, address):
1908
"""Start a new process to process the request."""
1909
proc = multiprocessing.Process(target = self.sub_process_main,
1910
args = (request, address))
1911
proc.start()
1912
return proc
1913
1914
1915
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1916
""" adds a pipe to the MixIn """
1917
1918
def process_request(self, request, client_address):
1919
"""Overrides and wraps the original process_request().
1920
1921
This function creates a new pipe in self.pipe
1922
"""
1923
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1924
1925
proc = MultiprocessingMixIn.process_request(self, request,
1926
client_address)
1927
self.child_pipe.close()
1928
self.add_pipe(parent_pipe, proc)
1929
1930
def add_pipe(self, parent_pipe, proc):
1931
"""Dummy function; override as necessary"""
1932
raise NotImplementedError()
1933
1934
1935
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1936
socketserver.TCPServer, object):
1937
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1938
434
logger.debug(u"TCP connection from: %s",
435
unicode(self.client_address))
436
session = gnutls.connection.ClientSession\
437
(self.request, gnutls.connection.X509Credentials())
438
439
line = self.request.makefile().readline()
440
logger.debug(u"Protocol version: %r", line)
441
try:
442
if int(line.strip().split()[0]) > 1:
443
raise RuntimeError
444
except (ValueError, IndexError, RuntimeError), error:
445
logger.error(u"Unknown protocol version: %s", error)
446
return
447
448
# Note: gnutls.connection.X509Credentials is really a generic
449
# GnuTLS certificate credentials object so long as no X.509
450
# keys are added to it. Therefore, we can use it here despite
451
# using OpenPGP certificates.
452
453
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
454
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
455
# "+DHE-DSS"))
456
priority = "NORMAL" # Fallback default, since this
457
# MUST be set.
458
if self.server.settings["priority"]:
459
priority = self.server.settings["priority"]
460
gnutls.library.functions.gnutls_priority_set_direct\
461
(session._c_object, priority, None);
462
463
try:
464
session.handshake()
465
except gnutls.errors.GNUTLSError, error:
466
logger.debug(u"Handshake failed: %s", error)
467
# Do not run session.bye() here: the session is not
468
# established. Just abandon the request.
469
return
470
try:
471
fpr = fingerprint(peer_certificate(session))
472
except (TypeError, gnutls.errors.GNUTLSError), error:
473
logger.debug(u"Bad certificate: %s", error)
474
session.bye()
475
return
476
logger.debug(u"Fingerprint: %s", fpr)
477
client = None
478
for c in self.server.clients:
479
if c.fingerprint == fpr:
480
client = c
481
break
482
if not client:
483
logger.debug(u"Client not found for fingerprint: %s", fpr)
484
session.bye()
485
return
486
# Have to check if client.still_valid(), since it is possible
487
# that the client timed out while establishing the GnuTLS
488
# session.
489
if not client.still_valid():
490
logger.debug(u"Client %(name)s is invalid", vars(client))
491
session.bye()
492
return
493
sent_size = 0
494
while sent_size < len(client.secret):
495
sent = session.send(client.secret[sent_size:])
496
logger.debug(u"Sent: %d, remaining: %d",
497
sent, len(client.secret)
498
- (sent_size + sent))
499
sent_size += sent
500
session.bye()
501
502
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1939
505
Attributes:
1940
enabled: Boolean; whether this server is activated yet
1941
interface: None or a network interface name (string)
1942
use_ipv6: Boolean; to use IPv6 or not
506
settings: Server settings
507
clients: Set() of Client objects
1943
508
"""
1944
1945
def __init__(self, server_address, RequestHandlerClass,
1946
interface=None,
1947
use_ipv6=True,
1948
socketfd=None):
1949
"""If socketfd is set, use that file descriptor instead of
1950
creating a new one with socket.socket().
1951
"""
1952
self.interface = interface
1953
if use_ipv6:
1954
self.address_family = socket.AF_INET6
1955
if socketfd is not None:
1956
# Save the file descriptor
1957
self.socketfd = socketfd
1958
# Save the original socket.socket() function
1959
self.socket_socket = socket.socket
1960
# To implement --socket, we monkey patch socket.socket.
1961
#
1962
# (When socketserver.TCPServer is a new-style class, we
1963
# could make self.socket into a property instead of monkey
1964
# patching socket.socket.)
1965
#
1966
# Create a one-time-only replacement for socket.socket()
1967
@functools.wraps(socket.socket)
1968
def socket_wrapper(*args, **kwargs):
1969
# Restore original function so subsequent calls are
1970
# not affected.
1971
socket.socket = self.socket_socket
1972
del self.socket_socket
1973
# This time only, return a new socket object from the
1974
# saved file descriptor.
1975
return socket.fromfd(self.socketfd, *args, **kwargs)
1976
# Replace socket.socket() function with wrapper
1977
socket.socket = socket_wrapper
1978
# The socketserver.TCPServer.__init__ will call
1979
# socket.socket(), which might be our replacement,
1980
# socket_wrapper(), if socketfd was set.
1981
socketserver.TCPServer.__init__(self, server_address,
1982
RequestHandlerClass)
1983
509
address_family = socket.AF_INET6
510
def __init__(self, *args, **kwargs):
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
514
if "clients" in kwargs:
515
self.clients = kwargs["clients"]
516
del kwargs["clients"]
517
return super(type(self), self).__init__(*args, **kwargs)
1984
518
def server_bind(self):
1985
519
"""This overrides the normal server_bind() function
1986
520
to bind to an interface if one was specified, and also NOT to
1987
521
bind to an address or port if they were not specified."""
1988
if self.interface is not None:
1989
if SO_BINDTODEVICE is None:
1990
logger.error("SO_BINDTODEVICE does not exist;"
1991
" cannot bind to interface %s",
1992
self.interface)
1993
else:
1994
try:
1995
self.socket.setsockopt(
1996
socket.SOL_SOCKET, SO_BINDTODEVICE,
1997
(self.interface + "\0").encode("utf-8"))
1998
except socket.error as error:
1999
if error.errno == errno.EPERM:
2000
logger.error("No permission to bind to"
2001
" interface %s", self.interface)
2002
elif error.errno == errno.ENOPROTOOPT:
2003
logger.error("SO_BINDTODEVICE not available;"
2004
" cannot bind to interface %s",
2005
self.interface)
2006
elif error.errno == errno.ENODEV:
2007
logger.error("Interface %s does not exist,"
2008
" cannot bind", self.interface)
2009
else:
2010
raise
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
525
try:
526
self.socket.setsockopt(socket.SOL_SOCKET,
527
SO_BINDTODEVICE,
528
self.settings["interface"])
529
except socket.error, error:
530
if error[0] == errno.EPERM:
531
logger.warning(u"No permission to"
532
u" bind to interface %s",
533
self.settings["interface"])
534
else:
535
raise error
2011
536
# Only bind(2) the socket if we really need to.
2012
537
if self.server_address[0] or self.server_address[1]:
2013
538
if not self.server_address[0]:
2014
if self.address_family == socket.AF_INET6:
2015
any_address = "::" # in6addr_any
2016
else:
2017
any_address = "0.0.0.0" # INADDR_ANY
2018
self.server_address = (any_address,
539
in6addr_any = "::"
540
self.server_address = (in6addr_any,
2019
541
self.server_address[1])
2020
elif not self.server_address[1]:
2021
self.server_address = (self.server_address[0], 0)
2022
# if self.interface:
2023
# self.server_address = (self.server_address[0],
2024
# 0, # port
2025
# 0, # flowinfo
2026
# if_nametoindex
2027
# (self.interface))
2028
return socketserver.TCPServer.server_bind(self)
2029
2030
2031
class MandosServer(IPv6_TCPServer):
2032
"""Mandos server.
2033
2034
Attributes:
2035
clients: set of Client objects
2036
gnutls_priority GnuTLS priority string
2037
use_dbus: Boolean; to emit D-Bus signals or not
2038
2039
Assumes a gobject.MainLoop event loop.
2040
"""
2041
2042
def __init__(self, server_address, RequestHandlerClass,
2043
interface=None,
2044
use_ipv6=True,
2045
clients=None,
2046
gnutls_priority=None,
2047
use_dbus=True,
2048
socketfd=None):
2049
self.enabled = False
2050
self.clients = clients
2051
if self.clients is None:
2052
self.clients = {}
2053
self.use_dbus = use_dbus
2054
self.gnutls_priority = gnutls_priority
2055
IPv6_TCPServer.__init__(self, server_address,
2056
RequestHandlerClass,
2057
interface = interface,
2058
use_ipv6 = use_ipv6,
2059
socketfd = socketfd)
2060
2061
def server_activate(self):
2062
if self.enabled:
2063
return socketserver.TCPServer.server_activate(self)
2064
2065
def enable(self):
2066
self.enabled = True
2067
2068
def add_pipe(self, parent_pipe, proc):
2069
# Call "handle_ipc" for both data and EOF events
2070
gobject.io_add_watch(
2071
parent_pipe.fileno(),
2072
gobject.IO_IN | gobject.IO_HUP,
2073
functools.partial(self.handle_ipc,
2074
parent_pipe = parent_pipe,
2075
proc = proc))
2076
2077
def handle_ipc(self, source, condition,
2078
parent_pipe=None,
2079
proc = None,
2080
client_object=None):
2081
# error, or the other end of multiprocessing.Pipe has closed
2082
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2083
# Wait for other process to exit
2084
proc.join()
2085
return False
2086
2087
# Read a request from the child
2088
request = parent_pipe.recv()
2089
command = request[0]
2090
2091
if command == 'init':
2092
fpr = request[1]
2093
address = request[2]
2094
2095
for c in self.clients.itervalues():
2096
if c.fingerprint == fpr:
2097
client = c
2098
break
2099
else:
2100
logger.info("Client not found for fingerprint: %s, ad"
2101
"dress: %s", fpr, address)
2102
if self.use_dbus:
2103
# Emit D-Bus signal
2104
mandos_dbus_service.ClientNotFound(fpr,
2105
address[0])
2106
parent_pipe.send(False)
2107
return False
2108
2109
gobject.io_add_watch(
2110
parent_pipe.fileno(),
2111
gobject.IO_IN | gobject.IO_HUP,
2112
functools.partial(self.handle_ipc,
2113
parent_pipe = parent_pipe,
2114
proc = proc,
2115
client_object = client))
2116
parent_pipe.send(True)
2117
# remove the old hook in favor of the new above hook on
2118
# same fileno
2119
return False
2120
if command == 'funcall':
2121
funcname = request[1]
2122
args = request[2]
2123
kwargs = request[3]
2124
2125
parent_pipe.send(('data', getattr(client_object,
2126
funcname)(*args,
2127
**kwargs)))
2128
2129
if command == 'getattr':
2130
attrname = request[1]
2131
if callable(client_object.__getattribute__(attrname)):
2132
parent_pipe.send(('function', ))
2133
else:
2134
parent_pipe.send((
2135
'data', client_object.__getattribute__(attrname)))
2136
2137
if command == 'setattr':
2138
attrname = request[1]
2139
value = request[2]
2140
setattr(client_object, attrname, value)
2141
2142
return True
2143
2144
2145
def rfc3339_duration_to_delta(duration):
2146
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2147
2148
>>> rfc3339_duration_to_delta("P7D")
2149
datetime.timedelta(7)
2150
>>> rfc3339_duration_to_delta("PT60S")
2151
datetime.timedelta(0, 60)
2152
>>> rfc3339_duration_to_delta("PT60M")
2153
datetime.timedelta(0, 3600)
2154
>>> rfc3339_duration_to_delta("PT24H")
2155
datetime.timedelta(1)
2156
>>> rfc3339_duration_to_delta("P1W")
2157
datetime.timedelta(7)
2158
>>> rfc3339_duration_to_delta("PT5M30S")
2159
datetime.timedelta(0, 330)
2160
>>> rfc3339_duration_to_delta("P1DT3M20S")
2161
datetime.timedelta(1, 200)
2162
"""
2163
2164
# Parsing an RFC 3339 duration with regular expressions is not
2165
# possible - there would have to be multiple places for the same
2166
# values, like seconds. The current code, while more esoteric, is
2167
# cleaner without depending on a parsing library. If Python had a
2168
# built-in library for parsing we would use it, but we'd like to
2169
# avoid excessive use of external libraries.
2170
2171
# New type for defining tokens, syntax, and semantics all-in-one
2172
Token = collections.namedtuple("Token",
2173
("regexp", # To match token; if
2174
# "value" is not None,
2175
# must have a "group"
2176
# containing digits
2177
"value", # datetime.timedelta or
2178
# None
2179
"followers")) # Tokens valid after
2180
# this token
2181
Token = collections.namedtuple("Token", (
2182
"regexp", # To match token; if "value" is not None, must have
2183
# a "group" containing digits
2184
"value", # datetime.timedelta or None
2185
"followers")) # Tokens valid after this token
2186
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2187
# the "duration" ABNF definition in RFC 3339, Appendix A.
2188
token_end = Token(re.compile(r"$"), None, frozenset())
2189
token_second = Token(re.compile(r"(\d+)S"),
2190
datetime.timedelta(seconds=1),
2191
frozenset((token_end, )))
2192
token_minute = Token(re.compile(r"(\d+)M"),
2193
datetime.timedelta(minutes=1),
2194
frozenset((token_second, token_end)))
2195
token_hour = Token(re.compile(r"(\d+)H"),
2196
datetime.timedelta(hours=1),
2197
frozenset((token_minute, token_end)))
2198
token_time = Token(re.compile(r"T"),
2199
None,
2200
frozenset((token_hour, token_minute,
2201
token_second)))
2202
token_day = Token(re.compile(r"(\d+)D"),
2203
datetime.timedelta(days=1),
2204
frozenset((token_time, token_end)))
2205
token_month = Token(re.compile(r"(\d+)M"),
2206
datetime.timedelta(weeks=4),
2207
frozenset((token_day, token_end)))
2208
token_year = Token(re.compile(r"(\d+)Y"),
2209
datetime.timedelta(weeks=52),
2210
frozenset((token_month, token_end)))
2211
token_week = Token(re.compile(r"(\d+)W"),
2212
datetime.timedelta(weeks=1),
2213
frozenset((token_end, )))
2214
token_duration = Token(re.compile(r"P"), None,
2215
frozenset((token_year, token_month,
2216
token_day, token_time,
2217
token_week)))
2218
# Define starting values
2219
value = datetime.timedelta() # Value so far
2220
found_token = None
2221
followers = frozenset((token_duration,)) # Following valid tokens
2222
s = duration # String left to parse
2223
# Loop until end token is found
2224
while found_token is not token_end:
2225
# Search for any currently valid tokens
2226
for token in followers:
2227
match = token.regexp.match(s)
2228
if match is not None:
2229
# Token found
2230
if token.value is not None:
2231
# Value found, parse digits
2232
factor = int(match.group(1), 10)
2233
# Add to value so far
2234
value += factor * token.value
2235
# Strip token from string
2236
s = token.regexp.sub("", s, 1)
2237
# Go to found token
2238
found_token = token
2239
# Set valid next tokens
2240
followers = found_token.followers
2241
break
2242
else:
2243
# No currently valid tokens were found
2244
raise ValueError("Invalid RFC 3339 duration")
2245
# End token found
2246
return value
542
elif self.server_address[1] is None:
543
self.server_address = (self.server_address[0],
544
0)
545
return super(type(self), self).server_bind()
2247
546
2248
547
2249
548
def string_to_delta(interval):
2250
549
"""Parse a string and return a datetime.timedelta
2251
550
2252
551
>>> string_to_delta('7d')
2253
552
datetime.timedelta(7)
2254
553
>>> string_to_delta('60s')
2257
556
datetime.timedelta(0, 3600)
2258
557
>>> string_to_delta('24h')
2259
558
datetime.timedelta(1)
2260
>>> string_to_delta('1w')
559
>>> string_to_delta(u'1w')
2261
560
datetime.timedelta(7)
2262
>>> string_to_delta('5m 30s')
2263
datetime.timedelta(0, 330)
2264
561
"""
2265
2266
try:
2267
return rfc3339_duration_to_delta(interval)
2268
except ValueError:
2269
pass
2270
2271
timevalue = datetime.timedelta(0)
2272
for s in interval.split():
2273
try:
2274
suffix = s[-1]
2275
value = int(s[:-1])
2276
if suffix == "d":
2277
delta = datetime.timedelta(value)
2278
elif suffix == "s":
2279
delta = datetime.timedelta(0, value)
2280
elif suffix == "m":
2281
delta = datetime.timedelta(0, 0, 0, 0, value)
2282
elif suffix == "h":
2283
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2284
elif suffix == "w":
2285
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2286
else:
2287
raise ValueError("Unknown suffix {!r}".format(suffix))
2288
except IndexError as e:
2289
raise ValueError(*(e.args))
2290
timevalue += delta
2291
return timevalue
2292
2293
2294
def daemon(nochdir = False, noclose = False):
562
try:
563
suffix=unicode(interval[-1])
564
value=int(interval[:-1])
565
if suffix == u"d":
566
delta = datetime.timedelta(value)
567
elif suffix == u"s":
568
delta = datetime.timedelta(0, value)
569
elif suffix == u"m":
570
delta = datetime.timedelta(0, 0, 0, 0, value)
571
elif suffix == u"h":
572
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
elif suffix == u"w":
574
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
else:
576
raise ValueError
577
except (ValueError, IndexError):
578
raise ValueError
579
return delta
580
581
582
def server_state_changed(state):
583
"""Derived from the Avahi example code"""
584
if state == avahi.SERVER_COLLISION:
585
logger.warning(u"Server name collision")
586
service.remove()
587
elif state == avahi.SERVER_RUNNING:
588
service.add()
589
590
591
def entry_group_state_changed(state, error):
592
"""Derived from the Avahi example code"""
593
logger.debug(u"state change: %i", state)
594
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
logger.debug(u"Service established.")
597
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
600
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
604
605
def if_nametoindex(interface):
606
"""Call the C function if_nametoindex(), or equivalent"""
607
global if_nametoindex
608
try:
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
613
except (OSError, AttributeError):
614
if "struct" not in sys.modules:
615
import struct
616
if "fcntl" not in sys.modules:
617
import fcntl
618
def if_nametoindex(interface):
619
"Get an interface index the hard way, i.e. using fcntl()"
620
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
626
return interface_index
627
return if_nametoindex(interface)
628
629
630
def daemon(nochdir, noclose):
2295
631
"""See daemon(3). Standard BSD Unix function.
2296
2297
632
This should really exist as os.daemon, but it doesn't (yet)."""
2298
633
if os.fork():
2299
634
sys.exit()
2300
635
os.setsid()
2301
636
if not nochdir:
2302
637
os.chdir("/")
2303
if os.fork():
2304
sys.exit()
2305
638
if not noclose:
2306
639
# Close all standard open file descriptors
2307
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
640
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2308
641
if not stat.S_ISCHR(os.fstat(null).st_mode):
2309
642
raise OSError(errno.ENODEV,
2310
"{} not a character device"
2311
.format(os.devnull))
643
"/dev/null not a character device")
2312
644
os.dup2(null, sys.stdin.fileno())
2313
645
os.dup2(null, sys.stdout.fileno())
2314
646
os.dup2(null, sys.stderr.fileno())
2317
649
2318
650
2319
651
def main():
2320
2321
##################################################################
2322
# Parsing of options, both command line and config file
2323
2324
parser = argparse.ArgumentParser()
2325
parser.add_argument("-v", "--version", action="version",
2326
version = "%(prog)s {}".format(version),
2327
help="show version number and exit")
2328
parser.add_argument("-i", "--interface", metavar="IF",
2329
help="Bind to interface IF")
2330
parser.add_argument("-a", "--address",
2331
help="Address to listen for requests on")
2332
parser.add_argument("-p", "--port", type=int,
2333
help="Port number to receive requests on")
2334
parser.add_argument("--check", action="store_true",
2335
help="Run self-test")
2336
parser.add_argument("--debug", action="store_true",
2337
help="Debug mode; run in foreground and log"
2338
" to terminal", default=None)
2339
parser.add_argument("--debuglevel", metavar="LEVEL",
2340
help="Debug level for stdout output")
2341
parser.add_argument("--priority", help="GnuTLS"
2342
" priority string (see GnuTLS documentation)")
2343
parser.add_argument("--servicename",
2344
metavar="NAME", help="Zeroconf service name")
2345
parser.add_argument("--configdir",
2346
default="/etc/mandos", metavar="DIR",
2347
help="Directory to search for configuration"
2348
" files")
2349
parser.add_argument("--no-dbus", action="store_false",
2350
dest="use_dbus", help="Do not provide D-Bus"
2351
" system bus interface", default=None)
2352
parser.add_argument("--no-ipv6", action="store_false",
2353
dest="use_ipv6", help="Do not use IPv6",
2354
default=None)
2355
parser.add_argument("--no-restore", action="store_false",
2356
dest="restore", help="Do not restore stored"
2357
" state", default=None)
2358
parser.add_argument("--socket", type=int,
2359
help="Specify a file descriptor to a network"
2360
" socket to use instead of creating one")
2361
parser.add_argument("--statedir", metavar="DIR",
2362
help="Directory to save/restore state in")
2363
parser.add_argument("--foreground", action="store_true",
2364
help="Run in foreground", default=None)
2365
parser.add_argument("--no-zeroconf", action="store_false",
2366
dest="zeroconf", help="Do not use Zeroconf",
2367
default=None)
2368
2369
options = parser.parse_args()
652
global main_loop_started
653
main_loop_started = False
654
655
parser = OptionParser()
656
parser.add_option("-i", "--interface", type="string",
657
metavar="IF", help="Bind to interface IF")
658
parser.add_option("-a", "--address", type="string",
659
help="Address to listen for requests on")
660
parser.add_option("-p", "--port", type="int",
661
help="Port number to receive requests on")
662
parser.add_option("--check", action="store_true", default=False,
663
help="Run self-test")
664
parser.add_option("--debug", action="store_true", default=False,
665
help="Debug mode; run in foreground and log to"
666
" terminal")
667
parser.add_option("--priority", type="string", help="GnuTLS"
668
" priority string (see GnuTLS documentation)")
669
parser.add_option("--servicename", type="string", metavar="NAME",
670
help="Zeroconf service name")
671
parser.add_option("--configdir", type="string",
672
default="/etc/mandos", metavar="DIR",
673
help="Directory to search for configuration"
674
" files")
675
(options, args) = parser.parse_args()
2370
676
2371
677
if options.check:
2372
678
import doctest
2373
fail_count, test_count = doctest.testmod()
2374
sys.exit(os.EX_OK if fail_count == 0 else 1)
679
doctest.testmod()
680
sys.exit()
2375
681
2376
682
# Default values for config file for server-global settings
2377
683
server_defaults = { "interface": "",
2379
685
"port": "",
2380
686
"debug": "False",
2381
687
"priority":
2382
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2383
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
688
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2384
689
"servicename": "Mandos",
2385
"use_dbus": "True",
2386
"use_ipv6": "True",
2387
"debuglevel": "",
2388
"restore": "True",
2389
"socket": "",
2390
"statedir": "/var/lib/mandos",
2391
"foreground": "False",
2392
"zeroconf": "True",
2393
}
690
}
2394
691
2395
692
# Parse config file for server-global settings
2396
server_config = configparser.SafeConfigParser(server_defaults)
693
server_config = ConfigParser.SafeConfigParser(server_defaults)
2397
694
del server_defaults
2398
server_config.read(os.path.join(options.configdir, "mandos.conf"))
695
server_config.read(os.path.join(options.configdir, "server.conf"))
696
server_section = "server"
2399
697
# Convert the SafeConfigParser object to a dict
2400
server_settings = server_config.defaults()
2401
# Use the appropriate methods on the non-string config options
2402
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2403
server_settings[option] = server_config.getboolean("DEFAULT",
2404
option)
2405
if server_settings["port"]:
2406
server_settings["port"] = server_config.getint("DEFAULT",
2407
"port")
2408
if server_settings["socket"]:
2409
server_settings["socket"] = server_config.getint("DEFAULT",
2410
"socket")
2411
# Later, stdin will, and stdout and stderr might, be dup'ed
2412
# over with an opened os.devnull. But we don't want this to
2413
# happen with a supplied network socket.
2414
if 0 <= server_settings["socket"] <= 2:
2415
server_settings["socket"] = os.dup(server_settings
2416
["socket"])
698
server_settings = dict(server_config.items(server_section))
699
# Use getboolean on the boolean config option
700
server_settings["debug"] = server_config.getboolean\
701
(server_section, "debug")
2417
702
del server_config
2418
703
2419
704
# Override the settings from the config file with command line
2420
705
# options, if set.
2421
706
for option in ("interface", "address", "port", "debug",
2422
"priority", "servicename", "configdir", "use_dbus",
2423
"use_ipv6", "debuglevel", "restore", "statedir",
2424
"socket", "foreground", "zeroconf"):
707
"priority", "servicename", "configdir"):
2425
708
value = getattr(options, option)
2426
709
if value is not None:
2427
710
server_settings[option] = value
2428
711
del options
2429
# Force all strings to be unicode
2430
for option in server_settings.keys():
2431
if isinstance(server_settings[option], bytes):
2432
server_settings[option] = (server_settings[option]
2433
.decode("utf-8"))
2434
# Force all boolean options to be boolean
2435
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2436
"foreground", "zeroconf"):
2437
server_settings[option] = bool(server_settings[option])
2438
# Debug implies foreground
2439
if server_settings["debug"]:
2440
server_settings["foreground"] = True
2441
712
# Now we have our good server settings in "server_settings"
2442
713
2443
##################################################################
2444
2445
if (not server_settings["zeroconf"]
2446
and not (server_settings["port"]
2447
or server_settings["socket"] != "")):
2448
parser.error("Needs port or socket to work without Zeroconf")
2449
2450
# For convenience
2451
debug = server_settings["debug"]
2452
debuglevel = server_settings["debuglevel"]
2453
use_dbus = server_settings["use_dbus"]
2454
use_ipv6 = server_settings["use_ipv6"]
2455
stored_state_path = os.path.join(server_settings["statedir"],
2456
stored_state_file)
2457
foreground = server_settings["foreground"]
2458
zeroconf = server_settings["zeroconf"]
2459
2460
if debug:
2461
initlogger(debug, logging.DEBUG)
2462
else:
2463
if not debuglevel:
2464
initlogger(debug)
2465
else:
2466
level = getattr(logging, debuglevel.upper())
2467
initlogger(debug, level)
2468
2469
if server_settings["servicename"] != "Mandos":
2470
syslogger.setFormatter(
2471
logging.Formatter('Mandos ({}) [%(process)d]:'
2472
' %(levelname)s: %(message)s'.format(
2473
server_settings["servicename"])))
2474
2475
714
# Parse config file with clients
2476
client_config = configparser.SafeConfigParser(Client
2477
.client_defaults)
715
client_defaults = { "timeout": "1h",
716
"interval": "5m",
717
"checker": "fping -q -- %%(fqdn)s",
718
}
719
client_config = ConfigParser.SafeConfigParser(client_defaults)
2478
720
client_config.read(os.path.join(server_settings["configdir"],
2479
721
"clients.conf"))
2480
722
2481
global mandos_dbus_service
2482
mandos_dbus_service = None
2483
2484
socketfd = None
2485
if server_settings["socket"] != "":
2486
socketfd = server_settings["socket"]
2487
tcp_server = MandosServer(
2488
(server_settings["address"], server_settings["port"]),
2489
ClientHandler,
2490
interface=(server_settings["interface"] or None),
2491
use_ipv6=use_ipv6,
2492
gnutls_priority=server_settings["priority"],
2493
use_dbus=use_dbus,
2494
socketfd=socketfd)
2495
if not foreground:
2496
pidfilename = "/run/mandos.pid"
2497
if not os.path.isdir("/run/."):
2498
pidfilename = "/var/run/mandos.pid"
2499
pidfile = None
2500
try:
2501
pidfile = open(pidfilename, "w")
2502
except IOError as e:
2503
logger.error("Could not open file %r", pidfilename,
2504
exc_info=e)
2505
2506
for name in ("_mandos", "mandos", "nobody"):
2507
try:
2508
uid = pwd.getpwnam(name).pw_uid
2509
gid = pwd.getpwnam(name).pw_gid
2510
break
2511
except KeyError:
2512
continue
2513
else:
2514
uid = 65534
2515
gid = 65534
2516
try:
2517
os.setgid(gid)
2518
os.setuid(uid)
2519
except OSError as error:
2520
if error.errno != errno.EPERM:
2521
raise
2522
2523
if debug:
2524
# Enable all possible GnuTLS debugging
2525
2526
# "Use a log level over 10 to enable all debugging options."
2527
# - GnuTLS manual
2528
gnutls.library.functions.gnutls_global_set_log_level(11)
2529
2530
@gnutls.library.types.gnutls_log_func
2531
def debug_gnutls(level, string):
2532
logger.debug("GnuTLS: %s", string[:-1])
2533
2534
gnutls.library.functions.gnutls_global_set_log_function(
2535
debug_gnutls)
2536
2537
# Redirect stdin so all checkers get /dev/null
2538
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2539
os.dup2(null, sys.stdin.fileno())
2540
if null > 2:
2541
os.close(null)
2542
2543
# Need to fork before connecting to D-Bus
2544
if not foreground:
2545
# Close all input and output, do double fork, etc.
2546
daemon()
2547
2548
# multiprocessing will use threads, so before we use gobject we
2549
# need to inform gobject that threads will be used.
2550
gobject.threads_init()
723
global service
724
service = AvahiService(name = server_settings["servicename"],
725
type = "_mandos._tcp", );
726
if server_settings["interface"]:
727
service.interface = if_nametoindex(server_settings["interface"])
2551
728
2552
729
global main_loop
730
global bus
731
global server
2553
732
# From the Avahi example code
2554
DBusGMainLoop(set_as_default=True)
733
DBusGMainLoop(set_as_default=True )
2555
734
main_loop = gobject.MainLoop()
2556
735
bus = dbus.SystemBus()
736
server = dbus.Interface(
737
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
738
avahi.DBUS_INTERFACE_SERVER )
2557
739
# End of Avahi example code
2558
if use_dbus:
2559
try:
2560
bus_name = dbus.service.BusName("se.recompile.Mandos",
2561
bus,
2562
do_not_queue=True)
2563
old_bus_name = dbus.service.BusName(
2564
"se.bsnet.fukt.Mandos", bus,
2565
do_not_queue=True)
2566
except dbus.exceptions.NameExistsException as e:
2567
logger.error("Disabling D-Bus:", exc_info=e)
2568
use_dbus = False
2569
server_settings["use_dbus"] = False
2570
tcp_server.use_dbus = False
2571
if zeroconf:
2572
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2573
service = AvahiServiceToSyslog(
2574
name = server_settings["servicename"],
2575
servicetype = "_mandos._tcp",
2576
protocol = protocol,
2577
bus = bus)
2578
if server_settings["interface"]:
2579
service.interface = if_nametoindex(
2580
server_settings["interface"].encode("utf-8"))
2581
2582
global multiprocessing_manager
2583
multiprocessing_manager = multiprocessing.Manager()
2584
2585
client_class = Client
2586
if use_dbus:
2587
client_class = functools.partial(ClientDBus, bus = bus)
2588
2589
client_settings = Client.config_parser(client_config)
2590
old_client_settings = {}
2591
clients_data = {}
2592
2593
# This is used to redirect stdout and stderr for checker processes
2594
global wnull
2595
wnull = open(os.devnull, "w") # A writable /dev/null
2596
# Only used if server is running in foreground but not in debug
2597
# mode
2598
if debug or not foreground:
2599
wnull.close()
2600
2601
# Get client data and settings from last running state.
2602
if server_settings["restore"]:
2603
try:
2604
with open(stored_state_path, "rb") as stored_state:
2605
clients_data, old_client_settings = pickle.load(
2606
stored_state)
2607
os.remove(stored_state_path)
2608
except IOError as e:
2609
if e.errno == errno.ENOENT:
2610
logger.warning("Could not load persistent state:"
2611
" {}".format(os.strerror(e.errno)))
2612
else:
2613
logger.critical("Could not load persistent state:",
2614
exc_info=e)
2615
raise
2616
except EOFError as e:
2617
logger.warning("Could not load persistent state: "
2618
"EOFError:",
2619
exc_info=e)
2620
2621
with PGPEngine() as pgp:
2622
for client_name, client in clients_data.items():
2623
# Skip removed clients
2624
if client_name not in client_settings:
2625
continue
2626
2627
# Decide which value to use after restoring saved state.
2628
# We have three different values: Old config file,
2629
# new config file, and saved state.
2630
# New config value takes precedence if it differs from old
2631
# config value, otherwise use saved state.
2632
for name, value in client_settings[client_name].items():
2633
try:
2634
# For each value in new config, check if it
2635
# differs from the old config value (Except for
2636
# the "secret" attribute)
2637
if (name != "secret"
2638
and (value !=
2639
old_client_settings[client_name][name])):
2640
client[name] = value
2641
except KeyError:
2642
pass
2643
2644
# Clients who has passed its expire date can still be
2645
# enabled if its last checker was successful. A Client
2646
# whose checker succeeded before we stored its state is
2647
# assumed to have successfully run all checkers during
2648
# downtime.
2649
if client["enabled"]:
2650
if datetime.datetime.utcnow() >= client["expires"]:
2651
if not client["last_checked_ok"]:
2652
logger.warning(
2653
"disabling client {} - Client never "
2654
"performed a successful checker".format(
2655
client_name))
2656
client["enabled"] = False
2657
elif client["last_checker_status"] != 0:
2658
logger.warning(
2659
"disabling client {} - Client last"
2660
" checker failed with error code"
2661
" {}".format(
2662
client_name,
2663
client["last_checker_status"]))
2664
client["enabled"] = False
2665
else:
2666
client["expires"] = (
2667
datetime.datetime.utcnow()
2668
+ client["timeout"])
2669
logger.debug("Last checker succeeded,"
2670
" keeping {} enabled".format(
2671
client_name))
2672
try:
2673
client["secret"] = pgp.decrypt(
2674
client["encrypted_secret"],
2675
client_settings[client_name]["secret"])
2676
except PGPError:
2677
# If decryption fails, we use secret from new settings
2678
logger.debug("Failed to decrypt {} old secret".format(
2679
client_name))
2680
client["secret"] = (client_settings[client_name]
2681
["secret"])
2682
2683
# Add/remove clients based on new changes made to config
2684
for client_name in (set(old_client_settings)
2685
- set(client_settings)):
2686
del clients_data[client_name]
2687
for client_name in (set(client_settings)
2688
- set(old_client_settings)):
2689
clients_data[client_name] = client_settings[client_name]
2690
2691
# Create all client objects
2692
for client_name, client in clients_data.items():
2693
tcp_server.clients[client_name] = client_class(
2694
name = client_name,
2695
settings = client,
2696
server_settings = server_settings)
2697
2698
if not tcp_server.clients:
2699
logger.warning("No clients defined")
2700
2701
if not foreground:
2702
if pidfile is not None:
2703
try:
2704
with pidfile:
2705
pid = os.getpid()
2706
pidfile.write("{}\n".format(pid).encode("utf-8"))
2707
except IOError:
2708
logger.error("Could not write to file %r with PID %d",
2709
pidfilename, pid)
2710
del pidfile
2711
del pidfilename
2712
2713
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2714
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2715
2716
if use_dbus:
2717
2718
@alternate_dbus_interfaces(
2719
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2720
class MandosDBusService(DBusObjectWithProperties):
2721
"""A D-Bus proxy object"""
2722
2723
def __init__(self):
2724
dbus.service.Object.__init__(self, bus, "/")
2725
2726
_interface = "se.recompile.Mandos"
2727
2728
@dbus_interface_annotations(_interface)
2729
def _foo(self):
2730
return {
2731
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2732
"false" }
2733
2734
@dbus.service.signal(_interface, signature="o")
2735
def ClientAdded(self, objpath):
2736
"D-Bus signal"
2737
pass
2738
2739
@dbus.service.signal(_interface, signature="ss")
2740
def ClientNotFound(self, fingerprint, address):
2741
"D-Bus signal"
2742
pass
2743
2744
@dbus.service.signal(_interface, signature="os")
2745
def ClientRemoved(self, objpath, name):
2746
"D-Bus signal"
2747
pass
2748
2749
@dbus.service.method(_interface, out_signature="ao")
2750
def GetAllClients(self):
2751
"D-Bus method"
2752
return dbus.Array(c.dbus_object_path for c in
2753
tcp_server.clients.itervalues())
2754
2755
@dbus.service.method(_interface,
2756
out_signature="a{oa{sv}}")
2757
def GetAllClientsWithProperties(self):
2758
"D-Bus method"
2759
return dbus.Dictionary(
2760
{ c.dbus_object_path: c.GetAll("")
2761
for c in tcp_server.clients.itervalues() },
2762
signature="oa{sv}")
2763
2764
@dbus.service.method(_interface, in_signature="o")
2765
def RemoveClient(self, object_path):
2766
"D-Bus method"
2767
for c in tcp_server.clients.itervalues():
2768
if c.dbus_object_path == object_path:
2769
del tcp_server.clients[c.name]
2770
c.remove_from_connection()
2771
# Don't signal anything except ClientRemoved
2772
c.disable(quiet=True)
2773
# Emit D-Bus signal
2774
self.ClientRemoved(object_path, c.name)
2775
return
2776
raise KeyError(object_path)
2777
2778
del _interface
2779
2780
mandos_dbus_service = MandosDBusService()
740
741
debug = server_settings["debug"]
742
743
if debug:
744
console = logging.StreamHandler()
745
# console.setLevel(logging.DEBUG)
746
console.setFormatter(logging.Formatter\
747
('%(levelname)s: %(message)s'))
748
logger.addHandler(console)
749
del console
750
751
clients = Set()
752
def remove_from_clients(client):
753
clients.remove(client)
754
if not clients:
755
logger.debug(u"No clients left, exiting")
756
sys.exit()
757
758
clients.update(Set(Client(name=section,
759
stop_hook = remove_from_clients,
760
**(dict(client_config\
761
.items(section))))
762
for section in client_config.sections()))
763
764
if not debug:
765
daemon(False, False)
2781
766
2782
767
def cleanup():
2783
768
"Cleanup function; run on exit"
2784
if zeroconf:
2785
service.cleanup()
2786
2787
multiprocessing.active_children()
2788
wnull.close()
2789
if not (tcp_server.clients or client_settings):
2790
return
2791
2792
# Store client before exiting. Secrets are encrypted with key
2793
# based on what config file has. If config file is
2794
# removed/edited, old secret will thus be unrecovable.
2795
clients = {}
2796
with PGPEngine() as pgp:
2797
for client in tcp_server.clients.itervalues():
2798
key = client_settings[client.name]["secret"]
2799
client.encrypted_secret = pgp.encrypt(client.secret,
2800
key)
2801
client_dict = {}
2802
2803
# A list of attributes that can not be pickled
2804
# + secret.
2805
exclude = { "bus", "changedstate", "secret",
2806
"checker", "server_settings" }
2807
for name, typ in inspect.getmembers(dbus.service
2808
.Object):
2809
exclude.add(name)
2810
2811
client_dict["encrypted_secret"] = (client
2812
.encrypted_secret)
2813
for attr in client.client_structure:
2814
if attr not in exclude:
2815
client_dict[attr] = getattr(client, attr)
2816
2817
clients[client.name] = client_dict
2818
del client_settings[client.name]["secret"]
2819
2820
try:
2821
with tempfile.NamedTemporaryFile(
2822
mode='wb',
2823
suffix=".pickle",
2824
prefix='clients-',
2825
dir=os.path.dirname(stored_state_path),
2826
delete=False) as stored_state:
2827
pickle.dump((clients, client_settings), stored_state)
2828
tempname = stored_state.name
2829
os.rename(tempname, stored_state_path)
2830
except (IOError, OSError) as e:
2831
if not debug:
2832
try:
2833
os.remove(tempname)
2834
except NameError:
2835
pass
2836
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2837
logger.warning("Could not save persistent state: {}"
2838
.format(os.strerror(e.errno)))
2839
else:
2840
logger.warning("Could not save persistent state:",
2841
exc_info=e)
2842
raise
2843
2844
# Delete all clients, and settings from config
2845
while tcp_server.clients:
2846
name, client = tcp_server.clients.popitem()
2847
if use_dbus:
2848
client.remove_from_connection()
2849
# Don't signal anything except ClientRemoved
2850
client.disable(quiet=True)
2851
if use_dbus:
2852
# Emit D-Bus signal
2853
mandos_dbus_service.ClientRemoved(
2854
client.dbus_object_path, client.name)
2855
client_settings.clear()
769
global group
770
# From the Avahi example code
771
if not group is None:
772
group.Free()
773
group = None
774
# End of Avahi example code
775
776
while clients:
777
client = clients.pop()
778
client.stop_hook = None
779
client.stop()
2856
780
2857
781
atexit.register(cleanup)
2858
782
2859
for client in tcp_server.clients.itervalues():
2860
if use_dbus:
2861
# Emit D-Bus signal
2862
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2863
# Need to initiate checking of clients
2864
if client.enabled:
2865
client.init_checker()
2866
2867
tcp_server.enable()
2868
tcp_server.server_activate()
2869
783
if not debug:
784
signal.signal(signal.SIGINT, signal.SIG_IGN)
785
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
786
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
787
788
for client in clients:
789
client.start()
790
791
tcp_server = IPv6_TCPServer((server_settings["address"],
792
server_settings["port"]),
793
tcp_handler,
794
settings=server_settings,
795
clients=clients)
2870
796
# Find out what port we got
2871
if zeroconf:
2872
service.port = tcp_server.socket.getsockname()[1]
2873
if use_ipv6:
2874
logger.info("Now listening on address %r, port %d,"
2875
" flowinfo %d, scope_id %d",
2876
*tcp_server.socket.getsockname())
2877
else: # IPv4
2878
logger.info("Now listening on address %r, port %d",
2879
*tcp_server.socket.getsockname())
797
service.port = tcp_server.socket.getsockname()[1]
798
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
799
u" scope_id %d" % tcp_server.socket.getsockname())
2880
800
2881
801
#service.interface = tcp_server.socket.getsockname()[3]
2882
802
2883
803
try:
2884
if zeroconf:
2885
# From the Avahi example code
2886
try:
2887
service.activate()
2888
except dbus.exceptions.DBusException as error:
2889
logger.critical("D-Bus Exception", exc_info=error)
2890
cleanup()
2891
sys.exit(1)
2892
# End of Avahi example code
804
# From the Avahi example code
805
server.connect_to_signal("StateChanged", server_state_changed)
806
try:
807
server_state_changed(server.GetState())
808
except dbus.exceptions.DBusException, error:
809
logger.critical(u"DBusException: %s", error)
810
sys.exit(1)
811
# End of Avahi example code
2893
812
2894
813
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2895
814
lambda *args, **kwargs:
2896
(tcp_server.handle_request
2897
(*args[2:], **kwargs) or True))
815
tcp_server.handle_request\
816
(*args[2:], **kwargs) or True)
2898
817
2899
818
logger.debug("Starting main loop")
819
main_loop_started = True
2900
820
main_loop.run()
2901
except AvahiError as error:
2902
logger.critical("Avahi Error", exc_info=error)
2903
cleanup()
821
except AvahiError, error:
822
logger.critical(u"AvahiError: %s" + unicode(error))
2904
823
sys.exit(1)
2905
824
except KeyboardInterrupt:
2906
825
if debug:
2907
print("", file=sys.stderr)
2908
logger.debug("Server received KeyboardInterrupt")
2909
logger.debug("Server exiting")
2910
# Must run before the D-Bus bus name gets deregistered
2911
cleanup()
2912
826
print
2913
827
2914
828
if __name__ == '__main__':
2915
829
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0