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- Committer: Björn Påhlsson
- Date: 2008-07-21 19:15:06 UTC
- mfrom: (19 mandos)
- mto: This revision was merged to the branch mainline in revision 22.
- Revision ID: belorn@braxen-20080721191506-f4av11wlu2cmmeid
merge
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
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: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
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# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# 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
import SocketServer as socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
31
#
32
33
from __future__ import division
34
35
import SocketServer
38
36
import socket
39
import argparse
37
import select
38
from optparse import OptionParser
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
import ConfigParser as configparser
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import hashlib
67
58
68
59
import dbus
69
import dbus.service
70
60
import gobject
71
61
import avahi
72
62
from dbus.mainloop.glib import DBusGMainLoop
73
63
import ctypes
74
import ctypes.util
75
import xml.dom.minidom
76
import inspect
77
import Crypto.Cipher.AES
78
79
try:
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
except AttributeError:
82
try:
83
from IN import SO_BINDTODEVICE
84
except ImportError:
85
SO_BINDTODEVICE = None
86
87
88
version = "1.4.1"
89
90
logger = logging.getLogger()
91
stored_state_path = "/var/lib/mandos/clients.pickle"
92
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
96
syslogger.setFormatter(logging.Formatter
97
('Mandos [%(process)d]: %(levelname)s:'
98
' %(message)s'))
64
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
75
76
77
logger = logging.Logger('mandos')
78
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
99
82
logger.addHandler(syslogger)
100
101
console = logging.StreamHandler()
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
103
' [%(process)d]:'
104
' %(levelname)s:'
105
' %(message)s'))
106
logger.addHandler(console)
107
108
109
class AvahiError(Exception):
110
def __init__(self, value, *args, **kwargs):
111
self.value = value
112
super(AvahiError, self).__init__(value, *args, **kwargs)
113
def __unicode__(self):
114
return unicode(repr(self.value))
115
116
class AvahiServiceError(AvahiError):
117
pass
118
119
class AvahiGroupError(AvahiError):
120
pass
121
122
123
class AvahiService(object):
124
"""An Avahi (Zeroconf) service.
125
126
Attributes:
127
interface: integer; avahi.IF_UNSPEC or an interface index.
128
Used to optionally bind to the specified interface.
129
name: string; Example: 'Mandos'
130
type: string; Example: '_mandos._tcp'.
131
See <http://www.dns-sd.org/ServiceTypes.html>
132
port: integer; what port to announce
133
TXT: list of strings; TXT record for the service
134
domain: string; Domain to publish on, default to .local if empty.
135
host: string; Host to publish records for, default is localhost
136
max_renames: integer; maximum number of renames
137
rename_count: integer; counter so we only rename after collisions
138
a sensible number of times
139
group: D-Bus Entry Group
140
server: D-Bus Server
141
bus: dbus.SystemBus()
142
"""
143
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
144
servicetype = None, port = None, TXT = None,
145
domain = "", host = "", max_renames = 32768,
146
protocol = avahi.PROTO_UNSPEC, bus = None):
147
self.interface = interface
148
self.name = name
149
self.type = servicetype
150
self.port = port
151
self.TXT = TXT if TXT is not None else []
152
self.domain = domain
153
self.host = host
154
self.rename_count = 0
155
self.max_renames = max_renames
156
self.protocol = protocol
157
self.group = None # our entry group
158
self.server = None
159
self.bus = bus
160
self.entry_group_state_changed_match = None
161
def rename(self):
162
"""Derived from the Avahi example code"""
163
if self.rename_count >= self.max_renames:
164
logger.critical("No suitable Zeroconf service name found"
165
" after %i retries, exiting.",
166
self.rename_count)
167
raise AvahiServiceError("Too many renames")
168
self.name = unicode(self.server
169
.GetAlternativeServiceName(self.name))
170
logger.info("Changing Zeroconf service name to %r ...",
171
self.name)
172
self.remove()
173
try:
174
self.add()
175
except dbus.exceptions.DBusException as error:
176
logger.critical("DBusException: %s", error)
177
self.cleanup()
178
os._exit(1)
179
self.rename_count += 1
180
def remove(self):
181
"""Derived from the Avahi example code"""
182
if self.entry_group_state_changed_match is not None:
183
self.entry_group_state_changed_match.remove()
184
self.entry_group_state_changed_match = None
185
if self.group is not None:
186
self.group.Reset()
187
def add(self):
188
"""Derived from the Avahi example code"""
189
self.remove()
190
if self.group is None:
191
self.group = dbus.Interface(
192
self.bus.get_object(avahi.DBUS_NAME,
193
self.server.EntryGroupNew()),
194
avahi.DBUS_INTERFACE_ENTRY_GROUP)
195
self.entry_group_state_changed_match = (
196
self.group.connect_to_signal(
197
'StateChanged', self.entry_group_state_changed))
198
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
199
self.name, self.type)
200
self.group.AddService(
201
self.interface,
202
self.protocol,
203
dbus.UInt32(0), # flags
204
self.name, self.type,
205
self.domain, self.host,
206
dbus.UInt16(self.port),
207
avahi.string_array_to_txt_array(self.TXT))
208
self.group.Commit()
209
def entry_group_state_changed(self, state, error):
210
"""Derived from the Avahi example code"""
211
logger.debug("Avahi entry group state change: %i", state)
212
213
if state == avahi.ENTRY_GROUP_ESTABLISHED:
214
logger.debug("Zeroconf service established.")
215
elif state == avahi.ENTRY_GROUP_COLLISION:
216
logger.info("Zeroconf service name collision.")
217
self.rename()
218
elif state == avahi.ENTRY_GROUP_FAILURE:
219
logger.critical("Avahi: Error in group state changed %s",
220
unicode(error))
221
raise AvahiGroupError("State changed: %s"
222
% unicode(error))
223
def cleanup(self):
224
"""Derived from the Avahi example code"""
225
if self.group is not None:
226
try:
227
self.group.Free()
228
except (dbus.exceptions.UnknownMethodException,
229
dbus.exceptions.DBusException) as e:
230
pass
231
self.group = None
232
self.remove()
233
def server_state_changed(self, state, error=None):
234
"""Derived from the Avahi example code"""
235
logger.debug("Avahi server state change: %i", state)
236
bad_states = { avahi.SERVER_INVALID:
237
"Zeroconf server invalid",
238
avahi.SERVER_REGISTERING: None,
239
avahi.SERVER_COLLISION:
240
"Zeroconf server name collision",
241
avahi.SERVER_FAILURE:
242
"Zeroconf server failure" }
243
if state in bad_states:
244
if bad_states[state] is not None:
245
if error is None:
246
logger.error(bad_states[state])
247
else:
248
logger.error(bad_states[state] + ": %r", error)
249
self.cleanup()
250
elif state == avahi.SERVER_RUNNING:
251
self.add()
252
else:
253
if error is None:
254
logger.debug("Unknown state: %r", state)
255
else:
256
logger.debug("Unknown state: %r: %r", state, error)
257
def activate(self):
258
"""Derived from the Avahi example code"""
259
if self.server is None:
260
self.server = dbus.Interface(
261
self.bus.get_object(avahi.DBUS_NAME,
262
avahi.DBUS_PATH_SERVER,
263
follow_name_owner_changes=True),
264
avahi.DBUS_INTERFACE_SERVER)
265
self.server.connect_to_signal("StateChanged",
266
self.server_state_changed)
267
self.server_state_changed(self.server.GetState())
268
269
class AvahiServiceToSyslog(AvahiService):
270
def rename(self):
271
"""Add the new name to the syslog messages"""
272
ret = AvahiService.rename(self)
273
syslogger.setFormatter(logging.Formatter
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
276
% self.name))
277
return ret
278
279
def _timedelta_to_milliseconds(td):
280
"Convert a datetime.timedelta() to milliseconds"
281
return ((td.days * 24 * 60 * 60 * 1000)
282
+ (td.seconds * 1000)
283
+ (td.microseconds // 1000))
284
83
del syslogger
84
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
89
# From the Avahi example code:
90
serviceName = "Mandos"
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
99
# End of Avahi example code
100
101
285
102
class Client(object):
286
103
"""A representation of a client host served by this server.
287
288
104
Attributes:
289
_approved: bool(); 'None' if not yet approved/disapproved
290
approval_delay: datetime.timedelta(); Time to wait for approval
291
approval_duration: datetime.timedelta(); Duration of one approval
292
checker: subprocess.Popen(); a running checker process used
293
to see if the client lives.
294
'None' if no process is running.
295
checker_callback_tag: a gobject event source tag, or None
296
checker_command: string; External command which is run to check
297
if client lives. %() expansions are done at
105
name: string; from the config file, used in log messages
106
fingerprint: string (40 or 32 hexadecimal digits); used to
107
uniquely identify the client
108
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
114
interval: datetime.timedelta(); How often to start a new checker
115
stop_hook: If set, called by stop() as stop_hook(self)
116
checker: subprocess.Popen(); a running checker process used
117
to see if the client lives.
118
Is None if no process is running.
119
checker_initiator_tag: a gobject event source tag, or None
120
stop_initiator_tag: - '' -
121
checker_callback_tag: - '' -
122
checker_command: string; External command which is run to check if
123
client lives. %()s expansions are done at
298
124
runtime with vars(self) as dict, so that for
299
125
instance %(name)s can be used in the command.
300
checker_initiator_tag: a gobject event source tag, or None
301
created: datetime.datetime(); (UTC) object creation
302
client_structure: Object describing what attributes a client has
303
and is used for storing the client at exit
304
current_checker_command: string; current running checker_command
305
disable_initiator_tag: a gobject event source tag, or None
306
enabled: bool()
307
fingerprint: string (40 or 32 hexadecimal digits); used to
308
uniquely identify the client
309
host: string; available for use by the checker command
310
interval: datetime.timedelta(); How often to start a new checker
311
last_approval_request: datetime.datetime(); (UTC) or None
312
last_checked_ok: datetime.datetime(); (UTC) or None
313
last_checker_status: integer between 0 and 255 reflecting exit status
314
of last checker. -1 reflect crashed checker,
315
or None.
316
last_enabled: datetime.datetime(); (UTC)
317
name: string; from the config file, used in log messages and
318
D-Bus identifiers
319
secret: bytestring; sent verbatim (over TLS) to client
320
timeout: datetime.timedelta(); How long from last_checked_ok
321
until this client is disabled
322
extended_timeout: extra long timeout when password has been sent
323
runtime_expansions: Allowed attributes for runtime expansion.
324
expires: datetime.datetime(); time (UTC) when a client will be
325
disabled, or None
126
Private attibutes:
127
_timeout: Real variable for 'timeout'
128
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
130
_interval_milliseconds: - '' -
326
131
"""
327
328
runtime_expansions = ("approval_delay", "approval_duration",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
331
"last_enabled", "name", "timeout")
332
333
def timeout_milliseconds(self):
334
"Return the 'timeout' attribute in milliseconds"
335
return _timedelta_to_milliseconds(self.timeout)
336
337
def extended_timeout_milliseconds(self):
338
"Return the 'extended_timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.extended_timeout)
340
341
def interval_milliseconds(self):
342
"Return the 'interval' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.interval)
344
345
def approval_delay_milliseconds(self):
346
return _timedelta_to_milliseconds(self.approval_delay)
347
348
def __init__(self, name = None, config=None):
349
"""Note: the 'checker' key in 'config' sets the
350
'checker_command' attribute and *not* the 'checker'
351
attribute."""
132
def _set_timeout(self, timeout):
133
"Setter function for 'timeout' attribute"
134
self._timeout = timeout
135
self._timeout_milliseconds = ((self.timeout.days
136
* 24 * 60 * 60 * 1000)
137
+ (self.timeout.seconds * 1000)
138
+ (self.timeout.microseconds
139
// 1000))
140
timeout = property(lambda self: self._timeout,
141
_set_timeout)
142
del _set_timeout
143
def _set_interval(self, interval):
144
"Setter function for 'interval' attribute"
145
self._interval = interval
146
self._interval_milliseconds = ((self.interval.days
147
* 24 * 60 * 60 * 1000)
148
+ (self.interval.seconds
149
* 1000)
150
+ (self.interval.microseconds
151
// 1000))
152
interval = property(lambda self: self._interval,
153
_set_interval)
154
del _set_interval
155
def __init__(self, name=None, options=None, stop_hook=None,
156
fingerprint=None, secret=None, secfile=None,
157
fqdn=None, timeout=None, interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
352
160
self.name = name
353
if config is None:
354
config = {}
355
logger.debug("Creating client %r", self.name)
356
# Uppercase and remove spaces from fingerprint for later
357
# comparison purposes with return value from the fingerprint()
358
# function
359
self.fingerprint = (config["fingerprint"].upper()
360
.replace(" ", ""))
361
logger.debug(" Fingerprint: %s", self.fingerprint)
362
if "secret" in config:
363
self.secret = config["secret"].decode("base64")
364
elif "secfile" in config:
365
with open(os.path.expanduser(os.path.expandvars
366
(config["secfile"])),
367
"rb") as secfile:
368
self.secret = secfile.read()
369
else:
370
raise TypeError("No secret or secfile for client %s"
371
% self.name)
372
self.host = config.get("host", "")
373
self.created = datetime.datetime.utcnow()
374
self.enabled = True
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
377
self.last_checked_ok = None
378
self.last_checker_status = None
379
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
382
self.interval = string_to_delta(config["interval"])
161
# Uppercase and remove spaces from fingerprint
162
# for later comparison purposes with return value of
163
# the fingerprint() function
164
self.fingerprint = fingerprint.upper().replace(u" ", u"")
165
if secret:
166
self.secret = secret.decode(u"base64")
167
elif secfile:
168
sf = open(secfile)
169
self.secret = sf.read()
170
sf.close()
171
else:
172
raise RuntimeError(u"No secret or secfile for client %s"
173
% self.name)
174
self.fqdn = fqdn # string
175
self.created = datetime.datetime.now()
176
self.last_seen = None
177
if timeout is None:
178
self.timeout = options.timeout
179
else:
180
self.timeout = string_to_delta(timeout)
181
if interval == -1:
182
self.interval = options.interval
183
else:
184
self.interval = string_to_delta(interval)
185
self.stop_hook = stop_hook
383
186
self.checker = None
384
187
self.checker_initiator_tag = None
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
188
self.stop_initiator_tag = None
387
189
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
389
self.current_checker_command = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
392
True)
393
self.approvals_pending = 0
394
self.approval_delay = string_to_delta(
395
config["approval_delay"])
396
self.approval_duration = string_to_delta(
397
config["approval_duration"])
398
self.changedstate = (multiprocessing_manager
399
.Condition(multiprocessing_manager
400
.Lock()))
401
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
402
self.client_structure.append("client_structure")
403
404
405
for name, t in inspect.getmembers(type(self),
406
lambda obj: isinstance(obj, property)):
407
if not name.startswith("_"):
408
self.client_structure.append(name)
409
410
# Send notice to process children that client state has changed
411
def send_changedstate(self):
412
with self.changedstate:
413
self.changedstate.notify_all()
414
415
def enable(self):
190
self.check_command = checker
191
def start(self):
416
192
"""Start this client's checker and timeout hooks"""
417
if getattr(self, "enabled", False):
418
# Already enabled
419
return
420
self.send_changedstate()
421
self.expires = datetime.datetime.utcnow() + self.timeout
422
self.enabled = True
423
self.last_enabled = datetime.datetime.utcnow()
424
self.init_checker()
425
426
def disable(self, quiet=True):
427
"""Disable this client."""
428
if not getattr(self, "enabled", False):
193
# Schedule a new checker to be started an 'interval' from now,
194
# and every interval from then on.
195
self.checker_initiator_tag = gobject.timeout_add\
196
(self._interval_milliseconds,
197
self.start_checker)
198
# Also start a new checker *right now*.
199
self.start_checker()
200
# Schedule a stop() when 'timeout' has passed
201
self.stop_initiator_tag = gobject.timeout_add\
202
(self._timeout_milliseconds,
203
self.stop)
204
def stop(self):
205
"""Stop this client.
206
The possibility that this client might be restarted is left
207
open, but not currently used."""
208
# If this client doesn't have a secret, it is already stopped.
209
if self.secret:
210
logger.debug(u"Stopping client %s", self.name)
211
self.secret = None
212
else:
429
213
return False
430
if not quiet:
431
self.send_changedstate()
432
if not quiet:
433
logger.info("Disabling client %s", self.name)
434
if getattr(self, "disable_initiator_tag", False):
435
gobject.source_remove(self.disable_initiator_tag)
436
self.disable_initiator_tag = None
437
self.expires = None
438
if getattr(self, "checker_initiator_tag", False):
214
if hasattr(self, "stop_initiator_tag") \
215
and self.stop_initiator_tag:
216
gobject.source_remove(self.stop_initiator_tag)
217
self.stop_initiator_tag = None
218
if hasattr(self, "checker_initiator_tag") \
219
and self.checker_initiator_tag:
439
220
gobject.source_remove(self.checker_initiator_tag)
440
221
self.checker_initiator_tag = None
441
222
self.stop_checker()
442
self.enabled = False
223
if self.stop_hook:
224
self.stop_hook(self)
443
225
# Do not run this again if called by a gobject.timeout_add
444
226
return False
445
446
227
def __del__(self):
447
self.disable()
448
449
def init_checker(self):
450
# Schedule a new checker to be started an 'interval' from now,
451
# and every interval from then on.
452
self.checker_initiator_tag = (gobject.timeout_add
453
(self.interval_milliseconds(),
454
self.start_checker))
455
# Schedule a disable() when 'timeout' has passed
456
self.disable_initiator_tag = (gobject.timeout_add
457
(self.timeout_milliseconds(),
458
self.disable))
459
# Also start a new checker *right now*.
460
self.start_checker()
461
462
463
def checker_callback(self, pid, condition, command):
228
self.stop_hook = None
229
self.stop()
230
def checker_callback(self, pid, condition):
464
231
"""The checker has completed, so take appropriate actions."""
232
now = datetime.datetime.now()
465
233
self.checker_callback_tag = None
466
234
self.checker = None
467
if os.WIFEXITED(condition):
468
self.last_checker_status = os.WEXITSTATUS(condition)
469
if self.last_checker_status == 0:
470
logger.info("Checker for %(name)s succeeded",
471
vars(self))
472
self.checked_ok()
473
else:
474
logger.info("Checker for %(name)s failed",
475
vars(self))
476
else:
477
self.last_checker_status = -1
478
logger.warning("Checker for %(name)s crashed?",
235
if os.WIFEXITED(condition) \
236
and (os.WEXITSTATUS(condition) == 0):
237
logger.debug(u"Checker for %(name)s succeeded",
238
vars(self))
239
self.last_seen = now
240
gobject.source_remove(self.stop_initiator_tag)
241
self.stop_initiator_tag = gobject.timeout_add\
242
(self._timeout_milliseconds,
243
self.stop)
244
elif not os.WIFEXITED(condition):
245
logger.warning(u"Checker for %(name)s crashed?",
479
246
vars(self))
480
481
def checked_ok(self, timeout=None):
482
"""Bump up the timeout for this client.
483
484
This should only be called when the client has been seen,
485
alive and well.
486
"""
487
if timeout is None:
488
timeout = self.timeout
489
self.last_checked_ok = datetime.datetime.utcnow()
490
if self.disable_initiator_tag is not None:
491
gobject.source_remove(self.disable_initiator_tag)
492
if getattr(self, "enabled", False):
493
self.disable_initiator_tag = (gobject.timeout_add
494
(_timedelta_to_milliseconds
495
(timeout), self.disable))
496
self.expires = datetime.datetime.utcnow() + timeout
497
498
def need_approval(self):
499
self.last_approval_request = datetime.datetime.utcnow()
500
247
else:
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
501
250
def start_checker(self):
502
251
"""Start a new checker subprocess if one is not running.
503
504
252
If a checker already exists, leave it running and do
505
253
nothing."""
506
254
# The reason for not killing a running checker is that if we
509
257
# client would inevitably timeout, since no checker would get
510
258
# a chance to run to completion. If we instead leave running
511
259
# checkers alone, the checker would have to take more time
512
# than 'timeout' for the client to be disabled, which is as it
513
# should be.
514
515
# If a checker exists, make sure it is not a zombie
516
try:
517
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
518
except (AttributeError, OSError) as error:
519
if (isinstance(error, OSError)
520
and error.errno != errno.ECHILD):
521
raise error
522
else:
523
if pid:
524
logger.warning("Checker was a zombie")
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status,
527
self.current_checker_command)
528
# Start a new checker if needed
260
# than 'timeout' for the client to be declared invalid, which
261
# is as it should be.
529
262
if self.checker is None:
530
263
try:
531
# In case checker_command has exactly one % operator
532
command = self.checker_command % self.host
264
command = self.check_command % self.fqdn
533
265
except TypeError:
534
# Escape attributes for the shell
535
escaped_attrs = dict(
536
(attr,
537
re.escape(unicode(str(getattr(self, attr, "")),
538
errors=
539
'replace')))
540
for attr in
541
self.runtime_expansions)
542
266
escaped_attrs = dict((key, re.escape(str(val)))
267
for key, val in
268
vars(self).iteritems())
543
269
try:
544
command = self.checker_command % escaped_attrs
545
except TypeError as error:
546
logger.error('Could not format string "%s":'
547
' %s', self.checker_command, error)
270
command = self.check_command % escaped_attrs
271
except TypeError, error:
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
548
274
return True # Try again later
549
self.current_checker_command = command
550
275
try:
551
logger.info("Starting checker %r for %s",
552
command, self.name)
553
# We don't need to redirect stdout and stderr, since
554
# in normal mode, that is already done by daemon(),
555
# and in debug mode we don't want to. (Stdin is
556
# always replaced by /dev/null.)
557
self.checker = subprocess.Popen(command,
558
close_fds=True,
559
shell=True, cwd="/")
560
self.checker_callback_tag = (gobject.child_watch_add
561
(self.checker.pid,
562
self.checker_callback,
563
data=command))
564
# The checker may have completed before the gobject
565
# watch was added. Check for this.
566
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
567
if pid:
568
gobject.source_remove(self.checker_callback_tag)
569
self.checker_callback(pid, status, command)
570
except OSError as error:
571
logger.error("Failed to start subprocess: %s",
276
logger.debug(u"Starting checker %r for %s",
277
command, self.name)
278
self.checker = subprocess.\
279
Popen(command,
280
close_fds=True, shell=True,
281
cwd="/")
282
self.checker_callback_tag = gobject.child_watch_add\
283
(self.checker.pid,
284
self.checker_callback)
285
except subprocess.OSError, error:
286
logger.error(u"Failed to start subprocess: %s",
572
287
error)
573
288
# Re-run this periodically if run by gobject.timeout_add
574
289
return True
575
576
290
def stop_checker(self):
577
291
"""Force the checker process, if any, to stop."""
578
292
if self.checker_callback_tag:
579
293
gobject.source_remove(self.checker_callback_tag)
580
294
self.checker_callback_tag = None
581
if getattr(self, "checker", None) is None:
295
if not hasattr(self, "checker") or self.checker is None:
582
296
return
583
297
logger.debug("Stopping checker for %(name)s", vars(self))
584
298
try:
585
299
os.kill(self.checker.pid, signal.SIGTERM)
586
#time.sleep(0.5)
300
#os.sleep(0.5)
587
301
#if self.checker.poll() is None:
588
302
# os.kill(self.checker.pid, signal.SIGKILL)
589
except OSError as error:
590
if error.errno != errno.ESRCH: # No such process
303
except OSError, error:
304
if error.errno != errno.ESRCH:
591
305
raise
592
306
self.checker = None
593
594
# Encrypts a client secret and stores it in a varible encrypted_secret
595
def encrypt_secret(self, key):
596
# Encryption-key need to be of a specific size, so we hash inputed key
597
hasheng = hashlib.sha256()
598
hasheng.update(key)
599
encryptionkey = hasheng.digest()
600
601
# Create validation hash so we know at decryption if it was sucessful
602
hasheng = hashlib.sha256()
603
hasheng.update(self.secret)
604
validationhash = hasheng.digest()
605
606
# Encrypt secret
607
iv = os.urandom(Crypto.Cipher.AES.block_size)
608
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
609
Crypto.Cipher.AES.MODE_CFB, iv)
610
ciphertext = ciphereng.encrypt(validationhash+self.secret)
611
self.encrypted_secret = (ciphertext, iv)
612
613
# Decrypt a encrypted client secret
614
def decrypt_secret(self, key):
615
# Decryption-key need to be of a specific size, so we hash inputed key
616
hasheng = hashlib.sha256()
617
hasheng.update(key)
618
encryptionkey = hasheng.digest()
619
620
# Decrypt encrypted secret
621
ciphertext, iv = self.encrypted_secret
622
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
623
Crypto.Cipher.AES.MODE_CFB, iv)
624
plain = ciphereng.decrypt(ciphertext)
625
626
# Validate decrypted secret to know if it was succesful
627
hasheng = hashlib.sha256()
628
validationhash = plain[:hasheng.digest_size]
629
secret = plain[hasheng.digest_size:]
630
hasheng.update(secret)
631
632
# if validation fails, we use key as new secret. Otherwhise, we use
633
# the decrypted secret
634
if hasheng.digest() == validationhash:
635
self.secret = secret
636
else:
637
self.secret = key
638
del self.encrypted_secret
639
640
641
def dbus_service_property(dbus_interface, signature="v",
642
access="readwrite", byte_arrays=False):
643
"""Decorators for marking methods of a DBusObjectWithProperties to
644
become properties on the D-Bus.
645
646
The decorated method will be called with no arguments by "Get"
647
and with one argument by "Set".
648
649
The parameters, where they are supported, are the same as
650
dbus.service.method, except there is only "signature", since the
651
type from Get() and the type sent to Set() is the same.
652
"""
653
# Encoding deeply encoded byte arrays is not supported yet by the
654
# "Set" method, so we fail early here:
655
if byte_arrays and signature != "ay":
656
raise ValueError("Byte arrays not supported for non-'ay'"
657
" signature %r" % signature)
658
def decorator(func):
659
func._dbus_is_property = True
660
func._dbus_interface = dbus_interface
661
func._dbus_signature = signature
662
func._dbus_access = access
663
func._dbus_name = func.__name__
664
if func._dbus_name.endswith("_dbus_property"):
665
func._dbus_name = func._dbus_name[:-14]
666
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
667
return func
668
return decorator
669
670
671
class DBusPropertyException(dbus.exceptions.DBusException):
672
"""A base class for D-Bus property-related exceptions
673
"""
674
def __unicode__(self):
675
return unicode(str(self))
676
677
678
class DBusPropertyAccessException(DBusPropertyException):
679
"""A property's access permissions disallows an operation.
680
"""
681
pass
682
683
684
class DBusPropertyNotFound(DBusPropertyException):
685
"""An attempt was made to access a non-existing property.
686
"""
687
pass
688
689
690
class DBusObjectWithProperties(dbus.service.Object):
691
"""A D-Bus object with properties.
692
693
Classes inheriting from this can use the dbus_service_property
694
decorator to expose methods as D-Bus properties. It exposes the
695
standard Get(), Set(), and GetAll() methods on the D-Bus.
696
"""
697
698
@staticmethod
699
def _is_dbus_property(obj):
700
return getattr(obj, "_dbus_is_property", False)
701
702
def _get_all_dbus_properties(self):
703
"""Returns a generator of (name, attribute) pairs
704
"""
705
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
706
for cls in self.__class__.__mro__
707
for name, prop in
708
inspect.getmembers(cls, self._is_dbus_property))
709
710
def _get_dbus_property(self, interface_name, property_name):
711
"""Returns a bound method if one exists which is a D-Bus
712
property with the specified name and interface.
713
"""
714
for cls in self.__class__.__mro__:
715
for name, value in (inspect.getmembers
716
(cls, self._is_dbus_property)):
717
if (value._dbus_name == property_name
718
and value._dbus_interface == interface_name):
719
return value.__get__(self)
720
721
# No such property
722
raise DBusPropertyNotFound(self.dbus_object_path + ":"
723
+ interface_name + "."
724
+ property_name)
725
726
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
727
out_signature="v")
728
def Get(self, interface_name, property_name):
729
"""Standard D-Bus property Get() method, see D-Bus standard.
730
"""
731
prop = self._get_dbus_property(interface_name, property_name)
732
if prop._dbus_access == "write":
733
raise DBusPropertyAccessException(property_name)
734
value = prop()
735
if not hasattr(value, "variant_level"):
736
return value
737
return type(value)(value, variant_level=value.variant_level+1)
738
739
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
740
def Set(self, interface_name, property_name, value):
741
"""Standard D-Bus property Set() method, see D-Bus standard.
742
"""
743
prop = self._get_dbus_property(interface_name, property_name)
744
if prop._dbus_access == "read":
745
raise DBusPropertyAccessException(property_name)
746
if prop._dbus_get_args_options["byte_arrays"]:
747
# The byte_arrays option is not supported yet on
748
# signatures other than "ay".
749
if prop._dbus_signature != "ay":
750
raise ValueError
751
value = dbus.ByteArray(''.join(unichr(byte)
752
for byte in value))
753
prop(value)
754
755
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
756
out_signature="a{sv}")
757
def GetAll(self, interface_name):
758
"""Standard D-Bus property GetAll() method, see D-Bus
759
standard.
760
761
Note: Will not include properties with access="write".
762
"""
763
all = {}
764
for name, prop in self._get_all_dbus_properties():
765
if (interface_name
766
and interface_name != prop._dbus_interface):
767
# Interface non-empty but did not match
768
continue
769
# Ignore write-only properties
770
if prop._dbus_access == "write":
771
continue
772
value = prop()
773
if not hasattr(value, "variant_level"):
774
all[name] = value
775
continue
776
all[name] = type(value)(value, variant_level=
777
value.variant_level+1)
778
return dbus.Dictionary(all, signature="sv")
779
780
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
781
out_signature="s",
782
path_keyword='object_path',
783
connection_keyword='connection')
784
def Introspect(self, object_path, connection):
785
"""Standard D-Bus method, overloaded to insert property tags.
786
"""
787
xmlstring = dbus.service.Object.Introspect(self, object_path,
788
connection)
789
try:
790
document = xml.dom.minidom.parseString(xmlstring)
791
def make_tag(document, name, prop):
792
e = document.createElement("property")
793
e.setAttribute("name", name)
794
e.setAttribute("type", prop._dbus_signature)
795
e.setAttribute("access", prop._dbus_access)
796
return e
797
for if_tag in document.getElementsByTagName("interface"):
798
for tag in (make_tag(document, name, prop)
799
for name, prop
800
in self._get_all_dbus_properties()
801
if prop._dbus_interface
802
== if_tag.getAttribute("name")):
803
if_tag.appendChild(tag)
804
# Add the names to the return values for the
805
# "org.freedesktop.DBus.Properties" methods
806
if (if_tag.getAttribute("name")
807
== "org.freedesktop.DBus.Properties"):
808
for cn in if_tag.getElementsByTagName("method"):
809
if cn.getAttribute("name") == "Get":
810
for arg in cn.getElementsByTagName("arg"):
811
if (arg.getAttribute("direction")
812
== "out"):
813
arg.setAttribute("name", "value")
814
elif cn.getAttribute("name") == "GetAll":
815
for arg in cn.getElementsByTagName("arg"):
816
if (arg.getAttribute("direction")
817
== "out"):
818
arg.setAttribute("name", "props")
819
xmlstring = document.toxml("utf-8")
820
document.unlink()
821
except (AttributeError, xml.dom.DOMException,
822
xml.parsers.expat.ExpatError) as error:
823
logger.error("Failed to override Introspection method",
824
error)
825
return xmlstring
826
827
828
def datetime_to_dbus (dt, variant_level=0):
829
"""Convert a UTC datetime.datetime() to a D-Bus type."""
830
if dt is None:
831
return dbus.String("", variant_level = variant_level)
832
return dbus.String(dt.isoformat(),
833
variant_level=variant_level)
834
835
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
836
.__metaclass__):
837
"""Applied to an empty subclass of a D-Bus object, this metaclass
838
will add additional D-Bus attributes matching a certain pattern.
839
"""
840
def __new__(mcs, name, bases, attr):
841
# Go through all the base classes which could have D-Bus
842
# methods, signals, or properties in them
843
for base in (b for b in bases
844
if issubclass(b, dbus.service.Object)):
845
# Go though all attributes of the base class
846
for attrname, attribute in inspect.getmembers(base):
847
# Ignore non-D-Bus attributes, and D-Bus attributes
848
# with the wrong interface name
849
if (not hasattr(attribute, "_dbus_interface")
850
or not attribute._dbus_interface
851
.startswith("se.recompile.Mandos")):
852
continue
853
# Create an alternate D-Bus interface name based on
854
# the current name
855
alt_interface = (attribute._dbus_interface
856
.replace("se.recompile.Mandos",
857
"se.bsnet.fukt.Mandos"))
858
# Is this a D-Bus signal?
859
if getattr(attribute, "_dbus_is_signal", False):
860
# Extract the original non-method function by
861
# black magic
862
nonmethod_func = (dict(
863
zip(attribute.func_code.co_freevars,
864
attribute.__closure__))["func"]
865
.cell_contents)
866
# Create a new, but exactly alike, function
867
# object, and decorate it to be a new D-Bus signal
868
# with the alternate D-Bus interface name
869
new_function = (dbus.service.signal
870
(alt_interface,
871
attribute._dbus_signature)
872
(types.FunctionType(
873
nonmethod_func.func_code,
874
nonmethod_func.func_globals,
875
nonmethod_func.func_name,
876
nonmethod_func.func_defaults,
877
nonmethod_func.func_closure)))
878
# Define a creator of a function to call both the
879
# old and new functions, so both the old and new
880
# signals gets sent when the function is called
881
def fixscope(func1, func2):
882
"""This function is a scope container to pass
883
func1 and func2 to the "call_both" function
884
outside of its arguments"""
885
def call_both(*args, **kwargs):
886
"""This function will emit two D-Bus
887
signals by calling func1 and func2"""
888
func1(*args, **kwargs)
889
func2(*args, **kwargs)
890
return call_both
891
# Create the "call_both" function and add it to
892
# the class
893
attr[attrname] = fixscope(attribute,
894
new_function)
895
# Is this a D-Bus method?
896
elif getattr(attribute, "_dbus_is_method", False):
897
# Create a new, but exactly alike, function
898
# object. Decorate it to be a new D-Bus method
899
# with the alternate D-Bus interface name. Add it
900
# to the class.
901
attr[attrname] = (dbus.service.method
902
(alt_interface,
903
attribute._dbus_in_signature,
904
attribute._dbus_out_signature)
905
(types.FunctionType
906
(attribute.func_code,
907
attribute.func_globals,
908
attribute.func_name,
909
attribute.func_defaults,
910
attribute.func_closure)))
911
# Is this a D-Bus property?
912
elif getattr(attribute, "_dbus_is_property", False):
913
# Create a new, but exactly alike, function
914
# object, and decorate it to be a new D-Bus
915
# property with the alternate D-Bus interface
916
# name. Add it to the class.
917
attr[attrname] = (dbus_service_property
918
(alt_interface,
919
attribute._dbus_signature,
920
attribute._dbus_access,
921
attribute
922
._dbus_get_args_options
923
["byte_arrays"])
924
(types.FunctionType
925
(attribute.func_code,
926
attribute.func_globals,
927
attribute.func_name,
928
attribute.func_defaults,
929
attribute.func_closure)))
930
return type.__new__(mcs, name, bases, attr)
931
932
class ClientDBus(Client, DBusObjectWithProperties):
933
"""A Client class using D-Bus
934
935
Attributes:
936
dbus_object_path: dbus.ObjectPath
937
bus: dbus.SystemBus()
938
"""
939
940
runtime_expansions = (Client.runtime_expansions
941
+ ("dbus_object_path",))
942
943
# dbus.service.Object doesn't use super(), so we can't either.
944
945
def __init__(self, bus = None, *args, **kwargs):
946
self.bus = bus
947
Client.__init__(self, *args, **kwargs)
948
949
self._approvals_pending = 0
950
# Only now, when this client is initialized, can it show up on
951
# the D-Bus
952
client_object_name = unicode(self.name).translate(
953
{ord("."): ord("_"),
954
ord("-"): ord("_")})
955
self.dbus_object_path = (dbus.ObjectPath
956
("/clients/" + client_object_name))
957
DBusObjectWithProperties.__init__(self, self.bus,
958
self.dbus_object_path)
959
960
def notifychangeproperty(transform_func,
961
dbus_name, type_func=lambda x: x,
962
variant_level=1):
963
""" Modify a variable so that it's a property which announces
964
its changes to DBus.
965
966
transform_fun: Function that takes a value and a variant_level
967
and transforms it to a D-Bus type.
968
dbus_name: D-Bus name of the variable
969
type_func: Function that transform the value before sending it
970
to the D-Bus. Default: no transform
971
variant_level: D-Bus variant level. Default: 1
972
"""
973
attrname = "_{0}".format(dbus_name)
974
def setter(self, value):
975
if hasattr(self, "dbus_object_path"):
976
if (not hasattr(self, attrname) or
977
type_func(getattr(self, attrname, None))
978
!= type_func(value)):
979
dbus_value = transform_func(type_func(value),
980
variant_level
981
=variant_level)
982
self.PropertyChanged(dbus.String(dbus_name),
983
dbus_value)
984
setattr(self, attrname, value)
985
986
return property(lambda self: getattr(self, attrname), setter)
987
988
989
expires = notifychangeproperty(datetime_to_dbus, "Expires")
990
approvals_pending = notifychangeproperty(dbus.Boolean,
991
"ApprovalPending",
992
type_func = bool)
993
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
994
last_enabled = notifychangeproperty(datetime_to_dbus,
995
"LastEnabled")
996
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
997
type_func = lambda checker:
998
checker is not None)
999
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1000
"LastCheckedOK")
1001
last_approval_request = notifychangeproperty(
1002
datetime_to_dbus, "LastApprovalRequest")
1003
approved_by_default = notifychangeproperty(dbus.Boolean,
1004
"ApprovedByDefault")
1005
approval_delay = notifychangeproperty(dbus.UInt16,
1006
"ApprovalDelay",
1007
type_func =
1008
_timedelta_to_milliseconds)
1009
approval_duration = notifychangeproperty(
1010
dbus.UInt16, "ApprovalDuration",
1011
type_func = _timedelta_to_milliseconds)
1012
host = notifychangeproperty(dbus.String, "Host")
1013
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1014
type_func =
1015
_timedelta_to_milliseconds)
1016
extended_timeout = notifychangeproperty(
1017
dbus.UInt16, "ExtendedTimeout",
1018
type_func = _timedelta_to_milliseconds)
1019
interval = notifychangeproperty(dbus.UInt16,
1020
"Interval",
1021
type_func =
1022
_timedelta_to_milliseconds)
1023
checker_command = notifychangeproperty(dbus.String, "Checker")
1024
1025
del notifychangeproperty
1026
1027
def __del__(self, *args, **kwargs):
1028
try:
1029
self.remove_from_connection()
1030
except LookupError:
1031
pass
1032
if hasattr(DBusObjectWithProperties, "__del__"):
1033
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1034
Client.__del__(self, *args, **kwargs)
1035
1036
def checker_callback(self, pid, condition, command,
1037
*args, **kwargs):
1038
self.checker_callback_tag = None
1039
self.checker = None
1040
if os.WIFEXITED(condition):
1041
exitstatus = os.WEXITSTATUS(condition)
1042
# Emit D-Bus signal
1043
self.CheckerCompleted(dbus.Int16(exitstatus),
1044
dbus.Int64(condition),
1045
dbus.String(command))
1046
else:
1047
# Emit D-Bus signal
1048
self.CheckerCompleted(dbus.Int16(-1),
1049
dbus.Int64(condition),
1050
dbus.String(command))
1051
1052
return Client.checker_callback(self, pid, condition, command,
1053
*args, **kwargs)
1054
1055
def start_checker(self, *args, **kwargs):
1056
old_checker = self.checker
1057
if self.checker is not None:
1058
old_checker_pid = self.checker.pid
1059
else:
1060
old_checker_pid = None
1061
r = Client.start_checker(self, *args, **kwargs)
1062
# Only if new checker process was started
1063
if (self.checker is not None
1064
and old_checker_pid != self.checker.pid):
1065
# Emit D-Bus signal
1066
self.CheckerStarted(self.current_checker_command)
1067
return r
1068
1069
def _reset_approved(self):
1070
self._approved = None
1071
return False
1072
1073
def approve(self, value=True):
1074
self.send_changedstate()
1075
self._approved = value
1076
gobject.timeout_add(_timedelta_to_milliseconds
1077
(self.approval_duration),
1078
self._reset_approved)
1079
1080
1081
## D-Bus methods, signals & properties
1082
_interface = "se.recompile.Mandos.Client"
1083
1084
## Signals
1085
1086
# CheckerCompleted - signal
1087
@dbus.service.signal(_interface, signature="nxs")
1088
def CheckerCompleted(self, exitcode, waitstatus, command):
1089
"D-Bus signal"
1090
pass
1091
1092
# CheckerStarted - signal
1093
@dbus.service.signal(_interface, signature="s")
1094
def CheckerStarted(self, command):
1095
"D-Bus signal"
1096
pass
1097
1098
# PropertyChanged - signal
1099
@dbus.service.signal(_interface, signature="sv")
1100
def PropertyChanged(self, property, value):
1101
"D-Bus signal"
1102
pass
1103
1104
# GotSecret - signal
1105
@dbus.service.signal(_interface)
1106
def GotSecret(self):
1107
"""D-Bus signal
1108
Is sent after a successful transfer of secret from the Mandos
1109
server to mandos-client
1110
"""
1111
pass
1112
1113
# Rejected - signal
1114
@dbus.service.signal(_interface, signature="s")
1115
def Rejected(self, reason):
1116
"D-Bus signal"
1117
pass
1118
1119
# NeedApproval - signal
1120
@dbus.service.signal(_interface, signature="tb")
1121
def NeedApproval(self, timeout, default):
1122
"D-Bus signal"
1123
return self.need_approval()
1124
1125
# NeRwequest - signal
1126
@dbus.service.signal(_interface, signature="s")
1127
def NewRequest(self, ip):
1128
"""D-Bus signal
1129
Is sent after a client request a password.
1130
"""
1131
pass
1132
1133
## Methods
1134
1135
# Approve - method
1136
@dbus.service.method(_interface, in_signature="b")
1137
def Approve(self, value):
1138
self.approve(value)
1139
1140
# CheckedOK - method
1141
@dbus.service.method(_interface)
1142
def CheckedOK(self):
1143
self.checked_ok()
1144
1145
# Enable - method
1146
@dbus.service.method(_interface)
1147
def Enable(self):
1148
"D-Bus method"
1149
self.enable()
1150
1151
# StartChecker - method
1152
@dbus.service.method(_interface)
1153
def StartChecker(self):
1154
"D-Bus method"
1155
self.start_checker()
1156
1157
# Disable - method
1158
@dbus.service.method(_interface)
1159
def Disable(self):
1160
"D-Bus method"
1161
self.disable()
1162
1163
# StopChecker - method
1164
@dbus.service.method(_interface)
1165
def StopChecker(self):
1166
self.stop_checker()
1167
1168
## Properties
1169
1170
# ApprovalPending - property
1171
@dbus_service_property(_interface, signature="b", access="read")
1172
def ApprovalPending_dbus_property(self):
1173
return dbus.Boolean(bool(self.approvals_pending))
1174
1175
# ApprovedByDefault - property
1176
@dbus_service_property(_interface, signature="b",
1177
access="readwrite")
1178
def ApprovedByDefault_dbus_property(self, value=None):
1179
if value is None: # get
1180
return dbus.Boolean(self.approved_by_default)
1181
self.approved_by_default = bool(value)
1182
1183
# ApprovalDelay - property
1184
@dbus_service_property(_interface, signature="t",
1185
access="readwrite")
1186
def ApprovalDelay_dbus_property(self, value=None):
1187
if value is None: # get
1188
return dbus.UInt64(self.approval_delay_milliseconds())
1189
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1190
1191
# ApprovalDuration - property
1192
@dbus_service_property(_interface, signature="t",
1193
access="readwrite")
1194
def ApprovalDuration_dbus_property(self, value=None):
1195
if value is None: # get
1196
return dbus.UInt64(_timedelta_to_milliseconds(
1197
self.approval_duration))
1198
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1199
1200
# Name - property
1201
@dbus_service_property(_interface, signature="s", access="read")
1202
def Name_dbus_property(self):
1203
return dbus.String(self.name)
1204
1205
# Fingerprint - property
1206
@dbus_service_property(_interface, signature="s", access="read")
1207
def Fingerprint_dbus_property(self):
1208
return dbus.String(self.fingerprint)
1209
1210
# Host - property
1211
@dbus_service_property(_interface, signature="s",
1212
access="readwrite")
1213
def Host_dbus_property(self, value=None):
1214
if value is None: # get
1215
return dbus.String(self.host)
1216
self.host = value
1217
1218
# Created - property
1219
@dbus_service_property(_interface, signature="s", access="read")
1220
def Created_dbus_property(self):
1221
return dbus.String(datetime_to_dbus(self.created))
1222
1223
# LastEnabled - property
1224
@dbus_service_property(_interface, signature="s", access="read")
1225
def LastEnabled_dbus_property(self):
1226
return datetime_to_dbus(self.last_enabled)
1227
1228
# Enabled - property
1229
@dbus_service_property(_interface, signature="b",
1230
access="readwrite")
1231
def Enabled_dbus_property(self, value=None):
1232
if value is None: # get
1233
return dbus.Boolean(self.enabled)
1234
if value:
1235
self.enable()
1236
else:
1237
self.disable()
1238
1239
# LastCheckedOK - property
1240
@dbus_service_property(_interface, signature="s",
1241
access="readwrite")
1242
def LastCheckedOK_dbus_property(self, value=None):
1243
if value is not None:
1244
self.checked_ok()
1245
return
1246
return datetime_to_dbus(self.last_checked_ok)
1247
1248
# Expires - property
1249
@dbus_service_property(_interface, signature="s", access="read")
1250
def Expires_dbus_property(self):
1251
return datetime_to_dbus(self.expires)
1252
1253
# LastApprovalRequest - property
1254
@dbus_service_property(_interface, signature="s", access="read")
1255
def LastApprovalRequest_dbus_property(self):
1256
return datetime_to_dbus(self.last_approval_request)
1257
1258
# Timeout - property
1259
@dbus_service_property(_interface, signature="t",
1260
access="readwrite")
1261
def Timeout_dbus_property(self, value=None):
1262
if value is None: # get
1263
return dbus.UInt64(self.timeout_milliseconds())
1264
self.timeout = datetime.timedelta(0, 0, 0, value)
1265
if getattr(self, "disable_initiator_tag", None) is None:
1266
return
1267
# Reschedule timeout
1268
gobject.source_remove(self.disable_initiator_tag)
1269
self.disable_initiator_tag = None
1270
self.expires = None
1271
time_to_die = _timedelta_to_milliseconds((self
1272
.last_checked_ok
1273
+ self.timeout)
1274
- datetime.datetime
1275
.utcnow())
1276
if time_to_die <= 0:
1277
# The timeout has passed
1278
self.disable()
1279
else:
1280
self.expires = (datetime.datetime.utcnow()
1281
+ datetime.timedelta(milliseconds =
1282
time_to_die))
1283
self.disable_initiator_tag = (gobject.timeout_add
1284
(time_to_die, self.disable))
1285
1286
# ExtendedTimeout - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def ExtendedTimeout_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(self.extended_timeout_milliseconds())
1292
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1293
1294
# Interval - property
1295
@dbus_service_property(_interface, signature="t",
1296
access="readwrite")
1297
def Interval_dbus_property(self, value=None):
1298
if value is None: # get
1299
return dbus.UInt64(self.interval_milliseconds())
1300
self.interval = datetime.timedelta(0, 0, 0, value)
1301
if getattr(self, "checker_initiator_tag", None) is None:
1302
return
1303
# Reschedule checker run
1304
gobject.source_remove(self.checker_initiator_tag)
1305
self.checker_initiator_tag = (gobject.timeout_add
1306
(value, self.start_checker))
1307
self.start_checker() # Start one now, too
1308
1309
# Checker - property
1310
@dbus_service_property(_interface, signature="s",
1311
access="readwrite")
1312
def Checker_dbus_property(self, value=None):
1313
if value is None: # get
1314
return dbus.String(self.checker_command)
1315
self.checker_command = value
1316
1317
# CheckerRunning - property
1318
@dbus_service_property(_interface, signature="b",
1319
access="readwrite")
1320
def CheckerRunning_dbus_property(self, value=None):
1321
if value is None: # get
1322
return dbus.Boolean(self.checker is not None)
1323
if value:
1324
self.start_checker()
1325
else:
1326
self.stop_checker()
1327
1328
# ObjectPath - property
1329
@dbus_service_property(_interface, signature="o", access="read")
1330
def ObjectPath_dbus_property(self):
1331
return self.dbus_object_path # is already a dbus.ObjectPath
1332
1333
# Secret = property
1334
@dbus_service_property(_interface, signature="ay",
1335
access="write", byte_arrays=True)
1336
def Secret_dbus_property(self, value):
1337
self.secret = str(value)
1338
1339
del _interface
1340
1341
1342
class ProxyClient(object):
1343
def __init__(self, child_pipe, fpr, address):
1344
self._pipe = child_pipe
1345
self._pipe.send(('init', fpr, address))
1346
if not self._pipe.recv():
1347
raise KeyError()
1348
1349
def __getattribute__(self, name):
1350
if(name == '_pipe'):
1351
return super(ProxyClient, self).__getattribute__(name)
1352
self._pipe.send(('getattr', name))
1353
data = self._pipe.recv()
1354
if data[0] == 'data':
1355
return data[1]
1356
if data[0] == 'function':
1357
def func(*args, **kwargs):
1358
self._pipe.send(('funcall', name, args, kwargs))
1359
return self._pipe.recv()[1]
1360
return func
1361
1362
def __setattr__(self, name, value):
1363
if(name == '_pipe'):
1364
return super(ProxyClient, self).__setattr__(name, value)
1365
self._pipe.send(('setattr', name, value))
1366
1367
class ClientDBusTransitional(ClientDBus):
1368
__metaclass__ = AlternateDBusNamesMetaclass
1369
1370
class ClientHandler(socketserver.BaseRequestHandler, object):
1371
"""A class to handle client connections.
1372
1373
Instantiated once for each connection to handle it.
307
def still_valid(self, now=None):
308
"""Has the timeout not yet passed for this client?"""
309
if now is None:
310
now = datetime.datetime.now()
311
if self.last_seen is None:
312
return now < (self.created + self.timeout)
313
else:
314
return now < (self.last_seen + self.timeout)
315
316
317
def peer_certificate(session):
318
"Return the peer's OpenPGP certificate as a bytestring"
319
# If not an OpenPGP certificate...
320
if gnutls.library.functions.gnutls_certificate_type_get\
321
(session._c_object) \
322
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
323
# ...do the normal thing
324
return session.peer_certificate
325
list_size = ctypes.c_uint()
326
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
327
(session._c_object, ctypes.byref(list_size))
328
if list_size.value == 0:
329
return None
330
cert = cert_list[0]
331
return ctypes.string_at(cert.data, cert.size)
332
333
334
def fingerprint(openpgp):
335
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
336
# New empty GnuTLS certificate
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
338
gnutls.library.functions.gnutls_openpgp_crt_init\
339
(ctypes.byref(crt))
340
# New GnuTLS "datum" with the OpenPGP public key
341
datum = gnutls.library.types.gnutls_datum_t\
342
(ctypes.cast(ctypes.c_char_p(openpgp),
343
ctypes.POINTER(ctypes.c_ubyte)),
344
ctypes.c_uint(len(openpgp)))
345
# Import the OpenPGP public key into the certificate
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
347
(crt,
348
ctypes.byref(datum),
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
350
# New buffer for the fingerprint
351
buffer = ctypes.create_string_buffer(20)
352
buffer_length = ctypes.c_size_t()
353
# Get the fingerprint from the certificate into the buffer
354
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
355
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
356
# Deinit the certificate
357
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
358
# Convert the buffer to a Python bytestring
359
fpr = ctypes.string_at(buffer, buffer_length.value)
360
# Convert the bytestring to hexadecimal notation
361
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
362
return hex_fpr
363
364
365
class tcp_handler(SocketServer.BaseRequestHandler, object):
366
"""A TCP request handler class.
367
Instantiated by IPv6_TCPServer for each request to handle it.
1374
368
Note: This will run in its own forked process."""
1375
369
1376
370
def handle(self):
1377
with contextlib.closing(self.server.child_pipe) as child_pipe:
1378
logger.info("TCP connection from: %s",
1379
unicode(self.client_address))
1380
logger.debug("Pipe FD: %d",
1381
self.server.child_pipe.fileno())
1382
1383
session = (gnutls.connection
1384
.ClientSession(self.request,
1385
gnutls.connection
1386
.X509Credentials()))
1387
1388
# Note: gnutls.connection.X509Credentials is really a
1389
# generic GnuTLS certificate credentials object so long as
1390
# no X.509 keys are added to it. Therefore, we can use it
1391
# here despite using OpenPGP certificates.
1392
1393
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1394
# "+AES-256-CBC", "+SHA1",
1395
# "+COMP-NULL", "+CTYPE-OPENPGP",
1396
# "+DHE-DSS"))
1397
# Use a fallback default, since this MUST be set.
1398
priority = self.server.gnutls_priority
1399
if priority is None:
1400
priority = "NORMAL"
1401
(gnutls.library.functions
1402
.gnutls_priority_set_direct(session._c_object,
1403
priority, None))
1404
1405
# Start communication using the Mandos protocol
1406
# Get protocol number
1407
line = self.request.makefile().readline()
1408
logger.debug("Protocol version: %r", line)
1409
try:
1410
if int(line.strip().split()[0]) > 1:
1411
raise RuntimeError
1412
except (ValueError, IndexError, RuntimeError) as error:
1413
logger.error("Unknown protocol version: %s", error)
1414
return
1415
1416
# Start GnuTLS connection
1417
try:
1418
session.handshake()
1419
except gnutls.errors.GNUTLSError as error:
1420
logger.warning("Handshake failed: %s", error)
1421
# Do not run session.bye() here: the session is not
1422
# established. Just abandon the request.
1423
return
1424
logger.debug("Handshake succeeded")
1425
1426
approval_required = False
1427
try:
1428
try:
1429
fpr = self.fingerprint(self.peer_certificate
1430
(session))
1431
except (TypeError,
1432
gnutls.errors.GNUTLSError) as error:
1433
logger.warning("Bad certificate: %s", error)
1434
return
1435
logger.debug("Fingerprint: %s", fpr)
1436
if self.server.use_dbus:
1437
# Emit D-Bus signal
1438
client.NewRequest(str(self.client_address))
1439
1440
try:
1441
client = ProxyClient(child_pipe, fpr,
1442
self.client_address)
1443
except KeyError:
1444
return
1445
1446
if client.approval_delay:
1447
delay = client.approval_delay
1448
client.approvals_pending += 1
1449
approval_required = True
1450
1451
while True:
1452
if not client.enabled:
1453
logger.info("Client %s is disabled",
1454
client.name)
1455
if self.server.use_dbus:
1456
# Emit D-Bus signal
1457
client.Rejected("Disabled")
1458
return
1459
1460
if client._approved or not client.approval_delay:
1461
#We are approved or approval is disabled
1462
break
1463
elif client._approved is None:
1464
logger.info("Client %s needs approval",
1465
client.name)
1466
if self.server.use_dbus:
1467
# Emit D-Bus signal
1468
client.NeedApproval(
1469
client.approval_delay_milliseconds(),
1470
client.approved_by_default)
1471
else:
1472
logger.warning("Client %s was not approved",
1473
client.name)
1474
if self.server.use_dbus:
1475
# Emit D-Bus signal
1476
client.Rejected("Denied")
1477
return
1478
1479
#wait until timeout or approved
1480
time = datetime.datetime.now()
1481
client.changedstate.acquire()
1482
(client.changedstate.wait
1483
(float(client._timedelta_to_milliseconds(delay)
1484
/ 1000)))
1485
client.changedstate.release()
1486
time2 = datetime.datetime.now()
1487
if (time2 - time) >= delay:
1488
if not client.approved_by_default:
1489
logger.warning("Client %s timed out while"
1490
" waiting for approval",
1491
client.name)
1492
if self.server.use_dbus:
1493
# Emit D-Bus signal
1494
client.Rejected("Approval timed out")
1495
return
1496
else:
1497
break
1498
else:
1499
delay -= time2 - time
1500
1501
sent_size = 0
1502
while sent_size < len(client.secret):
1503
try:
1504
sent = session.send(client.secret[sent_size:])
1505
except gnutls.errors.GNUTLSError as error:
1506
logger.warning("gnutls send failed")
1507
return
1508
logger.debug("Sent: %d, remaining: %d",
1509
sent, len(client.secret)
1510
- (sent_size + sent))
1511
sent_size += sent
1512
1513
logger.info("Sending secret to %s", client.name)
1514
# bump the timeout using extended_timeout
1515
client.checked_ok(client.extended_timeout)
1516
if self.server.use_dbus:
1517
# Emit D-Bus signal
1518
client.GotSecret()
1519
1520
finally:
1521
if approval_required:
1522
client.approvals_pending -= 1
1523
try:
1524
session.bye()
1525
except gnutls.errors.GNUTLSError as error:
1526
logger.warning("GnuTLS bye failed")
1527
1528
@staticmethod
1529
def peer_certificate(session):
1530
"Return the peer's OpenPGP certificate as a bytestring"
1531
# If not an OpenPGP certificate...
1532
if (gnutls.library.functions
1533
.gnutls_certificate_type_get(session._c_object)
1534
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1535
# ...do the normal thing
1536
return session.peer_certificate
1537
list_size = ctypes.c_uint(1)
1538
cert_list = (gnutls.library.functions
1539
.gnutls_certificate_get_peers
1540
(session._c_object, ctypes.byref(list_size)))
1541
if not bool(cert_list) and list_size.value != 0:
1542
raise gnutls.errors.GNUTLSError("error getting peer"
1543
" certificate")
1544
if list_size.value == 0:
1545
return None
1546
cert = cert_list[0]
1547
return ctypes.string_at(cert.data, cert.size)
1548
1549
@staticmethod
1550
def fingerprint(openpgp):
1551
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1552
# New GnuTLS "datum" with the OpenPGP public key
1553
datum = (gnutls.library.types
1554
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1555
ctypes.POINTER
1556
(ctypes.c_ubyte)),
1557
ctypes.c_uint(len(openpgp))))
1558
# New empty GnuTLS certificate
1559
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1560
(gnutls.library.functions
1561
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1562
# Import the OpenPGP public key into the certificate
1563
(gnutls.library.functions
1564
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1565
gnutls.library.constants
1566
.GNUTLS_OPENPGP_FMT_RAW))
1567
# Verify the self signature in the key
1568
crtverify = ctypes.c_uint()
1569
(gnutls.library.functions
1570
.gnutls_openpgp_crt_verify_self(crt, 0,
1571
ctypes.byref(crtverify)))
1572
if crtverify.value != 0:
1573
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1574
raise (gnutls.errors.CertificateSecurityError
1575
("Verify failed"))
1576
# New buffer for the fingerprint
1577
buf = ctypes.create_string_buffer(20)
1578
buf_len = ctypes.c_size_t()
1579
# Get the fingerprint from the certificate into the buffer
1580
(gnutls.library.functions
1581
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1582
ctypes.byref(buf_len)))
1583
# Deinit the certificate
1584
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1585
# Convert the buffer to a Python bytestring
1586
fpr = ctypes.string_at(buf, buf_len.value)
1587
# Convert the bytestring to hexadecimal notation
1588
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1589
return hex_fpr
1590
1591
1592
class MultiprocessingMixIn(object):
1593
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1594
def sub_process_main(self, request, address):
1595
try:
1596
self.finish_request(request, address)
1597
except:
1598
self.handle_error(request, address)
1599
self.close_request(request)
1600
1601
def process_request(self, request, address):
1602
"""Start a new process to process the request."""
1603
proc = multiprocessing.Process(target = self.sub_process_main,
1604
args = (request,
1605
address))
1606
proc.start()
1607
return proc
1608
1609
1610
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1611
""" adds a pipe to the MixIn """
1612
def process_request(self, request, client_address):
1613
"""Overrides and wraps the original process_request().
1614
1615
This function creates a new pipe in self.pipe
1616
"""
1617
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1618
1619
proc = MultiprocessingMixIn.process_request(self, request,
1620
client_address)
1621
self.child_pipe.close()
1622
self.add_pipe(parent_pipe, proc)
1623
1624
def add_pipe(self, parent_pipe, proc):
1625
"""Dummy function; override as necessary"""
1626
raise NotImplementedError
1627
1628
1629
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1630
socketserver.TCPServer, object):
1631
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1632
371
logger.debug(u"TCP connection from: %s",
372
unicode(self.client_address))
373
session = gnutls.connection.ClientSession(self.request,
374
gnutls.connection.\
375
X509Credentials())
376
377
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
378
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
379
# "+DHE-DSS"))
380
priority = "SECURE256"
381
382
gnutls.library.functions.gnutls_priority_set_direct\
383
(session._c_object, priority, None);
384
385
try:
386
session.handshake()
387
except gnutls.errors.GNUTLSError, error:
388
logger.debug(u"Handshake failed: %s", error)
389
# Do not run session.bye() here: the session is not
390
# established. Just abandon the request.
391
return
392
try:
393
fpr = fingerprint(peer_certificate(session))
394
except (TypeError, gnutls.errors.GNUTLSError), error:
395
logger.debug(u"Bad certificate: %s", error)
396
session.bye()
397
return
398
logger.debug(u"Fingerprint: %s", fpr)
399
client = None
400
for c in self.server.clients:
401
if c.fingerprint == fpr:
402
client = c
403
break
404
# Have to check if client.still_valid(), since it is possible
405
# that the client timed out while establishing the GnuTLS
406
# session.
407
if (not client) or (not client.still_valid()):
408
if client:
409
logger.debug(u"Client %(name)s is invalid",
410
vars(client))
411
else:
412
logger.debug(u"Client not found for fingerprint: %s",
413
fpr)
414
session.bye()
415
return
416
sent_size = 0
417
while sent_size < len(client.secret):
418
sent = session.send(client.secret[sent_size:])
419
logger.debug(u"Sent: %d, remaining: %d",
420
sent, len(client.secret)
421
- (sent_size + sent))
422
sent_size += sent
423
session.bye()
424
425
426
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
427
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1633
428
Attributes:
1634
enabled: Boolean; whether this server is activated yet
1635
interface: None or a network interface name (string)
1636
use_ipv6: Boolean; to use IPv6 or not
429
options: Command line options
430
clients: Set() of Client objects
1637
431
"""
1638
def __init__(self, server_address, RequestHandlerClass,
1639
interface=None, use_ipv6=True):
1640
self.interface = interface
1641
if use_ipv6:
1642
self.address_family = socket.AF_INET6
1643
socketserver.TCPServer.__init__(self, server_address,
1644
RequestHandlerClass)
432
address_family = socket.AF_INET6
433
def __init__(self, *args, **kwargs):
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
437
if "clients" in kwargs:
438
self.clients = kwargs["clients"]
439
del kwargs["clients"]
440
return super(type(self), self).__init__(*args, **kwargs)
1645
441
def server_bind(self):
1646
442
"""This overrides the normal server_bind() function
1647
443
to bind to an interface if one was specified, and also NOT to
1648
444
bind to an address or port if they were not specified."""
1649
if self.interface is not None:
1650
if SO_BINDTODEVICE is None:
1651
logger.error("SO_BINDTODEVICE does not exist;"
1652
" cannot bind to interface %s",
1653
self.interface)
1654
else:
1655
try:
1656
self.socket.setsockopt(socket.SOL_SOCKET,
1657
SO_BINDTODEVICE,
1658
str(self.interface
1659
+ '\0'))
1660
except socket.error as error:
1661
if error[0] == errno.EPERM:
1662
logger.error("No permission to"
1663
" bind to interface %s",
1664
self.interface)
1665
elif error[0] == errno.ENOPROTOOPT:
1666
logger.error("SO_BINDTODEVICE not available;"
1667
" cannot bind to interface %s",
1668
self.interface)
1669
else:
1670
raise
445
if self.options.interface:
446
if not hasattr(socket, "SO_BINDTODEVICE"):
447
# From /usr/include/asm-i486/socket.h
448
socket.SO_BINDTODEVICE = 25
449
try:
450
self.socket.setsockopt(socket.SOL_SOCKET,
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
453
except socket.error, error:
454
if error[0] == errno.EPERM:
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
458
else:
459
raise error
1671
460
# Only bind(2) the socket if we really need to.
1672
461
if self.server_address[0] or self.server_address[1]:
1673
462
if not self.server_address[0]:
1674
if self.address_family == socket.AF_INET6:
1675
any_address = "::" # in6addr_any
1676
else:
1677
any_address = socket.INADDR_ANY
1678
self.server_address = (any_address,
463
in6addr_any = "::"
464
self.server_address = (in6addr_any,
1679
465
self.server_address[1])
1680
elif not self.server_address[1]:
466
elif self.server_address[1] is None:
1681
467
self.server_address = (self.server_address[0],
1682
468
0)
1683
# if self.interface:
1684
# self.server_address = (self.server_address[0],
1685
# 0, # port
1686
# 0, # flowinfo
1687
# if_nametoindex
1688
# (self.interface))
1689
return socketserver.TCPServer.server_bind(self)
1690
1691
1692
class MandosServer(IPv6_TCPServer):
1693
"""Mandos server.
1694
1695
Attributes:
1696
clients: set of Client objects
1697
gnutls_priority GnuTLS priority string
1698
use_dbus: Boolean; to emit D-Bus signals or not
1699
1700
Assumes a gobject.MainLoop event loop.
1701
"""
1702
def __init__(self, server_address, RequestHandlerClass,
1703
interface=None, use_ipv6=True, clients=None,
1704
gnutls_priority=None, use_dbus=True):
1705
self.enabled = False
1706
self.clients = clients
1707
if self.clients is None:
1708
self.clients = {}
1709
self.use_dbus = use_dbus
1710
self.gnutls_priority = gnutls_priority
1711
IPv6_TCPServer.__init__(self, server_address,
1712
RequestHandlerClass,
1713
interface = interface,
1714
use_ipv6 = use_ipv6)
1715
def server_activate(self):
1716
if self.enabled:
1717
return socketserver.TCPServer.server_activate(self)
1718
1719
def enable(self):
1720
self.enabled = True
1721
1722
def add_pipe(self, parent_pipe, proc):
1723
# Call "handle_ipc" for both data and EOF events
1724
gobject.io_add_watch(parent_pipe.fileno(),
1725
gobject.IO_IN | gobject.IO_HUP,
1726
functools.partial(self.handle_ipc,
1727
parent_pipe =
1728
parent_pipe,
1729
proc = proc))
1730
1731
def handle_ipc(self, source, condition, parent_pipe=None,
1732
proc = None, client_object=None):
1733
condition_names = {
1734
gobject.IO_IN: "IN", # There is data to read.
1735
gobject.IO_OUT: "OUT", # Data can be written (without
1736
# blocking).
1737
gobject.IO_PRI: "PRI", # There is urgent data to read.
1738
gobject.IO_ERR: "ERR", # Error condition.
1739
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1740
# broken, usually for pipes and
1741
# sockets).
1742
}
1743
conditions_string = ' | '.join(name
1744
for cond, name in
1745
condition_names.iteritems()
1746
if cond & condition)
1747
# error, or the other end of multiprocessing.Pipe has closed
1748
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1749
# Wait for other process to exit
1750
proc.join()
1751
return False
1752
1753
# Read a request from the child
1754
request = parent_pipe.recv()
1755
command = request[0]
1756
1757
if command == 'init':
1758
fpr = request[1]
1759
address = request[2]
1760
1761
for c in self.clients.itervalues():
1762
if c.fingerprint == fpr:
1763
client = c
1764
break
1765
else:
1766
logger.info("Client not found for fingerprint: %s, ad"
1767
"dress: %s", fpr, address)
1768
if self.use_dbus:
1769
# Emit D-Bus signal
1770
mandos_dbus_service.ClientNotFound(fpr,
1771
address[0])
1772
parent_pipe.send(False)
1773
return False
1774
1775
gobject.io_add_watch(parent_pipe.fileno(),
1776
gobject.IO_IN | gobject.IO_HUP,
1777
functools.partial(self.handle_ipc,
1778
parent_pipe =
1779
parent_pipe,
1780
proc = proc,
1781
client_object =
1782
client))
1783
parent_pipe.send(True)
1784
# remove the old hook in favor of the new above hook on
1785
# same fileno
1786
return False
1787
if command == 'funcall':
1788
funcname = request[1]
1789
args = request[2]
1790
kwargs = request[3]
1791
1792
parent_pipe.send(('data', getattr(client_object,
1793
funcname)(*args,
1794
**kwargs)))
1795
1796
if command == 'getattr':
1797
attrname = request[1]
1798
if callable(client_object.__getattribute__(attrname)):
1799
parent_pipe.send(('function',))
1800
else:
1801
parent_pipe.send(('data', client_object
1802
.__getattribute__(attrname)))
1803
1804
if command == 'setattr':
1805
attrname = request[1]
1806
value = request[2]
1807
setattr(client_object, attrname, value)
1808
1809
return True
469
return super(type(self), self).server_bind()
1810
470
1811
471
1812
472
def string_to_delta(interval):
1813
473
"""Parse a string and return a datetime.timedelta
1814
474
1815
475
>>> string_to_delta('7d')
1816
476
datetime.timedelta(7)
1817
477
>>> string_to_delta('60s')
1820
480
datetime.timedelta(0, 3600)
1821
481
>>> string_to_delta('24h')
1822
482
datetime.timedelta(1)
1823
>>> string_to_delta('1w')
483
>>> string_to_delta(u'1w')
1824
484
datetime.timedelta(7)
1825
>>> string_to_delta('5m 30s')
1826
datetime.timedelta(0, 330)
1827
485
"""
1828
timevalue = datetime.timedelta(0)
1829
for s in interval.split():
1830
try:
1831
suffix = unicode(s[-1])
1832
value = int(s[:-1])
1833
if suffix == "d":
1834
delta = datetime.timedelta(value)
1835
elif suffix == "s":
1836
delta = datetime.timedelta(0, value)
1837
elif suffix == "m":
1838
delta = datetime.timedelta(0, 0, 0, 0, value)
1839
elif suffix == "h":
1840
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1841
elif suffix == "w":
1842
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1843
else:
1844
raise ValueError("Unknown suffix %r" % suffix)
1845
except (ValueError, IndexError) as e:
1846
raise ValueError(*(e.args))
1847
timevalue += delta
1848
return timevalue
486
try:
487
suffix=unicode(interval[-1])
488
value=int(interval[:-1])
489
if suffix == u"d":
490
delta = datetime.timedelta(value)
491
elif suffix == u"s":
492
delta = datetime.timedelta(0, value)
493
elif suffix == u"m":
494
delta = datetime.timedelta(0, 0, 0, 0, value)
495
elif suffix == u"h":
496
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
497
elif suffix == u"w":
498
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
499
else:
500
raise ValueError
501
except (ValueError, IndexError):
502
raise ValueError
503
return delta
504
505
506
def add_service():
507
"""Derived from the Avahi example code"""
508
global group, serviceName, serviceType, servicePort, serviceTXT, \
509
domain, host
510
if group is None:
511
group = dbus.Interface(
512
bus.get_object( avahi.DBUS_NAME,
513
server.EntryGroupNew()),
514
avahi.DBUS_INTERFACE_ENTRY_GROUP)
515
group.connect_to_signal('StateChanged',
516
entry_group_state_changed)
517
logger.debug(u"Adding service '%s' of type '%s' ...",
518
serviceName, serviceType)
519
520
group.AddService(
521
serviceInterface, # interface
522
avahi.PROTO_INET6, # protocol
523
dbus.UInt32(0), # flags
524
serviceName, serviceType,
525
domain, host,
526
dbus.UInt16(servicePort),
527
avahi.string_array_to_txt_array(serviceTXT))
528
group.Commit()
529
530
531
def remove_service():
532
"""From the Avahi example code"""
533
global group
534
535
if not group is None:
536
group.Reset()
537
538
539
def server_state_changed(state):
540
"""Derived from the Avahi example code"""
541
if state == avahi.SERVER_COLLISION:
542
logger.warning(u"Server name collision")
543
remove_service()
544
elif state == avahi.SERVER_RUNNING:
545
add_service()
546
547
548
def entry_group_state_changed(state, error):
549
"""Derived from the Avahi example code"""
550
global serviceName, server, rename_count
551
552
logger.debug(u"state change: %i", state)
553
554
if state == avahi.ENTRY_GROUP_ESTABLISHED:
555
logger.debug(u"Service established.")
556
elif state == avahi.ENTRY_GROUP_COLLISION:
557
558
rename_count = rename_count - 1
559
if rename_count > 0:
560
name = server.GetAlternativeServiceName(name)
561
logger.warning(u"Service name collision, "
562
u"changing name to '%s' ...", name)
563
remove_service()
564
add_service()
565
566
else:
567
logger.error(u"No suitable service name found after %i"
568
u" retries, exiting.", n_rename)
569
killme(1)
570
elif state == avahi.ENTRY_GROUP_FAILURE:
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
1849
574
1850
575
1851
576
def if_nametoindex(interface):
1852
"""Call the C function if_nametoindex(), or equivalent
1853
1854
Note: This function cannot accept a unicode string."""
1855
global if_nametoindex
577
"""Call the C function if_nametoindex()"""
1856
578
try:
1857
if_nametoindex = (ctypes.cdll.LoadLibrary
1858
(ctypes.util.find_library("c"))
1859
.if_nametoindex)
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
1860
581
except (OSError, AttributeError):
1861
logger.warning("Doing if_nametoindex the hard way")
1862
def if_nametoindex(interface):
1863
"Get an interface index the hard way, i.e. using fcntl()"
1864
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1865
with contextlib.closing(socket.socket()) as s:
1866
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1867
struct.pack(str("16s16x"),
1868
interface))
1869
interface_index = struct.unpack(str("I"),
1870
ifreq[16:20])[0]
1871
return interface_index
1872
return if_nametoindex(interface)
1873
1874
1875
def daemon(nochdir = False, noclose = False):
582
if "struct" not in sys.modules:
583
import struct
584
if "fcntl" not in sys.modules:
585
import fcntl
586
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
587
s = socket.socket()
588
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
589
struct.pack("16s16x", interface))
590
s.close()
591
interface_index = struct.unpack("I", ifreq[16:20])[0]
592
return interface_index
593
594
595
def daemon(nochdir, noclose):
1876
596
"""See daemon(3). Standard BSD Unix function.
1877
1878
597
This should really exist as os.daemon, but it doesn't (yet)."""
1879
598
if os.fork():
1880
599
sys.exit()
1881
600
os.setsid()
1882
601
if not nochdir:
1883
602
os.chdir("/")
1884
if os.fork():
1885
sys.exit()
1886
603
if not noclose:
1887
604
# Close all standard open file descriptors
1888
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
1889
606
if not stat.S_ISCHR(os.fstat(null).st_mode):
1890
607
raise OSError(errno.ENODEV,
1891
"%s not a character device"
1892
% os.path.devnull)
608
"/dev/null not a character device")
1893
609
os.dup2(null, sys.stdin.fileno())
1894
610
os.dup2(null, sys.stdout.fileno())
1895
611
os.dup2(null, sys.stderr.fileno())
1897
613
os.close(null)
1898
614
1899
615
616
def killme(status = 0):
617
logger.debug("Stopping server with exit status %d", status)
618
exitstatus = status
619
if main_loop_started:
620
main_loop.quit()
621
else:
622
sys.exit(status)
623
624
1900
625
def main():
1901
1902
##################################################################
1903
# Parsing of options, both command line and config file
1904
1905
parser = argparse.ArgumentParser()
1906
parser.add_argument("-v", "--version", action="version",
1907
version = "%%(prog)s %s" % version,
1908
help="show version number and exit")
1909
parser.add_argument("-i", "--interface", metavar="IF",
1910
help="Bind to interface IF")
1911
parser.add_argument("-a", "--address",
1912
help="Address to listen for requests on")
1913
parser.add_argument("-p", "--port", type=int,
1914
help="Port number to receive requests on")
1915
parser.add_argument("--check", action="store_true",
1916
help="Run self-test")
1917
parser.add_argument("--debug", action="store_true",
1918
help="Debug mode; run in foreground and log"
1919
" to terminal")
1920
parser.add_argument("--debuglevel", metavar="LEVEL",
1921
help="Debug level for stdout output")
1922
parser.add_argument("--priority", help="GnuTLS"
1923
" priority string (see GnuTLS documentation)")
1924
parser.add_argument("--servicename",
1925
metavar="NAME", help="Zeroconf service name")
1926
parser.add_argument("--configdir",
1927
default="/etc/mandos", metavar="DIR",
1928
help="Directory to search for configuration"
1929
" files")
1930
parser.add_argument("--no-dbus", action="store_false",
1931
dest="use_dbus", help="Do not provide D-Bus"
1932
" system bus interface")
1933
parser.add_argument("--no-ipv6", action="store_false",
1934
dest="use_ipv6", help="Do not use IPv6")
1935
parser.add_argument("--no-restore", action="store_false",
1936
dest="restore", help="Do not restore stored state",
1937
default=True)
1938
1939
options = parser.parse_args()
626
global exitstatus
627
exitstatus = 0
628
global main_loop_started
629
main_loop_started = False
630
631
parser = OptionParser()
632
parser.add_option("-i", "--interface", type="string",
633
default=None, metavar="IF",
634
help="Bind to interface IF")
635
parser.add_option("-a", "--address", type="string", default=None,
636
help="Address to listen for requests on")
637
parser.add_option("-p", "--port", type="int", default=None,
638
help="Port number to receive requests on")
639
parser.add_option("--timeout", type="string", # Parsed later
640
default="1h",
641
help="Amount of downtime allowed for clients")
642
parser.add_option("--interval", type="string", # Parsed later
643
default="5m",
644
help="How often to check that a client is up")
645
parser.add_option("--check", action="store_true", default=False,
646
help="Run self-test")
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
649
(options, args) = parser.parse_args()
1940
650
1941
651
if options.check:
1942
652
import doctest
1943
653
doctest.testmod()
1944
654
sys.exit()
1945
655
1946
# Default values for config file for server-global settings
1947
server_defaults = { "interface": "",
1948
"address": "",
1949
"port": "",
1950
"debug": "False",
1951
"priority":
1952
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1953
"servicename": "Mandos",
1954
"use_dbus": "True",
1955
"use_ipv6": "True",
1956
"debuglevel": "",
1957
}
1958
1959
# Parse config file for server-global settings
1960
server_config = configparser.SafeConfigParser(server_defaults)
1961
del server_defaults
1962
server_config.read(os.path.join(options.configdir,
1963
"mandos.conf"))
1964
# Convert the SafeConfigParser object to a dict
1965
server_settings = server_config.defaults()
1966
# Use the appropriate methods on the non-string config options
1967
for option in ("debug", "use_dbus", "use_ipv6"):
1968
server_settings[option] = server_config.getboolean("DEFAULT",
1969
option)
1970
if server_settings["port"]:
1971
server_settings["port"] = server_config.getint("DEFAULT",
1972
"port")
1973
del server_config
1974
1975
# Override the settings from the config file with command line
1976
# options, if set.
1977
for option in ("interface", "address", "port", "debug",
1978
"priority", "servicename", "configdir",
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
1980
value = getattr(options, option)
1981
if value is not None:
1982
server_settings[option] = value
1983
del options
1984
# Force all strings to be unicode
1985
for option in server_settings.keys():
1986
if type(server_settings[option]) is str:
1987
server_settings[option] = unicode(server_settings[option])
1988
# Now we have our good server settings in "server_settings"
1989
1990
##################################################################
1991
1992
# For convenience
1993
debug = server_settings["debug"]
1994
debuglevel = server_settings["debuglevel"]
1995
use_dbus = server_settings["use_dbus"]
1996
use_ipv6 = server_settings["use_ipv6"]
1997
1998
if server_settings["servicename"] != "Mandos":
1999
syslogger.setFormatter(logging.Formatter
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
2002
% server_settings["servicename"]))
2003
2004
# Parse config file with clients
2005
client_defaults = { "timeout": "5m",
2006
"extended_timeout": "15m",
2007
"interval": "2m",
2008
"checker": "fping -q -- %%(host)s",
2009
"host": "",
2010
"approval_delay": "0s",
2011
"approval_duration": "1s",
2012
}
2013
client_config = configparser.SafeConfigParser(client_defaults)
2014
client_config.read(os.path.join(server_settings["configdir"],
2015
"clients.conf"))
2016
2017
global mandos_dbus_service
2018
mandos_dbus_service = None
2019
2020
tcp_server = MandosServer((server_settings["address"],
2021
server_settings["port"]),
2022
ClientHandler,
2023
interface=(server_settings["interface"]
2024
or None),
2025
use_ipv6=use_ipv6,
2026
gnutls_priority=
2027
server_settings["priority"],
2028
use_dbus=use_dbus)
2029
if not debug:
2030
pidfilename = "/var/run/mandos.pid"
2031
try:
2032
pidfile = open(pidfilename, "w")
2033
except IOError:
2034
logger.error("Could not open file %r", pidfilename)
2035
2036
try:
2037
uid = pwd.getpwnam("_mandos").pw_uid
2038
gid = pwd.getpwnam("_mandos").pw_gid
2039
except KeyError:
2040
try:
2041
uid = pwd.getpwnam("mandos").pw_uid
2042
gid = pwd.getpwnam("mandos").pw_gid
2043
except KeyError:
2044
try:
2045
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
2047
except KeyError:
2048
uid = 65534
2049
gid = 65534
2050
try:
2051
os.setgid(gid)
2052
os.setuid(uid)
2053
except OSError as error:
2054
if error[0] != errno.EPERM:
2055
raise error
2056
2057
if not debug and not debuglevel:
2058
logger.setLevel(logging.WARNING)
2059
if debuglevel:
2060
level = getattr(logging, debuglevel.upper())
2061
logger.setLevel(level)
2062
2063
if debug:
2064
logger.setLevel(logging.DEBUG)
2065
# Enable all possible GnuTLS debugging
2066
2067
# "Use a log level over 10 to enable all debugging options."
2068
# - GnuTLS manual
2069
gnutls.library.functions.gnutls_global_set_log_level(11)
2070
2071
@gnutls.library.types.gnutls_log_func
2072
def debug_gnutls(level, string):
2073
logger.debug("GnuTLS: %s", string[:-1])
2074
2075
(gnutls.library.functions
2076
.gnutls_global_set_log_function(debug_gnutls))
2077
2078
# Redirect stdin so all checkers get /dev/null
2079
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2080
os.dup2(null, sys.stdin.fileno())
2081
if null > 2:
2082
os.close(null)
2083
else:
2084
# No console logging
2085
logger.removeHandler(console)
2086
2087
# Need to fork before connecting to D-Bus
2088
if not debug:
2089
# Close all input and output, do double fork, etc.
2090
daemon()
656
# Parse the time arguments
657
try:
658
options.timeout = string_to_delta(options.timeout)
659
except ValueError:
660
parser.error("option --timeout: Unparseable time")
661
try:
662
options.interval = string_to_delta(options.interval)
663
except ValueError:
664
parser.error("option --interval: Unparseable time")
665
666
# Parse config file
667
defaults = { "checker": "fping -q -- %%(fqdn)s" }
668
client_config = ConfigParser.SafeConfigParser(defaults)
669
#client_config.readfp(open("global.conf"), "global.conf")
670
client_config.read("mandos-clients.conf")
2091
671
2092
672
global main_loop
673
global bus
674
global server
2093
675
# From the Avahi example code
2094
676
DBusGMainLoop(set_as_default=True )
2095
677
main_loop = gobject.MainLoop()
2096
678
bus = dbus.SystemBus()
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
2097
682
# End of Avahi example code
2098
if use_dbus:
2099
try:
2100
bus_name = dbus.service.BusName("se.recompile.Mandos",
2101
bus, do_not_queue=True)
2102
old_bus_name = (dbus.service.BusName
2103
("se.bsnet.fukt.Mandos", bus,
2104
do_not_queue=True))
2105
except dbus.exceptions.NameExistsException as e:
2106
logger.error(unicode(e) + ", disabling D-Bus")
2107
use_dbus = False
2108
server_settings["use_dbus"] = False
2109
tcp_server.use_dbus = False
2110
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2111
service = AvahiServiceToSyslog(name =
2112
server_settings["servicename"],
2113
servicetype = "_mandos._tcp",
2114
protocol = protocol, bus = bus)
2115
if server_settings["interface"]:
2116
service.interface = (if_nametoindex
2117
(str(server_settings["interface"])))
2118
2119
global multiprocessing_manager
2120
multiprocessing_manager = multiprocessing.Manager()
2121
2122
client_class = Client
2123
if use_dbus:
2124
client_class = functools.partial(ClientDBusTransitional,
2125
bus = bus)
2126
2127
special_settings = {
2128
# Some settings need to be accessd by special methods;
2129
# booleans need .getboolean(), etc. Here is a list of them:
2130
"approved_by_default":
2131
lambda section:
2132
client_config.getboolean(section, "approved_by_default"),
2133
}
2134
# Construct a new dict of client settings of this form:
2135
# { client_name: {setting_name: value, ...}, ...}
2136
# with exceptions for any special settings as defined above
2137
client_settings = dict((clientname,
2138
dict((setting,
2139
(value if setting not in special_settings
2140
else special_settings[setting](clientname)))
2141
for setting, value in client_config.items(clientname)))
2142
for clientname in client_config.sections())
2143
2144
old_client_settings = {}
2145
clients_data = []
2146
2147
# Get client data and settings from last running state.
2148
if server_settings["restore"]:
2149
try:
2150
with open(stored_state_path, "rb") as stored_state:
2151
clients_data, old_client_settings = pickle.load(stored_state)
2152
os.remove(stored_state_path)
2153
except IOError as e:
2154
logger.warning("Could not load persistant state: {0}".format(e))
2155
if e.errno != errno.ENOENT:
2156
raise
2157
2158
for client in clients_data:
2159
client_name = client["name"]
2160
2161
# Decide which value to use after restoring saved state.
2162
# We have three different values: Old config file,
2163
# new config file, and saved state.
2164
# New config value takes precedence if it differs from old
2165
# config value, otherwise use saved state.
2166
for name, value in client_settings[client_name].items():
2167
try:
2168
# For each value in new config, check if it differs
2169
# from the old config value (Except for the "secret"
2170
# attribute)
2171
if name != "secret" and value != old_client_settings[client_name][name]:
2172
setattr(client, name, value)
2173
except KeyError:
2174
pass
2175
2176
# Clients who has passed its expire date, can still be enabled if its
2177
# last checker was sucessful. Clients who checkers failed before we
2178
# stored it state is asumed to had failed checker during downtime.
2179
if client["enabled"] and client["last_checked_ok"]:
2180
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2181
> client["interval"]):
2182
if client["last_checker_status"] != 0:
2183
client["enabled"] = False
2184
else:
2185
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2186
2187
client["changedstate"] = (multiprocessing_manager
2188
.Condition(multiprocessing_manager
2189
.Lock()))
2190
if use_dbus:
2191
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2192
tcp_server.clients[client_name] = new_client
2193
new_client.bus = bus
2194
for name, value in client.iteritems():
2195
setattr(new_client, name, value)
2196
client_object_name = unicode(client_name).translate(
2197
{ord("."): ord("_"),
2198
ord("-"): ord("_")})
2199
new_client.dbus_object_path = (dbus.ObjectPath
2200
("/clients/" + client_object_name))
2201
DBusObjectWithProperties.__init__(new_client,
2202
new_client.bus,
2203
new_client.dbus_object_path)
2204
else:
2205
tcp_server.clients[client_name] = Client.__new__(Client)
2206
for name, value in client.iteritems():
2207
setattr(tcp_server.clients[client_name], name, value)
2208
2209
tcp_server.clients[client_name].decrypt_secret(
2210
client_settings[client_name]["secret"])
2211
2212
# Create/remove clients based on new changes made to config
2213
for clientname in set(old_client_settings) - set(client_settings):
2214
del tcp_server.clients[clientname]
2215
for clientname in set(client_settings) - set(old_client_settings):
2216
tcp_server.clients[clientname] = (client_class(name = clientname,
2217
config =
2218
client_settings
2219
[clientname]))
2220
2221
2222
if not tcp_server.clients:
2223
logger.warning("No clients defined")
2224
683
684
debug = options.debug
685
686
if debug:
687
console = logging.StreamHandler()
688
# console.setLevel(logging.DEBUG)
689
console.setFormatter(logging.Formatter\
690
('%(levelname)s: %(message)s'))
691
logger.addHandler(console)
692
del console
693
694
clients = Set()
695
def remove_from_clients(client):
696
clients.remove(client)
697
if not clients:
698
logger.debug(u"No clients left, exiting")
699
killme()
700
701
clients.update(Set(Client(name=section, options=options,
702
stop_hook = remove_from_clients,
703
**(dict(client_config\
704
.items(section))))
705
for section in client_config.sections()))
706
2225
707
if not debug:
2226
try:
2227
with pidfile:
2228
pid = os.getpid()
2229
pidfile.write(str(pid) + "\n".encode("utf-8"))
2230
del pidfile
2231
except IOError:
2232
logger.error("Could not write to file %r with PID %d",
2233
pidfilename, pid)
2234
except NameError:
2235
# "pidfile" was never created
2236
pass
2237
del pidfilename
2238
2239
signal.signal(signal.SIGINT, signal.SIG_IGN)
2240
2241
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2242
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2243
2244
if use_dbus:
2245
class MandosDBusService(dbus.service.Object):
2246
"""A D-Bus proxy object"""
2247
def __init__(self):
2248
dbus.service.Object.__init__(self, bus, "/")
2249
_interface = "se.recompile.Mandos"
2250
2251
@dbus.service.signal(_interface, signature="o")
2252
def ClientAdded(self, objpath):
2253
"D-Bus signal"
2254
pass
2255
2256
@dbus.service.signal(_interface, signature="ss")
2257
def ClientNotFound(self, fingerprint, address):
2258
"D-Bus signal"
2259
pass
2260
2261
@dbus.service.signal(_interface, signature="os")
2262
def ClientRemoved(self, objpath, name):
2263
"D-Bus signal"
2264
pass
2265
2266
@dbus.service.method(_interface, out_signature="ao")
2267
def GetAllClients(self):
2268
"D-Bus method"
2269
return dbus.Array(c.dbus_object_path
2270
for c in
2271
tcp_server.clients.itervalues())
2272
2273
@dbus.service.method(_interface,
2274
out_signature="a{oa{sv}}")
2275
def GetAllClientsWithProperties(self):
2276
"D-Bus method"
2277
return dbus.Dictionary(
2278
((c.dbus_object_path, c.GetAll(""))
2279
for c in tcp_server.clients.itervalues()),
2280
signature="oa{sv}")
2281
2282
@dbus.service.method(_interface, in_signature="o")
2283
def RemoveClient(self, object_path):
2284
"D-Bus method"
2285
for c in tcp_server.clients.itervalues():
2286
if c.dbus_object_path == object_path:
2287
del tcp_server.clients[c.name]
2288
c.remove_from_connection()
2289
# Don't signal anything except ClientRemoved
2290
c.disable(quiet=True)
2291
# Emit D-Bus signal
2292
self.ClientRemoved(object_path, c.name)
2293
return
2294
raise KeyError(object_path)
2295
2296
del _interface
2297
2298
class MandosDBusServiceTransitional(MandosDBusService):
2299
__metaclass__ = AlternateDBusNamesMetaclass
2300
mandos_dbus_service = MandosDBusServiceTransitional()
708
daemon(False, False)
2301
709
2302
710
def cleanup():
2303
711
"Cleanup function; run on exit"
2304
service.cleanup()
2305
2306
multiprocessing.active_children()
2307
if not (tcp_server.clients or client_settings):
2308
return
2309
2310
# Store client before exiting. Secrets are encrypted with key based
2311
# on what config file has. If config file is removed/edited, old
2312
# secret will thus be unrecovable.
2313
clients = []
2314
for client in tcp_server.clients.itervalues():
2315
client.encrypt_secret(client_settings[client.name]["secret"])
2316
2317
client_dict = {}
2318
2319
# A list of attributes that will not be stored when shuting down.
2320
exclude = set(("bus", "changedstate", "secret"))
2321
for name, typ in inspect.getmembers(dbus.service.Object):
2322
exclude.add(name)
2323
2324
client_dict["encrypted_secret"] = client.encrypted_secret
2325
for attr in client.client_structure:
2326
if attr not in exclude:
2327
client_dict[attr] = getattr(client, attr)
2328
2329
clients.append(client_dict)
2330
del client_settings[client.name]["secret"]
2331
2332
try:
2333
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2334
pickle.dump((clients, client_settings), stored_state)
2335
except IOError as e:
2336
logger.warning("Could not save persistant state: {0}".format(e))
2337
if e.errno != errno.ENOENT:
2338
raise
2339
2340
# Delete all clients, and settings from config
2341
while tcp_server.clients:
2342
name, client = tcp_server.clients.popitem()
2343
if use_dbus:
2344
client.remove_from_connection()
2345
# Don't signal anything except ClientRemoved
2346
client.disable(quiet=True)
2347
if use_dbus:
2348
# Emit D-Bus signal
2349
mandos_dbus_service.ClientRemoved(client
2350
.dbus_object_path,
2351
client.name)
2352
client_settings.clear()
2353
2354
atexit.register(cleanup)
2355
2356
for client in tcp_server.clients.itervalues():
2357
if use_dbus:
2358
# Emit D-Bus signal
2359
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2360
# Need to initiate checking of clients
2361
if client.enabled:
2362
client.init_checker()
2363
2364
2365
tcp_server.enable()
2366
tcp_server.server_activate()
2367
2368
# Find out what port we got
2369
service.port = tcp_server.socket.getsockname()[1]
2370
if use_ipv6:
2371
logger.info("Now listening on address %r, port %d,"
2372
" flowinfo %d, scope_id %d"
2373
% tcp_server.socket.getsockname())
2374
else: # IPv4
2375
logger.info("Now listening on address %r, port %d"
2376
% tcp_server.socket.getsockname())
2377
2378
#service.interface = tcp_server.socket.getsockname()[3]
2379
2380
try:
712
global group
2381
713
# From the Avahi example code
2382
try:
2383
service.activate()
2384
except dbus.exceptions.DBusException as error:
2385
logger.critical("DBusException: %s", error)
2386
cleanup()
2387
sys.exit(1)
714
if not group is None:
715
group.Free()
716
group = None
2388
717
# End of Avahi example code
2389
718
2390
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2391
lambda *args, **kwargs:
2392
(tcp_server.handle_request
2393
(*args[2:], **kwargs) or True))
2394
719
while clients:
720
client = clients.pop()
721
client.stop_hook = None
722
client.stop()
723
724
atexit.register(cleanup)
725
726
if not debug:
727
signal.signal(signal.SIGINT, signal.SIG_IGN)
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
730
731
for client in clients:
732
client.start()
733
734
tcp_server = IPv6_TCPServer((options.address, options.port),
735
tcp_handler,
736
options=options,
737
clients=clients)
738
# Find out what random port we got
739
global servicePort
740
servicePort = tcp_server.socket.getsockname()[1]
741
logger.debug(u"Now listening on port %d", servicePort)
742
743
if options.interface is not None:
744
global serviceInterface
745
serviceInterface = if_nametoindex(options.interface)
746
747
# From the Avahi example code
748
server.connect_to_signal("StateChanged", server_state_changed)
749
try:
750
server_state_changed(server.GetState())
751
except dbus.exceptions.DBusException, error:
752
logger.critical(u"DBusException: %s", error)
753
killme(1)
754
# End of Avahi example code
755
756
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
757
lambda *args, **kwargs:
758
tcp_server.handle_request(*args[2:],
759
**kwargs) or True)
760
try:
2395
761
logger.debug("Starting main loop")
762
main_loop_started = True
2396
763
main_loop.run()
2397
except AvahiError as error:
2398
logger.critical("AvahiError: %s", error)
2399
cleanup()
2400
sys.exit(1)
2401
764
except KeyboardInterrupt:
2402
765
if debug:
2403
print("", file=sys.stderr)
2404
logger.debug("Server received KeyboardInterrupt")
2405
logger.debug("Server exiting")
2406
# Must run before the D-Bus bus name gets deregistered
2407
cleanup()
2408
766
print
767
768
sys.exit(exitstatus)
2409
769
2410
770
if __name__ == '__main__':
2411
771
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0