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- Committer: Teddy Hogeborn
- Date: 2008-08-01 20:03:03 UTC
- Revision ID: teddy@fukt.bsnet.se-20080801200303-3xjn9gjewg87365i
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
FD_CLOEXEC on the directory, if possible,
and also on both ends of the pipe. Do not
allocate buffer for process in advance.
Free the plugin list. Bug fix: exit if no
plugins found, not if any found. Set
"exitstatus" in many places. Simplify and
un-indent the loop reading process pipes.
Renamed process list iterator to "proc".
Bug fix: retry password write on EINTR.
Free the process list properly, including
the process structs themselves.
FD_CLOEXEC on the directory, if possible,
and also on both ends of the pipe. Do not
allocate buffer for process in advance.
Free the plugin list. Bug fix: exit if no
plugins found, not if any found. Set
"exitstatus" in many places. Simplify and
un-indent the loop reading process pipes.
Renamed process list iterator to "proc".
Bug fix: retry password write on EINTR.
Free the process list properly, including
the process structs themselves.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# following functions: "AvahiService.add", "AvahiService.remove",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
import SocketServer as socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
38
35
import socket
39
import argparse
36
import select
37
from optparse import OptionParser
40
38
import datetime
41
39
import errno
42
40
import gnutls.crypto
45
43
import gnutls.library.functions
46
44
import gnutls.library.constants
47
45
import gnutls.library.types
48
import ConfigParser as configparser
46
import ConfigParser
49
47
import sys
50
48
import re
51
49
import os
52
50
import signal
51
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
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
57
68
58
import dbus
69
import dbus.service
70
59
import gobject
71
60
import avahi
72
61
from dbus.mainloop.glib import DBusGMainLoop
73
62
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
stored_state_path = "/var/lib/mandos/clients.pickle"
90
91
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
def initlogger(level=logging.WARNING):
97
"""init logger and add loglevel"""
98
99
syslogger.setFormatter(logging.Formatter
100
('Mandos [%(process)d]: %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(syslogger)
103
104
console = logging.StreamHandler()
105
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
106
' [%(process)d]:'
107
' %(levelname)s:'
108
' %(message)s'))
109
logger.addHandler(console)
110
logger.setLevel(level)
63
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
68
# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
70
# supply an OpenPGP certificate, and the fingerprint of this
71
# certificate is used by this server to look up (in a list read from a
72
# file at start time) which binary blob to give the client. No other
73
# authentication or authorization is done by this server.
74
75
76
logger = logging.Logger('mandos')
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
81
logger.addHandler(syslogger)
82
del syslogger
111
83
112
84
113
85
class AvahiError(Exception):
114
def __init__(self, value, *args, **kwargs):
86
def __init__(self, value):
115
87
self.value = value
116
super(AvahiError, self).__init__(value, *args, **kwargs)
117
def __unicode__(self):
118
return unicode(repr(self.value))
88
def __str__(self):
89
return repr(self.value)
119
90
120
91
class AvahiServiceError(AvahiError):
121
92
pass
125
96
126
97
127
98
class AvahiService(object):
128
"""An Avahi (Zeroconf) service.
129
130
Attributes:
99
"""
131
100
interface: integer; avahi.IF_UNSPEC or an interface index.
132
101
Used to optionally bind to the specified interface.
133
name: string; Example: 'Mandos'
134
type: string; Example: '_mandos._tcp'.
135
See <http://www.dns-sd.org/ServiceTypes.html>
136
port: integer; what port to announce
137
TXT: list of strings; TXT record for the service
138
domain: string; Domain to publish on, default to .local if empty.
139
host: string; Host to publish records for, default is localhost
140
max_renames: integer; maximum number of renames
141
rename_count: integer; counter so we only rename after collisions
142
a sensible number of times
143
group: D-Bus Entry Group
144
server: D-Bus Server
145
bus: dbus.SystemBus()
102
name = string; Example: "Mandos"
103
type = string; Example: "_mandos._tcp".
104
See <http://www.dns-sd.org/ServiceTypes.html>
105
port = integer; what port to announce
106
TXT = list of strings; TXT record for the service
107
domain = string; Domain to publish on, default to .local if empty.
108
host = string; Host to publish records for, default to localhost
109
if empty.
110
max_renames = integer; maximum number of renames
111
rename_count = integer; counter so we only rename after collisions
112
a sensible number of times
146
113
"""
147
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
148
servicetype = None, port = None, TXT = None,
149
domain = "", host = "", max_renames = 32768,
150
protocol = avahi.PROTO_UNSPEC, bus = None):
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
117
"""An Avahi (Zeroconf) service. """
151
118
self.interface = interface
152
119
self.name = name
153
self.type = servicetype
120
self.type = type
154
121
self.port = port
155
self.TXT = TXT if TXT is not None else []
122
if TXT is None:
123
self.TXT = []
124
else:
125
self.TXT = TXT
156
126
self.domain = domain
157
127
self.host = host
158
128
self.rename_count = 0
159
self.max_renames = max_renames
160
self.protocol = protocol
161
self.group = None # our entry group
162
self.server = None
163
self.bus = bus
164
self.entry_group_state_changed_match = None
165
129
def rename(self):
166
130
"""Derived from the Avahi example code"""
167
131
if self.rename_count >= self.max_renames:
168
logger.critical("No suitable Zeroconf service name found"
169
" after %i retries, exiting.",
170
self.rename_count)
132
logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
171
134
raise AvahiServiceError("Too many renames")
172
self.name = unicode(self.server
173
.GetAlternativeServiceName(self.name))
174
logger.info("Changing Zeroconf service name to %r ...",
175
self.name)
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", name)
176
137
self.remove()
177
try:
178
self.add()
179
except dbus.exceptions.DBusException as error:
180
logger.critical("DBusException: %s", error)
181
self.cleanup()
182
os._exit(1)
138
self.add()
183
139
self.rename_count += 1
184
140
def remove(self):
185
141
"""Derived from the Avahi example code"""
186
if self.entry_group_state_changed_match is not None:
187
self.entry_group_state_changed_match.remove()
188
self.entry_group_state_changed_match = None
189
if self.group is not None:
190
self.group.Reset()
142
if group is not None:
143
group.Reset()
191
144
def add(self):
192
145
"""Derived from the Avahi example code"""
193
self.remove()
194
if self.group is None:
195
self.group = dbus.Interface(
196
self.bus.get_object(avahi.DBUS_NAME,
197
self.server.EntryGroupNew()),
198
avahi.DBUS_INTERFACE_ENTRY_GROUP)
199
self.entry_group_state_changed_match = (
200
self.group.connect_to_signal(
201
'StateChanged', self.entry_group_state_changed))
202
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
203
self.name, self.type)
204
self.group.AddService(
205
self.interface,
206
self.protocol,
207
dbus.UInt32(0), # flags
208
self.name, self.type,
209
self.domain, self.host,
210
dbus.UInt16(self.port),
211
avahi.string_array_to_txt_array(self.TXT))
212
self.group.Commit()
213
def entry_group_state_changed(self, state, error):
214
"""Derived from the Avahi example code"""
215
logger.debug("Avahi entry group state change: %i", state)
216
217
if state == avahi.ENTRY_GROUP_ESTABLISHED:
218
logger.debug("Zeroconf service established.")
219
elif state == avahi.ENTRY_GROUP_COLLISION:
220
logger.info("Zeroconf service name collision.")
221
self.rename()
222
elif state == avahi.ENTRY_GROUP_FAILURE:
223
logger.critical("Avahi: Error in group state changed %s",
224
unicode(error))
225
raise AvahiGroupError("State changed: %s"
226
% unicode(error))
227
def cleanup(self):
228
"""Derived from the Avahi example code"""
229
if self.group is not None:
230
try:
231
self.group.Free()
232
except (dbus.exceptions.UnknownMethodException,
233
dbus.exceptions.DBusException) as e:
234
pass
235
self.group = None
236
self.remove()
237
def server_state_changed(self, state, error=None):
238
"""Derived from the Avahi example code"""
239
logger.debug("Avahi server state change: %i", state)
240
bad_states = { avahi.SERVER_INVALID:
241
"Zeroconf server invalid",
242
avahi.SERVER_REGISTERING: None,
243
avahi.SERVER_COLLISION:
244
"Zeroconf server name collision",
245
avahi.SERVER_FAILURE:
246
"Zeroconf server failure" }
247
if state in bad_states:
248
if bad_states[state] is not None:
249
if error is None:
250
logger.error(bad_states[state])
251
else:
252
logger.error(bad_states[state] + ": %r", error)
253
self.cleanup()
254
elif state == avahi.SERVER_RUNNING:
255
self.add()
256
else:
257
if error is None:
258
logger.debug("Unknown state: %r", state)
259
else:
260
logger.debug("Unknown state: %r: %r", state, error)
261
def activate(self):
262
"""Derived from the Avahi example code"""
263
if self.server is None:
264
self.server = dbus.Interface(
265
self.bus.get_object(avahi.DBUS_NAME,
266
avahi.DBUS_PATH_SERVER,
267
follow_name_owner_changes=True),
268
avahi.DBUS_INTERFACE_SERVER)
269
self.server.connect_to_signal("StateChanged",
270
self.server_state_changed)
271
self.server_state_changed(self.server.GetState())
272
273
class AvahiServiceToSyslog(AvahiService):
274
def rename(self):
275
"""Add the new name to the syslog messages"""
276
ret = AvahiService.rename(self)
277
syslogger.setFormatter(logging.Formatter
278
('Mandos (%s) [%%(process)d]:'
279
' %%(levelname)s: %%(message)s'
280
% self.name))
281
return ret
282
283
def _timedelta_to_milliseconds(td):
284
"Convert a datetime.timedelta() to milliseconds"
285
return ((td.days * 24 * 60 * 60 * 1000)
286
+ (td.seconds * 1000)
287
+ (td.microseconds // 1000))
288
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
169
170
289
171
class Client(object):
290
172
"""A representation of a client host served by this server.
291
292
173
Attributes:
293
_approved: bool(); 'None' if not yet approved/disapproved
294
approval_delay: datetime.timedelta(); Time to wait for approval
295
approval_duration: datetime.timedelta(); Duration of one approval
296
checker: subprocess.Popen(); a running checker process used
297
to see if the client lives.
298
'None' if no process is running.
299
checker_callback_tag: a gobject event source tag, or None
300
checker_command: string; External command which is run to check
301
if client lives. %() expansions are done at
174
name: string; from the config file, used in log messages
175
fingerprint: string (40 or 32 hexadecimal digits); used to
176
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
fqdn: string (FQDN); available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
190
checker_callback_tag: - '' -
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
302
193
runtime with vars(self) as dict, so that for
303
194
instance %(name)s can be used in the command.
304
checker_initiator_tag: a gobject event source tag, or None
305
created: datetime.datetime(); (UTC) object creation
306
client_structure: Object describing what attributes a client has
307
and is used for storing the client at exit
308
current_checker_command: string; current running checker_command
309
disable_initiator_tag: a gobject event source tag, or None
310
enabled: bool()
311
fingerprint: string (40 or 32 hexadecimal digits); used to
312
uniquely identify the client
313
host: string; available for use by the checker command
314
interval: datetime.timedelta(); How often to start a new checker
315
last_approval_request: datetime.datetime(); (UTC) or None
316
last_checked_ok: datetime.datetime(); (UTC) or None
317
last_checker_status: integer between 0 and 255 reflecting exit status
318
of last checker. -1 reflect crashed checker,
319
or None.
320
last_enabled: datetime.datetime(); (UTC)
321
name: string; from the config file, used in log messages and
322
D-Bus identifiers
323
secret: bytestring; sent verbatim (over TLS) to client
324
timeout: datetime.timedelta(); How long from last_checked_ok
325
until this client is disabled
326
extended_timeout: extra long timeout when password has been sent
327
runtime_expansions: Allowed attributes for runtime expansion.
328
expires: datetime.datetime(); time (UTC) when a client will be
329
disabled, or None
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
330
200
"""
331
332
runtime_expansions = ("approval_delay", "approval_duration",
333
"created", "enabled", "fingerprint",
334
"host", "interval", "last_checked_ok",
335
"last_enabled", "name", "timeout")
336
337
def timeout_milliseconds(self):
338
"Return the 'timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.timeout)
340
341
def extended_timeout_milliseconds(self):
342
"Return the 'extended_timeout' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.extended_timeout)
344
345
def interval_milliseconds(self):
346
"Return the 'interval' attribute in milliseconds"
347
return _timedelta_to_milliseconds(self.interval)
348
349
def approval_delay_milliseconds(self):
350
return _timedelta_to_milliseconds(self.approval_delay)
351
352
def __init__(self, name = None, config=None):
353
"""Note: the 'checker' key in 'config' sets the
354
'checker_command' attribute and *not* the 'checker'
355
attribute."""
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
356
229
self.name = name
357
if config is None:
358
config = {}
359
logger.debug("Creating client %r", self.name)
360
# Uppercase and remove spaces from fingerprint for later
361
# comparison purposes with return value from the fingerprint()
362
# function
363
self.fingerprint = (config["fingerprint"].upper()
364
.replace(" ", ""))
365
logger.debug(" Fingerprint: %s", self.fingerprint)
366
if "secret" in config:
367
self.secret = config["secret"].decode("base64")
368
elif "secfile" in config:
369
with open(os.path.expanduser(os.path.expandvars
370
(config["secfile"])),
371
"rb") as secfile:
372
self.secret = secfile.read()
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint
232
# for later comparison purposes with return value of
233
# the fingerprint() function
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if secret:
237
self.secret = secret.decode(u"base64")
238
elif secfile:
239
sf = open(secfile)
240
self.secret = sf.read()
241
sf.close()
373
242
else:
374
raise TypeError("No secret or secfile for client %s"
243
raise TypeError(u"No secret or secfile for client %s"
375
244
% self.name)
376
self.host = config.get("host", "")
377
self.created = datetime.datetime.utcnow()
378
self.enabled = True
379
self.last_approval_request = None
380
self.last_enabled = datetime.datetime.utcnow()
245
self.fqdn = fqdn
246
self.created = datetime.datetime.now()
381
247
self.last_checked_ok = None
382
self.last_checker_status = None
383
self.timeout = string_to_delta(config["timeout"])
384
self.extended_timeout = string_to_delta(config
385
["extended_timeout"])
386
self.interval = string_to_delta(config["interval"])
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
250
self.stop_hook = stop_hook
387
251
self.checker = None
388
252
self.checker_initiator_tag = None
389
self.disable_initiator_tag = None
390
self.expires = datetime.datetime.utcnow() + self.timeout
253
self.stop_initiator_tag = None
391
254
self.checker_callback_tag = None
392
self.checker_command = config["checker"]
393
self.current_checker_command = None
394
self._approved = None
395
self.approved_by_default = config.get("approved_by_default",
396
True)
397
self.approvals_pending = 0
398
self.approval_delay = string_to_delta(
399
config["approval_delay"])
400
self.approval_duration = string_to_delta(
401
config["approval_duration"])
402
self.changedstate = (multiprocessing_manager
403
.Condition(multiprocessing_manager
404
.Lock()))
405
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
406
self.client_structure.append("client_structure")
407
408
409
for name, t in inspect.getmembers(type(self),
410
lambda obj: isinstance(obj, property)):
411
if not name.startswith("_"):
412
self.client_structure.append(name)
413
414
# Send notice to process children that client state has changed
415
def send_changedstate(self):
416
with self.changedstate:
417
self.changedstate.notify_all()
418
419
def enable(self):
255
self.check_command = checker
256
def start(self):
420
257
"""Start this client's checker and timeout hooks"""
421
if getattr(self, "enabled", False):
422
# Already enabled
423
return
424
self.send_changedstate()
425
self.expires = datetime.datetime.utcnow() + self.timeout
426
self.enabled = True
427
self.last_enabled = datetime.datetime.utcnow()
428
self.init_checker()
429
430
def disable(self, quiet=True):
431
"""Disable this client."""
432
if not getattr(self, "enabled", False):
258
# Schedule a new checker to be started an 'interval' from now,
259
# and every interval from then on.
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
263
# Also start a new checker *right now*.
264
self.start_checker()
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if self.secret:
275
logger.debug(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
433
278
return False
434
if not quiet:
435
self.send_changedstate()
436
if not quiet:
437
logger.info("Disabling client %s", self.name)
438
if getattr(self, "disable_initiator_tag", False):
439
gobject.source_remove(self.disable_initiator_tag)
440
self.disable_initiator_tag = None
441
self.expires = None
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
442
282
if getattr(self, "checker_initiator_tag", False):
443
283
gobject.source_remove(self.checker_initiator_tag)
444
284
self.checker_initiator_tag = None
445
285
self.stop_checker()
446
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
447
288
# Do not run this again if called by a gobject.timeout_add
448
289
return False
449
450
290
def __del__(self):
451
self.disable()
452
453
def init_checker(self):
454
# Schedule a new checker to be started an 'interval' from now,
455
# and every interval from then on.
456
self.checker_initiator_tag = (gobject.timeout_add
457
(self.interval_milliseconds(),
458
self.start_checker))
459
# Schedule a disable() when 'timeout' has passed
460
self.disable_initiator_tag = (gobject.timeout_add
461
(self.timeout_milliseconds(),
462
self.disable))
463
# Also start a new checker *right now*.
464
self.start_checker()
465
466
467
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
468
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
469
296
self.checker_callback_tag = None
470
297
self.checker = None
471
if os.WIFEXITED(condition):
472
self.last_checker_status = os.WEXITSTATUS(condition)
473
if self.last_checker_status == 0:
474
logger.info("Checker for %(name)s succeeded",
475
vars(self))
476
self.checked_ok()
477
else:
478
logger.info("Checker for %(name)s failed",
479
vars(self))
480
else:
481
self.last_checker_status = -1
482
logger.warning("Checker for %(name)s crashed?",
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.debug(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
308
logger.warning(u"Checker for %(name)s crashed?",
483
309
vars(self))
484
485
def checked_ok(self, timeout=None):
486
"""Bump up the timeout for this client.
487
488
This should only be called when the client has been seen,
489
alive and well.
490
"""
491
if timeout is None:
492
timeout = self.timeout
493
self.last_checked_ok = datetime.datetime.utcnow()
494
if self.disable_initiator_tag is not None:
495
gobject.source_remove(self.disable_initiator_tag)
496
if getattr(self, "enabled", False):
497
self.disable_initiator_tag = (gobject.timeout_add
498
(_timedelta_to_milliseconds
499
(timeout), self.disable))
500
self.expires = datetime.datetime.utcnow() + timeout
501
502
def need_approval(self):
503
self.last_approval_request = datetime.datetime.utcnow()
504
310
else:
311
logger.debug(u"Checker for %(name)s failed",
312
vars(self))
505
313
def start_checker(self):
506
314
"""Start a new checker subprocess if one is not running.
507
508
315
If a checker already exists, leave it running and do
509
316
nothing."""
510
317
# The reason for not killing a running checker is that if we
513
320
# client would inevitably timeout, since no checker would get
514
321
# a chance to run to completion. If we instead leave running
515
322
# checkers alone, the checker would have to take more time
516
# than 'timeout' for the client to be disabled, which is as it
517
# should be.
518
519
# If a checker exists, make sure it is not a zombie
520
try:
521
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
522
except (AttributeError, OSError) as error:
523
if (isinstance(error, OSError)
524
and error.errno != errno.ECHILD):
525
raise error
526
else:
527
if pid:
528
logger.warning("Checker was a zombie")
529
gobject.source_remove(self.checker_callback_tag)
530
self.checker_callback(pid, status,
531
self.current_checker_command)
532
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
533
325
if self.checker is None:
534
326
try:
535
# In case checker_command has exactly one % operator
536
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.fqdn
537
329
except TypeError:
538
330
# Escape attributes for the shell
539
escaped_attrs = dict(
540
(attr,
541
re.escape(unicode(str(getattr(self, attr, "")),
542
errors=
543
'replace')))
544
for attr in
545
self.runtime_expansions)
546
331
escaped_attrs = dict((key, re.escape(str(val)))
332
for key, val in
333
vars(self).iteritems())
547
334
try:
548
command = self.checker_command % escaped_attrs
549
except TypeError as error:
550
logger.error('Could not format string "%s":'
551
' %s', self.checker_command, error)
335
command = self.check_command % escaped_attrs
336
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
552
339
return True # Try again later
553
self.current_checker_command = command
554
340
try:
555
logger.info("Starting checker %r for %s",
556
command, self.name)
557
# We don't need to redirect stdout and stderr, since
558
# in normal mode, that is already done by daemon(),
559
# and in debug mode we don't want to. (Stdin is
560
# always replaced by /dev/null.)
341
logger.debug(u"Starting checker %r for %s",
342
command, self.name)
561
343
self.checker = subprocess.Popen(command,
562
344
close_fds=True,
563
345
shell=True, cwd="/")
564
self.checker_callback_tag = (gobject.child_watch_add
565
(self.checker.pid,
566
self.checker_callback,
567
data=command))
568
# The checker may have completed before the gobject
569
# watch was added. Check for this.
570
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
571
if pid:
572
gobject.source_remove(self.checker_callback_tag)
573
self.checker_callback(pid, status, command)
574
except OSError as error:
575
logger.error("Failed to start subprocess: %s",
346
self.checker_callback_tag = gobject.child_watch_add\
347
(self.checker.pid,
348
self.checker_callback)
349
except subprocess.OSError, error:
350
logger.error(u"Failed to start subprocess: %s",
576
351
error)
577
352
# Re-run this periodically if run by gobject.timeout_add
578
353
return True
579
580
354
def stop_checker(self):
581
355
"""Force the checker process, if any, to stop."""
582
356
if self.checker_callback_tag:
587
361
logger.debug("Stopping checker for %(name)s", vars(self))
588
362
try:
589
363
os.kill(self.checker.pid, signal.SIGTERM)
590
#time.sleep(0.5)
364
#os.sleep(0.5)
591
365
#if self.checker.poll() is None:
592
366
# os.kill(self.checker.pid, signal.SIGKILL)
593
except OSError as error:
367
except OSError, error:
594
368
if error.errno != errno.ESRCH: # No such process
595
369
raise
596
370
self.checker = None
597
598
# Encrypts a client secret and stores it in a varible encrypted_secret
599
def encrypt_secret(self, key):
600
# Encryption-key need to be of a specific size, so we hash inputed key
601
hasheng = hashlib.sha256()
602
hasheng.update(key)
603
encryptionkey = hasheng.digest()
604
605
# Create validation hash so we know at decryption if it was sucessful
606
hasheng = hashlib.sha256()
607
hasheng.update(self.secret)
608
validationhash = hasheng.digest()
609
610
# Encrypt secret
611
iv = os.urandom(Crypto.Cipher.AES.block_size)
612
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
613
Crypto.Cipher.AES.MODE_CFB, iv)
614
ciphertext = ciphereng.encrypt(validationhash+self.secret)
615
self.encrypted_secret = (ciphertext, iv)
616
617
# Decrypt a encrypted client secret
618
def decrypt_secret(self, key):
619
# Decryption-key need to be of a specific size, so we hash inputed key
620
hasheng = hashlib.sha256()
621
hasheng.update(key)
622
encryptionkey = hasheng.digest()
623
624
# Decrypt encrypted secret
625
ciphertext, iv = self.encrypted_secret
626
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
627
Crypto.Cipher.AES.MODE_CFB, iv)
628
plain = ciphereng.decrypt(ciphertext)
629
630
# Validate decrypted secret to know if it was succesful
631
hasheng = hashlib.sha256()
632
validationhash = plain[:hasheng.digest_size]
633
secret = plain[hasheng.digest_size:]
634
hasheng.update(secret)
635
636
# if validation fails, we use key as new secret. Otherwhise, we use
637
# the decrypted secret
638
if hasheng.digest() == validationhash:
639
self.secret = secret
640
else:
641
self.secret = key
642
del self.encrypted_secret
643
644
645
def dbus_service_property(dbus_interface, signature="v",
646
access="readwrite", byte_arrays=False):
647
"""Decorators for marking methods of a DBusObjectWithProperties to
648
become properties on the D-Bus.
649
650
The decorated method will be called with no arguments by "Get"
651
and with one argument by "Set".
652
653
The parameters, where they are supported, are the same as
654
dbus.service.method, except there is only "signature", since the
655
type from Get() and the type sent to Set() is the same.
656
"""
657
# Encoding deeply encoded byte arrays is not supported yet by the
658
# "Set" method, so we fail early here:
659
if byte_arrays and signature != "ay":
660
raise ValueError("Byte arrays not supported for non-'ay'"
661
" signature %r" % signature)
662
def decorator(func):
663
func._dbus_is_property = True
664
func._dbus_interface = dbus_interface
665
func._dbus_signature = signature
666
func._dbus_access = access
667
func._dbus_name = func.__name__
668
if func._dbus_name.endswith("_dbus_property"):
669
func._dbus_name = func._dbus_name[:-14]
670
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
671
return func
672
return decorator
673
674
675
class DBusPropertyException(dbus.exceptions.DBusException):
676
"""A base class for D-Bus property-related exceptions
677
"""
678
def __unicode__(self):
679
return unicode(str(self))
680
681
682
class DBusPropertyAccessException(DBusPropertyException):
683
"""A property's access permissions disallows an operation.
684
"""
685
pass
686
687
688
class DBusPropertyNotFound(DBusPropertyException):
689
"""An attempt was made to access a non-existing property.
690
"""
691
pass
692
693
694
class DBusObjectWithProperties(dbus.service.Object):
695
"""A D-Bus object with properties.
696
697
Classes inheriting from this can use the dbus_service_property
698
decorator to expose methods as D-Bus properties. It exposes the
699
standard Get(), Set(), and GetAll() methods on the D-Bus.
700
"""
701
702
@staticmethod
703
def _is_dbus_property(obj):
704
return getattr(obj, "_dbus_is_property", False)
705
706
def _get_all_dbus_properties(self):
707
"""Returns a generator of (name, attribute) pairs
708
"""
709
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
710
for cls in self.__class__.__mro__
711
for name, prop in
712
inspect.getmembers(cls, self._is_dbus_property))
713
714
def _get_dbus_property(self, interface_name, property_name):
715
"""Returns a bound method if one exists which is a D-Bus
716
property with the specified name and interface.
717
"""
718
for cls in self.__class__.__mro__:
719
for name, value in (inspect.getmembers
720
(cls, self._is_dbus_property)):
721
if (value._dbus_name == property_name
722
and value._dbus_interface == interface_name):
723
return value.__get__(self)
724
725
# No such property
726
raise DBusPropertyNotFound(self.dbus_object_path + ":"
727
+ interface_name + "."
728
+ property_name)
729
730
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
731
out_signature="v")
732
def Get(self, interface_name, property_name):
733
"""Standard D-Bus property Get() method, see D-Bus standard.
734
"""
735
prop = self._get_dbus_property(interface_name, property_name)
736
if prop._dbus_access == "write":
737
raise DBusPropertyAccessException(property_name)
738
value = prop()
739
if not hasattr(value, "variant_level"):
740
return value
741
return type(value)(value, variant_level=value.variant_level+1)
742
743
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
744
def Set(self, interface_name, property_name, value):
745
"""Standard D-Bus property Set() method, see D-Bus standard.
746
"""
747
prop = self._get_dbus_property(interface_name, property_name)
748
if prop._dbus_access == "read":
749
raise DBusPropertyAccessException(property_name)
750
if prop._dbus_get_args_options["byte_arrays"]:
751
# The byte_arrays option is not supported yet on
752
# signatures other than "ay".
753
if prop._dbus_signature != "ay":
754
raise ValueError
755
value = dbus.ByteArray(''.join(unichr(byte)
756
for byte in value))
757
prop(value)
758
759
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
760
out_signature="a{sv}")
761
def GetAll(self, interface_name):
762
"""Standard D-Bus property GetAll() method, see D-Bus
763
standard.
764
765
Note: Will not include properties with access="write".
766
"""
767
all = {}
768
for name, prop in self._get_all_dbus_properties():
769
if (interface_name
770
and interface_name != prop._dbus_interface):
771
# Interface non-empty but did not match
772
continue
773
# Ignore write-only properties
774
if prop._dbus_access == "write":
775
continue
776
value = prop()
777
if not hasattr(value, "variant_level"):
778
all[name] = value
779
continue
780
all[name] = type(value)(value, variant_level=
781
value.variant_level+1)
782
return dbus.Dictionary(all, signature="sv")
783
784
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
785
out_signature="s",
786
path_keyword='object_path',
787
connection_keyword='connection')
788
def Introspect(self, object_path, connection):
789
"""Standard D-Bus method, overloaded to insert property tags.
790
"""
791
xmlstring = dbus.service.Object.Introspect(self, object_path,
792
connection)
793
try:
794
document = xml.dom.minidom.parseString(xmlstring)
795
def make_tag(document, name, prop):
796
e = document.createElement("property")
797
e.setAttribute("name", name)
798
e.setAttribute("type", prop._dbus_signature)
799
e.setAttribute("access", prop._dbus_access)
800
return e
801
for if_tag in document.getElementsByTagName("interface"):
802
for tag in (make_tag(document, name, prop)
803
for name, prop
804
in self._get_all_dbus_properties()
805
if prop._dbus_interface
806
== if_tag.getAttribute("name")):
807
if_tag.appendChild(tag)
808
# Add the names to the return values for the
809
# "org.freedesktop.DBus.Properties" methods
810
if (if_tag.getAttribute("name")
811
== "org.freedesktop.DBus.Properties"):
812
for cn in if_tag.getElementsByTagName("method"):
813
if cn.getAttribute("name") == "Get":
814
for arg in cn.getElementsByTagName("arg"):
815
if (arg.getAttribute("direction")
816
== "out"):
817
arg.setAttribute("name", "value")
818
elif cn.getAttribute("name") == "GetAll":
819
for arg in cn.getElementsByTagName("arg"):
820
if (arg.getAttribute("direction")
821
== "out"):
822
arg.setAttribute("name", "props")
823
xmlstring = document.toxml("utf-8")
824
document.unlink()
825
except (AttributeError, xml.dom.DOMException,
826
xml.parsers.expat.ExpatError) as error:
827
logger.error("Failed to override Introspection method",
828
error)
829
return xmlstring
830
831
832
def datetime_to_dbus (dt, variant_level=0):
833
"""Convert a UTC datetime.datetime() to a D-Bus type."""
834
if dt is None:
835
return dbus.String("", variant_level = variant_level)
836
return dbus.String(dt.isoformat(),
837
variant_level=variant_level)
838
839
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
840
.__metaclass__):
841
"""Applied to an empty subclass of a D-Bus object, this metaclass
842
will add additional D-Bus attributes matching a certain pattern.
843
"""
844
def __new__(mcs, name, bases, attr):
845
# Go through all the base classes which could have D-Bus
846
# methods, signals, or properties in them
847
for base in (b for b in bases
848
if issubclass(b, dbus.service.Object)):
849
# Go though all attributes of the base class
850
for attrname, attribute in inspect.getmembers(base):
851
# Ignore non-D-Bus attributes, and D-Bus attributes
852
# with the wrong interface name
853
if (not hasattr(attribute, "_dbus_interface")
854
or not attribute._dbus_interface
855
.startswith("se.recompile.Mandos")):
856
continue
857
# Create an alternate D-Bus interface name based on
858
# the current name
859
alt_interface = (attribute._dbus_interface
860
.replace("se.recompile.Mandos",
861
"se.bsnet.fukt.Mandos"))
862
# Is this a D-Bus signal?
863
if getattr(attribute, "_dbus_is_signal", False):
864
# Extract the original non-method function by
865
# black magic
866
nonmethod_func = (dict(
867
zip(attribute.func_code.co_freevars,
868
attribute.__closure__))["func"]
869
.cell_contents)
870
# Create a new, but exactly alike, function
871
# object, and decorate it to be a new D-Bus signal
872
# with the alternate D-Bus interface name
873
new_function = (dbus.service.signal
874
(alt_interface,
875
attribute._dbus_signature)
876
(types.FunctionType(
877
nonmethod_func.func_code,
878
nonmethod_func.func_globals,
879
nonmethod_func.func_name,
880
nonmethod_func.func_defaults,
881
nonmethod_func.func_closure)))
882
# Define a creator of a function to call both the
883
# old and new functions, so both the old and new
884
# signals gets sent when the function is called
885
def fixscope(func1, func2):
886
"""This function is a scope container to pass
887
func1 and func2 to the "call_both" function
888
outside of its arguments"""
889
def call_both(*args, **kwargs):
890
"""This function will emit two D-Bus
891
signals by calling func1 and func2"""
892
func1(*args, **kwargs)
893
func2(*args, **kwargs)
894
return call_both
895
# Create the "call_both" function and add it to
896
# the class
897
attr[attrname] = fixscope(attribute,
898
new_function)
899
# Is this a D-Bus method?
900
elif getattr(attribute, "_dbus_is_method", False):
901
# Create a new, but exactly alike, function
902
# object. Decorate it to be a new D-Bus method
903
# with the alternate D-Bus interface name. Add it
904
# to the class.
905
attr[attrname] = (dbus.service.method
906
(alt_interface,
907
attribute._dbus_in_signature,
908
attribute._dbus_out_signature)
909
(types.FunctionType
910
(attribute.func_code,
911
attribute.func_globals,
912
attribute.func_name,
913
attribute.func_defaults,
914
attribute.func_closure)))
915
# Is this a D-Bus property?
916
elif getattr(attribute, "_dbus_is_property", False):
917
# Create a new, but exactly alike, function
918
# object, and decorate it to be a new D-Bus
919
# property with the alternate D-Bus interface
920
# name. Add it to the class.
921
attr[attrname] = (dbus_service_property
922
(alt_interface,
923
attribute._dbus_signature,
924
attribute._dbus_access,
925
attribute
926
._dbus_get_args_options
927
["byte_arrays"])
928
(types.FunctionType
929
(attribute.func_code,
930
attribute.func_globals,
931
attribute.func_name,
932
attribute.func_defaults,
933
attribute.func_closure)))
934
return type.__new__(mcs, name, bases, attr)
935
936
class ClientDBus(Client, DBusObjectWithProperties):
937
"""A Client class using D-Bus
938
939
Attributes:
940
dbus_object_path: dbus.ObjectPath
941
bus: dbus.SystemBus()
942
"""
943
944
runtime_expansions = (Client.runtime_expansions
945
+ ("dbus_object_path",))
946
947
# dbus.service.Object doesn't use super(), so we can't either.
948
949
def __init__(self, bus = None, *args, **kwargs):
950
self.bus = bus
951
Client.__init__(self, *args, **kwargs)
952
953
self._approvals_pending = 0
954
# Only now, when this client is initialized, can it show up on
955
# the D-Bus
956
client_object_name = unicode(self.name).translate(
957
{ord("."): ord("_"),
958
ord("-"): ord("_")})
959
self.dbus_object_path = (dbus.ObjectPath
960
("/clients/" + client_object_name))
961
DBusObjectWithProperties.__init__(self, self.bus,
962
self.dbus_object_path)
963
964
def notifychangeproperty(transform_func,
965
dbus_name, type_func=lambda x: x,
966
variant_level=1):
967
""" Modify a variable so that it's a property which announces
968
its changes to DBus.
969
970
transform_fun: Function that takes a value and a variant_level
971
and transforms it to a D-Bus type.
972
dbus_name: D-Bus name of the variable
973
type_func: Function that transform the value before sending it
974
to the D-Bus. Default: no transform
975
variant_level: D-Bus variant level. Default: 1
976
"""
977
attrname = "_{0}".format(dbus_name)
978
def setter(self, value):
979
if hasattr(self, "dbus_object_path"):
980
if (not hasattr(self, attrname) or
981
type_func(getattr(self, attrname, None))
982
!= type_func(value)):
983
dbus_value = transform_func(type_func(value),
984
variant_level
985
=variant_level)
986
self.PropertyChanged(dbus.String(dbus_name),
987
dbus_value)
988
setattr(self, attrname, value)
989
990
return property(lambda self: getattr(self, attrname), setter)
991
992
993
expires = notifychangeproperty(datetime_to_dbus, "Expires")
994
approvals_pending = notifychangeproperty(dbus.Boolean,
995
"ApprovalPending",
996
type_func = bool)
997
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
998
last_enabled = notifychangeproperty(datetime_to_dbus,
999
"LastEnabled")
1000
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1001
type_func = lambda checker:
1002
checker is not None)
1003
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1004
"LastCheckedOK")
1005
last_approval_request = notifychangeproperty(
1006
datetime_to_dbus, "LastApprovalRequest")
1007
approved_by_default = notifychangeproperty(dbus.Boolean,
1008
"ApprovedByDefault")
1009
approval_delay = notifychangeproperty(dbus.UInt16,
1010
"ApprovalDelay",
1011
type_func =
1012
_timedelta_to_milliseconds)
1013
approval_duration = notifychangeproperty(
1014
dbus.UInt16, "ApprovalDuration",
1015
type_func = _timedelta_to_milliseconds)
1016
host = notifychangeproperty(dbus.String, "Host")
1017
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1018
type_func =
1019
_timedelta_to_milliseconds)
1020
extended_timeout = notifychangeproperty(
1021
dbus.UInt16, "ExtendedTimeout",
1022
type_func = _timedelta_to_milliseconds)
1023
interval = notifychangeproperty(dbus.UInt16,
1024
"Interval",
1025
type_func =
1026
_timedelta_to_milliseconds)
1027
checker_command = notifychangeproperty(dbus.String, "Checker")
1028
1029
del notifychangeproperty
1030
1031
def __del__(self, *args, **kwargs):
1032
try:
1033
self.remove_from_connection()
1034
except LookupError:
1035
pass
1036
if hasattr(DBusObjectWithProperties, "__del__"):
1037
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1038
Client.__del__(self, *args, **kwargs)
1039
1040
def checker_callback(self, pid, condition, command,
1041
*args, **kwargs):
1042
self.checker_callback_tag = None
1043
self.checker = None
1044
if os.WIFEXITED(condition):
1045
exitstatus = os.WEXITSTATUS(condition)
1046
# Emit D-Bus signal
1047
self.CheckerCompleted(dbus.Int16(exitstatus),
1048
dbus.Int64(condition),
1049
dbus.String(command))
1050
else:
1051
# Emit D-Bus signal
1052
self.CheckerCompleted(dbus.Int16(-1),
1053
dbus.Int64(condition),
1054
dbus.String(command))
1055
1056
return Client.checker_callback(self, pid, condition, command,
1057
*args, **kwargs)
1058
1059
def start_checker(self, *args, **kwargs):
1060
old_checker = self.checker
1061
if self.checker is not None:
1062
old_checker_pid = self.checker.pid
1063
else:
1064
old_checker_pid = None
1065
r = Client.start_checker(self, *args, **kwargs)
1066
# Only if new checker process was started
1067
if (self.checker is not None
1068
and old_checker_pid != self.checker.pid):
1069
# Emit D-Bus signal
1070
self.CheckerStarted(self.current_checker_command)
1071
return r
1072
1073
def _reset_approved(self):
1074
self._approved = None
1075
return False
1076
1077
def approve(self, value=True):
1078
self.send_changedstate()
1079
self._approved = value
1080
gobject.timeout_add(_timedelta_to_milliseconds
1081
(self.approval_duration),
1082
self._reset_approved)
1083
1084
1085
## D-Bus methods, signals & properties
1086
_interface = "se.recompile.Mandos.Client"
1087
1088
## Signals
1089
1090
# CheckerCompleted - signal
1091
@dbus.service.signal(_interface, signature="nxs")
1092
def CheckerCompleted(self, exitcode, waitstatus, command):
1093
"D-Bus signal"
1094
pass
1095
1096
# CheckerStarted - signal
1097
@dbus.service.signal(_interface, signature="s")
1098
def CheckerStarted(self, command):
1099
"D-Bus signal"
1100
pass
1101
1102
# PropertyChanged - signal
1103
@dbus.service.signal(_interface, signature="sv")
1104
def PropertyChanged(self, property, value):
1105
"D-Bus signal"
1106
pass
1107
1108
# GotSecret - signal
1109
@dbus.service.signal(_interface)
1110
def GotSecret(self):
1111
"""D-Bus signal
1112
Is sent after a successful transfer of secret from the Mandos
1113
server to mandos-client
1114
"""
1115
pass
1116
1117
# Rejected - signal
1118
@dbus.service.signal(_interface, signature="s")
1119
def Rejected(self, reason):
1120
"D-Bus signal"
1121
pass
1122
1123
# NeedApproval - signal
1124
@dbus.service.signal(_interface, signature="tb")
1125
def NeedApproval(self, timeout, default):
1126
"D-Bus signal"
1127
return self.need_approval()
1128
1129
# NeRwequest - signal
1130
@dbus.service.signal(_interface, signature="s")
1131
def NewRequest(self, ip):
1132
"""D-Bus signal
1133
Is sent after a client request a password.
1134
"""
1135
pass
1136
1137
## Methods
1138
1139
# Approve - method
1140
@dbus.service.method(_interface, in_signature="b")
1141
def Approve(self, value):
1142
self.approve(value)
1143
1144
# CheckedOK - method
1145
@dbus.service.method(_interface)
1146
def CheckedOK(self):
1147
self.checked_ok()
1148
1149
# Enable - method
1150
@dbus.service.method(_interface)
1151
def Enable(self):
1152
"D-Bus method"
1153
self.enable()
1154
1155
# StartChecker - method
1156
@dbus.service.method(_interface)
1157
def StartChecker(self):
1158
"D-Bus method"
1159
self.start_checker()
1160
1161
# Disable - method
1162
@dbus.service.method(_interface)
1163
def Disable(self):
1164
"D-Bus method"
1165
self.disable()
1166
1167
# StopChecker - method
1168
@dbus.service.method(_interface)
1169
def StopChecker(self):
1170
self.stop_checker()
1171
1172
## Properties
1173
1174
# ApprovalPending - property
1175
@dbus_service_property(_interface, signature="b", access="read")
1176
def ApprovalPending_dbus_property(self):
1177
return dbus.Boolean(bool(self.approvals_pending))
1178
1179
# ApprovedByDefault - property
1180
@dbus_service_property(_interface, signature="b",
1181
access="readwrite")
1182
def ApprovedByDefault_dbus_property(self, value=None):
1183
if value is None: # get
1184
return dbus.Boolean(self.approved_by_default)
1185
self.approved_by_default = bool(value)
1186
1187
# ApprovalDelay - property
1188
@dbus_service_property(_interface, signature="t",
1189
access="readwrite")
1190
def ApprovalDelay_dbus_property(self, value=None):
1191
if value is None: # get
1192
return dbus.UInt64(self.approval_delay_milliseconds())
1193
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1194
1195
# ApprovalDuration - property
1196
@dbus_service_property(_interface, signature="t",
1197
access="readwrite")
1198
def ApprovalDuration_dbus_property(self, value=None):
1199
if value is None: # get
1200
return dbus.UInt64(_timedelta_to_milliseconds(
1201
self.approval_duration))
1202
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1203
1204
# Name - property
1205
@dbus_service_property(_interface, signature="s", access="read")
1206
def Name_dbus_property(self):
1207
return dbus.String(self.name)
1208
1209
# Fingerprint - property
1210
@dbus_service_property(_interface, signature="s", access="read")
1211
def Fingerprint_dbus_property(self):
1212
return dbus.String(self.fingerprint)
1213
1214
# Host - property
1215
@dbus_service_property(_interface, signature="s",
1216
access="readwrite")
1217
def Host_dbus_property(self, value=None):
1218
if value is None: # get
1219
return dbus.String(self.host)
1220
self.host = value
1221
1222
# Created - property
1223
@dbus_service_property(_interface, signature="s", access="read")
1224
def Created_dbus_property(self):
1225
return dbus.String(datetime_to_dbus(self.created))
1226
1227
# LastEnabled - property
1228
@dbus_service_property(_interface, signature="s", access="read")
1229
def LastEnabled_dbus_property(self):
1230
return datetime_to_dbus(self.last_enabled)
1231
1232
# Enabled - property
1233
@dbus_service_property(_interface, signature="b",
1234
access="readwrite")
1235
def Enabled_dbus_property(self, value=None):
1236
if value is None: # get
1237
return dbus.Boolean(self.enabled)
1238
if value:
1239
self.enable()
1240
else:
1241
self.disable()
1242
1243
# LastCheckedOK - property
1244
@dbus_service_property(_interface, signature="s",
1245
access="readwrite")
1246
def LastCheckedOK_dbus_property(self, value=None):
1247
if value is not None:
1248
self.checked_ok()
1249
return
1250
return datetime_to_dbus(self.last_checked_ok)
1251
1252
# Expires - property
1253
@dbus_service_property(_interface, signature="s", access="read")
1254
def Expires_dbus_property(self):
1255
return datetime_to_dbus(self.expires)
1256
1257
# LastApprovalRequest - property
1258
@dbus_service_property(_interface, signature="s", access="read")
1259
def LastApprovalRequest_dbus_property(self):
1260
return datetime_to_dbus(self.last_approval_request)
1261
1262
# Timeout - property
1263
@dbus_service_property(_interface, signature="t",
1264
access="readwrite")
1265
def Timeout_dbus_property(self, value=None):
1266
if value is None: # get
1267
return dbus.UInt64(self.timeout_milliseconds())
1268
self.timeout = datetime.timedelta(0, 0, 0, value)
1269
if getattr(self, "disable_initiator_tag", None) is None:
1270
return
1271
# Reschedule timeout
1272
gobject.source_remove(self.disable_initiator_tag)
1273
self.disable_initiator_tag = None
1274
self.expires = None
1275
time_to_die = _timedelta_to_milliseconds((self
1276
.last_checked_ok
1277
+ self.timeout)
1278
- datetime.datetime
1279
.utcnow())
1280
if time_to_die <= 0:
1281
# The timeout has passed
1282
self.disable()
1283
else:
1284
self.expires = (datetime.datetime.utcnow()
1285
+ datetime.timedelta(milliseconds =
1286
time_to_die))
1287
self.disable_initiator_tag = (gobject.timeout_add
1288
(time_to_die, self.disable))
1289
1290
# ExtendedTimeout - property
1291
@dbus_service_property(_interface, signature="t",
1292
access="readwrite")
1293
def ExtendedTimeout_dbus_property(self, value=None):
1294
if value is None: # get
1295
return dbus.UInt64(self.extended_timeout_milliseconds())
1296
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1297
1298
# Interval - property
1299
@dbus_service_property(_interface, signature="t",
1300
access="readwrite")
1301
def Interval_dbus_property(self, value=None):
1302
if value is None: # get
1303
return dbus.UInt64(self.interval_milliseconds())
1304
self.interval = datetime.timedelta(0, 0, 0, value)
1305
if getattr(self, "checker_initiator_tag", None) is None:
1306
return
1307
# Reschedule checker run
1308
gobject.source_remove(self.checker_initiator_tag)
1309
self.checker_initiator_tag = (gobject.timeout_add
1310
(value, self.start_checker))
1311
self.start_checker() # Start one now, too
1312
1313
# Checker - property
1314
@dbus_service_property(_interface, signature="s",
1315
access="readwrite")
1316
def Checker_dbus_property(self, value=None):
1317
if value is None: # get
1318
return dbus.String(self.checker_command)
1319
self.checker_command = value
1320
1321
# CheckerRunning - property
1322
@dbus_service_property(_interface, signature="b",
1323
access="readwrite")
1324
def CheckerRunning_dbus_property(self, value=None):
1325
if value is None: # get
1326
return dbus.Boolean(self.checker is not None)
1327
if value:
1328
self.start_checker()
1329
else:
1330
self.stop_checker()
1331
1332
# ObjectPath - property
1333
@dbus_service_property(_interface, signature="o", access="read")
1334
def ObjectPath_dbus_property(self):
1335
return self.dbus_object_path # is already a dbus.ObjectPath
1336
1337
# Secret = property
1338
@dbus_service_property(_interface, signature="ay",
1339
access="write", byte_arrays=True)
1340
def Secret_dbus_property(self, value):
1341
self.secret = str(value)
1342
1343
del _interface
1344
1345
1346
class ProxyClient(object):
1347
def __init__(self, child_pipe, fpr, address):
1348
self._pipe = child_pipe
1349
self._pipe.send(('init', fpr, address))
1350
if not self._pipe.recv():
1351
raise KeyError()
1352
1353
def __getattribute__(self, name):
1354
if(name == '_pipe'):
1355
return super(ProxyClient, self).__getattribute__(name)
1356
self._pipe.send(('getattr', name))
1357
data = self._pipe.recv()
1358
if data[0] == 'data':
1359
return data[1]
1360
if data[0] == 'function':
1361
def func(*args, **kwargs):
1362
self._pipe.send(('funcall', name, args, kwargs))
1363
return self._pipe.recv()[1]
1364
return func
1365
1366
def __setattr__(self, name, value):
1367
if(name == '_pipe'):
1368
return super(ProxyClient, self).__setattr__(name, value)
1369
self._pipe.send(('setattr', name, value))
1370
1371
class ClientDBusTransitional(ClientDBus):
1372
__metaclass__ = AlternateDBusNamesMetaclass
1373
1374
class ClientHandler(socketserver.BaseRequestHandler, object):
1375
"""A class to handle client connections.
1376
1377
Instantiated once for each connection to handle it.
371
def still_valid(self):
372
"""Has the timeout not yet passed for this client?"""
373
now = datetime.datetime.now()
374
if self.last_checked_ok is None:
375
return now < (self.created + self.timeout)
376
else:
377
return now < (self.last_checked_ok + self.timeout)
378
379
380
def peer_certificate(session):
381
"Return the peer's OpenPGP certificate as a bytestring"
382
# If not an OpenPGP certificate...
383
if gnutls.library.functions.gnutls_certificate_type_get\
384
(session._c_object) \
385
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
386
# ...do the normal thing
387
return session.peer_certificate
388
list_size = ctypes.c_uint()
389
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
390
(session._c_object, ctypes.byref(list_size))
391
if list_size.value == 0:
392
return None
393
cert = cert_list[0]
394
return ctypes.string_at(cert.data, cert.size)
395
396
397
def fingerprint(openpgp):
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
399
# New empty GnuTLS certificate
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
401
gnutls.library.functions.gnutls_openpgp_crt_init\
402
(ctypes.byref(crt))
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# Import the OpenPGP public key into the certificate
409
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
410
(crt,
411
ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# New buffer for the fingerprint
414
buffer = ctypes.create_string_buffer(20)
415
buffer_length = ctypes.c_size_t()
416
# Get the fingerprint from the certificate into the buffer
417
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
418
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
419
# Deinit the certificate
420
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
421
# Convert the buffer to a Python bytestring
422
fpr = ctypes.string_at(buffer, buffer_length.value)
423
# Convert the bytestring to hexadecimal notation
424
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
425
return hex_fpr
426
427
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
429
"""A TCP request handler class.
430
Instantiated by IPv6_TCPServer for each request to handle it.
1378
431
Note: This will run in its own forked process."""
1379
432
1380
433
def handle(self):
1381
with contextlib.closing(self.server.child_pipe) as child_pipe:
1382
logger.info("TCP connection from: %s",
1383
unicode(self.client_address))
1384
logger.debug("Pipe FD: %d",
1385
self.server.child_pipe.fileno())
1386
1387
session = (gnutls.connection
1388
.ClientSession(self.request,
1389
gnutls.connection
1390
.X509Credentials()))
1391
1392
# Note: gnutls.connection.X509Credentials is really a
1393
# generic GnuTLS certificate credentials object so long as
1394
# no X.509 keys are added to it. Therefore, we can use it
1395
# here despite using OpenPGP certificates.
1396
1397
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1398
# "+AES-256-CBC", "+SHA1",
1399
# "+COMP-NULL", "+CTYPE-OPENPGP",
1400
# "+DHE-DSS"))
1401
# Use a fallback default, since this MUST be set.
1402
priority = self.server.gnutls_priority
1403
if priority is None:
1404
priority = "NORMAL"
1405
(gnutls.library.functions
1406
.gnutls_priority_set_direct(session._c_object,
1407
priority, None))
1408
1409
# Start communication using the Mandos protocol
1410
# Get protocol number
1411
line = self.request.makefile().readline()
1412
logger.debug("Protocol version: %r", line)
1413
try:
1414
if int(line.strip().split()[0]) > 1:
1415
raise RuntimeError
1416
except (ValueError, IndexError, RuntimeError) as error:
1417
logger.error("Unknown protocol version: %s", error)
1418
return
1419
1420
# Start GnuTLS connection
1421
try:
1422
session.handshake()
1423
except gnutls.errors.GNUTLSError as error:
1424
logger.warning("Handshake failed: %s", error)
1425
# Do not run session.bye() here: the session is not
1426
# established. Just abandon the request.
1427
return
1428
logger.debug("Handshake succeeded")
1429
1430
approval_required = False
1431
try:
1432
try:
1433
fpr = self.fingerprint(self.peer_certificate
1434
(session))
1435
except (TypeError,
1436
gnutls.errors.GNUTLSError) as error:
1437
logger.warning("Bad certificate: %s", error)
1438
return
1439
logger.debug("Fingerprint: %s", fpr)
1440
if self.server.use_dbus:
1441
# Emit D-Bus signal
1442
client.NewRequest(str(self.client_address))
1443
1444
try:
1445
client = ProxyClient(child_pipe, fpr,
1446
self.client_address)
1447
except KeyError:
1448
return
1449
1450
if client.approval_delay:
1451
delay = client.approval_delay
1452
client.approvals_pending += 1
1453
approval_required = True
1454
1455
while True:
1456
if not client.enabled:
1457
logger.info("Client %s is disabled",
1458
client.name)
1459
if self.server.use_dbus:
1460
# Emit D-Bus signal
1461
client.Rejected("Disabled")
1462
return
1463
1464
if client._approved or not client.approval_delay:
1465
#We are approved or approval is disabled
1466
break
1467
elif client._approved is None:
1468
logger.info("Client %s needs approval",
1469
client.name)
1470
if self.server.use_dbus:
1471
# Emit D-Bus signal
1472
client.NeedApproval(
1473
client.approval_delay_milliseconds(),
1474
client.approved_by_default)
1475
else:
1476
logger.warning("Client %s was not approved",
1477
client.name)
1478
if self.server.use_dbus:
1479
# Emit D-Bus signal
1480
client.Rejected("Denied")
1481
return
1482
1483
#wait until timeout or approved
1484
time = datetime.datetime.now()
1485
client.changedstate.acquire()
1486
(client.changedstate.wait
1487
(float(client._timedelta_to_milliseconds(delay)
1488
/ 1000)))
1489
client.changedstate.release()
1490
time2 = datetime.datetime.now()
1491
if (time2 - time) >= delay:
1492
if not client.approved_by_default:
1493
logger.warning("Client %s timed out while"
1494
" waiting for approval",
1495
client.name)
1496
if self.server.use_dbus:
1497
# Emit D-Bus signal
1498
client.Rejected("Approval timed out")
1499
return
1500
else:
1501
break
1502
else:
1503
delay -= time2 - time
1504
1505
sent_size = 0
1506
while sent_size < len(client.secret):
1507
try:
1508
sent = session.send(client.secret[sent_size:])
1509
except gnutls.errors.GNUTLSError as error:
1510
logger.warning("gnutls send failed")
1511
return
1512
logger.debug("Sent: %d, remaining: %d",
1513
sent, len(client.secret)
1514
- (sent_size + sent))
1515
sent_size += sent
1516
1517
logger.info("Sending secret to %s", client.name)
1518
# bump the timeout using extended_timeout
1519
client.checked_ok(client.extended_timeout)
1520
if self.server.use_dbus:
1521
# Emit D-Bus signal
1522
client.GotSecret()
1523
1524
finally:
1525
if approval_required:
1526
client.approvals_pending -= 1
1527
try:
1528
session.bye()
1529
except gnutls.errors.GNUTLSError as error:
1530
logger.warning("GnuTLS bye failed")
1531
1532
@staticmethod
1533
def peer_certificate(session):
1534
"Return the peer's OpenPGP certificate as a bytestring"
1535
# If not an OpenPGP certificate...
1536
if (gnutls.library.functions
1537
.gnutls_certificate_type_get(session._c_object)
1538
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1539
# ...do the normal thing
1540
return session.peer_certificate
1541
list_size = ctypes.c_uint(1)
1542
cert_list = (gnutls.library.functions
1543
.gnutls_certificate_get_peers
1544
(session._c_object, ctypes.byref(list_size)))
1545
if not bool(cert_list) and list_size.value != 0:
1546
raise gnutls.errors.GNUTLSError("error getting peer"
1547
" certificate")
1548
if list_size.value == 0:
1549
return None
1550
cert = cert_list[0]
1551
return ctypes.string_at(cert.data, cert.size)
1552
1553
@staticmethod
1554
def fingerprint(openpgp):
1555
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1556
# New GnuTLS "datum" with the OpenPGP public key
1557
datum = (gnutls.library.types
1558
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1559
ctypes.POINTER
1560
(ctypes.c_ubyte)),
1561
ctypes.c_uint(len(openpgp))))
1562
# New empty GnuTLS certificate
1563
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1564
(gnutls.library.functions
1565
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1566
# Import the OpenPGP public key into the certificate
1567
(gnutls.library.functions
1568
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1569
gnutls.library.constants
1570
.GNUTLS_OPENPGP_FMT_RAW))
1571
# Verify the self signature in the key
1572
crtverify = ctypes.c_uint()
1573
(gnutls.library.functions
1574
.gnutls_openpgp_crt_verify_self(crt, 0,
1575
ctypes.byref(crtverify)))
1576
if crtverify.value != 0:
1577
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1578
raise (gnutls.errors.CertificateSecurityError
1579
("Verify failed"))
1580
# New buffer for the fingerprint
1581
buf = ctypes.create_string_buffer(20)
1582
buf_len = ctypes.c_size_t()
1583
# Get the fingerprint from the certificate into the buffer
1584
(gnutls.library.functions
1585
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1586
ctypes.byref(buf_len)))
1587
# Deinit the certificate
1588
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1589
# Convert the buffer to a Python bytestring
1590
fpr = ctypes.string_at(buf, buf_len.value)
1591
# Convert the bytestring to hexadecimal notation
1592
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1593
return hex_fpr
1594
1595
1596
class MultiprocessingMixIn(object):
1597
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1598
def sub_process_main(self, request, address):
1599
try:
1600
self.finish_request(request, address)
1601
except:
1602
self.handle_error(request, address)
1603
self.close_request(request)
1604
1605
def process_request(self, request, address):
1606
"""Start a new process to process the request."""
1607
proc = multiprocessing.Process(target = self.sub_process_main,
1608
args = (request,
1609
address))
1610
proc.start()
1611
return proc
1612
1613
1614
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1615
""" adds a pipe to the MixIn """
1616
def process_request(self, request, client_address):
1617
"""Overrides and wraps the original process_request().
1618
1619
This function creates a new pipe in self.pipe
1620
"""
1621
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1622
1623
proc = MultiprocessingMixIn.process_request(self, request,
1624
client_address)
1625
self.child_pipe.close()
1626
self.add_pipe(parent_pipe, proc)
1627
1628
def add_pipe(self, parent_pipe, proc):
1629
"""Dummy function; override as necessary"""
1630
raise NotImplementedError
1631
1632
1633
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1634
socketserver.TCPServer, object):
1635
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1636
434
logger.debug(u"TCP connection from: %s",
435
unicode(self.client_address))
436
session = gnutls.connection.ClientSession\
437
(self.request, gnutls.connection.X509Credentials())
438
# Note: gnutls.connection.X509Credentials is really a generic
439
# GnuTLS certificate credentials object so long as no X.509
440
# keys are added to it. Therefore, we can use it here despite
441
# using OpenPGP certificates.
442
443
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
444
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
445
# "+DHE-DSS"))
446
priority = "NORMAL" # Fallback default, since this
447
# MUST be set.
448
if self.server.settings["priority"]:
449
priority = self.server.settings["priority"]
450
gnutls.library.functions.gnutls_priority_set_direct\
451
(session._c_object, priority, None);
452
453
try:
454
session.handshake()
455
except gnutls.errors.GNUTLSError, error:
456
logger.debug(u"Handshake failed: %s", error)
457
# Do not run session.bye() here: the session is not
458
# established. Just abandon the request.
459
return
460
try:
461
fpr = fingerprint(peer_certificate(session))
462
except (TypeError, gnutls.errors.GNUTLSError), error:
463
logger.debug(u"Bad certificate: %s", error)
464
session.bye()
465
return
466
logger.debug(u"Fingerprint: %s", fpr)
467
client = None
468
for c in self.server.clients:
469
if c.fingerprint == fpr:
470
client = c
471
break
472
if not client:
473
logger.debug(u"Client not found for fingerprint: %s", fpr)
474
session.bye()
475
return
476
# Have to check if client.still_valid(), since it is possible
477
# that the client timed out while establishing the GnuTLS
478
# session.
479
if not client.still_valid():
480
logger.debug(u"Client %(name)s is invalid", vars(client))
481
session.bye()
482
return
483
sent_size = 0
484
while sent_size < len(client.secret):
485
sent = session.send(client.secret[sent_size:])
486
logger.debug(u"Sent: %d, remaining: %d",
487
sent, len(client.secret)
488
- (sent_size + sent))
489
sent_size += sent
490
session.bye()
491
492
493
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
494
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1637
495
Attributes:
1638
enabled: Boolean; whether this server is activated yet
1639
interface: None or a network interface name (string)
1640
use_ipv6: Boolean; to use IPv6 or not
496
settings: Server settings
497
clients: Set() of Client objects
1641
498
"""
1642
def __init__(self, server_address, RequestHandlerClass,
1643
interface=None, use_ipv6=True):
1644
self.interface = interface
1645
if use_ipv6:
1646
self.address_family = socket.AF_INET6
1647
socketserver.TCPServer.__init__(self, server_address,
1648
RequestHandlerClass)
499
address_family = socket.AF_INET6
500
def __init__(self, *args, **kwargs):
501
if "settings" in kwargs:
502
self.settings = kwargs["settings"]
503
del kwargs["settings"]
504
if "clients" in kwargs:
505
self.clients = kwargs["clients"]
506
del kwargs["clients"]
507
return super(type(self), self).__init__(*args, **kwargs)
1649
508
def server_bind(self):
1650
509
"""This overrides the normal server_bind() function
1651
510
to bind to an interface if one was specified, and also NOT to
1652
511
bind to an address or port if they were not specified."""
1653
if self.interface is not None:
1654
if SO_BINDTODEVICE is None:
1655
logger.error("SO_BINDTODEVICE does not exist;"
1656
" cannot bind to interface %s",
1657
self.interface)
1658
else:
1659
try:
1660
self.socket.setsockopt(socket.SOL_SOCKET,
1661
SO_BINDTODEVICE,
1662
str(self.interface
1663
+ '\0'))
1664
except socket.error as error:
1665
if error[0] == errno.EPERM:
1666
logger.error("No permission to"
1667
" bind to interface %s",
1668
self.interface)
1669
elif error[0] == errno.ENOPROTOOPT:
1670
logger.error("SO_BINDTODEVICE not available;"
1671
" cannot bind to interface %s",
1672
self.interface)
1673
else:
1674
raise
512
if self.settings["interface"]:
513
# 25 is from /usr/include/asm-i486/socket.h
514
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
515
try:
516
self.socket.setsockopt(socket.SOL_SOCKET,
517
SO_BINDTODEVICE,
518
self.settings["interface"])
519
except socket.error, error:
520
if error[0] == errno.EPERM:
521
logger.warning(u"No permission to"
522
u" bind to interface %s",
523
self.settings["interface"])
524
else:
525
raise error
1675
526
# Only bind(2) the socket if we really need to.
1676
527
if self.server_address[0] or self.server_address[1]:
1677
528
if not self.server_address[0]:
1678
if self.address_family == socket.AF_INET6:
1679
any_address = "::" # in6addr_any
1680
else:
1681
any_address = socket.INADDR_ANY
1682
self.server_address = (any_address,
529
in6addr_any = "::"
530
self.server_address = (in6addr_any,
1683
531
self.server_address[1])
1684
elif not self.server_address[1]:
532
elif self.server_address[1] is None:
1685
533
self.server_address = (self.server_address[0],
1686
534
0)
1687
# if self.interface:
1688
# self.server_address = (self.server_address[0],
1689
# 0, # port
1690
# 0, # flowinfo
1691
# if_nametoindex
1692
# (self.interface))
1693
return socketserver.TCPServer.server_bind(self)
1694
1695
1696
class MandosServer(IPv6_TCPServer):
1697
"""Mandos server.
1698
1699
Attributes:
1700
clients: set of Client objects
1701
gnutls_priority GnuTLS priority string
1702
use_dbus: Boolean; to emit D-Bus signals or not
1703
1704
Assumes a gobject.MainLoop event loop.
1705
"""
1706
def __init__(self, server_address, RequestHandlerClass,
1707
interface=None, use_ipv6=True, clients=None,
1708
gnutls_priority=None, use_dbus=True):
1709
self.enabled = False
1710
self.clients = clients
1711
if self.clients is None:
1712
self.clients = {}
1713
self.use_dbus = use_dbus
1714
self.gnutls_priority = gnutls_priority
1715
IPv6_TCPServer.__init__(self, server_address,
1716
RequestHandlerClass,
1717
interface = interface,
1718
use_ipv6 = use_ipv6)
1719
def server_activate(self):
1720
if self.enabled:
1721
return socketserver.TCPServer.server_activate(self)
1722
1723
def enable(self):
1724
self.enabled = True
1725
1726
def add_pipe(self, parent_pipe, proc):
1727
# Call "handle_ipc" for both data and EOF events
1728
gobject.io_add_watch(parent_pipe.fileno(),
1729
gobject.IO_IN | gobject.IO_HUP,
1730
functools.partial(self.handle_ipc,
1731
parent_pipe =
1732
parent_pipe,
1733
proc = proc))
1734
1735
def handle_ipc(self, source, condition, parent_pipe=None,
1736
proc = None, client_object=None):
1737
condition_names = {
1738
gobject.IO_IN: "IN", # There is data to read.
1739
gobject.IO_OUT: "OUT", # Data can be written (without
1740
# blocking).
1741
gobject.IO_PRI: "PRI", # There is urgent data to read.
1742
gobject.IO_ERR: "ERR", # Error condition.
1743
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1744
# broken, usually for pipes and
1745
# sockets).
1746
}
1747
conditions_string = ' | '.join(name
1748
for cond, name in
1749
condition_names.iteritems()
1750
if cond & condition)
1751
# error, or the other end of multiprocessing.Pipe has closed
1752
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1753
# Wait for other process to exit
1754
proc.join()
1755
return False
1756
1757
# Read a request from the child
1758
request = parent_pipe.recv()
1759
command = request[0]
1760
1761
if command == 'init':
1762
fpr = request[1]
1763
address = request[2]
1764
1765
for c in self.clients.itervalues():
1766
if c.fingerprint == fpr:
1767
client = c
1768
break
1769
else:
1770
logger.info("Client not found for fingerprint: %s, ad"
1771
"dress: %s", fpr, address)
1772
if self.use_dbus:
1773
# Emit D-Bus signal
1774
mandos_dbus_service.ClientNotFound(fpr,
1775
address[0])
1776
parent_pipe.send(False)
1777
return False
1778
1779
gobject.io_add_watch(parent_pipe.fileno(),
1780
gobject.IO_IN | gobject.IO_HUP,
1781
functools.partial(self.handle_ipc,
1782
parent_pipe =
1783
parent_pipe,
1784
proc = proc,
1785
client_object =
1786
client))
1787
parent_pipe.send(True)
1788
# remove the old hook in favor of the new above hook on
1789
# same fileno
1790
return False
1791
if command == 'funcall':
1792
funcname = request[1]
1793
args = request[2]
1794
kwargs = request[3]
1795
1796
parent_pipe.send(('data', getattr(client_object,
1797
funcname)(*args,
1798
**kwargs)))
1799
1800
if command == 'getattr':
1801
attrname = request[1]
1802
if callable(client_object.__getattribute__(attrname)):
1803
parent_pipe.send(('function',))
1804
else:
1805
parent_pipe.send(('data', client_object
1806
.__getattribute__(attrname)))
1807
1808
if command == 'setattr':
1809
attrname = request[1]
1810
value = request[2]
1811
setattr(client_object, attrname, value)
1812
1813
return True
535
return super(type(self), self).server_bind()
1814
536
1815
537
1816
538
def string_to_delta(interval):
1817
539
"""Parse a string and return a datetime.timedelta
1818
540
1819
541
>>> string_to_delta('7d')
1820
542
datetime.timedelta(7)
1821
543
>>> string_to_delta('60s')
1824
546
datetime.timedelta(0, 3600)
1825
547
>>> string_to_delta('24h')
1826
548
datetime.timedelta(1)
1827
>>> string_to_delta('1w')
549
>>> string_to_delta(u'1w')
1828
550
datetime.timedelta(7)
1829
>>> string_to_delta('5m 30s')
1830
datetime.timedelta(0, 330)
1831
551
"""
1832
timevalue = datetime.timedelta(0)
1833
for s in interval.split():
1834
try:
1835
suffix = unicode(s[-1])
1836
value = int(s[:-1])
1837
if suffix == "d":
1838
delta = datetime.timedelta(value)
1839
elif suffix == "s":
1840
delta = datetime.timedelta(0, value)
1841
elif suffix == "m":
1842
delta = datetime.timedelta(0, 0, 0, 0, value)
1843
elif suffix == "h":
1844
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1845
elif suffix == "w":
1846
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1847
else:
1848
raise ValueError("Unknown suffix %r" % suffix)
1849
except (ValueError, IndexError) as e:
1850
raise ValueError(*(e.args))
1851
timevalue += delta
1852
return timevalue
1853
1854
1855
def if_nametoindex(interface):
1856
"""Call the C function if_nametoindex(), or equivalent
552
try:
553
suffix=unicode(interval[-1])
554
value=int(interval[:-1])
555
if suffix == u"d":
556
delta = datetime.timedelta(value)
557
elif suffix == u"s":
558
delta = datetime.timedelta(0, value)
559
elif suffix == u"m":
560
delta = datetime.timedelta(0, 0, 0, 0, value)
561
elif suffix == u"h":
562
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
563
elif suffix == u"w":
564
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
565
else:
566
raise ValueError
567
except (ValueError, IndexError):
568
raise ValueError
569
return delta
570
571
572
def server_state_changed(state):
573
"""Derived from the Avahi example code"""
574
if state == avahi.SERVER_COLLISION:
575
logger.warning(u"Server name collision")
576
service.remove()
577
elif state == avahi.SERVER_RUNNING:
578
service.add()
579
580
581
def entry_group_state_changed(state, error):
582
"""Derived from the Avahi example code"""
583
logger.debug(u"state change: %i", state)
1857
584
1858
Note: This function cannot accept a unicode string."""
1859
global if_nametoindex
585
if state == avahi.ENTRY_GROUP_ESTABLISHED:
586
logger.debug(u"Service established.")
587
elif state == avahi.ENTRY_GROUP_COLLISION:
588
logger.warning(u"Service name collision.")
589
service.rename()
590
elif state == avahi.ENTRY_GROUP_FAILURE:
591
logger.critical(u"Error in group state changed %s",
592
unicode(error))
593
raise AvahiGroupError("State changed: %s", str(error))
594
595
def if_nametoindex(interface, _func=[None]):
596
"""Call the C function if_nametoindex(), or equivalent"""
597
if _func[0] is not None:
598
return _func[0](interface)
1860
599
try:
1861
if_nametoindex = (ctypes.cdll.LoadLibrary
1862
(ctypes.util.find_library("c"))
1863
.if_nametoindex)
600
if "ctypes.util" not in sys.modules:
601
import ctypes.util
602
while True:
603
try:
604
libc = ctypes.cdll.LoadLibrary\
605
(ctypes.util.find_library("c"))
606
_func[0] = libc.if_nametoindex
607
return _func[0](interface)
608
except IOError, e:
609
if e != errno.EINTR:
610
raise
1864
611
except (OSError, AttributeError):
1865
logger.warning("Doing if_nametoindex the hard way")
1866
def if_nametoindex(interface):
612
if "struct" not in sys.modules:
613
import struct
614
if "fcntl" not in sys.modules:
615
import fcntl
616
def the_hard_way(interface):
1867
617
"Get an interface index the hard way, i.e. using fcntl()"
1868
618
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1869
with contextlib.closing(socket.socket()) as s:
1870
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1871
struct.pack(str("16s16x"),
1872
interface))
1873
interface_index = struct.unpack(str("I"),
1874
ifreq[16:20])[0]
619
s = socket.socket()
620
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
621
struct.pack("16s16x", interface))
622
s.close()
623
interface_index = struct.unpack("I", ifreq[16:20])[0]
1875
624
return interface_index
1876
return if_nametoindex(interface)
1877
1878
1879
def daemon(nochdir = False, noclose = False):
625
_func[0] = the_hard_way
626
return _func[0](interface)
627
628
629
def daemon(nochdir, noclose):
1880
630
"""See daemon(3). Standard BSD Unix function.
1881
1882
631
This should really exist as os.daemon, but it doesn't (yet)."""
1883
632
if os.fork():
1884
633
sys.exit()
1885
634
os.setsid()
1886
635
if not nochdir:
1887
636
os.chdir("/")
1888
if os.fork():
1889
sys.exit()
1890
637
if not noclose:
1891
638
# Close all standard open file descriptors
1892
639
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1893
640
if not stat.S_ISCHR(os.fstat(null).st_mode):
1894
641
raise OSError(errno.ENODEV,
1895
"%s not a character device"
1896
% os.path.devnull)
642
"/dev/null not a character device")
1897
643
os.dup2(null, sys.stdin.fileno())
1898
644
os.dup2(null, sys.stdout.fileno())
1899
645
os.dup2(null, sys.stderr.fileno())
1902
648
1903
649
1904
650
def main():
1905
1906
##################################################################
1907
# Parsing of options, both command line and config file
1908
1909
parser = argparse.ArgumentParser()
1910
parser.add_argument("-v", "--version", action="version",
1911
version = "%%(prog)s %s" % version,
1912
help="show version number and exit")
1913
parser.add_argument("-i", "--interface", metavar="IF",
1914
help="Bind to interface IF")
1915
parser.add_argument("-a", "--address",
1916
help="Address to listen for requests on")
1917
parser.add_argument("-p", "--port", type=int,
1918
help="Port number to receive requests on")
1919
parser.add_argument("--check", action="store_true",
1920
help="Run self-test")
1921
parser.add_argument("--debug", action="store_true",
1922
help="Debug mode; run in foreground and log"
1923
" to terminal")
1924
parser.add_argument("--debuglevel", metavar="LEVEL",
1925
help="Debug level for stdout output")
1926
parser.add_argument("--priority", help="GnuTLS"
1927
" priority string (see GnuTLS documentation)")
1928
parser.add_argument("--servicename",
1929
metavar="NAME", help="Zeroconf service name")
1930
parser.add_argument("--configdir",
1931
default="/etc/mandos", metavar="DIR",
1932
help="Directory to search for configuration"
1933
" files")
1934
parser.add_argument("--no-dbus", action="store_false",
1935
dest="use_dbus", help="Do not provide D-Bus"
1936
" system bus interface")
1937
parser.add_argument("--no-ipv6", action="store_false",
1938
dest="use_ipv6", help="Do not use IPv6")
1939
parser.add_argument("--no-restore", action="store_false",
1940
dest="restore", help="Do not restore stored state",
1941
default=True)
1942
1943
options = parser.parse_args()
651
global main_loop_started
652
main_loop_started = False
653
654
parser = OptionParser()
655
parser.add_option("-i", "--interface", type="string",
656
metavar="IF", help="Bind to interface IF")
657
parser.add_option("-a", "--address", type="string",
658
help="Address to listen for requests on")
659
parser.add_option("-p", "--port", type="int",
660
help="Port number to receive requests on")
661
parser.add_option("--check", action="store_true", default=False,
662
help="Run self-test")
663
parser.add_option("--debug", action="store_true", default=False,
664
help="Debug mode; run in foreground and log to"
665
" terminal")
666
parser.add_option("--priority", type="string", help="GnuTLS"
667
" priority string (see GnuTLS documentation)")
668
parser.add_option("--servicename", type="string", metavar="NAME",
669
help="Zeroconf service name")
670
parser.add_option("--configdir", type="string",
671
default="/etc/mandos", metavar="DIR",
672
help="Directory to search for configuration"
673
" files")
674
(options, args) = parser.parse_args()
1944
675
1945
676
if options.check:
1946
677
import doctest
1955
686
"priority":
1956
687
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1957
688
"servicename": "Mandos",
1958
"use_dbus": "True",
1959
"use_ipv6": "True",
1960
"debuglevel": "",
1961
689
}
1962
690
1963
691
# Parse config file for server-global settings
1964
server_config = configparser.SafeConfigParser(server_defaults)
692
server_config = ConfigParser.SafeConfigParser(server_defaults)
1965
693
del server_defaults
1966
server_config.read(os.path.join(options.configdir,
1967
"mandos.conf"))
694
server_config.read(os.path.join(options.configdir, "server.conf"))
695
server_section = "server"
1968
696
# Convert the SafeConfigParser object to a dict
1969
server_settings = server_config.defaults()
1970
# Use the appropriate methods on the non-string config options
1971
for option in ("debug", "use_dbus", "use_ipv6"):
1972
server_settings[option] = server_config.getboolean("DEFAULT",
1973
option)
1974
if server_settings["port"]:
1975
server_settings["port"] = server_config.getint("DEFAULT",
1976
"port")
697
server_settings = dict(server_config.items(server_section))
698
# Use getboolean on the boolean config option
699
server_settings["debug"] = server_config.getboolean\
700
(server_section, "debug")
1977
701
del server_config
1978
702
1979
703
# Override the settings from the config file with command line
1980
704
# options, if set.
1981
705
for option in ("interface", "address", "port", "debug",
1982
"priority", "servicename", "configdir",
1983
"use_dbus", "use_ipv6", "debuglevel", "restore"):
706
"priority", "servicename", "configdir"):
1984
707
value = getattr(options, option)
1985
708
if value is not None:
1986
709
server_settings[option] = value
1987
710
del options
1988
# Force all strings to be unicode
1989
for option in server_settings.keys():
1990
if type(server_settings[option]) is str:
1991
server_settings[option] = unicode(server_settings[option])
1992
711
# Now we have our good server settings in "server_settings"
1993
712
1994
##################################################################
1995
1996
# For convenience
1997
debug = server_settings["debug"]
1998
debuglevel = server_settings["debuglevel"]
1999
use_dbus = server_settings["use_dbus"]
2000
use_ipv6 = server_settings["use_ipv6"]
2001
2002
if debug:
2003
initlogger(logging.DEBUG)
2004
else:
2005
if not debuglevel:
2006
initlogger()
2007
else:
2008
level = getattr(logging, debuglevel.upper())
2009
initlogger(level)
2010
2011
if server_settings["servicename"] != "Mandos":
2012
syslogger.setFormatter(logging.Formatter
2013
('Mandos (%s) [%%(process)d]:'
2014
' %%(levelname)s: %%(message)s'
2015
% server_settings["servicename"]))
2016
2017
713
# Parse config file with clients
2018
client_defaults = { "timeout": "5m",
2019
"extended_timeout": "15m",
2020
"interval": "2m",
2021
"checker": "fping -q -- %%(host)s",
2022
"host": "",
2023
"approval_delay": "0s",
2024
"approval_duration": "1s",
714
client_defaults = { "timeout": "1h",
715
"interval": "5m",
716
"checker": "fping -q -- %%(fqdn)s",
2025
717
}
2026
client_config = configparser.SafeConfigParser(client_defaults)
718
client_config = ConfigParser.SafeConfigParser(client_defaults)
2027
719
client_config.read(os.path.join(server_settings["configdir"],
2028
720
"clients.conf"))
2029
721
2030
global mandos_dbus_service
2031
mandos_dbus_service = None
2032
2033
tcp_server = MandosServer((server_settings["address"],
2034
server_settings["port"]),
2035
ClientHandler,
2036
interface=(server_settings["interface"]
2037
or None),
2038
use_ipv6=use_ipv6,
2039
gnutls_priority=
2040
server_settings["priority"],
2041
use_dbus=use_dbus)
2042
if not debug:
2043
pidfilename = "/var/run/mandos.pid"
2044
try:
2045
pidfile = open(pidfilename, "w")
2046
except IOError:
2047
logger.error("Could not open file %r", pidfilename)
2048
2049
try:
2050
uid = pwd.getpwnam("_mandos").pw_uid
2051
gid = pwd.getpwnam("_mandos").pw_gid
2052
except KeyError:
2053
try:
2054
uid = pwd.getpwnam("mandos").pw_uid
2055
gid = pwd.getpwnam("mandos").pw_gid
2056
except KeyError:
2057
try:
2058
uid = pwd.getpwnam("nobody").pw_uid
2059
gid = pwd.getpwnam("nobody").pw_gid
2060
except KeyError:
2061
uid = 65534
2062
gid = 65534
2063
try:
2064
os.setgid(gid)
2065
os.setuid(uid)
2066
except OSError as error:
2067
if error[0] != errno.EPERM:
2068
raise error
2069
2070
if debug:
2071
# Enable all possible GnuTLS debugging
2072
2073
# "Use a log level over 10 to enable all debugging options."
2074
# - GnuTLS manual
2075
gnutls.library.functions.gnutls_global_set_log_level(11)
2076
2077
@gnutls.library.types.gnutls_log_func
2078
def debug_gnutls(level, string):
2079
logger.debug("GnuTLS: %s", string[:-1])
2080
2081
(gnutls.library.functions
2082
.gnutls_global_set_log_function(debug_gnutls))
2083
2084
# Redirect stdin so all checkers get /dev/null
2085
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2086
os.dup2(null, sys.stdin.fileno())
2087
if null > 2:
2088
os.close(null)
2089
else:
2090
# No console logging
2091
logger.removeHandler(console)
2092
2093
# Need to fork before connecting to D-Bus
2094
if not debug:
2095
# Close all input and output, do double fork, etc.
2096
daemon()
722
global service
723
service = AvahiService(name = server_settings["servicename"],
724
type = "_mandos._tcp", );
725
if server_settings["interface"]:
726
service.interface = if_nametoindex(server_settings["interface"])
2097
727
2098
728
global main_loop
729
global bus
730
global server
2099
731
# From the Avahi example code
2100
732
DBusGMainLoop(set_as_default=True )
2101
733
main_loop = gobject.MainLoop()
2102
734
bus = dbus.SystemBus()
735
server = dbus.Interface(
736
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
737
avahi.DBUS_INTERFACE_SERVER )
2103
738
# End of Avahi example code
2104
if use_dbus:
2105
try:
2106
bus_name = dbus.service.BusName("se.recompile.Mandos",
2107
bus, do_not_queue=True)
2108
old_bus_name = (dbus.service.BusName
2109
("se.bsnet.fukt.Mandos", bus,
2110
do_not_queue=True))
2111
except dbus.exceptions.NameExistsException as e:
2112
logger.error(unicode(e) + ", disabling D-Bus")
2113
use_dbus = False
2114
server_settings["use_dbus"] = False
2115
tcp_server.use_dbus = False
2116
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2117
service = AvahiServiceToSyslog(name =
2118
server_settings["servicename"],
2119
servicetype = "_mandos._tcp",
2120
protocol = protocol, bus = bus)
2121
if server_settings["interface"]:
2122
service.interface = (if_nametoindex
2123
(str(server_settings["interface"])))
2124
2125
global multiprocessing_manager
2126
multiprocessing_manager = multiprocessing.Manager()
2127
2128
client_class = Client
2129
if use_dbus:
2130
client_class = functools.partial(ClientDBusTransitional,
2131
bus = bus)
2132
2133
special_settings = {
2134
# Some settings need to be accessd by special methods;
2135
# booleans need .getboolean(), etc. Here is a list of them:
2136
"approved_by_default":
2137
lambda section:
2138
client_config.getboolean(section, "approved_by_default"),
2139
}
2140
# Construct a new dict of client settings of this form:
2141
# { client_name: {setting_name: value, ...}, ...}
2142
# with exceptions for any special settings as defined above
2143
client_settings = dict((clientname,
2144
dict((setting,
2145
(value if setting not in special_settings
2146
else special_settings[setting](clientname)))
2147
for setting, value in client_config.items(clientname)))
2148
for clientname in client_config.sections())
2149
2150
old_client_settings = {}
2151
clients_data = []
2152
2153
# Get client data and settings from last running state.
2154
if server_settings["restore"]:
2155
try:
2156
with open(stored_state_path, "rb") as stored_state:
2157
clients_data, old_client_settings = pickle.load(stored_state)
2158
os.remove(stored_state_path)
2159
except IOError as e:
2160
logger.warning("Could not load persistant state: {0}".format(e))
2161
if e.errno != errno.ENOENT:
2162
raise
2163
2164
for client in clients_data:
2165
client_name = client["name"]
2166
2167
# Decide which value to use after restoring saved state.
2168
# We have three different values: Old config file,
2169
# new config file, and saved state.
2170
# New config value takes precedence if it differs from old
2171
# config value, otherwise use saved state.
2172
for name, value in client_settings[client_name].items():
2173
try:
2174
# For each value in new config, check if it differs
2175
# from the old config value (Except for the "secret"
2176
# attribute)
2177
if name != "secret" and value != old_client_settings[client_name][name]:
2178
setattr(client, name, value)
2179
except KeyError:
2180
pass
2181
2182
# Clients who has passed its expire date, can still be enabled if its
2183
# last checker was sucessful. Clients who checkers failed before we
2184
# stored it state is asumed to had failed checker during downtime.
2185
if client["enabled"] and client["last_checked_ok"]:
2186
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2187
> client["interval"]):
2188
if client["last_checker_status"] != 0:
2189
client["enabled"] = False
2190
else:
2191
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2192
2193
client["changedstate"] = (multiprocessing_manager
2194
.Condition(multiprocessing_manager
2195
.Lock()))
2196
if use_dbus:
2197
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2198
tcp_server.clients[client_name] = new_client
2199
new_client.bus = bus
2200
for name, value in client.iteritems():
2201
setattr(new_client, name, value)
2202
client_object_name = unicode(client_name).translate(
2203
{ord("."): ord("_"),
2204
ord("-"): ord("_")})
2205
new_client.dbus_object_path = (dbus.ObjectPath
2206
("/clients/" + client_object_name))
2207
DBusObjectWithProperties.__init__(new_client,
2208
new_client.bus,
2209
new_client.dbus_object_path)
2210
else:
2211
tcp_server.clients[client_name] = Client.__new__(Client)
2212
for name, value in client.iteritems():
2213
setattr(tcp_server.clients[client_name], name, value)
2214
2215
tcp_server.clients[client_name].decrypt_secret(
2216
client_settings[client_name]["secret"])
2217
2218
# Create/remove clients based on new changes made to config
2219
for clientname in set(old_client_settings) - set(client_settings):
2220
del tcp_server.clients[clientname]
2221
for clientname in set(client_settings) - set(old_client_settings):
2222
tcp_server.clients[clientname] = (client_class(name = clientname,
2223
config =
2224
client_settings
2225
[clientname]))
2226
2227
2228
if not tcp_server.clients:
2229
logger.warning("No clients defined")
2230
2231
if not debug:
2232
try:
2233
with pidfile:
2234
pid = os.getpid()
2235
pidfile.write(str(pid) + "\n".encode("utf-8"))
2236
del pidfile
2237
except IOError:
2238
logger.error("Could not write to file %r with PID %d",
2239
pidfilename, pid)
2240
except NameError:
2241
# "pidfile" was never created
2242
pass
2243
del pidfilename
2244
739
740
debug = server_settings["debug"]
741
742
if debug:
743
console = logging.StreamHandler()
744
# console.setLevel(logging.DEBUG)
745
console.setFormatter(logging.Formatter\
746
('%(levelname)s: %(message)s'))
747
logger.addHandler(console)
748
del console
749
750
clients = Set()
751
def remove_from_clients(client):
752
clients.remove(client)
753
if not clients:
754
logger.debug(u"No clients left, exiting")
755
sys.exit()
756
757
clients.update(Set(Client(name=section,
758
stop_hook = remove_from_clients,
759
**(dict(client_config\
760
.items(section))))
761
for section in client_config.sections()))
762
763
if not debug:
764
daemon(False, False)
765
766
def cleanup():
767
"Cleanup function; run on exit"
768
global group
769
# From the Avahi example code
770
if not group is None:
771
group.Free()
772
group = None
773
# End of Avahi example code
774
775
while clients:
776
client = clients.pop()
777
client.stop_hook = None
778
client.stop()
779
780
atexit.register(cleanup)
781
782
if not debug:
2245
783
signal.signal(signal.SIGINT, signal.SIG_IGN)
2246
2247
784
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2248
785
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2249
786
2250
if use_dbus:
2251
class MandosDBusService(dbus.service.Object):
2252
"""A D-Bus proxy object"""
2253
def __init__(self):
2254
dbus.service.Object.__init__(self, bus, "/")
2255
_interface = "se.recompile.Mandos"
2256
2257
@dbus.service.signal(_interface, signature="o")
2258
def ClientAdded(self, objpath):
2259
"D-Bus signal"
2260
pass
2261
2262
@dbus.service.signal(_interface, signature="ss")
2263
def ClientNotFound(self, fingerprint, address):
2264
"D-Bus signal"
2265
pass
2266
2267
@dbus.service.signal(_interface, signature="os")
2268
def ClientRemoved(self, objpath, name):
2269
"D-Bus signal"
2270
pass
2271
2272
@dbus.service.method(_interface, out_signature="ao")
2273
def GetAllClients(self):
2274
"D-Bus method"
2275
return dbus.Array(c.dbus_object_path
2276
for c in
2277
tcp_server.clients.itervalues())
2278
2279
@dbus.service.method(_interface,
2280
out_signature="a{oa{sv}}")
2281
def GetAllClientsWithProperties(self):
2282
"D-Bus method"
2283
return dbus.Dictionary(
2284
((c.dbus_object_path, c.GetAll(""))
2285
for c in tcp_server.clients.itervalues()),
2286
signature="oa{sv}")
2287
2288
@dbus.service.method(_interface, in_signature="o")
2289
def RemoveClient(self, object_path):
2290
"D-Bus method"
2291
for c in tcp_server.clients.itervalues():
2292
if c.dbus_object_path == object_path:
2293
del tcp_server.clients[c.name]
2294
c.remove_from_connection()
2295
# Don't signal anything except ClientRemoved
2296
c.disable(quiet=True)
2297
# Emit D-Bus signal
2298
self.ClientRemoved(object_path, c.name)
2299
return
2300
raise KeyError(object_path)
2301
2302
del _interface
2303
2304
class MandosDBusServiceTransitional(MandosDBusService):
2305
__metaclass__ = AlternateDBusNamesMetaclass
2306
mandos_dbus_service = MandosDBusServiceTransitional()
2307
2308
def cleanup():
2309
"Cleanup function; run on exit"
2310
service.cleanup()
2311
2312
multiprocessing.active_children()
2313
if not (tcp_server.clients or client_settings):
2314
return
2315
2316
# Store client before exiting. Secrets are encrypted with key based
2317
# on what config file has. If config file is removed/edited, old
2318
# secret will thus be unrecovable.
2319
clients = []
2320
for client in tcp_server.clients.itervalues():
2321
client.encrypt_secret(client_settings[client.name]["secret"])
2322
2323
client_dict = {}
2324
2325
# A list of attributes that will not be stored when shuting down.
2326
exclude = set(("bus", "changedstate", "secret"))
2327
for name, typ in inspect.getmembers(dbus.service.Object):
2328
exclude.add(name)
2329
2330
client_dict["encrypted_secret"] = client.encrypted_secret
2331
for attr in client.client_structure:
2332
if attr not in exclude:
2333
client_dict[attr] = getattr(client, attr)
2334
2335
clients.append(client_dict)
2336
del client_settings[client.name]["secret"]
2337
2338
try:
2339
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2340
pickle.dump((clients, client_settings), stored_state)
2341
except IOError as e:
2342
logger.warning("Could not save persistant state: {0}".format(e))
2343
if e.errno != errno.ENOENT:
2344
raise
2345
2346
# Delete all clients, and settings from config
2347
while tcp_server.clients:
2348
name, client = tcp_server.clients.popitem()
2349
if use_dbus:
2350
client.remove_from_connection()
2351
# Don't signal anything except ClientRemoved
2352
client.disable(quiet=True)
2353
if use_dbus:
2354
# Emit D-Bus signal
2355
mandos_dbus_service.ClientRemoved(client
2356
.dbus_object_path,
2357
client.name)
2358
client_settings.clear()
2359
2360
atexit.register(cleanup)
2361
2362
for client in tcp_server.clients.itervalues():
2363
if use_dbus:
2364
# Emit D-Bus signal
2365
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2366
# Need to initiate checking of clients
2367
if client.enabled:
2368
client.init_checker()
2369
2370
2371
tcp_server.enable()
2372
tcp_server.server_activate()
2373
787
for client in clients:
788
client.start()
789
790
tcp_server = IPv6_TCPServer((server_settings["address"],
791
server_settings["port"]),
792
tcp_handler,
793
settings=server_settings,
794
clients=clients)
2374
795
# Find out what port we got
2375
796
service.port = tcp_server.socket.getsockname()[1]
2376
if use_ipv6:
2377
logger.info("Now listening on address %r, port %d,"
2378
" flowinfo %d, scope_id %d"
2379
% tcp_server.socket.getsockname())
2380
else: # IPv4
2381
logger.info("Now listening on address %r, port %d"
2382
% tcp_server.socket.getsockname())
797
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
798
u" scope_id %d" % tcp_server.socket.getsockname())
2383
799
2384
800
#service.interface = tcp_server.socket.getsockname()[3]
2385
801
2386
802
try:
2387
803
# From the Avahi example code
804
server.connect_to_signal("StateChanged", server_state_changed)
2388
805
try:
2389
service.activate()
2390
except dbus.exceptions.DBusException as error:
2391
logger.critical("DBusException: %s", error)
2392
cleanup()
806
server_state_changed(server.GetState())
807
except dbus.exceptions.DBusException, error:
808
logger.critical(u"DBusException: %s", error)
2393
809
sys.exit(1)
2394
810
# End of Avahi example code
2395
811
2396
812
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2397
813
lambda *args, **kwargs:
2398
(tcp_server.handle_request
2399
(*args[2:], **kwargs) or True))
814
tcp_server.handle_request\
815
(*args[2:], **kwargs) or True)
2400
816
2401
817
logger.debug("Starting main loop")
818
main_loop_started = True
2402
819
main_loop.run()
2403
except AvahiError as error:
2404
logger.critical("AvahiError: %s", error)
2405
cleanup()
820
except AvahiError, error:
821
logger.critical(u"AvahiError: %s" + unicode(error))
2406
822
sys.exit(1)
2407
823
except KeyboardInterrupt:
2408
824
if debug:
2409
print("", file=sys.stderr)
2410
logger.debug("Server received KeyboardInterrupt")
2411
logger.debug("Server exiting")
2412
# Must run before the D-Bus bus name gets deregistered
2413
cleanup()
2414
825
print
2415
826
2416
827
if __name__ == '__main__':
2417
828
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0