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- Committer: Teddy Hogeborn
- Date: 2008-07-20 06:33:48 UTC
- Revision ID: teddy@fukt.bsnet.se-20080720063348-jscgy5p0itrgvlo8
* mandos-clients.conf ([foo]): Uncommented.
([foo]/secret): New.
([foo]/secfile): Commented out.
([foo]/checker): Changed to "fping -q -- %%(fqdn)s".
([foo]/timeout): New.
* server.py: New modeline for Python and Emacs. Set a logging format.
(Client.__init__): Bug fix: Choose either the value from the options
object or pass the argument through string_to_delta
for both "timeout" and "interval".
(Client.checker_callback): Bug fix: Do not log spurious "Checker for
<foo> failed" messages.
(Client.start_checker): Moved "Starting checker" log message down to
just before actually starting the subprocess.
Do not redirect the subprocesses' stdout to a
pipe.
(peer_certificate, fingerprint): Added docstrings.
(entry_group_state_changed): Call "killme()" instead of
"main_loop.quit()".
(daemon, killme): New functions.
(exitstatus, main_loop_started): New global variables.
(__main__): Removed the "--cert", "--key", "--ca", and "--crl"
options. Removed the sleep command from the default
checker. Add a console logger in debug mode. Call
"killme()" instead of "main_loop.quit()" when there are no
more clients. Call "daemon()" if not in debug mode.
Register "cleanup()" to run at exit. Ignore some
signals. Catch DBusException to detect another running
server and exit cleanly. Exit with "exitstatus".
(cleanup): New function.
([foo]/secret): New.
([foo]/secfile): Commented out.
([foo]/checker): Changed to "fping -q -- %%(fqdn)s".
([foo]/timeout): New.
* server.py: New modeline for Python and Emacs. Set a logging format.
(Client.__init__): Bug fix: Choose either the value from the options
object or pass the argument through string_to_delta
for both "timeout" and "interval".
(Client.checker_callback): Bug fix: Do not log spurious "Checker for
<foo> failed" messages.
(Client.start_checker): Moved "Starting checker" log message down to
just before actually starting the subprocess.
Do not redirect the subprocesses' stdout to a
pipe.
(peer_certificate, fingerprint): Added docstrings.
(entry_group_state_changed): Call "killme()" instead of
"main_loop.quit()".
(daemon, killme): New functions.
(exitstatus, main_loop_started): New global variables.
(__main__): Removed the "--cert", "--key", "--ca", and "--crl"
options. Removed the sleep command from the default
checker. Add a console logger in debug mode. Call
"killme()" instead of "main_loop.quit()" when there are no
more clients. Call "daemon()" if not in debug mode.
Register "cleanup()" to run at exit. Ignore some
signals. Catch DBusException to detect another running
server and exit cleanly. Exit with "exitstatus".
(cleanup): New function.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
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".
12
#
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# 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
3
4
from __future__ import division
5
6
import SocketServer
38
7
import socket
39
import argparse
8
import select
9
from optparse import OptionParser
40
10
import datetime
41
11
import errno
42
12
import gnutls.crypto
45
15
import gnutls.library.functions
46
16
import gnutls.library.constants
47
17
import gnutls.library.types
48
import ConfigParser as configparser
18
import ConfigParser
49
19
import sys
50
20
import re
51
21
import os
52
22
import signal
23
from sets import Set
53
24
import subprocess
54
25
import atexit
55
26
import stat
56
import logging
57
import logging.handlers
58
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import hashlib
67
27
68
28
import dbus
69
import dbus.service
70
29
import gobject
71
30
import avahi
72
31
from dbus.mainloop.glib import DBusGMainLoop
73
32
import ctypes
74
import ctypes.util
75
import xml.dom.minidom
76
import inspect
77
import Crypto.Cipher.AES
78
79
try:
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
except AttributeError:
82
try:
83
from IN import SO_BINDTODEVICE
84
except ImportError:
85
SO_BINDTODEVICE = None
86
87
88
version = "1.4.1"
89
90
stored_state_path = "/var/lib/mandos/clients.pickle"
91
92
#logger = logging.getLogger('mandos')
33
34
import logging
35
import logging.handlers
36
93
37
logger = logging.Logger('mandos')
94
syslogger = (logging.handlers.SysLogHandler
95
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
96
address = str("/dev/log")))
97
syslogger.setFormatter(logging.Formatter
98
('Mandos [%(process)d]: %(levelname)s:'
99
' %(message)s'))
38
syslogger = logging.handlers.SysLogHandler\
39
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
40
syslogger.setFormatter(logging.Formatter\
41
('%(levelname)s: %(message)s'))
100
42
logger.addHandler(syslogger)
101
102
console = logging.StreamHandler()
103
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
104
' %(levelname)s:'
105
' %(message)s'))
106
logger.addHandler(console)
107
108
class AvahiError(Exception):
109
def __init__(self, value, *args, **kwargs):
110
self.value = value
111
super(AvahiError, self).__init__(value, *args, **kwargs)
112
def __unicode__(self):
113
return unicode(repr(self.value))
114
115
class AvahiServiceError(AvahiError):
116
pass
117
118
class AvahiGroupError(AvahiError):
119
pass
120
121
122
class AvahiService(object):
123
"""An Avahi (Zeroconf) service.
124
125
Attributes:
126
interface: integer; avahi.IF_UNSPEC or an interface index.
127
Used to optionally bind to the specified interface.
128
name: string; Example: 'Mandos'
129
type: string; Example: '_mandos._tcp'.
130
See <http://www.dns-sd.org/ServiceTypes.html>
131
port: integer; what port to announce
132
TXT: list of strings; TXT record for the service
133
domain: string; Domain to publish on, default to .local if empty.
134
host: string; Host to publish records for, default is localhost
135
max_renames: integer; maximum number of renames
136
rename_count: integer; counter so we only rename after collisions
137
a sensible number of times
138
group: D-Bus Entry Group
139
server: D-Bus Server
140
bus: dbus.SystemBus()
141
"""
142
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
143
servicetype = None, port = None, TXT = None,
144
domain = "", host = "", max_renames = 32768,
145
protocol = avahi.PROTO_UNSPEC, bus = None):
146
self.interface = interface
147
self.name = name
148
self.type = servicetype
149
self.port = port
150
self.TXT = TXT if TXT is not None else []
151
self.domain = domain
152
self.host = host
153
self.rename_count = 0
154
self.max_renames = max_renames
155
self.protocol = protocol
156
self.group = None # our entry group
157
self.server = None
158
self.bus = bus
159
self.entry_group_state_changed_match = None
160
def rename(self):
161
"""Derived from the Avahi example code"""
162
if self.rename_count >= self.max_renames:
163
logger.critical("No suitable Zeroconf service name found"
164
" after %i retries, exiting.",
165
self.rename_count)
166
raise AvahiServiceError("Too many renames")
167
self.name = unicode(self.server
168
.GetAlternativeServiceName(self.name))
169
logger.info("Changing Zeroconf service name to %r ...",
170
self.name)
171
syslogger.setFormatter(logging.Formatter
172
('Mandos (%s) [%%(process)d]:'
173
' %%(levelname)s: %%(message)s'
174
% self.name))
175
self.remove()
176
try:
177
self.add()
178
except dbus.exceptions.DBusException as error:
179
logger.critical("DBusException: %s", error)
180
self.cleanup()
181
os._exit(1)
182
self.rename_count += 1
183
def remove(self):
184
"""Derived from the Avahi example code"""
185
if self.entry_group_state_changed_match is not None:
186
self.entry_group_state_changed_match.remove()
187
self.entry_group_state_changed_match = None
188
if self.group is not None:
189
self.group.Reset()
190
def add(self):
191
"""Derived from the Avahi example code"""
192
self.remove()
193
if self.group is None:
194
self.group = dbus.Interface(
195
self.bus.get_object(avahi.DBUS_NAME,
196
self.server.EntryGroupNew()),
197
avahi.DBUS_INTERFACE_ENTRY_GROUP)
198
self.entry_group_state_changed_match = (
199
self.group.connect_to_signal(
200
'StateChanged', self .entry_group_state_changed))
201
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
202
self.name, self.type)
203
self.group.AddService(
204
self.interface,
205
self.protocol,
206
dbus.UInt32(0), # flags
207
self.name, self.type,
208
self.domain, self.host,
209
dbus.UInt16(self.port),
210
avahi.string_array_to_txt_array(self.TXT))
211
self.group.Commit()
212
def entry_group_state_changed(self, state, error):
213
"""Derived from the Avahi example code"""
214
logger.debug("Avahi entry group state change: %i", state)
215
216
if state == avahi.ENTRY_GROUP_ESTABLISHED:
217
logger.debug("Zeroconf service established.")
218
elif state == avahi.ENTRY_GROUP_COLLISION:
219
logger.info("Zeroconf service name collision.")
220
self.rename()
221
elif state == avahi.ENTRY_GROUP_FAILURE:
222
logger.critical("Avahi: Error in group state changed %s",
223
unicode(error))
224
raise AvahiGroupError("State changed: %s"
225
% unicode(error))
226
def cleanup(self):
227
"""Derived from the Avahi example code"""
228
if self.group is not None:
229
try:
230
self.group.Free()
231
except (dbus.exceptions.UnknownMethodException,
232
dbus.exceptions.DBusException) as e:
233
pass
234
self.group = None
235
self.remove()
236
def server_state_changed(self, state, error=None):
237
"""Derived from the Avahi example code"""
238
logger.debug("Avahi server state change: %i", state)
239
bad_states = { avahi.SERVER_INVALID:
240
"Zeroconf server invalid",
241
avahi.SERVER_REGISTERING: None,
242
avahi.SERVER_COLLISION:
243
"Zeroconf server name collision",
244
avahi.SERVER_FAILURE:
245
"Zeroconf server failure" }
246
if state in bad_states:
247
if bad_states[state] is not None:
248
if error is None:
249
logger.error(bad_states[state])
250
else:
251
logger.error(bad_states[state] + ": %r", error)
252
self.cleanup()
253
elif state == avahi.SERVER_RUNNING:
254
self.add()
255
else:
256
if error is None:
257
logger.debug("Unknown state: %r", state)
258
else:
259
logger.debug("Unknown state: %r: %r", state, error)
260
def activate(self):
261
"""Derived from the Avahi example code"""
262
if self.server is None:
263
self.server = dbus.Interface(
264
self.bus.get_object(avahi.DBUS_NAME,
265
avahi.DBUS_PATH_SERVER,
266
follow_name_owner_changes=True),
267
avahi.DBUS_INTERFACE_SERVER)
268
self.server.connect_to_signal("StateChanged",
269
self.server_state_changed)
270
self.server_state_changed(self.server.GetState())
271
272
273
def _timedelta_to_milliseconds(td):
274
"Convert a datetime.timedelta() to milliseconds"
275
return ((td.days * 24 * 60 * 60 * 1000)
276
+ (td.seconds * 1000)
277
+ (td.microseconds // 1000))
278
43
del syslogger
44
45
# This variable is used to optionally bind to a specified interface.
46
# It is a global variable to fit in with the other variables from the
47
# Avahi server example code.
48
serviceInterface = avahi.IF_UNSPEC
49
# From the Avahi server example code:
50
serviceName = "Mandos"
51
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
52
servicePort = None # Not known at startup
53
serviceTXT = [] # TXT record for the service
54
domain = "" # Domain to publish on, default to .local
55
host = "" # Host to publish records for, default to localhost
56
group = None #our entry group
57
rename_count = 12 # Counter so we only rename after collisions a
58
# sensible number of times
59
# End of Avahi example code
60
61
279
62
class Client(object):
280
63
"""A representation of a client host served by this server.
281
282
64
Attributes:
283
_approved: bool(); 'None' if not yet approved/disapproved
284
approval_delay: datetime.timedelta(); Time to wait for approval
285
approval_duration: datetime.timedelta(); Duration of one approval
286
checker: subprocess.Popen(); a running checker process used
287
to see if the client lives.
288
'None' if no process is running.
289
checker_callback_tag: a gobject event source tag, or None
290
checker_command: string; External command which is run to check
291
if client lives. %() expansions are done at
65
name: string; from the config file, used in log messages
66
fingerprint: string (40 or 32 hexadecimal digits); used to
67
uniquely identify the client
68
secret: bytestring; sent verbatim (over TLS) to client
69
fqdn: string (FQDN); available for use by the checker command
70
created: datetime.datetime()
71
last_seen: datetime.datetime() or None if not yet seen
72
timeout: datetime.timedelta(); How long from last_seen until
73
this client is invalid
74
interval: datetime.timedelta(); How often to start a new checker
75
stop_hook: If set, called by stop() as stop_hook(self)
76
checker: subprocess.Popen(); a running checker process used
77
to see if the client lives.
78
Is None if no process is running.
79
checker_initiator_tag: a gobject event source tag, or None
80
stop_initiator_tag: - '' -
81
checker_callback_tag: - '' -
82
checker_command: string; External command which is run to check if
83
client lives. %()s expansions are done at
292
84
runtime with vars(self) as dict, so that for
293
85
instance %(name)s can be used in the command.
294
checker_initiator_tag: a gobject event source tag, or None
295
created: datetime.datetime(); (UTC) object creation
296
client_structure: Object describing what attributes a client has
297
and is used for storing the client at exit
298
current_checker_command: string; current running checker_command
299
disable_initiator_tag: a gobject event source tag, or None
300
enabled: bool()
301
fingerprint: string (40 or 32 hexadecimal digits); used to
302
uniquely identify the client
303
host: string; available for use by the checker command
304
interval: datetime.timedelta(); How often to start a new checker
305
last_approval_request: datetime.datetime(); (UTC) or None
306
last_checked_ok: datetime.datetime(); (UTC) or None
307
Last_checker_status: integer between 0 and 255 reflecting exit status
308
of last checker. -1 reflect crashed checker.
309
last_enabled: datetime.datetime(); (UTC)
310
name: string; from the config file, used in log messages and
311
D-Bus identifiers
312
secret: bytestring; sent verbatim (over TLS) to client
313
timeout: datetime.timedelta(); How long from last_checked_ok
314
until this client is disabled
315
extended_timeout: extra long timeout when password has been sent
316
runtime_expansions: Allowed attributes for runtime expansion.
317
expires: datetime.datetime(); time (UTC) when a client will be
318
disabled, or None
86
Private attibutes:
87
_timeout: Real variable for 'timeout'
88
_interval: Real variable for 'interval'
89
_timeout_milliseconds: Used by gobject.timeout_add()
90
_interval_milliseconds: - '' -
319
91
"""
320
321
runtime_expansions = ("approval_delay", "approval_duration",
322
"created", "enabled", "fingerprint",
323
"host", "interval", "last_checked_ok",
324
"last_enabled", "name", "timeout")
325
326
def timeout_milliseconds(self):
327
"Return the 'timeout' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.timeout)
329
330
def extended_timeout_milliseconds(self):
331
"Return the 'extended_timeout' attribute in milliseconds"
332
return _timedelta_to_milliseconds(self.extended_timeout)
333
334
def interval_milliseconds(self):
335
"Return the 'interval' attribute in milliseconds"
336
return _timedelta_to_milliseconds(self.interval)
337
338
def approval_delay_milliseconds(self):
339
return _timedelta_to_milliseconds(self.approval_delay)
340
341
def __init__(self, name = None, config=None):
342
"""Note: the 'checker' key in 'config' sets the
343
'checker_command' attribute and *not* the 'checker'
344
attribute."""
92
def _set_timeout(self, timeout):
93
"Setter function for 'timeout' attribute"
94
self._timeout = timeout
95
self._timeout_milliseconds = ((self.timeout.days
96
* 24 * 60 * 60 * 1000)
97
+ (self.timeout.seconds * 1000)
98
+ (self.timeout.microseconds
99
// 1000))
100
timeout = property(lambda self: self._timeout,
101
_set_timeout)
102
del _set_timeout
103
def _set_interval(self, interval):
104
"Setter function for 'interval' attribute"
105
self._interval = interval
106
self._interval_milliseconds = ((self.interval.days
107
* 24 * 60 * 60 * 1000)
108
+ (self.interval.seconds
109
* 1000)
110
+ (self.interval.microseconds
111
// 1000))
112
interval = property(lambda self: self._interval,
113
_set_interval)
114
del _set_interval
115
def __init__(self, name=None, options=None, stop_hook=None,
116
fingerprint=None, secret=None, secfile=None,
117
fqdn=None, timeout=None, interval=-1, checker=None):
345
118
self.name = name
346
if config is None:
347
config = {}
348
logger.debug("Creating client %r", self.name)
349
# Uppercase and remove spaces from fingerprint for later
350
# comparison purposes with return value from the fingerprint()
351
# function
352
self.fingerprint = (config["fingerprint"].upper()
353
.replace(" ", ""))
354
logger.debug(" Fingerprint: %s", self.fingerprint)
355
if "secret" in config:
356
self.secret = config["secret"].decode("base64")
357
elif "secfile" in config:
358
with open(os.path.expanduser(os.path.expandvars
359
(config["secfile"])),
360
"rb") as secfile:
361
self.secret = secfile.read()
362
else:
363
raise TypeError("No secret or secfile for client %s"
364
% self.name)
365
self.host = config.get("host", "")
366
self.created = datetime.datetime.utcnow()
367
self.enabled = True
368
self.last_approval_request = None
369
self.last_enabled = datetime.datetime.utcnow()
370
self.last_checked_ok = None
371
self.last_checker_status = 0
372
self.timeout = string_to_delta(config["timeout"])
373
self.extended_timeout = string_to_delta(config
374
["extended_timeout"])
375
self.interval = string_to_delta(config["interval"])
119
# Uppercase and remove spaces from fingerprint
120
# for later comparison purposes with return value of
121
# the fingerprint() function
122
self.fingerprint = fingerprint.upper().replace(u" ", u"")
123
if secret:
124
self.secret = secret.decode(u"base64")
125
elif secfile:
126
sf = open(secfile)
127
self.secret = sf.read()
128
sf.close()
129
else:
130
raise RuntimeError(u"No secret or secfile for client %s"
131
% self.name)
132
self.fqdn = fqdn # string
133
self.created = datetime.datetime.now()
134
self.last_seen = None
135
if timeout is None:
136
self.timeout = options.timeout
137
else:
138
self.timeout = string_to_delta(timeout)
139
if interval == -1:
140
self.interval = options.interval
141
else:
142
self.interval = string_to_delta(interval)
143
self.stop_hook = stop_hook
376
144
self.checker = None
377
145
self.checker_initiator_tag = None
378
self.disable_initiator_tag = None
379
self.expires = datetime.datetime.utcnow() + self.timeout
146
self.stop_initiator_tag = None
380
147
self.checker_callback_tag = None
381
self.checker_command = config["checker"]
382
self.current_checker_command = None
383
self._approved = None
384
self.approved_by_default = config.get("approved_by_default",
385
True)
386
self.approvals_pending = 0
387
self.approval_delay = string_to_delta(
388
config["approval_delay"])
389
self.approval_duration = string_to_delta(
390
config["approval_duration"])
391
self.changedstate = (multiprocessing_manager
392
.Condition(multiprocessing_manager
393
.Lock()))
394
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
395
self.client_structure.append("client_structure")
396
397
398
for name, t in inspect.getmembers(type(self),
399
lambda obj: isinstance(obj, property)):
400
if not name.startswith("_"):
401
self.client_structure.append(name)
402
403
404
def send_changedstate(self):
405
self.changedstate.acquire()
406
self.changedstate.notify_all()
407
self.changedstate.release()
408
409
def enable(self):
410
"""Start this client's checker and timeout hooks"""
411
if getattr(self, "enabled", False):
412
# Already enabled
413
return
414
self.send_changedstate()
415
self.expires = datetime.datetime.utcnow() + self.timeout
416
self.enabled = True
417
self.last_enabled = datetime.datetime.utcnow()
418
self.init_checker()
419
420
def disable(self, quiet=True):
421
"""Disable this client."""
422
if not getattr(self, "enabled", False):
423
return False
424
if not quiet:
425
self.send_changedstate()
426
if not quiet:
427
logger.info("Disabling client %s", self.name)
428
if getattr(self, "disable_initiator_tag", False):
429
gobject.source_remove(self.disable_initiator_tag)
430
self.disable_initiator_tag = None
431
self.expires = None
432
if getattr(self, "checker_initiator_tag", False):
433
gobject.source_remove(self.checker_initiator_tag)
434
self.checker_initiator_tag = None
435
self.stop_checker()
436
self.enabled = False
437
# Do not run this again if called by a gobject.timeout_add
438
return False
439
440
def __del__(self):
441
self.disable()
442
443
def init_checker(self):
148
self.check_command = checker
149
def start(self):
150
"""Start this clients checker and timeout hooks"""
444
151
# Schedule a new checker to be started an 'interval' from now,
445
152
# and every interval from then on.
446
self.checker_initiator_tag = (gobject.timeout_add
447
(self.interval_milliseconds(),
448
self.start_checker))
449
# Schedule a disable() when 'timeout' has passed
450
self.disable_initiator_tag = (gobject.timeout_add
451
(self.timeout_milliseconds(),
452
self.disable))
153
self.checker_initiator_tag = gobject.timeout_add\
154
(self._interval_milliseconds,
155
self.start_checker)
453
156
# Also start a new checker *right now*.
454
157
self.start_checker()
455
456
457
def checker_callback(self, pid, condition, command):
158
# Schedule a stop() when 'timeout' has passed
159
self.stop_initiator_tag = gobject.timeout_add\
160
(self._timeout_milliseconds,
161
self.stop)
162
def stop(self):
163
"""Stop this client.
164
The possibility that this client might be restarted is left
165
open, but not currently used."""
166
logger.debug(u"Stopping client %s", self.name)
167
self.secret = None
168
if self.stop_initiator_tag:
169
gobject.source_remove(self.stop_initiator_tag)
170
self.stop_initiator_tag = None
171
if self.checker_initiator_tag:
172
gobject.source_remove(self.checker_initiator_tag)
173
self.checker_initiator_tag = None
174
self.stop_checker()
175
if self.stop_hook:
176
self.stop_hook(self)
177
# Do not run this again if called by a gobject.timeout_add
178
return False
179
def __del__(self):
180
# Some code duplication here and in stop()
181
if hasattr(self, "stop_initiator_tag") \
182
and self.stop_initiator_tag:
183
gobject.source_remove(self.stop_initiator_tag)
184
self.stop_initiator_tag = None
185
if hasattr(self, "checker_initiator_tag") \
186
and self.checker_initiator_tag:
187
gobject.source_remove(self.checker_initiator_tag)
188
self.checker_initiator_tag = None
189
self.stop_checker()
190
def checker_callback(self, pid, condition):
458
191
"""The checker has completed, so take appropriate actions."""
459
self.checker_callback_tag = None
460
self.checker = None
461
if os.WIFEXITED(condition):
462
self.last_checker_status = os.WEXITSTATUS(condition)
463
if self.last_checker_status == 0:
464
logger.info("Checker for %(name)s succeeded",
465
vars(self))
466
self.checked_ok()
467
else:
468
logger.info("Checker for %(name)s failed",
469
vars(self))
470
else:
471
self.last_checker_status = -1
472
logger.warning("Checker for %(name)s crashed?",
192
now = datetime.datetime.now()
193
if os.WIFEXITED(condition) \
194
and (os.WEXITSTATUS(condition) == 0):
195
logger.debug(u"Checker for %(name)s succeeded",
196
vars(self))
197
self.last_seen = now
198
gobject.source_remove(self.stop_initiator_tag)
199
self.stop_initiator_tag = gobject.timeout_add\
200
(self._timeout_milliseconds,
201
self.stop)
202
elif not os.WIFEXITED(condition):
203
logger.warning(u"Checker for %(name)s crashed?",
473
204
vars(self))
474
475
def checked_ok(self, timeout=None):
476
"""Bump up the timeout for this client.
477
478
This should only be called when the client has been seen,
479
alive and well.
480
"""
481
if timeout is None:
482
timeout = self.timeout
483
self.last_checked_ok = datetime.datetime.utcnow()
484
if self.disable_initiator_tag is not None:
485
gobject.source_remove(self.disable_initiator_tag)
486
if getattr(self, "enabled", False):
487
self.disable_initiator_tag = (gobject.timeout_add
488
(_timedelta_to_milliseconds
489
(timeout), self.disable))
490
self.expires = datetime.datetime.utcnow() + timeout
491
492
def need_approval(self):
493
self.last_approval_request = datetime.datetime.utcnow()
494
205
else:
206
logger.debug(u"Checker for %(name)s failed",
207
vars(self))
208
self.checker = None
209
self.checker_callback_tag = None
495
210
def start_checker(self):
496
211
"""Start a new checker subprocess if one is not running.
497
498
212
If a checker already exists, leave it running and do
499
213
nothing."""
500
# The reason for not killing a running checker is that if we
501
# did that, then if a checker (for some reason) started
502
# running slowly and taking more than 'interval' time, the
503
# client would inevitably timeout, since no checker would get
504
# a chance to run to completion. If we instead leave running
505
# checkers alone, the checker would have to take more time
506
# than 'timeout' for the client to be disabled, which is as it
507
# should be.
508
509
# If a checker exists, make sure it is not a zombie
510
try:
511
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
512
except (AttributeError, OSError) as error:
513
if (isinstance(error, OSError)
514
and error.errno != errno.ECHILD):
515
raise error
516
else:
517
if pid:
518
logger.warning("Checker was a zombie")
519
gobject.source_remove(self.checker_callback_tag)
520
self.checker_callback(pid, status,
521
self.current_checker_command)
522
# Start a new checker if needed
523
214
if self.checker is None:
524
215
try:
525
# In case checker_command has exactly one % operator
526
command = self.checker_command % self.host
216
command = self.check_command % self.fqdn
527
217
except TypeError:
528
# Escape attributes for the shell
529
escaped_attrs = dict(
530
(attr,
531
re.escape(unicode(str(getattr(self, attr, "")),
532
errors=
533
'replace')))
534
for attr in
535
self.runtime_expansions)
536
218
escaped_attrs = dict((key, re.escape(str(val)))
219
for key, val in
220
vars(self).iteritems())
537
221
try:
538
command = self.checker_command % escaped_attrs
539
except TypeError as error:
540
logger.error('Could not format string "%s":'
541
' %s', self.checker_command, error)
222
command = self.check_command % escaped_attrs
223
except TypeError, error:
224
logger.critical(u'Could not format string "%s":'
225
u' %s', self.check_command, error)
542
226
return True # Try again later
543
self.current_checker_command = command
544
227
try:
545
logger.info("Starting checker %r for %s",
546
command, self.name)
547
# We don't need to redirect stdout and stderr, since
548
# in normal mode, that is already done by daemon(),
549
# and in debug mode we don't want to. (Stdin is
550
# always replaced by /dev/null.)
551
self.checker = subprocess.Popen(command,
552
close_fds=True,
553
shell=True, cwd="/")
554
self.checker_callback_tag = (gobject.child_watch_add
555
(self.checker.pid,
556
self.checker_callback,
557
data=command))
558
# The checker may have completed before the gobject
559
# watch was added. Check for this.
560
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
561
if pid:
562
gobject.source_remove(self.checker_callback_tag)
563
self.checker_callback(pid, status, command)
564
except OSError as error:
565
logger.error("Failed to start subprocess: %s",
228
logger.debug(u"Starting checker %r for %s",
229
command, self.name)
230
self.checker = subprocess.\
231
Popen(command,
232
close_fds=True, shell=True,
233
cwd="/")
234
self.checker_callback_tag = gobject.child_watch_add\
235
(self.checker.pid,
236
self.checker_callback)
237
except subprocess.OSError, error:
238
logger.error(u"Failed to start subprocess: %s",
566
239
error)
567
240
# Re-run this periodically if run by gobject.timeout_add
568
241
return True
569
570
242
def stop_checker(self):
571
243
"""Force the checker process, if any, to stop."""
572
if self.checker_callback_tag:
573
gobject.source_remove(self.checker_callback_tag)
574
self.checker_callback_tag = None
575
if getattr(self, "checker", None) is None:
244
if not hasattr(self, "checker") or self.checker is None:
576
245
return
577
logger.debug("Stopping checker for %(name)s", vars(self))
578
try:
579
os.kill(self.checker.pid, signal.SIGTERM)
580
#time.sleep(0.5)
581
#if self.checker.poll() is None:
582
# os.kill(self.checker.pid, signal.SIGKILL)
583
except OSError as error:
584
if error.errno != errno.ESRCH: # No such process
585
raise
586
self.checker = None
587
588
# Encrypts a client secret and stores it in a varible encrypted_secret
589
def encrypt_secret(self, key):
590
# Encryption-key need to be specific size, so we hash inputed key
591
hasheng = hashlib.sha256()
592
hasheng.update(key)
593
encryptionkey = hasheng.digest()
594
595
# Create validation hash so we know at decryption if it was sucessful
596
hasheng = hashlib.sha256()
597
hasheng.update(self.secret)
598
validationhash = hasheng.digest()
599
600
# Encrypt secret
601
iv = os.urandom(Crypto.Cipher.AES.block_size)
602
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
603
Crypto.Cipher.AES.MODE_CFB, iv)
604
ciphertext = ciphereng.encrypt(validationhash+self.secret)
605
self.encrypted_secret = (ciphertext, iv)
606
607
# Decrypt a encrypted client secret
608
def decrypt_secret(self, key):
609
# Decryption-key need to be specific size, so we hash inputed key
610
hasheng = hashlib.sha256()
611
hasheng.update(key)
612
encryptionkey = hasheng.digest()
613
614
# Decrypt encrypted secret
615
ciphertext, iv = self.encrypted_secret
616
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
617
Crypto.Cipher.AES.MODE_CFB, iv)
618
plain = ciphereng.decrypt(ciphertext)
619
620
# Validate decrypted secret to know if it was succesful
621
hasheng = hashlib.sha256()
622
validationhash = plain[:hasheng.digest_size]
623
secret = plain[hasheng.digest_size:]
624
hasheng.update(secret)
625
626
# if validation fails, we use key as new secret. Otherwhise, we use
627
# the decrypted secret
628
if hasheng.digest() == validationhash:
629
self.secret = secret
630
else:
631
self.secret = key
632
del self.encrypted_secret
633
634
635
def dbus_service_property(dbus_interface, signature="v",
636
access="readwrite", byte_arrays=False):
637
"""Decorators for marking methods of a DBusObjectWithProperties to
638
become properties on the D-Bus.
639
640
The decorated method will be called with no arguments by "Get"
641
and with one argument by "Set".
642
643
The parameters, where they are supported, are the same as
644
dbus.service.method, except there is only "signature", since the
645
type from Get() and the type sent to Set() is the same.
646
"""
647
# Encoding deeply encoded byte arrays is not supported yet by the
648
# "Set" method, so we fail early here:
649
if byte_arrays and signature != "ay":
650
raise ValueError("Byte arrays not supported for non-'ay'"
651
" signature %r" % signature)
652
def decorator(func):
653
func._dbus_is_property = True
654
func._dbus_interface = dbus_interface
655
func._dbus_signature = signature
656
func._dbus_access = access
657
func._dbus_name = func.__name__
658
if func._dbus_name.endswith("_dbus_property"):
659
func._dbus_name = func._dbus_name[:-14]
660
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
661
return func
662
return decorator
663
664
665
class DBusPropertyException(dbus.exceptions.DBusException):
666
"""A base class for D-Bus property-related exceptions
667
"""
668
def __unicode__(self):
669
return unicode(str(self))
670
671
672
class DBusPropertyAccessException(DBusPropertyException):
673
"""A property's access permissions disallows an operation.
674
"""
675
pass
676
677
678
class DBusPropertyNotFound(DBusPropertyException):
679
"""An attempt was made to access a non-existing property.
680
"""
681
pass
682
683
684
class DBusObjectWithProperties(dbus.service.Object):
685
"""A D-Bus object with properties.
686
687
Classes inheriting from this can use the dbus_service_property
688
decorator to expose methods as D-Bus properties. It exposes the
689
standard Get(), Set(), and GetAll() methods on the D-Bus.
690
"""
691
692
@staticmethod
693
def _is_dbus_property(obj):
694
return getattr(obj, "_dbus_is_property", False)
695
696
def _get_all_dbus_properties(self):
697
"""Returns a generator of (name, attribute) pairs
698
"""
699
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
700
for cls in self.__class__.__mro__
701
for name, prop in
702
inspect.getmembers(cls, self._is_dbus_property))
703
704
def _get_dbus_property(self, interface_name, property_name):
705
"""Returns a bound method if one exists which is a D-Bus
706
property with the specified name and interface.
707
"""
708
for cls in self.__class__.__mro__:
709
for name, value in (inspect.getmembers
710
(cls, self._is_dbus_property)):
711
if (value._dbus_name == property_name
712
and value._dbus_interface == interface_name):
713
return value.__get__(self)
714
715
# No such property
716
raise DBusPropertyNotFound(self.dbus_object_path + ":"
717
+ interface_name + "."
718
+ property_name)
719
720
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
721
out_signature="v")
722
def Get(self, interface_name, property_name):
723
"""Standard D-Bus property Get() method, see D-Bus standard.
724
"""
725
prop = self._get_dbus_property(interface_name, property_name)
726
if prop._dbus_access == "write":
727
raise DBusPropertyAccessException(property_name)
728
value = prop()
729
if not hasattr(value, "variant_level"):
730
return value
731
return type(value)(value, variant_level=value.variant_level+1)
732
733
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
734
def Set(self, interface_name, property_name, value):
735
"""Standard D-Bus property Set() method, see D-Bus standard.
736
"""
737
prop = self._get_dbus_property(interface_name, property_name)
738
if prop._dbus_access == "read":
739
raise DBusPropertyAccessException(property_name)
740
if prop._dbus_get_args_options["byte_arrays"]:
741
# The byte_arrays option is not supported yet on
742
# signatures other than "ay".
743
if prop._dbus_signature != "ay":
744
raise ValueError
745
value = dbus.ByteArray(''.join(unichr(byte)
746
for byte in value))
747
prop(value)
748
749
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
750
out_signature="a{sv}")
751
def GetAll(self, interface_name):
752
"""Standard D-Bus property GetAll() method, see D-Bus
753
standard.
754
755
Note: Will not include properties with access="write".
756
"""
757
all = {}
758
for name, prop in self._get_all_dbus_properties():
759
if (interface_name
760
and interface_name != prop._dbus_interface):
761
# Interface non-empty but did not match
762
continue
763
# Ignore write-only properties
764
if prop._dbus_access == "write":
765
continue
766
value = prop()
767
if not hasattr(value, "variant_level"):
768
all[name] = value
769
continue
770
all[name] = type(value)(value, variant_level=
771
value.variant_level+1)
772
return dbus.Dictionary(all, signature="sv")
773
774
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
775
out_signature="s",
776
path_keyword='object_path',
777
connection_keyword='connection')
778
def Introspect(self, object_path, connection):
779
"""Standard D-Bus method, overloaded to insert property tags.
780
"""
781
xmlstring = dbus.service.Object.Introspect(self, object_path,
782
connection)
783
try:
784
document = xml.dom.minidom.parseString(xmlstring)
785
def make_tag(document, name, prop):
786
e = document.createElement("property")
787
e.setAttribute("name", name)
788
e.setAttribute("type", prop._dbus_signature)
789
e.setAttribute("access", prop._dbus_access)
790
return e
791
for if_tag in document.getElementsByTagName("interface"):
792
for tag in (make_tag(document, name, prop)
793
for name, prop
794
in self._get_all_dbus_properties()
795
if prop._dbus_interface
796
== if_tag.getAttribute("name")):
797
if_tag.appendChild(tag)
798
# Add the names to the return values for the
799
# "org.freedesktop.DBus.Properties" methods
800
if (if_tag.getAttribute("name")
801
== "org.freedesktop.DBus.Properties"):
802
for cn in if_tag.getElementsByTagName("method"):
803
if cn.getAttribute("name") == "Get":
804
for arg in cn.getElementsByTagName("arg"):
805
if (arg.getAttribute("direction")
806
== "out"):
807
arg.setAttribute("name", "value")
808
elif cn.getAttribute("name") == "GetAll":
809
for arg in cn.getElementsByTagName("arg"):
810
if (arg.getAttribute("direction")
811
== "out"):
812
arg.setAttribute("name", "props")
813
xmlstring = document.toxml("utf-8")
814
document.unlink()
815
except (AttributeError, xml.dom.DOMException,
816
xml.parsers.expat.ExpatError) as error:
817
logger.error("Failed to override Introspection method",
818
error)
819
return xmlstring
820
821
822
def datetime_to_dbus (dt, variant_level=0):
823
"""Convert a UTC datetime.datetime() to a D-Bus type."""
824
if dt is None:
825
return dbus.String("", variant_level = variant_level)
826
return dbus.String(dt.isoformat(),
827
variant_level=variant_level)
828
829
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
830
.__metaclass__):
831
"""Applied to an empty subclass of a D-Bus object, this metaclass
832
will add additional D-Bus attributes matching a certain pattern.
833
"""
834
def __new__(mcs, name, bases, attr):
835
# Go through all the base classes which could have D-Bus
836
# methods, signals, or properties in them
837
for base in (b for b in bases
838
if issubclass(b, dbus.service.Object)):
839
# Go though all attributes of the base class
840
for attrname, attribute in inspect.getmembers(base):
841
# Ignore non-D-Bus attributes, and D-Bus attributes
842
# with the wrong interface name
843
if (not hasattr(attribute, "_dbus_interface")
844
or not attribute._dbus_interface
845
.startswith("se.recompile.Mandos")):
846
continue
847
# Create an alternate D-Bus interface name based on
848
# the current name
849
alt_interface = (attribute._dbus_interface
850
.replace("se.recompile.Mandos",
851
"se.bsnet.fukt.Mandos"))
852
# Is this a D-Bus signal?
853
if getattr(attribute, "_dbus_is_signal", False):
854
# Extract the original non-method function by
855
# black magic
856
nonmethod_func = (dict(
857
zip(attribute.func_code.co_freevars,
858
attribute.__closure__))["func"]
859
.cell_contents)
860
# Create a new, but exactly alike, function
861
# object, and decorate it to be a new D-Bus signal
862
# with the alternate D-Bus interface name
863
new_function = (dbus.service.signal
864
(alt_interface,
865
attribute._dbus_signature)
866
(types.FunctionType(
867
nonmethod_func.func_code,
868
nonmethod_func.func_globals,
869
nonmethod_func.func_name,
870
nonmethod_func.func_defaults,
871
nonmethod_func.func_closure)))
872
# Define a creator of a function to call both the
873
# old and new functions, so both the old and new
874
# signals gets sent when the function is called
875
def fixscope(func1, func2):
876
"""This function is a scope container to pass
877
func1 and func2 to the "call_both" function
878
outside of its arguments"""
879
def call_both(*args, **kwargs):
880
"""This function will emit two D-Bus
881
signals by calling func1 and func2"""
882
func1(*args, **kwargs)
883
func2(*args, **kwargs)
884
return call_both
885
# Create the "call_both" function and add it to
886
# the class
887
attr[attrname] = fixscope(attribute,
888
new_function)
889
# Is this a D-Bus method?
890
elif getattr(attribute, "_dbus_is_method", False):
891
# Create a new, but exactly alike, function
892
# object. Decorate it to be a new D-Bus method
893
# with the alternate D-Bus interface name. Add it
894
# to the class.
895
attr[attrname] = (dbus.service.method
896
(alt_interface,
897
attribute._dbus_in_signature,
898
attribute._dbus_out_signature)
899
(types.FunctionType
900
(attribute.func_code,
901
attribute.func_globals,
902
attribute.func_name,
903
attribute.func_defaults,
904
attribute.func_closure)))
905
# Is this a D-Bus property?
906
elif getattr(attribute, "_dbus_is_property", False):
907
# Create a new, but exactly alike, function
908
# object, and decorate it to be a new D-Bus
909
# property with the alternate D-Bus interface
910
# name. Add it to the class.
911
attr[attrname] = (dbus_service_property
912
(alt_interface,
913
attribute._dbus_signature,
914
attribute._dbus_access,
915
attribute
916
._dbus_get_args_options
917
["byte_arrays"])
918
(types.FunctionType
919
(attribute.func_code,
920
attribute.func_globals,
921
attribute.func_name,
922
attribute.func_defaults,
923
attribute.func_closure)))
924
return type.__new__(mcs, name, bases, attr)
925
926
class ClientDBus(Client, DBusObjectWithProperties):
927
"""A Client class using D-Bus
928
929
Attributes:
930
dbus_object_path: dbus.ObjectPath
931
bus: dbus.SystemBus()
932
"""
933
934
runtime_expansions = (Client.runtime_expansions
935
+ ("dbus_object_path",))
936
937
# dbus.service.Object doesn't use super(), so we can't either.
938
939
def __init__(self, bus = None, *args, **kwargs):
940
self.bus = bus
941
Client.__init__(self, *args, **kwargs)
942
943
self._approvals_pending = 0
944
# Only now, when this client is initialized, can it show up on
945
# the D-Bus
946
client_object_name = unicode(self.name).translate(
947
{ord("."): ord("_"),
948
ord("-"): ord("_")})
949
self.dbus_object_path = (dbus.ObjectPath
950
("/clients/" + client_object_name))
951
DBusObjectWithProperties.__init__(self, self.bus,
952
self.dbus_object_path)
953
954
def notifychangeproperty(transform_func,
955
dbus_name, type_func=lambda x: x,
956
variant_level=1):
957
""" Modify a variable so that it's a property which announces
958
its changes to DBus.
959
960
transform_fun: Function that takes a value and a variant_level
961
and transforms it to a D-Bus type.
962
dbus_name: D-Bus name of the variable
963
type_func: Function that transform the value before sending it
964
to the D-Bus. Default: no transform
965
variant_level: D-Bus variant level. Default: 1
966
"""
967
attrname = "_{0}".format(dbus_name)
968
def setter(self, value):
969
if hasattr(self, "dbus_object_path"):
970
if (not hasattr(self, attrname) or
971
type_func(getattr(self, attrname, None))
972
!= type_func(value)):
973
dbus_value = transform_func(type_func(value),
974
variant_level
975
=variant_level)
976
self.PropertyChanged(dbus.String(dbus_name),
977
dbus_value)
978
setattr(self, attrname, value)
979
980
return property(lambda self: getattr(self, attrname), setter)
981
982
983
expires = notifychangeproperty(datetime_to_dbus, "Expires")
984
approvals_pending = notifychangeproperty(dbus.Boolean,
985
"ApprovalPending",
986
type_func = bool)
987
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
988
last_enabled = notifychangeproperty(datetime_to_dbus,
989
"LastEnabled")
990
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
991
type_func = lambda checker:
992
checker is not None)
993
last_checked_ok = notifychangeproperty(datetime_to_dbus,
994
"LastCheckedOK")
995
last_approval_request = notifychangeproperty(
996
datetime_to_dbus, "LastApprovalRequest")
997
approved_by_default = notifychangeproperty(dbus.Boolean,
998
"ApprovedByDefault")
999
approval_delay = notifychangeproperty(dbus.UInt16,
1000
"ApprovalDelay",
1001
type_func =
1002
_timedelta_to_milliseconds)
1003
approval_duration = notifychangeproperty(
1004
dbus.UInt16, "ApprovalDuration",
1005
type_func = _timedelta_to_milliseconds)
1006
host = notifychangeproperty(dbus.String, "Host")
1007
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1008
type_func =
1009
_timedelta_to_milliseconds)
1010
extended_timeout = notifychangeproperty(
1011
dbus.UInt16, "ExtendedTimeout",
1012
type_func = _timedelta_to_milliseconds)
1013
interval = notifychangeproperty(dbus.UInt16,
1014
"Interval",
1015
type_func =
1016
_timedelta_to_milliseconds)
1017
checker_command = notifychangeproperty(dbus.String, "Checker")
1018
1019
del notifychangeproperty
1020
1021
def __del__(self, *args, **kwargs):
1022
try:
1023
self.remove_from_connection()
1024
except LookupError:
1025
pass
1026
if hasattr(DBusObjectWithProperties, "__del__"):
1027
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1028
Client.__del__(self, *args, **kwargs)
1029
1030
def checker_callback(self, pid, condition, command,
1031
*args, **kwargs):
246
gobject.source_remove(self.checker_callback_tag)
1032
247
self.checker_callback_tag = None
248
os.kill(self.checker.pid, signal.SIGTERM)
249
if self.checker.poll() is None:
250
os.kill(self.checker.pid, signal.SIGKILL)
1033
251
self.checker = None
1034
if os.WIFEXITED(condition):
1035
exitstatus = os.WEXITSTATUS(condition)
1036
# Emit D-Bus signal
1037
self.CheckerCompleted(dbus.Int16(exitstatus),
1038
dbus.Int64(condition),
1039
dbus.String(command))
1040
else:
1041
# Emit D-Bus signal
1042
self.CheckerCompleted(dbus.Int16(-1),
1043
dbus.Int64(condition),
1044
dbus.String(command))
1045
1046
return Client.checker_callback(self, pid, condition, command,
1047
*args, **kwargs)
1048
1049
def start_checker(self, *args, **kwargs):
1050
old_checker = self.checker
1051
if self.checker is not None:
1052
old_checker_pid = self.checker.pid
1053
else:
1054
old_checker_pid = None
1055
r = Client.start_checker(self, *args, **kwargs)
1056
# Only if new checker process was started
1057
if (self.checker is not None
1058
and old_checker_pid != self.checker.pid):
1059
# Emit D-Bus signal
1060
self.CheckerStarted(self.current_checker_command)
1061
return r
1062
1063
def _reset_approved(self):
1064
self._approved = None
1065
return False
1066
1067
def approve(self, value=True):
1068
self.send_changedstate()
1069
self._approved = value
1070
gobject.timeout_add(_timedelta_to_milliseconds
1071
(self.approval_duration),
1072
self._reset_approved)
1073
1074
1075
## D-Bus methods, signals & properties
1076
_interface = "se.recompile.Mandos.Client"
1077
1078
## Signals
1079
1080
# CheckerCompleted - signal
1081
@dbus.service.signal(_interface, signature="nxs")
1082
def CheckerCompleted(self, exitcode, waitstatus, command):
1083
"D-Bus signal"
1084
pass
1085
1086
# CheckerStarted - signal
1087
@dbus.service.signal(_interface, signature="s")
1088
def CheckerStarted(self, command):
1089
"D-Bus signal"
1090
pass
1091
1092
# PropertyChanged - signal
1093
@dbus.service.signal(_interface, signature="sv")
1094
def PropertyChanged(self, property, value):
1095
"D-Bus signal"
1096
pass
1097
1098
# GotSecret - signal
1099
@dbus.service.signal(_interface)
1100
def GotSecret(self):
1101
"""D-Bus signal
1102
Is sent after a successful transfer of secret from the Mandos
1103
server to mandos-client
1104
"""
1105
pass
1106
1107
# Rejected - signal
1108
@dbus.service.signal(_interface, signature="s")
1109
def Rejected(self, reason):
1110
"D-Bus signal"
1111
pass
1112
1113
# NeedApproval - signal
1114
@dbus.service.signal(_interface, signature="tb")
1115
def NeedApproval(self, timeout, default):
1116
"D-Bus signal"
1117
return self.need_approval()
1118
1119
## Methods
1120
1121
# Approve - method
1122
@dbus.service.method(_interface, in_signature="b")
1123
def Approve(self, value):
1124
self.approve(value)
1125
1126
# CheckedOK - method
1127
@dbus.service.method(_interface)
1128
def CheckedOK(self):
1129
self.checked_ok()
1130
1131
# Enable - method
1132
@dbus.service.method(_interface)
1133
def Enable(self):
1134
"D-Bus method"
1135
self.enable()
1136
1137
# StartChecker - method
1138
@dbus.service.method(_interface)
1139
def StartChecker(self):
1140
"D-Bus method"
1141
self.start_checker()
1142
1143
# Disable - method
1144
@dbus.service.method(_interface)
1145
def Disable(self):
1146
"D-Bus method"
1147
self.disable()
1148
1149
# StopChecker - method
1150
@dbus.service.method(_interface)
1151
def StopChecker(self):
1152
self.stop_checker()
1153
1154
## Properties
1155
1156
# ApprovalPending - property
1157
@dbus_service_property(_interface, signature="b", access="read")
1158
def ApprovalPending_dbus_property(self):
1159
return dbus.Boolean(bool(self.approvals_pending))
1160
1161
# ApprovedByDefault - property
1162
@dbus_service_property(_interface, signature="b",
1163
access="readwrite")
1164
def ApprovedByDefault_dbus_property(self, value=None):
1165
if value is None: # get
1166
return dbus.Boolean(self.approved_by_default)
1167
self.approved_by_default = bool(value)
1168
1169
# ApprovalDelay - property
1170
@dbus_service_property(_interface, signature="t",
1171
access="readwrite")
1172
def ApprovalDelay_dbus_property(self, value=None):
1173
if value is None: # get
1174
return dbus.UInt64(self.approval_delay_milliseconds())
1175
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1176
1177
# ApprovalDuration - property
1178
@dbus_service_property(_interface, signature="t",
1179
access="readwrite")
1180
def ApprovalDuration_dbus_property(self, value=None):
1181
if value is None: # get
1182
return dbus.UInt64(_timedelta_to_milliseconds(
1183
self.approval_duration))
1184
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1185
1186
# Name - property
1187
@dbus_service_property(_interface, signature="s", access="read")
1188
def Name_dbus_property(self):
1189
return dbus.String(self.name)
1190
1191
# Fingerprint - property
1192
@dbus_service_property(_interface, signature="s", access="read")
1193
def Fingerprint_dbus_property(self):
1194
return dbus.String(self.fingerprint)
1195
1196
# Host - property
1197
@dbus_service_property(_interface, signature="s",
1198
access="readwrite")
1199
def Host_dbus_property(self, value=None):
1200
if value is None: # get
1201
return dbus.String(self.host)
1202
self.host = value
1203
1204
# Created - property
1205
@dbus_service_property(_interface, signature="s", access="read")
1206
def Created_dbus_property(self):
1207
return dbus.String(datetime_to_dbus(self.created))
1208
1209
# LastEnabled - property
1210
@dbus_service_property(_interface, signature="s", access="read")
1211
def LastEnabled_dbus_property(self):
1212
return datetime_to_dbus(self.last_enabled)
1213
1214
# Enabled - property
1215
@dbus_service_property(_interface, signature="b",
1216
access="readwrite")
1217
def Enabled_dbus_property(self, value=None):
1218
if value is None: # get
1219
return dbus.Boolean(self.enabled)
1220
if value:
1221
self.enable()
1222
else:
1223
self.disable()
1224
1225
# LastCheckedOK - property
1226
@dbus_service_property(_interface, signature="s",
1227
access="readwrite")
1228
def LastCheckedOK_dbus_property(self, value=None):
1229
if value is not None:
1230
self.checked_ok()
1231
return
1232
return datetime_to_dbus(self.last_checked_ok)
1233
1234
# Expires - property
1235
@dbus_service_property(_interface, signature="s", access="read")
1236
def Expires_dbus_property(self):
1237
return datetime_to_dbus(self.expires)
1238
1239
# LastApprovalRequest - property
1240
@dbus_service_property(_interface, signature="s", access="read")
1241
def LastApprovalRequest_dbus_property(self):
1242
return datetime_to_dbus(self.last_approval_request)
1243
1244
# Timeout - property
1245
@dbus_service_property(_interface, signature="t",
1246
access="readwrite")
1247
def Timeout_dbus_property(self, value=None):
1248
if value is None: # get
1249
return dbus.UInt64(self.timeout_milliseconds())
1250
self.timeout = datetime.timedelta(0, 0, 0, value)
1251
if getattr(self, "disable_initiator_tag", None) is None:
1252
return
1253
# Reschedule timeout
1254
gobject.source_remove(self.disable_initiator_tag)
1255
self.disable_initiator_tag = None
1256
self.expires = None
1257
time_to_die = _timedelta_to_milliseconds((self
1258
.last_checked_ok
1259
+ self.timeout)
1260
- datetime.datetime
1261
.utcnow())
1262
if time_to_die <= 0:
1263
# The timeout has passed
1264
self.disable()
1265
else:
1266
self.expires = (datetime.datetime.utcnow()
1267
+ datetime.timedelta(milliseconds =
1268
time_to_die))
1269
self.disable_initiator_tag = (gobject.timeout_add
1270
(time_to_die, self.disable))
1271
1272
# ExtendedTimeout - property
1273
@dbus_service_property(_interface, signature="t",
1274
access="readwrite")
1275
def ExtendedTimeout_dbus_property(self, value=None):
1276
if value is None: # get
1277
return dbus.UInt64(self.extended_timeout_milliseconds())
1278
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1279
1280
# Interval - property
1281
@dbus_service_property(_interface, signature="t",
1282
access="readwrite")
1283
def Interval_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.UInt64(self.interval_milliseconds())
1286
self.interval = datetime.timedelta(0, 0, 0, value)
1287
if getattr(self, "checker_initiator_tag", None) is None:
1288
return
1289
# Reschedule checker run
1290
gobject.source_remove(self.checker_initiator_tag)
1291
self.checker_initiator_tag = (gobject.timeout_add
1292
(value, self.start_checker))
1293
self.start_checker() # Start one now, too
1294
1295
# Checker - property
1296
@dbus_service_property(_interface, signature="s",
1297
access="readwrite")
1298
def Checker_dbus_property(self, value=None):
1299
if value is None: # get
1300
return dbus.String(self.checker_command)
1301
self.checker_command = value
1302
1303
# CheckerRunning - property
1304
@dbus_service_property(_interface, signature="b",
1305
access="readwrite")
1306
def CheckerRunning_dbus_property(self, value=None):
1307
if value is None: # get
1308
return dbus.Boolean(self.checker is not None)
1309
if value:
1310
self.start_checker()
1311
else:
1312
self.stop_checker()
1313
1314
# ObjectPath - property
1315
@dbus_service_property(_interface, signature="o", access="read")
1316
def ObjectPath_dbus_property(self):
1317
return self.dbus_object_path # is already a dbus.ObjectPath
1318
1319
# Secret = property
1320
@dbus_service_property(_interface, signature="ay",
1321
access="write", byte_arrays=True)
1322
def Secret_dbus_property(self, value):
1323
self.secret = str(value)
1324
1325
del _interface
1326
1327
1328
class ProxyClient(object):
1329
def __init__(self, child_pipe, fpr, address):
1330
self._pipe = child_pipe
1331
self._pipe.send(('init', fpr, address))
1332
if not self._pipe.recv():
1333
raise KeyError()
1334
1335
def __getattribute__(self, name):
1336
if(name == '_pipe'):
1337
return super(ProxyClient, self).__getattribute__(name)
1338
self._pipe.send(('getattr', name))
1339
data = self._pipe.recv()
1340
if data[0] == 'data':
1341
return data[1]
1342
if data[0] == 'function':
1343
def func(*args, **kwargs):
1344
self._pipe.send(('funcall', name, args, kwargs))
1345
return self._pipe.recv()[1]
1346
return func
1347
1348
def __setattr__(self, name, value):
1349
if(name == '_pipe'):
1350
return super(ProxyClient, self).__setattr__(name, value)
1351
self._pipe.send(('setattr', name, value))
1352
1353
class ClientDBusTransitional(ClientDBus):
1354
__metaclass__ = AlternateDBusNamesMetaclass
1355
1356
class ClientHandler(socketserver.BaseRequestHandler, object):
1357
"""A class to handle client connections.
1358
1359
Instantiated once for each connection to handle it.
252
def still_valid(self, now=None):
253
"""Has the timeout not yet passed for this client?"""
254
if now is None:
255
now = datetime.datetime.now()
256
if self.last_seen is None:
257
return now < (self.created + self.timeout)
258
else:
259
return now < (self.last_seen + self.timeout)
260
261
262
def peer_certificate(session):
263
"Return an OpenPGP data packet string for the peer's certificate"
264
# If not an OpenPGP certificate...
265
if gnutls.library.functions.gnutls_certificate_type_get\
266
(session._c_object) \
267
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
268
# ...do the normal thing
269
return session.peer_certificate
270
list_size = ctypes.c_uint()
271
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
272
(session._c_object, ctypes.byref(list_size))
273
if list_size.value == 0:
274
return None
275
cert = cert_list[0]
276
return ctypes.string_at(cert.data, cert.size)
277
278
279
def fingerprint(openpgp):
280
"Convert an OpenPGP data string to a hexdigit fingerprint string"
281
# New empty GnuTLS certificate
282
crt = gnutls.library.types.gnutls_openpgp_crt_t()
283
gnutls.library.functions.gnutls_openpgp_crt_init\
284
(ctypes.byref(crt))
285
# New GnuTLS "datum" with the OpenPGP public key
286
datum = gnutls.library.types.gnutls_datum_t\
287
(ctypes.cast(ctypes.c_char_p(openpgp),
288
ctypes.POINTER(ctypes.c_ubyte)),
289
ctypes.c_uint(len(openpgp)))
290
# Import the OpenPGP public key into the certificate
291
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
292
(crt,
293
ctypes.byref(datum),
294
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
295
# New buffer for the fingerprint
296
buffer = ctypes.create_string_buffer(20)
297
buffer_length = ctypes.c_size_t()
298
# Get the fingerprint from the certificate into the buffer
299
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
300
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
301
# Deinit the certificate
302
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
303
# Convert the buffer to a Python bytestring
304
fpr = ctypes.string_at(buffer, buffer_length.value)
305
# Convert the bytestring to hexadecimal notation
306
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
307
return hex_fpr
308
309
310
class tcp_handler(SocketServer.BaseRequestHandler, object):
311
"""A TCP request handler class.
312
Instantiated by IPv6_TCPServer for each request to handle it.
1360
313
Note: This will run in its own forked process."""
1361
314
1362
315
def handle(self):
1363
with contextlib.closing(self.server.child_pipe) as child_pipe:
1364
logger.info("TCP connection from: %s",
1365
unicode(self.client_address))
1366
logger.debug("Pipe FD: %d",
1367
self.server.child_pipe.fileno())
1368
1369
session = (gnutls.connection
1370
.ClientSession(self.request,
1371
gnutls.connection
1372
.X509Credentials()))
1373
1374
# Note: gnutls.connection.X509Credentials is really a
1375
# generic GnuTLS certificate credentials object so long as
1376
# no X.509 keys are added to it. Therefore, we can use it
1377
# here despite using OpenPGP certificates.
1378
1379
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1380
# "+AES-256-CBC", "+SHA1",
1381
# "+COMP-NULL", "+CTYPE-OPENPGP",
1382
# "+DHE-DSS"))
1383
# Use a fallback default, since this MUST be set.
1384
priority = self.server.gnutls_priority
1385
if priority is None:
1386
priority = "NORMAL"
1387
(gnutls.library.functions
1388
.gnutls_priority_set_direct(session._c_object,
1389
priority, None))
1390
1391
# Start communication using the Mandos protocol
1392
# Get protocol number
1393
line = self.request.makefile().readline()
1394
logger.debug("Protocol version: %r", line)
1395
try:
1396
if int(line.strip().split()[0]) > 1:
1397
raise RuntimeError
1398
except (ValueError, IndexError, RuntimeError) as error:
1399
logger.error("Unknown protocol version: %s", error)
1400
return
1401
1402
# Start GnuTLS connection
1403
try:
1404
session.handshake()
1405
except gnutls.errors.GNUTLSError as error:
1406
logger.warning("Handshake failed: %s", error)
1407
# Do not run session.bye() here: the session is not
1408
# established. Just abandon the request.
1409
return
1410
logger.debug("Handshake succeeded")
1411
1412
approval_required = False
1413
try:
1414
try:
1415
fpr = self.fingerprint(self.peer_certificate
1416
(session))
1417
except (TypeError,
1418
gnutls.errors.GNUTLSError) as error:
1419
logger.warning("Bad certificate: %s", error)
1420
return
1421
logger.debug("Fingerprint: %s", fpr)
1422
1423
try:
1424
client = ProxyClient(child_pipe, fpr,
1425
self.client_address)
1426
except KeyError:
1427
return
1428
1429
if client.approval_delay:
1430
delay = client.approval_delay
1431
client.approvals_pending += 1
1432
approval_required = True
1433
1434
while True:
1435
if not client.enabled:
1436
logger.info("Client %s is disabled",
1437
client.name)
1438
if self.server.use_dbus:
1439
# Emit D-Bus signal
1440
client.Rejected("Disabled")
1441
return
1442
1443
if client._approved or not client.approval_delay:
1444
#We are approved or approval is disabled
1445
break
1446
elif client._approved is None:
1447
logger.info("Client %s needs approval",
1448
client.name)
1449
if self.server.use_dbus:
1450
# Emit D-Bus signal
1451
client.NeedApproval(
1452
client.approval_delay_milliseconds(),
1453
client.approved_by_default)
1454
else:
1455
logger.warning("Client %s was not approved",
1456
client.name)
1457
if self.server.use_dbus:
1458
# Emit D-Bus signal
1459
client.Rejected("Denied")
1460
return
1461
1462
#wait until timeout or approved
1463
time = datetime.datetime.now()
1464
client.changedstate.acquire()
1465
(client.changedstate.wait
1466
(float(client._timedelta_to_milliseconds(delay)
1467
/ 1000)))
1468
client.changedstate.release()
1469
time2 = datetime.datetime.now()
1470
if (time2 - time) >= delay:
1471
if not client.approved_by_default:
1472
logger.warning("Client %s timed out while"
1473
" waiting for approval",
1474
client.name)
1475
if self.server.use_dbus:
1476
# Emit D-Bus signal
1477
client.Rejected("Approval timed out")
1478
return
1479
else:
1480
break
1481
else:
1482
delay -= time2 - time
1483
1484
sent_size = 0
1485
while sent_size < len(client.secret):
1486
try:
1487
sent = session.send(client.secret[sent_size:])
1488
except gnutls.errors.GNUTLSError as error:
1489
logger.warning("gnutls send failed")
1490
return
1491
logger.debug("Sent: %d, remaining: %d",
1492
sent, len(client.secret)
1493
- (sent_size + sent))
1494
sent_size += sent
1495
1496
logger.info("Sending secret to %s", client.name)
1497
# bump the timeout using extended_timeout
1498
client.checked_ok(client.extended_timeout)
1499
if self.server.use_dbus:
1500
# Emit D-Bus signal
1501
client.GotSecret()
1502
1503
finally:
1504
if approval_required:
1505
client.approvals_pending -= 1
1506
try:
1507
session.bye()
1508
except gnutls.errors.GNUTLSError as error:
1509
logger.warning("GnuTLS bye failed")
1510
1511
@staticmethod
1512
def peer_certificate(session):
1513
"Return the peer's OpenPGP certificate as a bytestring"
1514
# If not an OpenPGP certificate...
1515
if (gnutls.library.functions
1516
.gnutls_certificate_type_get(session._c_object)
1517
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1518
# ...do the normal thing
1519
return session.peer_certificate
1520
list_size = ctypes.c_uint(1)
1521
cert_list = (gnutls.library.functions
1522
.gnutls_certificate_get_peers
1523
(session._c_object, ctypes.byref(list_size)))
1524
if not bool(cert_list) and list_size.value != 0:
1525
raise gnutls.errors.GNUTLSError("error getting peer"
1526
" certificate")
1527
if list_size.value == 0:
1528
return None
1529
cert = cert_list[0]
1530
return ctypes.string_at(cert.data, cert.size)
1531
1532
@staticmethod
1533
def fingerprint(openpgp):
1534
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1535
# New GnuTLS "datum" with the OpenPGP public key
1536
datum = (gnutls.library.types
1537
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1538
ctypes.POINTER
1539
(ctypes.c_ubyte)),
1540
ctypes.c_uint(len(openpgp))))
1541
# New empty GnuTLS certificate
1542
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1543
(gnutls.library.functions
1544
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1545
# Import the OpenPGP public key into the certificate
1546
(gnutls.library.functions
1547
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1548
gnutls.library.constants
1549
.GNUTLS_OPENPGP_FMT_RAW))
1550
# Verify the self signature in the key
1551
crtverify = ctypes.c_uint()
1552
(gnutls.library.functions
1553
.gnutls_openpgp_crt_verify_self(crt, 0,
1554
ctypes.byref(crtverify)))
1555
if crtverify.value != 0:
1556
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1557
raise (gnutls.errors.CertificateSecurityError
1558
("Verify failed"))
1559
# New buffer for the fingerprint
1560
buf = ctypes.create_string_buffer(20)
1561
buf_len = ctypes.c_size_t()
1562
# Get the fingerprint from the certificate into the buffer
1563
(gnutls.library.functions
1564
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1565
ctypes.byref(buf_len)))
1566
# Deinit the certificate
1567
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1568
# Convert the buffer to a Python bytestring
1569
fpr = ctypes.string_at(buf, buf_len.value)
1570
# Convert the bytestring to hexadecimal notation
1571
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1572
return hex_fpr
1573
1574
1575
class MultiprocessingMixIn(object):
1576
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1577
def sub_process_main(self, request, address):
1578
try:
1579
self.finish_request(request, address)
1580
except:
1581
self.handle_error(request, address)
1582
self.close_request(request)
1583
1584
def process_request(self, request, address):
1585
"""Start a new process to process the request."""
1586
proc = multiprocessing.Process(target = self.sub_process_main,
1587
args = (request,
1588
address))
1589
proc.start()
1590
return proc
1591
1592
1593
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1594
""" adds a pipe to the MixIn """
1595
def process_request(self, request, client_address):
1596
"""Overrides and wraps the original process_request().
1597
1598
This function creates a new pipe in self.pipe
1599
"""
1600
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1601
1602
proc = MultiprocessingMixIn.process_request(self, request,
1603
client_address)
1604
self.child_pipe.close()
1605
self.add_pipe(parent_pipe, proc)
1606
1607
def add_pipe(self, parent_pipe, proc):
1608
"""Dummy function; override as necessary"""
1609
raise NotImplementedError
1610
1611
1612
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1613
socketserver.TCPServer, object):
1614
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1615
316
logger.debug(u"TCP connection from: %s",
317
unicode(self.client_address))
318
session = gnutls.connection.ClientSession(self.request,
319
gnutls.connection.\
320
X509Credentials())
321
322
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
323
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
324
# "+DHE-DSS"))
325
priority = "SECURE256"
326
327
gnutls.library.functions.gnutls_priority_set_direct\
328
(session._c_object, priority, None);
329
330
try:
331
session.handshake()
332
except gnutls.errors.GNUTLSError, error:
333
logger.debug(u"Handshake failed: %s", error)
334
# Do not run session.bye() here: the session is not
335
# established. Just abandon the request.
336
return
337
try:
338
fpr = fingerprint(peer_certificate(session))
339
except (TypeError, gnutls.errors.GNUTLSError), error:
340
logger.debug(u"Bad certificate: %s", error)
341
session.bye()
342
return
343
logger.debug(u"Fingerprint: %s", fpr)
344
client = None
345
for c in clients:
346
if c.fingerprint == fpr:
347
client = c
348
break
349
# Have to check if client.still_valid(), since it is possible
350
# that the client timed out while establishing the GnuTLS
351
# session.
352
if (not client) or (not client.still_valid()):
353
if client:
354
logger.debug(u"Client %(name)s is invalid",
355
vars(client))
356
else:
357
logger.debug(u"Client not found for fingerprint: %s",
358
fpr)
359
session.bye()
360
return
361
sent_size = 0
362
while sent_size < len(client.secret):
363
sent = session.send(client.secret[sent_size:])
364
logger.debug(u"Sent: %d, remaining: %d",
365
sent, len(client.secret)
366
- (sent_size + sent))
367
sent_size += sent
368
session.bye()
369
370
371
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
372
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1616
373
Attributes:
1617
enabled: Boolean; whether this server is activated yet
1618
interface: None or a network interface name (string)
1619
use_ipv6: Boolean; to use IPv6 or not
374
options: Command line options
375
clients: Set() of Client objects
1620
376
"""
1621
def __init__(self, server_address, RequestHandlerClass,
1622
interface=None, use_ipv6=True):
1623
self.interface = interface
1624
if use_ipv6:
1625
self.address_family = socket.AF_INET6
1626
socketserver.TCPServer.__init__(self, server_address,
1627
RequestHandlerClass)
377
address_family = socket.AF_INET6
378
def __init__(self, *args, **kwargs):
379
if "options" in kwargs:
380
self.options = kwargs["options"]
381
del kwargs["options"]
382
if "clients" in kwargs:
383
self.clients = kwargs["clients"]
384
del kwargs["clients"]
385
return super(type(self), self).__init__(*args, **kwargs)
1628
386
def server_bind(self):
1629
387
"""This overrides the normal server_bind() function
1630
388
to bind to an interface if one was specified, and also NOT to
1631
389
bind to an address or port if they were not specified."""
1632
if self.interface is not None:
1633
if SO_BINDTODEVICE is None:
1634
logger.error("SO_BINDTODEVICE does not exist;"
1635
" cannot bind to interface %s",
1636
self.interface)
1637
else:
1638
try:
1639
self.socket.setsockopt(socket.SOL_SOCKET,
1640
SO_BINDTODEVICE,
1641
str(self.interface
1642
+ '\0'))
1643
except socket.error as error:
1644
if error[0] == errno.EPERM:
1645
logger.error("No permission to"
1646
" bind to interface %s",
1647
self.interface)
1648
elif error[0] == errno.ENOPROTOOPT:
1649
logger.error("SO_BINDTODEVICE not available;"
1650
" cannot bind to interface %s",
1651
self.interface)
1652
else:
1653
raise
390
if self.options.interface:
391
if not hasattr(socket, "SO_BINDTODEVICE"):
392
# From /usr/include/asm-i486/socket.h
393
socket.SO_BINDTODEVICE = 25
394
try:
395
self.socket.setsockopt(socket.SOL_SOCKET,
396
socket.SO_BINDTODEVICE,
397
self.options.interface)
398
except socket.error, error:
399
if error[0] == errno.EPERM:
400
logger.warning(u"No permission to"
401
u" bind to interface %s",
402
self.options.interface)
403
else:
404
raise error
1654
405
# Only bind(2) the socket if we really need to.
1655
406
if self.server_address[0] or self.server_address[1]:
1656
407
if not self.server_address[0]:
1657
if self.address_family == socket.AF_INET6:
1658
any_address = "::" # in6addr_any
1659
else:
1660
any_address = socket.INADDR_ANY
1661
self.server_address = (any_address,
408
in6addr_any = "::"
409
self.server_address = (in6addr_any,
1662
410
self.server_address[1])
1663
elif not self.server_address[1]:
411
elif self.server_address[1] is None:
1664
412
self.server_address = (self.server_address[0],
1665
413
0)
1666
# if self.interface:
1667
# self.server_address = (self.server_address[0],
1668
# 0, # port
1669
# 0, # flowinfo
1670
# if_nametoindex
1671
# (self.interface))
1672
return socketserver.TCPServer.server_bind(self)
1673
1674
1675
class MandosServer(IPv6_TCPServer):
1676
"""Mandos server.
1677
1678
Attributes:
1679
clients: set of Client objects
1680
gnutls_priority GnuTLS priority string
1681
use_dbus: Boolean; to emit D-Bus signals or not
1682
1683
Assumes a gobject.MainLoop event loop.
1684
"""
1685
def __init__(self, server_address, RequestHandlerClass,
1686
interface=None, use_ipv6=True, clients=None,
1687
gnutls_priority=None, use_dbus=True):
1688
self.enabled = False
1689
self.clients = clients
1690
if self.clients is None:
1691
self.clients = {}
1692
self.use_dbus = use_dbus
1693
self.gnutls_priority = gnutls_priority
1694
IPv6_TCPServer.__init__(self, server_address,
1695
RequestHandlerClass,
1696
interface = interface,
1697
use_ipv6 = use_ipv6)
1698
def server_activate(self):
1699
if self.enabled:
1700
return socketserver.TCPServer.server_activate(self)
1701
1702
def enable(self):
1703
self.enabled = True
1704
1705
def add_pipe(self, parent_pipe, proc):
1706
# Call "handle_ipc" for both data and EOF events
1707
gobject.io_add_watch(parent_pipe.fileno(),
1708
gobject.IO_IN | gobject.IO_HUP,
1709
functools.partial(self.handle_ipc,
1710
parent_pipe =
1711
parent_pipe,
1712
proc = proc))
1713
1714
def handle_ipc(self, source, condition, parent_pipe=None,
1715
proc = None, client_object=None):
1716
condition_names = {
1717
gobject.IO_IN: "IN", # There is data to read.
1718
gobject.IO_OUT: "OUT", # Data can be written (without
1719
# blocking).
1720
gobject.IO_PRI: "PRI", # There is urgent data to read.
1721
gobject.IO_ERR: "ERR", # Error condition.
1722
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1723
# broken, usually for pipes and
1724
# sockets).
1725
}
1726
conditions_string = ' | '.join(name
1727
for cond, name in
1728
condition_names.iteritems()
1729
if cond & condition)
1730
# error, or the other end of multiprocessing.Pipe has closed
1731
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1732
# Wait for other process to exit
1733
proc.join()
1734
return False
1735
1736
# Read a request from the child
1737
request = parent_pipe.recv()
1738
command = request[0]
1739
1740
if command == 'init':
1741
fpr = request[1]
1742
address = request[2]
1743
1744
for c in self.clients.itervalues():
1745
if c.fingerprint == fpr:
1746
client = c
1747
break
1748
else:
1749
logger.info("Client not found for fingerprint: %s, ad"
1750
"dress: %s", fpr, address)
1751
if self.use_dbus:
1752
# Emit D-Bus signal
1753
mandos_dbus_service.ClientNotFound(fpr,
1754
address[0])
1755
parent_pipe.send(False)
1756
return False
1757
1758
gobject.io_add_watch(parent_pipe.fileno(),
1759
gobject.IO_IN | gobject.IO_HUP,
1760
functools.partial(self.handle_ipc,
1761
parent_pipe =
1762
parent_pipe,
1763
proc = proc,
1764
client_object =
1765
client))
1766
parent_pipe.send(True)
1767
# remove the old hook in favor of the new above hook on
1768
# same fileno
1769
return False
1770
if command == 'funcall':
1771
funcname = request[1]
1772
args = request[2]
1773
kwargs = request[3]
1774
1775
parent_pipe.send(('data', getattr(client_object,
1776
funcname)(*args,
1777
**kwargs)))
1778
1779
if command == 'getattr':
1780
attrname = request[1]
1781
if callable(client_object.__getattribute__(attrname)):
1782
parent_pipe.send(('function',))
1783
else:
1784
parent_pipe.send(('data', client_object
1785
.__getattribute__(attrname)))
1786
1787
if command == 'setattr':
1788
attrname = request[1]
1789
value = request[2]
1790
setattr(client_object, attrname, value)
1791
1792
return True
414
return super(type(self), self).server_bind()
1793
415
1794
416
1795
417
def string_to_delta(interval):
1796
418
"""Parse a string and return a datetime.timedelta
1797
419
1798
420
>>> string_to_delta('7d')
1799
421
datetime.timedelta(7)
1800
422
>>> string_to_delta('60s')
1803
425
datetime.timedelta(0, 3600)
1804
426
>>> string_to_delta('24h')
1805
427
datetime.timedelta(1)
1806
>>> string_to_delta('1w')
428
>>> string_to_delta(u'1w')
1807
429
datetime.timedelta(7)
1808
>>> string_to_delta('5m 30s')
1809
datetime.timedelta(0, 330)
1810
430
"""
1811
timevalue = datetime.timedelta(0)
1812
for s in interval.split():
1813
try:
1814
suffix = unicode(s[-1])
1815
value = int(s[:-1])
1816
if suffix == "d":
1817
delta = datetime.timedelta(value)
1818
elif suffix == "s":
1819
delta = datetime.timedelta(0, value)
1820
elif suffix == "m":
1821
delta = datetime.timedelta(0, 0, 0, 0, value)
1822
elif suffix == "h":
1823
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1824
elif suffix == "w":
1825
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1826
else:
1827
raise ValueError("Unknown suffix %r" % suffix)
1828
except (ValueError, IndexError) as e:
1829
raise ValueError(*(e.args))
1830
timevalue += delta
1831
return timevalue
431
try:
432
suffix=unicode(interval[-1])
433
value=int(interval[:-1])
434
if suffix == u"d":
435
delta = datetime.timedelta(value)
436
elif suffix == u"s":
437
delta = datetime.timedelta(0, value)
438
elif suffix == u"m":
439
delta = datetime.timedelta(0, 0, 0, 0, value)
440
elif suffix == u"h":
441
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
442
elif suffix == u"w":
443
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
444
else:
445
raise ValueError
446
except (ValueError, IndexError):
447
raise ValueError
448
return delta
449
450
451
def add_service():
452
"""From the Avahi server example code"""
453
global group, serviceName, serviceType, servicePort, serviceTXT, \
454
domain, host
455
if group is None:
456
group = dbus.Interface(
457
bus.get_object( avahi.DBUS_NAME,
458
server.EntryGroupNew()),
459
avahi.DBUS_INTERFACE_ENTRY_GROUP)
460
group.connect_to_signal('StateChanged',
461
entry_group_state_changed)
462
logger.debug(u"Adding service '%s' of type '%s' ...",
463
serviceName, serviceType)
464
465
group.AddService(
466
serviceInterface, # interface
467
avahi.PROTO_INET6, # protocol
468
dbus.UInt32(0), # flags
469
serviceName, serviceType,
470
domain, host,
471
dbus.UInt16(servicePort),
472
avahi.string_array_to_txt_array(serviceTXT))
473
group.Commit()
474
475
476
def remove_service():
477
"""From the Avahi server example code"""
478
global group
479
480
if not group is None:
481
group.Reset()
482
483
484
def server_state_changed(state):
485
"""From the Avahi server example code"""
486
if state == avahi.SERVER_COLLISION:
487
logger.warning(u"Server name collision")
488
remove_service()
489
elif state == avahi.SERVER_RUNNING:
490
add_service()
491
492
493
def entry_group_state_changed(state, error):
494
"""From the Avahi server example code"""
495
global serviceName, server, rename_count
496
497
logger.debug(u"state change: %i", state)
498
499
if state == avahi.ENTRY_GROUP_ESTABLISHED:
500
logger.debug(u"Service established.")
501
elif state == avahi.ENTRY_GROUP_COLLISION:
502
503
rename_count = rename_count - 1
504
if rename_count > 0:
505
name = server.GetAlternativeServiceName(name)
506
logger.warning(u"Service name collision, "
507
u"changing name to '%s' ...", name)
508
remove_service()
509
add_service()
510
511
else:
512
logger.error(u"No suitable service name found after %i"
513
u" retries, exiting.", n_rename)
514
killme(1)
515
elif state == avahi.ENTRY_GROUP_FAILURE:
516
logger.error(u"Error in group state changed %s",
517
unicode(error))
518
killme(1)
1832
519
1833
520
1834
521
def if_nametoindex(interface):
1835
"""Call the C function if_nametoindex(), or equivalent
1836
1837
Note: This function cannot accept a unicode string."""
1838
global if_nametoindex
522
"""Call the C function if_nametoindex()"""
1839
523
try:
1840
if_nametoindex = (ctypes.cdll.LoadLibrary
1841
(ctypes.util.find_library("c"))
1842
.if_nametoindex)
524
libc = ctypes.cdll.LoadLibrary("libc.so.6")
525
return libc.if_nametoindex(interface)
1843
526
except (OSError, AttributeError):
1844
logger.warning("Doing if_nametoindex the hard way")
1845
def if_nametoindex(interface):
1846
"Get an interface index the hard way, i.e. using fcntl()"
1847
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1848
with contextlib.closing(socket.socket()) as s:
1849
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1850
struct.pack(str("16s16x"),
1851
interface))
1852
interface_index = struct.unpack(str("I"),
1853
ifreq[16:20])[0]
1854
return interface_index
1855
return if_nametoindex(interface)
1856
1857
1858
def daemon(nochdir = False, noclose = False):
527
if "struct" not in sys.modules:
528
import struct
529
if "fcntl" not in sys.modules:
530
import fcntl
531
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
532
s = socket.socket()
533
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
534
struct.pack("16s16x", interface))
535
s.close()
536
interface_index = struct.unpack("I", ifreq[16:20])[0]
537
return interface_index
538
539
540
def daemon(nochdir, noclose):
1859
541
"""See daemon(3). Standard BSD Unix function.
1860
1861
542
This should really exist as os.daemon, but it doesn't (yet)."""
1862
543
if os.fork():
1863
544
sys.exit()
1864
545
os.setsid()
1865
546
if not nochdir:
1866
547
os.chdir("/")
1867
if os.fork():
1868
sys.exit()
1869
548
if not noclose:
1870
549
# Close all standard open file descriptors
1871
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
550
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
1872
551
if not stat.S_ISCHR(os.fstat(null).st_mode):
1873
552
raise OSError(errno.ENODEV,
1874
"%s not a character device"
1875
% os.path.devnull)
553
"/dev/null not a character device")
1876
554
os.dup2(null, sys.stdin.fileno())
1877
555
os.dup2(null, sys.stdout.fileno())
1878
556
os.dup2(null, sys.stderr.fileno())
1880
558
os.close(null)
1881
559
1882
560
1883
def main():
1884
1885
##################################################################
1886
# Parsing of options, both command line and config file
1887
1888
parser = argparse.ArgumentParser()
1889
parser.add_argument("-v", "--version", action="version",
1890
version = "%%(prog)s %s" % version,
1891
help="show version number and exit")
1892
parser.add_argument("-i", "--interface", metavar="IF",
1893
help="Bind to interface IF")
1894
parser.add_argument("-a", "--address",
1895
help="Address to listen for requests on")
1896
parser.add_argument("-p", "--port", type=int,
1897
help="Port number to receive requests on")
1898
parser.add_argument("--check", action="store_true",
1899
help="Run self-test")
1900
parser.add_argument("--debug", action="store_true",
1901
help="Debug mode; run in foreground and log"
1902
" to terminal")
1903
parser.add_argument("--debuglevel", metavar="LEVEL",
1904
help="Debug level for stdout output")
1905
parser.add_argument("--priority", help="GnuTLS"
1906
" priority string (see GnuTLS documentation)")
1907
parser.add_argument("--servicename",
1908
metavar="NAME", help="Zeroconf service name")
1909
parser.add_argument("--configdir",
1910
default="/etc/mandos", metavar="DIR",
1911
help="Directory to search for configuration"
1912
" files")
1913
parser.add_argument("--no-dbus", action="store_false",
1914
dest="use_dbus", help="Do not provide D-Bus"
1915
" system bus interface")
1916
parser.add_argument("--no-ipv6", action="store_false",
1917
dest="use_ipv6", help="Do not use IPv6")
1918
parser.add_argument("--no-restore", action="store_false",
1919
dest="restore", help="Do not restore old state",
1920
default=True)
1921
1922
options = parser.parse_args()
561
def killme(status = 0):
562
logger.debug("Stopping server with exit status %d", status)
563
exitstatus = status
564
if main_loop_started:
565
main_loop.quit()
566
else:
567
sys.exit(status)
568
569
570
if __name__ == '__main__':
571
exitstatus = 0
572
main_loop_started = False
573
parser = OptionParser()
574
parser.add_option("-i", "--interface", type="string",
575
default=None, metavar="IF",
576
help="Bind to interface IF")
577
parser.add_option("-p", "--port", type="int", default=None,
578
help="Port number to receive requests on")
579
parser.add_option("--timeout", type="string", # Parsed later
580
default="1h",
581
help="Amount of downtime allowed for clients")
582
parser.add_option("--interval", type="string", # Parsed later
583
default="5m",
584
help="How often to check that a client is up")
585
parser.add_option("--check", action="store_true", default=False,
586
help="Run self-test")
587
parser.add_option("--debug", action="store_true", default=False,
588
help="Debug mode")
589
(options, args) = parser.parse_args()
1923
590
1924
591
if options.check:
1925
592
import doctest
1926
593
doctest.testmod()
1927
594
sys.exit()
1928
595
1929
# Default values for config file for server-global settings
1930
server_defaults = { "interface": "",
1931
"address": "",
1932
"port": "",
1933
"debug": "False",
1934
"priority":
1935
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1936
"servicename": "Mandos",
1937
"use_dbus": "True",
1938
"use_ipv6": "True",
1939
"debuglevel": "",
1940
}
1941
1942
# Parse config file for server-global settings
1943
server_config = configparser.SafeConfigParser(server_defaults)
1944
del server_defaults
1945
server_config.read(os.path.join(options.configdir,
1946
"mandos.conf"))
1947
# Convert the SafeConfigParser object to a dict
1948
server_settings = server_config.defaults()
1949
# Use the appropriate methods on the non-string config options
1950
for option in ("debug", "use_dbus", "use_ipv6"):
1951
server_settings[option] = server_config.getboolean("DEFAULT",
1952
option)
1953
if server_settings["port"]:
1954
server_settings["port"] = server_config.getint("DEFAULT",
1955
"port")
1956
del server_config
1957
1958
# Override the settings from the config file with command line
1959
# options, if set.
1960
for option in ("interface", "address", "port", "debug",
1961
"priority", "servicename", "configdir",
1962
"use_dbus", "use_ipv6", "debuglevel", "restore"):
1963
value = getattr(options, option)
1964
if value is not None:
1965
server_settings[option] = value
1966
del options
1967
# Force all strings to be unicode
1968
for option in server_settings.keys():
1969
if type(server_settings[option]) is str:
1970
server_settings[option] = unicode(server_settings[option])
1971
# Now we have our good server settings in "server_settings"
1972
1973
##################################################################
1974
1975
# For convenience
1976
debug = server_settings["debug"]
1977
debuglevel = server_settings["debuglevel"]
1978
use_dbus = server_settings["use_dbus"]
1979
use_ipv6 = server_settings["use_ipv6"]
1980
1981
if server_settings["servicename"] != "Mandos":
1982
syslogger.setFormatter(logging.Formatter
1983
('Mandos (%s) [%%(process)d]:'
1984
' %%(levelname)s: %%(message)s'
1985
% server_settings["servicename"]))
1986
1987
# Parse config file with clients
1988
client_defaults = { "timeout": "5m",
1989
"extended_timeout": "15m",
1990
"interval": "2m",
1991
"checker": "fping -q -- %%(host)s",
1992
"host": "",
1993
"approval_delay": "0s",
1994
"approval_duration": "1s",
1995
}
1996
client_config = configparser.SafeConfigParser(client_defaults)
1997
client_config.read(os.path.join(server_settings["configdir"],
1998
"clients.conf"))
1999
2000
global mandos_dbus_service
2001
mandos_dbus_service = None
2002
2003
tcp_server = MandosServer((server_settings["address"],
2004
server_settings["port"]),
2005
ClientHandler,
2006
interface=(server_settings["interface"]
2007
or None),
2008
use_ipv6=use_ipv6,
2009
gnutls_priority=
2010
server_settings["priority"],
2011
use_dbus=use_dbus)
2012
if not debug:
2013
pidfilename = "/var/run/mandos.pid"
2014
try:
2015
pidfile = open(pidfilename, "w")
2016
except IOError:
2017
logger.error("Could not open file %r", pidfilename)
2018
2019
try:
2020
uid = pwd.getpwnam("_mandos").pw_uid
2021
gid = pwd.getpwnam("_mandos").pw_gid
2022
except KeyError:
2023
try:
2024
uid = pwd.getpwnam("mandos").pw_uid
2025
gid = pwd.getpwnam("mandos").pw_gid
2026
except KeyError:
2027
try:
2028
uid = pwd.getpwnam("nobody").pw_uid
2029
gid = pwd.getpwnam("nobody").pw_gid
2030
except KeyError:
2031
uid = 65534
2032
gid = 65534
2033
try:
2034
os.setgid(gid)
2035
os.setuid(uid)
2036
except OSError as error:
2037
if error[0] != errno.EPERM:
2038
raise error
2039
2040
if not debug and not debuglevel:
2041
syslogger.setLevel(logging.WARNING)
2042
console.setLevel(logging.WARNING)
2043
if debuglevel:
2044
level = getattr(logging, debuglevel.upper())
2045
syslogger.setLevel(level)
2046
console.setLevel(level)
2047
2048
if debug:
2049
# Enable all possible GnuTLS debugging
2050
2051
# "Use a log level over 10 to enable all debugging options."
2052
# - GnuTLS manual
2053
gnutls.library.functions.gnutls_global_set_log_level(11)
2054
2055
@gnutls.library.types.gnutls_log_func
2056
def debug_gnutls(level, string):
2057
logger.debug("GnuTLS: %s", string[:-1])
2058
2059
(gnutls.library.functions
2060
.gnutls_global_set_log_function(debug_gnutls))
2061
2062
# Redirect stdin so all checkers get /dev/null
2063
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2064
os.dup2(null, sys.stdin.fileno())
2065
if null > 2:
2066
os.close(null)
2067
else:
2068
# No console logging
2069
logger.removeHandler(console)
2070
2071
# Need to fork before connecting to D-Bus
2072
if not debug:
2073
# Close all input and output, do double fork, etc.
2074
daemon()
2075
2076
global main_loop
2077
# From the Avahi example code
596
# Parse the time arguments
597
try:
598
options.timeout = string_to_delta(options.timeout)
599
except ValueError:
600
parser.error("option --timeout: Unparseable time")
601
try:
602
options.interval = string_to_delta(options.interval)
603
except ValueError:
604
parser.error("option --interval: Unparseable time")
605
606
# Parse config file
607
defaults = { "checker": "fping -q -- %%(fqdn)s" }
608
client_config = ConfigParser.SafeConfigParser(defaults)
609
#client_config.readfp(open("secrets.conf"), "secrets.conf")
610
client_config.read("mandos-clients.conf")
611
612
# From the Avahi server example code
2078
613
DBusGMainLoop(set_as_default=True )
2079
614
main_loop = gobject.MainLoop()
2080
615
bus = dbus.SystemBus()
616
server = dbus.Interface(
617
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
618
avahi.DBUS_INTERFACE_SERVER )
2081
619
# End of Avahi example code
2082
if use_dbus:
2083
try:
2084
bus_name = dbus.service.BusName("se.recompile.Mandos",
2085
bus, do_not_queue=True)
2086
old_bus_name = (dbus.service.BusName
2087
("se.bsnet.fukt.Mandos", bus,
2088
do_not_queue=True))
2089
except dbus.exceptions.NameExistsException as e:
2090
logger.error(unicode(e) + ", disabling D-Bus")
2091
use_dbus = False
2092
server_settings["use_dbus"] = False
2093
tcp_server.use_dbus = False
2094
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2095
service = AvahiService(name = server_settings["servicename"],
2096
servicetype = "_mandos._tcp",
2097
protocol = protocol, bus = bus)
2098
if server_settings["interface"]:
2099
service.interface = (if_nametoindex
2100
(str(server_settings["interface"])))
2101
2102
global multiprocessing_manager
2103
multiprocessing_manager = multiprocessing.Manager()
2104
2105
client_class = Client
2106
if use_dbus:
2107
client_class = functools.partial(ClientDBusTransitional,
2108
bus = bus)
2109
2110
special_settings = {
2111
# Some settings need to be accessd by special methods;
2112
# booleans need .getboolean(), etc. Here is a list of them:
2113
"approved_by_default":
2114
lambda section:
2115
client_config.getboolean(section, "approved_by_default"),
2116
}
2117
# Construct a new dict of client settings of this form:
2118
# { client_name: {setting_name: value, ...}, ...}
2119
# with exceptions for any special settings as defined above
2120
client_settings = dict((clientname,
2121
dict((setting,
2122
(value if setting not in special_settings
2123
else special_settings[setting](clientname)))
2124
for setting, value in client_config.items(clientname)))
2125
for clientname in client_config.sections())
2126
2127
old_client_settings = {}
2128
clients_data = []
2129
2130
if server_settings["restore"]:
2131
try:
2132
with open(stored_state_path, "rb") as stored_state:
2133
clients_data, old_client_settings = pickle.load(stored_state)
2134
os.remove(stored_state_path)
2135
except IOError as e:
2136
logger.warning("Could not load persistant state: {0}".format(e))
2137
if e.errno != errno.ENOENT:
2138
raise
2139
2140
for client in clients_data:
2141
client_name = client["name"]
2142
2143
# Decide which value to use after restoring saved state.
2144
# We have three different values: Old config file,
2145
# new config file, and saved state.
2146
# New config value takes precedence if it differs from old
2147
# config value, otherwise use saved state.
2148
for name, value in client_settings[client_name].items():
2149
try:
2150
# For each value in new config, check if it differs
2151
# from the old config value (Except for the "secret"
2152
# attribute)
2153
if name != "secret" and value != old_client_settings[client_name][name]:
2154
setattr(client, name, value)
2155
except KeyError:
2156
pass
2157
2158
# Clients who has passed its expire date, can still be enabled if its
2159
# last checker was sucessful. Clients who checkers failed before we
2160
# stored it state is asumed to had failed checker during downtime.
2161
if client["enabled"] and client["last_checked_ok"]:
2162
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2163
> client["interval"]):
2164
if client["last_checker_status"] != 0:
2165
client["enabled"] = False
2166
else:
2167
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2168
2169
client["changedstate"] = (multiprocessing_manager
2170
.Condition(multiprocessing_manager
2171
.Lock()))
2172
if use_dbus:
2173
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2174
tcp_server.clients[client_name] = new_client
2175
new_client.bus = bus
2176
for name, value in client.iteritems():
2177
setattr(new_client, name, value)
2178
client_object_name = unicode(client_name).translate(
2179
{ord("."): ord("_"),
2180
ord("-"): ord("_")})
2181
new_client.dbus_object_path = (dbus.ObjectPath
2182
("/clients/" + client_object_name))
2183
DBusObjectWithProperties.__init__(new_client,
2184
new_client.bus,
2185
new_client.dbus_object_path)
2186
else:
2187
tcp_server.clients[client_name] = Client.__new__(Client)
2188
for name, value in client.iteritems():
2189
setattr(tcp_server.clients[client_name], name, value)
2190
2191
tcp_server.clients[client_name].decrypt_secret(
2192
client_settings[client_name]["secret"])
2193
2194
# Create/remove clients based on new changes made to config
2195
for clientname in set(old_client_settings) - set(client_settings):
2196
del tcp_server.clients[clientname]
2197
for clientname in set(client_settings) - set(old_client_settings):
2198
tcp_server.clients[clientname] = (client_class(name = clientname,
2199
config =
2200
client_settings
2201
[clientname]))
2202
2203
2204
if not tcp_server.clients:
2205
logger.warning("No clients defined")
2206
620
621
debug = options.debug
622
623
if debug:
624
console = logging.StreamHandler()
625
# console.setLevel(logging.DEBUG)
626
console.setFormatter(logging.Formatter\
627
('%(levelname)s: %(message)s'))
628
logger.addHandler(console)
629
del console
630
631
clients = Set()
632
def remove_from_clients(client):
633
clients.remove(client)
634
if not clients:
635
logger.debug(u"No clients left, exiting")
636
killme()
637
638
clients.update(Set(Client(name=section, options=options,
639
stop_hook = remove_from_clients,
640
**(dict(client_config\
641
.items(section))))
642
for section in client_config.sections()))
643
2207
644
if not debug:
2208
try:
2209
with pidfile:
2210
pid = os.getpid()
2211
pidfile.write(str(pid) + "\n".encode("utf-8"))
2212
del pidfile
2213
except IOError:
2214
logger.error("Could not write to file %r with PID %d",
2215
pidfilename, pid)
2216
except NameError:
2217
# "pidfile" was never created
2218
pass
2219
del pidfilename
2220
2221
signal.signal(signal.SIGINT, signal.SIG_IGN)
2222
2223
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2224
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2225
2226
if use_dbus:
2227
class MandosDBusService(dbus.service.Object):
2228
"""A D-Bus proxy object"""
2229
def __init__(self):
2230
dbus.service.Object.__init__(self, bus, "/")
2231
_interface = "se.recompile.Mandos"
2232
2233
@dbus.service.signal(_interface, signature="o")
2234
def ClientAdded(self, objpath):
2235
"D-Bus signal"
2236
pass
2237
2238
@dbus.service.signal(_interface, signature="ss")
2239
def ClientNotFound(self, fingerprint, address):
2240
"D-Bus signal"
2241
pass
2242
2243
@dbus.service.signal(_interface, signature="os")
2244
def ClientRemoved(self, objpath, name):
2245
"D-Bus signal"
2246
pass
2247
2248
@dbus.service.method(_interface, out_signature="ao")
2249
def GetAllClients(self):
2250
"D-Bus method"
2251
return dbus.Array(c.dbus_object_path
2252
for c in
2253
tcp_server.clients.itervalues())
2254
2255
@dbus.service.method(_interface,
2256
out_signature="a{oa{sv}}")
2257
def GetAllClientsWithProperties(self):
2258
"D-Bus method"
2259
return dbus.Dictionary(
2260
((c.dbus_object_path, c.GetAll(""))
2261
for c in tcp_server.clients.itervalues()),
2262
signature="oa{sv}")
2263
2264
@dbus.service.method(_interface, in_signature="o")
2265
def RemoveClient(self, object_path):
2266
"D-Bus method"
2267
for c in tcp_server.clients.itervalues():
2268
if c.dbus_object_path == object_path:
2269
del tcp_server.clients[c.name]
2270
c.remove_from_connection()
2271
# Don't signal anything except ClientRemoved
2272
c.disable(quiet=True)
2273
# Emit D-Bus signal
2274
self.ClientRemoved(object_path, c.name)
2275
return
2276
raise KeyError(object_path)
2277
2278
del _interface
2279
2280
class MandosDBusServiceTransitional(MandosDBusService):
2281
__metaclass__ = AlternateDBusNamesMetaclass
2282
mandos_dbus_service = MandosDBusServiceTransitional()
645
daemon(False, False)
2283
646
2284
647
def cleanup():
2285
648
"Cleanup function; run on exit"
2286
service.cleanup()
649
global group
650
# From the Avahi server example code
651
if not group is None:
652
group.Free()
653
group = None
654
# End of Avahi example code
2287
655
2288
multiprocessing.active_children()
2289
if not (tcp_server.clients or client_settings):
2290
return
2291
2292
# Store client before exiting. Secrets are encrypted with key based
2293
# on what config file has. If config file is removed/edited, old
2294
# secret will thus be unrecovable.
2295
clients = []
2296
for client in tcp_server.clients.itervalues():
2297
client.encrypt_secret(client_settings[client.name]["secret"])
2298
2299
client_dict = {}
2300
2301
# A list of attributes that will not be stored when shuting down.
2302
exclude = set(("bus", "changedstate", "secret"))
2303
for name, typ in inspect.getmembers(dbus.service.Object):
2304
exclude.add(name)
2305
2306
client_dict["encrypted_secret"] = client.encrypted_secret
2307
for attr in client.client_structure:
2308
if attr not in exclude:
2309
client_dict[attr] = getattr(client, attr)
2310
2311
clients.append(client_dict)
2312
del client_settings[client.name]["secret"]
2313
2314
try:
2315
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2316
pickle.dump((clients, client_settings), stored_state)
2317
except IOError as e:
2318
logger.warning("Could not save persistant state: {0}".format(e))
2319
if e.errno != errno.ENOENT:
2320
raise
2321
2322
# Delete all clients, and settings from config
2323
while tcp_server.clients:
2324
name, client = tcp_server.clients.popitem()
2325
if use_dbus:
2326
client.remove_from_connection()
2327
# Don't signal anything except ClientRemoved
2328
client.disable(quiet=True)
2329
if use_dbus:
2330
# Emit D-Bus signal
2331
mandos_dbus_service.ClientRemoved(client
2332
.dbus_object_path,
2333
client.name)
2334
client_settings.clear()
656
for client in clients:
657
client.stop_hook = None
658
client.stop()
2335
659
2336
660
atexit.register(cleanup)
2337
661
2338
for client in tcp_server.clients.itervalues():
2339
if use_dbus:
2340
# Emit D-Bus signal
2341
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2342
# Need to initiate checking of clients
2343
if client.enabled:
2344
client.init_checker()
2345
2346
2347
tcp_server.enable()
2348
tcp_server.server_activate()
2349
2350
# Find out what port we got
2351
service.port = tcp_server.socket.getsockname()[1]
2352
if use_ipv6:
2353
logger.info("Now listening on address %r, port %d,"
2354
" flowinfo %d, scope_id %d"
2355
% tcp_server.socket.getsockname())
2356
else: # IPv4
2357
logger.info("Now listening on address %r, port %d"
2358
% tcp_server.socket.getsockname())
2359
2360
#service.interface = tcp_server.socket.getsockname()[3]
2361
2362
try:
2363
# From the Avahi example code
2364
try:
2365
service.activate()
2366
except dbus.exceptions.DBusException as error:
2367
logger.critical("DBusException: %s", error)
2368
cleanup()
2369
sys.exit(1)
2370
# End of Avahi example code
2371
2372
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2373
lambda *args, **kwargs:
2374
(tcp_server.handle_request
2375
(*args[2:], **kwargs) or True))
2376
2377
logger.debug("Starting main loop")
662
if not debug:
663
signal.signal(signal.SIGINT, signal.SIG_IGN)
664
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
665
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
666
667
for client in clients:
668
client.start()
669
670
tcp_server = IPv6_TCPServer((None, options.port),
671
tcp_handler,
672
options=options,
673
clients=clients)
674
# Find out what random port we got
675
servicePort = tcp_server.socket.getsockname()[1]
676
logger.debug(u"Now listening on port %d", servicePort)
677
678
if options.interface is not None:
679
serviceInterface = if_nametoindex(options.interface)
680
681
# From the Avahi server example code
682
server.connect_to_signal("StateChanged", server_state_changed)
683
try:
684
server_state_changed(server.GetState())
685
except dbus.exceptions.DBusException, error:
686
logger.critical(u"DBusException: %s", error)
687
killme(1)
688
# End of Avahi example code
689
690
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
691
lambda *args, **kwargs:
692
tcp_server.handle_request(*args[2:],
693
**kwargs) or True)
694
try:
695
main_loop_started = True
2378
696
main_loop.run()
2379
except AvahiError as error:
2380
logger.critical("AvahiError: %s", error)
2381
cleanup()
2382
sys.exit(1)
2383
697
except KeyboardInterrupt:
2384
698
if debug:
2385
print("", file=sys.stderr)
2386
logger.debug("Server received KeyboardInterrupt")
2387
logger.debug("Server exiting")
2388
# Must run before the D-Bus bus name gets deregistered
2389
cleanup()
2390
2391
2392
if __name__ == '__main__':
2393
main()
699
print
700
701
sys.exit(exitstatus)
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0