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- Committer: Teddy Hogeborn
- Date: 2008-10-03 09:32:30 UTC
- Revision ID: teddy@fukt.bsnet.se-20081003093230-rshn19e0c19zz12i
* .bzrignore (plugins.d/askpass-fifo): Added.
* Makefile (FORTIFY): Added "-fstack-protector-all".
(mandos, mandos-keygen): Use more strict regexps when updating the
version number.
* mandos (Client.__init__): Use os.path.expandvars() and
os.path.expanduser() on the "secfile"
config value.
* plugins.d/splashy.c: Update comments and order of #include's.
(main): Check user and group when looking for running splashy
process. Do not ignore ENOENT from execl(). Use _exit()
instead of "return" when an error happens in child
processes. Bug fix: Only wait for splashy_update
completion if it was started. Bug fix: detect failing
waitpid(). Only kill splashy_update if it is running. Do
the killing of the old splashy process before the fork().
Do setsid() and setuid(geteuid()) before starting the new
splashy. Report failing execl().
* plugins.d/usplash.c: Update comments and order of #include's.
(main): Check user and group when looking for running usplash
process. Do not report execv() error if interrupted by a
signal.
* Makefile (FORTIFY): Added "-fstack-protector-all".
(mandos, mandos-keygen): Use more strict regexps when updating the
version number.
* mandos (Client.__init__): Use os.path.expandvars() and
os.path.expanduser() on the "secfile"
config value.
* plugins.d/splashy.c: Update comments and order of #include's.
(main): Check user and group when looking for running splashy
process. Do not ignore ENOENT from execl(). Use _exit()
instead of "return" when an error happens in child
processes. Bug fix: Only wait for splashy_update
completion if it was started. Bug fix: detect failing
waitpid(). Only kill splashy_update if it is running. Do
the killing of the old splashy process before the fork().
Do setsid() and setuid(geteuid()) before starting the new
splashy. Report failing execl().
* plugins.d/usplash.c: Update comments and order of #include's.
(main): Check user and group when looking for running usplash
process. Do not report execv() error if interrupted by a
signal.
- files added:
- debian/mandos-client.config
- files removed:
- NEWS
- files modified:
- INSTALL
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
37
36
import socket
38
import optparse
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
43
import gnutls.library.functions
45
44
import gnutls.library.constants
46
45
import gnutls.library.types
47
import ConfigParser as configparser
46
import ConfigParser
48
47
import sys
49
48
import re
50
49
import os
51
50
import signal
51
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
import logging
56
56
import logging.handlers
57
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
58
64
59
import dbus
65
import dbus.service
66
60
import gobject
67
61
import avahi
68
62
from dbus.mainloop.glib import DBusGMainLoop
69
63
import ctypes
70
64
import ctypes.util
71
import xml.dom.minidom
72
import inspect
73
74
try:
75
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
76
except AttributeError:
77
try:
78
from IN import SO_BINDTODEVICE
79
except ImportError:
80
SO_BINDTODEVICE = None
81
82
83
version = "1.0.14"
84
85
logger = logging.Logger(u'mandos')
86
syslogger = (logging.handlers.SysLogHandler
87
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
88
address = "/dev/log"))
89
syslogger.setFormatter(logging.Formatter
90
(u'Mandos [%(process)d]: %(levelname)s:'
91
u' %(message)s'))
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
92
74
logger.addHandler(syslogger)
93
75
94
76
console = logging.StreamHandler()
95
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
96
u' %(levelname)s:'
97
u' %(message)s'))
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
98
79
logger.addHandler(console)
99
80
100
81
class AvahiError(Exception):
101
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
102
83
self.value = value
103
super(AvahiError, self).__init__(value, *args, **kwargs)
104
def __unicode__(self):
105
return unicode(repr(self.value))
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
106
87
107
88
class AvahiServiceError(AvahiError):
108
89
pass
113
94
114
95
class AvahiService(object):
115
96
"""An Avahi (Zeroconf) service.
116
117
97
Attributes:
118
98
interface: integer; avahi.IF_UNSPEC or an interface index.
119
99
Used to optionally bind to the specified interface.
120
name: string; Example: u'Mandos'
121
type: string; Example: u'_mandos._tcp'.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
122
102
See <http://www.dns-sd.org/ServiceTypes.html>
123
103
port: integer; what port to announce
124
104
TXT: list of strings; TXT record for the service
127
107
max_renames: integer; maximum number of renames
128
108
rename_count: integer; counter so we only rename after collisions
129
109
a sensible number of times
130
group: D-Bus Entry Group
131
server: D-Bus Server
132
bus: dbus.SystemBus()
133
110
"""
134
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
135
servicetype = None, port = None, TXT = None,
136
domain = u"", host = u"", max_renames = 32768,
137
protocol = avahi.PROTO_UNSPEC, bus = None):
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
138
114
self.interface = interface
139
115
self.name = name
140
116
self.type = servicetype
141
117
self.port = port
142
self.TXT = TXT if TXT is not None else []
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
143
122
self.domain = domain
144
123
self.host = host
145
124
self.rename_count = 0
146
125
self.max_renames = max_renames
147
self.protocol = protocol
148
self.group = None # our entry group
149
self.server = None
150
self.bus = bus
151
126
def rename(self):
152
127
"""Derived from the Avahi example code"""
153
128
if self.rename_count >= self.max_renames:
154
129
logger.critical(u"No suitable Zeroconf service name found"
155
130
u" after %i retries, exiting.",
156
131
self.rename_count)
157
raise AvahiServiceError(u"Too many renames")
158
self.name = self.server.GetAlternativeServiceName(self.name)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
159
134
logger.info(u"Changing Zeroconf service name to %r ...",
160
unicode(self.name))
161
syslogger.setFormatter(logging.Formatter
162
(u'Mandos (%s) [%%(process)d]:'
163
u' %%(levelname)s: %%(message)s'
164
% self.name))
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
165
139
self.remove()
166
140
self.add()
167
141
self.rename_count += 1
168
142
def remove(self):
169
143
"""Derived from the Avahi example code"""
170
if self.group is not None:
171
self.group.Reset()
144
if group is not None:
145
group.Reset()
172
146
def add(self):
173
147
"""Derived from the Avahi example code"""
174
if self.group is None:
175
self.group = dbus.Interface(
176
self.bus.get_object(avahi.DBUS_NAME,
177
self.server.EntryGroupNew()),
178
avahi.DBUS_INTERFACE_ENTRY_GROUP)
179
self.group.connect_to_signal('StateChanged',
180
self
181
.entry_group_state_changed)
148
global group
149
if group is None:
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
182
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
183
self.name, self.type)
184
self.group.AddService(
185
self.interface,
186
self.protocol,
187
dbus.UInt32(0), # flags
188
self.name, self.type,
189
self.domain, self.host,
190
dbus.UInt16(self.port),
191
avahi.string_array_to_txt_array(self.TXT))
192
self.group.Commit()
193
def entry_group_state_changed(self, state, error):
194
"""Derived from the Avahi example code"""
195
logger.debug(u"Avahi state change: %i", state)
196
197
if state == avahi.ENTRY_GROUP_ESTABLISHED:
198
logger.debug(u"Zeroconf service established.")
199
elif state == avahi.ENTRY_GROUP_COLLISION:
200
logger.warning(u"Zeroconf service name collision.")
201
self.rename()
202
elif state == avahi.ENTRY_GROUP_FAILURE:
203
logger.critical(u"Avahi: Error in group state changed %s",
204
unicode(error))
205
raise AvahiGroupError(u"State changed: %s"
206
% unicode(error))
207
def cleanup(self):
208
"""Derived from the Avahi example code"""
209
if self.group is not None:
210
self.group.Free()
211
self.group = None
212
def server_state_changed(self, state):
213
"""Derived from the Avahi example code"""
214
if state == avahi.SERVER_COLLISION:
215
logger.error(u"Zeroconf server name collision")
216
self.remove()
217
elif state == avahi.SERVER_RUNNING:
218
self.add()
219
def activate(self):
220
"""Derived from the Avahi example code"""
221
if self.server is None:
222
self.server = dbus.Interface(
223
self.bus.get_object(avahi.DBUS_NAME,
224
avahi.DBUS_PATH_SERVER),
225
avahi.DBUS_INTERFACE_SERVER)
226
self.server.connect_to_signal(u"StateChanged",
227
self.server_state_changed)
228
self.server_state_changed(self.server.GetState())
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
229
171
230
172
231
173
class Client(object):
232
174
"""A representation of a client host served by this server.
233
234
175
Attributes:
235
name: string; from the config file, used in log messages and
236
D-Bus identifiers
176
name: string; from the config file, used in log messages
237
177
fingerprint: string (40 or 32 hexadecimal digits); used to
238
178
uniquely identify the client
239
secret: bytestring; sent verbatim (over TLS) to client
240
host: string; available for use by the checker command
241
created: datetime.datetime(); (UTC) object creation
242
last_enabled: datetime.datetime(); (UTC)
243
enabled: bool()
244
last_checked_ok: datetime.datetime(); (UTC) or None
245
timeout: datetime.timedelta(); How long from last_checked_ok
246
until this client is disabled
247
interval: datetime.timedelta(); How often to start a new checker
248
disable_hook: If set, called by disable() as disable_hook(self)
249
checker: subprocess.Popen(); a running checker process used
250
to see if the client lives.
251
'None' if no process is running.
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
185
interval: datetime.timedelta(); How often to start a new checker
186
stop_hook: If set, called by stop() as stop_hook(self)
187
checker: subprocess.Popen(); a running checker process used
188
to see if the client lives.
189
'None' if no process is running.
252
190
checker_initiator_tag: a gobject event source tag, or None
253
disable_initiator_tag: - '' -
191
stop_initiator_tag: - '' -
254
192
checker_callback_tag: - '' -
255
193
checker_command: string; External command which is run to check if
256
194
client lives. %() expansions are done at
257
195
runtime with vars(self) as dict, so that for
258
196
instance %(name)s can be used in the command.
259
current_checker_command: string; current running checker_command
260
changesignal: File descriptor; written to on object change
261
_reset: File descriptor; for flushing changesignal
262
delay: datetime.timedelta(); how long to wait for approval/secret
263
approved: bool(); None if not yet approved/disapproved
197
Private attibutes:
198
_timeout: Real variable for 'timeout'
199
_interval: Real variable for 'interval'
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
201
_interval_milliseconds: - '' -
264
202
"""
265
266
@staticmethod
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
273
def timeout_milliseconds(self):
274
"Return the 'timeout' attribute in milliseconds"
275
return self._timedelta_to_milliseconds(self.timeout)
276
277
def interval_milliseconds(self):
278
"Return the 'interval' attribute in milliseconds"
279
return self._timedelta_to_milliseconds(self.interval)
280
281
def __init__(self, name = None, disable_hook=None, config=None):
203
def _set_timeout(self, timeout):
204
"Setter function for 'timeout' attribute"
205
self._timeout = timeout
206
self._timeout_milliseconds = ((self.timeout.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.timeout.seconds * 1000)
209
+ (self.timeout.microseconds
210
// 1000))
211
timeout = property(lambda self: self._timeout,
212
_set_timeout)
213
del _set_timeout
214
def _set_interval(self, interval):
215
"Setter function for 'interval' attribute"
216
self._interval = interval
217
self._interval_milliseconds = ((self.interval.days
218
* 24 * 60 * 60 * 1000)
219
+ (self.interval.seconds
220
* 1000)
221
+ (self.interval.microseconds
222
// 1000))
223
interval = property(lambda self: self._interval,
224
_set_interval)
225
del _set_interval
226
def __init__(self, name = None, stop_hook=None, config=None):
282
227
"""Note: the 'checker' key in 'config' sets the
283
228
'checker_command' attribute and *not* the 'checker'
284
229
attribute."""
285
self.name = name
286
230
if config is None:
287
231
config = {}
232
self.name = name
288
233
logger.debug(u"Creating client %r", self.name)
289
234
# Uppercase and remove spaces from fingerprint for later
290
235
# comparison purposes with return value from the fingerprint()
291
236
# function
292
self.fingerprint = (config[u"fingerprint"].upper()
293
.replace(u" ", u""))
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
294
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
295
if u"secret" in config:
296
self._secret = config[u"secret"].decode(u"base64")
297
elif u"secfile" in config:
298
with open(os.path.expanduser(os.path.expandvars
299
(config[u"secfile"])),
300
"rb") as secfile:
301
self._secret = secfile.read()
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(os.path.expanduser(os.path.expandvars
244
(config["secfile"])))
245
self.secret = secfile.read()
246
secfile.close()
302
247
else:
303
#XXX Need to allow secret on demand!
304
248
raise TypeError(u"No secret or secfile for client %s"
305
249
% self.name)
306
self.host = config.get(u"host", u"")
307
self.created = datetime.datetime.utcnow()
308
self.enabled = False
309
self.last_enabled = None
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.now()
310
252
self.last_checked_ok = None
311
self.timeout = string_to_delta(config[u"timeout"])
312
self.interval = string_to_delta(config[u"interval"])
313
self.disable_hook = disable_hook
253
self.timeout = string_to_delta(config["timeout"])
254
self.interval = string_to_delta(config["interval"])
255
self.stop_hook = stop_hook
314
256
self.checker = None
315
257
self.checker_initiator_tag = None
316
self.disable_initiator_tag = None
258
self.stop_initiator_tag = None
317
259
self.checker_callback_tag = None
318
self.checker_command = config[u"checker"]
319
self.current_checker_command = None
320
self.last_connect = None
321
self.changesignal, self._reset = os.pipe()
322
self._approved = None #XXX should be based on configfile
323
self.delay = 10; #XXX Should be based on configfile
324
325
def setsecret(self, value):
326
self._secret = value
327
os.write(self.changesignal, "\0")
328
os.read(self._reset, 1)
329
330
secret = property(lambda self: self._secret, setsecret)
331
del setsecret
332
333
def setapproved(self, value):
334
self._approved = value
335
os.write(self.changesignal, "\0")
336
os.read(self._reset, 1)
337
338
approved = property(lambda self: self._approved, setapproved)
339
del setapproved
340
341
def enable(self):
260
self.check_command = config["checker"]
261
def start(self):
342
262
"""Start this client's checker and timeout hooks"""
343
if getattr(self, u"enabled", False):
344
# Already enabled
345
return
346
self.last_enabled = datetime.datetime.utcnow()
347
263
# Schedule a new checker to be started an 'interval' from now,
348
264
# and every interval from then on.
349
self.checker_initiator_tag = (gobject.timeout_add
350
(self.interval_milliseconds(),
351
self.start_checker))
352
# Schedule a disable() when 'timeout' has passed
353
self.disable_initiator_tag = (gobject.timeout_add
354
(self.timeout_milliseconds(),
355
self.disable))
356
self.enabled = True
265
self.checker_initiator_tag = gobject.timeout_add\
266
(self._interval_milliseconds,
267
self.start_checker)
357
268
# Also start a new checker *right now*.
358
269
self.start_checker()
359
360
def disable(self, quiet=True):
361
"""Disable this client."""
362
if not getattr(self, "enabled", False):
270
# Schedule a stop() when 'timeout' has passed
271
self.stop_initiator_tag = gobject.timeout_add\
272
(self._timeout_milliseconds,
273
self.stop)
274
def stop(self):
275
"""Stop this client.
276
The possibility that a client might be restarted is left open,
277
but not currently used."""
278
# If this client doesn't have a secret, it is already stopped.
279
if hasattr(self, "secret") and self.secret:
280
logger.info(u"Stopping client %s", self.name)
281
self.secret = None
282
else:
363
283
return False
364
if not quiet:
365
logger.info(u"Disabling client %s", self.name)
366
if getattr(self, u"disable_initiator_tag", False):
367
gobject.source_remove(self.disable_initiator_tag)
368
self.disable_initiator_tag = None
369
if getattr(self, u"checker_initiator_tag", False):
284
if getattr(self, "stop_initiator_tag", False):
285
gobject.source_remove(self.stop_initiator_tag)
286
self.stop_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
370
288
gobject.source_remove(self.checker_initiator_tag)
371
289
self.checker_initiator_tag = None
372
290
self.stop_checker()
373
if self.disable_hook:
374
self.disable_hook(self)
375
self.enabled = False
291
if self.stop_hook:
292
self.stop_hook(self)
376
293
# Do not run this again if called by a gobject.timeout_add
377
294
return False
378
379
295
def __del__(self):
380
self.disable_hook = None
381
self.disable()
382
383
def checker_callback(self, pid, condition, command):
296
self.stop_hook = None
297
self.stop()
298
def checker_callback(self, pid, condition):
384
299
"""The checker has completed, so take appropriate actions."""
300
now = datetime.datetime.now()
385
301
self.checker_callback_tag = None
386
302
self.checker = None
387
if os.WIFEXITED(condition):
388
exitstatus = os.WEXITSTATUS(condition)
389
if exitstatus == 0:
390
logger.info(u"Checker for %(name)s succeeded",
391
vars(self))
392
self.checked_ok()
393
else:
394
logger.info(u"Checker for %(name)s failed",
395
vars(self))
396
else:
303
if os.WIFEXITED(condition) \
304
and (os.WEXITSTATUS(condition) == 0):
305
logger.info(u"Checker for %(name)s succeeded",
306
vars(self))
307
self.last_checked_ok = now
308
gobject.source_remove(self.stop_initiator_tag)
309
self.stop_initiator_tag = gobject.timeout_add\
310
(self._timeout_milliseconds,
311
self.stop)
312
elif not os.WIFEXITED(condition):
397
313
logger.warning(u"Checker for %(name)s crashed?",
398
314
vars(self))
399
400
def checked_ok(self):
401
"""Bump up the timeout for this client.
402
403
This should only be called when the client has been seen,
404
alive and well.
405
"""
406
self.last_checked_ok = datetime.datetime.utcnow()
407
gobject.source_remove(self.disable_initiator_tag)
408
self.disable_initiator_tag = (gobject.timeout_add
409
(self.timeout_milliseconds(),
410
self.disable))
411
315
else:
316
logger.info(u"Checker for %(name)s failed",
317
vars(self))
412
318
def start_checker(self):
413
319
"""Start a new checker subprocess if one is not running.
414
415
320
If a checker already exists, leave it running and do
416
321
nothing."""
417
322
# The reason for not killing a running checker is that if we
420
325
# client would inevitably timeout, since no checker would get
421
326
# a chance to run to completion. If we instead leave running
422
327
# checkers alone, the checker would have to take more time
423
# than 'timeout' for the client to be disabled, which is as it
424
# should be.
425
426
# If a checker exists, make sure it is not a zombie
427
try:
428
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
429
except (AttributeError, OSError), error:
430
if (isinstance(error, OSError)
431
and error.errno != errno.ECHILD):
432
raise error
433
else:
434
if pid:
435
logger.warning(u"Checker was a zombie")
436
gobject.source_remove(self.checker_callback_tag)
437
self.checker_callback(pid, status,
438
self.current_checker_command)
439
# Start a new checker if needed
328
# than 'timeout' for the client to be declared invalid, which
329
# is as it should be.
440
330
if self.checker is None:
441
331
try:
442
# In case checker_command has exactly one % operator
443
command = self.checker_command % self.host
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
444
334
except TypeError:
445
335
# Escape attributes for the shell
446
escaped_attrs = dict((key,
447
re.escape(unicode(str(val),
448
errors=
449
u'replace')))
336
escaped_attrs = dict((key, re.escape(str(val)))
450
337
for key, val in
451
338
vars(self).iteritems())
452
339
try:
453
command = self.checker_command % escaped_attrs
340
command = self.check_command % escaped_attrs
454
341
except TypeError, error:
455
342
logger.error(u'Could not format string "%s":'
456
u' %s', self.checker_command, error)
343
u' %s', self.check_command, error)
457
344
return True # Try again later
458
self.current_checker_command = command
459
345
try:
460
346
logger.info(u"Starting checker %r for %s",
461
347
command, self.name)
465
351
# always replaced by /dev/null.)
466
352
self.checker = subprocess.Popen(command,
467
353
close_fds=True,
468
shell=True, cwd=u"/")
469
self.checker_callback_tag = (gobject.child_watch_add
470
(self.checker.pid,
471
self.checker_callback,
472
data=command))
473
# The checker may have completed before the gobject
474
# watch was added. Check for this.
475
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
476
if pid:
477
gobject.source_remove(self.checker_callback_tag)
478
self.checker_callback(pid, status, command)
354
shell=True, cwd="/")
355
self.checker_callback_tag = gobject.child_watch_add\
356
(self.checker.pid,
357
self.checker_callback)
479
358
except OSError, error:
480
359
logger.error(u"Failed to start subprocess: %s",
481
360
error)
482
361
# Re-run this periodically if run by gobject.timeout_add
483
362
return True
484
485
363
def stop_checker(self):
486
364
"""Force the checker process, if any, to stop."""
487
365
if self.checker_callback_tag:
488
366
gobject.source_remove(self.checker_callback_tag)
489
367
self.checker_callback_tag = None
490
if getattr(self, u"checker", None) is None:
368
if getattr(self, "checker", None) is None:
491
369
return
492
370
logger.debug(u"Stopping checker for %(name)s", vars(self))
493
371
try:
494
372
os.kill(self.checker.pid, signal.SIGTERM)
495
#time.sleep(0.5)
373
#os.sleep(0.5)
496
374
#if self.checker.poll() is None:
497
375
# os.kill(self.checker.pid, signal.SIGKILL)
498
376
except OSError, error:
499
377
if error.errno != errno.ESRCH: # No such process
500
378
raise
501
379
self.checker = None
502
503
504
def dbus_service_property(dbus_interface, signature=u"v",
505
access=u"readwrite", byte_arrays=False):
506
"""Decorators for marking methods of a DBusObjectWithProperties to
507
become properties on the D-Bus.
508
509
The decorated method will be called with no arguments by "Get"
510
and with one argument by "Set".
511
512
The parameters, where they are supported, are the same as
513
dbus.service.method, except there is only "signature", since the
514
type from Get() and the type sent to Set() is the same.
515
"""
516
# Encoding deeply encoded byte arrays is not supported yet by the
517
# "Set" method, so we fail early here:
518
if byte_arrays and signature != u"ay":
519
raise ValueError(u"Byte arrays not supported for non-'ay'"
520
u" signature %r" % signature)
521
def decorator(func):
522
func._dbus_is_property = True
523
func._dbus_interface = dbus_interface
524
func._dbus_signature = signature
525
func._dbus_access = access
526
func._dbus_name = func.__name__
527
if func._dbus_name.endswith(u"_dbus_property"):
528
func._dbus_name = func._dbus_name[:-14]
529
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
530
return func
531
return decorator
532
533
534
class DBusPropertyException(dbus.exceptions.DBusException):
535
"""A base class for D-Bus property-related exceptions
536
"""
537
def __unicode__(self):
538
return unicode(str(self))
539
540
541
class DBusPropertyAccessException(DBusPropertyException):
542
"""A property's access permissions disallows an operation.
543
"""
544
pass
545
546
547
class DBusPropertyNotFound(DBusPropertyException):
548
"""An attempt was made to access a non-existing property.
549
"""
550
pass
551
552
553
class DBusObjectWithProperties(dbus.service.Object):
554
"""A D-Bus object with properties.
555
556
Classes inheriting from this can use the dbus_service_property
557
decorator to expose methods as D-Bus properties. It exposes the
558
standard Get(), Set(), and GetAll() methods on the D-Bus.
559
"""
560
561
@staticmethod
562
def _is_dbus_property(obj):
563
return getattr(obj, u"_dbus_is_property", False)
564
565
def _get_all_dbus_properties(self):
566
"""Returns a generator of (name, attribute) pairs
567
"""
568
return ((prop._dbus_name, prop)
569
for name, prop in
570
inspect.getmembers(self, self._is_dbus_property))
571
572
def _get_dbus_property(self, interface_name, property_name):
573
"""Returns a bound method if one exists which is a D-Bus
574
property with the specified name and interface.
575
"""
576
for name in (property_name,
577
property_name + u"_dbus_property"):
578
prop = getattr(self, name, None)
579
if (prop is None
580
or not self._is_dbus_property(prop)
581
or prop._dbus_name != property_name
582
or (interface_name and prop._dbus_interface
583
and interface_name != prop._dbus_interface)):
584
continue
585
return prop
586
# No such property
587
raise DBusPropertyNotFound(self.dbus_object_path + u":"
588
+ interface_name + u"."
589
+ property_name)
590
591
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
592
out_signature=u"v")
593
def Get(self, interface_name, property_name):
594
"""Standard D-Bus property Get() method, see D-Bus standard.
595
"""
596
prop = self._get_dbus_property(interface_name, property_name)
597
if prop._dbus_access == u"write":
598
raise DBusPropertyAccessException(property_name)
599
value = prop()
600
if not hasattr(value, u"variant_level"):
601
return value
602
return type(value)(value, variant_level=value.variant_level+1)
603
604
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
605
def Set(self, interface_name, property_name, value):
606
"""Standard D-Bus property Set() method, see D-Bus standard.
607
"""
608
prop = self._get_dbus_property(interface_name, property_name)
609
if prop._dbus_access == u"read":
610
raise DBusPropertyAccessException(property_name)
611
if prop._dbus_get_args_options[u"byte_arrays"]:
612
# The byte_arrays option is not supported yet on
613
# signatures other than "ay".
614
if prop._dbus_signature != u"ay":
615
raise ValueError
616
value = dbus.ByteArray(''.join(unichr(byte)
617
for byte in value))
618
prop(value)
619
620
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
621
out_signature=u"a{sv}")
622
def GetAll(self, interface_name):
623
"""Standard D-Bus property GetAll() method, see D-Bus
624
standard.
625
626
Note: Will not include properties with access="write".
627
"""
628
all = {}
629
for name, prop in self._get_all_dbus_properties():
630
if (interface_name
631
and interface_name != prop._dbus_interface):
632
# Interface non-empty but did not match
633
continue
634
# Ignore write-only properties
635
if prop._dbus_access == u"write":
636
continue
637
value = prop()
638
if not hasattr(value, u"variant_level"):
639
all[name] = value
640
continue
641
all[name] = type(value)(value, variant_level=
642
value.variant_level+1)
643
return dbus.Dictionary(all, signature=u"sv")
644
645
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
646
out_signature=u"s",
647
path_keyword='object_path',
648
connection_keyword='connection')
649
def Introspect(self, object_path, connection):
650
"""Standard D-Bus method, overloaded to insert property tags.
651
"""
652
xmlstring = dbus.service.Object.Introspect(self, object_path,
653
connection)
654
try:
655
document = xml.dom.minidom.parseString(xmlstring)
656
def make_tag(document, name, prop):
657
e = document.createElement(u"property")
658
e.setAttribute(u"name", name)
659
e.setAttribute(u"type", prop._dbus_signature)
660
e.setAttribute(u"access", prop._dbus_access)
661
return e
662
for if_tag in document.getElementsByTagName(u"interface"):
663
for tag in (make_tag(document, name, prop)
664
for name, prop
665
in self._get_all_dbus_properties()
666
if prop._dbus_interface
667
== if_tag.getAttribute(u"name")):
668
if_tag.appendChild(tag)
669
# Add the names to the return values for the
670
# "org.freedesktop.DBus.Properties" methods
671
if (if_tag.getAttribute(u"name")
672
== u"org.freedesktop.DBus.Properties"):
673
for cn in if_tag.getElementsByTagName(u"method"):
674
if cn.getAttribute(u"name") == u"Get":
675
for arg in cn.getElementsByTagName(u"arg"):
676
if (arg.getAttribute(u"direction")
677
== u"out"):
678
arg.setAttribute(u"name", u"value")
679
elif cn.getAttribute(u"name") == u"GetAll":
680
for arg in cn.getElementsByTagName(u"arg"):
681
if (arg.getAttribute(u"direction")
682
== u"out"):
683
arg.setAttribute(u"name", u"props")
684
xmlstring = document.toxml(u"utf-8")
685
document.unlink()
686
except (AttributeError, xml.dom.DOMException,
687
xml.parsers.expat.ExpatError), error:
688
logger.error(u"Failed to override Introspection method",
689
error)
690
return xmlstring
691
692
693
class ClientDBus(Client, DBusObjectWithProperties):
694
"""A Client class using D-Bus
695
696
Attributes:
697
dbus_object_path: dbus.ObjectPath
698
bus: dbus.SystemBus()
699
"""
700
# dbus.service.Object doesn't use super(), so we can't either.
701
702
def __init__(self, bus = None, *args, **kwargs):
703
self.bus = bus
704
Client.__init__(self, *args, **kwargs)
705
# Only now, when this client is initialized, can it show up on
706
# the D-Bus
707
self.dbus_object_path = (dbus.ObjectPath
708
(u"/clients/"
709
+ self.name.replace(u".", u"_")))
710
DBusObjectWithProperties.__init__(self, self.bus,
711
self.dbus_object_path)
712
713
@staticmethod
714
def _datetime_to_dbus(dt, variant_level=0):
715
"""Convert a UTC datetime.datetime() to a D-Bus type."""
716
return dbus.String(dt.isoformat(),
717
variant_level=variant_level)
718
719
def enable(self):
720
oldstate = getattr(self, u"enabled", False)
721
r = Client.enable(self)
722
if oldstate != self.enabled:
723
# Emit D-Bus signals
724
self.PropertyChanged(dbus.String(u"enabled"),
725
dbus.Boolean(True, variant_level=1))
726
self.PropertyChanged(
727
dbus.String(u"last_enabled"),
728
self._datetime_to_dbus(self.last_enabled,
729
variant_level=1))
730
return r
731
732
def disable(self, quiet = False):
733
oldstate = getattr(self, u"enabled", False)
734
r = Client.disable(self, quiet=quiet)
735
if not quiet and oldstate != self.enabled:
736
# Emit D-Bus signal
737
self.PropertyChanged(dbus.String(u"enabled"),
738
dbus.Boolean(False, variant_level=1))
739
return r
740
741
def __del__(self, *args, **kwargs):
742
try:
743
self.remove_from_connection()
744
except LookupError:
745
pass
746
if hasattr(DBusObjectWithProperties, u"__del__"):
747
DBusObjectWithProperties.__del__(self, *args, **kwargs)
748
Client.__del__(self, *args, **kwargs)
749
750
def checker_callback(self, pid, condition, command,
751
*args, **kwargs):
752
self.checker_callback_tag = None
753
self.checker = None
754
# Emit D-Bus signal
755
self.PropertyChanged(dbus.String(u"checker_running"),
756
dbus.Boolean(False, variant_level=1))
757
if os.WIFEXITED(condition):
758
exitstatus = os.WEXITSTATUS(condition)
759
# Emit D-Bus signal
760
self.CheckerCompleted(dbus.Int16(exitstatus),
761
dbus.Int64(condition),
762
dbus.String(command))
763
else:
764
# Emit D-Bus signal
765
self.CheckerCompleted(dbus.Int16(-1),
766
dbus.Int64(condition),
767
dbus.String(command))
768
769
return Client.checker_callback(self, pid, condition, command,
770
*args, **kwargs)
771
772
def checked_ok(self, *args, **kwargs):
773
r = Client.checked_ok(self, *args, **kwargs)
774
# Emit D-Bus signal
775
self.PropertyChanged(
776
dbus.String(u"last_checked_ok"),
777
(self._datetime_to_dbus(self.last_checked_ok,
778
variant_level=1)))
779
return r
780
781
def start_checker(self, *args, **kwargs):
782
old_checker = self.checker
783
if self.checker is not None:
784
old_checker_pid = self.checker.pid
785
else:
786
old_checker_pid = None
787
r = Client.start_checker(self, *args, **kwargs)
788
# Only if new checker process was started
789
if (self.checker is not None
790
and old_checker_pid != self.checker.pid):
791
# Emit D-Bus signal
792
self.CheckerStarted(self.current_checker_command)
793
self.PropertyChanged(
794
dbus.String(u"checker_running"),
795
dbus.Boolean(True, variant_level=1))
796
return r
797
798
def stop_checker(self, *args, **kwargs):
799
old_checker = getattr(self, u"checker", None)
800
r = Client.stop_checker(self, *args, **kwargs)
801
if (old_checker is not None
802
and getattr(self, u"checker", None) is None):
803
self.PropertyChanged(dbus.String(u"checker_running"),
804
dbus.Boolean(False, variant_level=1))
805
return r
806
807
## D-Bus methods, signals & properties
808
_interface = u"se.bsnet.fukt.Mandos.Client"
809
810
## Signals
811
812
# CheckerCompleted - signal
813
@dbus.service.signal(_interface, signature=u"nxs")
814
def CheckerCompleted(self, exitcode, waitstatus, command):
815
"D-Bus signal"
816
pass
817
818
# CheckerStarted - signal
819
@dbus.service.signal(_interface, signature=u"s")
820
def CheckerStarted(self, command):
821
"D-Bus signal"
822
pass
823
824
# PropertyChanged - signal
825
@dbus.service.signal(_interface, signature=u"sv")
826
def PropertyChanged(self, property, value):
827
"D-Bus signal"
828
pass
829
830
# GotSecret - signal
831
@dbus.service.signal(_interface)
832
def GotSecret(self):
833
"D-Bus signal"
834
pass
835
836
# Rejected - signal
837
@dbus.service.signal(_interface)
838
def Rejected(self):
839
"D-Bus signal"
840
pass
841
842
## Methods
843
844
# CheckedOK - method
845
@dbus.service.method(_interface)
846
def CheckedOK(self):
847
return self.checked_ok()
848
849
# Enable - method
850
@dbus.service.method(_interface)
851
def Enable(self):
852
"D-Bus method"
853
self.enable()
854
855
# StartChecker - method
856
@dbus.service.method(_interface)
857
def StartChecker(self):
858
"D-Bus method"
859
self.start_checker()
860
861
# Disable - method
862
@dbus.service.method(_interface)
863
def Disable(self):
864
"D-Bus method"
865
self.disable()
866
867
# StopChecker - method
868
@dbus.service.method(_interface)
869
def StopChecker(self):
870
self.stop_checker()
871
872
## Properties
873
874
# name - property
875
@dbus_service_property(_interface, signature=u"s", access=u"read")
876
def name_dbus_property(self):
877
return dbus.String(self.name)
878
879
# fingerprint - property
880
@dbus_service_property(_interface, signature=u"s", access=u"read")
881
def fingerprint_dbus_property(self):
882
return dbus.String(self.fingerprint)
883
884
# host - property
885
@dbus_service_property(_interface, signature=u"s",
886
access=u"readwrite")
887
def host_dbus_property(self, value=None):
888
if value is None: # get
889
return dbus.String(self.host)
890
self.host = value
891
# Emit D-Bus signal
892
self.PropertyChanged(dbus.String(u"host"),
893
dbus.String(value, variant_level=1))
894
895
# created - property
896
@dbus_service_property(_interface, signature=u"s", access=u"read")
897
def created_dbus_property(self):
898
return dbus.String(self._datetime_to_dbus(self.created))
899
900
# last_enabled - property
901
@dbus_service_property(_interface, signature=u"s", access=u"read")
902
def last_enabled_dbus_property(self):
903
if self.last_enabled is None:
904
return dbus.String(u"")
905
return dbus.String(self._datetime_to_dbus(self.last_enabled))
906
907
# enabled - property
908
@dbus_service_property(_interface, signature=u"b",
909
access=u"readwrite")
910
def enabled_dbus_property(self, value=None):
911
if value is None: # get
912
return dbus.Boolean(self.enabled)
913
if value:
914
self.enable()
915
else:
916
self.disable()
917
918
# last_checked_ok - property
919
@dbus_service_property(_interface, signature=u"s",
920
access=u"readwrite")
921
def last_checked_ok_dbus_property(self, value=None):
922
if value is not None:
923
self.checked_ok()
924
return
380
def still_valid(self):
381
"""Has the timeout not yet passed for this client?"""
382
now = datetime.datetime.now()
925
383
if self.last_checked_ok is None:
926
return dbus.String(u"")
927
return dbus.String(self._datetime_to_dbus(self
928
.last_checked_ok))
929
930
# timeout - property
931
@dbus_service_property(_interface, signature=u"t",
932
access=u"readwrite")
933
def timeout_dbus_property(self, value=None):
934
if value is None: # get
935
return dbus.UInt64(self.timeout_milliseconds())
936
self.timeout = datetime.timedelta(0, 0, 0, value)
937
# Emit D-Bus signal
938
self.PropertyChanged(dbus.String(u"timeout"),
939
dbus.UInt64(value, variant_level=1))
940
if getattr(self, u"disable_initiator_tag", None) is None:
941
return
942
# Reschedule timeout
943
gobject.source_remove(self.disable_initiator_tag)
944
self.disable_initiator_tag = None
945
time_to_die = (self.
946
_timedelta_to_milliseconds((self
947
.last_checked_ok
948
+ self.timeout)
949
- datetime.datetime
950
.utcnow()))
951
if time_to_die <= 0:
952
# The timeout has passed
953
self.disable()
954
else:
955
self.disable_initiator_tag = (gobject.timeout_add
956
(time_to_die, self.disable))
957
958
# interval - property
959
@dbus_service_property(_interface, signature=u"t",
960
access=u"readwrite")
961
def interval_dbus_property(self, value=None):
962
if value is None: # get
963
return dbus.UInt64(self.interval_milliseconds())
964
self.interval = datetime.timedelta(0, 0, 0, value)
965
# Emit D-Bus signal
966
self.PropertyChanged(dbus.String(u"interval"),
967
dbus.UInt64(value, variant_level=1))
968
if getattr(self, u"checker_initiator_tag", None) is None:
969
return
970
# Reschedule checker run
971
gobject.source_remove(self.checker_initiator_tag)
972
self.checker_initiator_tag = (gobject.timeout_add
973
(value, self.start_checker))
974
self.start_checker() # Start one now, too
975
976
# checker - property
977
@dbus_service_property(_interface, signature=u"s",
978
access=u"readwrite")
979
def checker_dbus_property(self, value=None):
980
if value is None: # get
981
return dbus.String(self.checker_command)
982
self.checker_command = value
983
# Emit D-Bus signal
984
self.PropertyChanged(dbus.String(u"checker"),
985
dbus.String(self.checker_command,
986
variant_level=1))
987
988
# checker_running - property
989
@dbus_service_property(_interface, signature=u"b",
990
access=u"readwrite")
991
def checker_running_dbus_property(self, value=None):
992
if value is None: # get
993
return dbus.Boolean(self.checker is not None)
994
if value:
995
self.start_checker()
996
else:
997
self.stop_checker()
998
999
# object_path - property
1000
@dbus_service_property(_interface, signature=u"o", access=u"read")
1001
def object_path_dbus_property(self):
1002
return self.dbus_object_path # is already a dbus.ObjectPath
1003
1004
# secret = property
1005
@dbus_service_property(_interface, signature=u"ay",
1006
access=u"write", byte_arrays=True)
1007
def secret_dbus_property(self, value):
1008
self.secret = str(value)
1009
1010
del _interface
1011
1012
1013
class ClientHandler(socketserver.BaseRequestHandler, object):
1014
"""A class to handle client connections.
1015
1016
Instantiated once for each connection to handle it.
384
return now < (self.created + self.timeout)
385
else:
386
return now < (self.last_checked_ok + self.timeout)
387
388
389
def peer_certificate(session):
390
"Return the peer's OpenPGP certificate as a bytestring"
391
# If not an OpenPGP certificate...
392
if gnutls.library.functions.gnutls_certificate_type_get\
393
(session._c_object) \
394
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
395
# ...do the normal thing
396
return session.peer_certificate
397
list_size = ctypes.c_uint()
398
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
399
(session._c_object, ctypes.byref(list_size))
400
if list_size.value == 0:
401
return None
402
cert = cert_list[0]
403
return ctypes.string_at(cert.data, cert.size)
404
405
406
def fingerprint(openpgp):
407
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
408
# New GnuTLS "datum" with the OpenPGP public key
409
datum = gnutls.library.types.gnutls_datum_t\
410
(ctypes.cast(ctypes.c_char_p(openpgp),
411
ctypes.POINTER(ctypes.c_ubyte)),
412
ctypes.c_uint(len(openpgp)))
413
# New empty GnuTLS certificate
414
crt = gnutls.library.types.gnutls_openpgp_crt_t()
415
gnutls.library.functions.gnutls_openpgp_crt_init\
416
(ctypes.byref(crt))
417
# Import the OpenPGP public key into the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_import\
419
(crt, ctypes.byref(datum),
420
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
421
# Verify the self signature in the key
422
crtverify = ctypes.c_uint()
423
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
424
(crt, 0, ctypes.byref(crtverify))
425
if crtverify.value != 0:
426
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
427
raise gnutls.errors.CertificateSecurityError("Verify failed")
428
# New buffer for the fingerprint
429
buf = ctypes.create_string_buffer(20)
430
buf_len = ctypes.c_size_t()
431
# Get the fingerprint from the certificate into the buffer
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
433
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
434
# Deinit the certificate
435
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
436
# Convert the buffer to a Python bytestring
437
fpr = ctypes.string_at(buf, buf_len.value)
438
# Convert the bytestring to hexadecimal notation
439
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
440
return hex_fpr
441
442
443
class TCP_handler(SocketServer.BaseRequestHandler, object):
444
"""A TCP request handler class.
445
Instantiated by IPv6_TCPServer for each request to handle it.
1017
446
Note: This will run in its own forked process."""
1018
447
1019
448
def handle(self):
1020
449
logger.info(u"TCP connection from: %s",
1021
unicode(self.client_address))
1022
logger.debug(u"IPC Pipe FD: %d",
1023
self.server.child_pipe[1].fileno())
1024
# Open IPC pipe to parent process
1025
with contextlib.nested(self.server.child_pipe[1],
1026
self.server.parent_pipe[0]
1027
) as (ipc, ipc_return):
1028
session = (gnutls.connection
1029
.ClientSession(self.request,
1030
gnutls.connection
1031
.X509Credentials()))
1032
1033
line = self.request.makefile().readline()
1034
logger.debug(u"Protocol version: %r", line)
1035
try:
1036
if int(line.strip().split()[0]) > 1:
1037
raise RuntimeError
1038
except (ValueError, IndexError, RuntimeError), error:
1039
logger.error(u"Unknown protocol version: %s", error)
1040
return
1041
1042
# Note: gnutls.connection.X509Credentials is really a
1043
# generic GnuTLS certificate credentials object so long as
1044
# no X.509 keys are added to it. Therefore, we can use it
1045
# here despite using OpenPGP certificates.
1046
1047
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1048
# u"+AES-256-CBC", u"+SHA1",
1049
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1050
# u"+DHE-DSS"))
1051
# Use a fallback default, since this MUST be set.
1052
priority = self.server.gnutls_priority
1053
if priority is None:
1054
priority = u"NORMAL"
1055
(gnutls.library.functions
1056
.gnutls_priority_set_direct(session._c_object,
1057
priority, None))
1058
1059
try:
1060
session.handshake()
1061
except gnutls.errors.GNUTLSError, error:
1062
logger.warning(u"Handshake failed: %s", error)
1063
# Do not run session.bye() here: the session is not
1064
# established. Just abandon the request.
1065
return
1066
logger.debug(u"Handshake succeeded")
1067
try:
1068
try:
1069
fpr = self.fingerprint(self.peer_certificate
1070
(session))
1071
except (TypeError, gnutls.errors.GNUTLSError), error:
1072
logger.warning(u"Bad certificate: %s", error)
1073
return
1074
logger.debug(u"Fingerprint: %s", fpr)
1075
1076
for c in self.server.clients:
1077
if c.fingerprint == fpr:
1078
client = c
1079
break
1080
else:
1081
ipc.write(u"NOTFOUND %s %s\n"
1082
% (fpr, unicode(self.client_address)))
1083
return
1084
1085
class proxyclient(object):
1086
def __getattribute__(self, name):
1087
ipc.write(u"GETATTR %s %s\n" % name, client.fpr)
1088
return pickle.load(ipc_reply)
1089
p = proxyclient(client)
1090
1091
while True:
1092
if not p.client.enabled:
1093
icp.write("DISABLED %s\n" % client.fpr)
1094
return
1095
if p.client.approved == False:
1096
icp.write("Disaproved")
1097
return
1098
1099
if not p.client.secret:
1100
icp.write("No password")
1101
elif not p.client.approved:
1102
icp.write("Need approval"):
1103
else:
1104
#We have a password and are approved
1105
break
1106
i, o, e = select(p.changesignal, (), (), client.delay)
1107
if not i:
1108
icp.write("Timeout passed")
1109
return
1110
1111
ipc.write(u"SENDING %s\n" % client.name)
1112
sent_size = 0
1113
while sent_size < len(client.secret):
1114
sent = session.send(client.secret[sent_size:])
1115
logger.debug(u"Sent: %d, remaining: %d",
1116
sent, len(client.secret)
1117
- (sent_size + sent))
1118
sent_size += sent
1119
finally:
1120
session.bye()
1121
1122
@staticmethod
1123
def peer_certificate(session):
1124
"Return the peer's OpenPGP certificate as a bytestring"
1125
# If not an OpenPGP certificate...
1126
if (gnutls.library.functions
1127
.gnutls_certificate_type_get(session._c_object)
1128
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1129
# ...do the normal thing
1130
return session.peer_certificate
1131
list_size = ctypes.c_uint(1)
1132
cert_list = (gnutls.library.functions
1133
.gnutls_certificate_get_peers
1134
(session._c_object, ctypes.byref(list_size)))
1135
if not bool(cert_list) and list_size.value != 0:
1136
raise gnutls.errors.GNUTLSError(u"error getting peer"
1137
u" certificate")
1138
if list_size.value == 0:
1139
return None
1140
cert = cert_list[0]
1141
return ctypes.string_at(cert.data, cert.size)
1142
1143
@staticmethod
1144
def fingerprint(openpgp):
1145
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1146
# New GnuTLS "datum" with the OpenPGP public key
1147
datum = (gnutls.library.types
1148
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1149
ctypes.POINTER
1150
(ctypes.c_ubyte)),
1151
ctypes.c_uint(len(openpgp))))
1152
# New empty GnuTLS certificate
1153
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1154
(gnutls.library.functions
1155
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1156
# Import the OpenPGP public key into the certificate
1157
(gnutls.library.functions
1158
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1159
gnutls.library.constants
1160
.GNUTLS_OPENPGP_FMT_RAW))
1161
# Verify the self signature in the key
1162
crtverify = ctypes.c_uint()
1163
(gnutls.library.functions
1164
.gnutls_openpgp_crt_verify_self(crt, 0,
1165
ctypes.byref(crtverify)))
1166
if crtverify.value != 0:
1167
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1168
raise (gnutls.errors.CertificateSecurityError
1169
(u"Verify failed"))
1170
# New buffer for the fingerprint
1171
buf = ctypes.create_string_buffer(20)
1172
buf_len = ctypes.c_size_t()
1173
# Get the fingerprint from the certificate into the buffer
1174
(gnutls.library.functions
1175
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1176
ctypes.byref(buf_len)))
1177
# Deinit the certificate
1178
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1179
# Convert the buffer to a Python bytestring
1180
fpr = ctypes.string_at(buf, buf_len.value)
1181
# Convert the bytestring to hexadecimal notation
1182
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1183
return hex_fpr
1184
1185
1186
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1187
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1188
def process_request(self, request, client_address):
1189
"""Overrides and wraps the original process_request().
1190
1191
This function creates a new pipe in self.pipe
1192
"""
1193
# Child writes to child_pipe
1194
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1195
# Parent writes to parent_pipe
1196
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1197
super(ForkingMixInWithPipes,
1198
self).process_request(request, client_address)
1199
# Close unused ends for parent
1200
self.parent_pipe[0].close() # close read end
1201
self.child_pipe[1].close() # close write end
1202
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1203
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1204
"""Dummy function; override as necessary"""
1205
child_pipe_fd.close()
1206
parent_pipe_fd.close()
1207
1208
1209
class IPv6_TCPServer(ForkingMixInWithPipes,
1210
socketserver.TCPServer, object):
1211
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1212
450
unicode(self.client_address))
451
session = gnutls.connection.ClientSession\
452
(self.request, gnutls.connection.X509Credentials())
453
454
line = self.request.makefile().readline()
455
logger.debug(u"Protocol version: %r", line)
456
try:
457
if int(line.strip().split()[0]) > 1:
458
raise RuntimeError
459
except (ValueError, IndexError, RuntimeError), error:
460
logger.error(u"Unknown protocol version: %s", error)
461
return
462
463
# Note: gnutls.connection.X509Credentials is really a generic
464
# GnuTLS certificate credentials object so long as no X.509
465
# keys are added to it. Therefore, we can use it here despite
466
# using OpenPGP certificates.
467
468
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
469
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
470
# "+DHE-DSS"))
471
priority = "NORMAL" # Fallback default, since this
472
# MUST be set.
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
475
gnutls.library.functions.gnutls_priority_set_direct\
476
(session._c_object, priority, None)
477
478
try:
479
session.handshake()
480
except gnutls.errors.GNUTLSError, error:
481
logger.warning(u"Handshake failed: %s", error)
482
# Do not run session.bye() here: the session is not
483
# established. Just abandon the request.
484
return
485
try:
486
fpr = fingerprint(peer_certificate(session))
487
except (TypeError, gnutls.errors.GNUTLSError), error:
488
logger.warning(u"Bad certificate: %s", error)
489
session.bye()
490
return
491
logger.debug(u"Fingerprint: %s", fpr)
492
client = None
493
for c in self.server.clients:
494
if c.fingerprint == fpr:
495
client = c
496
break
497
if not client:
498
logger.warning(u"Client not found for fingerprint: %s",
499
fpr)
500
session.bye()
501
return
502
# Have to check if client.still_valid(), since it is possible
503
# that the client timed out while establishing the GnuTLS
504
# session.
505
if not client.still_valid():
506
logger.warning(u"Client %(name)s is invalid",
507
vars(client))
508
session.bye()
509
return
510
sent_size = 0
511
while sent_size < len(client.secret):
512
sent = session.send(client.secret[sent_size:])
513
logger.debug(u"Sent: %d, remaining: %d",
514
sent, len(client.secret)
515
- (sent_size + sent))
516
sent_size += sent
517
session.bye()
518
519
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1213
522
Attributes:
523
settings: Server settings
524
clients: Set() of Client objects
1214
525
enabled: Boolean; whether this server is activated yet
1215
interface: None or a network interface name (string)
1216
use_ipv6: Boolean; to use IPv6 or not
1217
526
"""
1218
def __init__(self, server_address, RequestHandlerClass,
1219
interface=None, use_ipv6=True):
1220
self.interface = interface
1221
if use_ipv6:
1222
self.address_family = socket.AF_INET6
1223
socketserver.TCPServer.__init__(self, server_address,
1224
RequestHandlerClass)
527
address_family = socket.AF_INET6
528
def __init__(self, *args, **kwargs):
529
if "settings" in kwargs:
530
self.settings = kwargs["settings"]
531
del kwargs["settings"]
532
if "clients" in kwargs:
533
self.clients = kwargs["clients"]
534
del kwargs["clients"]
535
self.enabled = False
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1225
537
def server_bind(self):
1226
538
"""This overrides the normal server_bind() function
1227
539
to bind to an interface if one was specified, and also NOT to
1228
540
bind to an address or port if they were not specified."""
1229
if self.interface is not None:
1230
if SO_BINDTODEVICE is None:
1231
logger.error(u"SO_BINDTODEVICE does not exist;"
1232
u" cannot bind to interface %s",
1233
self.interface)
1234
else:
1235
try:
1236
self.socket.setsockopt(socket.SOL_SOCKET,
1237
SO_BINDTODEVICE,
1238
str(self.interface
1239
+ u'\0'))
1240
except socket.error, error:
1241
if error[0] == errno.EPERM:
1242
logger.error(u"No permission to"
1243
u" bind to interface %s",
1244
self.interface)
1245
elif error[0] == errno.ENOPROTOOPT:
1246
logger.error(u"SO_BINDTODEVICE not available;"
1247
u" cannot bind to interface %s",
1248
self.interface)
1249
else:
1250
raise
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
544
try:
545
self.socket.setsockopt(socket.SOL_SOCKET,
546
SO_BINDTODEVICE,
547
self.settings["interface"])
548
except socket.error, error:
549
if error[0] == errno.EPERM:
550
logger.error(u"No permission to"
551
u" bind to interface %s",
552
self.settings["interface"])
553
else:
554
raise error
1251
555
# Only bind(2) the socket if we really need to.
1252
556
if self.server_address[0] or self.server_address[1]:
1253
557
if not self.server_address[0]:
1254
if self.address_family == socket.AF_INET6:
1255
any_address = u"::" # in6addr_any
1256
else:
1257
any_address = socket.INADDR_ANY
1258
self.server_address = (any_address,
558
in6addr_any = "::"
559
self.server_address = (in6addr_any,
1259
560
self.server_address[1])
1260
561
elif not self.server_address[1]:
1261
562
self.server_address = (self.server_address[0],
1262
563
0)
1263
# if self.interface:
564
# if self.settings["interface"]:
1264
565
# self.server_address = (self.server_address[0],
1265
566
# 0, # port
1266
567
# 0, # flowinfo
1267
568
# if_nametoindex
1268
# (self.interface))
1269
return socketserver.TCPServer.server_bind(self)
1270
1271
1272
class MandosServer(IPv6_TCPServer):
1273
"""Mandos server.
1274
1275
Attributes:
1276
clients: set of Client objects
1277
gnutls_priority GnuTLS priority string
1278
use_dbus: Boolean; to emit D-Bus signals or not
1279
1280
Assumes a gobject.MainLoop event loop.
1281
"""
1282
def __init__(self, server_address, RequestHandlerClass,
1283
interface=None, use_ipv6=True, clients=None,
1284
gnutls_priority=None, use_dbus=True):
1285
self.enabled = False
1286
self.clients = clients
1287
if self.clients is None:
1288
self.clients = set()
1289
self.use_dbus = use_dbus
1290
self.gnutls_priority = gnutls_priority
1291
IPv6_TCPServer.__init__(self, server_address,
1292
RequestHandlerClass,
1293
interface = interface,
1294
use_ipv6 = use_ipv6)
569
# (self.settings
570
# ["interface"]))
571
return super(IPv6_TCPServer, self).server_bind()
1295
572
def server_activate(self):
1296
573
if self.enabled:
1297
return socketserver.TCPServer.server_activate(self)
574
return super(IPv6_TCPServer, self).server_activate()
1298
575
def enable(self):
1299
576
self.enabled = True
1300
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1301
# Call "handle_ipc" for both data and EOF events
1302
gobject.io_add_watch(child_pipe_fd.fileno(),
1303
gobject.IO_IN | gobject.IO_HUP,
1304
functools.partial(self.handle_ipc,
1305
reply = parent_pipe_fd,
1306
sender= child_pipe_fd))
1307
def handle_ipc(self, source, condition, reply=None, sender=None):
1308
condition_names = {
1309
gobject.IO_IN: u"IN", # There is data to read.
1310
gobject.IO_OUT: u"OUT", # Data can be written (without
1311
# blocking).
1312
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1313
gobject.IO_ERR: u"ERR", # Error condition.
1314
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1315
# broken, usually for pipes and
1316
# sockets).
1317
}
1318
conditions_string = ' | '.join(name
1319
for cond, name in
1320
condition_names.iteritems()
1321
if cond & condition)
1322
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1323
conditions_string)
1324
1325
# Read a line from the file object
1326
cmdline = sender.readline()
1327
if not cmdline: # Empty line means end of file
1328
# close the IPC pipes
1329
sender.close()
1330
reply.close()
1331
1332
# Stop calling this function
1333
return False
1334
1335
logger.debug(u"IPC command: %r", cmdline)
1336
1337
# Parse and act on command
1338
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1339
1340
if cmd == u"NOTFOUND":
1341
fpr, address = args.split(None, 1)
1342
logger.warning(u"Client not found for fingerprint: %s, ad"
1343
u"dress: %s", fpr, address)
1344
if self.use_dbus:
1345
# Emit D-Bus signal
1346
mandos_dbus_service.ClientNotFound(fpr, address)
1347
elif cmd == u"DISABLED":
1348
for client in self.clients:
1349
if client.name == args:
1350
logger.warning(u"Client %s is disabled", args)
1351
if self.use_dbus:
1352
# Emit D-Bus signal
1353
client.Rejected()
1354
break
1355
else:
1356
logger.error(u"Unknown client %s is disabled", args)
1357
elif cmd == u"SENDING":
1358
for client in self.clients:
1359
if client.name == args:
1360
logger.info(u"Sending secret to %s", client.name)
1361
client.checked_ok()
1362
if self.use_dbus:
1363
# Emit D-Bus signal
1364
client.GotSecret()
1365
break
1366
else:
1367
logger.error(u"Sending secret to unknown client %s",
1368
args)
1369
elif cmd == u"GETATTR":
1370
attr_name, fpr = args.split(None, 1)
1371
for client in self.clients:
1372
if client.fingerprint == fpr:
1373
attr_value = getattr(client, attr_name, None)
1374
logger.debug("IPC reply: %r", attr_value)
1375
pickle.dump(attr_value, reply)
1376
break
1377
else:
1378
logger.error(u"Client %s on address %s requesting "
1379
u"attribute %s not found", fpr, address,
1380
attr_name)
1381
pickle.dump(None, reply)
1382
else:
1383
logger.error(u"Unknown IPC command: %r", cmdline)
1384
1385
# Keep calling this function
1386
return True
1387
577
1388
578
1389
579
def string_to_delta(interval):
1390
580
"""Parse a string and return a datetime.timedelta
1391
1392
>>> string_to_delta(u'7d')
581
582
>>> string_to_delta('7d')
1393
583
datetime.timedelta(7)
1394
>>> string_to_delta(u'60s')
584
>>> string_to_delta('60s')
1395
585
datetime.timedelta(0, 60)
1396
>>> string_to_delta(u'60m')
586
>>> string_to_delta('60m')
1397
587
datetime.timedelta(0, 3600)
1398
>>> string_to_delta(u'24h')
588
>>> string_to_delta('24h')
1399
589
datetime.timedelta(1)
1400
590
>>> string_to_delta(u'1w')
1401
591
datetime.timedelta(7)
1402
>>> string_to_delta(u'5m 30s')
592
>>> string_to_delta('5m 30s')
1403
593
datetime.timedelta(0, 330)
1404
594
"""
1405
595
timevalue = datetime.timedelta(0)
1418
608
elif suffix == u"w":
1419
609
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1420
610
else:
1421
raise ValueError(u"Unknown suffix %r" % suffix)
1422
except (ValueError, IndexError), e:
1423
raise ValueError(e.message)
611
raise ValueError
612
except (ValueError, IndexError):
613
raise ValueError
1424
614
timevalue += delta
1425
615
return timevalue
1426
616
1427
617
618
def server_state_changed(state):
619
"""Derived from the Avahi example code"""
620
if state == avahi.SERVER_COLLISION:
621
logger.error(u"Zeroconf server name collision")
622
service.remove()
623
elif state == avahi.SERVER_RUNNING:
624
service.add()
625
626
627
def entry_group_state_changed(state, error):
628
"""Derived from the Avahi example code"""
629
logger.debug(u"Avahi state change: %i", state)
630
631
if state == avahi.ENTRY_GROUP_ESTABLISHED:
632
logger.debug(u"Zeroconf service established.")
633
elif state == avahi.ENTRY_GROUP_COLLISION:
634
logger.warning(u"Zeroconf service name collision.")
635
service.rename()
636
elif state == avahi.ENTRY_GROUP_FAILURE:
637
logger.critical(u"Avahi: Error in group state changed %s",
638
unicode(error))
639
raise AvahiGroupError("State changed: %s", str(error))
640
1428
641
def if_nametoindex(interface):
1429
"""Call the C function if_nametoindex(), or equivalent
1430
1431
Note: This function cannot accept a unicode string."""
642
"""Call the C function if_nametoindex(), or equivalent"""
1432
643
global if_nametoindex
1433
644
try:
1434
if_nametoindex = (ctypes.cdll.LoadLibrary
1435
(ctypes.util.find_library(u"c"))
1436
.if_nametoindex)
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
1437
647
except (OSError, AttributeError):
1438
logger.warning(u"Doing if_nametoindex the hard way")
648
if "struct" not in sys.modules:
649
import struct
650
if "fcntl" not in sys.modules:
651
import fcntl
1439
652
def if_nametoindex(interface):
1440
653
"Get an interface index the hard way, i.e. using fcntl()"
1441
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1442
with contextlib.closing(socket.socket()) as s:
1443
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1444
struct.pack(str(u"16s16x"),
1445
interface))
1446
interface_index = struct.unpack(str(u"I"),
1447
ifreq[16:20])[0]
655
s = socket.socket()
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
658
s.close()
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
1448
660
return interface_index
1449
661
return if_nametoindex(interface)
1450
662
1451
663
1452
664
def daemon(nochdir = False, noclose = False):
1453
665
"""See daemon(3). Standard BSD Unix function.
1454
1455
666
This should really exist as os.daemon, but it doesn't (yet)."""
1456
667
if os.fork():
1457
668
sys.exit()
1458
669
os.setsid()
1459
670
if not nochdir:
1460
os.chdir(u"/")
671
os.chdir("/")
1461
672
if os.fork():
1462
673
sys.exit()
1463
674
if not noclose:
1465
676
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1466
677
if not stat.S_ISCHR(os.fstat(null).st_mode):
1467
678
raise OSError(errno.ENODEV,
1468
u"%s not a character device"
1469
% os.path.devnull)
679
"/dev/null not a character device")
1470
680
os.dup2(null, sys.stdin.fileno())
1471
681
os.dup2(null, sys.stdout.fileno())
1472
682
os.dup2(null, sys.stderr.fileno())
1475
685
1476
686
1477
687
def main():
1478
1479
##################################################################
1480
# Parsing of options, both command line and config file
1481
1482
parser = optparse.OptionParser(version = "%%prog %s" % version)
1483
parser.add_option("-i", u"--interface", type=u"string",
1484
metavar="IF", help=u"Bind to interface IF")
1485
parser.add_option("-a", u"--address", type=u"string",
1486
help=u"Address to listen for requests on")
1487
parser.add_option("-p", u"--port", type=u"int",
1488
help=u"Port number to receive requests on")
1489
parser.add_option("--check", action=u"store_true",
1490
help=u"Run self-test")
1491
parser.add_option("--debug", action=u"store_true",
1492
help=u"Debug mode; run in foreground and log to"
1493
u" terminal")
1494
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1495
u" priority string (see GnuTLS documentation)")
1496
parser.add_option("--servicename", type=u"string",
1497
metavar=u"NAME", help=u"Zeroconf service name")
1498
parser.add_option("--configdir", type=u"string",
1499
default=u"/etc/mandos", metavar=u"DIR",
1500
help=u"Directory to search for configuration"
1501
u" files")
1502
parser.add_option("--no-dbus", action=u"store_false",
1503
dest=u"use_dbus", help=u"Do not provide D-Bus"
1504
u" system bus interface")
1505
parser.add_option("--no-ipv6", action=u"store_false",
1506
dest=u"use_ipv6", help=u"Do not use IPv6")
688
parser = OptionParser(version = "%%prog %s" % version)
689
parser.add_option("-i", "--interface", type="string",
690
metavar="IF", help="Bind to interface IF")
691
parser.add_option("-a", "--address", type="string",
692
help="Address to listen for requests on")
693
parser.add_option("-p", "--port", type="int",
694
help="Port number to receive requests on")
695
parser.add_option("--check", action="store_true", default=False,
696
help="Run self-test")
697
parser.add_option("--debug", action="store_true",
698
help="Debug mode; run in foreground and log to"
699
" terminal")
700
parser.add_option("--priority", type="string", help="GnuTLS"
701
" priority string (see GnuTLS documentation)")
702
parser.add_option("--servicename", type="string", metavar="NAME",
703
help="Zeroconf service name")
704
parser.add_option("--configdir", type="string",
705
default="/etc/mandos", metavar="DIR",
706
help="Directory to search for configuration"
707
" files")
1507
708
options = parser.parse_args()[0]
1508
709
1509
710
if options.check:
1512
713
sys.exit()
1513
714
1514
715
# Default values for config file for server-global settings
1515
server_defaults = { u"interface": u"",
1516
u"address": u"",
1517
u"port": u"",
1518
u"debug": u"False",
1519
u"priority":
1520
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1521
u"servicename": u"Mandos",
1522
u"use_dbus": u"True",
1523
u"use_ipv6": u"True",
716
server_defaults = { "interface": "",
717
"address": "",
718
"port": "",
719
"debug": "False",
720
"priority":
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
722
"servicename": "Mandos",
1524
723
}
1525
724
1526
725
# Parse config file for server-global settings
1527
server_config = configparser.SafeConfigParser(server_defaults)
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
1528
727
del server_defaults
1529
server_config.read(os.path.join(options.configdir,
1530
u"mandos.conf"))
728
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1531
729
# Convert the SafeConfigParser object to a dict
1532
730
server_settings = server_config.defaults()
1533
# Use the appropriate methods on the non-string config options
1534
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1535
server_settings[option] = server_config.getboolean(u"DEFAULT",
1536
option)
1537
if server_settings["port"]:
1538
server_settings["port"] = server_config.getint(u"DEFAULT",
1539
u"port")
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
733
("DEFAULT", "debug")
1540
734
del server_config
1541
735
1542
736
# Override the settings from the config file with command line
1543
737
# options, if set.
1544
for option in (u"interface", u"address", u"port", u"debug",
1545
u"priority", u"servicename", u"configdir",
1546
u"use_dbus", u"use_ipv6"):
738
for option in ("interface", "address", "port", "debug",
739
"priority", "servicename", "configdir"):
1547
740
value = getattr(options, option)
1548
741
if value is not None:
1549
742
server_settings[option] = value
1550
743
del options
1551
# Force all strings to be unicode
1552
for option in server_settings.keys():
1553
if type(server_settings[option]) is str:
1554
server_settings[option] = unicode(server_settings[option])
1555
744
# Now we have our good server settings in "server_settings"
1556
745
1557
##################################################################
1558
1559
# For convenience
1560
debug = server_settings[u"debug"]
1561
use_dbus = server_settings[u"use_dbus"]
1562
use_ipv6 = server_settings[u"use_ipv6"]
746
debug = server_settings["debug"]
1563
747
1564
748
if not debug:
1565
749
syslogger.setLevel(logging.WARNING)
1566
750
console.setLevel(logging.WARNING)
1567
751
1568
if server_settings[u"servicename"] != u"Mandos":
1569
syslogger.setFormatter(logging.Formatter
1570
(u'Mandos (%s) [%%(process)d]:'
1571
u' %%(levelname)s: %%(message)s'
1572
% server_settings[u"servicename"]))
752
if server_settings["servicename"] != "Mandos":
753
syslogger.setFormatter(logging.Formatter\
754
('Mandos (%s): %%(levelname)s:'
755
' %%(message)s'
756
% server_settings["servicename"]))
1573
757
1574
758
# Parse config file with clients
1575
client_defaults = { u"timeout": u"1h",
1576
u"interval": u"5m",
1577
u"checker": u"fping -q -- %%(host)s",
1578
u"host": u"",
759
client_defaults = { "timeout": "1h",
760
"interval": "5m",
761
"checker": "fping -q -- %(host)s",
762
"host": "",
1579
763
}
1580
client_config = configparser.SafeConfigParser(client_defaults)
1581
client_config.read(os.path.join(server_settings[u"configdir"],
1582
u"clients.conf"))
1583
1584
global mandos_dbus_service
1585
mandos_dbus_service = None
1586
1587
tcp_server = MandosServer((server_settings[u"address"],
1588
server_settings[u"port"]),
1589
ClientHandler,
1590
interface=server_settings[u"interface"],
1591
use_ipv6=use_ipv6,
1592
gnutls_priority=
1593
server_settings[u"priority"],
1594
use_dbus=use_dbus)
1595
pidfilename = u"/var/run/mandos.pid"
1596
try:
1597
pidfile = open(pidfilename, u"w")
1598
except IOError:
1599
logger.error(u"Could not open file %r", pidfilename)
1600
1601
try:
1602
uid = pwd.getpwnam(u"_mandos").pw_uid
1603
gid = pwd.getpwnam(u"_mandos").pw_gid
1604
except KeyError:
1605
try:
1606
uid = pwd.getpwnam(u"mandos").pw_uid
1607
gid = pwd.getpwnam(u"mandos").pw_gid
1608
except KeyError:
1609
try:
1610
uid = pwd.getpwnam(u"nobody").pw_uid
1611
gid = pwd.getpwnam(u"nobody").pw_gid
1612
except KeyError:
1613
uid = 65534
1614
gid = 65534
1615
try:
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
765
client_config.read(os.path.join(server_settings["configdir"],
766
"clients.conf"))
767
768
clients = Set()
769
tcp_server = IPv6_TCPServer((server_settings["address"],
770
server_settings["port"]),
771
TCP_handler,
772
settings=server_settings,
773
clients=clients)
774
pidfilename = "/var/run/mandos.pid"
775
try:
776
pidfile = open(pidfilename, "w")
777
except IOError, error:
778
logger.error("Could not open file %r", pidfilename)
779
780
uid = 65534
781
gid = 65534
782
try:
783
uid = pwd.getpwnam("mandos").pw_uid
784
except KeyError:
785
try:
786
uid = pwd.getpwnam("nobody").pw_uid
787
except KeyError:
788
pass
789
try:
790
gid = pwd.getpwnam("mandos").pw_gid
791
except KeyError:
792
try:
793
gid = pwd.getpwnam("nogroup").pw_gid
794
except KeyError:
795
pass
796
try:
797
os.setuid(uid)
1616
798
os.setgid(gid)
1617
os.setuid(uid)
1618
799
except OSError, error:
1619
800
if error[0] != errno.EPERM:
1620
801
raise error
1621
802
1622
# Enable all possible GnuTLS debugging
1623
if debug:
1624
# "Use a log level over 10 to enable all debugging options."
1625
# - GnuTLS manual
1626
gnutls.library.functions.gnutls_global_set_log_level(11)
1627
1628
@gnutls.library.types.gnutls_log_func
1629
def debug_gnutls(level, string):
1630
logger.debug(u"GnuTLS: %s", string[:-1])
1631
1632
(gnutls.library.functions
1633
.gnutls_global_set_log_function(debug_gnutls))
803
global service
804
service = AvahiService(name = server_settings["servicename"],
805
servicetype = "_mandos._tcp", )
806
if server_settings["interface"]:
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
1634
809
1635
810
global main_loop
811
global bus
812
global server
1636
813
# From the Avahi example code
1637
814
DBusGMainLoop(set_as_default=True )
1638
815
main_loop = gobject.MainLoop()
1639
816
bus = dbus.SystemBus()
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
1640
820
# End of Avahi example code
1641
if use_dbus:
1642
try:
1643
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1644
bus, do_not_queue=True)
1645
except dbus.exceptions.NameExistsException, e:
1646
logger.error(unicode(e) + u", disabling D-Bus")
1647
use_dbus = False
1648
server_settings[u"use_dbus"] = False
1649
tcp_server.use_dbus = False
1650
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1651
service = AvahiService(name = server_settings[u"servicename"],
1652
servicetype = u"_mandos._tcp",
1653
protocol = protocol, bus = bus)
1654
if server_settings["interface"]:
1655
service.interface = (if_nametoindex
1656
(str(server_settings[u"interface"])))
1657
1658
client_class = Client
1659
if use_dbus:
1660
client_class = functools.partial(ClientDBus, bus = bus)
1661
tcp_server.clients.update(set(
1662
client_class(name = section,
1663
config= dict(client_config.items(section)))
1664
for section in client_config.sections()))
1665
if not tcp_server.clients:
1666
logger.warning(u"No clients defined")
821
822
def remove_from_clients(client):
823
clients.remove(client)
824
if not clients:
825
logger.critical(u"No clients left, exiting")
826
sys.exit()
827
828
clients.update(Set(Client(name = section,
829
stop_hook = remove_from_clients,
830
config
831
= dict(client_config.items(section)))
832
for section in client_config.sections()))
833
if not clients:
834
logger.critical(u"No clients defined")
835
sys.exit(1)
1667
836
1668
837
if debug:
1669
838
# Redirect stdin so all checkers get /dev/null
1678
847
daemon()
1679
848
1680
849
try:
1681
with pidfile:
1682
pid = os.getpid()
1683
pidfile.write(str(pid) + "\n")
850
pid = os.getpid()
851
pidfile.write(str(pid) + "\n")
852
pidfile.close()
1684
853
del pidfile
1685
854
except IOError:
1686
855
logger.error(u"Could not write to file %r with PID %d",
1690
859
pass
1691
860
del pidfilename
1692
861
862
def cleanup():
863
"Cleanup function; run on exit"
864
global group
865
# From the Avahi example code
866
if not group is None:
867
group.Free()
868
group = None
869
# End of Avahi example code
870
871
while clients:
872
client = clients.pop()
873
client.stop_hook = None
874
client.stop()
875
876
atexit.register(cleanup)
877
1693
878
if not debug:
1694
879
signal.signal(signal.SIGINT, signal.SIG_IGN)
1695
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1696
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1697
882
1698
if use_dbus:
1699
class MandosDBusService(dbus.service.Object):
1700
"""A D-Bus proxy object"""
1701
def __init__(self):
1702
dbus.service.Object.__init__(self, bus, u"/")
1703
_interface = u"se.bsnet.fukt.Mandos"
1704
1705
@dbus.service.signal(_interface, signature=u"o")
1706
def ClientAdded(self, objpath):
1707
"D-Bus signal"
1708
pass
1709
1710
@dbus.service.signal(_interface, signature=u"ss")
1711
def ClientNotFound(self, fingerprint, address):
1712
"D-Bus signal"
1713
pass
1714
1715
@dbus.service.signal(_interface, signature=u"os")
1716
def ClientRemoved(self, objpath, name):
1717
"D-Bus signal"
1718
pass
1719
1720
@dbus.service.method(_interface, out_signature=u"ao")
1721
def GetAllClients(self):
1722
"D-Bus method"
1723
return dbus.Array(c.dbus_object_path
1724
for c in tcp_server.clients)
1725
1726
@dbus.service.method(_interface,
1727
out_signature=u"a{oa{sv}}")
1728
def GetAllClientsWithProperties(self):
1729
"D-Bus method"
1730
return dbus.Dictionary(
1731
((c.dbus_object_path, c.GetAll(u""))
1732
for c in tcp_server.clients),
1733
signature=u"oa{sv}")
1734
1735
@dbus.service.method(_interface, in_signature=u"o")
1736
def RemoveClient(self, object_path):
1737
"D-Bus method"
1738
for c in tcp_server.clients:
1739
if c.dbus_object_path == object_path:
1740
tcp_server.clients.remove(c)
1741
c.remove_from_connection()
1742
# Don't signal anything except ClientRemoved
1743
c.disable(quiet=True)
1744
# Emit D-Bus signal
1745
self.ClientRemoved(object_path, c.name)
1746
return
1747
raise KeyError(object_path)
1748
1749
del _interface
1750
1751
mandos_dbus_service = MandosDBusService()
1752
1753
def cleanup():
1754
"Cleanup function; run on exit"
1755
service.cleanup()
1756
1757
while tcp_server.clients:
1758
client = tcp_server.clients.pop()
1759
if use_dbus:
1760
client.remove_from_connection()
1761
client.disable_hook = None
1762
# Don't signal anything except ClientRemoved
1763
client.disable(quiet=True)
1764
if use_dbus:
1765
# Emit D-Bus signal
1766
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1767
client.name)
1768
1769
atexit.register(cleanup)
1770
1771
for client in tcp_server.clients:
1772
if use_dbus:
1773
# Emit D-Bus signal
1774
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1775
client.enable()
883
for client in clients:
884
client.start()
1776
885
1777
886
tcp_server.enable()
1778
887
tcp_server.server_activate()
1779
888
1780
889
# Find out what port we got
1781
890
service.port = tcp_server.socket.getsockname()[1]
1782
if use_ipv6:
1783
logger.info(u"Now listening on address %r, port %d,"
1784
" flowinfo %d, scope_id %d"
1785
% tcp_server.socket.getsockname())
1786
else: # IPv4
1787
logger.info(u"Now listening on address %r, port %d"
1788
% tcp_server.socket.getsockname())
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
1789
893
1790
894
#service.interface = tcp_server.socket.getsockname()[3]
1791
895
1792
896
try:
1793
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
1794
899
try:
1795
service.activate()
900
server_state_changed(server.GetState())
1796
901
except dbus.exceptions.DBusException, error:
1797
902
logger.critical(u"DBusException: %s", error)
1798
cleanup()
1799
903
sys.exit(1)
1800
904
# End of Avahi example code
1801
905
1802
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1803
907
lambda *args, **kwargs:
1804
(tcp_server.handle_request
1805
(*args[2:], **kwargs) or True))
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
1806
910
1807
911
logger.debug(u"Starting main loop")
1808
912
main_loop.run()
1809
913
except AvahiError, error:
1810
logger.critical(u"AvahiError: %s", error)
1811
cleanup()
914
logger.critical(u"AvahiError: %s" + unicode(error))
1812
915
sys.exit(1)
1813
916
except KeyboardInterrupt:
1814
917
if debug:
1815
print >> sys.stderr
1816
logger.debug(u"Server received KeyboardInterrupt")
1817
logger.debug(u"Server exiting")
1818
# Must run before the D-Bus bus name gets deregistered
1819
cleanup()
918
print
1820
919
1821
920
if __name__ == '__main__':
1822
921
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0