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- Committer: Teddy Hogeborn
- Date: 2008-10-18 11:17:22 UTC
- Revision ID: teddy@fukt.bsnet.se-20081018111722-jtbz35c031lxuuc9
* debian/mandos-client.docs (NEWS): Added.
* debian/mandos.docs (NEWS): - '' -
* debian/mandos.docs (NEWS): - '' -
- files added:
- debian/mandos-client.config
- files removed:
- debian/watch
- 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
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
58
63
59
import dbus
64
import dbus.service
65
60
import gobject
66
61
import avahi
67
62
from dbus.mainloop.glib import DBusGMainLoop
68
63
import ctypes
69
64
import ctypes.util
70
65
71
try:
72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
73
except AttributeError:
74
try:
75
from IN import SO_BINDTODEVICE
76
except ImportError:
77
# From /usr/include/asm/socket.h
78
SO_BINDTODEVICE = 25
79
80
81
version = "1.0.8"
82
83
logger = logging.Logger(u'mandos')
84
syslogger = (logging.handlers.SysLogHandler
85
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
86
address = "/dev/log"))
87
syslogger.setFormatter(logging.Formatter
88
(u'Mandos [%(process)d]: %(levelname)s:'
89
u' %(message)s'))
66
version = "1.0.2"
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'))
90
74
logger.addHandler(syslogger)
91
75
92
76
console = logging.StreamHandler()
93
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
94
u' %(levelname)s:'
95
u' %(message)s'))
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
96
79
logger.addHandler(console)
97
80
98
81
class AvahiError(Exception):
99
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
100
83
self.value = value
101
super(AvahiError, self).__init__(value, *args, **kwargs)
102
def __unicode__(self):
103
return unicode(repr(self.value))
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
104
87
105
88
class AvahiServiceError(AvahiError):
106
89
pass
111
94
112
95
class AvahiService(object):
113
96
"""An Avahi (Zeroconf) service.
114
115
97
Attributes:
116
98
interface: integer; avahi.IF_UNSPEC or an interface index.
117
99
Used to optionally bind to the specified interface.
118
name: string; Example: u'Mandos'
119
type: string; Example: u'_mandos._tcp'.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
120
102
See <http://www.dns-sd.org/ServiceTypes.html>
121
103
port: integer; what port to announce
122
104
TXT: list of strings; TXT record for the service
125
107
max_renames: integer; maximum number of renames
126
108
rename_count: integer; counter so we only rename after collisions
127
109
a sensible number of times
128
group: D-Bus Entry Group
129
server: D-Bus Server
130
110
"""
131
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
135
114
self.interface = interface
136
115
self.name = name
137
116
self.type = servicetype
138
117
self.port = port
139
self.TXT = TXT if TXT is not None else []
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
140
122
self.domain = domain
141
123
self.host = host
142
124
self.rename_count = 0
143
125
self.max_renames = max_renames
144
self.protocol = protocol
145
self.group = None # our entry group
146
self.server = None
147
self.bus = bus
148
126
def rename(self):
149
127
"""Derived from the Avahi example code"""
150
128
if self.rename_count >= self.max_renames:
151
129
logger.critical(u"No suitable Zeroconf service name found"
152
130
u" after %i retries, exiting.",
153
131
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
156
134
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
162
139
self.remove()
163
140
self.add()
164
141
self.rename_count += 1
165
142
def remove(self):
166
143
"""Derived from the Avahi example code"""
167
if self.group is not None:
168
self.group.Reset()
144
if group is not None:
145
group.Reset()
169
146
def add(self):
170
147
"""Derived from the Avahi example code"""
171
if self.group is None:
172
self.group = dbus.Interface(
173
self.bus.get_object(avahi.DBUS_NAME,
174
self.server.EntryGroupNew()),
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self.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)
178
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
179
self.name, self.type)
180
self.group.AddService(
181
self.interface,
182
self.protocol,
183
dbus.UInt32(0), # flags
184
self.name, self.type,
185
self.domain, self.host,
186
dbus.UInt16(self.port),
187
avahi.string_array_to_txt_array(self.TXT))
188
self.group.Commit()
189
def entry_group_state_changed(self, state, error):
190
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
192
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
195
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
197
self.rename()
198
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
200
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
203
def cleanup(self):
204
"""Derived from the Avahi example code"""
205
if self.group is not None:
206
self.group.Free()
207
self.group = None
208
def server_state_changed(self, state):
209
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
213
elif state == avahi.SERVER_RUNNING:
214
self.add()
215
def activate(self):
216
"""Derived from the Avahi example code"""
217
if self.server is None:
218
self.server = dbus.Interface(
219
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
221
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
223
self.server_state_changed)
224
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
225
171
226
172
227
173
class Client(object):
228
174
"""A representation of a client host served by this server.
229
230
175
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
176
name: string; from the config file, used in log messages
233
177
fingerprint: string (40 or 32 hexadecimal digits); used to
234
178
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
245
checker: subprocess.Popen(); a running checker process used
246
to see if the client lives.
247
'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.
248
190
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
191
stop_initiator_tag: - '' -
250
192
checker_callback_tag: - '' -
251
193
checker_command: string; External command which is run to check if
252
194
client lives. %() expansions are done at
253
195
runtime with vars(self) as dict, so that for
254
196
instance %(name)s can be used in the command.
255
current_checker_command: string; current running checker_command
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: - '' -
256
202
"""
257
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
264
265
def timeout_milliseconds(self):
266
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
268
269
def interval_milliseconds(self):
270
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
272
273
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):
274
227
"""Note: the 'checker' key in 'config' sets the
275
228
'checker_command' attribute and *not* the 'checker'
276
229
attribute."""
277
self.name = name
278
230
if config is None:
279
231
config = {}
232
self.name = name
280
233
logger.debug(u"Creating client %r", self.name)
281
234
# Uppercase and remove spaces from fingerprint for later
282
235
# comparison purposes with return value from the fingerprint()
283
236
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
286
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
293
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()
294
247
else:
295
248
raise TypeError(u"No secret or secfile for client %s"
296
249
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.now()
301
252
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
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
305
256
self.checker = None
306
257
self.checker_initiator_tag = None
307
self.disable_initiator_tag = None
258
self.stop_initiator_tag = None
308
259
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
self.current_checker_command = None
311
self.last_connect = None
312
313
def enable(self):
260
self.check_command = config["checker"]
261
def start(self):
314
262
"""Start this client's checker and timeout hooks"""
315
self.last_enabled = datetime.datetime.utcnow()
316
263
# Schedule a new checker to be started an 'interval' from now,
317
264
# and every interval from then on.
318
self.checker_initiator_tag = (gobject.timeout_add
319
(self.interval_milliseconds(),
320
self.start_checker))
265
self.checker_initiator_tag = gobject.timeout_add\
266
(self._interval_milliseconds,
267
self.start_checker)
321
268
# Also start a new checker *right now*.
322
269
self.start_checker()
323
# Schedule a disable() when 'timeout' has passed
324
self.disable_initiator_tag = (gobject.timeout_add
325
(self.timeout_milliseconds(),
326
self.disable))
327
self.enabled = True
328
329
def disable(self):
330
"""Disable this client."""
331
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:
332
283
return False
333
logger.info(u"Disabling client %s", self.name)
334
if getattr(self, u"disable_initiator_tag", False):
335
gobject.source_remove(self.disable_initiator_tag)
336
self.disable_initiator_tag = None
337
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):
338
288
gobject.source_remove(self.checker_initiator_tag)
339
289
self.checker_initiator_tag = None
340
290
self.stop_checker()
341
if self.disable_hook:
342
self.disable_hook(self)
343
self.enabled = False
291
if self.stop_hook:
292
self.stop_hook(self)
344
293
# Do not run this again if called by a gobject.timeout_add
345
294
return False
346
347
295
def __del__(self):
348
self.disable_hook = None
349
self.disable()
350
351
def checker_callback(self, pid, condition, command):
296
self.stop_hook = None
297
self.stop()
298
def checker_callback(self, pid, condition):
352
299
"""The checker has completed, so take appropriate actions."""
300
now = datetime.datetime.now()
353
301
self.checker_callback_tag = None
354
302
self.checker = None
355
if os.WIFEXITED(condition):
356
exitstatus = os.WEXITSTATUS(condition)
357
if exitstatus == 0:
358
logger.info(u"Checker for %(name)s succeeded",
359
vars(self))
360
self.checked_ok()
361
else:
362
logger.info(u"Checker for %(name)s failed",
363
vars(self))
364
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):
365
313
logger.warning(u"Checker for %(name)s crashed?",
366
314
vars(self))
367
368
def checked_ok(self):
369
"""Bump up the timeout for this client.
370
371
This should only be called when the client has been seen,
372
alive and well.
373
"""
374
self.last_checked_ok = datetime.datetime.utcnow()
375
gobject.source_remove(self.disable_initiator_tag)
376
self.disable_initiator_tag = (gobject.timeout_add
377
(self.timeout_milliseconds(),
378
self.disable))
379
315
else:
316
logger.info(u"Checker for %(name)s failed",
317
vars(self))
380
318
def start_checker(self):
381
319
"""Start a new checker subprocess if one is not running.
382
383
320
If a checker already exists, leave it running and do
384
321
nothing."""
385
322
# The reason for not killing a running checker is that if we
390
327
# checkers alone, the checker would have to take more time
391
328
# than 'timeout' for the client to be declared invalid, which
392
329
# is as it should be.
393
394
# If a checker exists, make sure it is not a zombie
395
if self.checker is not None:
396
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
397
if pid:
398
logger.warning(u"Checker was a zombie")
399
gobject.source_remove(self.checker_callback_tag)
400
self.checker_callback(pid, status,
401
self.current_checker_command)
402
# Start a new checker if needed
403
330
if self.checker is None:
404
331
try:
405
# In case checker_command has exactly one % operator
406
command = self.checker_command % self.host
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
407
334
except TypeError:
408
335
# Escape attributes for the shell
409
escaped_attrs = dict((key,
410
re.escape(unicode(str(val),
411
errors=
412
u'replace')))
336
escaped_attrs = dict((key, re.escape(str(val)))
413
337
for key, val in
414
338
vars(self).iteritems())
415
339
try:
416
command = self.checker_command % escaped_attrs
340
command = self.check_command % escaped_attrs
417
341
except TypeError, error:
418
342
logger.error(u'Could not format string "%s":'
419
u' %s', self.checker_command, error)
343
u' %s', self.check_command, error)
420
344
return True # Try again later
421
self.current_checker_command = command
422
345
try:
423
346
logger.info(u"Starting checker %r for %s",
424
347
command, self.name)
428
351
# always replaced by /dev/null.)
429
352
self.checker = subprocess.Popen(command,
430
353
close_fds=True,
431
shell=True, cwd=u"/")
432
self.checker_callback_tag = (gobject.child_watch_add
433
(self.checker.pid,
434
self.checker_callback,
435
data=command))
436
# The checker may have completed before the gobject
437
# watch was added. Check for this.
438
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
439
if pid:
440
gobject.source_remove(self.checker_callback_tag)
441
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)
442
358
except OSError, error:
443
359
logger.error(u"Failed to start subprocess: %s",
444
360
error)
445
361
# Re-run this periodically if run by gobject.timeout_add
446
362
return True
447
448
363
def stop_checker(self):
449
364
"""Force the checker process, if any, to stop."""
450
365
if self.checker_callback_tag:
451
366
gobject.source_remove(self.checker_callback_tag)
452
367
self.checker_callback_tag = None
453
if getattr(self, u"checker", None) is None:
368
if getattr(self, "checker", None) is None:
454
369
return
455
370
logger.debug(u"Stopping checker for %(name)s", vars(self))
456
371
try:
462
377
if error.errno != errno.ESRCH: # No such process
463
378
raise
464
379
self.checker = None
465
466
380
def still_valid(self):
467
381
"""Has the timeout not yet passed for this client?"""
468
if not getattr(self, u"enabled", False):
469
return False
470
now = datetime.datetime.utcnow()
382
now = datetime.datetime.now()
471
383
if self.last_checked_ok is None:
472
384
return now < (self.created + self.timeout)
473
385
else:
474
386
return now < (self.last_checked_ok + self.timeout)
475
387
476
388
477
class ClientDBus(Client, dbus.service.Object):
478
"""A Client class using D-Bus
479
480
Attributes:
481
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
482
"""
483
# dbus.service.Object doesn't use super(), so we can't either.
484
485
def __init__(self, bus = None, *args, **kwargs):
486
self.bus = bus
487
Client.__init__(self, *args, **kwargs)
488
# Only now, when this client is initialized, can it show up on
489
# the D-Bus
490
self.dbus_object_path = (dbus.ObjectPath
491
(u"/clients/"
492
+ self.name.replace(u".", u"_")))
493
dbus.service.Object.__init__(self, self.bus,
494
self.dbus_object_path)
495
496
@staticmethod
497
def _datetime_to_dbus(dt, variant_level=0):
498
"""Convert a UTC datetime.datetime() to a D-Bus type."""
499
return dbus.String(dt.isoformat(),
500
variant_level=variant_level)
501
502
def enable(self):
503
oldstate = getattr(self, u"enabled", False)
504
r = Client.enable(self)
505
if oldstate != self.enabled:
506
# Emit D-Bus signals
507
self.PropertyChanged(dbus.String(u"enabled"),
508
dbus.Boolean(True, variant_level=1))
509
self.PropertyChanged(
510
dbus.String(u"last_enabled"),
511
self._datetime_to_dbus(self.last_enabled,
512
variant_level=1))
513
return r
514
515
def disable(self, signal = True):
516
oldstate = getattr(self, u"enabled", False)
517
r = Client.disable(self)
518
if signal and oldstate != self.enabled:
519
# Emit D-Bus signal
520
self.PropertyChanged(dbus.String(u"enabled"),
521
dbus.Boolean(False, variant_level=1))
522
return r
523
524
def __del__(self, *args, **kwargs):
525
try:
526
self.remove_from_connection()
527
except LookupError:
528
pass
529
if hasattr(dbus.service.Object, u"__del__"):
530
dbus.service.Object.__del__(self, *args, **kwargs)
531
Client.__del__(self, *args, **kwargs)
532
533
def checker_callback(self, pid, condition, command,
534
*args, **kwargs):
535
self.checker_callback_tag = None
536
self.checker = None
537
# Emit D-Bus signal
538
self.PropertyChanged(dbus.String(u"checker_running"),
539
dbus.Boolean(False, variant_level=1))
540
if os.WIFEXITED(condition):
541
exitstatus = os.WEXITSTATUS(condition)
542
# Emit D-Bus signal
543
self.CheckerCompleted(dbus.Int16(exitstatus),
544
dbus.Int64(condition),
545
dbus.String(command))
546
else:
547
# Emit D-Bus signal
548
self.CheckerCompleted(dbus.Int16(-1),
549
dbus.Int64(condition),
550
dbus.String(command))
551
552
return Client.checker_callback(self, pid, condition, command,
553
*args, **kwargs)
554
555
def checked_ok(self, *args, **kwargs):
556
r = Client.checked_ok(self, *args, **kwargs)
557
# Emit D-Bus signal
558
self.PropertyChanged(
559
dbus.String(u"last_checked_ok"),
560
(self._datetime_to_dbus(self.last_checked_ok,
561
variant_level=1)))
562
return r
563
564
def start_checker(self, *args, **kwargs):
565
old_checker = self.checker
566
if self.checker is not None:
567
old_checker_pid = self.checker.pid
568
else:
569
old_checker_pid = None
570
r = Client.start_checker(self, *args, **kwargs)
571
# Only if new checker process was started
572
if (self.checker is not None
573
and old_checker_pid != self.checker.pid):
574
# Emit D-Bus signal
575
self.CheckerStarted(self.current_checker_command)
576
self.PropertyChanged(
577
dbus.String(u"checker_running"),
578
dbus.Boolean(True, variant_level=1))
579
return r
580
581
def stop_checker(self, *args, **kwargs):
582
old_checker = getattr(self, u"checker", None)
583
r = Client.stop_checker(self, *args, **kwargs)
584
if (old_checker is not None
585
and getattr(self, u"checker", None) is None):
586
self.PropertyChanged(dbus.String(u"checker_running"),
587
dbus.Boolean(False, variant_level=1))
588
return r
589
590
## D-Bus methods & signals
591
_interface = u"se.bsnet.fukt.Mandos.Client"
592
593
# CheckedOK - method
594
@dbus.service.method(_interface)
595
def CheckedOK(self):
596
return self.checked_ok()
597
598
# CheckerCompleted - signal
599
@dbus.service.signal(_interface, signature=u"nxs")
600
def CheckerCompleted(self, exitcode, waitstatus, command):
601
"D-Bus signal"
602
pass
603
604
# CheckerStarted - signal
605
@dbus.service.signal(_interface, signature=u"s")
606
def CheckerStarted(self, command):
607
"D-Bus signal"
608
pass
609
610
# GetAllProperties - method
611
@dbus.service.method(_interface, out_signature=u"a{sv}")
612
def GetAllProperties(self):
613
"D-Bus method"
614
return dbus.Dictionary({
615
dbus.String(u"name"):
616
dbus.String(self.name, variant_level=1),
617
dbus.String(u"fingerprint"):
618
dbus.String(self.fingerprint, variant_level=1),
619
dbus.String(u"host"):
620
dbus.String(self.host, variant_level=1),
621
dbus.String(u"created"):
622
self._datetime_to_dbus(self.created,
623
variant_level=1),
624
dbus.String(u"last_enabled"):
625
(self._datetime_to_dbus(self.last_enabled,
626
variant_level=1)
627
if self.last_enabled is not None
628
else dbus.Boolean(False, variant_level=1)),
629
dbus.String(u"enabled"):
630
dbus.Boolean(self.enabled, variant_level=1),
631
dbus.String(u"last_checked_ok"):
632
(self._datetime_to_dbus(self.last_checked_ok,
633
variant_level=1)
634
if self.last_checked_ok is not None
635
else dbus.Boolean (False, variant_level=1)),
636
dbus.String(u"timeout"):
637
dbus.UInt64(self.timeout_milliseconds(),
638
variant_level=1),
639
dbus.String(u"interval"):
640
dbus.UInt64(self.interval_milliseconds(),
641
variant_level=1),
642
dbus.String(u"checker"):
643
dbus.String(self.checker_command,
644
variant_level=1),
645
dbus.String(u"checker_running"):
646
dbus.Boolean(self.checker is not None,
647
variant_level=1),
648
dbus.String(u"object_path"):
649
dbus.ObjectPath(self.dbus_object_path,
650
variant_level=1)
651
}, signature=u"sv")
652
653
# IsStillValid - method
654
@dbus.service.method(_interface, out_signature=u"b")
655
def IsStillValid(self):
656
return self.still_valid()
657
658
# PropertyChanged - signal
659
@dbus.service.signal(_interface, signature=u"sv")
660
def PropertyChanged(self, property, value):
661
"D-Bus signal"
662
pass
663
664
# ReceivedSecret - signal
665
@dbus.service.signal(_interface)
666
def ReceivedSecret(self):
667
"D-Bus signal"
668
pass
669
670
# Rejected - signal
671
@dbus.service.signal(_interface)
672
def Rejected(self):
673
"D-Bus signal"
674
pass
675
676
# SetChecker - method
677
@dbus.service.method(_interface, in_signature=u"s")
678
def SetChecker(self, checker):
679
"D-Bus setter method"
680
self.checker_command = checker
681
# Emit D-Bus signal
682
self.PropertyChanged(dbus.String(u"checker"),
683
dbus.String(self.checker_command,
684
variant_level=1))
685
686
# SetHost - method
687
@dbus.service.method(_interface, in_signature=u"s")
688
def SetHost(self, host):
689
"D-Bus setter method"
690
self.host = host
691
# Emit D-Bus signal
692
self.PropertyChanged(dbus.String(u"host"),
693
dbus.String(self.host, variant_level=1))
694
695
# SetInterval - method
696
@dbus.service.method(_interface, in_signature=u"t")
697
def SetInterval(self, milliseconds):
698
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
699
# Emit D-Bus signal
700
self.PropertyChanged(dbus.String(u"interval"),
701
(dbus.UInt64(self.interval_milliseconds(),
702
variant_level=1)))
703
704
# SetSecret - method
705
@dbus.service.method(_interface, in_signature=u"ay",
706
byte_arrays=True)
707
def SetSecret(self, secret):
708
"D-Bus setter method"
709
self.secret = str(secret)
710
711
# SetTimeout - method
712
@dbus.service.method(_interface, in_signature=u"t")
713
def SetTimeout(self, milliseconds):
714
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
715
# Emit D-Bus signal
716
self.PropertyChanged(dbus.String(u"timeout"),
717
(dbus.UInt64(self.timeout_milliseconds(),
718
variant_level=1)))
719
720
# Enable - method
721
@dbus.service.method(_interface)
722
def Enable(self):
723
"D-Bus method"
724
self.enable()
725
726
# StartChecker - method
727
@dbus.service.method(_interface)
728
def StartChecker(self):
729
"D-Bus method"
730
self.start_checker()
731
732
# Disable - method
733
@dbus.service.method(_interface)
734
def Disable(self):
735
"D-Bus method"
736
self.disable()
737
738
# StopChecker - method
739
@dbus.service.method(_interface)
740
def StopChecker(self):
741
self.stop_checker()
742
743
del _interface
744
745
746
class ClientHandler(socketserver.BaseRequestHandler, object):
747
"""A class to handle client connections.
748
749
Instantiated once for each connection to handle it.
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.
750
446
Note: This will run in its own forked process."""
751
447
752
448
def handle(self):
753
449
logger.info(u"TCP connection from: %s",
754
unicode(self.client_address))
755
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
756
# Open IPC pipe to parent process
757
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
758
session = (gnutls.connection
759
.ClientSession(self.request,
760
gnutls.connection
761
.X509Credentials()))
762
763
line = self.request.makefile().readline()
764
logger.debug(u"Protocol version: %r", line)
765
try:
766
if int(line.strip().split()[0]) > 1:
767
raise RuntimeError
768
except (ValueError, IndexError, RuntimeError), error:
769
logger.error(u"Unknown protocol version: %s", error)
770
return
771
772
# Note: gnutls.connection.X509Credentials is really a
773
# generic GnuTLS certificate credentials object so long as
774
# no X.509 keys are added to it. Therefore, we can use it
775
# here despite using OpenPGP certificates.
776
777
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
778
# u"+AES-256-CBC", u"+SHA1",
779
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
780
# u"+DHE-DSS"))
781
# Use a fallback default, since this MUST be set.
782
priority = self.server.gnutls_priority
783
if priority is None:
784
priority = u"NORMAL"
785
(gnutls.library.functions
786
.gnutls_priority_set_direct(session._c_object,
787
priority, None))
788
789
try:
790
session.handshake()
791
except gnutls.errors.GNUTLSError, error:
792
logger.warning(u"Handshake failed: %s", error)
793
# Do not run session.bye() here: the session is not
794
# established. Just abandon the request.
795
return
796
logger.debug(u"Handshake succeeded")
797
try:
798
fpr = self.fingerprint(self.peer_certificate(session))
799
except (TypeError, gnutls.errors.GNUTLSError), error:
800
logger.warning(u"Bad certificate: %s", error)
801
session.bye()
802
return
803
logger.debug(u"Fingerprint: %s", fpr)
804
805
for c in self.server.clients:
806
if c.fingerprint == fpr:
807
client = c
808
break
809
else:
810
ipc.write(u"NOTFOUND %s\n" % fpr)
811
session.bye()
812
return
813
# Have to check if client.still_valid(), since it is
814
# possible that the client timed out while establishing
815
# the GnuTLS session.
816
if not client.still_valid():
817
ipc.write(u"INVALID %s\n" % client.name)
818
session.bye()
819
return
820
ipc.write(u"SENDING %s\n" % client.name)
821
sent_size = 0
822
while sent_size < len(client.secret):
823
sent = session.send(client.secret[sent_size:])
824
logger.debug(u"Sent: %d, remaining: %d",
825
sent, len(client.secret)
826
- (sent_size + sent))
827
sent_size += sent
828
session.bye()
829
830
@staticmethod
831
def peer_certificate(session):
832
"Return the peer's OpenPGP certificate as a bytestring"
833
# If not an OpenPGP certificate...
834
if (gnutls.library.functions
835
.gnutls_certificate_type_get(session._c_object)
836
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
837
# ...do the normal thing
838
return session.peer_certificate
839
list_size = ctypes.c_uint(1)
840
cert_list = (gnutls.library.functions
841
.gnutls_certificate_get_peers
842
(session._c_object, ctypes.byref(list_size)))
843
if not bool(cert_list) and list_size.value != 0:
844
raise gnutls.errors.GNUTLSError(u"error getting peer"
845
u" certificate")
846
if list_size.value == 0:
847
return None
848
cert = cert_list[0]
849
return ctypes.string_at(cert.data, cert.size)
850
851
@staticmethod
852
def fingerprint(openpgp):
853
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
854
# New GnuTLS "datum" with the OpenPGP public key
855
datum = (gnutls.library.types
856
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
857
ctypes.POINTER
858
(ctypes.c_ubyte)),
859
ctypes.c_uint(len(openpgp))))
860
# New empty GnuTLS certificate
861
crt = gnutls.library.types.gnutls_openpgp_crt_t()
862
(gnutls.library.functions
863
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
864
# Import the OpenPGP public key into the certificate
865
(gnutls.library.functions
866
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
867
gnutls.library.constants
868
.GNUTLS_OPENPGP_FMT_RAW))
869
# Verify the self signature in the key
870
crtverify = ctypes.c_uint()
871
(gnutls.library.functions
872
.gnutls_openpgp_crt_verify_self(crt, 0,
873
ctypes.byref(crtverify)))
874
if crtverify.value != 0:
875
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
876
raise (gnutls.errors.CertificateSecurityError
877
(u"Verify failed"))
878
# New buffer for the fingerprint
879
buf = ctypes.create_string_buffer(20)
880
buf_len = ctypes.c_size_t()
881
# Get the fingerprint from the certificate into the buffer
882
(gnutls.library.functions
883
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
884
ctypes.byref(buf_len)))
885
# Deinit the certificate
886
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
887
# Convert the buffer to a Python bytestring
888
fpr = ctypes.string_at(buf, buf_len.value)
889
# Convert the bytestring to hexadecimal notation
890
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
891
return hex_fpr
892
893
894
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
895
"""Like socketserver.ForkingMixIn, but also pass a pipe.
896
897
Assumes a gobject.MainLoop event loop.
898
"""
899
def process_request(self, request, client_address):
900
"""Overrides and wraps the original process_request().
901
902
This function creates a new pipe in self.pipe
903
"""
904
self.pipe = os.pipe()
905
super(ForkingMixInWithPipe,
906
self).process_request(request, client_address)
907
os.close(self.pipe[1]) # close write end
908
# Call "handle_ipc" for both data and EOF events
909
gobject.io_add_watch(self.pipe[0],
910
gobject.IO_IN | gobject.IO_HUP,
911
self.handle_ipc)
912
def handle_ipc(source, condition):
913
"""Dummy function; override as necessary"""
914
os.close(source)
915
return False
916
917
918
class IPv6_TCPServer(ForkingMixInWithPipe,
919
socketserver.TCPServer, object):
920
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
921
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.
922
522
Attributes:
523
settings: Server settings
524
clients: Set() of Client objects
923
525
enabled: Boolean; whether this server is activated yet
924
interface: None or a network interface name (string)
925
use_ipv6: Boolean; to use IPv6 or not
926
----
927
clients: set of Client objects
928
gnutls_priority GnuTLS priority string
929
use_dbus: Boolean; to emit D-Bus signals or not
930
526
"""
931
def __init__(self, server_address, RequestHandlerClass,
932
interface=None, use_ipv6=True, clients=None,
933
gnutls_priority=None, use_dbus=True):
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"]
934
535
self.enabled = False
935
self.interface = interface
936
if use_ipv6:
937
self.address_family = socket.AF_INET6
938
self.clients = clients
939
self.use_dbus = use_dbus
940
self.gnutls_priority = gnutls_priority
941
socketserver.TCPServer.__init__(self, server_address,
942
RequestHandlerClass)
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
943
537
def server_bind(self):
944
538
"""This overrides the normal server_bind() function
945
539
to bind to an interface if one was specified, and also NOT to
946
540
bind to an address or port if they were not specified."""
947
if self.interface is not None:
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
948
544
try:
949
545
self.socket.setsockopt(socket.SOL_SOCKET,
950
546
SO_BINDTODEVICE,
951
str(self.interface + u'\0'))
547
self.settings["interface"])
952
548
except socket.error, error:
953
549
if error[0] == errno.EPERM:
954
550
logger.error(u"No permission to"
955
551
u" bind to interface %s",
956
self.interface)
552
self.settings["interface"])
957
553
else:
958
raise
554
raise error
959
555
# Only bind(2) the socket if we really need to.
960
556
if self.server_address[0] or self.server_address[1]:
961
557
if not self.server_address[0]:
962
if self.address_family == socket.AF_INET6:
963
any_address = u"::" # in6addr_any
964
else:
965
any_address = socket.INADDR_ANY
966
self.server_address = (any_address,
558
in6addr_any = "::"
559
self.server_address = (in6addr_any,
967
560
self.server_address[1])
968
561
elif not self.server_address[1]:
969
562
self.server_address = (self.server_address[0],
970
563
0)
971
# if self.interface:
564
# if self.settings["interface"]:
972
565
# self.server_address = (self.server_address[0],
973
566
# 0, # port
974
567
# 0, # flowinfo
975
568
# if_nametoindex
976
# (self.interface))
977
return socketserver.TCPServer.server_bind(self)
569
# (self.settings
570
# ["interface"]))
571
return super(IPv6_TCPServer, self).server_bind()
978
572
def server_activate(self):
979
573
if self.enabled:
980
return socketserver.TCPServer.server_activate(self)
574
return super(IPv6_TCPServer, self).server_activate()
981
575
def enable(self):
982
576
self.enabled = True
983
def handle_ipc(self, source, condition, file_objects={}):
984
condition_names = {
985
gobject.IO_IN: u"IN", # There is data to read.
986
gobject.IO_OUT: u"OUT", # Data can be written (without
987
# blocking).
988
gobject.IO_PRI: u"PRI", # There is urgent data to read.
989
gobject.IO_ERR: u"ERR", # Error condition.
990
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
991
# broken, usually for pipes and
992
# sockets).
993
}
994
conditions_string = ' | '.join(name
995
for cond, name in
996
condition_names.iteritems()
997
if cond & condition)
998
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
999
conditions_string)
1000
1001
# Turn the pipe file descriptor into a Python file object
1002
if source not in file_objects:
1003
file_objects[source] = os.fdopen(source, u"r", 1)
1004
1005
# Read a line from the file object
1006
cmdline = file_objects[source].readline()
1007
if not cmdline: # Empty line means end of file
1008
# close the IPC pipe
1009
file_objects[source].close()
1010
del file_objects[source]
1011
1012
# Stop calling this function
1013
return False
1014
1015
logger.debug(u"IPC command: %r", cmdline)
1016
1017
# Parse and act on command
1018
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1019
1020
if cmd == u"NOTFOUND":
1021
logger.warning(u"Client not found for fingerprint: %s",
1022
args)
1023
if self.use_dbus:
1024
# Emit D-Bus signal
1025
mandos_dbus_service.ClientNotFound(args)
1026
elif cmd == u"INVALID":
1027
for client in self.clients:
1028
if client.name == args:
1029
logger.warning(u"Client %s is invalid", args)
1030
if self.use_dbus:
1031
# Emit D-Bus signal
1032
client.Rejected()
1033
break
1034
else:
1035
logger.error(u"Unknown client %s is invalid", args)
1036
elif cmd == u"SENDING":
1037
for client in self.clients:
1038
if client.name == args:
1039
logger.info(u"Sending secret to %s", client.name)
1040
client.checked_ok()
1041
if self.use_dbus:
1042
# Emit D-Bus signal
1043
client.ReceivedSecret()
1044
break
1045
else:
1046
logger.error(u"Sending secret to unknown client %s",
1047
args)
1048
else:
1049
logger.error(u"Unknown IPC command: %r", cmdline)
1050
1051
# Keep calling this function
1052
return True
1053
577
1054
578
1055
579
def string_to_delta(interval):
1056
580
"""Parse a string and return a datetime.timedelta
1057
1058
>>> string_to_delta(u'7d')
581
582
>>> string_to_delta('7d')
1059
583
datetime.timedelta(7)
1060
>>> string_to_delta(u'60s')
584
>>> string_to_delta('60s')
1061
585
datetime.timedelta(0, 60)
1062
>>> string_to_delta(u'60m')
586
>>> string_to_delta('60m')
1063
587
datetime.timedelta(0, 3600)
1064
>>> string_to_delta(u'24h')
588
>>> string_to_delta('24h')
1065
589
datetime.timedelta(1)
1066
590
>>> string_to_delta(u'1w')
1067
591
datetime.timedelta(7)
1068
>>> string_to_delta(u'5m 30s')
592
>>> string_to_delta('5m 30s')
1069
593
datetime.timedelta(0, 330)
1070
594
"""
1071
595
timevalue = datetime.timedelta(0)
1091
615
return timevalue
1092
616
1093
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
1094
641
def if_nametoindex(interface):
1095
"""Call the C function if_nametoindex(), or equivalent
1096
1097
Note: This function cannot accept a unicode string."""
642
"""Call the C function if_nametoindex(), or equivalent"""
1098
643
global if_nametoindex
1099
644
try:
1100
if_nametoindex = (ctypes.cdll.LoadLibrary
1101
(ctypes.util.find_library(u"c"))
1102
.if_nametoindex)
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
1103
647
except (OSError, AttributeError):
1104
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
1105
652
def if_nametoindex(interface):
1106
653
"Get an interface index the hard way, i.e. using fcntl()"
1107
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1108
with closing(socket.socket()) as s:
1109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1110
struct.pack(str(u"16s16x"),
1111
interface))
1112
interface_index = struct.unpack(str(u"I"),
1113
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]
1114
660
return interface_index
1115
661
return if_nametoindex(interface)
1116
662
1117
663
1118
664
def daemon(nochdir = False, noclose = False):
1119
665
"""See daemon(3). Standard BSD Unix function.
1120
1121
666
This should really exist as os.daemon, but it doesn't (yet)."""
1122
667
if os.fork():
1123
668
sys.exit()
1124
669
os.setsid()
1125
670
if not nochdir:
1126
os.chdir(u"/")
671
os.chdir("/")
1127
672
if os.fork():
1128
673
sys.exit()
1129
674
if not noclose:
1131
676
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1132
677
if not stat.S_ISCHR(os.fstat(null).st_mode):
1133
678
raise OSError(errno.ENODEV,
1134
u"/dev/null not a character device")
679
"/dev/null not a character device")
1135
680
os.dup2(null, sys.stdin.fileno())
1136
681
os.dup2(null, sys.stdout.fileno())
1137
682
os.dup2(null, sys.stderr.fileno())
1140
685
1141
686
1142
687
def main():
1143
1144
######################################################################
1145
# Parsing of options, both command line and config file
1146
1147
parser = optparse.OptionParser(version = "%%prog %s" % version)
1148
parser.add_option("-i", u"--interface", type=u"string",
1149
metavar="IF", help=u"Bind to interface IF")
1150
parser.add_option("-a", u"--address", type=u"string",
1151
help=u"Address to listen for requests on")
1152
parser.add_option("-p", u"--port", type=u"int",
1153
help=u"Port number to receive requests on")
1154
parser.add_option("--check", action=u"store_true",
1155
help=u"Run self-test")
1156
parser.add_option("--debug", action=u"store_true",
1157
help=u"Debug mode; run in foreground and log to"
1158
u" terminal")
1159
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1160
u" priority string (see GnuTLS documentation)")
1161
parser.add_option("--servicename", type=u"string",
1162
metavar=u"NAME", help=u"Zeroconf service name")
1163
parser.add_option("--configdir", type=u"string",
1164
default=u"/etc/mandos", metavar=u"DIR",
1165
help=u"Directory to search for configuration"
1166
u" files")
1167
parser.add_option("--no-dbus", action=u"store_false",
1168
dest=u"use_dbus", help=u"Do not provide D-Bus"
1169
u" system bus interface")
1170
parser.add_option("--no-ipv6", action=u"store_false",
1171
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")
1172
708
options = parser.parse_args()[0]
1173
709
1174
710
if options.check:
1177
713
sys.exit()
1178
714
1179
715
# Default values for config file for server-global settings
1180
server_defaults = { u"interface": u"",
1181
u"address": u"",
1182
u"port": u"",
1183
u"debug": u"False",
1184
u"priority":
1185
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1186
u"servicename": u"Mandos",
1187
u"use_dbus": u"True",
1188
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",
1189
723
}
1190
724
1191
725
# Parse config file for server-global settings
1192
server_config = configparser.SafeConfigParser(server_defaults)
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
1193
727
del server_defaults
1194
server_config.read(os.path.join(options.configdir,
1195
u"mandos.conf"))
728
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1196
729
# Convert the SafeConfigParser object to a dict
1197
730
server_settings = server_config.defaults()
1198
# Use the appropriate methods on the non-string config options
1199
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1200
server_settings[option] = server_config.getboolean(u"DEFAULT",
1201
option)
1202
if server_settings["port"]:
1203
server_settings["port"] = server_config.getint(u"DEFAULT",
1204
u"port")
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
733
("DEFAULT", "debug")
1205
734
del server_config
1206
735
1207
736
# Override the settings from the config file with command line
1208
737
# options, if set.
1209
for option in (u"interface", u"address", u"port", u"debug",
1210
u"priority", u"servicename", u"configdir",
1211
u"use_dbus", u"use_ipv6"):
738
for option in ("interface", "address", "port", "debug",
739
"priority", "servicename", "configdir"):
1212
740
value = getattr(options, option)
1213
741
if value is not None:
1214
742
server_settings[option] = value
1215
743
del options
1216
# Force all strings to be unicode
1217
for option in server_settings.keys():
1218
if type(server_settings[option]) is str:
1219
server_settings[option] = unicode(server_settings[option])
1220
744
# Now we have our good server settings in "server_settings"
1221
745
1222
##################################################################
1223
1224
# For convenience
1225
debug = server_settings[u"debug"]
1226
use_dbus = server_settings[u"use_dbus"]
1227
use_ipv6 = server_settings[u"use_ipv6"]
746
debug = server_settings["debug"]
1228
747
1229
748
if not debug:
1230
749
syslogger.setLevel(logging.WARNING)
1231
750
console.setLevel(logging.WARNING)
1232
751
1233
if server_settings[u"servicename"] != u"Mandos":
1234
syslogger.setFormatter(logging.Formatter
1235
(u'Mandos (%s) [%%(process)d]:'
1236
u' %%(levelname)s: %%(message)s'
1237
% 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"]))
1238
757
1239
758
# Parse config file with clients
1240
client_defaults = { u"timeout": u"1h",
1241
u"interval": u"5m",
1242
u"checker": u"fping -q -- %%(host)s",
1243
u"host": u"",
759
client_defaults = { "timeout": "1h",
760
"interval": "5m",
761
"checker": "fping -q -- %(host)s",
762
"host": "",
1244
763
}
1245
client_config = configparser.SafeConfigParser(client_defaults)
1246
client_config.read(os.path.join(server_settings[u"configdir"],
1247
u"clients.conf"))
1248
1249
global mandos_dbus_service
1250
mandos_dbus_service = None
1251
1252
clients = set()
1253
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1254
server_settings[u"port"]),
1255
ClientHandler,
1256
interface=
1257
server_settings[u"interface"],
1258
use_ipv6=use_ipv6,
1259
clients=clients,
1260
gnutls_priority=
1261
server_settings[u"priority"],
1262
use_dbus=use_dbus)
1263
pidfilename = u"/var/run/mandos.pid"
1264
try:
1265
pidfile = open(pidfilename, u"w")
1266
except IOError:
1267
logger.error(u"Could not open file %r", pidfilename)
1268
1269
try:
1270
uid = pwd.getpwnam(u"_mandos").pw_uid
1271
gid = pwd.getpwnam(u"_mandos").pw_gid
1272
except KeyError:
1273
try:
1274
uid = pwd.getpwnam(u"mandos").pw_uid
1275
gid = pwd.getpwnam(u"mandos").pw_gid
1276
except KeyError:
1277
try:
1278
uid = pwd.getpwnam(u"nobody").pw_uid
1279
gid = pwd.getpwnam(u"nobody").pw_gid
1280
except KeyError:
1281
uid = 65534
1282
gid = 65534
1283
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)
1284
798
os.setgid(gid)
1285
os.setuid(uid)
1286
799
except OSError, error:
1287
800
if error[0] != errno.EPERM:
1288
801
raise error
1289
802
1290
# Enable all possible GnuTLS debugging
1291
if debug:
1292
# "Use a log level over 10 to enable all debugging options."
1293
# - GnuTLS manual
1294
gnutls.library.functions.gnutls_global_set_log_level(11)
1295
1296
@gnutls.library.types.gnutls_log_func
1297
def debug_gnutls(level, string):
1298
logger.debug(u"GnuTLS: %s", string[:-1])
1299
1300
(gnutls.library.functions
1301
.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"])
1302
809
1303
810
global main_loop
811
global bus
812
global server
1304
813
# From the Avahi example code
1305
814
DBusGMainLoop(set_as_default=True )
1306
815
main_loop = gobject.MainLoop()
1307
816
bus = dbus.SystemBus()
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
1308
820
# End of Avahi example code
1309
if use_dbus:
1310
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1311
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1312
service = AvahiService(name = server_settings[u"servicename"],
1313
servicetype = u"_mandos._tcp",
1314
protocol = protocol, bus = bus)
1315
if server_settings["interface"]:
1316
service.interface = (if_nametoindex
1317
(str(server_settings[u"interface"])))
1318
1319
client_class = Client
1320
if use_dbus:
1321
client_class = functools.partial(ClientDBus, bus = bus)
1322
clients.update(set(
1323
client_class(name = section,
1324
config= dict(client_config.items(section)))
1325
for section in client_config.sections()))
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()))
1326
833
if not clients:
1327
logger.warning(u"No clients defined")
834
logger.critical(u"No clients defined")
835
sys.exit(1)
1328
836
1329
837
if debug:
1330
838
# Redirect stdin so all checkers get /dev/null
1339
847
daemon()
1340
848
1341
849
try:
1342
with closing(pidfile):
1343
pid = os.getpid()
1344
pidfile.write(str(pid) + "\n")
850
pid = os.getpid()
851
pidfile.write(str(pid) + "\n")
852
pidfile.close()
1345
853
del pidfile
1346
854
except IOError:
1347
855
logger.error(u"Could not write to file %r with PID %d",
1353
861
1354
862
def cleanup():
1355
863
"Cleanup function; run on exit"
1356
service.cleanup()
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
1357
870
1358
871
while clients:
1359
872
client = clients.pop()
1360
client.disable_hook = None
1361
client.disable()
873
client.stop_hook = None
874
client.stop()
1362
875
1363
876
atexit.register(cleanup)
1364
877
1367
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1368
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1369
882
1370
if use_dbus:
1371
class MandosDBusService(dbus.service.Object):
1372
"""A D-Bus proxy object"""
1373
def __init__(self):
1374
dbus.service.Object.__init__(self, bus, u"/")
1375
_interface = u"se.bsnet.fukt.Mandos"
1376
1377
@dbus.service.signal(_interface, signature=u"oa{sv}")
1378
def ClientAdded(self, objpath, properties):
1379
"D-Bus signal"
1380
pass
1381
1382
@dbus.service.signal(_interface, signature=u"s")
1383
def ClientNotFound(self, fingerprint):
1384
"D-Bus signal"
1385
pass
1386
1387
@dbus.service.signal(_interface, signature=u"os")
1388
def ClientRemoved(self, objpath, name):
1389
"D-Bus signal"
1390
pass
1391
1392
@dbus.service.method(_interface, out_signature=u"ao")
1393
def GetAllClients(self):
1394
"D-Bus method"
1395
return dbus.Array(c.dbus_object_path for c in clients)
1396
1397
@dbus.service.method(_interface,
1398
out_signature=u"a{oa{sv}}")
1399
def GetAllClientsWithProperties(self):
1400
"D-Bus method"
1401
return dbus.Dictionary(
1402
((c.dbus_object_path, c.GetAllProperties())
1403
for c in clients),
1404
signature=u"oa{sv}")
1405
1406
@dbus.service.method(_interface, in_signature=u"o")
1407
def RemoveClient(self, object_path):
1408
"D-Bus method"
1409
for c in clients:
1410
if c.dbus_object_path == object_path:
1411
clients.remove(c)
1412
c.remove_from_connection()
1413
# Don't signal anything except ClientRemoved
1414
c.disable(signal=False)
1415
# Emit D-Bus signal
1416
self.ClientRemoved(object_path, c.name)
1417
return
1418
raise KeyError
1419
1420
del _interface
1421
1422
mandos_dbus_service = MandosDBusService()
1423
1424
883
for client in clients:
1425
if use_dbus:
1426
# Emit D-Bus signal
1427
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1428
client.GetAllProperties())
1429
client.enable()
884
client.start()
1430
885
1431
886
tcp_server.enable()
1432
887
tcp_server.server_activate()
1433
888
1434
889
# Find out what port we got
1435
890
service.port = tcp_server.socket.getsockname()[1]
1436
if use_ipv6:
1437
logger.info(u"Now listening on address %r, port %d,"
1438
" flowinfo %d, scope_id %d"
1439
% tcp_server.socket.getsockname())
1440
else: # IPv4
1441
logger.info(u"Now listening on address %r, port %d"
1442
% 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())
1443
893
1444
894
#service.interface = tcp_server.socket.getsockname()[3]
1445
895
1446
896
try:
1447
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
1448
899
try:
1449
service.activate()
900
server_state_changed(server.GetState())
1450
901
except dbus.exceptions.DBusException, error:
1451
902
logger.critical(u"DBusException: %s", error)
1452
903
sys.exit(1)
1454
905
1455
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1456
907
lambda *args, **kwargs:
1457
(tcp_server.handle_request
1458
(*args[2:], **kwargs) or True))
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
1459
910
1460
911
logger.debug(u"Starting main loop")
1461
912
main_loop.run()
1462
913
except AvahiError, error:
1463
logger.critical(u"AvahiError: %s", error)
914
logger.critical(u"AvahiError: %s" + unicode(error))
1464
915
sys.exit(1)
1465
916
except KeyboardInterrupt:
1466
917
if debug:
1467
print >> sys.stderr
1468
logger.debug(u"Server received KeyboardInterrupt")
1469
logger.debug(u"Server exiting")
918
print
1470
919
1471
920
if __name__ == '__main__':
1472
921
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0