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- Committer: Teddy Hogeborn
- Date: 2008-09-13 15:36:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20080913153618-atp386q2bqj0ku99
* Makefile (install-client-nokey): Do "&&" instead of ";" to catch
errors.
* README: Kill the straight quotes. Add copyright notice.
* overview.xml: Improved wording.
errors.
* README: Kill the straight quotes. Add copyright notice.
* overview.xml: Improved wording.
- files added:
- etc-plugins.d-README
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files modified:
- .bzrignore
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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
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
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
59
63
60
import dbus
64
import dbus.service
65
61
import gobject
66
62
import avahi
67
63
from dbus.mainloop.glib import DBusGMainLoop
68
64
import ctypes
69
import ctypes.util
70
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'))
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'))
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
def __str__(self):
85
return repr(self.value)
104
86
105
87
class AvahiServiceError(AvahiError):
106
88
pass
111
93
112
94
class AvahiService(object):
113
95
"""An Avahi (Zeroconf) service.
114
115
96
Attributes:
116
97
interface: integer; avahi.IF_UNSPEC or an interface index.
117
98
Used to optionally bind to the specified interface.
118
name: string; Example: u'Mandos'
119
type: string; Example: u'_mandos._tcp'.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
120
101
See <http://www.dns-sd.org/ServiceTypes.html>
121
102
port: integer; what port to announce
122
103
TXT: list of strings; TXT record for the service
125
106
max_renames: integer; maximum number of renames
126
107
rename_count: integer; counter so we only rename after collisions
127
108
a sensible number of times
128
group: D-Bus Entry Group
129
server: D-Bus Server
130
109
"""
131
110
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):
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
135
113
self.interface = interface
136
114
self.name = name
137
self.type = servicetype
115
self.type = type
138
116
self.port = port
139
self.TXT = TXT if TXT is not None else []
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
140
121
self.domain = domain
141
122
self.host = host
142
123
self.rename_count = 0
143
124
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
125
def rename(self):
149
126
"""Derived from the Avahi example code"""
150
127
if self.rename_count >= self.max_renames:
151
128
logger.critical(u"No suitable Zeroconf service name found"
152
129
u" after %i retries, exiting.",
153
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
130
rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
156
133
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))
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
162
138
self.remove()
163
139
self.add()
164
140
self.rename_count += 1
165
141
def remove(self):
166
142
"""Derived from the Avahi example code"""
167
if self.group is not None:
168
self.group.Reset()
143
if group is not None:
144
group.Reset()
169
145
def add(self):
170
146
"""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)
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
178
155
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())
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
225
170
226
171
227
172
class Client(object):
228
173
"""A representation of a client host served by this server.
229
230
174
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
175
name: string; from the config file, used in log messages
233
176
fingerprint: string (40 or 32 hexadecimal digits); used to
234
177
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.
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
248
189
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
190
stop_initiator_tag: - '' -
250
191
checker_callback_tag: - '' -
251
192
checker_command: string; External command which is run to check if
252
193
client lives. %() expansions are done at
253
194
runtime with vars(self) as dict, so that for
254
195
instance %(name)s can be used in the command.
255
current_checker_command: string; current running checker_command
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
256
201
"""
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):
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
274
226
"""Note: the 'checker' key in 'config' sets the
275
227
'checker_command' attribute and *not* the 'checker'
276
228
attribute."""
277
229
self.name = name
278
if config is None:
279
config = {}
280
230
logger.debug(u"Creating client %r", self.name)
281
231
# Uppercase and remove spaces from fingerprint for later
282
232
# comparison purposes with return value from the fingerprint()
283
233
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
286
236
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()
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
294
243
else:
295
244
raise TypeError(u"No secret or secfile for client %s"
296
245
% 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
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
301
248
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
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
305
252
self.checker = None
306
253
self.checker_initiator_tag = None
307
self.disable_initiator_tag = None
254
self.stop_initiator_tag = None
308
255
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):
256
self.check_command = config["checker"]
257
def start(self):
314
258
"""Start this client's checker and timeout hooks"""
315
self.last_enabled = datetime.datetime.utcnow()
316
259
# Schedule a new checker to be started an 'interval' from now,
317
260
# and every interval from then on.
318
self.checker_initiator_tag = (gobject.timeout_add
319
(self.interval_milliseconds(),
320
self.start_checker))
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
321
264
# Also start a new checker *right now*.
322
265
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):
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
332
279
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):
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
338
284
gobject.source_remove(self.checker_initiator_tag)
339
285
self.checker_initiator_tag = None
340
286
self.stop_checker()
341
if self.disable_hook:
342
self.disable_hook(self)
343
self.enabled = False
287
if self.stop_hook:
288
self.stop_hook(self)
344
289
# Do not run this again if called by a gobject.timeout_add
345
290
return False
346
347
291
def __del__(self):
348
self.disable_hook = None
349
self.disable()
350
351
def checker_callback(self, pid, condition, command):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
352
295
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
353
297
self.checker_callback_tag = None
354
298
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:
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
365
309
logger.warning(u"Checker for %(name)s crashed?",
366
310
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
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
380
314
def start_checker(self):
381
315
"""Start a new checker subprocess if one is not running.
382
383
316
If a checker already exists, leave it running and do
384
317
nothing."""
385
318
# The reason for not killing a running checker is that if we
390
323
# checkers alone, the checker would have to take more time
391
324
# than 'timeout' for the client to be declared invalid, which
392
325
# 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
326
if self.checker is None:
404
327
try:
405
# In case checker_command has exactly one % operator
406
command = self.checker_command % self.host
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
407
330
except TypeError:
408
331
# Escape attributes for the shell
409
escaped_attrs = dict((key,
410
re.escape(unicode(str(val),
411
errors=
412
u'replace')))
332
escaped_attrs = dict((key, re.escape(str(val)))
413
333
for key, val in
414
334
vars(self).iteritems())
415
335
try:
416
command = self.checker_command % escaped_attrs
336
command = self.check_command % escaped_attrs
417
337
except TypeError, error:
418
338
logger.error(u'Could not format string "%s":'
419
u' %s', self.checker_command, error)
339
u' %s', self.check_command, error)
420
340
return True # Try again later
421
self.current_checker_command = command
422
341
try:
423
342
logger.info(u"Starting checker %r for %s",
424
343
command, self.name)
428
347
# always replaced by /dev/null.)
429
348
self.checker = subprocess.Popen(command,
430
349
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)
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
442
354
except OSError, error:
443
355
logger.error(u"Failed to start subprocess: %s",
444
356
error)
445
357
# Re-run this periodically if run by gobject.timeout_add
446
358
return True
447
448
359
def stop_checker(self):
449
360
"""Force the checker process, if any, to stop."""
450
361
if self.checker_callback_tag:
451
362
gobject.source_remove(self.checker_callback_tag)
452
363
self.checker_callback_tag = None
453
if getattr(self, u"checker", None) is None:
364
if getattr(self, "checker", None) is None:
454
365
return
455
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
456
367
try:
462
373
if error.errno != errno.ESRCH: # No such process
463
374
raise
464
375
self.checker = None
465
466
376
def still_valid(self):
467
377
"""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()
378
now = datetime.datetime.now()
471
379
if self.last_checked_ok is None:
472
380
return now < (self.created + self.timeout)
473
381
else:
474
382
return now < (self.last_checked_ok + self.timeout)
475
383
476
384
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.
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
750
442
Note: This will run in its own forked process."""
751
443
752
444
def handle(self):
753
445
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
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
922
518
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
923
521
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
522
"""
931
def __init__(self, server_address, RequestHandlerClass,
932
interface=None, use_ipv6=True, clients=None,
933
gnutls_priority=None, use_dbus=True):
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
934
531
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)
532
return super(type(self), self).__init__(*args, **kwargs)
943
533
def server_bind(self):
944
534
"""This overrides the normal server_bind() function
945
535
to bind to an interface if one was specified, and also NOT to
946
536
bind to an address or port if they were not specified."""
947
if self.interface is not None:
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
948
540
try:
949
541
self.socket.setsockopt(socket.SOL_SOCKET,
950
542
SO_BINDTODEVICE,
951
str(self.interface + u'\0'))
543
self.settings["interface"])
952
544
except socket.error, error:
953
545
if error[0] == errno.EPERM:
954
546
logger.error(u"No permission to"
955
547
u" bind to interface %s",
956
self.interface)
548
self.settings["interface"])
957
549
else:
958
raise
550
raise error
959
551
# Only bind(2) the socket if we really need to.
960
552
if self.server_address[0] or self.server_address[1]:
961
553
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,
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
967
556
self.server_address[1])
968
557
elif not self.server_address[1]:
969
558
self.server_address = (self.server_address[0],
970
559
0)
971
# if self.interface:
560
# if self.settings["interface"]:
972
561
# self.server_address = (self.server_address[0],
973
562
# 0, # port
974
563
# 0, # flowinfo
975
564
# if_nametoindex
976
# (self.interface))
977
return socketserver.TCPServer.server_bind(self)
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
978
568
def server_activate(self):
979
569
if self.enabled:
980
return socketserver.TCPServer.server_activate(self)
570
return super(type(self), self).server_activate()
981
571
def enable(self):
982
572
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
573
1054
574
1055
575
def string_to_delta(interval):
1056
576
"""Parse a string and return a datetime.timedelta
1057
1058
>>> string_to_delta(u'7d')
577
578
>>> string_to_delta('7d')
1059
579
datetime.timedelta(7)
1060
>>> string_to_delta(u'60s')
580
>>> string_to_delta('60s')
1061
581
datetime.timedelta(0, 60)
1062
>>> string_to_delta(u'60m')
582
>>> string_to_delta('60m')
1063
583
datetime.timedelta(0, 3600)
1064
>>> string_to_delta(u'24h')
584
>>> string_to_delta('24h')
1065
585
datetime.timedelta(1)
1066
586
>>> string_to_delta(u'1w')
1067
587
datetime.timedelta(7)
1068
>>> string_to_delta(u'5m 30s')
588
>>> string_to_delta('5m 30s')
1069
589
datetime.timedelta(0, 330)
1070
590
"""
1071
591
timevalue = datetime.timedelta(0)
1072
592
for s in interval.split():
1073
593
try:
1074
suffix = unicode(s[-1])
1075
value = int(s[:-1])
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
1076
596
if suffix == u"d":
1077
597
delta = datetime.timedelta(value)
1078
598
elif suffix == u"s":
1091
611
return timevalue
1092
612
1093
613
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
1094
637
def if_nametoindex(interface):
1095
"""Call the C function if_nametoindex(), or equivalent
1096
1097
Note: This function cannot accept a unicode string."""
638
"""Call the C function if_nametoindex(), or equivalent"""
1098
639
global if_nametoindex
1099
640
try:
1100
if_nametoindex = (ctypes.cdll.LoadLibrary
1101
(ctypes.util.find_library(u"c"))
1102
.if_nametoindex)
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
1103
645
except (OSError, AttributeError):
1104
logger.warning(u"Doing if_nametoindex the hard way")
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
1105
650
def if_nametoindex(interface):
1106
651
"Get an interface index the hard way, i.e. using fcntl()"
1107
652
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]
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
1114
658
return interface_index
1115
659
return if_nametoindex(interface)
1116
660
1117
661
1118
662
def daemon(nochdir = False, noclose = False):
1119
663
"""See daemon(3). Standard BSD Unix function.
1120
1121
664
This should really exist as os.daemon, but it doesn't (yet)."""
1122
665
if os.fork():
1123
666
sys.exit()
1124
667
os.setsid()
1125
668
if not nochdir:
1126
os.chdir(u"/")
669
os.chdir("/")
1127
670
if os.fork():
1128
671
sys.exit()
1129
672
if not noclose:
1131
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1132
675
if not stat.S_ISCHR(os.fstat(null).st_mode):
1133
676
raise OSError(errno.ENODEV,
1134
u"/dev/null not a character device")
677
"/dev/null not a character device")
1135
678
os.dup2(null, sys.stdin.fileno())
1136
679
os.dup2(null, sys.stdout.fileno())
1137
680
os.dup2(null, sys.stderr.fileno())
1140
683
1141
684
1142
685
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")
1172
options = parser.parse_args()[0]
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
1173
710
1174
711
if options.check:
1175
712
import doctest
1177
714
sys.exit()
1178
715
1179
716
# 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",
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
1189
724
}
1190
725
1191
726
# Parse config file for server-global settings
1192
server_config = configparser.SafeConfigParser(server_defaults)
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1193
728
del server_defaults
1194
server_config.read(os.path.join(options.configdir,
1195
u"mandos.conf"))
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1196
730
# Convert the SafeConfigParser object to a dict
1197
731
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")
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1205
735
del server_config
1206
736
1207
737
# Override the settings from the config file with command line
1208
738
# 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"):
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
1212
741
value = getattr(options, option)
1213
742
if value is not None:
1214
743
server_settings[option] = value
1215
744
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
745
# Now we have our good server settings in "server_settings"
1221
746
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"]
747
debug = server_settings["debug"]
1228
748
1229
749
if not debug:
1230
750
syslogger.setLevel(logging.WARNING)
1231
751
console.setLevel(logging.WARNING)
1232
752
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"]))
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
1238
758
1239
759
# 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"",
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
1244
764
}
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:
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
767
"clients.conf"))
768
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
798
os.setuid(uid)
1284
799
os.setgid(gid)
1285
os.setuid(uid)
1286
800
except OSError, error:
1287
801
if error[0] != errno.EPERM:
1288
802
raise error
1289
803
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))
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
1302
810
1303
811
global main_loop
812
global bus
813
global server
1304
814
# From the Avahi example code
1305
815
DBusGMainLoop(set_as_default=True )
1306
816
main_loop = gobject.MainLoop()
1307
817
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
1308
821
# 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()))
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
1326
834
if not clients:
1327
logger.warning(u"No clients defined")
835
logger.critical(u"No clients defined")
836
sys.exit(1)
1328
837
1329
838
if debug:
1330
839
# Redirect stdin so all checkers get /dev/null
1339
848
daemon()
1340
849
1341
850
try:
1342
with closing(pidfile):
1343
pid = os.getpid()
1344
pidfile.write(str(pid) + "\n")
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
1345
854
del pidfile
1346
except IOError:
855
except IOError, err:
1347
856
logger.error(u"Could not write to file %r with PID %d",
1348
857
pidfilename, pid)
1349
858
except NameError:
1353
862
1354
863
def cleanup():
1355
864
"Cleanup function; run on exit"
1356
service.cleanup()
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
1357
871
1358
872
while clients:
1359
873
client = clients.pop()
1360
client.disable_hook = None
1361
client.disable()
874
client.stop_hook = None
875
client.stop()
1362
876
1363
877
atexit.register(cleanup)
1364
878
1367
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1368
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1369
883
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
884
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()
885
client.start()
1430
886
1431
887
tcp_server.enable()
1432
888
tcp_server.server_activate()
1433
889
1434
890
# Find out what port we got
1435
891
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())
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
1443
894
1444
895
#service.interface = tcp_server.socket.getsockname()[3]
1445
896
1446
897
try:
1447
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
1448
900
try:
1449
service.activate()
901
server_state_changed(server.GetState())
1450
902
except dbus.exceptions.DBusException, error:
1451
903
logger.critical(u"DBusException: %s", error)
1452
904
sys.exit(1)
1454
906
1455
907
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1456
908
lambda *args, **kwargs:
1457
(tcp_server.handle_request
1458
(*args[2:], **kwargs) or True))
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
1459
911
1460
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
1461
914
main_loop.run()
1462
915
except AvahiError, error:
1463
logger.critical(u"AvahiError: %s", error)
916
logger.critical(u"AvahiError: %s" + unicode(error))
1464
917
sys.exit(1)
1465
918
except KeyboardInterrupt:
1466
919
if debug:
1467
print >> sys.stderr
1468
logger.debug(u"Server received KeyboardInterrupt")
1469
logger.debug(u"Server exiting")
920
print
1470
921
1471
922
if __name__ == '__main__':
1472
923
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0