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- Committer: Teddy Hogeborn
- Date: 2008-09-30 07:23:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20080930072339-jn15gyrtfpdk2dhx
* .bzrignore: Added "man" directory (created by "make install-html").
* Makefile: Add "common.ent" dependency to all manual pages.
(htmldir, version, SED): New variables.
(CFLAGS): Add -D option to define VERSION to $(version).
(MANPOST, HTMLPOST): Use $(SED).
(PROGS): Use $(CPROGS)
(CPROGS): New; C-only programs.
(objects): Use $(CPROGS).
(common.ent, mandos, mandos-keygen): New targets; update version
number to $(version).
(clean): Use $(CPROGS).
(check): Depend on "all".
(install-html): Install to $(htmldir).
* common.ent: New file with "version" entity.
* mandos-clients.conf.xml: Use "common.ent".
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.xml: - '' -
* plugin-runner.c (argp_program_version): Use VERSION.
* plugins.d/mandos-client.c (argp_program_version): - '' -
* plugins.d/password-prompt.c (argp_program_version): - '' -
* Makefile: Add "common.ent" dependency to all manual pages.
(htmldir, version, SED): New variables.
(CFLAGS): Add -D option to define VERSION to $(version).
(MANPOST, HTMLPOST): Use $(SED).
(PROGS): Use $(CPROGS)
(CPROGS): New; C-only programs.
(objects): Use $(CPROGS).
(common.ent, mandos, mandos-keygen): New targets; update version
number to $(version).
(clean): Use $(CPROGS).
(check): Depend on "all".
(install-html): Install to $(htmldir).
* common.ent: New file with "version" entity.
* mandos-clients.conf.xml: Use "common.ent".
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.xml: - '' -
* plugin-runner.c (argp_program_version): Use VERSION.
* plugins.d/mandos-client.c (argp_program_version): - '' -
* plugins.d/password-prompt.c (argp_program_version): - '' -
- files added:
- debian/mandos-client.config
- files removed:
- NEWS
- 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 © 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
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# 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
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63
import ctypes
69
64
import ctypes.util
70
import xml.dom.minidom
71
import inspect
72
73
try:
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
except AttributeError:
76
try:
77
from IN import SO_BINDTODEVICE
78
except ImportError:
79
SO_BINDTODEVICE = None
80
81
82
version = "1.0.12"
83
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
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'))
91
74
logger.addHandler(syslogger)
92
75
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console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
97
79
logger.addHandler(console)
98
80
99
81
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
101
83
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
105
87
106
88
class AvahiServiceError(AvahiError):
107
89
pass
112
94
113
95
class AvahiService(object):
114
96
"""An Avahi (Zeroconf) service.
115
116
97
Attributes:
117
98
interface: integer; avahi.IF_UNSPEC or an interface index.
118
99
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
121
102
See <http://www.dns-sd.org/ServiceTypes.html>
122
103
port: integer; what port to announce
123
104
TXT: list of strings; TXT record for the service
126
107
max_renames: integer; maximum number of renames
127
108
rename_count: integer; counter so we only rename after collisions
128
109
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
110
"""
133
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
137
114
self.interface = interface
138
115
self.name = name
139
116
self.type = servicetype
140
117
self.port = port
141
self.TXT = TXT if TXT is not None else []
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
142
122
self.domain = domain
143
123
self.host = host
144
124
self.rename_count = 0
145
125
self.max_renames = max_renames
146
self.protocol = protocol
147
self.group = None # our entry group
148
self.server = None
149
self.bus = bus
150
126
def rename(self):
151
127
"""Derived from the Avahi example code"""
152
128
if self.rename_count >= self.max_renames:
153
129
logger.critical(u"No suitable Zeroconf service name found"
154
130
u" after %i retries, exiting.",
155
131
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
158
134
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
164
139
self.remove()
165
140
self.add()
166
141
self.rename_count += 1
167
142
def remove(self):
168
143
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
144
if group is not None:
145
group.Reset()
171
146
def add(self):
172
147
"""Derived from the Avahi example code"""
173
if self.group is None:
174
self.group = dbus.Interface(
175
self.bus.get_object(avahi.DBUS_NAME,
176
self.server.EntryGroupNew()),
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.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)
181
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
182
self.name, self.type)
183
self.group.AddService(
184
self.interface,
185
self.protocol,
186
dbus.UInt32(0), # flags
187
self.name, self.type,
188
self.domain, self.host,
189
dbus.UInt16(self.port),
190
avahi.string_array_to_txt_array(self.TXT))
191
self.group.Commit()
192
def entry_group_state_changed(self, state, error):
193
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
195
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
198
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
200
self.rename()
201
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
203
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
205
% unicode(error))
206
def cleanup(self):
207
"""Derived from the Avahi example code"""
208
if self.group is not None:
209
self.group.Free()
210
self.group = None
211
def server_state_changed(self, state):
212
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
216
elif state == avahi.SERVER_RUNNING:
217
self.add()
218
def activate(self):
219
"""Derived from the Avahi example code"""
220
if self.server is None:
221
self.server = dbus.Interface(
222
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
224
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
227
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
228
171
229
172
230
173
class Client(object):
231
174
"""A representation of a client host served by this server.
232
233
175
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
176
name: string; from the config file, used in log messages
236
177
fingerprint: string (40 or 32 hexadecimal digits); used to
237
178
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
248
checker: subprocess.Popen(); a running checker process used
249
to see if the client lives.
250
'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.
251
190
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
191
stop_initiator_tag: - '' -
253
192
checker_callback_tag: - '' -
254
193
checker_command: string; External command which is run to check if
255
194
client lives. %() expansions are done at
256
195
runtime with vars(self) as dict, so that for
257
196
instance %(name)s can be used in the command.
258
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: - '' -
259
202
"""
260
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
267
268
def timeout_milliseconds(self):
269
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
271
272
def interval_milliseconds(self):
273
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
275
276
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):
277
227
"""Note: the 'checker' key in 'config' sets the
278
228
'checker_command' attribute and *not* the 'checker'
279
229
attribute."""
280
self.name = name
281
230
if config is None:
282
231
config = {}
232
self.name = name
283
233
logger.debug(u"Creating client %r", self.name)
284
234
# Uppercase and remove spaces from fingerprint for later
285
235
# comparison purposes with return value from the fingerprint()
286
236
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
289
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])),
296
"rb")) as secfile:
297
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(config["secfile"])
244
self.secret = secfile.read()
245
secfile.close()
298
246
else:
299
247
raise TypeError(u"No secret or secfile for client %s"
300
248
% self.name)
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
249
self.host = config.get("host", "")
250
self.created = datetime.datetime.now()
305
251
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.stop_hook = stop_hook
309
255
self.checker = None
310
256
self.checker_initiator_tag = None
311
self.disable_initiator_tag = None
257
self.stop_initiator_tag = None
312
258
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
316
317
def enable(self):
259
self.check_command = config["checker"]
260
def start(self):
318
261
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
322
self.last_enabled = datetime.datetime.utcnow()
323
262
# Schedule a new checker to be started an 'interval' from now,
324
263
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
264
self.checker_initiator_tag = gobject.timeout_add\
265
(self._interval_milliseconds,
266
self.start_checker)
328
267
# Also start a new checker *right now*.
329
268
self.start_checker()
330
# Schedule a disable() when 'timeout' has passed
331
self.disable_initiator_tag = (gobject.timeout_add
332
(self.timeout_milliseconds(),
333
self.disable))
334
self.enabled = True
335
336
def disable(self):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
269
# Schedule a stop() when 'timeout' has passed
270
self.stop_initiator_tag = gobject.timeout_add\
271
(self._timeout_milliseconds,
272
self.stop)
273
def stop(self):
274
"""Stop this client.
275
The possibility that a client might be restarted is left open,
276
but not currently used."""
277
# If this client doesn't have a secret, it is already stopped.
278
if hasattr(self, "secret") and self.secret:
279
logger.info(u"Stopping client %s", self.name)
280
self.secret = None
281
else:
339
282
return False
340
logger.info(u"Disabling client %s", self.name)
341
if getattr(self, u"disable_initiator_tag", False):
342
gobject.source_remove(self.disable_initiator_tag)
343
self.disable_initiator_tag = None
344
if getattr(self, u"checker_initiator_tag", False):
283
if getattr(self, "stop_initiator_tag", False):
284
gobject.source_remove(self.stop_initiator_tag)
285
self.stop_initiator_tag = None
286
if getattr(self, "checker_initiator_tag", False):
345
287
gobject.source_remove(self.checker_initiator_tag)
346
288
self.checker_initiator_tag = None
347
289
self.stop_checker()
348
if self.disable_hook:
349
self.disable_hook(self)
350
self.enabled = False
290
if self.stop_hook:
291
self.stop_hook(self)
351
292
# Do not run this again if called by a gobject.timeout_add
352
293
return False
353
354
294
def __del__(self):
355
self.disable_hook = None
356
self.disable()
357
358
def checker_callback(self, pid, condition, command):
295
self.stop_hook = None
296
self.stop()
297
def checker_callback(self, pid, condition):
359
298
"""The checker has completed, so take appropriate actions."""
299
now = datetime.datetime.now()
360
300
self.checker_callback_tag = None
361
301
self.checker = None
362
if os.WIFEXITED(condition):
363
exitstatus = os.WEXITSTATUS(condition)
364
if exitstatus == 0:
365
logger.info(u"Checker for %(name)s succeeded",
366
vars(self))
367
self.checked_ok()
368
else:
369
logger.info(u"Checker for %(name)s failed",
370
vars(self))
371
else:
302
if os.WIFEXITED(condition) \
303
and (os.WEXITSTATUS(condition) == 0):
304
logger.info(u"Checker for %(name)s succeeded",
305
vars(self))
306
self.last_checked_ok = now
307
gobject.source_remove(self.stop_initiator_tag)
308
self.stop_initiator_tag = gobject.timeout_add\
309
(self._timeout_milliseconds,
310
self.stop)
311
elif not os.WIFEXITED(condition):
372
312
logger.warning(u"Checker for %(name)s crashed?",
373
313
vars(self))
374
375
def checked_ok(self):
376
"""Bump up the timeout for this client.
377
378
This should only be called when the client has been seen,
379
alive and well.
380
"""
381
self.last_checked_ok = datetime.datetime.utcnow()
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = (gobject.timeout_add
384
(self.timeout_milliseconds(),
385
self.disable))
386
314
else:
315
logger.info(u"Checker for %(name)s failed",
316
vars(self))
387
317
def start_checker(self):
388
318
"""Start a new checker subprocess if one is not running.
389
390
319
If a checker already exists, leave it running and do
391
320
nothing."""
392
321
# The reason for not killing a running checker is that if we
397
326
# checkers alone, the checker would have to take more time
398
327
# than 'timeout' for the client to be declared invalid, which
399
328
# is as it should be.
400
401
# If a checker exists, make sure it is not a zombie
402
try:
403
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
404
except (AttributeError, OSError), error:
405
if (isinstance(error, OSError)
406
and error.errno != errno.ECHILD):
407
raise error
408
else:
409
if pid:
410
logger.warning(u"Checker was a zombie")
411
gobject.source_remove(self.checker_callback_tag)
412
self.checker_callback(pid, status,
413
self.current_checker_command)
414
# Start a new checker if needed
415
329
if self.checker is None:
416
330
try:
417
# In case checker_command has exactly one % operator
418
command = self.checker_command % self.host
331
# In case check_command has exactly one % operator
332
command = self.check_command % self.host
419
333
except TypeError:
420
334
# Escape attributes for the shell
421
escaped_attrs = dict((key,
422
re.escape(unicode(str(val),
423
errors=
424
u'replace')))
335
escaped_attrs = dict((key, re.escape(str(val)))
425
336
for key, val in
426
337
vars(self).iteritems())
427
338
try:
428
command = self.checker_command % escaped_attrs
339
command = self.check_command % escaped_attrs
429
340
except TypeError, error:
430
341
logger.error(u'Could not format string "%s":'
431
u' %s', self.checker_command, error)
342
u' %s', self.check_command, error)
432
343
return True # Try again later
433
self.current_checker_command = command
434
344
try:
435
345
logger.info(u"Starting checker %r for %s",
436
346
command, self.name)
440
350
# always replaced by /dev/null.)
441
351
self.checker = subprocess.Popen(command,
442
352
close_fds=True,
443
shell=True, cwd=u"/")
444
self.checker_callback_tag = (gobject.child_watch_add
445
(self.checker.pid,
446
self.checker_callback,
447
data=command))
448
# The checker may have completed before the gobject
449
# watch was added. Check for this.
450
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
451
if pid:
452
gobject.source_remove(self.checker_callback_tag)
453
self.checker_callback(pid, status, command)
353
shell=True, cwd="/")
354
self.checker_callback_tag = gobject.child_watch_add\
355
(self.checker.pid,
356
self.checker_callback)
454
357
except OSError, error:
455
358
logger.error(u"Failed to start subprocess: %s",
456
359
error)
457
360
# Re-run this periodically if run by gobject.timeout_add
458
361
return True
459
460
362
def stop_checker(self):
461
363
"""Force the checker process, if any, to stop."""
462
364
if self.checker_callback_tag:
463
365
gobject.source_remove(self.checker_callback_tag)
464
366
self.checker_callback_tag = None
465
if getattr(self, u"checker", None) is None:
367
if getattr(self, "checker", None) is None:
466
368
return
467
369
logger.debug(u"Stopping checker for %(name)s", vars(self))
468
370
try:
474
376
if error.errno != errno.ESRCH: # No such process
475
377
raise
476
378
self.checker = None
477
478
379
def still_valid(self):
479
380
"""Has the timeout not yet passed for this client?"""
480
if not getattr(self, u"enabled", False):
481
return False
482
now = datetime.datetime.utcnow()
381
now = datetime.datetime.now()
483
382
if self.last_checked_ok is None:
484
383
return now < (self.created + self.timeout)
485
384
else:
486
385
return now < (self.last_checked_ok + self.timeout)
487
386
488
387
489
def dbus_service_property(dbus_interface, signature=u"v",
490
access=u"readwrite", byte_arrays=False):
491
"""Decorators for marking methods of a DBusObjectWithProperties to
492
become properties on the D-Bus.
493
494
The decorated method will be called with no arguments by "Get"
495
and with one argument by "Set".
496
497
The parameters, where they are supported, are the same as
498
dbus.service.method, except there is only "signature", since the
499
type from Get() and the type sent to Set() is the same.
500
"""
501
def decorator(func):
502
func._dbus_is_property = True
503
func._dbus_interface = dbus_interface
504
func._dbus_signature = signature
505
func._dbus_access = access
506
func._dbus_name = func.__name__
507
if func._dbus_name.endswith(u"_dbus_property"):
508
func._dbus_name = func._dbus_name[:-14]
509
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
510
return func
511
return decorator
512
513
514
class DBusPropertyException(dbus.exceptions.DBusException):
515
"""A base class for D-Bus property-related exceptions
516
"""
517
def __unicode__(self):
518
return unicode(str(self))
519
520
521
class DBusPropertyAccessException(DBusPropertyException):
522
"""A property's access permissions disallows an operation.
523
"""
524
pass
525
526
527
class DBusPropertyNotFound(DBusPropertyException):
528
"""An attempt was made to access a non-existing property.
529
"""
530
pass
531
532
533
class DBusObjectWithProperties(dbus.service.Object):
534
"""A D-Bus object with properties.
535
536
Classes inheriting from this can use the dbus_service_property
537
decorator to expose methods as D-Bus properties. It exposes the
538
standard Get(), Set(), and GetAll() methods on the D-Bus.
539
"""
540
541
@staticmethod
542
def _is_dbus_property(obj):
543
return getattr(obj, u"_dbus_is_property", False)
544
545
def _get_all_dbus_properties(self):
546
"""Returns a generator of (name, attribute) pairs
547
"""
548
return ((prop._dbus_name, prop)
549
for name, prop in
550
inspect.getmembers(self, self._is_dbus_property))
551
552
def _get_dbus_property(self, interface_name, property_name):
553
"""Returns a bound method if one exists which is a D-Bus
554
property with the specified name and interface.
555
"""
556
for name in (property_name,
557
property_name + u"_dbus_property"):
558
prop = getattr(self, name, None)
559
if (prop is None
560
or not self._is_dbus_property(prop)
561
or prop._dbus_name != property_name
562
or (interface_name and prop._dbus_interface
563
and interface_name != prop._dbus_interface)):
564
continue
565
return prop
566
# No such property
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
569
+ property_name)
570
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
572
out_signature=u"v")
573
def Get(self, interface_name, property_name):
574
"""Standard D-Bus property Get() method, see D-Bus standard.
575
"""
576
prop = self._get_dbus_property(interface_name, property_name)
577
if prop._dbus_access == u"write":
578
raise DBusPropertyAccessException(property_name)
579
value = prop()
580
if not hasattr(value, u"variant_level"):
581
return value
582
return type(value)(value, variant_level=value.variant_level+1)
583
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
585
def Set(self, interface_name, property_name, value):
586
"""Standard D-Bus property Set() method, see D-Bus standard.
587
"""
588
prop = self._get_dbus_property(interface_name, property_name)
589
if prop._dbus_access == u"read":
590
raise DBusPropertyAccessException(property_name)
591
if prop._dbus_get_args_options[u"byte_arrays"]:
592
value = dbus.ByteArray(''.join(unichr(byte)
593
for byte in value))
594
prop(value)
595
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
598
def GetAll(self, interface_name):
599
"""Standard D-Bus property GetAll() method, see D-Bus
600
standard.
601
602
Note: Will not include properties with access="write".
603
"""
604
all = {}
605
for name, prop in self._get_all_dbus_properties():
606
if (interface_name
607
and interface_name != prop._dbus_interface):
608
# Interface non-empty but did not match
609
continue
610
# Ignore write-only properties
611
if prop._dbus_access == u"write":
612
continue
613
value = prop()
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
616
continue
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
620
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
622
out_signature=u"s",
623
path_keyword='object_path',
624
connection_keyword='connection')
625
def Introspect(self, object_path, connection):
626
"""Standard D-Bus method, overloaded to insert property tags.
627
"""
628
xmlstring = dbus.service.Object.Introspect(self, object_path,
629
connection)
630
document = xml.dom.minidom.parseString(xmlstring)
631
del xmlstring
632
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
637
return e
638
for if_tag in document.getElementsByTagName(u"interface"):
639
for tag in (make_tag(document, name, prop)
640
for name, prop
641
in self._get_all_dbus_properties()
642
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
644
if_tag.appendChild(tag)
645
xmlstring = document.toxml(u"utf-8")
646
document.unlink()
647
return xmlstring
648
649
650
class ClientDBus(Client, DBusObjectWithProperties):
651
"""A Client class using D-Bus
652
653
Attributes:
654
dbus_object_path: dbus.ObjectPath
655
bus: dbus.SystemBus()
656
"""
657
# dbus.service.Object doesn't use super(), so we can't either.
658
659
def __init__(self, bus = None, *args, **kwargs):
660
self.bus = bus
661
Client.__init__(self, *args, **kwargs)
662
# Only now, when this client is initialized, can it show up on
663
# the D-Bus
664
self.dbus_object_path = (dbus.ObjectPath
665
(u"/clients/"
666
+ self.name.replace(u".", u"_")))
667
DBusObjectWithProperties.__init__(self, self.bus,
668
self.dbus_object_path)
669
670
@staticmethod
671
def _datetime_to_dbus(dt, variant_level=0):
672
"""Convert a UTC datetime.datetime() to a D-Bus type."""
673
return dbus.String(dt.isoformat(),
674
variant_level=variant_level)
675
676
def enable(self):
677
oldstate = getattr(self, u"enabled", False)
678
r = Client.enable(self)
679
if oldstate != self.enabled:
680
# Emit D-Bus signals
681
self.PropertyChanged(dbus.String(u"enabled"),
682
dbus.Boolean(True, variant_level=1))
683
self.PropertyChanged(
684
dbus.String(u"last_enabled"),
685
self._datetime_to_dbus(self.last_enabled,
686
variant_level=1))
687
return r
688
689
def disable(self, signal = True):
690
oldstate = getattr(self, u"enabled", False)
691
r = Client.disable(self)
692
if signal and oldstate != self.enabled:
693
# Emit D-Bus signal
694
self.PropertyChanged(dbus.String(u"enabled"),
695
dbus.Boolean(False, variant_level=1))
696
return r
697
698
def __del__(self, *args, **kwargs):
699
try:
700
self.remove_from_connection()
701
except LookupError:
702
pass
703
if hasattr(DBusObjectWithProperties, u"__del__"):
704
DBusObjectWithProperties.__del__(self, *args, **kwargs)
705
Client.__del__(self, *args, **kwargs)
706
707
def checker_callback(self, pid, condition, command,
708
*args, **kwargs):
709
self.checker_callback_tag = None
710
self.checker = None
711
# Emit D-Bus signal
712
self.PropertyChanged(dbus.String(u"checker_running"),
713
dbus.Boolean(False, variant_level=1))
714
if os.WIFEXITED(condition):
715
exitstatus = os.WEXITSTATUS(condition)
716
# Emit D-Bus signal
717
self.CheckerCompleted(dbus.Int16(exitstatus),
718
dbus.Int64(condition),
719
dbus.String(command))
720
else:
721
# Emit D-Bus signal
722
self.CheckerCompleted(dbus.Int16(-1),
723
dbus.Int64(condition),
724
dbus.String(command))
725
726
return Client.checker_callback(self, pid, condition, command,
727
*args, **kwargs)
728
729
def checked_ok(self, *args, **kwargs):
730
r = Client.checked_ok(self, *args, **kwargs)
731
# Emit D-Bus signal
732
self.PropertyChanged(
733
dbus.String(u"last_checked_ok"),
734
(self._datetime_to_dbus(self.last_checked_ok,
735
variant_level=1)))
736
return r
737
738
def start_checker(self, *args, **kwargs):
739
old_checker = self.checker
740
if self.checker is not None:
741
old_checker_pid = self.checker.pid
742
else:
743
old_checker_pid = None
744
r = Client.start_checker(self, *args, **kwargs)
745
# Only if new checker process was started
746
if (self.checker is not None
747
and old_checker_pid != self.checker.pid):
748
# Emit D-Bus signal
749
self.CheckerStarted(self.current_checker_command)
750
self.PropertyChanged(
751
dbus.String(u"checker_running"),
752
dbus.Boolean(True, variant_level=1))
753
return r
754
755
def stop_checker(self, *args, **kwargs):
756
old_checker = getattr(self, u"checker", None)
757
r = Client.stop_checker(self, *args, **kwargs)
758
if (old_checker is not None
759
and getattr(self, u"checker", None) is None):
760
self.PropertyChanged(dbus.String(u"checker_running"),
761
dbus.Boolean(False, variant_level=1))
762
return r
763
764
## D-Bus methods & signals
765
_interface = u"se.bsnet.fukt.Mandos.Client"
766
767
# CheckedOK - method
768
@dbus.service.method(_interface)
769
def CheckedOK(self):
770
return self.checked_ok()
771
772
# CheckerCompleted - signal
773
@dbus.service.signal(_interface, signature=u"nxs")
774
def CheckerCompleted(self, exitcode, waitstatus, command):
775
"D-Bus signal"
776
pass
777
778
# CheckerStarted - signal
779
@dbus.service.signal(_interface, signature=u"s")
780
def CheckerStarted(self, command):
781
"D-Bus signal"
782
pass
783
784
# PropertyChanged - signal
785
@dbus.service.signal(_interface, signature=u"sv")
786
def PropertyChanged(self, property, value):
787
"D-Bus signal"
788
pass
789
790
# ReceivedSecret - signal
791
@dbus.service.signal(_interface)
792
def ReceivedSecret(self):
793
"D-Bus signal"
794
pass
795
796
# Rejected - signal
797
@dbus.service.signal(_interface)
798
def Rejected(self):
799
"D-Bus signal"
800
pass
801
802
# Enable - method
803
@dbus.service.method(_interface)
804
def Enable(self):
805
"D-Bus method"
806
self.enable()
807
808
# StartChecker - method
809
@dbus.service.method(_interface)
810
def StartChecker(self):
811
"D-Bus method"
812
self.start_checker()
813
814
# Disable - method
815
@dbus.service.method(_interface)
816
def Disable(self):
817
"D-Bus method"
818
self.disable()
819
820
# StopChecker - method
821
@dbus.service.method(_interface)
822
def StopChecker(self):
823
self.stop_checker()
824
825
# name - property
826
@dbus_service_property(_interface, signature=u"s", access=u"read")
827
def name_dbus_property(self):
828
return dbus.String(self.name)
829
830
# fingerprint - property
831
@dbus_service_property(_interface, signature=u"s", access=u"read")
832
def fingerprint_dbus_property(self):
833
return dbus.String(self.fingerprint)
834
835
# host - property
836
@dbus_service_property(_interface, signature=u"s",
837
access=u"readwrite")
838
def host_dbus_property(self, value=None):
839
if value is None: # get
840
return dbus.String(self.host)
841
self.host = value
842
# Emit D-Bus signal
843
self.PropertyChanged(dbus.String(u"host"),
844
dbus.String(value, variant_level=1))
845
846
# created - property
847
@dbus_service_property(_interface, signature=u"s", access=u"read")
848
def created_dbus_property(self):
849
return dbus.String(self._datetime_to_dbus(self.created))
850
851
# last_enabled - property
852
@dbus_service_property(_interface, signature=u"s", access=u"read")
853
def last_enabled_dbus_property(self):
854
if self.last_enabled is None:
855
return dbus.String(u"")
856
return dbus.String(self._datetime_to_dbus(self.last_enabled))
857
858
# enabled - property
859
@dbus_service_property(_interface, signature=u"b",
860
access=u"readwrite")
861
def enabled_dbus_property(self, value=None):
862
if value is None: # get
863
return dbus.Boolean(self.enabled)
864
if value:
865
self.enable()
866
else:
867
self.disable()
868
869
# last_checked_ok - property
870
@dbus_service_property(_interface, signature=u"s",
871
access=u"readwrite")
872
def last_checked_ok_dbus_property(self, value=None):
873
if value is not None:
874
self.checked_ok()
875
return
876
if self.last_checked_ok is None:
877
return dbus.String(u"")
878
return dbus.String(self._datetime_to_dbus(self
879
.last_checked_ok))
880
881
# timeout - property
882
@dbus_service_property(_interface, signature=u"t",
883
access=u"readwrite")
884
def timeout_dbus_property(self, value=None):
885
if value is None: # get
886
return dbus.UInt64(self.timeout_milliseconds())
887
self.timeout = datetime.timedelta(0, 0, 0, value)
888
# Emit D-Bus signal
889
self.PropertyChanged(dbus.String(u"timeout"),
890
dbus.UInt64(value, variant_level=1))
891
if getattr(self, u"disable_initiator_tag", None) is None:
892
return
893
# Reschedule timeout
894
gobject.source_remove(self.disable_initiator_tag)
895
self.disable_initiator_tag = None
896
time_to_die = (self.
897
_timedelta_to_milliseconds((self
898
.last_checked_ok
899
+ self.timeout)
900
- datetime.datetime
901
.utcnow()))
902
if time_to_die <= 0:
903
# The timeout has passed
904
self.disable()
905
else:
906
self.disable_initiator_tag = (gobject.timeout_add
907
(time_to_die, self.disable))
908
909
# interval - property
910
@dbus_service_property(_interface, signature=u"t",
911
access=u"readwrite")
912
def interval_dbus_property(self, value=None):
913
if value is None: # get
914
return dbus.UInt64(self.interval_milliseconds())
915
self.interval = datetime.timedelta(0, 0, 0, value)
916
# Emit D-Bus signal
917
self.PropertyChanged(dbus.String(u"interval"),
918
dbus.UInt64(value, variant_level=1))
919
if getattr(self, u"checker_initiator_tag", None) is None:
920
return
921
# Reschedule checker run
922
gobject.source_remove(self.checker_initiator_tag)
923
self.checker_initiator_tag = (gobject.timeout_add
924
(value, self.start_checker))
925
self.start_checker() # Start one now, too
926
927
# checker - property
928
@dbus_service_property(_interface, signature=u"s",
929
access=u"readwrite")
930
def checker_dbus_property(self, value=None):
931
if value is None: # get
932
return dbus.String(self.checker_command)
933
self.checker_command = value
934
# Emit D-Bus signal
935
self.PropertyChanged(dbus.String(u"checker"),
936
dbus.String(self.checker_command,
937
variant_level=1))
938
939
# checker_running - property
940
@dbus_service_property(_interface, signature=u"b",
941
access=u"readwrite")
942
def checker_running_dbus_property(self, value=None):
943
if value is None: # get
944
return dbus.Boolean(self.checker is not None)
945
if value:
946
self.start_checker()
947
else:
948
self.stop_checker()
949
950
# object_path - property
951
@dbus_service_property(_interface, signature=u"o", access=u"read")
952
def object_path_dbus_property(self):
953
return self.dbus_object_path # is already a dbus.ObjectPath
954
955
# secret = property
956
@dbus_service_property(_interface, signature=u"ay",
957
access=u"write", byte_arrays=True)
958
def secret_dbus_property(self, value):
959
self.secret = str(value)
960
961
del _interface
962
963
964
class ClientHandler(socketserver.BaseRequestHandler, object):
965
"""A class to handle client connections.
966
967
Instantiated once for each connection to handle it.
388
def peer_certificate(session):
389
"Return the peer's OpenPGP certificate as a bytestring"
390
# If not an OpenPGP certificate...
391
if gnutls.library.functions.gnutls_certificate_type_get\
392
(session._c_object) \
393
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
394
# ...do the normal thing
395
return session.peer_certificate
396
list_size = ctypes.c_uint()
397
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
398
(session._c_object, ctypes.byref(list_size))
399
if list_size.value == 0:
400
return None
401
cert = cert_list[0]
402
return ctypes.string_at(cert.data, cert.size)
403
404
405
def fingerprint(openpgp):
406
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
407
# New GnuTLS "datum" with the OpenPGP public key
408
datum = gnutls.library.types.gnutls_datum_t\
409
(ctypes.cast(ctypes.c_char_p(openpgp),
410
ctypes.POINTER(ctypes.c_ubyte)),
411
ctypes.c_uint(len(openpgp)))
412
# New empty GnuTLS certificate
413
crt = gnutls.library.types.gnutls_openpgp_crt_t()
414
gnutls.library.functions.gnutls_openpgp_crt_init\
415
(ctypes.byref(crt))
416
# Import the OpenPGP public key into the certificate
417
gnutls.library.functions.gnutls_openpgp_crt_import\
418
(crt, ctypes.byref(datum),
419
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
420
# Verify the self signature in the key
421
crtverify = ctypes.c_uint()
422
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
423
(crt, 0, ctypes.byref(crtverify))
424
if crtverify.value != 0:
425
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
426
raise gnutls.errors.CertificateSecurityError("Verify failed")
427
# New buffer for the fingerprint
428
buf = ctypes.create_string_buffer(20)
429
buf_len = ctypes.c_size_t()
430
# Get the fingerprint from the certificate into the buffer
431
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
432
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
433
# Deinit the certificate
434
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
435
# Convert the buffer to a Python bytestring
436
fpr = ctypes.string_at(buf, buf_len.value)
437
# Convert the bytestring to hexadecimal notation
438
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
439
return hex_fpr
440
441
442
class TCP_handler(SocketServer.BaseRequestHandler, object):
443
"""A TCP request handler class.
444
Instantiated by IPv6_TCPServer for each request to handle it.
968
445
Note: This will run in its own forked process."""
969
446
970
447
def handle(self):
971
448
logger.info(u"TCP connection from: %s",
972
unicode(self.client_address))
973
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
974
# Open IPC pipe to parent process
975
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
976
session = (gnutls.connection
977
.ClientSession(self.request,
978
gnutls.connection
979
.X509Credentials()))
980
981
line = self.request.makefile().readline()
982
logger.debug(u"Protocol version: %r", line)
983
try:
984
if int(line.strip().split()[0]) > 1:
985
raise RuntimeError
986
except (ValueError, IndexError, RuntimeError), error:
987
logger.error(u"Unknown protocol version: %s", error)
988
return
989
990
# Note: gnutls.connection.X509Credentials is really a
991
# generic GnuTLS certificate credentials object so long as
992
# no X.509 keys are added to it. Therefore, we can use it
993
# here despite using OpenPGP certificates.
994
995
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
996
# u"+AES-256-CBC", u"+SHA1",
997
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
998
# u"+DHE-DSS"))
999
# Use a fallback default, since this MUST be set.
1000
priority = self.server.gnutls_priority
1001
if priority is None:
1002
priority = u"NORMAL"
1003
(gnutls.library.functions
1004
.gnutls_priority_set_direct(session._c_object,
1005
priority, None))
1006
1007
try:
1008
session.handshake()
1009
except gnutls.errors.GNUTLSError, error:
1010
logger.warning(u"Handshake failed: %s", error)
1011
# Do not run session.bye() here: the session is not
1012
# established. Just abandon the request.
1013
return
1014
logger.debug(u"Handshake succeeded")
1015
try:
1016
fpr = self.fingerprint(self.peer_certificate(session))
1017
except (TypeError, gnutls.errors.GNUTLSError), error:
1018
logger.warning(u"Bad certificate: %s", error)
1019
session.bye()
1020
return
1021
logger.debug(u"Fingerprint: %s", fpr)
1022
1023
for c in self.server.clients:
1024
if c.fingerprint == fpr:
1025
client = c
1026
break
1027
else:
1028
ipc.write(u"NOTFOUND %s %s\n"
1029
% (fpr, unicode(self.client_address)))
1030
session.bye()
1031
return
1032
# Have to check if client.still_valid(), since it is
1033
# possible that the client timed out while establishing
1034
# the GnuTLS session.
1035
if not client.still_valid():
1036
ipc.write(u"INVALID %s\n" % client.name)
1037
session.bye()
1038
return
1039
ipc.write(u"SENDING %s\n" % client.name)
1040
sent_size = 0
1041
while sent_size < len(client.secret):
1042
sent = session.send(client.secret[sent_size:])
1043
logger.debug(u"Sent: %d, remaining: %d",
1044
sent, len(client.secret)
1045
- (sent_size + sent))
1046
sent_size += sent
1047
session.bye()
1048
1049
@staticmethod
1050
def peer_certificate(session):
1051
"Return the peer's OpenPGP certificate as a bytestring"
1052
# If not an OpenPGP certificate...
1053
if (gnutls.library.functions
1054
.gnutls_certificate_type_get(session._c_object)
1055
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1056
# ...do the normal thing
1057
return session.peer_certificate
1058
list_size = ctypes.c_uint(1)
1059
cert_list = (gnutls.library.functions
1060
.gnutls_certificate_get_peers
1061
(session._c_object, ctypes.byref(list_size)))
1062
if not bool(cert_list) and list_size.value != 0:
1063
raise gnutls.errors.GNUTLSError(u"error getting peer"
1064
u" certificate")
1065
if list_size.value == 0:
1066
return None
1067
cert = cert_list[0]
1068
return ctypes.string_at(cert.data, cert.size)
1069
1070
@staticmethod
1071
def fingerprint(openpgp):
1072
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1073
# New GnuTLS "datum" with the OpenPGP public key
1074
datum = (gnutls.library.types
1075
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1076
ctypes.POINTER
1077
(ctypes.c_ubyte)),
1078
ctypes.c_uint(len(openpgp))))
1079
# New empty GnuTLS certificate
1080
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1081
(gnutls.library.functions
1082
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1083
# Import the OpenPGP public key into the certificate
1084
(gnutls.library.functions
1085
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1086
gnutls.library.constants
1087
.GNUTLS_OPENPGP_FMT_RAW))
1088
# Verify the self signature in the key
1089
crtverify = ctypes.c_uint()
1090
(gnutls.library.functions
1091
.gnutls_openpgp_crt_verify_self(crt, 0,
1092
ctypes.byref(crtverify)))
1093
if crtverify.value != 0:
1094
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1095
raise (gnutls.errors.CertificateSecurityError
1096
(u"Verify failed"))
1097
# New buffer for the fingerprint
1098
buf = ctypes.create_string_buffer(20)
1099
buf_len = ctypes.c_size_t()
1100
# Get the fingerprint from the certificate into the buffer
1101
(gnutls.library.functions
1102
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1103
ctypes.byref(buf_len)))
1104
# Deinit the certificate
1105
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1106
# Convert the buffer to a Python bytestring
1107
fpr = ctypes.string_at(buf, buf_len.value)
1108
# Convert the bytestring to hexadecimal notation
1109
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1110
return hex_fpr
1111
1112
1113
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1114
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1115
def process_request(self, request, client_address):
1116
"""Overrides and wraps the original process_request().
1117
1118
This function creates a new pipe in self.pipe
1119
"""
1120
self.pipe = os.pipe()
1121
super(ForkingMixInWithPipe,
1122
self).process_request(request, client_address)
1123
os.close(self.pipe[1]) # close write end
1124
self.add_pipe(self.pipe[0])
1125
def add_pipe(self, pipe):
1126
"""Dummy function; override as necessary"""
1127
os.close(pipe)
1128
1129
1130
class IPv6_TCPServer(ForkingMixInWithPipe,
1131
socketserver.TCPServer, object):
1132
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1133
449
unicode(self.client_address))
450
session = gnutls.connection.ClientSession\
451
(self.request, gnutls.connection.X509Credentials())
452
453
line = self.request.makefile().readline()
454
logger.debug(u"Protocol version: %r", line)
455
try:
456
if int(line.strip().split()[0]) > 1:
457
raise RuntimeError
458
except (ValueError, IndexError, RuntimeError), error:
459
logger.error(u"Unknown protocol version: %s", error)
460
return
461
462
# Note: gnutls.connection.X509Credentials is really a generic
463
# GnuTLS certificate credentials object so long as no X.509
464
# keys are added to it. Therefore, we can use it here despite
465
# using OpenPGP certificates.
466
467
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
468
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
469
# "+DHE-DSS"))
470
priority = "NORMAL" # Fallback default, since this
471
# MUST be set.
472
if self.server.settings["priority"]:
473
priority = self.server.settings["priority"]
474
gnutls.library.functions.gnutls_priority_set_direct\
475
(session._c_object, priority, None)
476
477
try:
478
session.handshake()
479
except gnutls.errors.GNUTLSError, error:
480
logger.warning(u"Handshake failed: %s", error)
481
# Do not run session.bye() here: the session is not
482
# established. Just abandon the request.
483
return
484
try:
485
fpr = fingerprint(peer_certificate(session))
486
except (TypeError, gnutls.errors.GNUTLSError), error:
487
logger.warning(u"Bad certificate: %s", error)
488
session.bye()
489
return
490
logger.debug(u"Fingerprint: %s", fpr)
491
client = None
492
for c in self.server.clients:
493
if c.fingerprint == fpr:
494
client = c
495
break
496
if not client:
497
logger.warning(u"Client not found for fingerprint: %s",
498
fpr)
499
session.bye()
500
return
501
# Have to check if client.still_valid(), since it is possible
502
# that the client timed out while establishing the GnuTLS
503
# session.
504
if not client.still_valid():
505
logger.warning(u"Client %(name)s is invalid",
506
vars(client))
507
session.bye()
508
return
509
sent_size = 0
510
while sent_size < len(client.secret):
511
sent = session.send(client.secret[sent_size:])
512
logger.debug(u"Sent: %d, remaining: %d",
513
sent, len(client.secret)
514
- (sent_size + sent))
515
sent_size += sent
516
session.bye()
517
518
519
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
520
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1134
521
Attributes:
522
settings: Server settings
523
clients: Set() of Client objects
1135
524
enabled: Boolean; whether this server is activated yet
1136
interface: None or a network interface name (string)
1137
use_ipv6: Boolean; to use IPv6 or not
1138
525
"""
1139
def __init__(self, server_address, RequestHandlerClass,
1140
interface=None, use_ipv6=True):
1141
self.interface = interface
1142
if use_ipv6:
1143
self.address_family = socket.AF_INET6
1144
socketserver.TCPServer.__init__(self, server_address,
1145
RequestHandlerClass)
526
address_family = socket.AF_INET6
527
def __init__(self, *args, **kwargs):
528
if "settings" in kwargs:
529
self.settings = kwargs["settings"]
530
del kwargs["settings"]
531
if "clients" in kwargs:
532
self.clients = kwargs["clients"]
533
del kwargs["clients"]
534
self.enabled = False
535
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1146
536
def server_bind(self):
1147
537
"""This overrides the normal server_bind() function
1148
538
to bind to an interface if one was specified, and also NOT to
1149
539
bind to an address or port if they were not specified."""
1150
if self.interface is not None:
1151
if SO_BINDTODEVICE is None:
1152
logger.error(u"SO_BINDTODEVICE does not exist;"
1153
u" cannot bind to interface %s",
1154
self.interface)
1155
else:
1156
try:
1157
self.socket.setsockopt(socket.SOL_SOCKET,
1158
SO_BINDTODEVICE,
1159
str(self.interface
1160
+ u'\0'))
1161
except socket.error, error:
1162
if error[0] == errno.EPERM:
1163
logger.error(u"No permission to"
1164
u" bind to interface %s",
1165
self.interface)
1166
elif error[0] == errno.ENOPROTOOPT:
1167
logger.error(u"SO_BINDTODEVICE not available;"
1168
u" cannot bind to interface %s",
1169
self.interface)
1170
else:
1171
raise
540
if self.settings["interface"]:
541
# 25 is from /usr/include/asm-i486/socket.h
542
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
543
try:
544
self.socket.setsockopt(socket.SOL_SOCKET,
545
SO_BINDTODEVICE,
546
self.settings["interface"])
547
except socket.error, error:
548
if error[0] == errno.EPERM:
549
logger.error(u"No permission to"
550
u" bind to interface %s",
551
self.settings["interface"])
552
else:
553
raise error
1172
554
# Only bind(2) the socket if we really need to.
1173
555
if self.server_address[0] or self.server_address[1]:
1174
556
if not self.server_address[0]:
1175
if self.address_family == socket.AF_INET6:
1176
any_address = u"::" # in6addr_any
1177
else:
1178
any_address = socket.INADDR_ANY
1179
self.server_address = (any_address,
557
in6addr_any = "::"
558
self.server_address = (in6addr_any,
1180
559
self.server_address[1])
1181
560
elif not self.server_address[1]:
1182
561
self.server_address = (self.server_address[0],
1183
562
0)
1184
# if self.interface:
563
# if self.settings["interface"]:
1185
564
# self.server_address = (self.server_address[0],
1186
565
# 0, # port
1187
566
# 0, # flowinfo
1188
567
# if_nametoindex
1189
# (self.interface))
1190
return socketserver.TCPServer.server_bind(self)
1191
1192
1193
class MandosServer(IPv6_TCPServer):
1194
"""Mandos server.
1195
1196
Attributes:
1197
clients: set of Client objects
1198
gnutls_priority GnuTLS priority string
1199
use_dbus: Boolean; to emit D-Bus signals or not
1200
1201
Assumes a gobject.MainLoop event loop.
1202
"""
1203
def __init__(self, server_address, RequestHandlerClass,
1204
interface=None, use_ipv6=True, clients=None,
1205
gnutls_priority=None, use_dbus=True):
1206
self.enabled = False
1207
self.clients = clients
1208
if self.clients is None:
1209
self.clients = set()
1210
self.use_dbus = use_dbus
1211
self.gnutls_priority = gnutls_priority
1212
IPv6_TCPServer.__init__(self, server_address,
1213
RequestHandlerClass,
1214
interface = interface,
1215
use_ipv6 = use_ipv6)
568
# (self.settings
569
# ["interface"]))
570
return super(IPv6_TCPServer, self).server_bind()
1216
571
def server_activate(self):
1217
572
if self.enabled:
1218
return socketserver.TCPServer.server_activate(self)
573
return super(IPv6_TCPServer, self).server_activate()
1219
574
def enable(self):
1220
575
self.enabled = True
1221
def add_pipe(self, pipe):
1222
# Call "handle_ipc" for both data and EOF events
1223
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1224
self.handle_ipc)
1225
def handle_ipc(self, source, condition, file_objects={}):
1226
condition_names = {
1227
gobject.IO_IN: u"IN", # There is data to read.
1228
gobject.IO_OUT: u"OUT", # Data can be written (without
1229
# blocking).
1230
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1231
gobject.IO_ERR: u"ERR", # Error condition.
1232
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1233
# broken, usually for pipes and
1234
# sockets).
1235
}
1236
conditions_string = ' | '.join(name
1237
for cond, name in
1238
condition_names.iteritems()
1239
if cond & condition)
1240
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1241
conditions_string)
1242
1243
# Turn the pipe file descriptor into a Python file object
1244
if source not in file_objects:
1245
file_objects[source] = os.fdopen(source, u"r", 1)
1246
1247
# Read a line from the file object
1248
cmdline = file_objects[source].readline()
1249
if not cmdline: # Empty line means end of file
1250
# close the IPC pipe
1251
file_objects[source].close()
1252
del file_objects[source]
1253
1254
# Stop calling this function
1255
return False
1256
1257
logger.debug(u"IPC command: %r", cmdline)
1258
1259
# Parse and act on command
1260
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1261
1262
if cmd == u"NOTFOUND":
1263
logger.warning(u"Client not found for fingerprint: %s",
1264
args)
1265
if self.use_dbus:
1266
# Emit D-Bus signal
1267
mandos_dbus_service.ClientNotFound(args)
1268
elif cmd == u"INVALID":
1269
for client in self.clients:
1270
if client.name == args:
1271
logger.warning(u"Client %s is invalid", args)
1272
if self.use_dbus:
1273
# Emit D-Bus signal
1274
client.Rejected()
1275
break
1276
else:
1277
logger.error(u"Unknown client %s is invalid", args)
1278
elif cmd == u"SENDING":
1279
for client in self.clients:
1280
if client.name == args:
1281
logger.info(u"Sending secret to %s", client.name)
1282
client.checked_ok()
1283
if self.use_dbus:
1284
# Emit D-Bus signal
1285
client.ReceivedSecret()
1286
break
1287
else:
1288
logger.error(u"Sending secret to unknown client %s",
1289
args)
1290
else:
1291
logger.error(u"Unknown IPC command: %r", cmdline)
1292
1293
# Keep calling this function
1294
return True
1295
576
1296
577
1297
578
def string_to_delta(interval):
1298
579
"""Parse a string and return a datetime.timedelta
1299
1300
>>> string_to_delta(u'7d')
580
581
>>> string_to_delta('7d')
1301
582
datetime.timedelta(7)
1302
>>> string_to_delta(u'60s')
583
>>> string_to_delta('60s')
1303
584
datetime.timedelta(0, 60)
1304
>>> string_to_delta(u'60m')
585
>>> string_to_delta('60m')
1305
586
datetime.timedelta(0, 3600)
1306
>>> string_to_delta(u'24h')
587
>>> string_to_delta('24h')
1307
588
datetime.timedelta(1)
1308
589
>>> string_to_delta(u'1w')
1309
590
datetime.timedelta(7)
1310
>>> string_to_delta(u'5m 30s')
591
>>> string_to_delta('5m 30s')
1311
592
datetime.timedelta(0, 330)
1312
593
"""
1313
594
timevalue = datetime.timedelta(0)
1333
614
return timevalue
1334
615
1335
616
617
def server_state_changed(state):
618
"""Derived from the Avahi example code"""
619
if state == avahi.SERVER_COLLISION:
620
logger.error(u"Zeroconf server name collision")
621
service.remove()
622
elif state == avahi.SERVER_RUNNING:
623
service.add()
624
625
626
def entry_group_state_changed(state, error):
627
"""Derived from the Avahi example code"""
628
logger.debug(u"Avahi state change: %i", state)
629
630
if state == avahi.ENTRY_GROUP_ESTABLISHED:
631
logger.debug(u"Zeroconf service established.")
632
elif state == avahi.ENTRY_GROUP_COLLISION:
633
logger.warning(u"Zeroconf service name collision.")
634
service.rename()
635
elif state == avahi.ENTRY_GROUP_FAILURE:
636
logger.critical(u"Avahi: Error in group state changed %s",
637
unicode(error))
638
raise AvahiGroupError("State changed: %s", str(error))
639
1336
640
def if_nametoindex(interface):
1337
"""Call the C function if_nametoindex(), or equivalent
1338
1339
Note: This function cannot accept a unicode string."""
641
"""Call the C function if_nametoindex(), or equivalent"""
1340
642
global if_nametoindex
1341
643
try:
1342
if_nametoindex = (ctypes.cdll.LoadLibrary
1343
(ctypes.util.find_library(u"c"))
1344
.if_nametoindex)
644
if_nametoindex = ctypes.cdll.LoadLibrary\
645
(ctypes.util.find_library("c")).if_nametoindex
1345
646
except (OSError, AttributeError):
1346
logger.warning(u"Doing if_nametoindex the hard way")
647
if "struct" not in sys.modules:
648
import struct
649
if "fcntl" not in sys.modules:
650
import fcntl
1347
651
def if_nametoindex(interface):
1348
652
"Get an interface index the hard way, i.e. using fcntl()"
1349
653
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1350
with closing(socket.socket()) as s:
1351
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1352
struct.pack(str(u"16s16x"),
1353
interface))
1354
interface_index = struct.unpack(str(u"I"),
1355
ifreq[16:20])[0]
654
s = socket.socket()
655
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
656
struct.pack("16s16x", interface))
657
s.close()
658
interface_index = struct.unpack("I", ifreq[16:20])[0]
1356
659
return interface_index
1357
660
return if_nametoindex(interface)
1358
661
1359
662
1360
663
def daemon(nochdir = False, noclose = False):
1361
664
"""See daemon(3). Standard BSD Unix function.
1362
1363
665
This should really exist as os.daemon, but it doesn't (yet)."""
1364
666
if os.fork():
1365
667
sys.exit()
1366
668
os.setsid()
1367
669
if not nochdir:
1368
os.chdir(u"/")
670
os.chdir("/")
1369
671
if os.fork():
1370
672
sys.exit()
1371
673
if not noclose:
1373
675
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1374
676
if not stat.S_ISCHR(os.fstat(null).st_mode):
1375
677
raise OSError(errno.ENODEV,
1376
u"/dev/null not a character device")
678
"/dev/null not a character device")
1377
679
os.dup2(null, sys.stdin.fileno())
1378
680
os.dup2(null, sys.stdout.fileno())
1379
681
os.dup2(null, sys.stderr.fileno())
1382
684
1383
685
1384
686
def main():
1385
1386
##################################################################
1387
# Parsing of options, both command line and config file
1388
1389
parser = optparse.OptionParser(version = "%%prog %s" % version)
1390
parser.add_option("-i", u"--interface", type=u"string",
1391
metavar="IF", help=u"Bind to interface IF")
1392
parser.add_option("-a", u"--address", type=u"string",
1393
help=u"Address to listen for requests on")
1394
parser.add_option("-p", u"--port", type=u"int",
1395
help=u"Port number to receive requests on")
1396
parser.add_option("--check", action=u"store_true",
1397
help=u"Run self-test")
1398
parser.add_option("--debug", action=u"store_true",
1399
help=u"Debug mode; run in foreground and log to"
1400
u" terminal")
1401
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1402
u" priority string (see GnuTLS documentation)")
1403
parser.add_option("--servicename", type=u"string",
1404
metavar=u"NAME", help=u"Zeroconf service name")
1405
parser.add_option("--configdir", type=u"string",
1406
default=u"/etc/mandos", metavar=u"DIR",
1407
help=u"Directory to search for configuration"
1408
u" files")
1409
parser.add_option("--no-dbus", action=u"store_false",
1410
dest=u"use_dbus", help=u"Do not provide D-Bus"
1411
u" system bus interface")
1412
parser.add_option("--no-ipv6", action=u"store_false",
1413
dest=u"use_ipv6", help=u"Do not use IPv6")
687
parser = OptionParser(version = "%%prog %s" % version)
688
parser.add_option("-i", "--interface", type="string",
689
metavar="IF", help="Bind to interface IF")
690
parser.add_option("-a", "--address", type="string",
691
help="Address to listen for requests on")
692
parser.add_option("-p", "--port", type="int",
693
help="Port number to receive requests on")
694
parser.add_option("--check", action="store_true", default=False,
695
help="Run self-test")
696
parser.add_option("--debug", action="store_true",
697
help="Debug mode; run in foreground and log to"
698
" terminal")
699
parser.add_option("--priority", type="string", help="GnuTLS"
700
" priority string (see GnuTLS documentation)")
701
parser.add_option("--servicename", type="string", metavar="NAME",
702
help="Zeroconf service name")
703
parser.add_option("--configdir", type="string",
704
default="/etc/mandos", metavar="DIR",
705
help="Directory to search for configuration"
706
" files")
1414
707
options = parser.parse_args()[0]
1415
708
1416
709
if options.check:
1419
712
sys.exit()
1420
713
1421
714
# Default values for config file for server-global settings
1422
server_defaults = { u"interface": u"",
1423
u"address": u"",
1424
u"port": u"",
1425
u"debug": u"False",
1426
u"priority":
1427
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1428
u"servicename": u"Mandos",
1429
u"use_dbus": u"True",
1430
u"use_ipv6": u"True",
715
server_defaults = { "interface": "",
716
"address": "",
717
"port": "",
718
"debug": "False",
719
"priority":
720
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
721
"servicename": "Mandos",
1431
722
}
1432
723
1433
724
# Parse config file for server-global settings
1434
server_config = configparser.SafeConfigParser(server_defaults)
725
server_config = ConfigParser.SafeConfigParser(server_defaults)
1435
726
del server_defaults
1436
server_config.read(os.path.join(options.configdir,
1437
u"mandos.conf"))
727
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1438
728
# Convert the SafeConfigParser object to a dict
1439
729
server_settings = server_config.defaults()
1440
# Use the appropriate methods on the non-string config options
1441
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1442
server_settings[option] = server_config.getboolean(u"DEFAULT",
1443
option)
1444
if server_settings["port"]:
1445
server_settings["port"] = server_config.getint(u"DEFAULT",
1446
u"port")
730
# Use getboolean on the boolean config option
731
server_settings["debug"] = server_config.getboolean\
732
("DEFAULT", "debug")
1447
733
del server_config
1448
734
1449
735
# Override the settings from the config file with command line
1450
736
# options, if set.
1451
for option in (u"interface", u"address", u"port", u"debug",
1452
u"priority", u"servicename", u"configdir",
1453
u"use_dbus", u"use_ipv6"):
737
for option in ("interface", "address", "port", "debug",
738
"priority", "servicename", "configdir"):
1454
739
value = getattr(options, option)
1455
740
if value is not None:
1456
741
server_settings[option] = value
1457
742
del options
1458
# Force all strings to be unicode
1459
for option in server_settings.keys():
1460
if type(server_settings[option]) is str:
1461
server_settings[option] = unicode(server_settings[option])
1462
743
# Now we have our good server settings in "server_settings"
1463
744
1464
##################################################################
1465
1466
# For convenience
1467
debug = server_settings[u"debug"]
1468
use_dbus = server_settings[u"use_dbus"]
1469
use_ipv6 = server_settings[u"use_ipv6"]
745
debug = server_settings["debug"]
1470
746
1471
747
if not debug:
1472
748
syslogger.setLevel(logging.WARNING)
1473
749
console.setLevel(logging.WARNING)
1474
750
1475
if server_settings[u"servicename"] != u"Mandos":
1476
syslogger.setFormatter(logging.Formatter
1477
(u'Mandos (%s) [%%(process)d]:'
1478
u' %%(levelname)s: %%(message)s'
1479
% server_settings[u"servicename"]))
751
if server_settings["servicename"] != "Mandos":
752
syslogger.setFormatter(logging.Formatter\
753
('Mandos (%s): %%(levelname)s:'
754
' %%(message)s'
755
% server_settings["servicename"]))
1480
756
1481
757
# Parse config file with clients
1482
client_defaults = { u"timeout": u"1h",
1483
u"interval": u"5m",
1484
u"checker": u"fping -q -- %%(host)s",
1485
u"host": u"",
758
client_defaults = { "timeout": "1h",
759
"interval": "5m",
760
"checker": "fping -q -- %(host)s",
761
"host": "",
1486
762
}
1487
client_config = configparser.SafeConfigParser(client_defaults)
1488
client_config.read(os.path.join(server_settings[u"configdir"],
1489
u"clients.conf"))
1490
1491
global mandos_dbus_service
1492
mandos_dbus_service = None
1493
1494
tcp_server = MandosServer((server_settings[u"address"],
1495
server_settings[u"port"]),
1496
ClientHandler,
1497
interface=server_settings[u"interface"],
1498
use_ipv6=use_ipv6,
1499
gnutls_priority=
1500
server_settings[u"priority"],
1501
use_dbus=use_dbus)
1502
pidfilename = u"/var/run/mandos.pid"
1503
try:
1504
pidfile = open(pidfilename, u"w")
1505
except IOError:
1506
logger.error(u"Could not open file %r", pidfilename)
1507
1508
try:
1509
uid = pwd.getpwnam(u"_mandos").pw_uid
1510
gid = pwd.getpwnam(u"_mandos").pw_gid
1511
except KeyError:
1512
try:
1513
uid = pwd.getpwnam(u"mandos").pw_uid
1514
gid = pwd.getpwnam(u"mandos").pw_gid
1515
except KeyError:
1516
try:
1517
uid = pwd.getpwnam(u"nobody").pw_uid
1518
gid = pwd.getpwnam(u"nobody").pw_gid
1519
except KeyError:
1520
uid = 65534
1521
gid = 65534
1522
try:
763
client_config = ConfigParser.SafeConfigParser(client_defaults)
764
client_config.read(os.path.join(server_settings["configdir"],
765
"clients.conf"))
766
767
clients = Set()
768
tcp_server = IPv6_TCPServer((server_settings["address"],
769
server_settings["port"]),
770
TCP_handler,
771
settings=server_settings,
772
clients=clients)
773
pidfilename = "/var/run/mandos.pid"
774
try:
775
pidfile = open(pidfilename, "w")
776
except IOError, error:
777
logger.error("Could not open file %r", pidfilename)
778
779
uid = 65534
780
gid = 65534
781
try:
782
uid = pwd.getpwnam("mandos").pw_uid
783
except KeyError:
784
try:
785
uid = pwd.getpwnam("nobody").pw_uid
786
except KeyError:
787
pass
788
try:
789
gid = pwd.getpwnam("mandos").pw_gid
790
except KeyError:
791
try:
792
gid = pwd.getpwnam("nogroup").pw_gid
793
except KeyError:
794
pass
795
try:
796
os.setuid(uid)
1523
797
os.setgid(gid)
1524
os.setuid(uid)
1525
798
except OSError, error:
1526
799
if error[0] != errno.EPERM:
1527
800
raise error
1528
801
1529
# Enable all possible GnuTLS debugging
1530
if debug:
1531
# "Use a log level over 10 to enable all debugging options."
1532
# - GnuTLS manual
1533
gnutls.library.functions.gnutls_global_set_log_level(11)
1534
1535
@gnutls.library.types.gnutls_log_func
1536
def debug_gnutls(level, string):
1537
logger.debug(u"GnuTLS: %s", string[:-1])
1538
1539
(gnutls.library.functions
1540
.gnutls_global_set_log_function(debug_gnutls))
802
global service
803
service = AvahiService(name = server_settings["servicename"],
804
servicetype = "_mandos._tcp", )
805
if server_settings["interface"]:
806
service.interface = if_nametoindex\
807
(server_settings["interface"])
1541
808
1542
809
global main_loop
810
global bus
811
global server
1543
812
# From the Avahi example code
1544
813
DBusGMainLoop(set_as_default=True )
1545
814
main_loop = gobject.MainLoop()
1546
815
bus = dbus.SystemBus()
816
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
817
avahi.DBUS_PATH_SERVER),
818
avahi.DBUS_INTERFACE_SERVER)
1547
819
# End of Avahi example code
1548
if use_dbus:
1549
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1550
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1551
service = AvahiService(name = server_settings[u"servicename"],
1552
servicetype = u"_mandos._tcp",
1553
protocol = protocol, bus = bus)
1554
if server_settings["interface"]:
1555
service.interface = (if_nametoindex
1556
(str(server_settings[u"interface"])))
1557
1558
client_class = Client
1559
if use_dbus:
1560
client_class = functools.partial(ClientDBus, bus = bus)
1561
tcp_server.clients.update(set(
1562
client_class(name = section,
1563
config= dict(client_config.items(section)))
1564
for section in client_config.sections()))
1565
if not tcp_server.clients:
1566
logger.warning(u"No clients defined")
820
821
def remove_from_clients(client):
822
clients.remove(client)
823
if not clients:
824
logger.critical(u"No clients left, exiting")
825
sys.exit()
826
827
clients.update(Set(Client(name = section,
828
stop_hook = remove_from_clients,
829
config
830
= dict(client_config.items(section)))
831
for section in client_config.sections()))
832
if not clients:
833
logger.critical(u"No clients defined")
834
sys.exit(1)
1567
835
1568
836
if debug:
1569
837
# Redirect stdin so all checkers get /dev/null
1578
846
daemon()
1579
847
1580
848
try:
1581
with closing(pidfile):
1582
pid = os.getpid()
1583
pidfile.write(str(pid) + "\n")
849
pid = os.getpid()
850
pidfile.write(str(pid) + "\n")
851
pidfile.close()
1584
852
del pidfile
1585
853
except IOError:
1586
854
logger.error(u"Could not write to file %r with PID %d",
1592
860
1593
861
def cleanup():
1594
862
"Cleanup function; run on exit"
1595
service.cleanup()
863
global group
864
# From the Avahi example code
865
if not group is None:
866
group.Free()
867
group = None
868
# End of Avahi example code
1596
869
1597
while tcp_server.clients:
1598
client = tcp_server.clients.pop()
1599
client.disable_hook = None
1600
client.disable()
870
while clients:
871
client = clients.pop()
872
client.stop_hook = None
873
client.stop()
1601
874
1602
875
atexit.register(cleanup)
1603
876
1606
879
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1607
880
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1608
881
1609
if use_dbus:
1610
class MandosDBusService(dbus.service.Object):
1611
"""A D-Bus proxy object"""
1612
def __init__(self):
1613
dbus.service.Object.__init__(self, bus, u"/")
1614
_interface = u"se.bsnet.fukt.Mandos"
1615
1616
@dbus.service.signal(_interface, signature=u"oa{sv}")
1617
def ClientAdded(self, objpath, properties):
1618
"D-Bus signal"
1619
pass
1620
1621
@dbus.service.signal(_interface, signature=u"s")
1622
def ClientNotFound(self, fingerprint):
1623
"D-Bus signal"
1624
pass
1625
1626
@dbus.service.signal(_interface, signature=u"os")
1627
def ClientRemoved(self, objpath, name):
1628
"D-Bus signal"
1629
pass
1630
1631
@dbus.service.method(_interface, out_signature=u"ao")
1632
def GetAllClients(self):
1633
"D-Bus method"
1634
return dbus.Array(c.dbus_object_path
1635
for c in tcp_server.clients)
1636
1637
@dbus.service.method(_interface,
1638
out_signature=u"a{oa{sv}}")
1639
def GetAllClientsWithProperties(self):
1640
"D-Bus method"
1641
return dbus.Dictionary(
1642
((c.dbus_object_path, c.GetAll(u""))
1643
for c in tcp_server.clients),
1644
signature=u"oa{sv}")
1645
1646
@dbus.service.method(_interface, in_signature=u"o")
1647
def RemoveClient(self, object_path):
1648
"D-Bus method"
1649
for c in tcp_server.clients:
1650
if c.dbus_object_path == object_path:
1651
tcp_server.clients.remove(c)
1652
c.remove_from_connection()
1653
# Don't signal anything except ClientRemoved
1654
c.disable(signal=False)
1655
# Emit D-Bus signal
1656
self.ClientRemoved(object_path, c.name)
1657
return
1658
raise KeyError
1659
1660
del _interface
1661
1662
mandos_dbus_service = MandosDBusService()
1663
1664
for client in tcp_server.clients:
1665
if use_dbus:
1666
# Emit D-Bus signal
1667
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1668
client.GetAll(u""))
1669
client.enable()
882
for client in clients:
883
client.start()
1670
884
1671
885
tcp_server.enable()
1672
886
tcp_server.server_activate()
1673
887
1674
888
# Find out what port we got
1675
889
service.port = tcp_server.socket.getsockname()[1]
1676
if use_ipv6:
1677
logger.info(u"Now listening on address %r, port %d,"
1678
" flowinfo %d, scope_id %d"
1679
% tcp_server.socket.getsockname())
1680
else: # IPv4
1681
logger.info(u"Now listening on address %r, port %d"
1682
% tcp_server.socket.getsockname())
890
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
891
u" scope_id %d" % tcp_server.socket.getsockname())
1683
892
1684
893
#service.interface = tcp_server.socket.getsockname()[3]
1685
894
1686
895
try:
1687
896
# From the Avahi example code
897
server.connect_to_signal("StateChanged", server_state_changed)
1688
898
try:
1689
service.activate()
899
server_state_changed(server.GetState())
1690
900
except dbus.exceptions.DBusException, error:
1691
901
logger.critical(u"DBusException: %s", error)
1692
902
sys.exit(1)
1694
904
1695
905
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1696
906
lambda *args, **kwargs:
1697
(tcp_server.handle_request
1698
(*args[2:], **kwargs) or True))
907
tcp_server.handle_request\
908
(*args[2:], **kwargs) or True)
1699
909
1700
910
logger.debug(u"Starting main loop")
1701
911
main_loop.run()
1702
912
except AvahiError, error:
1703
logger.critical(u"AvahiError: %s", error)
913
logger.critical(u"AvahiError: %s" + unicode(error))
1704
914
sys.exit(1)
1705
915
except KeyboardInterrupt:
1706
916
if debug:
1707
print >> sys.stderr
1708
logger.debug(u"Server received KeyboardInterrupt")
1709
logger.debug(u"Server exiting")
917
print
1710
918
1711
919
if __name__ == '__main__':
1712
920
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0