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- Committer: Teddy Hogeborn
- Date: 2008-07-22 06:23:29 UTC
- Revision ID: teddy@fukt.bsnet.se-20080722062329-jaex5y5mslf6sqjx
* mandos-clients.conf ([DEFAULT]): New section.
* plugins.d/mandosclient.c (start_mandos_communication): Only print if
debugging.
Print server
name.
Bug fix: Loop
until suc-
cess.
* server.py (serverName): Set via option, not globally.
(Client.__init__): Removed argument "options". Require "timeout"
and "interval" arguments.
(tcp_handler.handle): Set "priority" from self.server.options.
(main): Removed "--timeout" and "--interval" options. New options
"--priority" and "--servicename". Add defaults for
"timeout" and "interval". Set "serviceName" from options.
Do not pass "options" to "Client()".
* plugins.d/mandosclient.c (start_mandos_communication): Only print if
debugging.
Print server
name.
Bug fix: Loop
until suc-
cess.
* server.py (serverName): Set via option, not globally.
(Client.__init__): Removed argument "options". Require "timeout"
and "interval" arguments.
(tcp_handler.handle): Set "priority" from self.server.options.
(main): Removed "--timeout" and "--interval" options. New options
"--priority" and "--servicename". Add defaults for
"timeout" and "interval". Set "serviceName" from options.
Do not pass "options" to "Client()".
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
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
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# 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
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
31
#
32
33
from __future__ import division
34
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
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
58
63
59
import dbus
64
import dbus.service
65
60
import gobject
66
61
import avahi
67
62
from dbus.mainloop.glib import DBusGMainLoop
68
63
import ctypes
69
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 = "1.0.14"
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'))
64
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
75
76
77
logger = logging.Logger('mandos')
78
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
91
82
logger.addHandler(syslogger)
92
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
98
99
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
101
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
105
106
class AvahiServiceError(AvahiError):
107
pass
108
109
class AvahiGroupError(AvahiError):
110
pass
111
112
113
class AvahiService(object):
114
"""An Avahi (Zeroconf) service.
115
116
Attributes:
117
interface: integer; avahi.IF_UNSPEC or an interface index.
118
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
121
See <http://www.dns-sd.org/ServiceTypes.html>
122
port: integer; what port to announce
123
TXT: list of strings; TXT record for the service
124
domain: string; Domain to publish on, default to .local if empty.
125
host: string; Host to publish records for, default is localhost
126
max_renames: integer; maximum number of renames
127
rename_count: integer; counter so we only rename after collisions
128
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
"""
133
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):
137
self.interface = interface
138
self.name = name
139
self.type = servicetype
140
self.port = port
141
self.TXT = TXT if TXT is not None else []
142
self.domain = domain
143
self.host = host
144
self.rename_count = 0
145
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
def rename(self):
151
"""Derived from the Avahi example code"""
152
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
155
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
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))
164
self.remove()
165
self.add()
166
self.rename_count += 1
167
def remove(self):
168
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
171
def add(self):
172
"""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)
181
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())
83
del syslogger
84
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
89
# From the Avahi example code:
90
serviceName = None
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
99
# End of Avahi example code
228
100
229
101
230
102
class Client(object):
231
103
"""A representation of a client host served by this server.
232
233
104
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
105
name: string; from the config file, used in log messages
236
106
fingerprint: string (40 or 32 hexadecimal digits); used to
237
107
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.
108
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
114
interval: datetime.timedelta(); How often to start a new checker
115
stop_hook: If set, called by stop() as stop_hook(self)
116
checker: subprocess.Popen(); a running checker process used
117
to see if the client lives.
118
Is None if no process is running.
251
119
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
120
stop_initiator_tag: - '' -
253
121
checker_callback_tag: - '' -
254
122
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
256
124
runtime with vars(self) as dict, so that for
257
125
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
126
Private attibutes:
127
_timeout: Real variable for 'timeout'
128
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
130
_interval_milliseconds: - '' -
259
131
"""
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):
277
"""Note: the 'checker' key in 'config' sets the
278
'checker_command' attribute and *not* the 'checker'
279
attribute."""
132
def _set_timeout(self, timeout):
133
"Setter function for 'timeout' attribute"
134
self._timeout = timeout
135
self._timeout_milliseconds = ((self.timeout.days
136
* 24 * 60 * 60 * 1000)
137
+ (self.timeout.seconds * 1000)
138
+ (self.timeout.microseconds
139
// 1000))
140
timeout = property(lambda self: self._timeout,
141
_set_timeout)
142
del _set_timeout
143
def _set_interval(self, interval):
144
"Setter function for 'interval' attribute"
145
self._interval = interval
146
self._interval_milliseconds = ((self.interval.days
147
* 24 * 60 * 60 * 1000)
148
+ (self.interval.seconds
149
* 1000)
150
+ (self.interval.microseconds
151
// 1000))
152
interval = property(lambda self: self._interval,
153
_set_interval)
154
del _set_interval
155
def __init__(self, name=None, stop_hook=None, fingerprint=None,
156
secret=None, secfile=None, fqdn=None, timeout=None,
157
interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
280
160
self.name = name
281
if config is None:
282
config = {}
283
161
logger.debug(u"Creating client %r", self.name)
284
# Uppercase and remove spaces from fingerprint for later
285
# comparison purposes with return value from the fingerprint()
286
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
162
# Uppercase and remove spaces from fingerprint
163
# for later comparison purposes with return value of
164
# the fingerprint() function
165
self.fingerprint = fingerprint.upper().replace(u" ", u"")
289
166
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()
167
if secret:
168
self.secret = secret.decode(u"base64")
169
elif secfile:
170
sf = open(secfile)
171
self.secret = sf.read()
172
sf.close()
298
173
else:
299
raise TypeError(u"No secret or secfile for client %s"
300
% 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
305
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
174
raise RuntimeError(u"No secret or secfile for client %s"
175
% self.name)
176
self.fqdn = fqdn # string
177
self.created = datetime.datetime.now()
178
self.last_seen = None
179
self.timeout = string_to_delta(timeout)
180
self.interval = string_to_delta(interval)
181
self.stop_hook = stop_hook
309
182
self.checker = None
310
183
self.checker_initiator_tag = None
311
self.disable_initiator_tag = None
184
self.stop_initiator_tag = None
312
185
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):
186
self.check_command = checker
187
def start(self):
318
188
"""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
189
# Schedule a new checker to be started an 'interval' from now,
324
190
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
328
# Schedule a disable() when 'timeout' has passed
329
self.disable_initiator_tag = (gobject.timeout_add
330
(self.timeout_milliseconds(),
331
self.disable))
332
self.enabled = True
191
self.checker_initiator_tag = gobject.timeout_add\
192
(self._interval_milliseconds,
193
self.start_checker)
333
194
# Also start a new checker *right now*.
334
195
self.start_checker()
335
336
def disable(self, quiet=True):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
196
# Schedule a stop() when 'timeout' has passed
197
self.stop_initiator_tag = gobject.timeout_add\
198
(self._timeout_milliseconds,
199
self.stop)
200
def stop(self):
201
"""Stop this client.
202
The possibility that this client might be restarted is left
203
open, but not currently used."""
204
# If this client doesn't have a secret, it is already stopped.
205
if self.secret:
206
logger.debug(u"Stopping client %s", self.name)
207
self.secret = None
208
else:
339
209
return False
340
if not quiet:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = None
345
if getattr(self, u"checker_initiator_tag", False):
210
if hasattr(self, "stop_initiator_tag") \
211
and self.stop_initiator_tag:
212
gobject.source_remove(self.stop_initiator_tag)
213
self.stop_initiator_tag = None
214
if hasattr(self, "checker_initiator_tag") \
215
and self.checker_initiator_tag:
346
216
gobject.source_remove(self.checker_initiator_tag)
347
217
self.checker_initiator_tag = None
348
218
self.stop_checker()
349
if self.disable_hook:
350
self.disable_hook(self)
351
self.enabled = False
219
if self.stop_hook:
220
self.stop_hook(self)
352
221
# Do not run this again if called by a gobject.timeout_add
353
222
return False
354
355
223
def __del__(self):
356
self.disable_hook = None
357
self.disable()
358
359
def checker_callback(self, pid, condition, command):
224
self.stop_hook = None
225
self.stop()
226
def checker_callback(self, pid, condition):
360
227
"""The checker has completed, so take appropriate actions."""
228
now = datetime.datetime.now()
361
229
self.checker_callback_tag = None
362
230
self.checker = None
363
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
367
vars(self))
368
self.checked_ok()
369
else:
370
logger.info(u"Checker for %(name)s failed",
371
vars(self))
372
else:
231
if os.WIFEXITED(condition) \
232
and (os.WEXITSTATUS(condition) == 0):
233
logger.debug(u"Checker for %(name)s succeeded",
234
vars(self))
235
self.last_seen = now
236
gobject.source_remove(self.stop_initiator_tag)
237
self.stop_initiator_tag = gobject.timeout_add\
238
(self._timeout_milliseconds,
239
self.stop)
240
elif not os.WIFEXITED(condition):
373
241
logger.warning(u"Checker for %(name)s crashed?",
374
242
vars(self))
375
376
def checked_ok(self):
377
"""Bump up the timeout for this client.
378
379
This should only be called when the client has been seen,
380
alive and well.
381
"""
382
self.last_checked_ok = datetime.datetime.utcnow()
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = (gobject.timeout_add
385
(self.timeout_milliseconds(),
386
self.disable))
387
243
else:
244
logger.debug(u"Checker for %(name)s failed",
245
vars(self))
388
246
def start_checker(self):
389
247
"""Start a new checker subprocess if one is not running.
390
391
248
If a checker already exists, leave it running and do
392
249
nothing."""
393
250
# The reason for not killing a running checker is that if we
398
255
# checkers alone, the checker would have to take more time
399
256
# than 'timeout' for the client to be declared invalid, which
400
257
# is as it should be.
401
402
# If a checker exists, make sure it is not a zombie
403
try:
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
408
raise error
409
else:
410
if pid:
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
415
# Start a new checker if needed
416
258
if self.checker is None:
417
259
try:
418
# In case checker_command has exactly one % operator
419
command = self.checker_command % self.host
260
command = self.check_command % self.fqdn
420
261
except TypeError:
421
# Escape attributes for the shell
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
262
escaped_attrs = dict((key, re.escape(str(val)))
426
263
for key, val in
427
264
vars(self).iteritems())
428
265
try:
429
command = self.checker_command % escaped_attrs
266
command = self.check_command % escaped_attrs
430
267
except TypeError, error:
431
logger.error(u'Could not format string "%s":'
432
u' %s', self.checker_command, error)
268
logger.critical(u'Could not format string "%s":'
269
u' %s', self.check_command, error)
433
270
return True # Try again later
434
self.current_checker_command = command
435
271
try:
436
logger.info(u"Starting checker %r for %s",
437
command, self.name)
438
# We don't need to redirect stdout and stderr, since
439
# in normal mode, that is already done by daemon(),
440
# and in debug mode we don't want to. (Stdin is
441
# always replaced by /dev/null.)
442
self.checker = subprocess.Popen(command,
443
close_fds=True,
444
shell=True, cwd=u"/")
445
self.checker_callback_tag = (gobject.child_watch_add
446
(self.checker.pid,
447
self.checker_callback,
448
data=command))
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
452
if pid:
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
455
except OSError, error:
272
logger.debug(u"Starting checker %r for %s",
273
command, self.name)
274
self.checker = subprocess.\
275
Popen(command,
276
close_fds=True, shell=True,
277
cwd="/")
278
self.checker_callback_tag = gobject.child_watch_add\
279
(self.checker.pid,
280
self.checker_callback)
281
except subprocess.OSError, error:
456
282
logger.error(u"Failed to start subprocess: %s",
457
283
error)
458
284
# Re-run this periodically if run by gobject.timeout_add
459
285
return True
460
461
286
def stop_checker(self):
462
287
"""Force the checker process, if any, to stop."""
463
288
if self.checker_callback_tag:
464
289
gobject.source_remove(self.checker_callback_tag)
465
290
self.checker_callback_tag = None
466
if getattr(self, u"checker", None) is None:
291
if not hasattr(self, "checker") or self.checker is None:
467
292
return
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
293
logger.debug("Stopping checker for %(name)s", vars(self))
469
294
try:
470
295
os.kill(self.checker.pid, signal.SIGTERM)
471
#time.sleep(0.5)
296
#os.sleep(0.5)
472
297
#if self.checker.poll() is None:
473
298
# os.kill(self.checker.pid, signal.SIGKILL)
474
299
except OSError, error:
475
if error.errno != errno.ESRCH: # No such process
300
if error.errno != errno.ESRCH:
476
301
raise
477
302
self.checker = None
478
479
def still_valid(self):
303
def still_valid(self, now=None):
480
304
"""Has the timeout not yet passed for this client?"""
481
if not getattr(self, u"enabled", False):
482
return False
483
now = datetime.datetime.utcnow()
484
if self.last_checked_ok is None:
305
if now is None:
306
now = datetime.datetime.now()
307
if self.last_seen is None:
485
308
return now < (self.created + self.timeout)
486
309
else:
487
return now < (self.last_checked_ok + self.timeout)
488
489
490
def dbus_service_property(dbus_interface, signature=u"v",
491
access=u"readwrite", byte_arrays=False):
492
"""Decorators for marking methods of a DBusObjectWithProperties to
493
become properties on the D-Bus.
494
495
The decorated method will be called with no arguments by "Get"
496
and with one argument by "Set".
497
498
The parameters, where they are supported, are the same as
499
dbus.service.method, except there is only "signature", since the
500
type from Get() and the type sent to Set() is the same.
501
"""
502
def decorator(func):
503
func._dbus_is_property = True
504
func._dbus_interface = dbus_interface
505
func._dbus_signature = signature
506
func._dbus_access = access
507
func._dbus_name = func.__name__
508
if func._dbus_name.endswith(u"_dbus_property"):
509
func._dbus_name = func._dbus_name[:-14]
510
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
511
return func
512
return decorator
513
514
515
class DBusPropertyException(dbus.exceptions.DBusException):
516
"""A base class for D-Bus property-related exceptions
517
"""
518
def __unicode__(self):
519
return unicode(str(self))
520
521
522
class DBusPropertyAccessException(DBusPropertyException):
523
"""A property's access permissions disallows an operation.
524
"""
525
pass
526
527
528
class DBusPropertyNotFound(DBusPropertyException):
529
"""An attempt was made to access a non-existing property.
530
"""
531
pass
532
533
534
class DBusObjectWithProperties(dbus.service.Object):
535
"""A D-Bus object with properties.
536
537
Classes inheriting from this can use the dbus_service_property
538
decorator to expose methods as D-Bus properties. It exposes the
539
standard Get(), Set(), and GetAll() methods on the D-Bus.
540
"""
541
542
@staticmethod
543
def _is_dbus_property(obj):
544
return getattr(obj, u"_dbus_is_property", False)
545
546
def _get_all_dbus_properties(self):
547
"""Returns a generator of (name, attribute) pairs
548
"""
549
return ((prop._dbus_name, prop)
550
for name, prop in
551
inspect.getmembers(self, self._is_dbus_property))
552
553
def _get_dbus_property(self, interface_name, property_name):
554
"""Returns a bound method if one exists which is a D-Bus
555
property with the specified name and interface.
556
"""
557
for name in (property_name,
558
property_name + u"_dbus_property"):
559
prop = getattr(self, name, None)
560
if (prop is None
561
or not self._is_dbus_property(prop)
562
or prop._dbus_name != property_name
563
or (interface_name and prop._dbus_interface
564
and interface_name != prop._dbus_interface)):
565
continue
566
return prop
567
# No such property
568
raise DBusPropertyNotFound(self.dbus_object_path + u":"
569
+ interface_name + u"."
570
+ property_name)
571
572
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
573
out_signature=u"v")
574
def Get(self, interface_name, property_name):
575
"""Standard D-Bus property Get() method, see D-Bus standard.
576
"""
577
prop = self._get_dbus_property(interface_name, property_name)
578
if prop._dbus_access == u"write":
579
raise DBusPropertyAccessException(property_name)
580
value = prop()
581
if not hasattr(value, u"variant_level"):
582
return value
583
return type(value)(value, variant_level=value.variant_level+1)
584
585
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
586
def Set(self, interface_name, property_name, value):
587
"""Standard D-Bus property Set() method, see D-Bus standard.
588
"""
589
prop = self._get_dbus_property(interface_name, property_name)
590
if prop._dbus_access == u"read":
591
raise DBusPropertyAccessException(property_name)
592
if prop._dbus_get_args_options[u"byte_arrays"]:
593
value = dbus.ByteArray(''.join(unichr(byte)
594
for byte in value))
595
prop(value)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
598
out_signature=u"a{sv}")
599
def GetAll(self, interface_name):
600
"""Standard D-Bus property GetAll() method, see D-Bus
601
standard.
602
603
Note: Will not include properties with access="write".
604
"""
605
all = {}
606
for name, prop in self._get_all_dbus_properties():
607
if (interface_name
608
and interface_name != prop._dbus_interface):
609
# Interface non-empty but did not match
610
continue
611
# Ignore write-only properties
612
if prop._dbus_access == u"write":
613
continue
614
value = prop()
615
if not hasattr(value, u"variant_level"):
616
all[name] = value
617
continue
618
all[name] = type(value)(value, variant_level=
619
value.variant_level+1)
620
return dbus.Dictionary(all, signature=u"sv")
621
622
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
623
out_signature=u"s",
624
path_keyword='object_path',
625
connection_keyword='connection')
626
def Introspect(self, object_path, connection):
627
"""Standard D-Bus method, overloaded to insert property tags.
628
"""
629
xmlstring = dbus.service.Object.Introspect(self, object_path,
630
connection)
631
try:
632
document = xml.dom.minidom.parseString(xmlstring)
633
def make_tag(document, name, prop):
634
e = document.createElement(u"property")
635
e.setAttribute(u"name", name)
636
e.setAttribute(u"type", prop._dbus_signature)
637
e.setAttribute(u"access", prop._dbus_access)
638
return e
639
for if_tag in document.getElementsByTagName(u"interface"):
640
for tag in (make_tag(document, name, prop)
641
for name, prop
642
in self._get_all_dbus_properties()
643
if prop._dbus_interface
644
== if_tag.getAttribute(u"name")):
645
if_tag.appendChild(tag)
646
# Add the names to the return values for the
647
# "org.freedesktop.DBus.Properties" methods
648
if (if_tag.getAttribute(u"name")
649
== u"org.freedesktop.DBus.Properties"):
650
for cn in if_tag.getElementsByTagName(u"method"):
651
if cn.getAttribute(u"name") == u"Get":
652
for arg in cn.getElementsByTagName(u"arg"):
653
if (arg.getAttribute(u"direction")
654
== u"out"):
655
arg.setAttribute(u"name", u"value")
656
elif cn.getAttribute(u"name") == u"GetAll":
657
for arg in cn.getElementsByTagName(u"arg"):
658
if (arg.getAttribute(u"direction")
659
== u"out"):
660
arg.setAttribute(u"name", u"props")
661
xmlstring = document.toxml(u"utf-8")
662
document.unlink()
663
except (AttributeError, xml.dom.DOMException,
664
xml.parsers.expat.ExpatError), error:
665
logger.error(u"Failed to override Introspection method",
666
error)
667
return xmlstring
668
669
670
class ClientDBus(Client, DBusObjectWithProperties):
671
"""A Client class using D-Bus
672
673
Attributes:
674
dbus_object_path: dbus.ObjectPath
675
bus: dbus.SystemBus()
676
"""
677
# dbus.service.Object doesn't use super(), so we can't either.
678
679
def __init__(self, bus = None, *args, **kwargs):
680
self.bus = bus
681
Client.__init__(self, *args, **kwargs)
682
# Only now, when this client is initialized, can it show up on
683
# the D-Bus
684
self.dbus_object_path = (dbus.ObjectPath
685
(u"/clients/"
686
+ self.name.replace(u".", u"_")))
687
DBusObjectWithProperties.__init__(self, self.bus,
688
self.dbus_object_path)
689
690
@staticmethod
691
def _datetime_to_dbus(dt, variant_level=0):
692
"""Convert a UTC datetime.datetime() to a D-Bus type."""
693
return dbus.String(dt.isoformat(),
694
variant_level=variant_level)
695
696
def enable(self):
697
oldstate = getattr(self, u"enabled", False)
698
r = Client.enable(self)
699
if oldstate != self.enabled:
700
# Emit D-Bus signals
701
self.PropertyChanged(dbus.String(u"enabled"),
702
dbus.Boolean(True, variant_level=1))
703
self.PropertyChanged(
704
dbus.String(u"last_enabled"),
705
self._datetime_to_dbus(self.last_enabled,
706
variant_level=1))
707
return r
708
709
def disable(self, quiet = False):
710
oldstate = getattr(self, u"enabled", False)
711
r = Client.disable(self, quiet=quiet)
712
if not quiet and oldstate != self.enabled:
713
# Emit D-Bus signal
714
self.PropertyChanged(dbus.String(u"enabled"),
715
dbus.Boolean(False, variant_level=1))
716
return r
717
718
def __del__(self, *args, **kwargs):
719
try:
720
self.remove_from_connection()
721
except LookupError:
722
pass
723
if hasattr(DBusObjectWithProperties, u"__del__"):
724
DBusObjectWithProperties.__del__(self, *args, **kwargs)
725
Client.__del__(self, *args, **kwargs)
726
727
def checker_callback(self, pid, condition, command,
728
*args, **kwargs):
729
self.checker_callback_tag = None
730
self.checker = None
731
# Emit D-Bus signal
732
self.PropertyChanged(dbus.String(u"checker_running"),
733
dbus.Boolean(False, variant_level=1))
734
if os.WIFEXITED(condition):
735
exitstatus = os.WEXITSTATUS(condition)
736
# Emit D-Bus signal
737
self.CheckerCompleted(dbus.Int16(exitstatus),
738
dbus.Int64(condition),
739
dbus.String(command))
740
else:
741
# Emit D-Bus signal
742
self.CheckerCompleted(dbus.Int16(-1),
743
dbus.Int64(condition),
744
dbus.String(command))
745
746
return Client.checker_callback(self, pid, condition, command,
747
*args, **kwargs)
748
749
def checked_ok(self, *args, **kwargs):
750
r = Client.checked_ok(self, *args, **kwargs)
751
# Emit D-Bus signal
752
self.PropertyChanged(
753
dbus.String(u"last_checked_ok"),
754
(self._datetime_to_dbus(self.last_checked_ok,
755
variant_level=1)))
756
return r
757
758
def start_checker(self, *args, **kwargs):
759
old_checker = self.checker
760
if self.checker is not None:
761
old_checker_pid = self.checker.pid
762
else:
763
old_checker_pid = None
764
r = Client.start_checker(self, *args, **kwargs)
765
# Only if new checker process was started
766
if (self.checker is not None
767
and old_checker_pid != self.checker.pid):
768
# Emit D-Bus signal
769
self.CheckerStarted(self.current_checker_command)
770
self.PropertyChanged(
771
dbus.String(u"checker_running"),
772
dbus.Boolean(True, variant_level=1))
773
return r
774
775
def stop_checker(self, *args, **kwargs):
776
old_checker = getattr(self, u"checker", None)
777
r = Client.stop_checker(self, *args, **kwargs)
778
if (old_checker is not None
779
and getattr(self, u"checker", None) is None):
780
self.PropertyChanged(dbus.String(u"checker_running"),
781
dbus.Boolean(False, variant_level=1))
782
return r
783
784
## D-Bus methods & signals
785
_interface = u"se.bsnet.fukt.Mandos.Client"
786
787
# CheckedOK - method
788
@dbus.service.method(_interface)
789
def CheckedOK(self):
790
return self.checked_ok()
791
792
# CheckerCompleted - signal
793
@dbus.service.signal(_interface, signature=u"nxs")
794
def CheckerCompleted(self, exitcode, waitstatus, command):
795
"D-Bus signal"
796
pass
797
798
# CheckerStarted - signal
799
@dbus.service.signal(_interface, signature=u"s")
800
def CheckerStarted(self, command):
801
"D-Bus signal"
802
pass
803
804
# PropertyChanged - signal
805
@dbus.service.signal(_interface, signature=u"sv")
806
def PropertyChanged(self, property, value):
807
"D-Bus signal"
808
pass
809
810
# GotSecret - signal
811
@dbus.service.signal(_interface)
812
def GotSecret(self):
813
"D-Bus signal"
814
pass
815
816
# Rejected - signal
817
@dbus.service.signal(_interface)
818
def Rejected(self):
819
"D-Bus signal"
820
pass
821
822
# Enable - method
823
@dbus.service.method(_interface)
824
def Enable(self):
825
"D-Bus method"
826
self.enable()
827
828
# StartChecker - method
829
@dbus.service.method(_interface)
830
def StartChecker(self):
831
"D-Bus method"
832
self.start_checker()
833
834
# Disable - method
835
@dbus.service.method(_interface)
836
def Disable(self):
837
"D-Bus method"
838
self.disable()
839
840
# StopChecker - method
841
@dbus.service.method(_interface)
842
def StopChecker(self):
843
self.stop_checker()
844
845
# name - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def name_dbus_property(self):
848
return dbus.String(self.name)
849
850
# fingerprint - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def fingerprint_dbus_property(self):
853
return dbus.String(self.fingerprint)
854
855
# host - property
856
@dbus_service_property(_interface, signature=u"s",
857
access=u"readwrite")
858
def host_dbus_property(self, value=None):
859
if value is None: # get
860
return dbus.String(self.host)
861
self.host = value
862
# Emit D-Bus signal
863
self.PropertyChanged(dbus.String(u"host"),
864
dbus.String(value, variant_level=1))
865
866
# created - property
867
@dbus_service_property(_interface, signature=u"s", access=u"read")
868
def created_dbus_property(self):
869
return dbus.String(self._datetime_to_dbus(self.created))
870
871
# last_enabled - property
872
@dbus_service_property(_interface, signature=u"s", access=u"read")
873
def last_enabled_dbus_property(self):
874
if self.last_enabled is None:
875
return dbus.String(u"")
876
return dbus.String(self._datetime_to_dbus(self.last_enabled))
877
878
# enabled - property
879
@dbus_service_property(_interface, signature=u"b",
880
access=u"readwrite")
881
def enabled_dbus_property(self, value=None):
882
if value is None: # get
883
return dbus.Boolean(self.enabled)
884
if value:
885
self.enable()
886
else:
887
self.disable()
888
889
# last_checked_ok - property
890
@dbus_service_property(_interface, signature=u"s",
891
access=u"readwrite")
892
def last_checked_ok_dbus_property(self, value=None):
893
if value is not None:
894
self.checked_ok()
895
return
896
if self.last_checked_ok is None:
897
return dbus.String(u"")
898
return dbus.String(self._datetime_to_dbus(self
899
.last_checked_ok))
900
901
# timeout - property
902
@dbus_service_property(_interface, signature=u"t",
903
access=u"readwrite")
904
def timeout_dbus_property(self, value=None):
905
if value is None: # get
906
return dbus.UInt64(self.timeout_milliseconds())
907
self.timeout = datetime.timedelta(0, 0, 0, value)
908
# Emit D-Bus signal
909
self.PropertyChanged(dbus.String(u"timeout"),
910
dbus.UInt64(value, variant_level=1))
911
if getattr(self, u"disable_initiator_tag", None) is None:
912
return
913
# Reschedule timeout
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = None
916
time_to_die = (self.
917
_timedelta_to_milliseconds((self
918
.last_checked_ok
919
+ self.timeout)
920
- datetime.datetime
921
.utcnow()))
922
if time_to_die <= 0:
923
# The timeout has passed
924
self.disable()
925
else:
926
self.disable_initiator_tag = (gobject.timeout_add
927
(time_to_die, self.disable))
928
929
# interval - property
930
@dbus_service_property(_interface, signature=u"t",
931
access=u"readwrite")
932
def interval_dbus_property(self, value=None):
933
if value is None: # get
934
return dbus.UInt64(self.interval_milliseconds())
935
self.interval = datetime.timedelta(0, 0, 0, value)
936
# Emit D-Bus signal
937
self.PropertyChanged(dbus.String(u"interval"),
938
dbus.UInt64(value, variant_level=1))
939
if getattr(self, u"checker_initiator_tag", None) is None:
940
return
941
# Reschedule checker run
942
gobject.source_remove(self.checker_initiator_tag)
943
self.checker_initiator_tag = (gobject.timeout_add
944
(value, self.start_checker))
945
self.start_checker() # Start one now, too
946
947
# checker - property
948
@dbus_service_property(_interface, signature=u"s",
949
access=u"readwrite")
950
def checker_dbus_property(self, value=None):
951
if value is None: # get
952
return dbus.String(self.checker_command)
953
self.checker_command = value
954
# Emit D-Bus signal
955
self.PropertyChanged(dbus.String(u"checker"),
956
dbus.String(self.checker_command,
957
variant_level=1))
958
959
# checker_running - property
960
@dbus_service_property(_interface, signature=u"b",
961
access=u"readwrite")
962
def checker_running_dbus_property(self, value=None):
963
if value is None: # get
964
return dbus.Boolean(self.checker is not None)
965
if value:
966
self.start_checker()
967
else:
968
self.stop_checker()
969
970
# object_path - property
971
@dbus_service_property(_interface, signature=u"o", access=u"read")
972
def object_path_dbus_property(self):
973
return self.dbus_object_path # is already a dbus.ObjectPath
974
975
# secret = property
976
@dbus_service_property(_interface, signature=u"ay",
977
access=u"write", byte_arrays=True)
978
def secret_dbus_property(self, value):
979
self.secret = str(value)
980
981
del _interface
982
983
984
class ClientHandler(socketserver.BaseRequestHandler, object):
985
"""A class to handle client connections.
986
987
Instantiated once for each connection to handle it.
310
return now < (self.last_seen + self.timeout)
311
312
313
def peer_certificate(session):
314
"Return the peer's OpenPGP certificate as a bytestring"
315
# If not an OpenPGP certificate...
316
if gnutls.library.functions.gnutls_certificate_type_get\
317
(session._c_object) \
318
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
319
# ...do the normal thing
320
return session.peer_certificate
321
list_size = ctypes.c_uint()
322
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
323
(session._c_object, ctypes.byref(list_size))
324
if list_size.value == 0:
325
return None
326
cert = cert_list[0]
327
return ctypes.string_at(cert.data, cert.size)
328
329
330
def fingerprint(openpgp):
331
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
332
# New empty GnuTLS certificate
333
crt = gnutls.library.types.gnutls_openpgp_crt_t()
334
gnutls.library.functions.gnutls_openpgp_crt_init\
335
(ctypes.byref(crt))
336
# New GnuTLS "datum" with the OpenPGP public key
337
datum = gnutls.library.types.gnutls_datum_t\
338
(ctypes.cast(ctypes.c_char_p(openpgp),
339
ctypes.POINTER(ctypes.c_ubyte)),
340
ctypes.c_uint(len(openpgp)))
341
# Import the OpenPGP public key into the certificate
342
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
343
(crt,
344
ctypes.byref(datum),
345
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
346
# New buffer for the fingerprint
347
buffer = ctypes.create_string_buffer(20)
348
buffer_length = ctypes.c_size_t()
349
# Get the fingerprint from the certificate into the buffer
350
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
351
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
352
# Deinit the certificate
353
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
354
# Convert the buffer to a Python bytestring
355
fpr = ctypes.string_at(buffer, buffer_length.value)
356
# Convert the bytestring to hexadecimal notation
357
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
358
return hex_fpr
359
360
361
class tcp_handler(SocketServer.BaseRequestHandler, object):
362
"""A TCP request handler class.
363
Instantiated by IPv6_TCPServer for each request to handle it.
988
364
Note: This will run in its own forked process."""
989
365
990
366
def handle(self):
991
logger.info(u"TCP connection from: %s",
992
unicode(self.client_address))
993
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
994
# Open IPC pipe to parent process
995
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
996
session = (gnutls.connection
997
.ClientSession(self.request,
998
gnutls.connection
999
.X509Credentials()))
1000
1001
line = self.request.makefile().readline()
1002
logger.debug(u"Protocol version: %r", line)
1003
try:
1004
if int(line.strip().split()[0]) > 1:
1005
raise RuntimeError
1006
except (ValueError, IndexError, RuntimeError), error:
1007
logger.error(u"Unknown protocol version: %s", error)
1008
return
1009
1010
# Note: gnutls.connection.X509Credentials is really a
1011
# generic GnuTLS certificate credentials object so long as
1012
# no X.509 keys are added to it. Therefore, we can use it
1013
# here despite using OpenPGP certificates.
1014
1015
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1016
# u"+AES-256-CBC", u"+SHA1",
1017
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1018
# u"+DHE-DSS"))
1019
# Use a fallback default, since this MUST be set.
1020
priority = self.server.gnutls_priority
1021
if priority is None:
1022
priority = u"NORMAL"
1023
(gnutls.library.functions
1024
.gnutls_priority_set_direct(session._c_object,
1025
priority, None))
1026
1027
try:
1028
session.handshake()
1029
except gnutls.errors.GNUTLSError, error:
1030
logger.warning(u"Handshake failed: %s", error)
1031
# Do not run session.bye() here: the session is not
1032
# established. Just abandon the request.
1033
return
1034
logger.debug(u"Handshake succeeded")
1035
try:
1036
fpr = self.fingerprint(self.peer_certificate(session))
1037
except (TypeError, gnutls.errors.GNUTLSError), error:
1038
logger.warning(u"Bad certificate: %s", error)
1039
session.bye()
1040
return
1041
logger.debug(u"Fingerprint: %s", fpr)
1042
1043
for c in self.server.clients:
1044
if c.fingerprint == fpr:
1045
client = c
1046
break
367
logger.debug(u"TCP connection from: %s",
368
unicode(self.client_address))
369
session = gnutls.connection.ClientSession(self.request,
370
gnutls.connection.\
371
X509Credentials())
372
373
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
374
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
375
# "+DHE-DSS"))
376
priority = "NORMAL"
377
if self.server.options.priority:
378
priority = self.server.options.priority
379
gnutls.library.functions.gnutls_priority_set_direct\
380
(session._c_object, priority, None);
381
382
try:
383
session.handshake()
384
except gnutls.errors.GNUTLSError, error:
385
logger.debug(u"Handshake failed: %s", error)
386
# Do not run session.bye() here: the session is not
387
# established. Just abandon the request.
388
return
389
try:
390
fpr = fingerprint(peer_certificate(session))
391
except (TypeError, gnutls.errors.GNUTLSError), error:
392
logger.debug(u"Bad certificate: %s", error)
393
session.bye()
394
return
395
logger.debug(u"Fingerprint: %s", fpr)
396
client = None
397
for c in self.server.clients:
398
if c.fingerprint == fpr:
399
client = c
400
break
401
# Have to check if client.still_valid(), since it is possible
402
# that the client timed out while establishing the GnuTLS
403
# session.
404
if (not client) or (not client.still_valid()):
405
if client:
406
logger.debug(u"Client %(name)s is invalid",
407
vars(client))
1047
408
else:
1048
ipc.write(u"NOTFOUND %s %s\n"
1049
% (fpr, unicode(self.client_address)))
1050
session.bye()
1051
return
1052
# Have to check if client.still_valid(), since it is
1053
# possible that the client timed out while establishing
1054
# the GnuTLS session.
1055
if not client.still_valid():
1056
ipc.write(u"INVALID %s\n" % client.name)
1057
session.bye()
1058
return
1059
ipc.write(u"SENDING %s\n" % client.name)
1060
sent_size = 0
1061
while sent_size < len(client.secret):
1062
sent = session.send(client.secret[sent_size:])
1063
logger.debug(u"Sent: %d, remaining: %d",
1064
sent, len(client.secret)
1065
- (sent_size + sent))
1066
sent_size += sent
409
logger.debug(u"Client not found for fingerprint: %s",
410
fpr)
1067
411
session.bye()
1068
1069
@staticmethod
1070
def peer_certificate(session):
1071
"Return the peer's OpenPGP certificate as a bytestring"
1072
# If not an OpenPGP certificate...
1073
if (gnutls.library.functions
1074
.gnutls_certificate_type_get(session._c_object)
1075
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1076
# ...do the normal thing
1077
return session.peer_certificate
1078
list_size = ctypes.c_uint(1)
1079
cert_list = (gnutls.library.functions
1080
.gnutls_certificate_get_peers
1081
(session._c_object, ctypes.byref(list_size)))
1082
if not bool(cert_list) and list_size.value != 0:
1083
raise gnutls.errors.GNUTLSError(u"error getting peer"
1084
u" certificate")
1085
if list_size.value == 0:
1086
return None
1087
cert = cert_list[0]
1088
return ctypes.string_at(cert.data, cert.size)
1089
1090
@staticmethod
1091
def fingerprint(openpgp):
1092
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1093
# New GnuTLS "datum" with the OpenPGP public key
1094
datum = (gnutls.library.types
1095
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1096
ctypes.POINTER
1097
(ctypes.c_ubyte)),
1098
ctypes.c_uint(len(openpgp))))
1099
# New empty GnuTLS certificate
1100
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1101
(gnutls.library.functions
1102
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1103
# Import the OpenPGP public key into the certificate
1104
(gnutls.library.functions
1105
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1106
gnutls.library.constants
1107
.GNUTLS_OPENPGP_FMT_RAW))
1108
# Verify the self signature in the key
1109
crtverify = ctypes.c_uint()
1110
(gnutls.library.functions
1111
.gnutls_openpgp_crt_verify_self(crt, 0,
1112
ctypes.byref(crtverify)))
1113
if crtverify.value != 0:
1114
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1115
raise (gnutls.errors.CertificateSecurityError
1116
(u"Verify failed"))
1117
# New buffer for the fingerprint
1118
buf = ctypes.create_string_buffer(20)
1119
buf_len = ctypes.c_size_t()
1120
# Get the fingerprint from the certificate into the buffer
1121
(gnutls.library.functions
1122
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1123
ctypes.byref(buf_len)))
1124
# Deinit the certificate
1125
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1126
# Convert the buffer to a Python bytestring
1127
fpr = ctypes.string_at(buf, buf_len.value)
1128
# Convert the bytestring to hexadecimal notation
1129
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1130
return hex_fpr
1131
1132
1133
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1134
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1135
def process_request(self, request, client_address):
1136
"""Overrides and wraps the original process_request().
1137
1138
This function creates a new pipe in self.pipe
1139
"""
1140
self.pipe = os.pipe()
1141
super(ForkingMixInWithPipe,
1142
self).process_request(request, client_address)
1143
os.close(self.pipe[1]) # close write end
1144
self.add_pipe(self.pipe[0])
1145
def add_pipe(self, pipe):
1146
"""Dummy function; override as necessary"""
1147
os.close(pipe)
1148
1149
1150
class IPv6_TCPServer(ForkingMixInWithPipe,
1151
socketserver.TCPServer, object):
1152
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1153
412
return
413
sent_size = 0
414
while sent_size < len(client.secret):
415
sent = session.send(client.secret[sent_size:])
416
logger.debug(u"Sent: %d, remaining: %d",
417
sent, len(client.secret)
418
- (sent_size + sent))
419
sent_size += sent
420
session.bye()
421
422
423
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
424
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1154
425
Attributes:
1155
enabled: Boolean; whether this server is activated yet
1156
interface: None or a network interface name (string)
1157
use_ipv6: Boolean; to use IPv6 or not
426
options: Command line options
427
clients: Set() of Client objects
1158
428
"""
1159
def __init__(self, server_address, RequestHandlerClass,
1160
interface=None, use_ipv6=True):
1161
self.interface = interface
1162
if use_ipv6:
1163
self.address_family = socket.AF_INET6
1164
socketserver.TCPServer.__init__(self, server_address,
1165
RequestHandlerClass)
429
address_family = socket.AF_INET6
430
def __init__(self, *args, **kwargs):
431
if "options" in kwargs:
432
self.options = kwargs["options"]
433
del kwargs["options"]
434
if "clients" in kwargs:
435
self.clients = kwargs["clients"]
436
del kwargs["clients"]
437
return super(type(self), self).__init__(*args, **kwargs)
1166
438
def server_bind(self):
1167
439
"""This overrides the normal server_bind() function
1168
440
to bind to an interface if one was specified, and also NOT to
1169
441
bind to an address or port if they were not specified."""
1170
if self.interface is not None:
1171
if SO_BINDTODEVICE is None:
1172
logger.error(u"SO_BINDTODEVICE does not exist;"
1173
u" cannot bind to interface %s",
1174
self.interface)
1175
else:
1176
try:
1177
self.socket.setsockopt(socket.SOL_SOCKET,
1178
SO_BINDTODEVICE,
1179
str(self.interface
1180
+ u'\0'))
1181
except socket.error, error:
1182
if error[0] == errno.EPERM:
1183
logger.error(u"No permission to"
1184
u" bind to interface %s",
1185
self.interface)
1186
elif error[0] == errno.ENOPROTOOPT:
1187
logger.error(u"SO_BINDTODEVICE not available;"
1188
u" cannot bind to interface %s",
1189
self.interface)
1190
else:
1191
raise
442
if self.options.interface:
443
if not hasattr(socket, "SO_BINDTODEVICE"):
444
# From /usr/include/asm-i486/socket.h
445
socket.SO_BINDTODEVICE = 25
446
try:
447
self.socket.setsockopt(socket.SOL_SOCKET,
448
socket.SO_BINDTODEVICE,
449
self.options.interface)
450
except socket.error, error:
451
if error[0] == errno.EPERM:
452
logger.warning(u"No permission to"
453
u" bind to interface %s",
454
self.options.interface)
455
else:
456
raise error
1192
457
# Only bind(2) the socket if we really need to.
1193
458
if self.server_address[0] or self.server_address[1]:
1194
459
if not self.server_address[0]:
1195
if self.address_family == socket.AF_INET6:
1196
any_address = u"::" # in6addr_any
1197
else:
1198
any_address = socket.INADDR_ANY
1199
self.server_address = (any_address,
460
in6addr_any = "::"
461
self.server_address = (in6addr_any,
1200
462
self.server_address[1])
1201
elif not self.server_address[1]:
463
elif self.server_address[1] is None:
1202
464
self.server_address = (self.server_address[0],
1203
465
0)
1204
# if self.interface:
1205
# self.server_address = (self.server_address[0],
1206
# 0, # port
1207
# 0, # flowinfo
1208
# if_nametoindex
1209
# (self.interface))
1210
return socketserver.TCPServer.server_bind(self)
1211
1212
1213
class MandosServer(IPv6_TCPServer):
1214
"""Mandos server.
1215
1216
Attributes:
1217
clients: set of Client objects
1218
gnutls_priority GnuTLS priority string
1219
use_dbus: Boolean; to emit D-Bus signals or not
1220
1221
Assumes a gobject.MainLoop event loop.
1222
"""
1223
def __init__(self, server_address, RequestHandlerClass,
1224
interface=None, use_ipv6=True, clients=None,
1225
gnutls_priority=None, use_dbus=True):
1226
self.enabled = False
1227
self.clients = clients
1228
if self.clients is None:
1229
self.clients = set()
1230
self.use_dbus = use_dbus
1231
self.gnutls_priority = gnutls_priority
1232
IPv6_TCPServer.__init__(self, server_address,
1233
RequestHandlerClass,
1234
interface = interface,
1235
use_ipv6 = use_ipv6)
1236
def server_activate(self):
1237
if self.enabled:
1238
return socketserver.TCPServer.server_activate(self)
1239
def enable(self):
1240
self.enabled = True
1241
def add_pipe(self, pipe):
1242
# Call "handle_ipc" for both data and EOF events
1243
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1244
self.handle_ipc)
1245
def handle_ipc(self, source, condition, file_objects={}):
1246
condition_names = {
1247
gobject.IO_IN: u"IN", # There is data to read.
1248
gobject.IO_OUT: u"OUT", # Data can be written (without
1249
# blocking).
1250
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1251
gobject.IO_ERR: u"ERR", # Error condition.
1252
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1253
# broken, usually for pipes and
1254
# sockets).
1255
}
1256
conditions_string = ' | '.join(name
1257
for cond, name in
1258
condition_names.iteritems()
1259
if cond & condition)
1260
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1261
conditions_string)
1262
1263
# Turn the pipe file descriptor into a Python file object
1264
if source not in file_objects:
1265
file_objects[source] = os.fdopen(source, u"r", 1)
1266
1267
# Read a line from the file object
1268
cmdline = file_objects[source].readline()
1269
if not cmdline: # Empty line means end of file
1270
# close the IPC pipe
1271
file_objects[source].close()
1272
del file_objects[source]
1273
1274
# Stop calling this function
1275
return False
1276
1277
logger.debug(u"IPC command: %r", cmdline)
1278
1279
# Parse and act on command
1280
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1281
1282
if cmd == u"NOTFOUND":
1283
logger.warning(u"Client not found for fingerprint: %s",
1284
args)
1285
if self.use_dbus:
1286
# Emit D-Bus signal
1287
mandos_dbus_service.ClientNotFound(args)
1288
elif cmd == u"INVALID":
1289
for client in self.clients:
1290
if client.name == args:
1291
logger.warning(u"Client %s is invalid", args)
1292
if self.use_dbus:
1293
# Emit D-Bus signal
1294
client.Rejected()
1295
break
1296
else:
1297
logger.error(u"Unknown client %s is invalid", args)
1298
elif cmd == u"SENDING":
1299
for client in self.clients:
1300
if client.name == args:
1301
logger.info(u"Sending secret to %s", client.name)
1302
client.checked_ok()
1303
if self.use_dbus:
1304
# Emit D-Bus signal
1305
client.GotSecret()
1306
break
1307
else:
1308
logger.error(u"Sending secret to unknown client %s",
1309
args)
1310
else:
1311
logger.error(u"Unknown IPC command: %r", cmdline)
1312
1313
# Keep calling this function
1314
return True
466
return super(type(self), self).server_bind()
1315
467
1316
468
1317
469
def string_to_delta(interval):
1318
470
"""Parse a string and return a datetime.timedelta
1319
1320
>>> string_to_delta(u'7d')
471
472
>>> string_to_delta('7d')
1321
473
datetime.timedelta(7)
1322
>>> string_to_delta(u'60s')
474
>>> string_to_delta('60s')
1323
475
datetime.timedelta(0, 60)
1324
>>> string_to_delta(u'60m')
476
>>> string_to_delta('60m')
1325
477
datetime.timedelta(0, 3600)
1326
>>> string_to_delta(u'24h')
478
>>> string_to_delta('24h')
1327
479
datetime.timedelta(1)
1328
480
>>> string_to_delta(u'1w')
1329
481
datetime.timedelta(7)
1330
>>> string_to_delta(u'5m 30s')
1331
datetime.timedelta(0, 330)
1332
482
"""
1333
timevalue = datetime.timedelta(0)
1334
for s in interval.split():
1335
try:
1336
suffix = unicode(s[-1])
1337
value = int(s[:-1])
1338
if suffix == u"d":
1339
delta = datetime.timedelta(value)
1340
elif suffix == u"s":
1341
delta = datetime.timedelta(0, value)
1342
elif suffix == u"m":
1343
delta = datetime.timedelta(0, 0, 0, 0, value)
1344
elif suffix == u"h":
1345
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1346
elif suffix == u"w":
1347
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1348
else:
1349
raise ValueError(u"Unknown suffix %r" % suffix)
1350
except (ValueError, IndexError), e:
1351
raise ValueError(e.message)
1352
timevalue += delta
1353
return timevalue
483
try:
484
suffix=unicode(interval[-1])
485
value=int(interval[:-1])
486
if suffix == u"d":
487
delta = datetime.timedelta(value)
488
elif suffix == u"s":
489
delta = datetime.timedelta(0, value)
490
elif suffix == u"m":
491
delta = datetime.timedelta(0, 0, 0, 0, value)
492
elif suffix == u"h":
493
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
494
elif suffix == u"w":
495
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
496
else:
497
raise ValueError
498
except (ValueError, IndexError):
499
raise ValueError
500
return delta
501
502
503
def add_service():
504
"""Derived from the Avahi example code"""
505
global group, serviceName, serviceType, servicePort, serviceTXT, \
506
domain, host
507
if group is None:
508
group = dbus.Interface(
509
bus.get_object( avahi.DBUS_NAME,
510
server.EntryGroupNew()),
511
avahi.DBUS_INTERFACE_ENTRY_GROUP)
512
group.connect_to_signal('StateChanged',
513
entry_group_state_changed)
514
logger.debug(u"Adding service '%s' of type '%s' ...",
515
serviceName, serviceType)
516
517
group.AddService(
518
serviceInterface, # interface
519
avahi.PROTO_INET6, # protocol
520
dbus.UInt32(0), # flags
521
serviceName, serviceType,
522
domain, host,
523
dbus.UInt16(servicePort),
524
avahi.string_array_to_txt_array(serviceTXT))
525
group.Commit()
526
527
528
def remove_service():
529
"""From the Avahi example code"""
530
global group
531
532
if not group is None:
533
group.Reset()
534
535
536
def server_state_changed(state):
537
"""Derived from the Avahi example code"""
538
if state == avahi.SERVER_COLLISION:
539
logger.warning(u"Server name collision")
540
remove_service()
541
elif state == avahi.SERVER_RUNNING:
542
add_service()
543
544
545
def entry_group_state_changed(state, error):
546
"""Derived from the Avahi example code"""
547
global serviceName, server, rename_count
548
549
logger.debug(u"state change: %i", state)
550
551
if state == avahi.ENTRY_GROUP_ESTABLISHED:
552
logger.debug(u"Service established.")
553
elif state == avahi.ENTRY_GROUP_COLLISION:
554
555
rename_count = rename_count - 1
556
if rename_count > 0:
557
name = server.GetAlternativeServiceName(name)
558
logger.warning(u"Service name collision, "
559
u"changing name to '%s' ...", name)
560
remove_service()
561
add_service()
562
563
else:
564
logger.error(u"No suitable service name found after %i"
565
u" retries, exiting.", n_rename)
566
killme(1)
567
elif state == avahi.ENTRY_GROUP_FAILURE:
568
logger.error(u"Error in group state changed %s",
569
unicode(error))
570
killme(1)
1354
571
1355
572
1356
573
def if_nametoindex(interface):
1357
"""Call the C function if_nametoindex(), or equivalent
1358
1359
Note: This function cannot accept a unicode string."""
1360
global if_nametoindex
574
"""Call the C function if_nametoindex()"""
1361
575
try:
1362
if_nametoindex = (ctypes.cdll.LoadLibrary
1363
(ctypes.util.find_library(u"c"))
1364
.if_nametoindex)
576
libc = ctypes.cdll.LoadLibrary("libc.so.6")
577
return libc.if_nametoindex(interface)
1365
578
except (OSError, AttributeError):
1366
logger.warning(u"Doing if_nametoindex the hard way")
1367
def if_nametoindex(interface):
1368
"Get an interface index the hard way, i.e. using fcntl()"
1369
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1370
with closing(socket.socket()) as s:
1371
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1372
struct.pack(str(u"16s16x"),
1373
interface))
1374
interface_index = struct.unpack(str(u"I"),
1375
ifreq[16:20])[0]
1376
return interface_index
1377
return if_nametoindex(interface)
1378
1379
1380
def daemon(nochdir = False, noclose = False):
579
if "struct" not in sys.modules:
580
import struct
581
if "fcntl" not in sys.modules:
582
import fcntl
583
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
584
s = socket.socket()
585
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
586
struct.pack("16s16x", interface))
587
s.close()
588
interface_index = struct.unpack("I", ifreq[16:20])[0]
589
return interface_index
590
591
592
def daemon(nochdir, noclose):
1381
593
"""See daemon(3). Standard BSD Unix function.
1382
1383
594
This should really exist as os.daemon, but it doesn't (yet)."""
1384
595
if os.fork():
1385
596
sys.exit()
1386
597
os.setsid()
1387
598
if not nochdir:
1388
os.chdir(u"/")
1389
if os.fork():
1390
sys.exit()
599
os.chdir("/")
1391
600
if not noclose:
1392
601
# Close all standard open file descriptors
1393
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
602
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
1394
603
if not stat.S_ISCHR(os.fstat(null).st_mode):
1395
604
raise OSError(errno.ENODEV,
1396
u"%s not a character device"
1397
% os.path.devnull)
605
"/dev/null not a character device")
1398
606
os.dup2(null, sys.stdin.fileno())
1399
607
os.dup2(null, sys.stdout.fileno())
1400
608
os.dup2(null, sys.stderr.fileno())
1402
610
os.close(null)
1403
611
1404
612
613
def killme(status = 0):
614
logger.debug("Stopping server with exit status %d", status)
615
exitstatus = status
616
if main_loop_started:
617
main_loop.quit()
618
else:
619
sys.exit(status)
620
621
1405
622
def main():
1406
1407
##################################################################
1408
# Parsing of options, both command line and config file
1409
1410
parser = optparse.OptionParser(version = "%%prog %s" % version)
1411
parser.add_option("-i", u"--interface", type=u"string",
1412
metavar="IF", help=u"Bind to interface IF")
1413
parser.add_option("-a", u"--address", type=u"string",
1414
help=u"Address to listen for requests on")
1415
parser.add_option("-p", u"--port", type=u"int",
1416
help=u"Port number to receive requests on")
1417
parser.add_option("--check", action=u"store_true",
1418
help=u"Run self-test")
1419
parser.add_option("--debug", action=u"store_true",
1420
help=u"Debug mode; run in foreground and log to"
1421
u" terminal")
1422
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1423
u" priority string (see GnuTLS documentation)")
1424
parser.add_option("--servicename", type=u"string",
1425
metavar=u"NAME", help=u"Zeroconf service name")
1426
parser.add_option("--configdir", type=u"string",
1427
default=u"/etc/mandos", metavar=u"DIR",
1428
help=u"Directory to search for configuration"
1429
u" files")
1430
parser.add_option("--no-dbus", action=u"store_false",
1431
dest=u"use_dbus", help=u"Do not provide D-Bus"
1432
u" system bus interface")
1433
parser.add_option("--no-ipv6", action=u"store_false",
1434
dest=u"use_ipv6", help=u"Do not use IPv6")
1435
options = parser.parse_args()[0]
623
global exitstatus
624
exitstatus = 0
625
global main_loop_started
626
main_loop_started = False
627
628
parser = OptionParser()
629
parser.add_option("-i", "--interface", type="string",
630
default=None, metavar="IF",
631
help="Bind to interface IF")
632
parser.add_option("-a", "--address", type="string", default=None,
633
help="Address to listen for requests on")
634
parser.add_option("-p", "--port", type="int", default=None,
635
help="Port number to receive requests on")
636
parser.add_option("--check", action="store_true", default=False,
637
help="Run self-test")
638
parser.add_option("--debug", action="store_true", default=False,
639
help="Debug mode")
640
parser.add_option("--priority", type="string",
641
default="SECURE256",
642
help="GnuTLS priority string"
643
" (see GnuTLS documentation)")
644
parser.add_option("--servicename", type="string",
645
default="Mandos", help="Zeroconf service name")
646
(options, args) = parser.parse_args()
1436
647
1437
648
if options.check:
1438
649
import doctest
1439
650
doctest.testmod()
1440
651
sys.exit()
1441
652
1442
# Default values for config file for server-global settings
1443
server_defaults = { u"interface": u"",
1444
u"address": u"",
1445
u"port": u"",
1446
u"debug": u"False",
1447
u"priority":
1448
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1449
u"servicename": u"Mandos",
1450
u"use_dbus": u"True",
1451
u"use_ipv6": u"True",
1452
}
1453
1454
# Parse config file for server-global settings
1455
server_config = configparser.SafeConfigParser(server_defaults)
1456
del server_defaults
1457
server_config.read(os.path.join(options.configdir,
1458
u"mandos.conf"))
1459
# Convert the SafeConfigParser object to a dict
1460
server_settings = server_config.defaults()
1461
# Use the appropriate methods on the non-string config options
1462
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1463
server_settings[option] = server_config.getboolean(u"DEFAULT",
1464
option)
1465
if server_settings["port"]:
1466
server_settings["port"] = server_config.getint(u"DEFAULT",
1467
u"port")
1468
del server_config
1469
1470
# Override the settings from the config file with command line
1471
# options, if set.
1472
for option in (u"interface", u"address", u"port", u"debug",
1473
u"priority", u"servicename", u"configdir",
1474
u"use_dbus", u"use_ipv6"):
1475
value = getattr(options, option)
1476
if value is not None:
1477
server_settings[option] = value
1478
del options
1479
# Force all strings to be unicode
1480
for option in server_settings.keys():
1481
if type(server_settings[option]) is str:
1482
server_settings[option] = unicode(server_settings[option])
1483
# Now we have our good server settings in "server_settings"
1484
1485
##################################################################
1486
1487
# For convenience
1488
debug = server_settings[u"debug"]
1489
use_dbus = server_settings[u"use_dbus"]
1490
use_ipv6 = server_settings[u"use_ipv6"]
1491
1492
if not debug:
1493
syslogger.setLevel(logging.WARNING)
1494
console.setLevel(logging.WARNING)
1495
1496
if server_settings[u"servicename"] != u"Mandos":
1497
syslogger.setFormatter(logging.Formatter
1498
(u'Mandos (%s) [%%(process)d]:'
1499
u' %%(levelname)s: %%(message)s'
1500
% server_settings[u"servicename"]))
1501
1502
# Parse config file with clients
1503
client_defaults = { u"timeout": u"1h",
1504
u"interval": u"5m",
1505
u"checker": u"fping -q -- %%(host)s",
1506
u"host": u"",
1507
}
1508
client_config = configparser.SafeConfigParser(client_defaults)
1509
client_config.read(os.path.join(server_settings[u"configdir"],
1510
u"clients.conf"))
1511
1512
global mandos_dbus_service
1513
mandos_dbus_service = None
1514
1515
tcp_server = MandosServer((server_settings[u"address"],
1516
server_settings[u"port"]),
1517
ClientHandler,
1518
interface=server_settings[u"interface"],
1519
use_ipv6=use_ipv6,
1520
gnutls_priority=
1521
server_settings[u"priority"],
1522
use_dbus=use_dbus)
1523
pidfilename = u"/var/run/mandos.pid"
1524
try:
1525
pidfile = open(pidfilename, u"w")
1526
except IOError:
1527
logger.error(u"Could not open file %r", pidfilename)
1528
1529
try:
1530
uid = pwd.getpwnam(u"_mandos").pw_uid
1531
gid = pwd.getpwnam(u"_mandos").pw_gid
1532
except KeyError:
1533
try:
1534
uid = pwd.getpwnam(u"mandos").pw_uid
1535
gid = pwd.getpwnam(u"mandos").pw_gid
1536
except KeyError:
1537
try:
1538
uid = pwd.getpwnam(u"nobody").pw_uid
1539
gid = pwd.getpwnam(u"nobody").pw_gid
1540
except KeyError:
1541
uid = 65534
1542
gid = 65534
1543
try:
1544
os.setgid(gid)
1545
os.setuid(uid)
1546
except OSError, error:
1547
if error[0] != errno.EPERM:
1548
raise error
1549
1550
# Enable all possible GnuTLS debugging
1551
if debug:
1552
# "Use a log level over 10 to enable all debugging options."
1553
# - GnuTLS manual
1554
gnutls.library.functions.gnutls_global_set_log_level(11)
1555
1556
@gnutls.library.types.gnutls_log_func
1557
def debug_gnutls(level, string):
1558
logger.debug(u"GnuTLS: %s", string[:-1])
1559
1560
(gnutls.library.functions
1561
.gnutls_global_set_log_function(debug_gnutls))
653
# Parse config file
654
defaults = { "timeout": "1h",
655
"interval": "5m",
656
"checker": "fping -q -- %%(fqdn)s",
657
}
658
client_config = ConfigParser.SafeConfigParser(defaults)
659
#client_config.readfp(open("global.conf"), "global.conf")
660
client_config.read("mandos-clients.conf")
661
662
global serviceName
663
serviceName = options.servicename;
1562
664
1563
665
global main_loop
666
global bus
667
global server
1564
668
# From the Avahi example code
1565
669
DBusGMainLoop(set_as_default=True )
1566
670
main_loop = gobject.MainLoop()
1567
671
bus = dbus.SystemBus()
672
server = dbus.Interface(
673
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
674
avahi.DBUS_INTERFACE_SERVER )
1568
675
# End of Avahi example code
1569
if use_dbus:
1570
try:
1571
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1572
bus, do_not_queue=True)
1573
except dbus.exceptions.NameExistsException, e:
1574
logger.error(unicode(e) + u", disabling D-Bus")
1575
use_dbus = False
1576
server_settings[u"use_dbus"] = False
1577
tcp_server.use_dbus = False
1578
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1579
service = AvahiService(name = server_settings[u"servicename"],
1580
servicetype = u"_mandos._tcp",
1581
protocol = protocol, bus = bus)
1582
if server_settings["interface"]:
1583
service.interface = (if_nametoindex
1584
(str(server_settings[u"interface"])))
1585
676
1586
client_class = Client
1587
if use_dbus:
1588
client_class = functools.partial(ClientDBus, bus = bus)
1589
tcp_server.clients.update(set(
1590
client_class(name = section,
1591
config= dict(client_config.items(section)))
1592
for section in client_config.sections()))
1593
if not tcp_server.clients:
1594
logger.warning(u"No clients defined")
677
debug = options.debug
1595
678
1596
679
if debug:
1597
# Redirect stdin so all checkers get /dev/null
1598
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1599
os.dup2(null, sys.stdin.fileno())
1600
if null > 2:
1601
os.close(null)
1602
else:
1603
# No console logging
1604
logger.removeHandler(console)
1605
# Close all input and output, do double fork, etc.
1606
daemon()
1607
1608
try:
1609
with closing(pidfile):
1610
pid = os.getpid()
1611
pidfile.write(str(pid) + "\n")
1612
del pidfile
1613
except IOError:
1614
logger.error(u"Could not write to file %r with PID %d",
1615
pidfilename, pid)
1616
except NameError:
1617
# "pidfile" was never created
1618
pass
1619
del pidfilename
680
console = logging.StreamHandler()
681
# console.setLevel(logging.DEBUG)
682
console.setFormatter(logging.Formatter\
683
('%(levelname)s: %(message)s'))
684
logger.addHandler(console)
685
del console
686
687
clients = Set()
688
def remove_from_clients(client):
689
clients.remove(client)
690
if not clients:
691
logger.debug(u"No clients left, exiting")
692
killme()
693
694
clients.update(Set(Client(name=section,
695
stop_hook = remove_from_clients,
696
**(dict(client_config\
697
.items(section))))
698
for section in client_config.sections()))
1620
699
1621
700
if not debug:
1622
signal.signal(signal.SIGINT, signal.SIG_IGN)
1623
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1624
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1625
1626
if use_dbus:
1627
class MandosDBusService(dbus.service.Object):
1628
"""A D-Bus proxy object"""
1629
def __init__(self):
1630
dbus.service.Object.__init__(self, bus, u"/")
1631
_interface = u"se.bsnet.fukt.Mandos"
1632
1633
@dbus.service.signal(_interface, signature=u"oa{sv}")
1634
def ClientAdded(self, objpath, properties):
1635
"D-Bus signal"
1636
pass
1637
1638
@dbus.service.signal(_interface, signature=u"s")
1639
def ClientNotFound(self, fingerprint):
1640
"D-Bus signal"
1641
pass
1642
1643
@dbus.service.signal(_interface, signature=u"os")
1644
def ClientRemoved(self, objpath, name):
1645
"D-Bus signal"
1646
pass
1647
1648
@dbus.service.method(_interface, out_signature=u"ao")
1649
def GetAllClients(self):
1650
"D-Bus method"
1651
return dbus.Array(c.dbus_object_path
1652
for c in tcp_server.clients)
1653
1654
@dbus.service.method(_interface,
1655
out_signature=u"a{oa{sv}}")
1656
def GetAllClientsWithProperties(self):
1657
"D-Bus method"
1658
return dbus.Dictionary(
1659
((c.dbus_object_path, c.GetAll(u""))
1660
for c in tcp_server.clients),
1661
signature=u"oa{sv}")
1662
1663
@dbus.service.method(_interface, in_signature=u"o")
1664
def RemoveClient(self, object_path):
1665
"D-Bus method"
1666
for c in tcp_server.clients:
1667
if c.dbus_object_path == object_path:
1668
tcp_server.clients.remove(c)
1669
c.remove_from_connection()
1670
# Don't signal anything except ClientRemoved
1671
c.disable(quiet=True)
1672
# Emit D-Bus signal
1673
self.ClientRemoved(object_path, c.name)
1674
return
1675
raise KeyError(object_path)
1676
1677
del _interface
1678
1679
mandos_dbus_service = MandosDBusService()
701
daemon(False, False)
1680
702
1681
703
def cleanup():
1682
704
"Cleanup function; run on exit"
1683
service.cleanup()
1684
1685
while tcp_server.clients:
1686
client = tcp_server.clients.pop()
1687
if use_dbus:
1688
client.remove_from_connection()
1689
client.disable_hook = None
1690
# Don't signal anything except ClientRemoved
1691
client.disable(quiet=True)
1692
if use_dbus:
1693
# Emit D-Bus signal
1694
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1695
client.name)
1696
1697
atexit.register(cleanup)
1698
1699
for client in tcp_server.clients:
1700
if use_dbus:
1701
# Emit D-Bus signal
1702
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1703
client.GetAll(u""))
1704
client.enable()
1705
1706
tcp_server.enable()
1707
tcp_server.server_activate()
1708
1709
# Find out what port we got
1710
service.port = tcp_server.socket.getsockname()[1]
1711
if use_ipv6:
1712
logger.info(u"Now listening on address %r, port %d,"
1713
" flowinfo %d, scope_id %d"
1714
% tcp_server.socket.getsockname())
1715
else: # IPv4
1716
logger.info(u"Now listening on address %r, port %d"
1717
% tcp_server.socket.getsockname())
1718
1719
#service.interface = tcp_server.socket.getsockname()[3]
1720
1721
try:
705
global group
1722
706
# From the Avahi example code
1723
try:
1724
service.activate()
1725
except dbus.exceptions.DBusException, error:
1726
logger.critical(u"DBusException: %s", error)
1727
cleanup()
1728
sys.exit(1)
707
if not group is None:
708
group.Free()
709
group = None
1729
710
# End of Avahi example code
1730
711
1731
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1732
lambda *args, **kwargs:
1733
(tcp_server.handle_request
1734
(*args[2:], **kwargs) or True))
1735
1736
logger.debug(u"Starting main loop")
712
while clients:
713
client = clients.pop()
714
client.stop_hook = None
715
client.stop()
716
717
atexit.register(cleanup)
718
719
if not debug:
720
signal.signal(signal.SIGINT, signal.SIG_IGN)
721
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
722
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
723
724
for client in clients:
725
client.start()
726
727
tcp_server = IPv6_TCPServer((options.address, options.port),
728
tcp_handler,
729
options=options,
730
clients=clients)
731
# Find out what random port we got
732
global servicePort
733
servicePort = tcp_server.socket.getsockname()[1]
734
logger.debug(u"Now listening on port %d", servicePort)
735
736
if options.interface is not None:
737
global serviceInterface
738
serviceInterface = if_nametoindex(options.interface)
739
740
# From the Avahi example code
741
server.connect_to_signal("StateChanged", server_state_changed)
742
try:
743
server_state_changed(server.GetState())
744
except dbus.exceptions.DBusException, error:
745
logger.critical(u"DBusException: %s", error)
746
killme(1)
747
# End of Avahi example code
748
749
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
750
lambda *args, **kwargs:
751
tcp_server.handle_request(*args[2:],
752
**kwargs) or True)
753
try:
754
logger.debug("Starting main loop")
755
main_loop_started = True
1737
756
main_loop.run()
1738
except AvahiError, error:
1739
logger.critical(u"AvahiError: %s", error)
1740
cleanup()
1741
sys.exit(1)
1742
757
except KeyboardInterrupt:
1743
758
if debug:
1744
print >> sys.stderr
1745
logger.debug(u"Server received KeyboardInterrupt")
1746
logger.debug(u"Server exiting")
1747
# Must run before the D-Bus bus name gets deregistered
1748
cleanup()
759
print
760
761
sys.exit(exitstatus)
1749
762
1750
763
if __name__ == '__main__':
1751
764
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0