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- Committer: Teddy Hogeborn
- Date: 2008-07-19 18:43:24 UTC
- Revision ID: teddy@fukt.bsnet.se-20080719184324-iwhoa5in75xa0u2u
* mandos-clients.conf ([foo]/dn, [foo]/password, [braxen_client]/dn,
[braxen_client]/password): Removed.
([foo]/fingerprint, [braxen_client]/fingerprint): New.
([foo]/checker): New.
([foo]/secfile): New.
([braxen_client]/secret): New.
* server.py: New "--debug" option to set debug flag. Removed "cert",
"key", "ca", "crl", and "cred" variables. Added default
value for "checker" config file setting. Do not pass
credentials to IPv6_TCPServer constructor.
(debug): New global debug flag. Used by most debugging output code.
(Client.__init__): Keyword argument "dn" replaced by "fingerprint",
"password" renamed to "secret", and "passfile"
renamed to "secfile". New keyword argument
"checker". All callers changed.
(Client.dn): Removed.
(Client.fingerprint): New.
(Client.password): Renamed to "secret"; all users changed.
(Client.passfile): Renamed to "secfile"; all users changed.
(Client.timeout, Client.interval): Changed to be properties; now
automatically updates the
"_timeout_milliseconds" and
"_interval_milliseconds" values.
(Client.timeout_milliseconds): Renamed to "_timeout_milliseconds".
(Client.interval_milliseconds): Renamed to "_interval_milliseconds".
(Client.check_command): New.
(Client.start_checker): Use the new "check_command" attribute.
(peer_certificate, fingerprint): New functions.
(tcp_handler.handle): Use ClientSession with empty credentials
object instead of ServerSession. Set gnutls
priority string. Do not verify peer. Use
fingerprint instead of DN when searching for
clients. Bug fix: Loop sending data so even large
secret data strings are sent.
(IPv6_TCPServer.credentials): Removed.
(if_nametoindex): Do not import ctypes since that is now imported
globally.
[braxen_client]/password): Removed.
([foo]/fingerprint, [braxen_client]/fingerprint): New.
([foo]/checker): New.
([foo]/secfile): New.
([braxen_client]/secret): New.
* server.py: New "--debug" option to set debug flag. Removed "cert",
"key", "ca", "crl", and "cred" variables. Added default
value for "checker" config file setting. Do not pass
credentials to IPv6_TCPServer constructor.
(debug): New global debug flag. Used by most debugging output code.
(Client.__init__): Keyword argument "dn" replaced by "fingerprint",
"password" renamed to "secret", and "passfile"
renamed to "secfile". New keyword argument
"checker". All callers changed.
(Client.dn): Removed.
(Client.fingerprint): New.
(Client.password): Renamed to "secret"; all users changed.
(Client.passfile): Renamed to "secfile"; all users changed.
(Client.timeout, Client.interval): Changed to be properties; now
automatically updates the
"_timeout_milliseconds" and
"_interval_milliseconds" values.
(Client.timeout_milliseconds): Renamed to "_timeout_milliseconds".
(Client.interval_milliseconds): Renamed to "_interval_milliseconds".
(Client.check_command): New.
(Client.start_checker): Use the new "check_command" attribute.
(peer_certificate, fingerprint): New functions.
(tcp_handler.handle): Use ClientSession with empty credentials
object instead of ServerSession. Set gnutls
priority string. Do not verify peer. Use
fingerprint instead of DN when searching for
clients. Bug fix: Loop sending data so even large
secret data strings are sent.
(IPv6_TCPServer.credentials): Removed.
(if_nametoindex): Do not import ctypes since that is now imported
globally.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- plugins.d
- files renamed:
- clients.conf => mandos-clients.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
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".
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# 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
2
3
from __future__ import division
4
5
import SocketServer
37
6
import socket
38
import optparse
7
import select
8
from optparse import OptionParser
39
9
import datetime
40
10
import errno
41
11
import gnutls.crypto
44
14
import gnutls.library.functions
45
15
import gnutls.library.constants
46
16
import gnutls.library.types
47
import ConfigParser as configparser
17
import ConfigParser
48
18
import sys
49
19
import re
50
20
import os
51
21
import signal
22
from sets import Set
52
23
import subprocess
53
import atexit
54
import stat
55
import logging
56
import logging.handlers
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import select
64
24
65
25
import dbus
66
import dbus.service
67
26
import gobject
68
27
import avahi
69
28
from dbus.mainloop.glib import DBusGMainLoop
70
29
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
logger = logging.Logger(u'mandos')
87
syslogger = (logging.handlers.SysLogHandler
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
89
address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
93
logger.addHandler(syslogger)
94
95
console = logging.StreamHandler()
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
99
logger.addHandler(console)
100
101
class AvahiError(Exception):
102
def __init__(self, value, *args, **kwargs):
103
self.value = value
104
super(AvahiError, self).__init__(value, *args, **kwargs)
105
def __unicode__(self):
106
return unicode(repr(self.value))
107
108
class AvahiServiceError(AvahiError):
109
pass
110
111
class AvahiGroupError(AvahiError):
112
pass
113
114
115
class AvahiService(object):
116
"""An Avahi (Zeroconf) service.
117
118
Attributes:
119
interface: integer; avahi.IF_UNSPEC or an interface index.
120
Used to optionally bind to the specified interface.
121
name: string; Example: u'Mandos'
122
type: string; Example: u'_mandos._tcp'.
123
See <http://www.dns-sd.org/ServiceTypes.html>
124
port: integer; what port to announce
125
TXT: list of strings; TXT record for the service
126
domain: string; Domain to publish on, default to .local if empty.
127
host: string; Host to publish records for, default is localhost
128
max_renames: integer; maximum number of renames
129
rename_count: integer; counter so we only rename after collisions
130
a sensible number of times
131
group: D-Bus Entry Group
132
server: D-Bus Server
133
bus: dbus.SystemBus()
134
"""
135
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
136
servicetype = None, port = None, TXT = None,
137
domain = u"", host = u"", max_renames = 32768,
138
protocol = avahi.PROTO_UNSPEC, bus = None):
139
self.interface = interface
140
self.name = name
141
self.type = servicetype
142
self.port = port
143
self.TXT = TXT if TXT is not None else []
144
self.domain = domain
145
self.host = host
146
self.rename_count = 0
147
self.max_renames = max_renames
148
self.protocol = protocol
149
self.group = None # our entry group
150
self.server = None
151
self.bus = bus
152
def rename(self):
153
"""Derived from the Avahi example code"""
154
if self.rename_count >= self.max_renames:
155
logger.critical(u"No suitable Zeroconf service name found"
156
u" after %i retries, exiting.",
157
self.rename_count)
158
raise AvahiServiceError(u"Too many renames")
159
self.name = self.server.GetAlternativeServiceName(self.name)
160
logger.info(u"Changing Zeroconf service name to %r ...",
161
unicode(self.name))
162
syslogger.setFormatter(logging.Formatter
163
(u'Mandos (%s) [%%(process)d]:'
164
u' %%(levelname)s: %%(message)s'
165
% self.name))
166
self.remove()
167
self.add()
168
self.rename_count += 1
169
def remove(self):
170
"""Derived from the Avahi example code"""
171
if self.group is not None:
172
self.group.Reset()
173
def add(self):
174
"""Derived from the Avahi example code"""
175
if self.group is None:
176
self.group = dbus.Interface(
177
self.bus.get_object(avahi.DBUS_NAME,
178
self.server.EntryGroupNew()),
179
avahi.DBUS_INTERFACE_ENTRY_GROUP)
180
self.group.connect_to_signal('StateChanged',
181
self
182
.entry_group_state_changed)
183
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
184
self.name, self.type)
185
self.group.AddService(
186
self.interface,
187
self.protocol,
188
dbus.UInt32(0), # flags
189
self.name, self.type,
190
self.domain, self.host,
191
dbus.UInt16(self.port),
192
avahi.string_array_to_txt_array(self.TXT))
193
self.group.Commit()
194
def entry_group_state_changed(self, state, error):
195
"""Derived from the Avahi example code"""
196
logger.debug(u"Avahi state change: %i", state)
197
198
if state == avahi.ENTRY_GROUP_ESTABLISHED:
199
logger.debug(u"Zeroconf service established.")
200
elif state == avahi.ENTRY_GROUP_COLLISION:
201
logger.warning(u"Zeroconf service name collision.")
202
self.rename()
203
elif state == avahi.ENTRY_GROUP_FAILURE:
204
logger.critical(u"Avahi: Error in group state changed %s",
205
unicode(error))
206
raise AvahiGroupError(u"State changed: %s"
207
% unicode(error))
208
def cleanup(self):
209
"""Derived from the Avahi example code"""
210
if self.group is not None:
211
self.group.Free()
212
self.group = None
213
def server_state_changed(self, state):
214
"""Derived from the Avahi example code"""
215
if state == avahi.SERVER_COLLISION:
216
logger.error(u"Zeroconf server name collision")
217
self.remove()
218
elif state == avahi.SERVER_RUNNING:
219
self.add()
220
def activate(self):
221
"""Derived from the Avahi example code"""
222
if self.server is None:
223
self.server = dbus.Interface(
224
self.bus.get_object(avahi.DBUS_NAME,
225
avahi.DBUS_PATH_SERVER),
226
avahi.DBUS_INTERFACE_SERVER)
227
self.server.connect_to_signal(u"StateChanged",
228
self.server_state_changed)
229
self.server_state_changed(self.server.GetState())
30
31
# This variable is used to optionally bind to a specified interface.
32
# It is a global variable to fit in with the other variables from the
33
# Avahi server example code.
34
serviceInterface = avahi.IF_UNSPEC
35
# From the Avahi server example code:
36
serviceName = "Mandos"
37
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
38
servicePort = None # Not known at startup
39
serviceTXT = [] # TXT record for the service
40
domain = "" # Domain to publish on, default to .local
41
host = "" # Host to publish records for, default to localhost
42
group = None #our entry group
43
rename_count = 12 # Counter so we only rename after collisions a
44
# sensible number of times
45
# End of Avahi example code
230
46
231
47
232
48
class Client(object):
233
49
"""A representation of a client host served by this server.
234
235
50
Attributes:
236
name: string; from the config file, used in log messages and
237
D-Bus identifiers
51
name: string; from the config file, used in log messages
238
52
fingerprint: string (40 or 32 hexadecimal digits); used to
239
53
uniquely identify the client
240
secret: bytestring; sent verbatim (over TLS) to client
241
host: string; available for use by the checker command
242
created: datetime.datetime(); (UTC) object creation
243
last_enabled: datetime.datetime(); (UTC)
244
enabled: bool()
245
last_checked_ok: datetime.datetime(); (UTC) or None
246
timeout: datetime.timedelta(); How long from last_checked_ok
247
until this client is disabled
248
interval: datetime.timedelta(); How often to start a new checker
249
disable_hook: If set, called by disable() as disable_hook(self)
250
checker: subprocess.Popen(); a running checker process used
251
to see if the client lives.
252
'None' if no process is running.
54
secret: bytestring; sent verbatim (over TLS) to client
55
fqdn: string (FQDN); available for use by the checker command
56
created: datetime.datetime()
57
last_seen: datetime.datetime() or None if not yet seen
58
timeout: datetime.timedelta(); How long from last_seen until
59
this client is invalid
60
interval: datetime.timedelta(); How often to start a new checker
61
stop_hook: If set, called by stop() as stop_hook(self)
62
checker: subprocess.Popen(); a running checker process used
63
to see if the client lives.
64
Is None if no process is running.
253
65
checker_initiator_tag: a gobject event source tag, or None
254
disable_initiator_tag: - '' -
66
stop_initiator_tag: - '' -
255
67
checker_callback_tag: - '' -
256
68
checker_command: string; External command which is run to check if
257
client lives. %() expansions are done at
69
client lives. %()s expansions are done at
258
70
runtime with vars(self) as dict, so that for
259
71
instance %(name)s can be used in the command.
260
current_checker_command: string; current running checker_command
72
Private attibutes:
73
_timeout: Real variable for 'timeout'
74
_interval: Real variable for 'interval'
75
_timeout_milliseconds: Used by gobject.timeout_add()
76
_interval_milliseconds: - '' -
261
77
"""
262
263
@staticmethod
264
def _timedelta_to_milliseconds(td):
265
"Convert a datetime.timedelta() to milliseconds"
266
return ((td.days * 24 * 60 * 60 * 1000)
267
+ (td.seconds * 1000)
268
+ (td.microseconds // 1000))
269
270
def timeout_milliseconds(self):
271
"Return the 'timeout' attribute in milliseconds"
272
return self._timedelta_to_milliseconds(self.timeout)
273
274
def interval_milliseconds(self):
275
"Return the 'interval' attribute in milliseconds"
276
return self._timedelta_to_milliseconds(self.interval)
277
278
def __init__(self, name = None, disable_hook=None, config=None):
279
"""Note: the 'checker' key in 'config' sets the
280
'checker_command' attribute and *not* the 'checker'
281
attribute."""
78
def _set_timeout(self, timeout):
79
"Setter function for 'timeout' attribute"
80
self._timeout = timeout
81
self._timeout_milliseconds = ((self.timeout.days
82
* 24 * 60 * 60 * 1000)
83
+ (self.timeout.seconds * 1000)
84
+ (self.timeout.microseconds
85
// 1000))
86
timeout = property(lambda self: self._timeout,
87
_set_timeout)
88
del _set_timeout
89
def _set_interval(self, interval):
90
"Setter function for 'interval' attribute"
91
self._interval = interval
92
self._interval_milliseconds = ((self.interval.days
93
* 24 * 60 * 60 * 1000)
94
+ (self.interval.seconds
95
* 1000)
96
+ (self.interval.microseconds
97
// 1000))
98
interval = property(lambda self: self._interval,
99
_set_interval)
100
del _set_interval
101
def __init__(self, name=None, options=None, stop_hook=None,
102
fingerprint=None, secret=None, secfile=None, fqdn=None,
103
timeout=None, interval=-1, checker=None):
282
104
self.name = name
283
if config is None:
284
config = {}
285
logger.debug(u"Creating client %r", self.name)
286
# Uppercase and remove spaces from fingerprint for later
287
# comparison purposes with return value from the fingerprint()
288
# function
289
self.fingerprint = (config[u"fingerprint"].upper()
290
.replace(u" ", u""))
291
logger.debug(u" Fingerprint: %s", self.fingerprint)
292
if u"secret" in config:
293
self.secret = config[u"secret"].decode(u"base64")
294
elif u"secfile" in config:
295
with open(os.path.expanduser(os.path.expandvars
296
(config[u"secfile"])),
297
"rb") as secfile:
298
self.secret = secfile.read()
299
else:
300
raise TypeError(u"No secret or secfile for client %s"
301
% self.name)
302
self.host = config.get(u"host", u"")
303
self.created = datetime.datetime.utcnow()
304
self.enabled = False
305
self.last_enabled = None
306
self.last_checked_ok = None
307
self.timeout = string_to_delta(config[u"timeout"])
308
self.interval = string_to_delta(config[u"interval"])
309
self.disable_hook = disable_hook
105
# Uppercase and remove spaces from fingerprint
106
# for later comparison purposes with return value of
107
# the fingerprint() function
108
self.fingerprint = fingerprint.upper().replace(u" ", u"")
109
if secret:
110
self.secret = secret.decode(u"base64")
111
elif secfile:
112
sf = open(secfile)
113
self.secret = sf.read()
114
sf.close()
115
else:
116
raise RuntimeError(u"No secret or secfile for client %s"
117
% self.name)
118
self.fqdn = fqdn # string
119
self.created = datetime.datetime.now()
120
self.last_seen = None
121
if timeout is None:
122
timeout = options.timeout
123
self.timeout = timeout
124
if interval == -1:
125
interval = options.interval
126
else:
127
interval = string_to_delta(interval)
128
self.interval = interval
129
self.stop_hook = stop_hook
310
130
self.checker = None
311
131
self.checker_initiator_tag = None
312
self.disable_initiator_tag = None
132
self.stop_initiator_tag = None
313
133
self.checker_callback_tag = None
314
self.checker_command = config[u"checker"]
315
self.current_checker_command = None
316
self.last_connect = None
317
318
def enable(self):
319
"""Start this client's checker and timeout hooks"""
320
if getattr(self, u"enabled", False):
321
# Already enabled
322
return
323
self.last_enabled = datetime.datetime.utcnow()
134
self.check_command = checker
135
def start(self):
136
"""Start this clients checker and timeout hooks"""
324
137
# Schedule a new checker to be started an 'interval' from now,
325
138
# and every interval from then on.
326
self.checker_initiator_tag = (gobject.timeout_add
327
(self.interval_milliseconds(),
328
self.start_checker))
329
# Schedule a disable() when 'timeout' has passed
330
self.disable_initiator_tag = (gobject.timeout_add
331
(self.timeout_milliseconds(),
332
self.disable))
333
self.enabled = True
139
self.checker_initiator_tag = gobject.timeout_add\
140
(self._interval_milliseconds,
141
self.start_checker)
334
142
# Also start a new checker *right now*.
335
143
self.start_checker()
336
337
def disable(self, quiet=True):
338
"""Disable this client."""
339
if not getattr(self, "enabled", False):
340
return False
341
if not quiet:
342
logger.info(u"Disabling client %s", self.name)
343
if getattr(self, u"disable_initiator_tag", False):
344
gobject.source_remove(self.disable_initiator_tag)
345
self.disable_initiator_tag = None
346
if getattr(self, u"checker_initiator_tag", False):
144
# Schedule a stop() when 'timeout' has passed
145
self.stop_initiator_tag = gobject.timeout_add\
146
(self._timeout_milliseconds,
147
self.stop)
148
def stop(self):
149
"""Stop this client.
150
The possibility that this client might be restarted is left
151
open, but not currently used."""
152
if debug:
153
sys.stderr.write(u"Stopping client %s\n" % self.name)
154
self.secret = None
155
if self.stop_initiator_tag:
156
gobject.source_remove(self.stop_initiator_tag)
157
self.stop_initiator_tag = None
158
if self.checker_initiator_tag:
347
159
gobject.source_remove(self.checker_initiator_tag)
348
160
self.checker_initiator_tag = None
349
161
self.stop_checker()
350
if self.disable_hook:
351
self.disable_hook(self)
352
self.enabled = False
162
if self.stop_hook:
163
self.stop_hook(self)
353
164
# Do not run this again if called by a gobject.timeout_add
354
165
return False
355
356
166
def __del__(self):
357
self.disable_hook = None
358
self.disable()
359
360
def checker_callback(self, pid, condition, command):
167
# Some code duplication here and in stop()
168
if hasattr(self, "stop_initiator_tag") \
169
and self.stop_initiator_tag:
170
gobject.source_remove(self.stop_initiator_tag)
171
self.stop_initiator_tag = None
172
if hasattr(self, "checker_initiator_tag") \
173
and self.checker_initiator_tag:
174
gobject.source_remove(self.checker_initiator_tag)
175
self.checker_initiator_tag = None
176
self.stop_checker()
177
def checker_callback(self, pid, condition):
361
178
"""The checker has completed, so take appropriate actions."""
179
now = datetime.datetime.now()
180
if os.WIFEXITED(condition) \
181
and (os.WEXITSTATUS(condition) == 0):
182
if debug:
183
sys.stderr.write(u"Checker for %(name)s succeeded\n"
184
% vars(self))
185
self.last_seen = now
186
gobject.source_remove(self.stop_initiator_tag)
187
self.stop_initiator_tag = gobject.timeout_add\
188
(self._timeout_milliseconds,
189
self.stop)
190
elif debug:
191
if not os.WIFEXITED(condition):
192
sys.stderr.write(u"Checker for %(name)s crashed?\n"
193
% vars(self))
194
else:
195
sys.stderr.write(u"Checker for %(name)s failed\n"
196
% vars(self))
197
self.checker = None
362
198
self.checker_callback_tag = None
363
self.checker = None
364
if os.WIFEXITED(condition):
365
exitstatus = os.WEXITSTATUS(condition)
366
if exitstatus == 0:
367
logger.info(u"Checker for %(name)s succeeded",
368
vars(self))
369
self.checked_ok()
370
else:
371
logger.info(u"Checker for %(name)s failed",
372
vars(self))
373
else:
374
logger.warning(u"Checker for %(name)s crashed?",
375
vars(self))
376
377
def checked_ok(self):
378
"""Bump up the timeout for this client.
379
380
This should only be called when the client has been seen,
381
alive and well.
382
"""
383
self.last_checked_ok = datetime.datetime.utcnow()
384
gobject.source_remove(self.disable_initiator_tag)
385
self.disable_initiator_tag = (gobject.timeout_add
386
(self.timeout_milliseconds(),
387
self.disable))
388
389
199
def start_checker(self):
390
200
"""Start a new checker subprocess if one is not running.
391
392
201
If a checker already exists, leave it running and do
393
202
nothing."""
394
# The reason for not killing a running checker is that if we
395
# did that, then if a checker (for some reason) started
396
# running slowly and taking more than 'interval' time, the
397
# client would inevitably timeout, since no checker would get
398
# a chance to run to completion. If we instead leave running
399
# checkers alone, the checker would have to take more time
400
# than 'timeout' for the client to be disabled, which is as it
401
# should be.
402
403
# If a checker exists, make sure it is not a zombie
404
try:
405
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
406
except (AttributeError, OSError), error:
407
if (isinstance(error, OSError)
408
and error.errno != errno.ECHILD):
409
raise error
410
else:
411
if pid:
412
logger.warning(u"Checker was a zombie")
413
gobject.source_remove(self.checker_callback_tag)
414
self.checker_callback(pid, status,
415
self.current_checker_command)
416
# Start a new checker if needed
417
203
if self.checker is None:
204
if debug:
205
sys.stderr.write(u"Starting checker for %s\n"
206
% self.name)
418
207
try:
419
# In case checker_command has exactly one % operator
420
command = self.checker_command % self.host
208
command = self.check_command % self.fqdn
421
209
except TypeError:
422
# Escape attributes for the shell
423
escaped_attrs = dict((key,
424
re.escape(unicode(str(val),
425
errors=
426
u'replace')))
210
escaped_attrs = dict((key, re.escape(str(val)))
427
211
for key, val in
428
212
vars(self).iteritems())
429
try:
430
command = self.checker_command % escaped_attrs
431
except TypeError, error:
432
logger.error(u'Could not format string "%s":'
433
u' %s', self.checker_command, error)
434
return True # Try again later
435
self.current_checker_command = command
213
command = self.check_command % escaped_attrs
436
214
try:
437
logger.info(u"Starting checker %r for %s",
438
command, self.name)
439
# We don't need to redirect stdout and stderr, since
440
# in normal mode, that is already done by daemon(),
441
# and in debug mode we don't want to. (Stdin is
442
# always replaced by /dev/null.)
443
self.checker = subprocess.Popen(command,
444
close_fds=True,
445
shell=True, cwd=u"/")
446
self.checker_callback_tag = (gobject.child_watch_add
447
(self.checker.pid,
448
self.checker_callback,
449
data=command))
450
# The checker may have completed before the gobject
451
# watch was added. Check for this.
452
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
453
if pid:
454
gobject.source_remove(self.checker_callback_tag)
455
self.checker_callback(pid, status, command)
456
except OSError, error:
457
logger.error(u"Failed to start subprocess: %s",
458
error)
215
self.checker = subprocess.\
216
Popen(command,
217
stdout=subprocess.PIPE,
218
close_fds=True, shell=True,
219
cwd="/")
220
self.checker_callback_tag = gobject.\
221
child_watch_add(self.checker.pid,
222
self.\
223
checker_callback)
224
except subprocess.OSError, error:
225
sys.stderr.write(u"Failed to start subprocess: %s\n"
226
% error)
459
227
# Re-run this periodically if run by gobject.timeout_add
460
228
return True
461
462
229
def stop_checker(self):
463
230
"""Force the checker process, if any, to stop."""
464
if self.checker_callback_tag:
465
gobject.source_remove(self.checker_callback_tag)
466
self.checker_callback_tag = None
467
if getattr(self, u"checker", None) is None:
231
if not hasattr(self, "checker") or self.checker is None:
468
232
return
469
logger.debug(u"Stopping checker for %(name)s", vars(self))
470
try:
471
os.kill(self.checker.pid, signal.SIGTERM)
472
#time.sleep(0.5)
473
#if self.checker.poll() is None:
474
# os.kill(self.checker.pid, signal.SIGKILL)
475
except OSError, error:
476
if error.errno != errno.ESRCH: # No such process
477
raise
478
self.checker = None
479
480
481
def dbus_service_property(dbus_interface, signature=u"v",
482
access=u"readwrite", byte_arrays=False):
483
"""Decorators for marking methods of a DBusObjectWithProperties to
484
become properties on the D-Bus.
485
486
The decorated method will be called with no arguments by "Get"
487
and with one argument by "Set".
488
489
The parameters, where they are supported, are the same as
490
dbus.service.method, except there is only "signature", since the
491
type from Get() and the type sent to Set() is the same.
492
"""
493
# Encoding deeply encoded byte arrays is not supported yet by the
494
# "Set" method, so we fail early here:
495
if byte_arrays and signature != u"ay":
496
raise ValueError(u"Byte arrays not supported for non-'ay'"
497
u" signature %r" % signature)
498
def decorator(func):
499
func._dbus_is_property = True
500
func._dbus_interface = dbus_interface
501
func._dbus_signature = signature
502
func._dbus_access = access
503
func._dbus_name = func.__name__
504
if func._dbus_name.endswith(u"_dbus_property"):
505
func._dbus_name = func._dbus_name[:-14]
506
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
507
return func
508
return decorator
509
510
511
class DBusPropertyException(dbus.exceptions.DBusException):
512
"""A base class for D-Bus property-related exceptions
513
"""
514
def __unicode__(self):
515
return unicode(str(self))
516
517
518
class DBusPropertyAccessException(DBusPropertyException):
519
"""A property's access permissions disallows an operation.
520
"""
521
pass
522
523
524
class DBusPropertyNotFound(DBusPropertyException):
525
"""An attempt was made to access a non-existing property.
526
"""
527
pass
528
529
530
class DBusObjectWithProperties(dbus.service.Object):
531
"""A D-Bus object with properties.
532
533
Classes inheriting from this can use the dbus_service_property
534
decorator to expose methods as D-Bus properties. It exposes the
535
standard Get(), Set(), and GetAll() methods on the D-Bus.
536
"""
537
538
@staticmethod
539
def _is_dbus_property(obj):
540
return getattr(obj, u"_dbus_is_property", False)
541
542
def _get_all_dbus_properties(self):
543
"""Returns a generator of (name, attribute) pairs
544
"""
545
return ((prop._dbus_name, prop)
546
for name, prop in
547
inspect.getmembers(self, self._is_dbus_property))
548
549
def _get_dbus_property(self, interface_name, property_name):
550
"""Returns a bound method if one exists which is a D-Bus
551
property with the specified name and interface.
552
"""
553
for name in (property_name,
554
property_name + u"_dbus_property"):
555
prop = getattr(self, name, None)
556
if (prop is None
557
or not self._is_dbus_property(prop)
558
or prop._dbus_name != property_name
559
or (interface_name and prop._dbus_interface
560
and interface_name != prop._dbus_interface)):
561
continue
562
return prop
563
# No such property
564
raise DBusPropertyNotFound(self.dbus_object_path + u":"
565
+ interface_name + u"."
566
+ property_name)
567
568
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
569
out_signature=u"v")
570
def Get(self, interface_name, property_name):
571
"""Standard D-Bus property Get() method, see D-Bus standard.
572
"""
573
prop = self._get_dbus_property(interface_name, property_name)
574
if prop._dbus_access == u"write":
575
raise DBusPropertyAccessException(property_name)
576
value = prop()
577
if not hasattr(value, u"variant_level"):
578
return value
579
return type(value)(value, variant_level=value.variant_level+1)
580
581
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
582
def Set(self, interface_name, property_name, value):
583
"""Standard D-Bus property Set() method, see D-Bus standard.
584
"""
585
prop = self._get_dbus_property(interface_name, property_name)
586
if prop._dbus_access == u"read":
587
raise DBusPropertyAccessException(property_name)
588
if prop._dbus_get_args_options[u"byte_arrays"]:
589
# The byte_arrays option is not supported yet on
590
# signatures other than "ay".
591
if prop._dbus_signature != u"ay":
592
raise ValueError
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):
233
gobject.source_remove(self.checker_callback_tag)
729
234
self.checker_callback_tag = None
235
os.kill(self.checker.pid, signal.SIGTERM)
236
if self.checker.poll() is None:
237
os.kill(self.checker.pid, signal.SIGKILL)
730
238
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 & properties
785
_interface = u"se.bsnet.fukt.Mandos.Client"
786
787
## Signals
788
789
# CheckerCompleted - signal
790
@dbus.service.signal(_interface, signature=u"nxs")
791
def CheckerCompleted(self, exitcode, waitstatus, command):
792
"D-Bus signal"
793
pass
794
795
# CheckerStarted - signal
796
@dbus.service.signal(_interface, signature=u"s")
797
def CheckerStarted(self, command):
798
"D-Bus signal"
799
pass
800
801
# PropertyChanged - signal
802
@dbus.service.signal(_interface, signature=u"sv")
803
def PropertyChanged(self, property, value):
804
"D-Bus signal"
805
pass
806
807
# GotSecret - signal
808
@dbus.service.signal(_interface)
809
def GotSecret(self):
810
"D-Bus signal"
811
pass
812
813
# Rejected - signal
814
@dbus.service.signal(_interface)
815
def Rejected(self):
816
"D-Bus signal"
817
pass
818
819
## Methods
820
821
# CheckedOK - method
822
@dbus.service.method(_interface)
823
def CheckedOK(self):
824
return self.checked_ok()
825
826
# Enable - method
827
@dbus.service.method(_interface)
828
def Enable(self):
829
"D-Bus method"
830
self.enable()
831
832
# StartChecker - method
833
@dbus.service.method(_interface)
834
def StartChecker(self):
835
"D-Bus method"
836
self.start_checker()
837
838
# Disable - method
839
@dbus.service.method(_interface)
840
def Disable(self):
841
"D-Bus method"
842
self.disable()
843
844
# StopChecker - method
845
@dbus.service.method(_interface)
846
def StopChecker(self):
847
self.stop_checker()
848
849
## Properties
850
851
# name - property
852
@dbus_service_property(_interface, signature=u"s", access=u"read")
853
def name_dbus_property(self):
854
return dbus.String(self.name)
855
856
# fingerprint - property
857
@dbus_service_property(_interface, signature=u"s", access=u"read")
858
def fingerprint_dbus_property(self):
859
return dbus.String(self.fingerprint)
860
861
# host - property
862
@dbus_service_property(_interface, signature=u"s",
863
access=u"readwrite")
864
def host_dbus_property(self, value=None):
865
if value is None: # get
866
return dbus.String(self.host)
867
self.host = value
868
# Emit D-Bus signal
869
self.PropertyChanged(dbus.String(u"host"),
870
dbus.String(value, variant_level=1))
871
872
# created - property
873
@dbus_service_property(_interface, signature=u"s", access=u"read")
874
def created_dbus_property(self):
875
return dbus.String(self._datetime_to_dbus(self.created))
876
877
# last_enabled - property
878
@dbus_service_property(_interface, signature=u"s", access=u"read")
879
def last_enabled_dbus_property(self):
880
if self.last_enabled is None:
881
return dbus.String(u"")
882
return dbus.String(self._datetime_to_dbus(self.last_enabled))
883
884
# enabled - property
885
@dbus_service_property(_interface, signature=u"b",
886
access=u"readwrite")
887
def enabled_dbus_property(self, value=None):
888
if value is None: # get
889
return dbus.Boolean(self.enabled)
890
if value:
891
self.enable()
892
else:
893
self.disable()
894
895
# last_checked_ok - property
896
@dbus_service_property(_interface, signature=u"s",
897
access=u"readwrite")
898
def last_checked_ok_dbus_property(self, value=None):
899
if value is not None:
900
self.checked_ok()
901
return
902
if self.last_checked_ok is None:
903
return dbus.String(u"")
904
return dbus.String(self._datetime_to_dbus(self
905
.last_checked_ok))
906
907
# timeout - property
908
@dbus_service_property(_interface, signature=u"t",
909
access=u"readwrite")
910
def timeout_dbus_property(self, value=None):
911
if value is None: # get
912
return dbus.UInt64(self.timeout_milliseconds())
913
self.timeout = datetime.timedelta(0, 0, 0, value)
914
# Emit D-Bus signal
915
self.PropertyChanged(dbus.String(u"timeout"),
916
dbus.UInt64(value, variant_level=1))
917
if getattr(self, u"disable_initiator_tag", None) is None:
918
return
919
# Reschedule timeout
920
gobject.source_remove(self.disable_initiator_tag)
921
self.disable_initiator_tag = None
922
time_to_die = (self.
923
_timedelta_to_milliseconds((self
924
.last_checked_ok
925
+ self.timeout)
926
- datetime.datetime
927
.utcnow()))
928
if time_to_die <= 0:
929
# The timeout has passed
930
self.disable()
931
else:
932
self.disable_initiator_tag = (gobject.timeout_add
933
(time_to_die, self.disable))
934
935
# interval - property
936
@dbus_service_property(_interface, signature=u"t",
937
access=u"readwrite")
938
def interval_dbus_property(self, value=None):
939
if value is None: # get
940
return dbus.UInt64(self.interval_milliseconds())
941
self.interval = datetime.timedelta(0, 0, 0, value)
942
# Emit D-Bus signal
943
self.PropertyChanged(dbus.String(u"interval"),
944
dbus.UInt64(value, variant_level=1))
945
if getattr(self, u"checker_initiator_tag", None) is None:
946
return
947
# Reschedule checker run
948
gobject.source_remove(self.checker_initiator_tag)
949
self.checker_initiator_tag = (gobject.timeout_add
950
(value, self.start_checker))
951
self.start_checker() # Start one now, too
952
953
# checker - property
954
@dbus_service_property(_interface, signature=u"s",
955
access=u"readwrite")
956
def checker_dbus_property(self, value=None):
957
if value is None: # get
958
return dbus.String(self.checker_command)
959
self.checker_command = value
960
# Emit D-Bus signal
961
self.PropertyChanged(dbus.String(u"checker"),
962
dbus.String(self.checker_command,
963
variant_level=1))
964
965
# checker_running - property
966
@dbus_service_property(_interface, signature=u"b",
967
access=u"readwrite")
968
def checker_running_dbus_property(self, value=None):
969
if value is None: # get
970
return dbus.Boolean(self.checker is not None)
971
if value:
972
self.start_checker()
973
else:
974
self.stop_checker()
975
976
# object_path - property
977
@dbus_service_property(_interface, signature=u"o", access=u"read")
978
def object_path_dbus_property(self):
979
return self.dbus_object_path # is already a dbus.ObjectPath
980
981
# secret = property
982
@dbus_service_property(_interface, signature=u"ay",
983
access=u"write", byte_arrays=True)
984
def secret_dbus_property(self, value):
985
self.secret = str(value)
986
987
del _interface
988
989
990
class ClientHandler(socketserver.BaseRequestHandler, object):
991
"""A class to handle client connections.
992
993
Instantiated once for each connection to handle it.
239
def still_valid(self, now=None):
240
"""Has the timeout not yet passed for this client?"""
241
if now is None:
242
now = datetime.datetime.now()
243
if self.last_seen is None:
244
return now < (self.created + self.timeout)
245
else:
246
return now < (self.last_seen + self.timeout)
247
248
249
def peer_certificate(session):
250
# If not an OpenPGP certificate...
251
if gnutls.library.functions.gnutls_certificate_type_get\
252
(session._c_object) \
253
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
254
# ...do the normal thing
255
return session.peer_certificate
256
list_size = ctypes.c_uint()
257
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
258
(session._c_object, ctypes.byref(list_size))
259
if list_size.value == 0:
260
return None
261
cert = cert_list[0]
262
return ctypes.string_at(cert.data, cert.size)
263
264
265
def fingerprint(openpgp):
266
# New empty GnuTLS certificate
267
crt = gnutls.library.types.gnutls_openpgp_crt_t()
268
gnutls.library.functions.gnutls_openpgp_crt_init\
269
(ctypes.byref(crt))
270
# New GnuTLS "datum" with the OpenPGP public key
271
datum = gnutls.library.types.gnutls_datum_t\
272
(ctypes.cast(ctypes.c_char_p(openpgp),
273
ctypes.POINTER(ctypes.c_ubyte)),
274
ctypes.c_uint(len(openpgp)))
275
# Import the OpenPGP public key into the certificate
276
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
277
(crt,
278
ctypes.byref(datum),
279
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
280
# New buffer for the fingerprint
281
buffer = ctypes.create_string_buffer(20)
282
buffer_length = ctypes.c_size_t()
283
# Get the fingerprint from the certificate into the buffer
284
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
285
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
286
# Deinit the certificate
287
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
288
# Convert the buffer to a Python bytestring
289
fpr = ctypes.string_at(buffer, buffer_length.value)
290
# Convert the bytestring to hexadecimal notation
291
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
292
return hex_fpr
293
294
295
class tcp_handler(SocketServer.BaseRequestHandler, object):
296
"""A TCP request handler class.
297
Instantiated by IPv6_TCPServer for each request to handle it.
994
298
Note: This will run in its own forked process."""
995
299
996
300
def handle(self):
997
logger.info(u"TCP connection from: %s",
998
unicode(self.client_address))
999
logger.debug(u"IPC Pipe FD: %d",
1000
self.server.child_pipe[1].fileno())
1001
# Open IPC pipe to parent process
1002
with contextlib.nested(self.server.child_pipe[1],
1003
self.server.parent_pipe[0]
1004
) as (ipc, ipc_return):
1005
session = (gnutls.connection
1006
.ClientSession(self.request,
1007
gnutls.connection
1008
.X509Credentials()))
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
# Start communication using the Mandos protocol
1028
# Get protocol number
1029
line = self.request.makefile().readline()
1030
logger.debug(u"Protocol version: %r", line)
1031
try:
1032
if int(line.strip().split()[0]) > 1:
1033
raise RuntimeError
1034
except (ValueError, IndexError, RuntimeError), error:
1035
logger.error(u"Unknown protocol version: %s", error)
1036
return
1037
1038
# Start GnuTLS connection
1039
try:
1040
session.handshake()
1041
except gnutls.errors.GNUTLSError, error:
1042
logger.warning(u"Handshake failed: %s", error)
1043
# Do not run session.bye() here: the session is not
1044
# established. Just abandon the request.
1045
return
1046
logger.debug(u"Handshake succeeded")
1047
try:
1048
try:
1049
fpr = self.fingerprint(self.peer_certificate
1050
(session))
1051
except (TypeError, gnutls.errors.GNUTLSError), error:
1052
logger.warning(u"Bad certificate: %s", error)
1053
return
1054
logger.debug(u"Fingerprint: %s", fpr)
1055
1056
for c in self.server.clients:
1057
if c.fingerprint == fpr:
1058
client = c
1059
break
301
if debug:
302
sys.stderr.write(u"TCP request came\n")
303
sys.stderr.write(u"Request: %s\n" % self.request)
304
sys.stderr.write(u"Client Address: %s\n"
305
% unicode(self.client_address))
306
sys.stderr.write(u"Server: %s\n" % self.server)
307
session = gnutls.connection.ClientSession(self.request,
308
gnutls.connection.\
309
X509Credentials())
310
311
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
312
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
313
# "+DHE-DSS"))
314
priority = "SECURE256"
315
316
gnutls.library.functions.gnutls_priority_set_direct\
317
(session._c_object, priority, None);
318
319
try:
320
session.handshake()
321
except gnutls.errors.GNUTLSError, error:
322
if debug:
323
sys.stderr.write(u"Handshake failed: %s\n" % error)
324
# Do not run session.bye() here: the session is not
325
# established. Just abandon the request.
326
return
327
try:
328
fpr = fingerprint(peer_certificate(session))
329
except (TypeError, gnutls.errors.GNUTLSError), error:
330
if debug:
331
sys.stderr.write(u"Bad certificate: %s\n" % error)
332
session.bye()
333
return
334
if debug:
335
sys.stderr.write(u"Fingerprint: %s\n" % fpr)
336
client = None
337
for c in clients:
338
if c.fingerprint == fpr:
339
client = c
340
break
341
# Have to check if client.still_valid(), since it is possible
342
# that the client timed out while establishing the GnuTLS
343
# session.
344
if (not client) or (not client.still_valid()):
345
if debug:
346
if client:
347
sys.stderr.write(u"Client %(name)s is invalid\n"
348
% vars(client))
1060
349
else:
1061
ipc.write(u"NOTFOUND %s %s\n"
1062
% (fpr, unicode(self.client_address)))
1063
return
1064
1065
class ClientProxy(object):
1066
"""Client proxy object. Not for calling methods."""
1067
def __init__(self, client):
1068
self.client = client
1069
def __getattr__(self, name):
1070
if name.startswith("ipc_"):
1071
def tempfunc():
1072
ipc.write("%s %s\n" % (name[4:].upper(),
1073
self.client.name))
1074
return tempfunc
1075
if not hasattr(self.client, name):
1076
raise AttributeError
1077
ipc.write(u"GETATTR %s %s\n"
1078
% (name, self.client.fingerprint))
1079
return pickle.load(ipc_return)
1080
clientproxy = ClientProxy(client)
1081
# Have to check if client.enabled, since it is
1082
# possible that the client was disabled since the
1083
# GnuTLS session was established.
1084
if not clientproxy.enabled:
1085
clientproxy.ipc_disabled()
1086
return
1087
1088
clientproxy.ipc_sending()
1089
sent_size = 0
1090
while sent_size < len(client.secret):
1091
sent = session.send(client.secret[sent_size:])
1092
logger.debug(u"Sent: %d, remaining: %d",
1093
sent, len(client.secret)
1094
- (sent_size + sent))
1095
sent_size += sent
1096
finally:
1097
session.bye()
1098
1099
@staticmethod
1100
def peer_certificate(session):
1101
"Return the peer's OpenPGP certificate as a bytestring"
1102
# If not an OpenPGP certificate...
1103
if (gnutls.library.functions
1104
.gnutls_certificate_type_get(session._c_object)
1105
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1106
# ...do the normal thing
1107
return session.peer_certificate
1108
list_size = ctypes.c_uint(1)
1109
cert_list = (gnutls.library.functions
1110
.gnutls_certificate_get_peers
1111
(session._c_object, ctypes.byref(list_size)))
1112
if not bool(cert_list) and list_size.value != 0:
1113
raise gnutls.errors.GNUTLSError(u"error getting peer"
1114
u" certificate")
1115
if list_size.value == 0:
1116
return None
1117
cert = cert_list[0]
1118
return ctypes.string_at(cert.data, cert.size)
1119
1120
@staticmethod
1121
def fingerprint(openpgp):
1122
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1123
# New GnuTLS "datum" with the OpenPGP public key
1124
datum = (gnutls.library.types
1125
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1126
ctypes.POINTER
1127
(ctypes.c_ubyte)),
1128
ctypes.c_uint(len(openpgp))))
1129
# New empty GnuTLS certificate
1130
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1131
(gnutls.library.functions
1132
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1133
# Import the OpenPGP public key into the certificate
1134
(gnutls.library.functions
1135
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1136
gnutls.library.constants
1137
.GNUTLS_OPENPGP_FMT_RAW))
1138
# Verify the self signature in the key
1139
crtverify = ctypes.c_uint()
1140
(gnutls.library.functions
1141
.gnutls_openpgp_crt_verify_self(crt, 0,
1142
ctypes.byref(crtverify)))
1143
if crtverify.value != 0:
1144
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1145
raise (gnutls.errors.CertificateSecurityError
1146
(u"Verify failed"))
1147
# New buffer for the fingerprint
1148
buf = ctypes.create_string_buffer(20)
1149
buf_len = ctypes.c_size_t()
1150
# Get the fingerprint from the certificate into the buffer
1151
(gnutls.library.functions
1152
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1153
ctypes.byref(buf_len)))
1154
# Deinit the certificate
1155
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1156
# Convert the buffer to a Python bytestring
1157
fpr = ctypes.string_at(buf, buf_len.value)
1158
# Convert the bytestring to hexadecimal notation
1159
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1160
return hex_fpr
1161
1162
1163
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1164
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1165
def process_request(self, request, client_address):
1166
"""Overrides and wraps the original process_request().
1167
1168
This function creates a new pipe in self.pipe
1169
"""
1170
# Child writes to child_pipe
1171
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1172
# Parent writes to parent_pipe
1173
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1174
super(ForkingMixInWithPipes,
1175
self).process_request(request, client_address)
1176
# Close unused ends for parent
1177
self.parent_pipe[0].close() # close read end
1178
self.child_pipe[1].close() # close write end
1179
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1180
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1181
"""Dummy function; override as necessary"""
1182
child_pipe_fd.close()
1183
parent_pipe_fd.close()
1184
1185
1186
class IPv6_TCPServer(ForkingMixInWithPipes,
1187
socketserver.TCPServer, object):
1188
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1189
350
sys.stderr.write(u"Client not found for "
351
u"fingerprint: %s\n" % fpr)
352
session.bye()
353
return
354
sent_size = 0
355
while sent_size < len(client.secret):
356
sent = session.send(client.secret[sent_size:])
357
if debug:
358
sys.stderr.write(u"Sent: %d, remaining: %d\n"
359
% (sent, len(client.secret)
360
- (sent_size + sent)))
361
sent_size += sent
362
session.bye()
363
364
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1190
367
Attributes:
1191
enabled: Boolean; whether this server is activated yet
1192
interface: None or a network interface name (string)
1193
use_ipv6: Boolean; to use IPv6 or not
368
options: Command line options
369
clients: Set() of Client objects
1194
370
"""
1195
def __init__(self, server_address, RequestHandlerClass,
1196
interface=None, use_ipv6=True):
1197
self.interface = interface
1198
if use_ipv6:
1199
self.address_family = socket.AF_INET6
1200
socketserver.TCPServer.__init__(self, server_address,
1201
RequestHandlerClass)
371
address_family = socket.AF_INET6
372
def __init__(self, *args, **kwargs):
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
376
if "clients" in kwargs:
377
self.clients = kwargs["clients"]
378
del kwargs["clients"]
379
return super(type(self), self).__init__(*args, **kwargs)
1202
380
def server_bind(self):
1203
381
"""This overrides the normal server_bind() function
1204
382
to bind to an interface if one was specified, and also NOT to
1205
383
bind to an address or port if they were not specified."""
1206
if self.interface is not None:
1207
if SO_BINDTODEVICE is None:
1208
logger.error(u"SO_BINDTODEVICE does not exist;"
1209
u" cannot bind to interface %s",
1210
self.interface)
1211
else:
1212
try:
1213
self.socket.setsockopt(socket.SOL_SOCKET,
1214
SO_BINDTODEVICE,
1215
str(self.interface
1216
+ u'\0'))
1217
except socket.error, error:
1218
if error[0] == errno.EPERM:
1219
logger.error(u"No permission to"
1220
u" bind to interface %s",
1221
self.interface)
1222
elif error[0] == errno.ENOPROTOOPT:
1223
logger.error(u"SO_BINDTODEVICE not available;"
1224
u" cannot bind to interface %s",
1225
self.interface)
1226
else:
1227
raise
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
388
try:
389
self.socket.setsockopt(socket.SOL_SOCKET,
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
392
except socket.error, error:
393
if error[0] == errno.EPERM:
394
sys.stderr.write(u"Warning: No permission to" \
395
u" bind to interface %s\n"
396
% self.options.interface)
397
else:
398
raise error
1228
399
# Only bind(2) the socket if we really need to.
1229
400
if self.server_address[0] or self.server_address[1]:
1230
401
if not self.server_address[0]:
1231
if self.address_family == socket.AF_INET6:
1232
any_address = u"::" # in6addr_any
1233
else:
1234
any_address = socket.INADDR_ANY
1235
self.server_address = (any_address,
402
in6addr_any = "::"
403
self.server_address = (in6addr_any,
1236
404
self.server_address[1])
1237
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
1238
406
self.server_address = (self.server_address[0],
1239
407
0)
1240
# if self.interface:
1241
# self.server_address = (self.server_address[0],
1242
# 0, # port
1243
# 0, # flowinfo
1244
# if_nametoindex
1245
# (self.interface))
1246
return socketserver.TCPServer.server_bind(self)
1247
1248
1249
class MandosServer(IPv6_TCPServer):
1250
"""Mandos server.
1251
1252
Attributes:
1253
clients: set of Client objects
1254
gnutls_priority GnuTLS priority string
1255
use_dbus: Boolean; to emit D-Bus signals or not
1256
1257
Assumes a gobject.MainLoop event loop.
1258
"""
1259
def __init__(self, server_address, RequestHandlerClass,
1260
interface=None, use_ipv6=True, clients=None,
1261
gnutls_priority=None, use_dbus=True):
1262
self.enabled = False
1263
self.clients = clients
1264
if self.clients is None:
1265
self.clients = set()
1266
self.use_dbus = use_dbus
1267
self.gnutls_priority = gnutls_priority
1268
IPv6_TCPServer.__init__(self, server_address,
1269
RequestHandlerClass,
1270
interface = interface,
1271
use_ipv6 = use_ipv6)
1272
def server_activate(self):
1273
if self.enabled:
1274
return socketserver.TCPServer.server_activate(self)
1275
def enable(self):
1276
self.enabled = True
1277
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1278
# Call "handle_ipc" for both data and EOF events
1279
gobject.io_add_watch(child_pipe_fd.fileno(),
1280
gobject.IO_IN | gobject.IO_HUP,
1281
functools.partial(self.handle_ipc,
1282
reply = parent_pipe_fd,
1283
sender= child_pipe_fd))
1284
def handle_ipc(self, source, condition, reply=None, sender=None):
1285
condition_names = {
1286
gobject.IO_IN: u"IN", # There is data to read.
1287
gobject.IO_OUT: u"OUT", # Data can be written (without
1288
# blocking).
1289
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1290
gobject.IO_ERR: u"ERR", # Error condition.
1291
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1292
# broken, usually for pipes and
1293
# sockets).
1294
}
1295
conditions_string = ' | '.join(name
1296
for cond, name in
1297
condition_names.iteritems()
1298
if cond & condition)
1299
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1300
conditions_string)
1301
1302
# Read a line from the file object
1303
cmdline = sender.readline()
1304
if not cmdline: # Empty line means end of file
1305
# close the IPC pipes
1306
sender.close()
1307
reply.close()
1308
1309
# Stop calling this function
1310
return False
1311
1312
logger.debug(u"IPC command: %r", cmdline)
1313
1314
# Parse and act on command
1315
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1316
1317
if cmd == u"NOTFOUND":
1318
fpr, address = args.split(None, 1)
1319
logger.warning(u"Client not found for fingerprint: %s, ad"
1320
u"dress: %s", fpr, address)
1321
if self.use_dbus:
1322
# Emit D-Bus signal
1323
mandos_dbus_service.ClientNotFound(fpr, address)
1324
elif cmd == u"DISABLED":
1325
for client in self.clients:
1326
if client.name == args:
1327
logger.warning(u"Client %s is disabled", args)
1328
if self.use_dbus:
1329
# Emit D-Bus signal
1330
client.Rejected()
1331
break
1332
else:
1333
logger.error(u"Unknown client %s is disabled", args)
1334
elif cmd == u"SENDING":
1335
for client in self.clients:
1336
if client.name == args:
1337
logger.info(u"Sending secret to %s", client.name)
1338
client.checked_ok()
1339
if self.use_dbus:
1340
# Emit D-Bus signal
1341
client.GotSecret()
1342
break
1343
else:
1344
logger.error(u"Sending secret to unknown client %s",
1345
args)
1346
elif cmd == u"GETATTR":
1347
attr_name, fpr = args.split(None, 1)
1348
for client in self.clients:
1349
if client.fingerprint == fpr:
1350
attr_value = getattr(client, attr_name, None)
1351
logger.debug("IPC reply: %r", attr_value)
1352
pickle.dump(attr_value, reply)
1353
break
1354
else:
1355
logger.error(u"Client %s on address %s requesting "
1356
u"attribute %s not found", fpr, address,
1357
attr_name)
1358
pickle.dump(None, reply)
1359
else:
1360
logger.error(u"Unknown IPC command: %r", cmdline)
1361
1362
# Keep calling this function
1363
return True
408
return super(type(self), self).server_bind()
1364
409
1365
410
1366
411
def string_to_delta(interval):
1367
412
"""Parse a string and return a datetime.timedelta
1368
1369
>>> string_to_delta(u'7d')
413
414
>>> string_to_delta('7d')
1370
415
datetime.timedelta(7)
1371
>>> string_to_delta(u'60s')
416
>>> string_to_delta('60s')
1372
417
datetime.timedelta(0, 60)
1373
>>> string_to_delta(u'60m')
418
>>> string_to_delta('60m')
1374
419
datetime.timedelta(0, 3600)
1375
>>> string_to_delta(u'24h')
420
>>> string_to_delta('24h')
1376
421
datetime.timedelta(1)
1377
422
>>> string_to_delta(u'1w')
1378
423
datetime.timedelta(7)
1379
>>> string_to_delta(u'5m 30s')
1380
datetime.timedelta(0, 330)
1381
424
"""
1382
timevalue = datetime.timedelta(0)
1383
for s in interval.split():
1384
try:
1385
suffix = unicode(s[-1])
1386
value = int(s[:-1])
1387
if suffix == u"d":
1388
delta = datetime.timedelta(value)
1389
elif suffix == u"s":
1390
delta = datetime.timedelta(0, value)
1391
elif suffix == u"m":
1392
delta = datetime.timedelta(0, 0, 0, 0, value)
1393
elif suffix == u"h":
1394
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1395
elif suffix == u"w":
1396
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1397
else:
1398
raise ValueError(u"Unknown suffix %r" % suffix)
1399
except (ValueError, IndexError), e:
1400
raise ValueError(e.message)
1401
timevalue += delta
1402
return timevalue
425
try:
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
428
if suffix == u"d":
429
delta = datetime.timedelta(value)
430
elif suffix == u"s":
431
delta = datetime.timedelta(0, value)
432
elif suffix == u"m":
433
delta = datetime.timedelta(0, 0, 0, 0, value)
434
elif suffix == u"h":
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
436
elif suffix == u"w":
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
438
else:
439
raise ValueError
440
except (ValueError, IndexError):
441
raise ValueError
442
return delta
443
444
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
456
if debug:
457
sys.stderr.write(u"Adding service '%s' of type '%s' ...\n"
458
% (serviceName, serviceType))
459
460
group.AddService(
461
serviceInterface, # interface
462
avahi.PROTO_INET6, # protocol
463
dbus.UInt32(0), # flags
464
serviceName, serviceType,
465
domain, host,
466
dbus.UInt16(servicePort),
467
avahi.string_array_to_txt_array(serviceTXT))
468
group.Commit()
469
470
471
def remove_service():
472
"""From the Avahi server example code"""
473
global group
474
475
if not group is None:
476
group.Reset()
477
478
479
def server_state_changed(state):
480
"""From the Avahi server example code"""
481
if state == avahi.SERVER_COLLISION:
482
sys.stderr.write(u"WARNING: Server name collision\n")
483
remove_service()
484
elif state == avahi.SERVER_RUNNING:
485
add_service()
486
487
488
def entry_group_state_changed(state, error):
489
"""From the Avahi server example code"""
490
global serviceName, server, rename_count
491
492
if debug:
493
sys.stderr.write(u"state change: %i\n" % state)
494
495
if state == avahi.ENTRY_GROUP_ESTABLISHED:
496
if debug:
497
sys.stderr.write(u"Service established.\n")
498
elif state == avahi.ENTRY_GROUP_COLLISION:
499
500
rename_count = rename_count - 1
501
if rename_count > 0:
502
name = server.GetAlternativeServiceName(name)
503
sys.stderr.write(u"WARNING: Service name collision, "
504
u"changing name to '%s' ...\n" % name)
505
remove_service()
506
add_service()
507
508
else:
509
sys.stderr.write(u"ERROR: No suitable service name found "
510
u"after %i retries, exiting.\n"
511
% n_rename)
512
main_loop.quit()
513
elif state == avahi.ENTRY_GROUP_FAILURE:
514
sys.stderr.write(u"Error in group state changed %s\n"
515
% unicode(error))
516
main_loop.quit()
517
return
1403
518
1404
519
1405
520
def if_nametoindex(interface):
1406
"""Call the C function if_nametoindex(), or equivalent
1407
1408
Note: This function cannot accept a unicode string."""
1409
global if_nametoindex
521
"""Call the C function if_nametoindex()"""
1410
522
try:
1411
if_nametoindex = (ctypes.cdll.LoadLibrary
1412
(ctypes.util.find_library(u"c"))
1413
.if_nametoindex)
523
libc = ctypes.cdll.LoadLibrary("libc.so.6")
524
return libc.if_nametoindex(interface)
1414
525
except (OSError, AttributeError):
1415
logger.warning(u"Doing if_nametoindex the hard way")
1416
def if_nametoindex(interface):
1417
"Get an interface index the hard way, i.e. using fcntl()"
1418
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1419
with contextlib.closing(socket.socket()) as s:
1420
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1421
struct.pack(str(u"16s16x"),
1422
interface))
1423
interface_index = struct.unpack(str(u"I"),
1424
ifreq[16:20])[0]
1425
return interface_index
1426
return if_nametoindex(interface)
1427
1428
1429
def daemon(nochdir = False, noclose = False):
1430
"""See daemon(3). Standard BSD Unix function.
1431
1432
This should really exist as os.daemon, but it doesn't (yet)."""
1433
if os.fork():
1434
sys.exit()
1435
os.setsid()
1436
if not nochdir:
1437
os.chdir(u"/")
1438
if os.fork():
1439
sys.exit()
1440
if not noclose:
1441
# Close all standard open file descriptors
1442
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1443
if not stat.S_ISCHR(os.fstat(null).st_mode):
1444
raise OSError(errno.ENODEV,
1445
u"%s not a character device"
1446
% os.path.devnull)
1447
os.dup2(null, sys.stdin.fileno())
1448
os.dup2(null, sys.stdout.fileno())
1449
os.dup2(null, sys.stderr.fileno())
1450
if null > 2:
1451
os.close(null)
1452
1453
1454
def main():
1455
1456
##################################################################
1457
# Parsing of options, both command line and config file
1458
1459
parser = optparse.OptionParser(version = "%%prog %s" % version)
1460
parser.add_option("-i", u"--interface", type=u"string",
1461
metavar="IF", help=u"Bind to interface IF")
1462
parser.add_option("-a", u"--address", type=u"string",
1463
help=u"Address to listen for requests on")
1464
parser.add_option("-p", u"--port", type=u"int",
1465
help=u"Port number to receive requests on")
1466
parser.add_option("--check", action=u"store_true",
1467
help=u"Run self-test")
1468
parser.add_option("--debug", action=u"store_true",
1469
help=u"Debug mode; run in foreground and log to"
1470
u" terminal")
1471
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1472
u" priority string (see GnuTLS documentation)")
1473
parser.add_option("--servicename", type=u"string",
1474
metavar=u"NAME", help=u"Zeroconf service name")
1475
parser.add_option("--configdir", type=u"string",
1476
default=u"/etc/mandos", metavar=u"DIR",
1477
help=u"Directory to search for configuration"
1478
u" files")
1479
parser.add_option("--no-dbus", action=u"store_false",
1480
dest=u"use_dbus", help=u"Do not provide D-Bus"
1481
u" system bus interface")
1482
parser.add_option("--no-ipv6", action=u"store_false",
1483
dest=u"use_ipv6", help=u"Do not use IPv6")
1484
options = parser.parse_args()[0]
526
if "struct" not in sys.modules:
527
import struct
528
if "fcntl" not in sys.modules:
529
import fcntl
530
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
531
s = socket.socket()
532
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
533
struct.pack("16s16x", interface))
534
s.close()
535
interface_index = struct.unpack("I", ifreq[16:20])[0]
536
return interface_index
537
538
539
if __name__ == '__main__':
540
parser = OptionParser()
541
parser.add_option("-i", "--interface", type="string",
542
default=None, metavar="IF",
543
help="Bind to interface IF")
544
parser.add_option("--cert", type="string", default="cert.pem",
545
metavar="FILE",
546
help="Public key certificate PEM file to use")
547
parser.add_option("--key", type="string", default="key.pem",
548
metavar="FILE",
549
help="Private key PEM file to use")
550
parser.add_option("--ca", type="string", default="ca.pem",
551
metavar="FILE",
552
help="Certificate Authority certificate PEM file to use")
553
parser.add_option("--crl", type="string", default="crl.pem",
554
metavar="FILE",
555
help="Certificate Revokation List PEM file to use")
556
parser.add_option("-p", "--port", type="int", default=None,
557
help="Port number to receive requests on")
558
parser.add_option("--timeout", type="string", # Parsed later
559
default="1h",
560
help="Amount of downtime allowed for clients")
561
parser.add_option("--interval", type="string", # Parsed later
562
default="5m",
563
help="How often to check that a client is up")
564
parser.add_option("--check", action="store_true", default=False,
565
help="Run self-test")
566
parser.add_option("--debug", action="store_true", default=False,
567
help="Debug mode")
568
(options, args) = parser.parse_args()
1485
569
1486
570
if options.check:
1487
571
import doctest
1488
572
doctest.testmod()
1489
573
sys.exit()
1490
574
1491
# Default values for config file for server-global settings
1492
server_defaults = { u"interface": u"",
1493
u"address": u"",
1494
u"port": u"",
1495
u"debug": u"False",
1496
u"priority":
1497
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1498
u"servicename": u"Mandos",
1499
u"use_dbus": u"True",
1500
u"use_ipv6": u"True",
1501
}
1502
1503
# Parse config file for server-global settings
1504
server_config = configparser.SafeConfigParser(server_defaults)
1505
del server_defaults
1506
server_config.read(os.path.join(options.configdir,
1507
u"mandos.conf"))
1508
# Convert the SafeConfigParser object to a dict
1509
server_settings = server_config.defaults()
1510
# Use the appropriate methods on the non-string config options
1511
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1512
server_settings[option] = server_config.getboolean(u"DEFAULT",
1513
option)
1514
if server_settings["port"]:
1515
server_settings["port"] = server_config.getint(u"DEFAULT",
1516
u"port")
1517
del server_config
1518
1519
# Override the settings from the config file with command line
1520
# options, if set.
1521
for option in (u"interface", u"address", u"port", u"debug",
1522
u"priority", u"servicename", u"configdir",
1523
u"use_dbus", u"use_ipv6"):
1524
value = getattr(options, option)
1525
if value is not None:
1526
server_settings[option] = value
1527
del options
1528
# Force all strings to be unicode
1529
for option in server_settings.keys():
1530
if type(server_settings[option]) is str:
1531
server_settings[option] = unicode(server_settings[option])
1532
# Now we have our good server settings in "server_settings"
1533
1534
##################################################################
1535
1536
# For convenience
1537
debug = server_settings[u"debug"]
1538
use_dbus = server_settings[u"use_dbus"]
1539
use_ipv6 = server_settings[u"use_ipv6"]
1540
1541
if not debug:
1542
syslogger.setLevel(logging.WARNING)
1543
console.setLevel(logging.WARNING)
1544
1545
if server_settings[u"servicename"] != u"Mandos":
1546
syslogger.setFormatter(logging.Formatter
1547
(u'Mandos (%s) [%%(process)d]:'
1548
u' %%(levelname)s: %%(message)s'
1549
% server_settings[u"servicename"]))
1550
1551
# Parse config file with clients
1552
client_defaults = { u"timeout": u"1h",
1553
u"interval": u"5m",
1554
u"checker": u"fping -q -- %%(host)s",
1555
u"host": u"",
1556
}
1557
client_config = configparser.SafeConfigParser(client_defaults)
1558
client_config.read(os.path.join(server_settings[u"configdir"],
1559
u"clients.conf"))
1560
1561
global mandos_dbus_service
1562
mandos_dbus_service = None
1563
1564
tcp_server = MandosServer((server_settings[u"address"],
1565
server_settings[u"port"]),
1566
ClientHandler,
1567
interface=server_settings[u"interface"],
1568
use_ipv6=use_ipv6,
1569
gnutls_priority=
1570
server_settings[u"priority"],
1571
use_dbus=use_dbus)
1572
pidfilename = u"/var/run/mandos.pid"
1573
try:
1574
pidfile = open(pidfilename, u"w")
1575
except IOError:
1576
logger.error(u"Could not open file %r", pidfilename)
1577
1578
try:
1579
uid = pwd.getpwnam(u"_mandos").pw_uid
1580
gid = pwd.getpwnam(u"_mandos").pw_gid
1581
except KeyError:
1582
try:
1583
uid = pwd.getpwnam(u"mandos").pw_uid
1584
gid = pwd.getpwnam(u"mandos").pw_gid
1585
except KeyError:
1586
try:
1587
uid = pwd.getpwnam(u"nobody").pw_uid
1588
gid = pwd.getpwnam(u"nobody").pw_gid
1589
except KeyError:
1590
uid = 65534
1591
gid = 65534
1592
try:
1593
os.setgid(gid)
1594
os.setuid(uid)
1595
except OSError, error:
1596
if error[0] != errno.EPERM:
1597
raise error
1598
1599
# Enable all possible GnuTLS debugging
1600
if debug:
1601
# "Use a log level over 10 to enable all debugging options."
1602
# - GnuTLS manual
1603
gnutls.library.functions.gnutls_global_set_log_level(11)
1604
1605
@gnutls.library.types.gnutls_log_func
1606
def debug_gnutls(level, string):
1607
logger.debug(u"GnuTLS: %s", string[:-1])
1608
1609
(gnutls.library.functions
1610
.gnutls_global_set_log_function(debug_gnutls))
1611
1612
global main_loop
1613
# From the Avahi example code
575
# Parse the time arguments
576
try:
577
options.timeout = string_to_delta(options.timeout)
578
except ValueError:
579
parser.error("option --timeout: Unparseable time")
580
try:
581
options.interval = string_to_delta(options.interval)
582
except ValueError:
583
parser.error("option --interval: Unparseable time")
584
585
# Parse config file
586
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
587
client_config = ConfigParser.SafeConfigParser(defaults)
588
#client_config.readfp(open("secrets.conf"), "secrets.conf")
589
client_config.read("mandos-clients.conf")
590
591
# From the Avahi server example code
1614
592
DBusGMainLoop(set_as_default=True )
1615
593
main_loop = gobject.MainLoop()
1616
594
bus = dbus.SystemBus()
595
server = dbus.Interface(
596
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
597
avahi.DBUS_INTERFACE_SERVER )
1617
598
# End of Avahi example code
1618
if use_dbus:
1619
try:
1620
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1621
bus, do_not_queue=True)
1622
except dbus.exceptions.NameExistsException, e:
1623
logger.error(unicode(e) + u", disabling D-Bus")
1624
use_dbus = False
1625
server_settings[u"use_dbus"] = False
1626
tcp_server.use_dbus = False
1627
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1628
service = AvahiService(name = server_settings[u"servicename"],
1629
servicetype = u"_mandos._tcp",
1630
protocol = protocol, bus = bus)
1631
if server_settings["interface"]:
1632
service.interface = (if_nametoindex
1633
(str(server_settings[u"interface"])))
1634
1635
client_class = Client
1636
if use_dbus:
1637
client_class = functools.partial(ClientDBus, bus = bus)
1638
tcp_server.clients.update(set(
1639
client_class(name = section,
1640
config= dict(client_config.items(section)))
1641
for section in client_config.sections()))
1642
if not tcp_server.clients:
1643
logger.warning(u"No clients defined")
1644
599
600
debug = options.debug
601
602
clients = Set()
603
def remove_from_clients(client):
604
clients.remove(client)
605
if not clients:
606
if debug:
607
sys.stderr.write(u"No clients left, exiting\n")
608
main_loop.quit()
609
610
clients.update(Set(Client(name=section, options=options,
611
stop_hook = remove_from_clients,
612
**(dict(client_config\
613
.items(section))))
614
for section in client_config.sections()))
615
for client in clients:
616
client.start()
617
618
tcp_server = IPv6_TCPServer((None, options.port),
619
tcp_handler,
620
options=options,
621
clients=clients)
622
# Find out what random port we got
623
servicePort = tcp_server.socket.getsockname()[1]
1645
624
if debug:
1646
# Redirect stdin so all checkers get /dev/null
1647
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1648
os.dup2(null, sys.stdin.fileno())
1649
if null > 2:
1650
os.close(null)
1651
else:
1652
# No console logging
1653
logger.removeHandler(console)
1654
# Close all input and output, do double fork, etc.
1655
daemon()
1656
1657
try:
1658
with pidfile:
1659
pid = os.getpid()
1660
pidfile.write(str(pid) + "\n")
1661
del pidfile
1662
except IOError:
1663
logger.error(u"Could not write to file %r with PID %d",
1664
pidfilename, pid)
1665
except NameError:
1666
# "pidfile" was never created
1667
pass
1668
del pidfilename
1669
1670
if not debug:
1671
signal.signal(signal.SIGINT, signal.SIG_IGN)
1672
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1673
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1674
1675
if use_dbus:
1676
class MandosDBusService(dbus.service.Object):
1677
"""A D-Bus proxy object"""
1678
def __init__(self):
1679
dbus.service.Object.__init__(self, bus, u"/")
1680
_interface = u"se.bsnet.fukt.Mandos"
1681
1682
@dbus.service.signal(_interface, signature=u"o")
1683
def ClientAdded(self, objpath):
1684
"D-Bus signal"
1685
pass
1686
1687
@dbus.service.signal(_interface, signature=u"ss")
1688
def ClientNotFound(self, fingerprint, address):
1689
"D-Bus signal"
1690
pass
1691
1692
@dbus.service.signal(_interface, signature=u"os")
1693
def ClientRemoved(self, objpath, name):
1694
"D-Bus signal"
1695
pass
1696
1697
@dbus.service.method(_interface, out_signature=u"ao")
1698
def GetAllClients(self):
1699
"D-Bus method"
1700
return dbus.Array(c.dbus_object_path
1701
for c in tcp_server.clients)
1702
1703
@dbus.service.method(_interface,
1704
out_signature=u"a{oa{sv}}")
1705
def GetAllClientsWithProperties(self):
1706
"D-Bus method"
1707
return dbus.Dictionary(
1708
((c.dbus_object_path, c.GetAll(u""))
1709
for c in tcp_server.clients),
1710
signature=u"oa{sv}")
1711
1712
@dbus.service.method(_interface, in_signature=u"o")
1713
def RemoveClient(self, object_path):
1714
"D-Bus method"
1715
for c in tcp_server.clients:
1716
if c.dbus_object_path == object_path:
1717
tcp_server.clients.remove(c)
1718
c.remove_from_connection()
1719
# Don't signal anything except ClientRemoved
1720
c.disable(quiet=True)
1721
# Emit D-Bus signal
1722
self.ClientRemoved(object_path, c.name)
1723
return
1724
raise KeyError(object_path)
1725
1726
del _interface
1727
1728
mandos_dbus_service = MandosDBusService()
1729
1730
def cleanup():
1731
"Cleanup function; run on exit"
1732
service.cleanup()
1733
1734
while tcp_server.clients:
1735
client = tcp_server.clients.pop()
1736
if use_dbus:
1737
client.remove_from_connection()
1738
client.disable_hook = None
1739
# Don't signal anything except ClientRemoved
1740
client.disable(quiet=True)
1741
if use_dbus:
1742
# Emit D-Bus signal
1743
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1744
client.name)
1745
1746
atexit.register(cleanup)
1747
1748
for client in tcp_server.clients:
1749
if use_dbus:
1750
# Emit D-Bus signal
1751
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1752
client.enable()
1753
1754
tcp_server.enable()
1755
tcp_server.server_activate()
1756
1757
# Find out what port we got
1758
service.port = tcp_server.socket.getsockname()[1]
1759
if use_ipv6:
1760
logger.info(u"Now listening on address %r, port %d,"
1761
" flowinfo %d, scope_id %d"
1762
% tcp_server.socket.getsockname())
1763
else: # IPv4
1764
logger.info(u"Now listening on address %r, port %d"
1765
% tcp_server.socket.getsockname())
1766
1767
#service.interface = tcp_server.socket.getsockname()[3]
1768
1769
try:
1770
# From the Avahi example code
1771
try:
1772
service.activate()
1773
except dbus.exceptions.DBusException, error:
1774
logger.critical(u"DBusException: %s", error)
1775
cleanup()
1776
sys.exit(1)
1777
# End of Avahi example code
1778
1779
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1780
lambda *args, **kwargs:
1781
(tcp_server.handle_request
1782
(*args[2:], **kwargs) or True))
1783
1784
logger.debug(u"Starting main loop")
625
sys.stderr.write(u"Now listening on port %d\n" % servicePort)
626
627
if options.interface is not None:
628
serviceInterface = if_nametoindex(options.interface)
629
630
# From the Avahi server example code
631
server.connect_to_signal("StateChanged", server_state_changed)
632
server_state_changed(server.GetState())
633
# End of Avahi example code
634
635
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
636
lambda *args, **kwargs:
637
tcp_server.handle_request(*args[2:],
638
**kwargs) or True)
639
try:
1785
640
main_loop.run()
1786
except AvahiError, error:
1787
logger.critical(u"AvahiError: %s", error)
1788
cleanup()
1789
sys.exit(1)
1790
641
except KeyboardInterrupt:
1791
if debug:
1792
print >> sys.stderr
1793
logger.debug(u"Server received KeyboardInterrupt")
1794
logger.debug(u"Server exiting")
1795
# Must run before the D-Bus bus name gets deregistered
1796
cleanup()
642
print
643
644
# Cleanup here
1797
645
1798
if __name__ == '__main__':
1799
main()
646
# From the Avahi server example code
647
if not group is None:
648
group.Free()
649
# End of Avahi example code
650
651
for client in clients:
652
client.stop_hook = None
653
client.stop()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0