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- Committer: Teddy Hogeborn
- Date: 2009-11-05 02:12:57 UTC
- Revision ID: teddy@fukt.bsnet.se-20091105021257-l2b5nb1v4pc2tupw
* mandos (ClientDBus.disable): Bug fix: complete rename of "log" and
"signal" to "quiet".
"signal" to "quiet".
- files added:
- NEWS
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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".
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12
#
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13
# Everything else is
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# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
17
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# it under the terms of the GNU General Public License as published by
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# Contact the authors at <mandos@fukt.bsnet.se>.
31
32
#
32
33
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from __future__ import division
34
from __future__ import division, with_statement, absolute_import
34
35
35
import SocketServer
36
import SocketServer as socketserver
36
37
import socket
37
import select
38
from optparse import OptionParser
38
import optparse
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import datetime
40
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import errno
41
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import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
59
62
60
63
import dbus
64
import dbus.service
61
65
import gobject
62
66
import avahi
63
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from dbus.mainloop.glib import DBusGMainLoop
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68
import ctypes
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
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'))
74
91
logger.addHandler(syslogger)
75
92
76
93
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
79
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logger.addHandler(console)
80
98
81
99
class AvahiError(Exception):
82
def __init__(self, value):
100
def __init__(self, value, *args, **kwargs):
83
101
self.value = value
84
def __str__(self):
85
return repr(self.value)
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
86
105
87
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class AvahiServiceError(AvahiError):
88
107
pass
93
112
94
113
class AvahiService(object):
95
114
"""An Avahi (Zeroconf) service.
115
96
116
Attributes:
97
117
interface: integer; avahi.IF_UNSPEC or an interface index.
98
118
Used to optionally bind to the specified interface.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
101
121
See <http://www.dns-sd.org/ServiceTypes.html>
102
122
port: integer; what port to announce
103
123
TXT: list of strings; TXT record for the service
106
126
max_renames: integer; maximum number of renames
107
127
rename_count: integer; counter so we only rename after collisions
108
128
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
109
132
"""
110
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
113
137
self.interface = interface
114
138
self.name = name
115
self.type = type
139
self.type = servicetype
116
140
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
141
self.TXT = TXT if TXT is not None else []
121
142
self.domain = domain
122
143
self.host = host
123
144
self.rename_count = 0
124
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
125
150
def rename(self):
126
151
"""Derived from the Avahi example code"""
127
152
if self.rename_count >= self.max_renames:
128
153
logger.critical(u"No suitable Zeroconf service name found"
129
154
u" after %i retries, exiting.",
130
rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
155
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
133
158
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
138
164
self.remove()
139
165
self.add()
140
166
self.rename_count += 1
141
167
def remove(self):
142
168
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
169
if self.group is not None:
170
self.group.Reset()
145
171
def add(self):
146
172
"""Derived from the Avahi example code"""
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
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)
155
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
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())
170
228
171
229
172
230
class Client(object):
173
231
"""A representation of a client host served by this server.
232
174
233
Attributes:
175
name: string; from the config file, used in log messages
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
176
236
fingerprint: string (40 or 32 hexadecimal digits); used to
177
237
uniquely identify the client
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
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.
189
251
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
252
disable_initiator_tag: - '' -
191
253
checker_callback_tag: - '' -
192
254
checker_command: string; External command which is run to check if
193
255
client lives. %() expansions are done at
194
256
runtime with vars(self) as dict, so that for
195
257
instance %(name)s can be used in the command.
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
258
current_checker_command: string; current running checker_command
201
259
"""
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
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):
226
277
"""Note: the 'checker' key in 'config' sets the
227
278
'checker_command' attribute and *not* the 'checker'
228
279
attribute."""
229
280
self.name = name
281
if config is None:
282
config = {}
230
283
logger.debug(u"Creating client %r", self.name)
231
284
# Uppercase and remove spaces from fingerprint for later
232
285
# comparison purposes with return value from the fingerprint()
233
286
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
236
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
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()
243
298
else:
244
299
raise TypeError(u"No secret or secfile for client %s"
245
300
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
248
305
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
252
309
self.checker = None
253
310
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
311
self.disable_initiator_tag = None
255
312
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
316
317
def enable(self):
258
318
"""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()
259
323
# Schedule a new checker to be started an 'interval' from now,
260
324
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
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
264
333
# Also start a new checker *right now*.
265
334
self.start_checker()
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
335
336
def disable(self, quiet=True):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
279
339
return False
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
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):
284
346
gobject.source_remove(self.checker_initiator_tag)
285
347
self.checker_initiator_tag = None
286
348
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
349
if self.disable_hook:
350
self.disable_hook(self)
351
self.enabled = False
289
352
# Do not run this again if called by a gobject.timeout_add
290
353
return False
354
291
355
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
356
self.disable_hook = None
357
self.disable()
358
359
def checker_callback(self, pid, condition, command):
295
360
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
361
self.checker_callback_tag = None
298
362
self.checker = None
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
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:
309
373
logger.warning(u"Checker for %(name)s crashed?",
310
374
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
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
314
388
def start_checker(self):
315
389
"""Start a new checker subprocess if one is not running.
390
316
391
If a checker already exists, leave it running and do
317
392
nothing."""
318
393
# The reason for not killing a running checker is that if we
323
398
# checkers alone, the checker would have to take more time
324
399
# than 'timeout' for the client to be declared invalid, which
325
400
# 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
326
416
if self.checker is None:
327
417
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
418
# In case checker_command has exactly one % operator
419
command = self.checker_command % self.host
330
420
except TypeError:
331
421
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
333
426
for key, val in
334
427
vars(self).iteritems())
335
428
try:
336
command = self.check_command % escaped_attrs
429
command = self.checker_command % escaped_attrs
337
430
except TypeError, error:
338
431
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
432
u' %s', self.checker_command, error)
340
433
return True # Try again later
434
self.current_checker_command = command
341
435
try:
342
436
logger.info(u"Starting checker %r for %s",
343
437
command, self.name)
347
441
# always replaced by /dev/null.)
348
442
self.checker = subprocess.Popen(command,
349
443
close_fds=True,
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
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)
354
455
except OSError, error:
355
456
logger.error(u"Failed to start subprocess: %s",
356
457
error)
357
458
# Re-run this periodically if run by gobject.timeout_add
358
459
return True
460
359
461
def stop_checker(self):
360
462
"""Force the checker process, if any, to stop."""
361
463
if self.checker_callback_tag:
362
464
gobject.source_remove(self.checker_callback_tag)
363
465
self.checker_callback_tag = None
364
if getattr(self, "checker", None) is None:
466
if getattr(self, u"checker", None) is None:
365
467
return
366
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
367
469
try:
368
470
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
471
#time.sleep(0.5)
370
472
#if self.checker.poll() is None:
371
473
# os.kill(self.checker.pid, signal.SIGKILL)
372
474
except OSError, error:
373
475
if error.errno != errno.ESRCH: # No such process
374
476
raise
375
477
self.checker = None
478
376
479
def still_valid(self):
377
480
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
481
if not getattr(self, u"enabled", False):
482
return False
483
now = datetime.datetime.utcnow()
379
484
if self.last_checked_ok is None:
380
485
return now < (self.created + self.timeout)
381
486
else:
382
487
return now < (self.last_checked_ok + self.timeout)
383
488
384
489
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
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.
442
988
Note: This will run in its own forked process."""
443
989
444
990
def handle(self):
445
991
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
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
1047
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
1067
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
518
1154
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
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
522
1158
"""
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
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)
533
1166
def server_bind(self):
534
1167
"""This overrides the normal server_bind() function
535
1168
to bind to an interface if one was specified, and also NOT to
536
1169
bind to an address or port if they were not specified."""
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
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
551
1192
# Only bind(2) the socket if we really need to.
552
1193
if self.server_address[0] or self.server_address[1]:
553
1194
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
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,
556
1200
self.server_address[1])
557
1201
elif not self.server_address[1]:
558
1202
self.server_address = (self.server_address[0],
559
1203
0)
560
# if self.settings["interface"]:
1204
# if self.interface:
561
1205
# self.server_address = (self.server_address[0],
562
1206
# 0, # port
563
1207
# 0, # flowinfo
564
1208
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
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)
568
1236
def server_activate(self):
569
1237
if self.enabled:
570
return super(type(self), self).server_activate()
1238
return socketserver.TCPServer.server_activate(self)
571
1239
def enable(self):
572
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
573
1315
574
1316
575
1317
def string_to_delta(interval):
576
1318
"""Parse a string and return a datetime.timedelta
577
578
>>> string_to_delta('7d')
1319
1320
>>> string_to_delta(u'7d')
579
1321
datetime.timedelta(7)
580
>>> string_to_delta('60s')
1322
>>> string_to_delta(u'60s')
581
1323
datetime.timedelta(0, 60)
582
>>> string_to_delta('60m')
1324
>>> string_to_delta(u'60m')
583
1325
datetime.timedelta(0, 3600)
584
>>> string_to_delta('24h')
1326
>>> string_to_delta(u'24h')
585
1327
datetime.timedelta(1)
586
1328
>>> string_to_delta(u'1w')
587
1329
datetime.timedelta(7)
588
>>> string_to_delta('5m 30s')
1330
>>> string_to_delta(u'5m 30s')
589
1331
datetime.timedelta(0, 330)
590
1332
"""
591
1333
timevalue = datetime.timedelta(0)
592
1334
for s in interval.split():
593
1335
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
1336
suffix = unicode(s[-1])
1337
value = int(s[:-1])
596
1338
if suffix == u"d":
597
1339
delta = datetime.timedelta(value)
598
1340
elif suffix == u"s":
604
1346
elif suffix == u"w":
605
1347
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
1348
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
1349
raise ValueError(u"Unknown suffix %r" % suffix)
1350
except (ValueError, IndexError), e:
1351
raise ValueError(e.message)
610
1352
timevalue += delta
611
1353
return timevalue
612
1354
613
1355
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
637
1356
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
1357
"""Call the C function if_nametoindex(), or equivalent
1358
1359
Note: This function cannot accept a unicode string."""
639
1360
global if_nametoindex
640
1361
try:
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
1362
if_nametoindex = (ctypes.cdll.LoadLibrary
1363
(ctypes.util.find_library(u"c"))
1364
.if_nametoindex)
645
1365
except (OSError, AttributeError):
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
1366
logger.warning(u"Doing if_nametoindex the hard way")
650
1367
def if_nametoindex(interface):
651
1368
"Get an interface index the hard way, i.e. using fcntl()"
652
1369
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
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]
658
1376
return interface_index
659
1377
return if_nametoindex(interface)
660
1378
661
1379
662
1380
def daemon(nochdir = False, noclose = False):
663
1381
"""See daemon(3). Standard BSD Unix function.
1382
664
1383
This should really exist as os.daemon, but it doesn't (yet)."""
665
1384
if os.fork():
666
1385
sys.exit()
667
1386
os.setsid()
668
1387
if not nochdir:
669
os.chdir("/")
1388
os.chdir(u"/")
670
1389
if os.fork():
671
1390
sys.exit()
672
1391
if not noclose:
674
1393
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
675
1394
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
1395
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
1396
u"%s not a character device"
1397
% os.path.devnull)
678
1398
os.dup2(null, sys.stdin.fileno())
679
1399
os.dup2(null, sys.stdout.fileno())
680
1400
os.dup2(null, sys.stderr.fileno())
683
1403
684
1404
685
1405
def main():
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
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]
710
1436
711
1437
if options.check:
712
1438
import doctest
714
1440
sys.exit()
715
1441
716
1442
# Default values for config file for server-global settings
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
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",
724
1452
}
725
1453
726
1454
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1455
server_config = configparser.SafeConfigParser(server_defaults)
728
1456
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1457
server_config.read(os.path.join(options.configdir,
1458
u"mandos.conf"))
730
1459
# Convert the SafeConfigParser object to a dict
731
1460
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
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")
735
1468
del server_config
736
1469
737
1470
# Override the settings from the config file with command line
738
1471
# options, if set.
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
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"):
741
1475
value = getattr(options, option)
742
1476
if value is not None:
743
1477
server_settings[option] = value
744
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])
745
1483
# Now we have our good server settings in "server_settings"
746
1484
747
debug = server_settings["debug"]
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"]
748
1491
749
1492
if not debug:
750
1493
syslogger.setLevel(logging.WARNING)
751
1494
console.setLevel(logging.WARNING)
752
1495
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
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"]))
758
1501
759
1502
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
1503
client_defaults = { u"timeout": u"1h",
1504
u"interval": u"5m",
1505
u"checker": u"fping -q -- %%(host)s",
1506
u"host": u"",
764
1507
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
767
"clients.conf"))
768
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
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)
798
1545
os.setuid(uid)
799
os.setgid(gid)
800
1546
except OSError, error:
801
1547
if error[0] != errno.EPERM:
802
1548
raise error
803
1549
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
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))
810
1562
811
1563
global main_loop
812
global bus
813
global server
814
1564
# From the Avahi example code
815
1565
DBusGMainLoop(set_as_default=True )
816
1566
main_loop = gobject.MainLoop()
817
1567
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
1568
# End of Avahi example code
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
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
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")
837
1595
838
1596
if debug:
839
1597
# Redirect stdin so all checkers get /dev/null
848
1606
daemon()
849
1607
850
1608
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
1609
with closing(pidfile):
1610
pid = os.getpid()
1611
pidfile.write(str(pid) + "\n")
854
1612
del pidfile
855
except IOError, err:
1613
except IOError:
856
1614
logger.error(u"Could not write to file %r with PID %d",
857
1615
pidfilename, pid)
858
1616
except NameError:
860
1618
pass
861
1619
del pidfilename
862
1620
1621
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()
1680
863
1681
def cleanup():
864
1682
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
1683
service.cleanup()
871
1684
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
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)
876
1696
877
1697
atexit.register(cleanup)
878
1698
879
if not debug:
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
884
for client in clients:
885
client.start()
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()
886
1705
887
1706
tcp_server.enable()
888
1707
tcp_server.server_activate()
889
1708
890
1709
# Find out what port we got
891
1710
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
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())
894
1718
895
1719
#service.interface = tcp_server.socket.getsockname()[3]
896
1720
897
1721
try:
898
1722
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
1723
try:
901
server_state_changed(server.GetState())
1724
service.activate()
902
1725
except dbus.exceptions.DBusException, error:
903
1726
logger.critical(u"DBusException: %s", error)
1727
cleanup()
904
1728
sys.exit(1)
905
1729
# End of Avahi example code
906
1730
907
1731
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
1732
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
1733
(tcp_server.handle_request
1734
(*args[2:], **kwargs) or True))
911
1735
912
1736
logger.debug(u"Starting main loop")
913
main_loop_started = True
914
1737
main_loop.run()
915
1738
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
1739
logger.critical(u"AvahiError: %s", error)
1740
cleanup()
917
1741
sys.exit(1)
918
1742
except KeyboardInterrupt:
919
1743
if debug:
920
print
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()
921
1749
922
1750
if __name__ == '__main__':
923
1751
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0