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- Committer: Teddy Hogeborn
- Date: 2008-09-04 13:36:59 UTC
- Revision ID: teddy@fukt.bsnet.se-20080904133659-0omre4j6luosb20q
* mandos-clients.conf.xml (OPTIONS): Improved spelling.
* mandos.conf.xml (BUGS): - '' -
* mandos.xml (BUGS): - '' -
* plugin-runner.xml (NAME): Fix spelling by changing wording.
(OPTIONS): Improved spelling.
(EXAMPLE): Do not use obsolete "--keydir" option. Improved wording.
* plugins.d/password-prompt.xml (DESCRIPTION): Improved spelling.
(EXAMPLE): Add <acronym> tag.
(SECURITY): Improved spelling.
* plugins.d/password-request.xml (SYNOPSIS): Changed replaceable to
match OPTIONS section.
(DESCRIPTION, OVERVIEW): Improved spelling.
* mandos.conf.xml (BUGS): - '' -
* mandos.xml (BUGS): - '' -
* plugin-runner.xml (NAME): Fix spelling by changing wording.
(OPTIONS): Improved spelling.
(EXAMPLE): Do not use obsolete "--keydir" option. Improved wording.
* plugins.d/password-prompt.xml (DESCRIPTION): Improved spelling.
(EXAMPLE): Add <acronym> tag.
(SECURITY): Improved spelling.
* plugins.d/password-request.xml (SYNOPSIS): Changed replaceable to
match OPTIONS section.
(DESCRIPTION, OVERVIEW): Improved spelling.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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12
#
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# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
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# This program is free software: you can redistribute it and/or modify
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17
# 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>.
32
31
#
33
32
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from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
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import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
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 as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
64
58
65
59
import dbus
66
import dbus.service
67
60
import gobject
68
61
import avahi
69
62
from dbus.mainloop.glib import DBusGMainLoop
70
63
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
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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.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
88
syslogger = (logging.handlers.SysLogHandler
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
90
address = "/dev/log"))
91
syslogger.setFormatter(logging.Formatter
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
64
65
version = "1.0"
66
67
logger = logging.Logger('mandos')
68
syslogger = logging.handlers.SysLogHandler\
69
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
70
address = "/dev/log")
71
syslogger.setFormatter(logging.Formatter\
72
('Mandos: %(levelname)s: %(message)s'))
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logger.addHandler(syslogger)
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74
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console = logging.StreamHandler()
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
77
' %(message)s'))
100
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logger.addHandler(console)
101
79
102
80
class AvahiError(Exception):
103
def __init__(self, value, *args, **kwargs):
81
def __init__(self, value):
104
82
self.value = value
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
83
def __str__(self):
84
return repr(self.value)
108
85
109
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class AvahiServiceError(AvahiError):
110
87
pass
115
92
116
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class AvahiService(object):
117
94
"""An Avahi (Zeroconf) service.
118
119
95
Attributes:
120
96
interface: integer; avahi.IF_UNSPEC or an interface index.
121
97
Used to optionally bind to the specified interface.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
98
name: string; Example: 'Mandos'
99
type: string; Example: '_mandos._tcp'.
124
100
See <http://www.dns-sd.org/ServiceTypes.html>
125
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port: integer; what port to announce
126
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TXT: list of strings; TXT record for the service
129
105
max_renames: integer; maximum number of renames
130
106
rename_count: integer; counter so we only rename after collisions
131
107
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
135
108
"""
136
109
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
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self.interface = interface
141
113
self.name = name
142
self.type = servicetype
114
self.type = type
143
115
self.port = port
144
self.TXT = TXT if TXT is not None else []
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
145
120
self.domain = domain
146
121
self.host = host
147
122
self.rename_count = 0
148
123
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
153
124
def rename(self):
154
125
"""Derived from the Avahi example code"""
155
126
if self.rename_count >= self.max_renames:
156
127
logger.critical(u"No suitable Zeroconf service name found"
157
128
u" after %i retries, exiting.",
158
self.rename_count)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
129
rename_count)
130
raise AvahiServiceError("Too many renames")
131
self.name = server.GetAlternativeServiceName(self.name)
161
132
logger.info(u"Changing Zeroconf service name to %r ...",
162
self.name)
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(message)s' % self.name))
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137
self.remove()
168
138
self.add()
169
139
self.rename_count += 1
170
140
def remove(self):
171
141
"""Derived from the Avahi example code"""
172
if self.group is not None:
173
self.group.Reset()
142
if group is not None:
143
group.Reset()
174
144
def add(self):
175
145
"""Derived from the Avahi example code"""
176
if self.group is None:
177
self.group = dbus.Interface(
178
self.bus.get_object(avahi.DBUS_NAME,
179
self.server.EntryGroupNew()),
180
avahi.DBUS_INTERFACE_ENTRY_GROUP)
181
self.group.connect_to_signal('StateChanged',
182
self
183
.entry_group_state_changed)
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
184
154
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
185
self.name, self.type)
186
self.group.AddService(
187
self.interface,
188
self.protocol,
189
dbus.UInt32(0), # flags
190
self.name, self.type,
191
self.domain, self.host,
192
dbus.UInt16(self.port),
193
avahi.string_array_to_txt_array(self.TXT))
194
self.group.Commit()
195
def entry_group_state_changed(self, state, error):
196
"""Derived from the Avahi example code"""
197
logger.debug(u"Avahi entry group state change: %i", state)
198
199
if state == avahi.ENTRY_GROUP_ESTABLISHED:
200
logger.debug(u"Zeroconf service established.")
201
elif state == avahi.ENTRY_GROUP_COLLISION:
202
logger.warning(u"Zeroconf service name collision.")
203
self.rename()
204
elif state == avahi.ENTRY_GROUP_FAILURE:
205
logger.critical(u"Avahi: Error in group state changed %s",
206
unicode(error))
207
raise AvahiGroupError(u"State changed: %s"
208
% unicode(error))
209
def cleanup(self):
210
"""Derived from the Avahi example code"""
211
if self.group is not None:
212
self.group.Free()
213
self.group = None
214
def server_state_changed(self, state):
215
"""Derived from the Avahi example code"""
216
logger.debug(u"Avahi server state change: %i", state)
217
if state == avahi.SERVER_COLLISION:
218
logger.error(u"Zeroconf server name collision")
219
self.remove()
220
elif state == avahi.SERVER_RUNNING:
221
self.add()
222
def activate(self):
223
"""Derived from the Avahi example code"""
224
if self.server is None:
225
self.server = dbus.Interface(
226
self.bus.get_object(avahi.DBUS_NAME,
227
avahi.DBUS_PATH_SERVER),
228
avahi.DBUS_INTERFACE_SERVER)
229
self.server.connect_to_signal(u"StateChanged",
230
self.server_state_changed)
231
self.server_state_changed(self.server.GetState())
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
232
169
233
170
234
171
class Client(object):
235
172
"""A representation of a client host served by this server.
236
237
173
Attributes:
238
name: string; from the config file, used in log messages and
239
D-Bus identifiers
174
name: string; from the config file, used in log messages
240
175
fingerprint: string (40 or 32 hexadecimal digits); used to
241
176
uniquely identify the client
242
secret: bytestring; sent verbatim (over TLS) to client
243
host: string; available for use by the checker command
244
created: datetime.datetime(); (UTC) object creation
245
last_enabled: datetime.datetime(); (UTC)
246
enabled: bool()
247
last_checked_ok: datetime.datetime(); (UTC) or None
248
timeout: datetime.timedelta(); How long from last_checked_ok
249
until this client is disabled
250
interval: datetime.timedelta(); How often to start a new checker
251
disable_hook: If set, called by disable() as disable_hook(self)
252
checker: subprocess.Popen(); a running checker process used
253
to see if the client lives.
254
'None' if no process is running.
177
secret: bytestring; sent verbatim (over TLS) to client
178
host: string; available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
255
188
checker_initiator_tag: a gobject event source tag, or None
256
disable_initiator_tag: - '' -
189
stop_initiator_tag: - '' -
257
190
checker_callback_tag: - '' -
258
191
checker_command: string; External command which is run to check if
259
192
client lives. %() expansions are done at
260
193
runtime with vars(self) as dict, so that for
261
194
instance %(name)s can be used in the command.
262
current_checker_command: string; current running checker_command
263
approved_delay: datetime.timedelta(); Time to wait for approval
264
_approved: bool(); 'None' if not yet approved/disapproved
265
approved_duration: datetime.timedelta(); Duration of one approval
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
266
200
"""
267
268
@staticmethod
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
275
def timeout_milliseconds(self):
276
"Return the 'timeout' attribute in milliseconds"
277
return self._timedelta_to_milliseconds(self.timeout)
278
279
def interval_milliseconds(self):
280
"Return the 'interval' attribute in milliseconds"
281
return self._timedelta_to_milliseconds(self.interval)
282
283
def approved_delay_milliseconds(self):
284
return self._timedelta_to_milliseconds(self.approved_delay)
285
286
def __init__(self, name = None, disable_hook=None, config=None):
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name = None, stop_hook=None, config={}):
287
225
"""Note: the 'checker' key in 'config' sets the
288
226
'checker_command' attribute and *not* the 'checker'
289
227
attribute."""
290
228
self.name = name
291
if config is None:
292
config = {}
293
229
logger.debug(u"Creating client %r", self.name)
294
230
# Uppercase and remove spaces from fingerprint for later
295
231
# comparison purposes with return value from the fingerprint()
296
232
# function
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
299
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
300
if u"secret" in config:
301
self.secret = config[u"secret"].decode(u"base64")
302
elif u"secfile" in config:
303
with open(os.path.expanduser(os.path.expandvars
304
(config[u"secfile"])),
305
"rb") as secfile:
306
self.secret = secfile.read()
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
sf = open(config["secfile"])
240
self.secret = sf.read()
241
sf.close()
307
242
else:
308
243
raise TypeError(u"No secret or secfile for client %s"
309
244
% self.name)
310
self.host = config.get(u"host", u"")
311
self.created = datetime.datetime.utcnow()
312
self.enabled = False
313
self.last_enabled = None
245
self.host = config.get("host", "")
246
self.created = datetime.datetime.now()
314
247
self.last_checked_ok = None
315
self.timeout = string_to_delta(config[u"timeout"])
316
self.interval = string_to_delta(config[u"interval"])
317
self.disable_hook = disable_hook
248
self.timeout = string_to_delta(config["timeout"])
249
self.interval = string_to_delta(config["interval"])
250
self.stop_hook = stop_hook
318
251
self.checker = None
319
252
self.checker_initiator_tag = None
320
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
321
254
self.checker_callback_tag = None
322
self.checker_command = config[u"checker"]
323
self.current_checker_command = None
324
self.last_connect = None
325
self._approved = None
326
self.approved_by_default = config.get(u"approved_by_default",
327
True)
328
self.approvals_pending = 0
329
self.approved_delay = string_to_delta(
330
config[u"approved_delay"])
331
self.approved_duration = string_to_delta(
332
config[u"approved_duration"])
333
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
334
335
def send_changedstate(self):
336
self.changedstate.acquire()
337
self.changedstate.notify_all()
338
self.changedstate.release()
339
340
def enable(self):
255
self.check_command = config["checker"]
256
def start(self):
341
257
"""Start this client's checker and timeout hooks"""
342
if getattr(self, u"enabled", False):
343
# Already enabled
344
return
345
self.send_changedstate()
346
self.last_enabled = datetime.datetime.utcnow()
347
258
# Schedule a new checker to be started an 'interval' from now,
348
259
# and every interval from then on.
349
self.checker_initiator_tag = (gobject.timeout_add
350
(self.interval_milliseconds(),
351
self.start_checker))
352
# Schedule a disable() when 'timeout' has passed
353
self.disable_initiator_tag = (gobject.timeout_add
354
(self.timeout_milliseconds(),
355
self.disable))
356
self.enabled = True
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
357
263
# Also start a new checker *right now*.
358
264
self.start_checker()
359
360
def disable(self, quiet=True):
361
"""Disable this client."""
362
if not getattr(self, "enabled", False):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if hasattr(self, "secret") and self.secret:
275
logger.info(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
363
278
return False
364
if not quiet:
365
self.send_changedstate()
366
if not quiet:
367
logger.info(u"Disabling client %s", self.name)
368
if getattr(self, u"disable_initiator_tag", False):
369
gobject.source_remove(self.disable_initiator_tag)
370
self.disable_initiator_tag = None
371
if getattr(self, u"checker_initiator_tag", False):
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
372
283
gobject.source_remove(self.checker_initiator_tag)
373
284
self.checker_initiator_tag = None
374
285
self.stop_checker()
375
if self.disable_hook:
376
self.disable_hook(self)
377
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
378
288
# Do not run this again if called by a gobject.timeout_add
379
289
return False
380
381
290
def __del__(self):
382
self.disable_hook = None
383
self.disable()
384
385
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
386
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
387
296
self.checker_callback_tag = None
388
297
self.checker = None
389
if os.WIFEXITED(condition):
390
exitstatus = os.WEXITSTATUS(condition)
391
if exitstatus == 0:
392
logger.info(u"Checker for %(name)s succeeded",
393
vars(self))
394
self.checked_ok()
395
else:
396
logger.info(u"Checker for %(name)s failed",
397
vars(self))
398
else:
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.info(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
399
308
logger.warning(u"Checker for %(name)s crashed?",
400
309
vars(self))
401
402
def checked_ok(self):
403
"""Bump up the timeout for this client.
404
405
This should only be called when the client has been seen,
406
alive and well.
407
"""
408
self.last_checked_ok = datetime.datetime.utcnow()
409
gobject.source_remove(self.disable_initiator_tag)
410
self.disable_initiator_tag = (gobject.timeout_add
411
(self.timeout_milliseconds(),
412
self.disable))
413
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
414
313
def start_checker(self):
415
314
"""Start a new checker subprocess if one is not running.
416
417
315
If a checker already exists, leave it running and do
418
316
nothing."""
419
317
# The reason for not killing a running checker is that if we
422
320
# client would inevitably timeout, since no checker would get
423
321
# a chance to run to completion. If we instead leave running
424
322
# checkers alone, the checker would have to take more time
425
# than 'timeout' for the client to be disabled, which is as it
426
# should be.
427
428
# If a checker exists, make sure it is not a zombie
429
try:
430
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
431
except (AttributeError, OSError), error:
432
if (isinstance(error, OSError)
433
and error.errno != errno.ECHILD):
434
raise error
435
else:
436
if pid:
437
logger.warning(u"Checker was a zombie")
438
gobject.source_remove(self.checker_callback_tag)
439
self.checker_callback(pid, status,
440
self.current_checker_command)
441
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
442
325
if self.checker is None:
443
326
try:
444
# In case checker_command has exactly one % operator
445
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
446
329
except TypeError:
447
330
# Escape attributes for the shell
448
escaped_attrs = dict((key,
449
re.escape(unicode(str(val),
450
errors=
451
u'replace')))
331
escaped_attrs = dict((key, re.escape(str(val)))
452
332
for key, val in
453
333
vars(self).iteritems())
454
334
try:
455
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
456
336
except TypeError, error:
457
337
logger.error(u'Could not format string "%s":'
458
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
459
339
return True # Try again later
460
self.current_checker_command = command
461
340
try:
462
341
logger.info(u"Starting checker %r for %s",
463
342
command, self.name)
467
346
# always replaced by /dev/null.)
468
347
self.checker = subprocess.Popen(command,
469
348
close_fds=True,
470
shell=True, cwd=u"/")
471
self.checker_callback_tag = (gobject.child_watch_add
472
(self.checker.pid,
473
self.checker_callback,
474
data=command))
475
# The checker may have completed before the gobject
476
# watch was added. Check for this.
477
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
478
if pid:
479
gobject.source_remove(self.checker_callback_tag)
480
self.checker_callback(pid, status, command)
349
shell=True, cwd="/")
350
self.checker_callback_tag = gobject.child_watch_add\
351
(self.checker.pid,
352
self.checker_callback)
481
353
except OSError, error:
482
354
logger.error(u"Failed to start subprocess: %s",
483
355
error)
484
356
# Re-run this periodically if run by gobject.timeout_add
485
357
return True
486
487
358
def stop_checker(self):
488
359
"""Force the checker process, if any, to stop."""
489
360
if self.checker_callback_tag:
490
361
gobject.source_remove(self.checker_callback_tag)
491
362
self.checker_callback_tag = None
492
if getattr(self, u"checker", None) is None:
363
if getattr(self, "checker", None) is None:
493
364
return
494
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
495
366
try:
496
367
os.kill(self.checker.pid, signal.SIGTERM)
497
#time.sleep(0.5)
368
#os.sleep(0.5)
498
369
#if self.checker.poll() is None:
499
370
# os.kill(self.checker.pid, signal.SIGKILL)
500
371
except OSError, error:
501
372
if error.errno != errno.ESRCH: # No such process
502
373
raise
503
374
self.checker = None
504
505
def dbus_service_property(dbus_interface, signature=u"v",
506
access=u"readwrite", byte_arrays=False):
507
"""Decorators for marking methods of a DBusObjectWithProperties to
508
become properties on the D-Bus.
509
510
The decorated method will be called with no arguments by "Get"
511
and with one argument by "Set".
512
513
The parameters, where they are supported, are the same as
514
dbus.service.method, except there is only "signature", since the
515
type from Get() and the type sent to Set() is the same.
516
"""
517
# Encoding deeply encoded byte arrays is not supported yet by the
518
# "Set" method, so we fail early here:
519
if byte_arrays and signature != u"ay":
520
raise ValueError(u"Byte arrays not supported for non-'ay'"
521
u" signature %r" % signature)
522
def decorator(func):
523
func._dbus_is_property = True
524
func._dbus_interface = dbus_interface
525
func._dbus_signature = signature
526
func._dbus_access = access
527
func._dbus_name = func.__name__
528
if func._dbus_name.endswith(u"_dbus_property"):
529
func._dbus_name = func._dbus_name[:-14]
530
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
531
return func
532
return decorator
533
534
535
class DBusPropertyException(dbus.exceptions.DBusException):
536
"""A base class for D-Bus property-related exceptions
537
"""
538
def __unicode__(self):
539
return unicode(str(self))
540
541
542
class DBusPropertyAccessException(DBusPropertyException):
543
"""A property's access permissions disallows an operation.
544
"""
545
pass
546
547
548
class DBusPropertyNotFound(DBusPropertyException):
549
"""An attempt was made to access a non-existing property.
550
"""
551
pass
552
553
554
class DBusObjectWithProperties(dbus.service.Object):
555
"""A D-Bus object with properties.
556
557
Classes inheriting from this can use the dbus_service_property
558
decorator to expose methods as D-Bus properties. It exposes the
559
standard Get(), Set(), and GetAll() methods on the D-Bus.
560
"""
561
562
@staticmethod
563
def _is_dbus_property(obj):
564
return getattr(obj, u"_dbus_is_property", False)
565
566
def _get_all_dbus_properties(self):
567
"""Returns a generator of (name, attribute) pairs
568
"""
569
return ((prop._dbus_name, prop)
570
for name, prop in
571
inspect.getmembers(self, self._is_dbus_property))
572
573
def _get_dbus_property(self, interface_name, property_name):
574
"""Returns a bound method if one exists which is a D-Bus
575
property with the specified name and interface.
576
"""
577
for name in (property_name,
578
property_name + u"_dbus_property"):
579
prop = getattr(self, name, None)
580
if (prop is None
581
or not self._is_dbus_property(prop)
582
or prop._dbus_name != property_name
583
or (interface_name and prop._dbus_interface
584
and interface_name != prop._dbus_interface)):
585
continue
586
return prop
587
# No such property
588
raise DBusPropertyNotFound(self.dbus_object_path + u":"
589
+ interface_name + u"."
590
+ property_name)
591
592
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
593
out_signature=u"v")
594
def Get(self, interface_name, property_name):
595
"""Standard D-Bus property Get() method, see D-Bus standard.
596
"""
597
prop = self._get_dbus_property(interface_name, property_name)
598
if prop._dbus_access == u"write":
599
raise DBusPropertyAccessException(property_name)
600
value = prop()
601
if not hasattr(value, u"variant_level"):
602
return value
603
return type(value)(value, variant_level=value.variant_level+1)
604
605
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
606
def Set(self, interface_name, property_name, value):
607
"""Standard D-Bus property Set() method, see D-Bus standard.
608
"""
609
prop = self._get_dbus_property(interface_name, property_name)
610
if prop._dbus_access == u"read":
611
raise DBusPropertyAccessException(property_name)
612
if prop._dbus_get_args_options[u"byte_arrays"]:
613
# The byte_arrays option is not supported yet on
614
# signatures other than "ay".
615
if prop._dbus_signature != u"ay":
616
raise ValueError
617
value = dbus.ByteArray(''.join(unichr(byte)
618
for byte in value))
619
prop(value)
620
621
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
622
out_signature=u"a{sv}")
623
def GetAll(self, interface_name):
624
"""Standard D-Bus property GetAll() method, see D-Bus
625
standard.
626
627
Note: Will not include properties with access="write".
628
"""
629
all = {}
630
for name, prop in self._get_all_dbus_properties():
631
if (interface_name
632
and interface_name != prop._dbus_interface):
633
# Interface non-empty but did not match
634
continue
635
# Ignore write-only properties
636
if prop._dbus_access == u"write":
637
continue
638
value = prop()
639
if not hasattr(value, u"variant_level"):
640
all[name] = value
641
continue
642
all[name] = type(value)(value, variant_level=
643
value.variant_level+1)
644
return dbus.Dictionary(all, signature=u"sv")
645
646
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
647
out_signature=u"s",
648
path_keyword='object_path',
649
connection_keyword='connection')
650
def Introspect(self, object_path, connection):
651
"""Standard D-Bus method, overloaded to insert property tags.
652
"""
653
xmlstring = dbus.service.Object.Introspect(self, object_path,
654
connection)
655
try:
656
document = xml.dom.minidom.parseString(xmlstring)
657
def make_tag(document, name, prop):
658
e = document.createElement(u"property")
659
e.setAttribute(u"name", name)
660
e.setAttribute(u"type", prop._dbus_signature)
661
e.setAttribute(u"access", prop._dbus_access)
662
return e
663
for if_tag in document.getElementsByTagName(u"interface"):
664
for tag in (make_tag(document, name, prop)
665
for name, prop
666
in self._get_all_dbus_properties()
667
if prop._dbus_interface
668
== if_tag.getAttribute(u"name")):
669
if_tag.appendChild(tag)
670
# Add the names to the return values for the
671
# "org.freedesktop.DBus.Properties" methods
672
if (if_tag.getAttribute(u"name")
673
== u"org.freedesktop.DBus.Properties"):
674
for cn in if_tag.getElementsByTagName(u"method"):
675
if cn.getAttribute(u"name") == u"Get":
676
for arg in cn.getElementsByTagName(u"arg"):
677
if (arg.getAttribute(u"direction")
678
== u"out"):
679
arg.setAttribute(u"name", u"value")
680
elif cn.getAttribute(u"name") == u"GetAll":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"props")
685
xmlstring = document.toxml(u"utf-8")
686
document.unlink()
687
except (AttributeError, xml.dom.DOMException,
688
xml.parsers.expat.ExpatError), error:
689
logger.error(u"Failed to override Introspection method",
690
error)
691
return xmlstring
692
693
694
class ClientDBus(Client, DBusObjectWithProperties):
695
"""A Client class using D-Bus
696
697
Attributes:
698
dbus_object_path: dbus.ObjectPath
699
bus: dbus.SystemBus()
700
"""
701
# dbus.service.Object doesn't use super(), so we can't either.
702
703
def __init__(self, bus = None, *args, **kwargs):
704
self._approvals_pending = 0
705
self.bus = bus
706
Client.__init__(self, *args, **kwargs)
707
# Only now, when this client is initialized, can it show up on
708
# the D-Bus
709
self.dbus_object_path = (dbus.ObjectPath
710
(u"/clients/"
711
+ self.name.replace(u".", u"_")))
712
DBusObjectWithProperties.__init__(self, self.bus,
713
self.dbus_object_path)
714
715
def _get_approvals_pending(self):
716
return self._approvals_pending
717
def _set_approvals_pending(self, value):
718
old_value = self._approvals_pending
719
self._approvals_pending = value
720
bval = bool(value)
721
if (hasattr(self, "dbus_object_path")
722
and bval is not bool(old_value)):
723
dbus_bool = dbus.Boolean(bval, variant_level=1)
724
self.PropertyChanged(dbus.String(u"approved_pending"),
725
dbus_bool)
726
727
approvals_pending = property(_get_approvals_pending,
728
_set_approvals_pending)
729
del _get_approvals_pending, _set_approvals_pending
730
731
@staticmethod
732
def _datetime_to_dbus(dt, variant_level=0):
733
"""Convert a UTC datetime.datetime() to a D-Bus type."""
734
return dbus.String(dt.isoformat(),
735
variant_level=variant_level)
736
737
def enable(self):
738
oldstate = getattr(self, u"enabled", False)
739
r = Client.enable(self)
740
if oldstate != self.enabled:
741
# Emit D-Bus signals
742
self.PropertyChanged(dbus.String(u"enabled"),
743
dbus.Boolean(True, variant_level=1))
744
self.PropertyChanged(
745
dbus.String(u"last_enabled"),
746
self._datetime_to_dbus(self.last_enabled,
747
variant_level=1))
748
return r
749
750
def disable(self, quiet = False):
751
oldstate = getattr(self, u"enabled", False)
752
r = Client.disable(self, quiet=quiet)
753
if not quiet and oldstate != self.enabled:
754
# Emit D-Bus signal
755
self.PropertyChanged(dbus.String(u"enabled"),
756
dbus.Boolean(False, variant_level=1))
757
return r
758
759
def __del__(self, *args, **kwargs):
760
try:
761
self.remove_from_connection()
762
except LookupError:
763
pass
764
if hasattr(DBusObjectWithProperties, u"__del__"):
765
DBusObjectWithProperties.__del__(self, *args, **kwargs)
766
Client.__del__(self, *args, **kwargs)
767
768
def checker_callback(self, pid, condition, command,
769
*args, **kwargs):
770
self.checker_callback_tag = None
771
self.checker = None
772
# Emit D-Bus signal
773
self.PropertyChanged(dbus.String(u"checker_running"),
774
dbus.Boolean(False, variant_level=1))
775
if os.WIFEXITED(condition):
776
exitstatus = os.WEXITSTATUS(condition)
777
# Emit D-Bus signal
778
self.CheckerCompleted(dbus.Int16(exitstatus),
779
dbus.Int64(condition),
780
dbus.String(command))
781
else:
782
# Emit D-Bus signal
783
self.CheckerCompleted(dbus.Int16(-1),
784
dbus.Int64(condition),
785
dbus.String(command))
786
787
return Client.checker_callback(self, pid, condition, command,
788
*args, **kwargs)
789
790
def checked_ok(self, *args, **kwargs):
791
r = Client.checked_ok(self, *args, **kwargs)
792
# Emit D-Bus signal
793
self.PropertyChanged(
794
dbus.String(u"last_checked_ok"),
795
(self._datetime_to_dbus(self.last_checked_ok,
796
variant_level=1)))
797
return r
798
799
def start_checker(self, *args, **kwargs):
800
old_checker = self.checker
801
if self.checker is not None:
802
old_checker_pid = self.checker.pid
803
else:
804
old_checker_pid = None
805
r = Client.start_checker(self, *args, **kwargs)
806
# Only if new checker process was started
807
if (self.checker is not None
808
and old_checker_pid != self.checker.pid):
809
# Emit D-Bus signal
810
self.CheckerStarted(self.current_checker_command)
811
self.PropertyChanged(
812
dbus.String(u"checker_running"),
813
dbus.Boolean(True, variant_level=1))
814
return r
815
816
def stop_checker(self, *args, **kwargs):
817
old_checker = getattr(self, u"checker", None)
818
r = Client.stop_checker(self, *args, **kwargs)
819
if (old_checker is not None
820
and getattr(self, u"checker", None) is None):
821
self.PropertyChanged(dbus.String(u"checker_running"),
822
dbus.Boolean(False, variant_level=1))
823
return r
824
825
def _reset_approved(self):
826
self._approved = None
827
return False
828
829
def approve(self, value=True):
830
self.send_changedstate()
831
self._approved = value
832
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
833
self._reset_approved)
834
835
836
## D-Bus methods, signals & properties
837
_interface = u"se.bsnet.fukt.Mandos.Client"
838
839
## Signals
840
841
# CheckerCompleted - signal
842
@dbus.service.signal(_interface, signature=u"nxs")
843
def CheckerCompleted(self, exitcode, waitstatus, command):
844
"D-Bus signal"
845
pass
846
847
# CheckerStarted - signal
848
@dbus.service.signal(_interface, signature=u"s")
849
def CheckerStarted(self, command):
850
"D-Bus signal"
851
pass
852
853
# PropertyChanged - signal
854
@dbus.service.signal(_interface, signature=u"sv")
855
def PropertyChanged(self, property, value):
856
"D-Bus signal"
857
pass
858
859
# GotSecret - signal
860
@dbus.service.signal(_interface)
861
def GotSecret(self):
862
"""D-Bus signal
863
Is sent after a successful transfer of secret from the Mandos
864
server to mandos-client
865
"""
866
pass
867
868
# Rejected - signal
869
@dbus.service.signal(_interface, signature=u"s")
870
def Rejected(self, reason):
871
"D-Bus signal"
872
pass
873
874
# NeedApproval - signal
875
@dbus.service.signal(_interface, signature=u"db")
876
def NeedApproval(self, timeout, default):
877
"D-Bus signal"
878
pass
879
880
## Methods
881
882
# Approve - method
883
@dbus.service.method(_interface, in_signature=u"b")
884
def Approve(self, value):
885
self.approve(value)
886
887
# CheckedOK - method
888
@dbus.service.method(_interface)
889
def CheckedOK(self):
890
return self.checked_ok()
891
892
# Enable - method
893
@dbus.service.method(_interface)
894
def Enable(self):
895
"D-Bus method"
896
self.enable()
897
898
# StartChecker - method
899
@dbus.service.method(_interface)
900
def StartChecker(self):
901
"D-Bus method"
902
self.start_checker()
903
904
# Disable - method
905
@dbus.service.method(_interface)
906
def Disable(self):
907
"D-Bus method"
908
self.disable()
909
910
# StopChecker - method
911
@dbus.service.method(_interface)
912
def StopChecker(self):
913
self.stop_checker()
914
915
## Properties
916
917
# approved_pending - property
918
@dbus_service_property(_interface, signature=u"b", access=u"read")
919
def approved_pending_dbus_property(self):
920
return dbus.Boolean(bool(self.approvals_pending))
921
922
# approved_by_default - property
923
@dbus_service_property(_interface, signature=u"b",
924
access=u"readwrite")
925
def approved_by_default_dbus_property(self):
926
return dbus.Boolean(self.approved_by_default)
927
928
# approved_delay - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def approved_delay_dbus_property(self):
932
return dbus.UInt64(self.approved_delay_milliseconds())
933
934
# approved_duration - property
935
@dbus_service_property(_interface, signature=u"t",
936
access=u"readwrite")
937
def approved_duration_dbus_property(self):
938
return dbus.UInt64(self._timedelta_to_milliseconds(
939
self.approved_duration))
940
941
# name - property
942
@dbus_service_property(_interface, signature=u"s", access=u"read")
943
def name_dbus_property(self):
944
return dbus.String(self.name)
945
946
# fingerprint - property
947
@dbus_service_property(_interface, signature=u"s", access=u"read")
948
def fingerprint_dbus_property(self):
949
return dbus.String(self.fingerprint)
950
951
# host - property
952
@dbus_service_property(_interface, signature=u"s",
953
access=u"readwrite")
954
def host_dbus_property(self, value=None):
955
if value is None: # get
956
return dbus.String(self.host)
957
self.host = value
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"host"),
960
dbus.String(value, variant_level=1))
961
962
# created - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def created_dbus_property(self):
965
return dbus.String(self._datetime_to_dbus(self.created))
966
967
# last_enabled - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def last_enabled_dbus_property(self):
970
if self.last_enabled is None:
971
return dbus.String(u"")
972
return dbus.String(self._datetime_to_dbus(self.last_enabled))
973
974
# enabled - property
975
@dbus_service_property(_interface, signature=u"b",
976
access=u"readwrite")
977
def enabled_dbus_property(self, value=None):
978
if value is None: # get
979
return dbus.Boolean(self.enabled)
980
if value:
981
self.enable()
982
else:
983
self.disable()
984
985
# last_checked_ok - property
986
@dbus_service_property(_interface, signature=u"s",
987
access=u"readwrite")
988
def last_checked_ok_dbus_property(self, value=None):
989
if value is not None:
990
self.checked_ok()
991
return
375
def still_valid(self):
376
"""Has the timeout not yet passed for this client?"""
377
now = datetime.datetime.now()
992
378
if self.last_checked_ok is None:
993
return dbus.String(u"")
994
return dbus.String(self._datetime_to_dbus(self
995
.last_checked_ok))
996
997
# timeout - property
998
@dbus_service_property(_interface, signature=u"t",
999
access=u"readwrite")
1000
def timeout_dbus_property(self, value=None):
1001
if value is None: # get
1002
return dbus.UInt64(self.timeout_milliseconds())
1003
self.timeout = datetime.timedelta(0, 0, 0, value)
1004
# Emit D-Bus signal
1005
self.PropertyChanged(dbus.String(u"timeout"),
1006
dbus.UInt64(value, variant_level=1))
1007
if getattr(self, u"disable_initiator_tag", None) is None:
1008
return
1009
# Reschedule timeout
1010
gobject.source_remove(self.disable_initiator_tag)
1011
self.disable_initiator_tag = None
1012
time_to_die = (self.
1013
_timedelta_to_milliseconds((self
1014
.last_checked_ok
1015
+ self.timeout)
1016
- datetime.datetime
1017
.utcnow()))
1018
if time_to_die <= 0:
1019
# The timeout has passed
1020
self.disable()
1021
else:
1022
self.disable_initiator_tag = (gobject.timeout_add
1023
(time_to_die, self.disable))
1024
1025
# interval - property
1026
@dbus_service_property(_interface, signature=u"t",
1027
access=u"readwrite")
1028
def interval_dbus_property(self, value=None):
1029
if value is None: # get
1030
return dbus.UInt64(self.interval_milliseconds())
1031
self.interval = datetime.timedelta(0, 0, 0, value)
1032
# Emit D-Bus signal
1033
self.PropertyChanged(dbus.String(u"interval"),
1034
dbus.UInt64(value, variant_level=1))
1035
if getattr(self, u"checker_initiator_tag", None) is None:
1036
return
1037
# Reschedule checker run
1038
gobject.source_remove(self.checker_initiator_tag)
1039
self.checker_initiator_tag = (gobject.timeout_add
1040
(value, self.start_checker))
1041
self.start_checker() # Start one now, too
1042
1043
# checker - property
1044
@dbus_service_property(_interface, signature=u"s",
1045
access=u"readwrite")
1046
def checker_dbus_property(self, value=None):
1047
if value is None: # get
1048
return dbus.String(self.checker_command)
1049
self.checker_command = value
1050
# Emit D-Bus signal
1051
self.PropertyChanged(dbus.String(u"checker"),
1052
dbus.String(self.checker_command,
1053
variant_level=1))
1054
1055
# checker_running - property
1056
@dbus_service_property(_interface, signature=u"b",
1057
access=u"readwrite")
1058
def checker_running_dbus_property(self, value=None):
1059
if value is None: # get
1060
return dbus.Boolean(self.checker is not None)
1061
if value:
1062
self.start_checker()
1063
else:
1064
self.stop_checker()
1065
1066
# object_path - property
1067
@dbus_service_property(_interface, signature=u"o", access=u"read")
1068
def object_path_dbus_property(self):
1069
return self.dbus_object_path # is already a dbus.ObjectPath
1070
1071
# secret = property
1072
@dbus_service_property(_interface, signature=u"ay",
1073
access=u"write", byte_arrays=True)
1074
def secret_dbus_property(self, value):
1075
self.secret = str(value)
1076
1077
del _interface
1078
1079
1080
class ProxyClient(object):
1081
def __init__(self, child_pipe, fpr, address):
1082
self._pipe = child_pipe
1083
self._pipe.send(('init', fpr, address))
1084
if not self._pipe.recv():
1085
raise KeyError()
1086
1087
def __getattribute__(self, name):
1088
if(name == '_pipe'):
1089
return super(ProxyClient, self).__getattribute__(name)
1090
self._pipe.send(('getattr', name))
1091
data = self._pipe.recv()
1092
if data[0] == 'data':
1093
return data[1]
1094
if data[0] == 'function':
1095
def func(*args, **kwargs):
1096
self._pipe.send(('funcall', name, args, kwargs))
1097
return self._pipe.recv()[1]
1098
return func
1099
1100
def __setattr__(self, name, value):
1101
if(name == '_pipe'):
1102
return super(ProxyClient, self).__setattr__(name, value)
1103
self._pipe.send(('setattr', name, value))
1104
1105
1106
class ClientHandler(socketserver.BaseRequestHandler, object):
1107
"""A class to handle client connections.
1108
1109
Instantiated once for each connection to handle it.
379
return now < (self.created + self.timeout)
380
else:
381
return now < (self.last_checked_ok + self.timeout)
382
383
384
def peer_certificate(session):
385
"Return the peer's OpenPGP certificate as a bytestring"
386
# If not an OpenPGP certificate...
387
if gnutls.library.functions.gnutls_certificate_type_get\
388
(session._c_object) \
389
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
390
# ...do the normal thing
391
return session.peer_certificate
392
list_size = ctypes.c_uint()
393
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
394
(session._c_object, ctypes.byref(list_size))
395
if list_size.value == 0:
396
return None
397
cert = cert_list[0]
398
return ctypes.string_at(cert.data, cert.size)
399
400
401
def fingerprint(openpgp):
402
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# New empty GnuTLS certificate
409
crt = gnutls.library.types.gnutls_openpgp_crt_t()
410
gnutls.library.functions.gnutls_openpgp_crt_init\
411
(ctypes.byref(crt))
412
# Import the OpenPGP public key into the certificate
413
gnutls.library.functions.gnutls_openpgp_crt_import\
414
(crt, ctypes.byref(datum),
415
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
416
# Verify the self signature in the key
417
crtverify = ctypes.c_uint();
418
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
419
(crt, 0, ctypes.byref(crtverify))
420
if crtverify.value != 0:
421
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
422
raise gnutls.errors.CertificateSecurityError("Verify failed")
423
# New buffer for the fingerprint
424
buffer = ctypes.create_string_buffer(20)
425
buffer_length = ctypes.c_size_t()
426
# Get the fingerprint from the certificate into the buffer
427
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
428
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
429
# Deinit the certificate
430
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
431
# Convert the buffer to a Python bytestring
432
fpr = ctypes.string_at(buffer, buffer_length.value)
433
# Convert the bytestring to hexadecimal notation
434
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
435
return hex_fpr
436
437
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
439
"""A TCP request handler class.
440
Instantiated by IPv6_TCPServer for each request to handle it.
1110
441
Note: This will run in its own forked process."""
1111
442
1112
443
def handle(self):
1113
with contextlib.closing(self.server.child_pipe) as child_pipe:
1114
logger.info(u"TCP connection from: %s",
1115
unicode(self.client_address))
1116
logger.debug(u"Pipe FD: %d",
1117
self.server.child_pipe.fileno())
1118
1119
session = (gnutls.connection
1120
.ClientSession(self.request,
1121
gnutls.connection
1122
.X509Credentials()))
1123
1124
# Note: gnutls.connection.X509Credentials is really a
1125
# generic GnuTLS certificate credentials object so long as
1126
# no X.509 keys are added to it. Therefore, we can use it
1127
# here despite using OpenPGP certificates.
1128
1129
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1130
# u"+AES-256-CBC", u"+SHA1",
1131
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1132
# u"+DHE-DSS"))
1133
# Use a fallback default, since this MUST be set.
1134
priority = self.server.gnutls_priority
1135
if priority is None:
1136
priority = u"NORMAL"
1137
(gnutls.library.functions
1138
.gnutls_priority_set_direct(session._c_object,
1139
priority, None))
1140
1141
# Start communication using the Mandos protocol
1142
# Get protocol number
1143
line = self.request.makefile().readline()
1144
logger.debug(u"Protocol version: %r", line)
1145
try:
1146
if int(line.strip().split()[0]) > 1:
1147
raise RuntimeError
1148
except (ValueError, IndexError, RuntimeError), error:
1149
logger.error(u"Unknown protocol version: %s", error)
1150
return
1151
1152
# Start GnuTLS connection
1153
try:
1154
session.handshake()
1155
except gnutls.errors.GNUTLSError, error:
1156
logger.warning(u"Handshake failed: %s", error)
1157
# Do not run session.bye() here: the session is not
1158
# established. Just abandon the request.
1159
return
1160
logger.debug(u"Handshake succeeded")
1161
1162
approval_required = False
1163
try:
1164
try:
1165
fpr = self.fingerprint(self.peer_certificate
1166
(session))
1167
except (TypeError, gnutls.errors.GNUTLSError), error:
1168
logger.warning(u"Bad certificate: %s", error)
1169
return
1170
logger.debug(u"Fingerprint: %s", fpr)
1171
1172
try:
1173
client = ProxyClient(child_pipe, fpr,
1174
self.client_address)
1175
except KeyError:
1176
return
1177
1178
if client.approved_delay:
1179
delay = client.approved_delay
1180
client.approvals_pending += 1
1181
approval_required = True
1182
1183
while True:
1184
if not client.enabled:
1185
logger.warning(u"Client %s is disabled",
1186
client.name)
1187
if self.server.use_dbus:
1188
# Emit D-Bus signal
1189
client.Rejected("Disabled")
1190
return
1191
1192
if client._approved or not client.approved_delay:
1193
#We are approved or approval is disabled
1194
break
1195
elif client._approved is None:
1196
logger.info(u"Client %s need approval",
1197
client.name)
1198
if self.server.use_dbus:
1199
# Emit D-Bus signal
1200
client.NeedApproval(
1201
client.approved_delay_milliseconds(),
1202
client.approved_by_default)
1203
else:
1204
logger.warning(u"Client %s was not approved",
1205
client.name)
1206
if self.server.use_dbus:
1207
# Emit D-Bus signal
1208
client.Rejected("Disapproved")
1209
return
1210
1211
#wait until timeout or approved
1212
#x = float(client._timedelta_to_milliseconds(delay))
1213
time = datetime.datetime.now()
1214
client.changedstate.acquire()
1215
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1216
client.changedstate.release()
1217
time2 = datetime.datetime.now()
1218
if (time2 - time) >= delay:
1219
if not client.approved_by_default:
1220
logger.warning("Client %s timed out while"
1221
" waiting for approval",
1222
client.name)
1223
if self.server.use_dbus:
1224
# Emit D-Bus signal
1225
client.Rejected("Time out")
1226
return
1227
else:
1228
break
1229
else:
1230
delay -= time2 - time
1231
1232
sent_size = 0
1233
while sent_size < len(client.secret):
1234
try:
1235
sent = session.send(client.secret[sent_size:])
1236
except (gnutls.errors.GNUTLSError), error:
1237
logger.warning("gnutls send failed")
1238
return
1239
logger.debug(u"Sent: %d, remaining: %d",
1240
sent, len(client.secret)
1241
- (sent_size + sent))
1242
sent_size += sent
1243
1244
logger.info(u"Sending secret to %s", client.name)
1245
# bump the timeout as if seen
1246
client.checked_ok()
1247
if self.server.use_dbus:
1248
# Emit D-Bus signal
1249
client.GotSecret()
1250
1251
finally:
1252
if approval_required:
1253
client.approvals_pending -= 1
1254
try:
1255
session.bye()
1256
except (gnutls.errors.GNUTLSError), error:
1257
logger.warning("gnutls bye failed")
1258
1259
@staticmethod
1260
def peer_certificate(session):
1261
"Return the peer's OpenPGP certificate as a bytestring"
1262
# If not an OpenPGP certificate...
1263
if (gnutls.library.functions
1264
.gnutls_certificate_type_get(session._c_object)
1265
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1266
# ...do the normal thing
1267
return session.peer_certificate
1268
list_size = ctypes.c_uint(1)
1269
cert_list = (gnutls.library.functions
1270
.gnutls_certificate_get_peers
1271
(session._c_object, ctypes.byref(list_size)))
1272
if not bool(cert_list) and list_size.value != 0:
1273
raise gnutls.errors.GNUTLSError(u"error getting peer"
1274
u" certificate")
1275
if list_size.value == 0:
1276
return None
1277
cert = cert_list[0]
1278
return ctypes.string_at(cert.data, cert.size)
1279
1280
@staticmethod
1281
def fingerprint(openpgp):
1282
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1283
# New GnuTLS "datum" with the OpenPGP public key
1284
datum = (gnutls.library.types
1285
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1286
ctypes.POINTER
1287
(ctypes.c_ubyte)),
1288
ctypes.c_uint(len(openpgp))))
1289
# New empty GnuTLS certificate
1290
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1291
(gnutls.library.functions
1292
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1293
# Import the OpenPGP public key into the certificate
1294
(gnutls.library.functions
1295
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1296
gnutls.library.constants
1297
.GNUTLS_OPENPGP_FMT_RAW))
1298
# Verify the self signature in the key
1299
crtverify = ctypes.c_uint()
1300
(gnutls.library.functions
1301
.gnutls_openpgp_crt_verify_self(crt, 0,
1302
ctypes.byref(crtverify)))
1303
if crtverify.value != 0:
1304
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1305
raise (gnutls.errors.CertificateSecurityError
1306
(u"Verify failed"))
1307
# New buffer for the fingerprint
1308
buf = ctypes.create_string_buffer(20)
1309
buf_len = ctypes.c_size_t()
1310
# Get the fingerprint from the certificate into the buffer
1311
(gnutls.library.functions
1312
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1313
ctypes.byref(buf_len)))
1314
# Deinit the certificate
1315
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1316
# Convert the buffer to a Python bytestring
1317
fpr = ctypes.string_at(buf, buf_len.value)
1318
# Convert the bytestring to hexadecimal notation
1319
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1320
return hex_fpr
1321
1322
1323
class MultiprocessingMixIn(object):
1324
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1325
def sub_process_main(self, request, address):
1326
try:
1327
self.finish_request(request, address)
1328
except:
1329
self.handle_error(request, address)
1330
self.close_request(request)
1331
1332
def process_request(self, request, address):
1333
"""Start a new process to process the request."""
1334
multiprocessing.Process(target = self.sub_process_main,
1335
args = (request, address)).start()
1336
1337
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1338
""" adds a pipe to the MixIn """
1339
def process_request(self, request, client_address):
1340
"""Overrides and wraps the original process_request().
1341
1342
This function creates a new pipe in self.pipe
1343
"""
1344
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1345
1346
super(MultiprocessingMixInWithPipe,
1347
self).process_request(request, client_address)
1348
self.child_pipe.close()
1349
self.add_pipe(parent_pipe)
1350
1351
def add_pipe(self, parent_pipe):
1352
"""Dummy function; override as necessary"""
1353
pass
1354
1355
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1356
socketserver.TCPServer, object):
1357
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1358
444
logger.info(u"TCP connection from: %s",
445
unicode(self.client_address))
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
449
line = self.request.makefile().readline()
450
logger.debug(u"Protocol version: %r", line)
451
try:
452
if int(line.strip().split()[0]) > 1:
453
raise RuntimeError
454
except (ValueError, IndexError, RuntimeError), error:
455
logger.error(u"Unknown protocol version: %s", error)
456
return
457
458
# Note: gnutls.connection.X509Credentials is really a generic
459
# GnuTLS certificate credentials object so long as no X.509
460
# keys are added to it. Therefore, we can use it here despite
461
# using OpenPGP certificates.
462
463
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
464
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
465
# "+DHE-DSS"))
466
priority = "NORMAL" # Fallback default, since this
467
# MUST be set.
468
if self.server.settings["priority"]:
469
priority = self.server.settings["priority"]
470
gnutls.library.functions.gnutls_priority_set_direct\
471
(session._c_object, priority, None);
472
473
try:
474
session.handshake()
475
except gnutls.errors.GNUTLSError, error:
476
logger.warning(u"Handshake failed: %s", error)
477
# Do not run session.bye() here: the session is not
478
# established. Just abandon the request.
479
return
480
try:
481
fpr = fingerprint(peer_certificate(session))
482
except (TypeError, gnutls.errors.GNUTLSError), error:
483
logger.warning(u"Bad certificate: %s", error)
484
session.bye()
485
return
486
logger.debug(u"Fingerprint: %s", fpr)
487
client = None
488
for c in self.server.clients:
489
if c.fingerprint == fpr:
490
client = c
491
break
492
if not client:
493
logger.warning(u"Client not found for fingerprint: %s",
494
fpr)
495
session.bye()
496
return
497
# Have to check if client.still_valid(), since it is possible
498
# that the client timed out while establishing the GnuTLS
499
# session.
500
if not client.still_valid():
501
logger.warning(u"Client %(name)s is invalid",
502
vars(client))
503
session.bye()
504
return
505
sent_size = 0
506
while sent_size < len(client.secret):
507
sent = session.send(client.secret[sent_size:])
508
logger.debug(u"Sent: %d, remaining: %d",
509
sent, len(client.secret)
510
- (sent_size + sent))
511
sent_size += sent
512
session.bye()
513
514
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
516
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1359
517
Attributes:
1360
enabled: Boolean; whether this server is activated yet
1361
interface: None or a network interface name (string)
1362
use_ipv6: Boolean; to use IPv6 or not
518
settings: Server settings
519
clients: Set() of Client objects
1363
520
"""
1364
def __init__(self, server_address, RequestHandlerClass,
1365
interface=None, use_ipv6=True):
1366
self.interface = interface
1367
if use_ipv6:
1368
self.address_family = socket.AF_INET6
1369
socketserver.TCPServer.__init__(self, server_address,
1370
RequestHandlerClass)
521
address_family = socket.AF_INET6
522
def __init__(self, *args, **kwargs):
523
if "settings" in kwargs:
524
self.settings = kwargs["settings"]
525
del kwargs["settings"]
526
if "clients" in kwargs:
527
self.clients = kwargs["clients"]
528
del kwargs["clients"]
529
return super(type(self), self).__init__(*args, **kwargs)
1371
530
def server_bind(self):
1372
531
"""This overrides the normal server_bind() function
1373
532
to bind to an interface if one was specified, and also NOT to
1374
533
bind to an address or port if they were not specified."""
1375
if self.interface is not None:
1376
if SO_BINDTODEVICE is None:
1377
logger.error(u"SO_BINDTODEVICE does not exist;"
1378
u" cannot bind to interface %s",
1379
self.interface)
1380
else:
1381
try:
1382
self.socket.setsockopt(socket.SOL_SOCKET,
1383
SO_BINDTODEVICE,
1384
str(self.interface
1385
+ u'\0'))
1386
except socket.error, error:
1387
if error[0] == errno.EPERM:
1388
logger.error(u"No permission to"
1389
u" bind to interface %s",
1390
self.interface)
1391
elif error[0] == errno.ENOPROTOOPT:
1392
logger.error(u"SO_BINDTODEVICE not available;"
1393
u" cannot bind to interface %s",
1394
self.interface)
1395
else:
1396
raise
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
537
try:
538
self.socket.setsockopt(socket.SOL_SOCKET,
539
SO_BINDTODEVICE,
540
self.settings["interface"])
541
except socket.error, error:
542
if error[0] == errno.EPERM:
543
logger.error(u"No permission to"
544
u" bind to interface %s",
545
self.settings["interface"])
546
else:
547
raise error
1397
548
# Only bind(2) the socket if we really need to.
1398
549
if self.server_address[0] or self.server_address[1]:
1399
550
if not self.server_address[0]:
1400
if self.address_family == socket.AF_INET6:
1401
any_address = u"::" # in6addr_any
1402
else:
1403
any_address = socket.INADDR_ANY
1404
self.server_address = (any_address,
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
1405
553
self.server_address[1])
1406
554
elif not self.server_address[1]:
1407
555
self.server_address = (self.server_address[0],
1408
556
0)
1409
# if self.interface:
557
# if self.settings["interface"]:
1410
558
# self.server_address = (self.server_address[0],
1411
559
# 0, # port
1412
560
# 0, # flowinfo
1413
561
# if_nametoindex
1414
# (self.interface))
1415
return socketserver.TCPServer.server_bind(self)
1416
1417
1418
class MandosServer(IPv6_TCPServer):
1419
"""Mandos server.
1420
1421
Attributes:
1422
clients: set of Client objects
1423
gnutls_priority GnuTLS priority string
1424
use_dbus: Boolean; to emit D-Bus signals or not
1425
1426
Assumes a gobject.MainLoop event loop.
1427
"""
1428
def __init__(self, server_address, RequestHandlerClass,
1429
interface=None, use_ipv6=True, clients=None,
1430
gnutls_priority=None, use_dbus=True):
1431
self.enabled = False
1432
self.clients = clients
1433
if self.clients is None:
1434
self.clients = set()
1435
self.use_dbus = use_dbus
1436
self.gnutls_priority = gnutls_priority
1437
IPv6_TCPServer.__init__(self, server_address,
1438
RequestHandlerClass,
1439
interface = interface,
1440
use_ipv6 = use_ipv6)
1441
def server_activate(self):
1442
if self.enabled:
1443
return socketserver.TCPServer.server_activate(self)
1444
def enable(self):
1445
self.enabled = True
1446
def add_pipe(self, parent_pipe):
1447
# Call "handle_ipc" for both data and EOF events
1448
gobject.io_add_watch(parent_pipe.fileno(),
1449
gobject.IO_IN | gobject.IO_HUP,
1450
functools.partial(self.handle_ipc,
1451
parent_pipe = parent_pipe))
1452
1453
def handle_ipc(self, source, condition, parent_pipe=None,
1454
client_object=None):
1455
condition_names = {
1456
gobject.IO_IN: u"IN", # There is data to read.
1457
gobject.IO_OUT: u"OUT", # Data can be written (without
1458
# blocking).
1459
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1460
gobject.IO_ERR: u"ERR", # Error condition.
1461
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1462
# broken, usually for pipes and
1463
# sockets).
1464
}
1465
conditions_string = ' | '.join(name
1466
for cond, name in
1467
condition_names.iteritems()
1468
if cond & condition)
1469
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1470
conditions_string)
1471
1472
# error or the other end of multiprocessing.Pipe has closed
1473
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1474
return False
1475
1476
# Read a request from the child
1477
request = parent_pipe.recv()
1478
logger.debug(u"IPC request: %s", repr(request))
1479
command = request[0]
1480
1481
if command == 'init':
1482
fpr = request[1]
1483
address = request[2]
1484
1485
for c in self.clients:
1486
if c.fingerprint == fpr:
1487
client = c
1488
break
1489
else:
1490
logger.warning(u"Client not found for fingerprint: %s, ad"
1491
u"dress: %s", fpr, address)
1492
if self.use_dbus:
1493
# Emit D-Bus signal
1494
mandos_dbus_service.ClientNotFound(fpr, address)
1495
parent_pipe.send(False)
1496
return False
1497
1498
gobject.io_add_watch(parent_pipe.fileno(),
1499
gobject.IO_IN | gobject.IO_HUP,
1500
functools.partial(self.handle_ipc,
1501
parent_pipe = parent_pipe,
1502
client_object = client))
1503
parent_pipe.send(True)
1504
# remove the old hook in favor of the new above hook on same fileno
1505
return False
1506
if command == 'funcall':
1507
funcname = request[1]
1508
args = request[2]
1509
kwargs = request[3]
1510
1511
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1512
1513
if command == 'getattr':
1514
attrname = request[1]
1515
if callable(client_object.__getattribute__(attrname)):
1516
parent_pipe.send(('function',))
1517
else:
1518
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1519
1520
if command == 'setattr':
1521
attrname = request[1]
1522
value = request[2]
1523
setattr(client_object, attrname, value)
1524
1525
return True
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
1526
565
1527
566
1528
567
def string_to_delta(interval):
1529
568
"""Parse a string and return a datetime.timedelta
1530
1531
>>> string_to_delta(u'7d')
569
570
>>> string_to_delta('7d')
1532
571
datetime.timedelta(7)
1533
>>> string_to_delta(u'60s')
572
>>> string_to_delta('60s')
1534
573
datetime.timedelta(0, 60)
1535
>>> string_to_delta(u'60m')
574
>>> string_to_delta('60m')
1536
575
datetime.timedelta(0, 3600)
1537
>>> string_to_delta(u'24h')
576
>>> string_to_delta('24h')
1538
577
datetime.timedelta(1)
1539
578
>>> string_to_delta(u'1w')
1540
579
datetime.timedelta(7)
1541
>>> string_to_delta(u'5m 30s')
580
>>> string_to_delta('5m 30s')
1542
581
datetime.timedelta(0, 330)
1543
582
"""
1544
583
timevalue = datetime.timedelta(0)
1545
584
for s in interval.split():
1546
585
try:
1547
suffix = unicode(s[-1])
1548
value = int(s[:-1])
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
1549
588
if suffix == u"d":
1550
589
delta = datetime.timedelta(value)
1551
590
elif suffix == u"s":
1557
596
elif suffix == u"w":
1558
597
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1559
598
else:
1560
raise ValueError(u"Unknown suffix %r" % suffix)
1561
except (ValueError, IndexError), e:
1562
raise ValueError(e.message)
599
raise ValueError
600
except (ValueError, IndexError):
601
raise ValueError
1563
602
timevalue += delta
1564
603
return timevalue
1565
604
1566
605
606
def server_state_changed(state):
607
"""Derived from the Avahi example code"""
608
if state == avahi.SERVER_COLLISION:
609
logger.error(u"Zeroconf server name collision")
610
service.remove()
611
elif state == avahi.SERVER_RUNNING:
612
service.add()
613
614
615
def entry_group_state_changed(state, error):
616
"""Derived from the Avahi example code"""
617
logger.debug(u"Avahi state change: %i", state)
618
619
if state == avahi.ENTRY_GROUP_ESTABLISHED:
620
logger.debug(u"Zeroconf service established.")
621
elif state == avahi.ENTRY_GROUP_COLLISION:
622
logger.warning(u"Zeroconf service name collision.")
623
service.rename()
624
elif state == avahi.ENTRY_GROUP_FAILURE:
625
logger.critical(u"Avahi: Error in group state changed %s",
626
unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
628
1567
629
def if_nametoindex(interface):
1568
"""Call the C function if_nametoindex(), or equivalent
1569
1570
Note: This function cannot accept a unicode string."""
630
"""Call the C function if_nametoindex(), or equivalent"""
1571
631
global if_nametoindex
1572
632
try:
1573
if_nametoindex = (ctypes.cdll.LoadLibrary
1574
(ctypes.util.find_library(u"c"))
1575
.if_nametoindex)
633
if "ctypes.util" not in sys.modules:
634
import ctypes.util
635
if_nametoindex = ctypes.cdll.LoadLibrary\
636
(ctypes.util.find_library("c")).if_nametoindex
1576
637
except (OSError, AttributeError):
1577
logger.warning(u"Doing if_nametoindex the hard way")
638
if "struct" not in sys.modules:
639
import struct
640
if "fcntl" not in sys.modules:
641
import fcntl
1578
642
def if_nametoindex(interface):
1579
643
"Get an interface index the hard way, i.e. using fcntl()"
1580
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1581
with contextlib.closing(socket.socket()) as s:
1582
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1583
struct.pack(str(u"16s16x"),
1584
interface))
1585
interface_index = struct.unpack(str(u"I"),
1586
ifreq[16:20])[0]
645
s = socket.socket()
646
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
647
struct.pack("16s16x", interface))
648
s.close()
649
interface_index = struct.unpack("I", ifreq[16:20])[0]
1587
650
return interface_index
1588
651
return if_nametoindex(interface)
1589
652
1590
653
1591
654
def daemon(nochdir = False, noclose = False):
1592
655
"""See daemon(3). Standard BSD Unix function.
1593
1594
656
This should really exist as os.daemon, but it doesn't (yet)."""
1595
657
if os.fork():
1596
658
sys.exit()
1597
659
os.setsid()
1598
660
if not nochdir:
1599
os.chdir(u"/")
661
os.chdir("/")
1600
662
if os.fork():
1601
663
sys.exit()
1602
664
if not noclose:
1604
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1605
667
if not stat.S_ISCHR(os.fstat(null).st_mode):
1606
668
raise OSError(errno.ENODEV,
1607
u"%s not a character device"
1608
% os.path.devnull)
669
"/dev/null not a character device")
1609
670
os.dup2(null, sys.stdin.fileno())
1610
671
os.dup2(null, sys.stdout.fileno())
1611
672
os.dup2(null, sys.stderr.fileno())
1614
675
1615
676
1616
677
def main():
1617
1618
##################################################################
1619
# Parsing of options, both command line and config file
1620
1621
parser = optparse.OptionParser(version = "%%prog %s" % version)
1622
parser.add_option("-i", u"--interface", type=u"string",
1623
metavar="IF", help=u"Bind to interface IF")
1624
parser.add_option("-a", u"--address", type=u"string",
1625
help=u"Address to listen for requests on")
1626
parser.add_option("-p", u"--port", type=u"int",
1627
help=u"Port number to receive requests on")
1628
parser.add_option("--check", action=u"store_true",
1629
help=u"Run self-test")
1630
parser.add_option("--debug", action=u"store_true",
1631
help=u"Debug mode; run in foreground and log to"
1632
u" terminal")
1633
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1634
help=u"Debug level for stdout output")
1635
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1636
u" priority string (see GnuTLS documentation)")
1637
parser.add_option("--servicename", type=u"string",
1638
metavar=u"NAME", help=u"Zeroconf service name")
1639
parser.add_option("--configdir", type=u"string",
1640
default=u"/etc/mandos", metavar=u"DIR",
1641
help=u"Directory to search for configuration"
1642
u" files")
1643
parser.add_option("--no-dbus", action=u"store_false",
1644
dest=u"use_dbus", help=u"Do not provide D-Bus"
1645
u" system bus interface")
1646
parser.add_option("--no-ipv6", action=u"store_false",
1647
dest=u"use_ipv6", help=u"Do not use IPv6")
1648
options = parser.parse_args()[0]
678
global main_loop_started
679
main_loop_started = False
680
681
parser = OptionParser(version = "%%prog %s" % version)
682
parser.add_option("-i", "--interface", type="string",
683
metavar="IF", help="Bind to interface IF")
684
parser.add_option("-a", "--address", type="string",
685
help="Address to listen for requests on")
686
parser.add_option("-p", "--port", type="int",
687
help="Port number to receive requests on")
688
parser.add_option("--check", action="store_true", default=False,
689
help="Run self-test")
690
parser.add_option("--debug", action="store_true",
691
help="Debug mode; run in foreground and log to"
692
" terminal")
693
parser.add_option("--priority", type="string", help="GnuTLS"
694
" priority string (see GnuTLS documentation)")
695
parser.add_option("--servicename", type="string", metavar="NAME",
696
help="Zeroconf service name")
697
parser.add_option("--configdir", type="string",
698
default="/etc/mandos", metavar="DIR",
699
help="Directory to search for configuration"
700
" files")
701
(options, args) = parser.parse_args()
1649
702
1650
703
if options.check:
1651
704
import doctest
1653
706
sys.exit()
1654
707
1655
708
# Default values for config file for server-global settings
1656
server_defaults = { u"interface": u"",
1657
u"address": u"",
1658
u"port": u"",
1659
u"debug": u"False",
1660
u"priority":
1661
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1662
u"servicename": u"Mandos",
1663
u"use_dbus": u"True",
1664
u"use_ipv6": u"True",
1665
u"debuglevel": u"",
709
server_defaults = { "interface": "",
710
"address": "",
711
"port": "",
712
"debug": "False",
713
"priority":
714
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
715
"servicename": "Mandos",
1666
716
}
1667
717
1668
718
# Parse config file for server-global settings
1669
server_config = configparser.SafeConfigParser(server_defaults)
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
1670
720
del server_defaults
1671
server_config.read(os.path.join(options.configdir,
1672
u"mandos.conf"))
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1673
722
# Convert the SafeConfigParser object to a dict
1674
723
server_settings = server_config.defaults()
1675
# Use the appropriate methods on the non-string config options
1676
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1677
server_settings[option] = server_config.getboolean(u"DEFAULT",
1678
option)
1679
if server_settings["port"]:
1680
server_settings["port"] = server_config.getint(u"DEFAULT",
1681
u"port")
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
1682
727
del server_config
1683
728
1684
729
# Override the settings from the config file with command line
1685
730
# options, if set.
1686
for option in (u"interface", u"address", u"port", u"debug",
1687
u"priority", u"servicename", u"configdir",
1688
u"use_dbus", u"use_ipv6", u"debuglevel"):
731
for option in ("interface", "address", "port", "debug",
732
"priority", "servicename", "configdir"):
1689
733
value = getattr(options, option)
1690
734
if value is not None:
1691
735
server_settings[option] = value
1692
736
del options
1693
# Force all strings to be unicode
1694
for option in server_settings.keys():
1695
if type(server_settings[option]) is str:
1696
server_settings[option] = unicode(server_settings[option])
1697
737
# Now we have our good server settings in "server_settings"
1698
738
1699
##################################################################
1700
1701
# For convenience
1702
debug = server_settings[u"debug"]
1703
debuglevel = server_settings[u"debuglevel"]
1704
use_dbus = server_settings[u"use_dbus"]
1705
use_ipv6 = server_settings[u"use_ipv6"]
1706
1707
if server_settings[u"servicename"] != u"Mandos":
1708
syslogger.setFormatter(logging.Formatter
1709
(u'Mandos (%s) [%%(process)d]:'
1710
u' %%(levelname)s: %%(message)s'
1711
% server_settings[u"servicename"]))
1712
1713
# Parse config file with clients
1714
client_defaults = { u"timeout": u"1h",
1715
u"interval": u"5m",
1716
u"checker": u"fping -q -- %%(host)s",
1717
u"host": u"",
1718
u"approved_delay": u"0s",
1719
u"approved_duration": u"1s",
1720
}
1721
client_config = configparser.SafeConfigParser(client_defaults)
1722
client_config.read(os.path.join(server_settings[u"configdir"],
1723
u"clients.conf"))
1724
1725
global mandos_dbus_service
1726
mandos_dbus_service = None
1727
1728
tcp_server = MandosServer((server_settings[u"address"],
1729
server_settings[u"port"]),
1730
ClientHandler,
1731
interface=server_settings[u"interface"],
1732
use_ipv6=use_ipv6,
1733
gnutls_priority=
1734
server_settings[u"priority"],
1735
use_dbus=use_dbus)
1736
pidfilename = u"/var/run/mandos.pid"
1737
try:
1738
pidfile = open(pidfilename, u"w")
1739
except IOError:
1740
logger.error(u"Could not open file %r", pidfilename)
1741
1742
try:
1743
uid = pwd.getpwnam(u"_mandos").pw_uid
1744
gid = pwd.getpwnam(u"_mandos").pw_gid
1745
except KeyError:
1746
try:
1747
uid = pwd.getpwnam(u"mandos").pw_uid
1748
gid = pwd.getpwnam(u"mandos").pw_gid
1749
except KeyError:
1750
try:
1751
uid = pwd.getpwnam(u"nobody").pw_uid
1752
gid = pwd.getpwnam(u"nobody").pw_gid
1753
except KeyError:
1754
uid = 65534
1755
gid = 65534
1756
try:
1757
os.setgid(gid)
1758
os.setuid(uid)
1759
except OSError, error:
1760
if error[0] != errno.EPERM:
1761
raise error
1762
1763
# Enable all possible GnuTLS debugging
1764
1765
1766
if not debug and not debuglevel:
739
debug = server_settings["debug"]
740
741
if not debug:
1767
742
syslogger.setLevel(logging.WARNING)
1768
743
console.setLevel(logging.WARNING)
1769
if debuglevel:
1770
level = getattr(logging, debuglevel.upper())
1771
syslogger.setLevel(level)
1772
console.setLevel(level)
1773
1774
if debug:
1775
# "Use a log level over 10 to enable all debugging options."
1776
# - GnuTLS manual
1777
gnutls.library.functions.gnutls_global_set_log_level(11)
1778
1779
@gnutls.library.types.gnutls_log_func
1780
def debug_gnutls(level, string):
1781
logger.debug(u"GnuTLS: %s", string[:-1])
1782
1783
(gnutls.library.functions
1784
.gnutls_global_set_log_function(debug_gnutls))
1785
1786
# Redirect stdin so all checkers get /dev/null
1787
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1788
os.dup2(null, sys.stdin.fileno())
1789
if null > 2:
1790
os.close(null)
1791
else:
1792
# No console logging
1793
logger.removeHandler(console)
1794
744
745
if server_settings["servicename"] != "Mandos":
746
syslogger.setFormatter(logging.Formatter\
747
('Mandos (%s): %%(levelname)s:'
748
' %%(message)s'
749
% server_settings["servicename"]))
750
751
# Parse config file with clients
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
755
"host": "",
756
}
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
758
client_config.read(os.path.join(server_settings["configdir"],
759
"clients.conf"))
760
761
global service
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
764
if server_settings["interface"]:
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
1795
767
1796
768
global main_loop
769
global bus
770
global server
1797
771
# From the Avahi example code
1798
772
DBusGMainLoop(set_as_default=True )
1799
773
main_loop = gobject.MainLoop()
1800
774
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
1801
778
# End of Avahi example code
1802
if use_dbus:
1803
try:
1804
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1805
bus, do_not_queue=True)
1806
except dbus.exceptions.NameExistsException, e:
1807
logger.error(unicode(e) + u", disabling D-Bus")
1808
use_dbus = False
1809
server_settings[u"use_dbus"] = False
1810
tcp_server.use_dbus = False
1811
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1812
service = AvahiService(name = server_settings[u"servicename"],
1813
servicetype = u"_mandos._tcp",
1814
protocol = protocol, bus = bus)
1815
if server_settings["interface"]:
1816
service.interface = (if_nametoindex
1817
(str(server_settings[u"interface"])))
1818
1819
if not debug:
779
780
clients = Set()
781
def remove_from_clients(client):
782
clients.remove(client)
783
if not clients:
784
logger.critical(u"No clients left, exiting")
785
sys.exit()
786
787
clients.update(Set(Client(name = section,
788
stop_hook = remove_from_clients,
789
config
790
= dict(client_config.items(section)))
791
for section in client_config.sections()))
792
if not clients:
793
logger.critical(u"No clients defined")
794
sys.exit(1)
795
796
if debug:
797
# Redirect stdin so all checkers get /dev/null
798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
799
os.dup2(null, sys.stdin.fileno())
800
if null > 2:
801
os.close(null)
802
else:
803
# No console logging
804
logger.removeHandler(console)
1820
805
# Close all input and output, do double fork, etc.
1821
806
daemon()
1822
1823
global multiprocessing_manager
1824
multiprocessing_manager = multiprocessing.Manager()
1825
1826
client_class = Client
1827
if use_dbus:
1828
client_class = functools.partial(ClientDBus, bus = bus)
1829
def client_config_items(config, section):
1830
special_settings = {
1831
"approved_by_default":
1832
lambda: config.getboolean(section,
1833
"approved_by_default"),
1834
}
1835
for name, value in config.items(section):
1836
try:
1837
yield (name, special_settings[name]())
1838
except KeyError:
1839
yield (name, value)
1840
1841
tcp_server.clients.update(set(
1842
client_class(name = section,
1843
config= dict(client_config_items(
1844
client_config, section)))
1845
for section in client_config.sections()))
1846
if not tcp_server.clients:
1847
logger.warning(u"No clients defined")
1848
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
1849
810
try:
1850
with pidfile:
1851
pid = os.getpid()
1852
pidfile.write(str(pid) + "\n")
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
1853
814
del pidfile
1854
except IOError:
1855
logger.error(u"Could not write to file %r with PID %d",
1856
pidfilename, pid)
1857
except NameError:
1858
# "pidfile" was never created
1859
pass
1860
del pidfilename
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
818
819
def cleanup():
820
"Cleanup function; run on exit"
821
global group
822
# From the Avahi example code
823
if not group is None:
824
group.Free()
825
group = None
826
# End of Avahi example code
827
828
while clients:
829
client = clients.pop()
830
client.stop_hook = None
831
client.stop()
832
833
atexit.register(cleanup)
1861
834
1862
835
if not debug:
1863
836
signal.signal(signal.SIGINT, signal.SIG_IGN)
1864
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1865
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1866
839
1867
if use_dbus:
1868
class MandosDBusService(dbus.service.Object):
1869
"""A D-Bus proxy object"""
1870
def __init__(self):
1871
dbus.service.Object.__init__(self, bus, u"/")
1872
_interface = u"se.bsnet.fukt.Mandos"
1873
1874
@dbus.service.signal(_interface, signature=u"o")
1875
def ClientAdded(self, objpath):
1876
"D-Bus signal"
1877
pass
1878
1879
@dbus.service.signal(_interface, signature=u"ss")
1880
def ClientNotFound(self, fingerprint, address):
1881
"D-Bus signal"
1882
pass
1883
1884
@dbus.service.signal(_interface, signature=u"os")
1885
def ClientRemoved(self, objpath, name):
1886
"D-Bus signal"
1887
pass
1888
1889
@dbus.service.method(_interface, out_signature=u"ao")
1890
def GetAllClients(self):
1891
"D-Bus method"
1892
return dbus.Array(c.dbus_object_path
1893
for c in tcp_server.clients)
1894
1895
@dbus.service.method(_interface,
1896
out_signature=u"a{oa{sv}}")
1897
def GetAllClientsWithProperties(self):
1898
"D-Bus method"
1899
return dbus.Dictionary(
1900
((c.dbus_object_path, c.GetAll(u""))
1901
for c in tcp_server.clients),
1902
signature=u"oa{sv}")
1903
1904
@dbus.service.method(_interface, in_signature=u"o")
1905
def RemoveClient(self, object_path):
1906
"D-Bus method"
1907
for c in tcp_server.clients:
1908
if c.dbus_object_path == object_path:
1909
tcp_server.clients.remove(c)
1910
c.remove_from_connection()
1911
# Don't signal anything except ClientRemoved
1912
c.disable(quiet=True)
1913
# Emit D-Bus signal
1914
self.ClientRemoved(object_path, c.name)
1915
return
1916
raise KeyError(object_path)
1917
1918
del _interface
1919
1920
mandos_dbus_service = MandosDBusService()
1921
1922
def cleanup():
1923
"Cleanup function; run on exit"
1924
service.cleanup()
1925
1926
while tcp_server.clients:
1927
client = tcp_server.clients.pop()
1928
if use_dbus:
1929
client.remove_from_connection()
1930
client.disable_hook = None
1931
# Don't signal anything except ClientRemoved
1932
client.disable(quiet=True)
1933
if use_dbus:
1934
# Emit D-Bus signal
1935
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1936
client.name)
1937
1938
atexit.register(cleanup)
1939
1940
for client in tcp_server.clients:
1941
if use_dbus:
1942
# Emit D-Bus signal
1943
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1944
client.enable()
1945
1946
tcp_server.enable()
1947
tcp_server.server_activate()
1948
840
for client in clients:
841
client.start()
842
843
tcp_server = IPv6_TCPServer((server_settings["address"],
844
server_settings["port"]),
845
tcp_handler,
846
settings=server_settings,
847
clients=clients)
1949
848
# Find out what port we got
1950
849
service.port = tcp_server.socket.getsockname()[1]
1951
if use_ipv6:
1952
logger.info(u"Now listening on address %r, port %d,"
1953
" flowinfo %d, scope_id %d"
1954
% tcp_server.socket.getsockname())
1955
else: # IPv4
1956
logger.info(u"Now listening on address %r, port %d"
1957
% tcp_server.socket.getsockname())
850
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
851
u" scope_id %d" % tcp_server.socket.getsockname())
1958
852
1959
853
#service.interface = tcp_server.socket.getsockname()[3]
1960
854
1961
855
try:
1962
856
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
1963
858
try:
1964
service.activate()
859
server_state_changed(server.GetState())
1965
860
except dbus.exceptions.DBusException, error:
1966
861
logger.critical(u"DBusException: %s", error)
1967
cleanup()
1968
862
sys.exit(1)
1969
863
# End of Avahi example code
1970
864
1971
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1972
866
lambda *args, **kwargs:
1973
(tcp_server.handle_request
1974
(*args[2:], **kwargs) or True))
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
1975
869
1976
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
1977
872
main_loop.run()
1978
873
except AvahiError, error:
1979
logger.critical(u"AvahiError: %s", error)
1980
cleanup()
874
logger.critical(u"AvahiError: %s" + unicode(error))
1981
875
sys.exit(1)
1982
876
except KeyboardInterrupt:
1983
877
if debug:
1984
print >> sys.stderr
1985
logger.debug(u"Server received KeyboardInterrupt")
1986
logger.debug(u"Server exiting")
1987
# Must run before the D-Bus bus name gets deregistered
1988
cleanup()
878
print
1989
879
1990
880
if __name__ == '__main__':
1991
881
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0