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- Committer: Björn Påhlsson
- Date: 2008-11-12 05:46:49 UTC
- mfrom: (237.1.2 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 240.
- Revision ID: belorn@braxen-20081112054649-g3m4i22ncnaf5hbi
merge
- files added:
- debian/mandos-client.config
- files removed:
- DBUS-API
- debian/source
- 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
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# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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12
#
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13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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# Copyright © 2008 Teddy Hogeborn
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# Copyright © 2008 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
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18
# it under the terms of the GNU General Public License as published by
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31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
from __future__ import division, with_statement, absolute_import
36
35
37
import SocketServer as socketserver
36
import SocketServer
38
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import socket
39
import optparse
38
from optparse import OptionParser
40
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import datetime
41
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import errno
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import gnutls.crypto
45
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import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
import ConfigParser as configparser
47
import ConfigParser
49
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import sys
50
49
import re
51
50
import os
52
51
import signal
52
from sets import Set
53
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import subprocess
54
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import atexit
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import stat
56
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import logging
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import logging.handlers
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import pwd
59
import contextlib
60
import struct
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import fcntl
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import functools
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import cPickle as pickle
64
import multiprocessing
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from contextlib import closing
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60
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import dbus
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62
import dbus.service
70
65
from dbus.mainloop.glib import DBusGMainLoop
71
66
import ctypes
72
67
import ctypes.util
73
import xml.dom.minidom
74
import inspect
75
76
try:
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
except AttributeError:
79
try:
80
from IN import SO_BINDTODEVICE
81
except ImportError:
82
SO_BINDTODEVICE = None
83
84
85
version = "1.2.3"
86
87
#logger = logging.getLogger('mandos')
68
69
version = "1.0.2"
70
88
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logger = logging.Logger('mandos')
89
72
syslogger = (logging.handlers.SysLogHandler
90
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
74
address = "/dev/log"))
92
75
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
76
('Mandos: %(levelname)s: %(message)s'))
95
77
logger.addHandler(syslogger)
96
78
97
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console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
100
81
' %(message)s'))
101
82
logger.addHandler(console)
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83
103
84
class AvahiError(Exception):
104
def __init__(self, value, *args, **kwargs):
85
def __init__(self, value):
105
86
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
87
super(AvahiError, self).__init__()
88
def __str__(self):
89
return repr(self.value)
109
90
110
91
class AvahiServiceError(AvahiError):
111
92
pass
116
97
117
98
class AvahiService(object):
118
99
"""An Avahi (Zeroconf) service.
119
120
100
Attributes:
121
101
interface: integer; avahi.IF_UNSPEC or an interface index.
122
102
Used to optionally bind to the specified interface.
130
110
max_renames: integer; maximum number of renames
131
111
rename_count: integer; counter so we only rename after collisions
132
112
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
136
113
"""
137
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
115
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
116
domain = "", host = "", max_renames = 32768):
141
117
self.interface = interface
142
118
self.name = name
143
119
self.type = servicetype
147
123
self.host = host
148
124
self.rename_count = 0
149
125
self.max_renames = max_renames
150
self.protocol = protocol
151
self.group = None # our entry group
152
self.server = None
153
self.bus = bus
154
126
def rename(self):
155
127
"""Derived from the Avahi example code"""
156
128
if self.rename_count >= self.max_renames:
157
logger.critical("No suitable Zeroconf service name found"
158
" after %i retries, exiting.",
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
159
131
self.rename_count)
160
132
raise AvahiServiceError("Too many renames")
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
162
logger.info("Changing Zeroconf service name to %r ...",
163
self.name)
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
164
136
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
168
139
self.remove()
169
try:
170
self.add()
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
173
self.cleanup()
174
os._exit(1)
140
self.add()
175
141
self.rename_count += 1
176
142
def remove(self):
177
143
"""Derived from the Avahi example code"""
178
if self.group is not None:
179
self.group.Reset()
144
if group is not None:
145
group.Reset()
180
146
def add(self):
181
147
"""Derived from the Avahi example code"""
182
if self.group is None:
183
self.group = dbus.Interface(
184
self.bus.get_object(avahi.DBUS_NAME,
185
self.server.EntryGroupNew()),
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
191
self.name, self.type)
192
self.group.AddService(
193
self.interface,
194
self.protocol,
195
dbus.UInt32(0), # flags
196
self.name, self.type,
197
self.domain, self.host,
198
dbus.UInt16(self.port),
199
avahi.string_array_to_txt_array(self.TXT))
200
self.group.Commit()
201
def entry_group_state_changed(self, state, error):
202
"""Derived from the Avahi example code"""
203
logger.debug("Avahi entry group state change: %i", state)
204
205
if state == avahi.ENTRY_GROUP_ESTABLISHED:
206
logger.debug("Zeroconf service established.")
207
elif state == avahi.ENTRY_GROUP_COLLISION:
208
logger.info("Zeroconf service name collision.")
209
self.rename()
210
elif state == avahi.ENTRY_GROUP_FAILURE:
211
logger.critical("Avahi: Error in group state changed %s",
212
unicode(error))
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
215
def cleanup(self):
216
"""Derived from the Avahi example code"""
217
if self.group is not None:
218
self.group.Free()
219
self.group = None
220
def server_state_changed(self, state):
221
"""Derived from the Avahi example code"""
222
logger.debug("Avahi server state change: %i", state)
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
226
elif state == avahi.SERVER_RUNNING:
227
self.add()
228
def activate(self):
229
"""Derived from the Avahi example code"""
230
if self.server is None:
231
self.server = dbus.Interface(
232
self.bus.get_object(avahi.DBUS_NAME,
233
avahi.DBUS_PATH_SERVER),
234
avahi.DBUS_INTERFACE_SERVER)
235
self.server.connect_to_signal("StateChanged",
236
self.server_state_changed)
237
self.server_state_changed(self.server.GetState())
238
239
240
class Client(object):
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
class Client(dbus.service.Object):
241
174
"""A representation of a client host served by this server.
242
243
175
Attributes:
244
_approved: bool(); 'None' if not yet approved/disapproved
245
approval_delay: datetime.timedelta(); Time to wait for approval
246
approval_duration: datetime.timedelta(); Duration of one approval
247
checker: subprocess.Popen(); a running checker process used
248
to see if the client lives.
249
'None' if no process is running.
250
checker_callback_tag: a gobject event source tag, or None
251
checker_command: string; External command which is run to check
252
if client lives. %() expansions are done at
253
runtime with vars(self) as dict, so that for
254
instance %(name)s can be used in the command.
255
checker_initiator_tag: a gobject event source tag, or None
256
created: datetime.datetime(); (UTC) object creation
257
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
259
disable_initiator_tag: a gobject event source tag, or None
260
enabled: bool()
176
name: string; from the config file, used in log messages
261
177
fingerprint: string (40 or 32 hexadecimal digits); used to
262
178
uniquely identify the client
263
host: string; available for use by the checker command
264
interval: datetime.timedelta(); How often to start a new checker
265
last_approval_request: datetime.datetime(); (UTC) or None
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); (UTC) object creation
182
started: datetime.datetime(); (UTC) last started
266
183
last_checked_ok: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
268
name: string; from the config file, used in log messages and
269
D-Bus identifiers
270
secret: bytestring; sent verbatim (over TLS) to client
271
timeout: datetime.timedelta(); How long from last_checked_ok
272
until this client is disabled
273
runtime_expansions: Allowed attributes for runtime expansion.
184
timeout: datetime.timedelta(); How long from last_checked_ok
185
until this client is invalid
186
interval: datetime.timedelta(); How often to start a new checker
187
stop_hook: If set, called by stop() as stop_hook(self)
188
checker: subprocess.Popen(); a running checker process used
189
to see if the client lives.
190
'None' if no process is running.
191
checker_initiator_tag: a gobject event source tag, or None
192
stop_initiator_tag: - '' -
193
checker_callback_tag: - '' -
194
checker_command: string; External command which is run to check if
195
client lives. %() expansions are done at
196
runtime with vars(self) as dict, so that for
197
instance %(name)s can be used in the command.
198
Private attibutes:
199
_timeout: Real variable for 'timeout'
200
_interval: Real variable for 'interval'
201
_timeout_milliseconds: Used when calling gobject.timeout_add()
202
_interval_milliseconds: - '' -
274
203
"""
275
276
runtime_expansions = ("approval_delay", "approval_duration",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
279
"last_enabled", "name", "timeout")
280
281
@staticmethod
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
287
288
def timeout_milliseconds(self):
289
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
291
292
def interval_milliseconds(self):
293
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
296
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
204
def _set_timeout(self, timeout):
205
"Setter function for the 'timeout' attribute"
206
self._timeout = timeout
207
self._timeout_milliseconds = ((self.timeout.days
208
* 24 * 60 * 60 * 1000)
209
+ (self.timeout.seconds * 1000)
210
+ (self.timeout.microseconds
211
// 1000))
212
# Emit D-Bus signal
213
self.TimeoutChanged(self._timeout_milliseconds)
214
timeout = property(lambda self: self._timeout, _set_timeout)
215
del _set_timeout
216
217
def _set_interval(self, interval):
218
"Setter function for the 'interval' attribute"
219
self._interval = interval
220
self._interval_milliseconds = ((self.interval.days
221
* 24 * 60 * 60 * 1000)
222
+ (self.interval.seconds
223
* 1000)
224
+ (self.interval.microseconds
225
// 1000))
226
# Emit D-Bus signal
227
self.IntervalChanged(self._interval_milliseconds)
228
interval = property(lambda self: self._interval, _set_interval)
229
del _set_interval
230
231
def __init__(self, name = None, stop_hook=None, config=None):
300
232
"""Note: the 'checker' key in 'config' sets the
301
233
'checker_command' attribute and *not* the 'checker'
302
234
attribute."""
303
self.name = name
235
dbus.service.Object.__init__(self, bus,
236
"/Mandos/clients/%s"
237
% name.replace(".", "_"))
304
238
if config is None:
305
239
config = {}
306
logger.debug("Creating client %r", self.name)
240
self.name = name
241
logger.debug(u"Creating client %r", self.name)
307
242
# Uppercase and remove spaces from fingerprint for later
308
243
# comparison purposes with return value from the fingerprint()
309
244
# function
310
245
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
312
logger.debug(" Fingerprint: %s", self.fingerprint)
246
.replace(u" ", u""))
247
logger.debug(u" Fingerprint: %s", self.fingerprint)
313
248
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
249
self.secret = config["secret"].decode(u"base64")
315
250
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
251
with closing(open(os.path.expanduser
252
(os.path.expandvars
253
(config["secfile"])))) as secfile:
319
254
self.secret = secfile.read()
320
255
else:
321
raise TypeError("No secret or secfile for client %s"
256
raise TypeError(u"No secret or secfile for client %s"
322
257
% self.name)
323
258
self.host = config.get("host", "")
324
259
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
260
self.started = None
328
261
self.last_checked_ok = None
329
262
self.timeout = string_to_delta(config["timeout"])
330
263
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
264
self.stop_hook = stop_hook
332
265
self.checker = None
333
266
self.checker_initiator_tag = None
334
self.disable_initiator_tag = None
267
self.stop_initiator_tag = None
335
268
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
337
self.current_checker_command = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
342
self.approvals_pending = 0
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
269
self.check_command = config["checker"]
348
270
349
def send_changedstate(self):
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
354
def enable(self):
271
def start(self):
355
272
"""Start this client's checker and timeout hooks"""
356
if getattr(self, "enabled", False):
357
# Already enabled
358
return
359
self.send_changedstate()
360
self.last_enabled = datetime.datetime.utcnow()
273
self.started = datetime.datetime.utcnow()
361
274
# Schedule a new checker to be started an 'interval' from now,
362
275
# and every interval from then on.
363
276
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
277
(self._interval_milliseconds,
365
278
self.start_checker))
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
369
self.disable))
370
self.enabled = True
371
279
# Also start a new checker *right now*.
372
280
self.start_checker()
281
# Schedule a stop() when 'timeout' has passed
282
self.stop_initiator_tag = (gobject.timeout_add
283
(self._timeout_milliseconds,
284
self.stop))
285
# Emit D-Bus signal
286
self.StateChanged(True)
373
287
374
def disable(self, quiet=True):
375
"""Disable this client."""
376
if not getattr(self, "enabled", False):
288
def stop(self):
289
"""Stop this client."""
290
if getattr(self, "started", None) is not None:
291
logger.info(u"Stopping client %s", self.name)
292
else:
377
293
return False
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
381
logger.info("Disabling client %s", self.name)
382
if getattr(self, "disable_initiator_tag", False):
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = None
294
if getattr(self, "stop_initiator_tag", False):
295
gobject.source_remove(self.stop_initiator_tag)
296
self.stop_initiator_tag = None
385
297
if getattr(self, "checker_initiator_tag", False):
386
298
gobject.source_remove(self.checker_initiator_tag)
387
299
self.checker_initiator_tag = None
388
300
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
391
self.enabled = False
301
if self.stop_hook:
302
self.stop_hook(self)
303
self.started = None
304
# Emit D-Bus signal
305
self.StateChanged(False)
392
306
# Do not run this again if called by a gobject.timeout_add
393
307
return False
394
308
395
309
def __del__(self):
396
self.disable_hook = None
397
self.disable()
310
self.stop_hook = None
311
self.stop()
398
312
399
def checker_callback(self, pid, condition, command):
313
def checker_callback(self, pid, condition):
400
314
"""The checker has completed, so take appropriate actions."""
401
315
self.checker_callback_tag = None
402
316
self.checker = None
403
if os.WIFEXITED(condition):
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
406
logger.info("Checker for %(name)s succeeded",
407
vars(self))
408
self.checked_ok()
409
else:
410
logger.info("Checker for %(name)s failed",
411
vars(self))
412
else:
413
logger.warning("Checker for %(name)s crashed?",
317
if (os.WIFEXITED(condition)
318
and (os.WEXITSTATUS(condition) == 0)):
319
logger.info(u"Checker for %(name)s succeeded",
320
vars(self))
321
# Emit D-Bus signal
322
self.CheckerCompleted(True)
323
self.bump_timeout()
324
elif not os.WIFEXITED(condition):
325
logger.warning(u"Checker for %(name)s crashed?",
414
326
vars(self))
327
# Emit D-Bus signal
328
self.CheckerCompleted(False)
329
else:
330
logger.info(u"Checker for %(name)s failed",
331
vars(self))
332
# Emit D-Bus signal
333
self.CheckerCompleted(False)
415
334
416
def checked_ok(self):
335
def bump_timeout(self):
417
336
"""Bump up the timeout for this client.
418
419
337
This should only be called when the client has been seen,
420
338
alive and well.
421
339
"""
422
340
self.last_checked_ok = datetime.datetime.utcnow()
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
427
428
def need_approval(self):
429
self.last_approval_request = datetime.datetime.utcnow()
341
gobject.source_remove(self.stop_initiator_tag)
342
self.stop_initiator_tag = (gobject.timeout_add
343
(self._timeout_milliseconds,
344
self.stop))
430
345
431
346
def start_checker(self):
432
347
"""Start a new checker subprocess if one is not running.
433
434
348
If a checker already exists, leave it running and do
435
349
nothing."""
436
350
# The reason for not killing a running checker is that if we
439
353
# client would inevitably timeout, since no checker would get
440
354
# a chance to run to completion. If we instead leave running
441
355
# checkers alone, the checker would have to take more time
442
# than 'timeout' for the client to be disabled, which is as it
443
# should be.
444
445
# If a checker exists, make sure it is not a zombie
446
try:
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
452
else:
453
if pid:
454
logger.warning("Checker was a zombie")
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback(pid, status,
457
self.current_checker_command)
458
# Start a new checker if needed
356
# than 'timeout' for the client to be declared invalid, which
357
# is as it should be.
459
358
if self.checker is None:
460
359
try:
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
360
# In case check_command has exactly one % operator
361
command = self.check_command % self.host
463
362
except TypeError:
464
363
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
364
escaped_attrs = dict((key, re.escape(str(val)))
365
for key, val in
366
vars(self).iteritems())
473
367
try:
474
command = self.checker_command % escaped_attrs
368
command = self.check_command % escaped_attrs
475
369
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
370
logger.error(u'Could not format string "%s":'
371
u' %s', self.check_command, error)
478
372
return True # Try again later
479
self.current_checker_command = command
480
373
try:
481
logger.info("Starting checker %r for %s",
374
logger.info(u"Starting checker %r for %s",
482
375
command, self.name)
483
376
# We don't need to redirect stdout and stderr, since
484
377
# in normal mode, that is already done by daemon(),
489
382
shell=True, cwd="/")
490
383
self.checker_callback_tag = (gobject.child_watch_add
491
384
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
385
self.checker_callback))
386
# Emit D-Bus signal
387
self.CheckerStarted(command)
500
388
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
389
logger.error(u"Failed to start subprocess: %s",
502
390
error)
503
391
# Re-run this periodically if run by gobject.timeout_add
504
392
return True
510
398
self.checker_callback_tag = None
511
399
if getattr(self, "checker", None) is None:
512
400
return
513
logger.debug("Stopping checker for %(name)s", vars(self))
401
logger.debug(u"Stopping checker for %(name)s", vars(self))
514
402
try:
515
403
os.kill(self.checker.pid, signal.SIGTERM)
516
#time.sleep(0.5)
404
#os.sleep(0.5)
517
405
#if self.checker.poll() is None:
518
406
# os.kill(self.checker.pid, signal.SIGKILL)
519
407
except OSError, error:
520
408
if error.errno != errno.ESRCH: # No such process
521
409
raise
522
410
self.checker = None
523
524
def dbus_service_property(dbus_interface, signature="v",
525
access="readwrite", byte_arrays=False):
526
"""Decorators for marking methods of a DBusObjectWithProperties to
527
become properties on the D-Bus.
528
529
The decorated method will be called with no arguments by "Get"
530
and with one argument by "Set".
531
532
The parameters, where they are supported, are the same as
533
dbus.service.method, except there is only "signature", since the
534
type from Get() and the type sent to Set() is the same.
535
"""
536
# Encoding deeply encoded byte arrays is not supported yet by the
537
# "Set" method, so we fail early here:
538
if byte_arrays and signature != "ay":
539
raise ValueError("Byte arrays not supported for non-'ay'"
540
" signature %r" % signature)
541
def decorator(func):
542
func._dbus_is_property = True
543
func._dbus_interface = dbus_interface
544
func._dbus_signature = signature
545
func._dbus_access = access
546
func._dbus_name = func.__name__
547
if func._dbus_name.endswith("_dbus_property"):
548
func._dbus_name = func._dbus_name[:-14]
549
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
550
return func
551
return decorator
552
553
554
class DBusPropertyException(dbus.exceptions.DBusException):
555
"""A base class for D-Bus property-related exceptions
556
"""
557
def __unicode__(self):
558
return unicode(str(self))
559
560
561
class DBusPropertyAccessException(DBusPropertyException):
562
"""A property's access permissions disallows an operation.
563
"""
564
pass
565
566
567
class DBusPropertyNotFound(DBusPropertyException):
568
"""An attempt was made to access a non-existing property.
569
"""
570
pass
571
572
573
class DBusObjectWithProperties(dbus.service.Object):
574
"""A D-Bus object with properties.
575
576
Classes inheriting from this can use the dbus_service_property
577
decorator to expose methods as D-Bus properties. It exposes the
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
579
"""
580
581
@staticmethod
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
584
585
def _get_all_dbus_properties(self):
586
"""Returns a generator of (name, attribute) pairs
587
"""
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
591
592
def _get_dbus_property(self, interface_name, property_name):
593
"""Returns a bound method if one exists which is a D-Bus
594
property with the specified name and interface.
595
"""
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
606
# No such property
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
+ interface_name + "."
609
+ property_name)
610
611
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
612
out_signature="v")
613
def Get(self, interface_name, property_name):
614
"""Standard D-Bus property Get() method, see D-Bus standard.
615
"""
616
prop = self._get_dbus_property(interface_name, property_name)
617
if prop._dbus_access == "write":
618
raise DBusPropertyAccessException(property_name)
619
value = prop()
620
if not hasattr(value, "variant_level"):
621
return value
622
return type(value)(value, variant_level=value.variant_level+1)
623
624
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
625
def Set(self, interface_name, property_name, value):
626
"""Standard D-Bus property Set() method, see D-Bus standard.
627
"""
628
prop = self._get_dbus_property(interface_name, property_name)
629
if prop._dbus_access == "read":
630
raise DBusPropertyAccessException(property_name)
631
if prop._dbus_get_args_options["byte_arrays"]:
632
# The byte_arrays option is not supported yet on
633
# signatures other than "ay".
634
if prop._dbus_signature != "ay":
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
638
prop(value)
639
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
641
out_signature="a{sv}")
642
def GetAll(self, interface_name):
643
"""Standard D-Bus property GetAll() method, see D-Bus
644
standard.
645
646
Note: Will not include properties with access="write".
647
"""
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
650
if (interface_name
651
and interface_name != prop._dbus_interface):
652
# Interface non-empty but did not match
653
continue
654
# Ignore write-only properties
655
if prop._dbus_access == "write":
656
continue
657
value = prop()
658
if not hasattr(value, "variant_level"):
659
all[name] = value
660
continue
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
664
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
666
out_signature="s",
667
path_keyword='object_path',
668
connection_keyword='connection')
669
def Introspect(self, object_path, connection):
670
"""Standard D-Bus method, overloaded to insert property tags.
671
"""
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
673
connection)
674
try:
675
document = xml.dom.minidom.parseString(xmlstring)
676
def make_tag(document, name, prop):
677
e = document.createElement("property")
678
e.setAttribute("name", name)
679
e.setAttribute("type", prop._dbus_signature)
680
e.setAttribute("access", prop._dbus_access)
681
return e
682
for if_tag in document.getElementsByTagName("interface"):
683
for tag in (make_tag(document, name, prop)
684
for name, prop
685
in self._get_all_dbus_properties()
686
if prop._dbus_interface
687
== if_tag.getAttribute("name")):
688
if_tag.appendChild(tag)
689
# Add the names to the return values for the
690
# "org.freedesktop.DBus.Properties" methods
691
if (if_tag.getAttribute("name")
692
== "org.freedesktop.DBus.Properties"):
693
for cn in if_tag.getElementsByTagName("method"):
694
if cn.getAttribute("name") == "Get":
695
for arg in cn.getElementsByTagName("arg"):
696
if (arg.getAttribute("direction")
697
== "out"):
698
arg.setAttribute("name", "value")
699
elif cn.getAttribute("name") == "GetAll":
700
for arg in cn.getElementsByTagName("arg"):
701
if (arg.getAttribute("direction")
702
== "out"):
703
arg.setAttribute("name", "props")
704
xmlstring = document.toxml("utf-8")
705
document.unlink()
706
except (AttributeError, xml.dom.DOMException,
707
xml.parsers.expat.ExpatError), error:
708
logger.error("Failed to override Introspection method",
709
error)
710
return xmlstring
711
712
713
class ClientDBus(Client, DBusObjectWithProperties):
714
"""A Client class using D-Bus
715
716
Attributes:
717
dbus_object_path: dbus.ObjectPath
718
bus: dbus.SystemBus()
719
"""
720
721
runtime_expansions = (Client.runtime_expansions
722
+ ("dbus_object_path",))
723
724
# dbus.service.Object doesn't use super(), so we can't either.
725
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
728
self.bus = bus
729
Client.__init__(self, *args, **kwargs)
730
# Only now, when this client is initialized, can it show up on
731
# the D-Bus
732
client_object_name = unicode(self.name).translate(
733
{ord("."): ord("_"),
734
ord("-"): ord("_")})
735
self.dbus_object_path = (dbus.ObjectPath
736
("/clients/" + client_object_name))
737
DBusObjectWithProperties.__init__(self, self.bus,
738
self.dbus_object_path)
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
783
784
def __del__(self, *args, **kwargs):
785
try:
786
self.remove_from_connection()
787
except LookupError:
788
pass
789
if hasattr(DBusObjectWithProperties, "__del__"):
790
DBusObjectWithProperties.__del__(self, *args, **kwargs)
791
Client.__del__(self, *args, **kwargs)
792
793
def checker_callback(self, pid, condition, command,
794
*args, **kwargs):
795
self.checker_callback_tag = None
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
800
if os.WIFEXITED(condition):
801
exitstatus = os.WEXITSTATUS(condition)
802
# Emit D-Bus signal
803
self.CheckerCompleted(dbus.Int16(exitstatus),
804
dbus.Int64(condition),
805
dbus.String(command))
806
else:
807
# Emit D-Bus signal
808
self.CheckerCompleted(dbus.Int16(-1),
809
dbus.Int64(condition),
810
dbus.String(command))
811
812
return Client.checker_callback(self, pid, condition, command,
813
*args, **kwargs)
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
833
def start_checker(self, *args, **kwargs):
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
837
else:
838
old_checker_pid = None
839
r = Client.start_checker(self, *args, **kwargs)
840
# Only if new checker process was started
841
if (self.checker is not None
842
and old_checker_pid != self.checker.pid):
843
# Emit D-Bus signal
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
848
return r
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
return r
858
859
def _reset_approved(self):
860
self._approved = None
861
return False
862
863
def approve(self, value=True):
864
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
869
870
871
## D-Bus methods, signals & properties
872
_interface = "se.bsnet.fukt.Mandos.Client"
873
874
## Signals
411
412
def still_valid(self):
413
"""Has the timeout not yet passed for this client?"""
414
if not self.started:
415
return False
416
now = datetime.datetime.utcnow()
417
if self.last_checked_ok is None:
418
return now < (self.created + self.timeout)
419
else:
420
return now < (self.last_checked_ok + self.timeout)
421
422
## D-Bus methods & signals
423
_interface = u"org.mandos_system.Mandos.Client"
424
425
def _datetime_to_dbus_struct(dt):
426
return dbus.Struct(dt.year, dt.month, dt.day, dt.hour,
427
dt.minute, dt.second, dt.microsecond,
428
signature="nyyyyyu")
429
430
# BumpTimeout - method
431
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
432
BumpTimeout.__name__ = "BumpTimeout"
433
434
# IntervalChanged - signal
435
@dbus.service.signal(_interface, signature="t")
436
def IntervalChanged(self, t):
437
"D-Bus signal"
438
pass
875
439
876
440
# CheckerCompleted - signal
877
@dbus.service.signal(_interface, signature="nxs")
878
def CheckerCompleted(self, exitcode, waitstatus, command):
441
@dbus.service.signal(_interface, signature="b")
442
def CheckerCompleted(self, success):
879
443
"D-Bus signal"
880
444
pass
881
445
446
# CheckerIsRunning - method
447
@dbus.service.method(_interface, out_signature="b")
448
def CheckerIsRunning(self):
449
"D-Bus getter method"
450
return self.checker is not None
451
882
452
# CheckerStarted - signal
883
453
@dbus.service.signal(_interface, signature="s")
884
454
def CheckerStarted(self, command):
885
455
"D-Bus signal"
886
456
pass
887
457
888
# PropertyChanged - signal
889
@dbus.service.signal(_interface, signature="sv")
890
def PropertyChanged(self, property, value):
891
"D-Bus signal"
892
pass
893
894
# GotSecret - signal
895
@dbus.service.signal(_interface)
896
def GotSecret(self):
897
"""D-Bus signal
898
Is sent after a successful transfer of secret from the Mandos
899
server to mandos-client
900
"""
901
pass
902
903
# Rejected - signal
904
@dbus.service.signal(_interface, signature="s")
905
def Rejected(self, reason):
906
"D-Bus signal"
907
pass
908
909
# NeedApproval - signal
910
@dbus.service.signal(_interface, signature="tb")
911
def NeedApproval(self, timeout, default):
912
"D-Bus signal"
913
return self.need_approval()
914
915
## Methods
916
917
# Approve - method
918
@dbus.service.method(_interface, in_signature="b")
919
def Approve(self, value):
920
self.approve(value)
921
922
# CheckedOK - method
923
@dbus.service.method(_interface)
924
def CheckedOK(self):
925
return self.checked_ok()
926
927
# Enable - method
928
@dbus.service.method(_interface)
929
def Enable(self):
930
"D-Bus method"
931
self.enable()
458
# GetChecker - method
459
@dbus.service.method(_interface, out_signature="s")
460
def GetChecker(self):
461
"D-Bus getter method"
462
return self.checker_command
463
464
# GetCreated - method
465
@dbus.service.method(_interface, out_signature="(nyyyyyu)")
466
def GetCreated(self):
467
"D-Bus getter method"
468
return datetime_to_dbus_struct(self.created)
469
470
# GetFingerprint - method
471
@dbus.service.method(_interface, out_signature="s")
472
def GetFingerprint(self):
473
"D-Bus getter method"
474
return self.fingerprint
475
476
# GetHost - method
477
@dbus.service.method(_interface, out_signature="s")
478
def GetHost(self):
479
"D-Bus getter method"
480
return self.host
481
482
# GetInterval - method
483
@dbus.service.method(_interface, out_signature="t")
484
def GetInterval(self):
485
"D-Bus getter method"
486
return self._interval_milliseconds
487
488
# GetName - method
489
@dbus.service.method(_interface, out_signature="s")
490
def GetName(self):
491
"D-Bus getter method"
492
return self.name
493
494
# GetStarted - method
495
@dbus.service.method(_interface, out_signature="(nyyyyyu)")
496
def GetStarted(self):
497
"D-Bus getter method"
498
if self.started is not None:
499
return datetime_to_dbus_struct(self.started)
500
else:
501
return dbus.Struct(0, 0, 0, 0, 0, 0, 0,
502
signature="nyyyyyu")
503
504
# GetTimeout - method
505
@dbus.service.method(_interface, out_signature="t")
506
def GetTimeout(self):
507
"D-Bus getter method"
508
return self._timeout_milliseconds
509
510
# SetChecker - method
511
@dbus.service.method(_interface, in_signature="s")
512
def SetChecker(self, checker):
513
"D-Bus setter method"
514
self.checker_command = checker
515
516
# SetHost - method
517
@dbus.service.method(_interface, in_signature="s")
518
def SetHost(self, host):
519
"D-Bus setter method"
520
self.host = host
521
522
# SetInterval - method
523
@dbus.service.method(_interface, in_signature="t")
524
def SetInterval(self, milliseconds):
525
self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
526
527
# SetTimeout - method
528
@dbus.service.method(_interface, in_signature="t")
529
def SetTimeout(self, milliseconds):
530
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
531
532
# SetSecret - method
533
@dbus.service.method(_interface, in_signature="ay",
534
byte_arrays=True)
535
def SetSecret(self, secret):
536
"D-Bus setter method"
537
self.secret = str(secret)
538
539
# Start - method
540
Start = dbus.service.method(_interface)(start)
541
Start.__name__ = "Start"
932
542
933
543
# StartChecker - method
934
@dbus.service.method(_interface)
935
def StartChecker(self):
936
"D-Bus method"
937
self.start_checker()
938
939
# Disable - method
940
@dbus.service.method(_interface)
941
def Disable(self):
942
"D-Bus method"
943
self.disable()
544
StartChecker = dbus.service.method(_interface)(start_checker)
545
StartChecker.__name__ = "StartChecker"
546
547
# StateChanged - signal
548
@dbus.service.signal(_interface, signature="b")
549
def StateChanged(self, started):
550
"D-Bus signal"
551
pass
552
553
# StillValid - method
554
StillValid = (dbus.service.method(_interface, out_signature="b")
555
(still_valid))
556
StillValid.__name__ = "StillValid"
557
558
# Stop - method
559
Stop = dbus.service.method(_interface)(stop)
560
Stop.__name__ = "Stop"
944
561
945
562
# StopChecker - method
946
@dbus.service.method(_interface)
947
def StopChecker(self):
948
self.stop_checker()
949
950
## Properties
951
952
# ApprovalPending - property
953
@dbus_service_property(_interface, signature="b", access="read")
954
def ApprovalPending_dbus_property(self):
955
return dbus.Boolean(bool(self.approvals_pending))
956
957
# ApprovedByDefault - property
958
@dbus_service_property(_interface, signature="b",
959
access="readwrite")
960
def ApprovedByDefault_dbus_property(self, value=None):
961
if value is None: # get
962
return dbus.Boolean(self.approved_by_default)
963
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
967
968
# ApprovalDelay - property
969
@dbus_service_property(_interface, signature="t",
970
access="readwrite")
971
def ApprovalDelay_dbus_property(self, value=None):
972
if value is None: # get
973
return dbus.UInt64(self.approval_delay_milliseconds())
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
978
979
# ApprovalDuration - property
980
@dbus_service_property(_interface, signature="t",
981
access="readwrite")
982
def ApprovalDuration_dbus_property(self, value=None):
983
if value is None: # get
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
990
991
# Name - property
992
@dbus_service_property(_interface, signature="s", access="read")
993
def Name_dbus_property(self):
994
return dbus.String(self.name)
995
996
# Fingerprint - property
997
@dbus_service_property(_interface, signature="s", access="read")
998
def Fingerprint_dbus_property(self):
999
return dbus.String(self.fingerprint)
1000
1001
# Host - property
1002
@dbus_service_property(_interface, signature="s",
1003
access="readwrite")
1004
def Host_dbus_property(self, value=None):
1005
if value is None: # get
1006
return dbus.String(self.host)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1011
1012
# Created - property
1013
@dbus_service_property(_interface, signature="s", access="read")
1014
def Created_dbus_property(self):
1015
return dbus.String(self._datetime_to_dbus(self.created))
1016
1017
# LastEnabled - property
1018
@dbus_service_property(_interface, signature="s", access="read")
1019
def LastEnabled_dbus_property(self):
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1023
1024
# Enabled - property
1025
@dbus_service_property(_interface, signature="b",
1026
access="readwrite")
1027
def Enabled_dbus_property(self, value=None):
1028
if value is None: # get
1029
return dbus.Boolean(self.enabled)
1030
if value:
1031
self.enable()
1032
else:
1033
self.disable()
1034
1035
# LastCheckedOK - property
1036
@dbus_service_property(_interface, signature="s",
1037
access="readwrite")
1038
def LastCheckedOK_dbus_property(self, value=None):
1039
if value is not None:
1040
self.checked_ok()
1041
return
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1046
1047
# LastApprovalRequest - property
1048
@dbus_service_property(_interface, signature="s", access="read")
1049
def LastApprovalRequest_dbus_property(self):
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1055
1056
# Timeout - property
1057
@dbus_service_property(_interface, signature="t",
1058
access="readwrite")
1059
def Timeout_dbus_property(self, value=None):
1060
if value is None: # get
1061
return dbus.UInt64(self.timeout_milliseconds())
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1083
1084
# Interval - property
1085
@dbus_service_property(_interface, signature="t",
1086
access="readwrite")
1087
def Interval_dbus_property(self, value=None):
1088
if value is None: # get
1089
return dbus.UInt64(self.interval_milliseconds())
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1094
if getattr(self, "checker_initiator_tag", None) is None:
1095
return
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1101
1102
# Checker - property
1103
@dbus_service_property(_interface, signature="s",
1104
access="readwrite")
1105
def Checker_dbus_property(self, value=None):
1106
if value is None: # get
1107
return dbus.String(self.checker_command)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1113
1114
# CheckerRunning - property
1115
@dbus_service_property(_interface, signature="b",
1116
access="readwrite")
1117
def CheckerRunning_dbus_property(self, value=None):
1118
if value is None: # get
1119
return dbus.Boolean(self.checker is not None)
1120
if value:
1121
self.start_checker()
1122
else:
1123
self.stop_checker()
1124
1125
# ObjectPath - property
1126
@dbus_service_property(_interface, signature="o", access="read")
1127
def ObjectPath_dbus_property(self):
1128
return self.dbus_object_path # is already a dbus.ObjectPath
1129
1130
# Secret = property
1131
@dbus_service_property(_interface, signature="ay",
1132
access="write", byte_arrays=True)
1133
def Secret_dbus_property(self, value):
1134
self.secret = str(value)
1135
563
StopChecker = dbus.service.method(_interface)(stop_checker)
564
StopChecker.__name__ = "StopChecker"
565
566
# TimeoutChanged - signal
567
@dbus.service.signal(_interface, signature="t")
568
def TimeoutChanged(self, t):
569
"D-Bus signal"
570
pass
571
572
del _datetime_to_dbus_struct
1136
573
del _interface
1137
574
1138
575
1139
class ProxyClient(object):
1140
def __init__(self, child_pipe, fpr, address):
1141
self._pipe = child_pipe
1142
self._pipe.send(('init', fpr, address))
1143
if not self._pipe.recv():
1144
raise KeyError()
1145
1146
def __getattribute__(self, name):
1147
if(name == '_pipe'):
1148
return super(ProxyClient, self).__getattribute__(name)
1149
self._pipe.send(('getattr', name))
1150
data = self._pipe.recv()
1151
if data[0] == 'data':
1152
return data[1]
1153
if data[0] == 'function':
1154
def func(*args, **kwargs):
1155
self._pipe.send(('funcall', name, args, kwargs))
1156
return self._pipe.recv()[1]
1157
return func
1158
1159
def __setattr__(self, name, value):
1160
if(name == '_pipe'):
1161
return super(ProxyClient, self).__setattr__(name, value)
1162
self._pipe.send(('setattr', name, value))
1163
1164
1165
class ClientHandler(socketserver.BaseRequestHandler, object):
1166
"""A class to handle client connections.
1167
1168
Instantiated once for each connection to handle it.
576
def peer_certificate(session):
577
"Return the peer's OpenPGP certificate as a bytestring"
578
# If not an OpenPGP certificate...
579
if (gnutls.library.functions
580
.gnutls_certificate_type_get(session._c_object)
581
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
582
# ...do the normal thing
583
return session.peer_certificate
584
list_size = ctypes.c_uint()
585
cert_list = (gnutls.library.functions
586
.gnutls_certificate_get_peers
587
(session._c_object, ctypes.byref(list_size)))
588
if list_size.value == 0:
589
return None
590
cert = cert_list[0]
591
return ctypes.string_at(cert.data, cert.size)
592
593
594
def fingerprint(openpgp):
595
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
596
# New GnuTLS "datum" with the OpenPGP public key
597
datum = (gnutls.library.types
598
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
599
ctypes.POINTER
600
(ctypes.c_ubyte)),
601
ctypes.c_uint(len(openpgp))))
602
# New empty GnuTLS certificate
603
crt = gnutls.library.types.gnutls_openpgp_crt_t()
604
(gnutls.library.functions
605
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
606
# Import the OpenPGP public key into the certificate
607
(gnutls.library.functions
608
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
609
gnutls.library.constants
610
.GNUTLS_OPENPGP_FMT_RAW))
611
# Verify the self signature in the key
612
crtverify = ctypes.c_uint()
613
(gnutls.library.functions
614
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
615
if crtverify.value != 0:
616
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
617
raise gnutls.errors.CertificateSecurityError("Verify failed")
618
# New buffer for the fingerprint
619
buf = ctypes.create_string_buffer(20)
620
buf_len = ctypes.c_size_t()
621
# Get the fingerprint from the certificate into the buffer
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
624
ctypes.byref(buf_len)))
625
# Deinit the certificate
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
# Convert the buffer to a Python bytestring
628
fpr = ctypes.string_at(buf, buf_len.value)
629
# Convert the bytestring to hexadecimal notation
630
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
631
return hex_fpr
632
633
634
class TCP_handler(SocketServer.BaseRequestHandler, object):
635
"""A TCP request handler class.
636
Instantiated by IPv6_TCPServer for each request to handle it.
1169
637
Note: This will run in its own forked process."""
1170
638
1171
639
def handle(self):
1172
with contextlib.closing(self.server.child_pipe) as child_pipe:
1173
logger.info("TCP connection from: %s",
1174
unicode(self.client_address))
1175
logger.debug("Pipe FD: %d",
1176
self.server.child_pipe.fileno())
1177
1178
session = (gnutls.connection
1179
.ClientSession(self.request,
1180
gnutls.connection
1181
.X509Credentials()))
1182
1183
# Note: gnutls.connection.X509Credentials is really a
1184
# generic GnuTLS certificate credentials object so long as
1185
# no X.509 keys are added to it. Therefore, we can use it
1186
# here despite using OpenPGP certificates.
1187
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
# "+AES-256-CBC", "+SHA1",
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1191
# "+DHE-DSS"))
1192
# Use a fallback default, since this MUST be set.
1193
priority = self.server.gnutls_priority
1194
if priority is None:
1195
priority = "NORMAL"
1196
(gnutls.library.functions
1197
.gnutls_priority_set_direct(session._c_object,
1198
priority, None))
1199
1200
# Start communication using the Mandos protocol
1201
# Get protocol number
1202
line = self.request.makefile().readline()
1203
logger.debug("Protocol version: %r", line)
1204
try:
1205
if int(line.strip().split()[0]) > 1:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
1208
logger.error("Unknown protocol version: %s", error)
1209
return
1210
1211
# Start GnuTLS connection
1212
try:
1213
session.handshake()
1214
except gnutls.errors.GNUTLSError, error:
1215
logger.warning("Handshake failed: %s", error)
1216
# Do not run session.bye() here: the session is not
1217
# established. Just abandon the request.
1218
return
1219
logger.debug("Handshake succeeded")
1220
1221
approval_required = False
1222
try:
1223
try:
1224
fpr = self.fingerprint(self.peer_certificate
1225
(session))
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1227
logger.warning("Bad certificate: %s", error)
1228
return
1229
logger.debug("Fingerprint: %s", fpr)
1230
1231
try:
1232
client = ProxyClient(child_pipe, fpr,
1233
self.client_address)
1234
except KeyError:
1235
return
1236
1237
if client.approval_delay:
1238
delay = client.approval_delay
1239
client.approvals_pending += 1
1240
approval_required = True
1241
1242
while True:
1243
if not client.enabled:
1244
logger.warning("Client %s is disabled",
1245
client.name)
1246
if self.server.use_dbus:
1247
# Emit D-Bus signal
1248
client.Rejected("Disabled")
1249
return
1250
1251
if client._approved or not client.approval_delay:
1252
#We are approved or approval is disabled
1253
break
1254
elif client._approved is None:
1255
logger.info("Client %s needs approval",
1256
client.name)
1257
if self.server.use_dbus:
1258
# Emit D-Bus signal
1259
client.NeedApproval(
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
1262
else:
1263
logger.warning("Client %s was not approved",
1264
client.name)
1265
if self.server.use_dbus:
1266
# Emit D-Bus signal
1267
client.Rejected("Denied")
1268
return
1269
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1272
time = datetime.datetime.now()
1273
client.changedstate.acquire()
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1275
client.changedstate.release()
1276
time2 = datetime.datetime.now()
1277
if (time2 - time) >= delay:
1278
if not client.approved_by_default:
1279
logger.warning("Client %s timed out while"
1280
" waiting for approval",
1281
client.name)
1282
if self.server.use_dbus:
1283
# Emit D-Bus signal
1284
client.Rejected("Approval timed out")
1285
return
1286
else:
1287
break
1288
else:
1289
delay -= time2 - time
1290
1291
sent_size = 0
1292
while sent_size < len(client.secret):
1293
try:
1294
sent = session.send(client.secret[sent_size:])
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1297
return
1298
logger.debug("Sent: %d, remaining: %d",
1299
sent, len(client.secret)
1300
- (sent_size + sent))
1301
sent_size += sent
1302
1303
logger.info("Sending secret to %s", client.name)
1304
# bump the timeout as if seen
1305
client.checked_ok()
1306
if self.server.use_dbus:
1307
# Emit D-Bus signal
1308
client.GotSecret()
1309
1310
finally:
1311
if approval_required:
1312
client.approvals_pending -= 1
1313
try:
1314
session.bye()
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1317
1318
@staticmethod
1319
def peer_certificate(session):
1320
"Return the peer's OpenPGP certificate as a bytestring"
1321
# If not an OpenPGP certificate...
1322
if (gnutls.library.functions
1323
.gnutls_certificate_type_get(session._c_object)
1324
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1325
# ...do the normal thing
1326
return session.peer_certificate
1327
list_size = ctypes.c_uint(1)
1328
cert_list = (gnutls.library.functions
1329
.gnutls_certificate_get_peers
1330
(session._c_object, ctypes.byref(list_size)))
1331
if not bool(cert_list) and list_size.value != 0:
1332
raise gnutls.errors.GNUTLSError("error getting peer"
1333
" certificate")
1334
if list_size.value == 0:
1335
return None
1336
cert = cert_list[0]
1337
return ctypes.string_at(cert.data, cert.size)
1338
1339
@staticmethod
1340
def fingerprint(openpgp):
1341
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1342
# New GnuTLS "datum" with the OpenPGP public key
1343
datum = (gnutls.library.types
1344
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1345
ctypes.POINTER
1346
(ctypes.c_ubyte)),
1347
ctypes.c_uint(len(openpgp))))
1348
# New empty GnuTLS certificate
1349
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1350
(gnutls.library.functions
1351
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1352
# Import the OpenPGP public key into the certificate
1353
(gnutls.library.functions
1354
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1355
gnutls.library.constants
1356
.GNUTLS_OPENPGP_FMT_RAW))
1357
# Verify the self signature in the key
1358
crtverify = ctypes.c_uint()
1359
(gnutls.library.functions
1360
.gnutls_openpgp_crt_verify_self(crt, 0,
1361
ctypes.byref(crtverify)))
1362
if crtverify.value != 0:
1363
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
raise (gnutls.errors.CertificateSecurityError
1365
("Verify failed"))
1366
# New buffer for the fingerprint
1367
buf = ctypes.create_string_buffer(20)
1368
buf_len = ctypes.c_size_t()
1369
# Get the fingerprint from the certificate into the buffer
1370
(gnutls.library.functions
1371
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
ctypes.byref(buf_len)))
1373
# Deinit the certificate
1374
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1375
# Convert the buffer to a Python bytestring
1376
fpr = ctypes.string_at(buf, buf_len.value)
1377
# Convert the bytestring to hexadecimal notation
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1379
return hex_fpr
1380
1381
1382
class MultiprocessingMixIn(object):
1383
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1384
def sub_process_main(self, request, address):
1385
try:
1386
self.finish_request(request, address)
1387
except:
1388
self.handle_error(request, address)
1389
self.close_request(request)
1390
1391
def process_request(self, request, address):
1392
"""Start a new process to process the request."""
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1395
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1397
""" adds a pipe to the MixIn """
1398
def process_request(self, request, client_address):
1399
"""Overrides and wraps the original process_request().
1400
1401
This function creates a new pipe in self.pipe
1402
"""
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1404
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1407
self.child_pipe.close()
1408
self.add_pipe(parent_pipe)
1409
1410
def add_pipe(self, parent_pipe):
1411
"""Dummy function; override as necessary"""
1412
raise NotImplementedError
1413
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1415
socketserver.TCPServer, object):
1416
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1417
640
logger.info(u"TCP connection from: %s",
641
unicode(self.client_address))
642
session = (gnutls.connection
643
.ClientSession(self.request,
644
gnutls.connection
645
.X509Credentials()))
646
647
line = self.request.makefile().readline()
648
logger.debug(u"Protocol version: %r", line)
649
try:
650
if int(line.strip().split()[0]) > 1:
651
raise RuntimeError
652
except (ValueError, IndexError, RuntimeError), error:
653
logger.error(u"Unknown protocol version: %s", error)
654
return
655
656
# Note: gnutls.connection.X509Credentials is really a generic
657
# GnuTLS certificate credentials object so long as no X.509
658
# keys are added to it. Therefore, we can use it here despite
659
# using OpenPGP certificates.
660
661
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
662
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
663
# "+DHE-DSS"))
664
# Use a fallback default, since this MUST be set.
665
priority = self.server.settings.get("priority", "NORMAL")
666
(gnutls.library.functions
667
.gnutls_priority_set_direct(session._c_object,
668
priority, None))
669
670
try:
671
session.handshake()
672
except gnutls.errors.GNUTLSError, error:
673
logger.warning(u"Handshake failed: %s", error)
674
# Do not run session.bye() here: the session is not
675
# established. Just abandon the request.
676
return
677
try:
678
fpr = fingerprint(peer_certificate(session))
679
except (TypeError, gnutls.errors.GNUTLSError), error:
680
logger.warning(u"Bad certificate: %s", error)
681
session.bye()
682
return
683
logger.debug(u"Fingerprint: %s", fpr)
684
for c in self.server.clients:
685
if c.fingerprint == fpr:
686
client = c
687
break
688
else:
689
logger.warning(u"Client not found for fingerprint: %s",
690
fpr)
691
session.bye()
692
return
693
# Have to check if client.still_valid(), since it is possible
694
# that the client timed out while establishing the GnuTLS
695
# session.
696
if not client.still_valid():
697
logger.warning(u"Client %(name)s is invalid",
698
vars(client))
699
session.bye()
700
return
701
## This won't work here, since we're in a fork.
702
# client.bump_timeout()
703
sent_size = 0
704
while sent_size < len(client.secret):
705
sent = session.send(client.secret[sent_size:])
706
logger.debug(u"Sent: %d, remaining: %d",
707
sent, len(client.secret)
708
- (sent_size + sent))
709
sent_size += sent
710
session.bye()
711
712
713
class IPv6_TCPServer(SocketServer.ForkingMixIn,
714
SocketServer.TCPServer, object):
715
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1418
716
Attributes:
717
settings: Server settings
718
clients: Set() of Client objects
1419
719
enabled: Boolean; whether this server is activated yet
1420
interface: None or a network interface name (string)
1421
use_ipv6: Boolean; to use IPv6 or not
1422
720
"""
1423
def __init__(self, server_address, RequestHandlerClass,
1424
interface=None, use_ipv6=True):
1425
self.interface = interface
1426
if use_ipv6:
1427
self.address_family = socket.AF_INET6
1428
socketserver.TCPServer.__init__(self, server_address,
1429
RequestHandlerClass)
721
address_family = socket.AF_INET6
722
def __init__(self, *args, **kwargs):
723
if "settings" in kwargs:
724
self.settings = kwargs["settings"]
725
del kwargs["settings"]
726
if "clients" in kwargs:
727
self.clients = kwargs["clients"]
728
del kwargs["clients"]
729
self.enabled = False
730
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1430
731
def server_bind(self):
1431
732
"""This overrides the normal server_bind() function
1432
733
to bind to an interface if one was specified, and also NOT to
1433
734
bind to an address or port if they were not specified."""
1434
if self.interface is not None:
1435
if SO_BINDTODEVICE is None:
1436
logger.error("SO_BINDTODEVICE does not exist;"
1437
" cannot bind to interface %s",
1438
self.interface)
1439
else:
1440
try:
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1442
SO_BINDTODEVICE,
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1451
logger.error("SO_BINDTODEVICE not available;"
1452
" cannot bind to interface %s",
1453
self.interface)
1454
else:
1455
raise
735
if self.settings["interface"]:
736
# 25 is from /usr/include/asm-i486/socket.h
737
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
738
try:
739
self.socket.setsockopt(socket.SOL_SOCKET,
740
SO_BINDTODEVICE,
741
self.settings["interface"])
742
except socket.error, error:
743
if error[0] == errno.EPERM:
744
logger.error(u"No permission to"
745
u" bind to interface %s",
746
self.settings["interface"])
747
else:
748
raise error
1456
749
# Only bind(2) the socket if we really need to.
1457
750
if self.server_address[0] or self.server_address[1]:
1458
751
if not self.server_address[0]:
1459
if self.address_family == socket.AF_INET6:
1460
any_address = "::" # in6addr_any
1461
else:
1462
any_address = socket.INADDR_ANY
1463
self.server_address = (any_address,
752
in6addr_any = "::"
753
self.server_address = (in6addr_any,
1464
754
self.server_address[1])
1465
755
elif not self.server_address[1]:
1466
756
self.server_address = (self.server_address[0],
1467
757
0)
1468
# if self.interface:
758
# if self.settings["interface"]:
1469
759
# self.server_address = (self.server_address[0],
1470
760
# 0, # port
1471
761
# 0, # flowinfo
1472
762
# if_nametoindex
1473
# (self.interface))
1474
return socketserver.TCPServer.server_bind(self)
1475
1476
1477
class MandosServer(IPv6_TCPServer):
1478
"""Mandos server.
1479
1480
Attributes:
1481
clients: set of Client objects
1482
gnutls_priority GnuTLS priority string
1483
use_dbus: Boolean; to emit D-Bus signals or not
1484
1485
Assumes a gobject.MainLoop event loop.
1486
"""
1487
def __init__(self, server_address, RequestHandlerClass,
1488
interface=None, use_ipv6=True, clients=None,
1489
gnutls_priority=None, use_dbus=True):
1490
self.enabled = False
1491
self.clients = clients
1492
if self.clients is None:
1493
self.clients = set()
1494
self.use_dbus = use_dbus
1495
self.gnutls_priority = gnutls_priority
1496
IPv6_TCPServer.__init__(self, server_address,
1497
RequestHandlerClass,
1498
interface = interface,
1499
use_ipv6 = use_ipv6)
763
# (self.settings
764
# ["interface"]))
765
return super(IPv6_TCPServer, self).server_bind()
1500
766
def server_activate(self):
1501
767
if self.enabled:
1502
return socketserver.TCPServer.server_activate(self)
768
return super(IPv6_TCPServer, self).server_activate()
1503
769
def enable(self):
1504
770
self.enabled = True
1505
def add_pipe(self, parent_pipe):
1506
# Call "handle_ipc" for both data and EOF events
1507
gobject.io_add_watch(parent_pipe.fileno(),
1508
gobject.IO_IN | gobject.IO_HUP,
1509
functools.partial(self.handle_ipc,
1510
parent_pipe = parent_pipe))
1511
1512
def handle_ipc(self, source, condition, parent_pipe=None,
1513
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1530
return False
1531
1532
# Read a request from the child
1533
request = parent_pipe.recv()
1534
command = request[0]
1535
1536
if command == 'init':
1537
fpr = request[1]
1538
address = request[2]
1539
1540
for c in self.clients:
1541
if c.fingerprint == fpr:
1542
client = c
1543
break
1544
else:
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
1547
if self.use_dbus:
1548
# Emit D-Bus signal
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
1550
parent_pipe.send(False)
1551
return False
1552
1553
gobject.io_add_watch(parent_pipe.fileno(),
1554
gobject.IO_IN | gobject.IO_HUP,
1555
functools.partial(self.handle_ipc,
1556
parent_pipe = parent_pipe,
1557
client_object = client))
1558
parent_pipe.send(True)
1559
# remove the old hook in favor of the new above hook on same fileno
1560
return False
1561
if command == 'funcall':
1562
funcname = request[1]
1563
args = request[2]
1564
kwargs = request[3]
1565
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
1568
if command == 'getattr':
1569
attrname = request[1]
1570
if callable(client_object.__getattribute__(attrname)):
1571
parent_pipe.send(('function',))
1572
else:
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1574
1575
if command == 'setattr':
1576
attrname = request[1]
1577
value = request[2]
1578
setattr(client_object, attrname, value)
1579
1580
return True
1581
771
1582
772
1583
773
def string_to_delta(interval):
1584
774
"""Parse a string and return a datetime.timedelta
1585
775
1586
776
>>> string_to_delta('7d')
1587
777
datetime.timedelta(7)
1588
778
>>> string_to_delta('60s')
1591
781
datetime.timedelta(0, 3600)
1592
782
>>> string_to_delta('24h')
1593
783
datetime.timedelta(1)
1594
>>> string_to_delta('1w')
784
>>> string_to_delta(u'1w')
1595
785
datetime.timedelta(7)
1596
786
>>> string_to_delta('5m 30s')
1597
787
datetime.timedelta(0, 330)
1601
791
try:
1602
792
suffix = unicode(s[-1])
1603
793
value = int(s[:-1])
1604
if suffix == "d":
794
if suffix == u"d":
1605
795
delta = datetime.timedelta(value)
1606
elif suffix == "s":
796
elif suffix == u"s":
1607
797
delta = datetime.timedelta(0, value)
1608
elif suffix == "m":
798
elif suffix == u"m":
1609
799
delta = datetime.timedelta(0, 0, 0, 0, value)
1610
elif suffix == "h":
800
elif suffix == u"h":
1611
801
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1612
elif suffix == "w":
802
elif suffix == u"w":
1613
803
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1614
804
else:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
1617
raise ValueError(*(e.args))
805
raise ValueError
806
except (ValueError, IndexError):
807
raise ValueError
1618
808
timevalue += delta
1619
809
return timevalue
1620
810
1621
811
812
def server_state_changed(state):
813
"""Derived from the Avahi example code"""
814
if state == avahi.SERVER_COLLISION:
815
logger.error(u"Zeroconf server name collision")
816
service.remove()
817
elif state == avahi.SERVER_RUNNING:
818
service.add()
819
820
821
def entry_group_state_changed(state, error):
822
"""Derived from the Avahi example code"""
823
logger.debug(u"Avahi state change: %i", state)
824
825
if state == avahi.ENTRY_GROUP_ESTABLISHED:
826
logger.debug(u"Zeroconf service established.")
827
elif state == avahi.ENTRY_GROUP_COLLISION:
828
logger.warning(u"Zeroconf service name collision.")
829
service.rename()
830
elif state == avahi.ENTRY_GROUP_FAILURE:
831
logger.critical(u"Avahi: Error in group state changed %s",
832
unicode(error))
833
raise AvahiGroupError("State changed: %s", str(error))
834
1622
835
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
836
"""Call the C function if_nametoindex(), or equivalent"""
1626
837
global if_nametoindex
1627
838
try:
1628
839
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
840
(ctypes.util.find_library("c"))
1630
841
.if_nametoindex)
1631
842
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
843
if "struct" not in sys.modules:
844
import struct
845
if "fcntl" not in sys.modules:
846
import fcntl
1633
847
def if_nametoindex(interface):
1634
848
"Get an interface index the hard way, i.e. using fcntl()"
1635
849
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
850
with closing(socket.socket()) as s:
1637
851
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
852
struct.pack("16s16x", interface))
853
interface_index = struct.unpack("I", ifreq[16:20])[0]
1642
854
return interface_index
1643
855
return if_nametoindex(interface)
1644
856
1645
857
1646
858
def daemon(nochdir = False, noclose = False):
1647
859
"""See daemon(3). Standard BSD Unix function.
1648
1649
860
This should really exist as os.daemon, but it doesn't (yet)."""
1650
861
if os.fork():
1651
862
sys.exit()
1659
870
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1660
871
if not stat.S_ISCHR(os.fstat(null).st_mode):
1661
872
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1663
% os.path.devnull)
873
"/dev/null not a character device")
1664
874
os.dup2(null, sys.stdin.fileno())
1665
875
os.dup2(null, sys.stdout.fileno())
1666
876
os.dup2(null, sys.stderr.fileno())
1669
879
1670
880
1671
881
def main():
1672
1673
##################################################################
1674
# Parsing of options, both command line and config file
1675
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
882
parser = OptionParser(version = "%%prog %s" % version)
1677
883
parser.add_option("-i", "--interface", type="string",
1678
884
metavar="IF", help="Bind to interface IF")
1679
885
parser.add_option("-a", "--address", type="string",
1680
886
help="Address to listen for requests on")
1681
887
parser.add_option("-p", "--port", type="int",
1682
888
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
889
parser.add_option("--check", action="store_true", default=False,
1684
890
help="Run self-test")
1685
891
parser.add_option("--debug", action="store_true",
1686
892
help="Debug mode; run in foreground and log to"
1687
893
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
894
parser.add_option("--priority", type="string", help="GnuTLS"
1691
895
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
896
parser.add_option("--servicename", type="string", metavar="NAME",
897
help="Zeroconf service name")
1694
898
parser.add_option("--configdir", type="string",
1695
899
default="/etc/mandos", metavar="DIR",
1696
900
help="Directory to search for configuration"
1697
901
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
902
options = parser.parse_args()[0]
1704
903
1705
904
if options.check:
1715
914
"priority":
1716
915
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1717
916
"servicename": "Mandos",
1718
"use_dbus": "True",
1719
"use_ipv6": "True",
1720
"debuglevel": "",
1721
917
}
1722
918
1723
919
# Parse config file for server-global settings
1724
server_config = configparser.SafeConfigParser(server_defaults)
920
server_config = ConfigParser.SafeConfigParser(server_defaults)
1725
921
del server_defaults
1726
server_config.read(os.path.join(options.configdir,
1727
"mandos.conf"))
922
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1728
923
# Convert the SafeConfigParser object to a dict
1729
924
server_settings = server_config.defaults()
1730
# Use the appropriate methods on the non-string config options
1731
for option in ("debug", "use_dbus", "use_ipv6"):
1732
server_settings[option] = server_config.getboolean("DEFAULT",
1733
option)
1734
if server_settings["port"]:
1735
server_settings["port"] = server_config.getint("DEFAULT",
1736
"port")
925
# Use getboolean on the boolean config option
926
server_settings["debug"] = (server_config.getboolean
927
("DEFAULT", "debug"))
1737
928
del server_config
1738
929
1739
930
# Override the settings from the config file with command line
1740
931
# options, if set.
1741
932
for option in ("interface", "address", "port", "debug",
1742
"priority", "servicename", "configdir",
1743
"use_dbus", "use_ipv6", "debuglevel"):
933
"priority", "servicename", "configdir"):
1744
934
value = getattr(options, option)
1745
935
if value is not None:
1746
936
server_settings[option] = value
1747
937
del options
1748
# Force all strings to be unicode
1749
for option in server_settings.keys():
1750
if type(server_settings[option]) is str:
1751
server_settings[option] = unicode(server_settings[option])
1752
938
# Now we have our good server settings in "server_settings"
1753
939
1754
##################################################################
1755
1756
# For convenience
1757
940
debug = server_settings["debug"]
1758
debuglevel = server_settings["debuglevel"]
1759
use_dbus = server_settings["use_dbus"]
1760
use_ipv6 = server_settings["use_ipv6"]
1761
941
942
if not debug:
943
syslogger.setLevel(logging.WARNING)
944
console.setLevel(logging.WARNING)
945
1762
946
if server_settings["servicename"] != "Mandos":
1763
947
syslogger.setFormatter(logging.Formatter
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
948
('Mandos (%s): %%(levelname)s:'
949
' %%(message)s'
1766
950
% server_settings["servicename"]))
1767
951
1768
952
# Parse config file with clients
1769
953
client_defaults = { "timeout": "1h",
1770
954
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
955
"checker": "fping -q -- %(host)s",
1772
956
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
957
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
958
client_config = ConfigParser.SafeConfigParser(client_defaults)
1777
959
client_config.read(os.path.join(server_settings["configdir"],
1778
960
"clients.conf"))
1779
961
1780
global mandos_dbus_service
1781
mandos_dbus_service = None
1782
1783
tcp_server = MandosServer((server_settings["address"],
1784
server_settings["port"]),
1785
ClientHandler,
1786
interface=(server_settings["interface"]
1787
or None),
1788
use_ipv6=use_ipv6,
1789
gnutls_priority=
1790
server_settings["priority"],
1791
use_dbus=use_dbus)
1792
if not debug:
1793
pidfilename = "/var/run/mandos.pid"
1794
try:
1795
pidfile = open(pidfilename, "w")
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
1798
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
1803
try:
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
1806
except KeyError:
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
1813
try:
962
clients = Set()
963
tcp_server = IPv6_TCPServer((server_settings["address"],
964
server_settings["port"]),
965
TCP_handler,
966
settings=server_settings,
967
clients=clients)
968
pidfilename = "/var/run/mandos.pid"
969
try:
970
pidfile = open(pidfilename, "w")
971
except IOError, error:
972
logger.error("Could not open file %r", pidfilename)
973
974
uid = 65534
975
gid = 65534
976
try:
977
uid = pwd.getpwnam("mandos").pw_uid
978
except KeyError:
979
try:
980
uid = pwd.getpwnam("nobody").pw_uid
981
except KeyError:
982
pass
983
try:
984
gid = pwd.getpwnam("mandos").pw_gid
985
except KeyError:
986
try:
987
gid = pwd.getpwnam("nogroup").pw_gid
988
except KeyError:
989
pass
990
try:
991
os.setuid(uid)
1814
992
os.setgid(gid)
1815
os.setuid(uid)
1816
993
except OSError, error:
1817
994
if error[0] != errno.EPERM:
1818
995
raise error
1819
996
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
1827
997
global service
998
service = AvahiService(name = server_settings["servicename"],
999
servicetype = "_mandos._tcp", )
1000
if server_settings["interface"]:
1001
service.interface = (if_nametoindex
1002
(server_settings["interface"]))
1003
1004
global main_loop
1005
global bus
1006
global server
1007
# From the Avahi example code
1008
DBusGMainLoop(set_as_default=True )
1009
main_loop = gobject.MainLoop()
1010
bus = dbus.SystemBus()
1011
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1012
avahi.DBUS_PATH_SERVER),
1013
avahi.DBUS_INTERFACE_SERVER)
1014
# End of Avahi example code
1015
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos", bus)
1016
1017
def remove_from_clients(client):
1018
clients.remove(client)
1019
if not clients:
1020
logger.critical(u"No clients left, exiting")
1021
sys.exit()
1022
1023
clients.update(Set(Client(name = section,
1024
stop_hook = remove_from_clients,
1025
config
1026
= dict(client_config.items(section)))
1027
for section in client_config.sections()))
1028
if not clients:
1029
logger.critical(u"No clients defined")
1030
sys.exit(1)
1031
1828
1032
if debug:
1829
# Enable all possible GnuTLS debugging
1830
1831
# "Use a log level over 10 to enable all debugging options."
1832
# - GnuTLS manual
1833
gnutls.library.functions.gnutls_global_set_log_level(11)
1834
1835
@gnutls.library.types.gnutls_log_func
1836
def debug_gnutls(level, string):
1837
logger.debug("GnuTLS: %s", string[:-1])
1838
1839
(gnutls.library.functions
1840
.gnutls_global_set_log_function(debug_gnutls))
1841
1842
1033
# Redirect stdin so all checkers get /dev/null
1843
1034
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1844
1035
os.dup2(null, sys.stdin.fileno())
1847
1038
else:
1848
1039
# No console logging
1849
1040
logger.removeHandler(console)
1850
1851
# Need to fork before connecting to D-Bus
1852
if not debug:
1853
1041
# Close all input and output, do double fork, etc.
1854
1042
daemon()
1855
1043
1856
global main_loop
1857
# From the Avahi example code
1858
DBusGMainLoop(set_as_default=True )
1859
main_loop = gobject.MainLoop()
1860
bus = dbus.SystemBus()
1861
# End of Avahi example code
1862
if use_dbus:
1863
try:
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1865
bus, do_not_queue=True)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
1868
use_dbus = False
1869
server_settings["use_dbus"] = False
1870
tcp_server.use_dbus = False
1871
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
1875
if server_settings["interface"]:
1876
service.interface = (if_nametoindex
1877
(str(server_settings["interface"])))
1878
1879
global multiprocessing_manager
1880
multiprocessing_manager = multiprocessing.Manager()
1881
1882
client_class = Client
1883
if use_dbus:
1884
client_class = functools.partial(ClientDBus, bus = bus)
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
1892
try:
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
1902
if not tcp_server.clients:
1903
logger.warning("No clients defined")
1044
try:
1045
pid = os.getpid()
1046
pidfile.write(str(pid) + "\n")
1047
pidfile.close()
1048
del pidfile
1049
except IOError:
1050
logger.error(u"Could not write to file %r with PID %d",
1051
pidfilename, pid)
1052
except NameError:
1053
# "pidfile" was never created
1054
pass
1055
del pidfilename
1056
1057
def cleanup():
1058
"Cleanup function; run on exit"
1059
global group
1060
# From the Avahi example code
1061
if not group is None:
1062
group.Free()
1063
group = None
1064
# End of Avahi example code
1904
1065
1066
while clients:
1067
client = clients.pop()
1068
client.stop_hook = None
1069
client.stop()
1070
1071
atexit.register(cleanup)
1072
1905
1073
if not debug:
1906
try:
1907
with pidfile:
1908
pid = os.getpid()
1909
pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
del pidfile
1911
except IOError:
1912
logger.error("Could not write to file %r with PID %d",
1913
pidfilename, pid)
1914
except NameError:
1915
# "pidfile" was never created
1916
pass
1917
del pidfilename
1918
1919
1074
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
1921
1075
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1922
1076
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1923
1077
1924
if use_dbus:
1925
class MandosDBusService(dbus.service.Object):
1926
"""A D-Bus proxy object"""
1927
def __init__(self):
1928
dbus.service.Object.__init__(self, bus, "/")
1929
_interface = "se.bsnet.fukt.Mandos"
1930
1931
@dbus.service.signal(_interface, signature="o")
1932
def ClientAdded(self, objpath):
1933
"D-Bus signal"
1934
pass
1935
1936
@dbus.service.signal(_interface, signature="ss")
1937
def ClientNotFound(self, fingerprint, address):
1938
"D-Bus signal"
1939
pass
1940
1941
@dbus.service.signal(_interface, signature="os")
1942
def ClientRemoved(self, objpath, name):
1943
"D-Bus signal"
1944
pass
1945
1946
@dbus.service.method(_interface, out_signature="ao")
1947
def GetAllClients(self):
1948
"D-Bus method"
1949
return dbus.Array(c.dbus_object_path
1950
for c in tcp_server.clients)
1951
1952
@dbus.service.method(_interface,
1953
out_signature="a{oa{sv}}")
1954
def GetAllClientsWithProperties(self):
1955
"D-Bus method"
1956
return dbus.Dictionary(
1957
((c.dbus_object_path, c.GetAll(""))
1958
for c in tcp_server.clients),
1959
signature="oa{sv}")
1960
1961
@dbus.service.method(_interface, in_signature="o")
1962
def RemoveClient(self, object_path):
1963
"D-Bus method"
1964
for c in tcp_server.clients:
1965
if c.dbus_object_path == object_path:
1966
tcp_server.clients.remove(c)
1967
c.remove_from_connection()
1968
# Don't signal anything except ClientRemoved
1969
c.disable(quiet=True)
1970
# Emit D-Bus signal
1971
self.ClientRemoved(object_path, c.name)
1972
return
1973
raise KeyError(object_path)
1974
1975
del _interface
1976
1977
mandos_dbus_service = MandosDBusService()
1978
1979
def cleanup():
1980
"Cleanup function; run on exit"
1981
service.cleanup()
1982
1983
while tcp_server.clients:
1984
client = tcp_server.clients.pop()
1985
if use_dbus:
1986
client.remove_from_connection()
1987
client.disable_hook = None
1988
# Don't signal anything except ClientRemoved
1989
client.disable(quiet=True)
1990
if use_dbus:
1991
# Emit D-Bus signal
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1993
client.name)
1994
1995
atexit.register(cleanup)
1996
1997
for client in tcp_server.clients:
1998
if use_dbus:
1999
# Emit D-Bus signal
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2001
client.enable()
1078
for client in clients:
1079
client.start()
2002
1080
2003
1081
tcp_server.enable()
2004
1082
tcp_server.server_activate()
2005
1083
2006
1084
# Find out what port we got
2007
1085
service.port = tcp_server.socket.getsockname()[1]
2008
if use_ipv6:
2009
logger.info("Now listening on address %r, port %d,"
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
2012
else: # IPv4
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
1086
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1087
u" scope_id %d" % tcp_server.socket.getsockname())
2015
1088
2016
1089
#service.interface = tcp_server.socket.getsockname()[3]
2017
1090
2018
1091
try:
2019
1092
# From the Avahi example code
1093
server.connect_to_signal("StateChanged", server_state_changed)
2020
1094
try:
2021
service.activate()
1095
server_state_changed(server.GetState())
2022
1096
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2024
cleanup()
1097
logger.critical(u"DBusException: %s", error)
2025
1098
sys.exit(1)
2026
1099
# End of Avahi example code
2027
1100
2030
1103
(tcp_server.handle_request
2031
1104
(*args[2:], **kwargs) or True))
2032
1105
2033
logger.debug("Starting main loop")
1106
logger.debug(u"Starting main loop")
2034
1107
main_loop.run()
2035
1108
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
2037
cleanup()
1109
logger.critical(u"AvahiError: %s" + unicode(error))
2038
1110
sys.exit(1)
2039
1111
except KeyboardInterrupt:
2040
1112
if debug:
2041
print("", file=sys.stderr)
2042
logger.debug("Server received KeyboardInterrupt")
2043
logger.debug("Server exiting")
2044
# Must run before the D-Bus bus name gets deregistered
2045
cleanup()
1113
print
2046
1114
2047
1115
if __name__ == '__main__':
2048
1116
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0