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- Committer: Teddy Hogeborn
- Date: 2011-11-26 23:08:17 UTC
- mto: (518.1.8 mandos-persistent)
- mto: This revision was merged to the branch mainline in revision 524.
- Revision ID: teddy@recompile.se-20111126230817-tv08v831s2yltbkd
Make "enabled" a client config option.
* DBUS-API: Fix wording on "Expires" option.
* clients.conf (enabled): New.
* mandos (Client): "last_enabled" can now be None.
(Client.__init__): Get "enabled" from config. Only set
"last_enabled" and "expires" if enabled.
(ClientDBus.Created_dbus_property): Removed redundant dbus.String().
(ClientDBus.Interval_dbus_property): If changed, only reschedule
checker if enabled.
(main/special_settings): Added "enabled".
* mandos-clients.conf (OPTIONS): Added "enabled".
* DBUS-API: Fix wording on "Expires" option.
* clients.conf (enabled): New.
* mandos (Client): "last_enabled" can now be None.
(Client.__init__): Get "enabled" from config. Only set
"last_enabled" and "expires" if enabled.
(ClientDBus.Created_dbus_property): Removed redundant dbus.String().
(ClientDBus.Interval_dbus_property): If changed, only reschedule
checker if enabled.
(main/special_settings): Added "enabled".
* mandos-clients.conf (OPTIONS): Added "enabled".
- files added:
- DBUS-API
- debian/source
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
15
16
#
16
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# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
27
28
# along with this program. If not, see
28
29
# <http://www.gnu.org/licenses/>.
29
30
#
30
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
31
32
#
32
33
33
from __future__ import division
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
36
35
import SocketServer
37
import SocketServer as socketserver
36
38
import socket
37
import select
38
from optparse import OptionParser
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
44
45
import gnutls.library.functions
45
46
import gnutls.library.constants
46
47
import gnutls.library.types
47
import ConfigParser
48
import ConfigParser as configparser
48
49
import sys
49
50
import re
50
51
import os
51
52
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
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55
import stat
56
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import logging
57
57
import logging.handlers
58
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import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
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import tempfile
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68
60
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import dbus
70
import dbus.service
61
71
import gobject
62
72
import avahi
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from dbus.mainloop.glib import DBusGMainLoop
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74
import ctypes
65
66
version = "1.0"
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68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
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syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
74
logger.addHandler(syslogger)
75
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
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logger.addHandler(console)
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import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
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80
try:
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
except AttributeError:
83
try:
84
from IN import SO_BINDTODEVICE
85
except ImportError:
86
SO_BINDTODEVICE = None
87
88
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version = "1.4.1"
90
stored_state_file = "clients.pickle"
91
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logger = logging.getLogger()
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syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
119
' %(message)s'))
120
logger.addHandler(syslogger)
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console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
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logger.setLevel(level)
129
130
131
class CryptoError(Exception):
132
pass
133
134
135
class Crypto(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise CryptoError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise CryptoError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
80
209
81
210
class AvahiError(Exception):
82
def __init__(self, value):
211
def __init__(self, value, *args, **kwargs):
83
212
self.value = value
84
def __str__(self):
85
return repr(self.value)
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
86
216
87
217
class AvahiServiceError(AvahiError):
88
218
pass
93
223
94
224
class AvahiService(object):
95
225
"""An Avahi (Zeroconf) service.
226
96
227
Attributes:
97
228
interface: integer; avahi.IF_UNSPEC or an interface index.
98
229
Used to optionally bind to the specified interface.
106
237
max_renames: integer; maximum number of renames
107
238
rename_count: integer; counter so we only rename after collisions
108
239
a sensible number of times
240
group: D-Bus Entry Group
241
server: D-Bus Server
242
bus: dbus.SystemBus()
109
243
"""
110
244
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
245
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
247
protocol = avahi.PROTO_UNSPEC, bus = None):
113
248
self.interface = interface
114
249
self.name = name
115
self.type = type
250
self.type = servicetype
116
251
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
252
self.TXT = TXT if TXT is not None else []
121
253
self.domain = domain
122
254
self.host = host
123
255
self.rename_count = 0
124
256
self.max_renames = max_renames
257
self.protocol = protocol
258
self.group = None # our entry group
259
self.server = None
260
self.bus = bus
261
self.entry_group_state_changed_match = None
125
262
def rename(self):
126
263
"""Derived from the Avahi example code"""
127
264
if self.rename_count >= self.max_renames:
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
130
rename_count)
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
267
self.rename_count)
131
268
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
133
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
138
273
self.remove()
139
self.add()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
140
280
self.rename_count += 1
141
281
def remove(self):
142
282
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
286
if self.group is not None:
287
self.group.Reset()
145
288
def add(self):
146
289
"""Derived from the Avahi example code"""
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
170
171
290
self.remove()
291
if self.group is None:
292
self.group = dbus.Interface(
293
self.bus.get_object(avahi.DBUS_NAME,
294
self.server.EntryGroupNew()),
295
avahi.DBUS_INTERFACE_ENTRY_GROUP)
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
300
self.name, self.type)
301
self.group.AddService(
302
self.interface,
303
self.protocol,
304
dbus.UInt32(0), # flags
305
self.name, self.type,
306
self.domain, self.host,
307
dbus.UInt16(self.port),
308
avahi.string_array_to_txt_array(self.TXT))
309
self.group.Commit()
310
def entry_group_state_changed(self, state, error):
311
"""Derived from the Avahi example code"""
312
logger.debug("Avahi entry group state change: %i", state)
313
314
if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
logger.debug("Zeroconf service established.")
316
elif state == avahi.ENTRY_GROUP_COLLISION:
317
logger.info("Zeroconf service name collision.")
318
self.rename()
319
elif state == avahi.ENTRY_GROUP_FAILURE:
320
logger.critical("Avahi: Error in group state changed %s",
321
unicode(error))
322
raise AvahiGroupError("State changed: %s"
323
% unicode(error))
324
def cleanup(self):
325
"""Derived from the Avahi example code"""
326
if self.group is not None:
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
332
self.group = None
333
self.remove()
334
def server_state_changed(self, state, error=None):
335
"""Derived from the Avahi example code"""
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
351
elif state == avahi.SERVER_RUNNING:
352
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
358
def activate(self):
359
"""Derived from the Avahi example code"""
360
if self.server is None:
361
self.server = dbus.Interface(
362
self.bus.get_object(avahi.DBUS_NAME,
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
365
avahi.DBUS_INTERFACE_SERVER)
366
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
368
self.server_state_changed(self.server.GetState())
369
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
379
380
def _timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
172
386
class Client(object):
173
387
"""A representation of a client host served by this server.
388
174
389
Attributes:
175
name: string; from the config file, used in log messages
390
_approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
393
checker: subprocess.Popen(); a running checker process used
394
to see if the client lives.
395
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
399
runtime with vars(self) as dict, so that for
400
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
405
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
176
408
fingerprint: string (40 or 32 hexadecimal digits); used to
177
409
uniquely identify the client
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
189
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
191
checker_callback_tag: - '' -
192
checker_command: string; External command which is run to check if
193
client lives. %() expansions are done at
194
runtime with vars(self) as dict, so that for
195
instance %(name)s can be used in the command.
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
417
checker, or None.
418
last_enabled: datetime.datetime(); (UTC) or None
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
201
428
"""
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
429
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
434
435
def timeout_milliseconds(self):
436
"Return the 'timeout' attribute in milliseconds"
437
return _timedelta_to_milliseconds(self.timeout)
438
439
def extended_timeout_milliseconds(self):
440
"Return the 'extended_timeout' attribute in milliseconds"
441
return _timedelta_to_milliseconds(self.extended_timeout)
442
443
def interval_milliseconds(self):
444
"Return the 'interval' attribute in milliseconds"
445
return _timedelta_to_milliseconds(self.interval)
446
447
def approval_delay_milliseconds(self):
448
return _timedelta_to_milliseconds(self.approval_delay)
449
450
def __init__(self, name = None, config=None):
226
451
"""Note: the 'checker' key in 'config' sets the
227
452
'checker_command' attribute and *not* the 'checker'
228
453
attribute."""
229
454
self.name = name
230
logger.debug(u"Creating client %r", self.name)
455
if config is None:
456
config = {}
457
logger.debug("Creating client %r", self.name)
231
458
# Uppercase and remove spaces from fingerprint for later
232
459
# comparison purposes with return value from the fingerprint()
233
460
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
461
self.fingerprint = (config["fingerprint"].upper()
462
.replace(" ", ""))
463
logger.debug(" Fingerprint: %s", self.fingerprint)
237
464
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
465
self.secret = config["secret"].decode("base64")
239
466
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
467
with open(os.path.expanduser(os.path.expandvars
468
(config["secfile"])),
469
"rb") as secfile:
470
self.secret = secfile.read()
243
471
else:
244
raise TypeError(u"No secret or secfile for client %s"
472
raise TypeError("No secret or secfile for client %s"
245
473
% self.name)
246
474
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
475
self.created = datetime.datetime.utcnow()
476
self.enabled = config.get("enabled", True)
477
self.last_approval_request = None
478
if self.enabled:
479
self.last_enabled = datetime.datetime.utcnow()
480
else:
481
self.last_enabled = None
248
482
self.last_checked_ok = None
483
self.last_checker_status = None
249
484
self.timeout = string_to_delta(config["timeout"])
485
self.extended_timeout = string_to_delta(config
486
["extended_timeout"])
250
487
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
252
488
self.checker = None
253
489
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
490
self.disable_initiator_tag = None
491
if self.enabled:
492
self.expires = datetime.datetime.utcnow() + self.timeout
493
else:
494
self.expires = None
255
495
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
496
self.checker_command = config["checker"]
497
self.current_checker_command = None
498
self._approved = None
499
self.approved_by_default = config.get("approved_by_default",
500
True)
501
self.approvals_pending = 0
502
self.approval_delay = string_to_delta(
503
config["approval_delay"])
504
self.approval_duration = string_to_delta(
505
config["approval_duration"])
506
self.changedstate = (multiprocessing_manager
507
.Condition(multiprocessing_manager
508
.Lock()))
509
self.client_structure = [attr for attr in
510
self.__dict__.iterkeys()
511
if not attr.startswith("_")]
512
self.client_structure.append("client_structure")
513
514
for name, t in inspect.getmembers(type(self),
515
lambda obj:
516
isinstance(obj,
517
property)):
518
if not name.startswith("_"):
519
self.client_structure.append(name)
520
521
# Send notice to process children that client state has changed
522
def send_changedstate(self):
523
with self.changedstate:
524
self.changedstate.notify_all()
525
526
def enable(self):
258
527
"""Start this client's checker and timeout hooks"""
528
if getattr(self, "enabled", False):
529
# Already enabled
530
return
531
self.send_changedstate()
532
self.expires = datetime.datetime.utcnow() + self.timeout
533
self.enabled = True
534
self.last_enabled = datetime.datetime.utcnow()
535
self.init_checker()
536
537
def disable(self, quiet=True):
538
"""Disable this client."""
539
if not getattr(self, "enabled", False):
540
return False
541
if not quiet:
542
self.send_changedstate()
543
if not quiet:
544
logger.info("Disabling client %s", self.name)
545
if getattr(self, "disable_initiator_tag", False):
546
gobject.source_remove(self.disable_initiator_tag)
547
self.disable_initiator_tag = None
548
self.expires = None
549
if getattr(self, "checker_initiator_tag", False):
550
gobject.source_remove(self.checker_initiator_tag)
551
self.checker_initiator_tag = None
552
self.stop_checker()
553
self.enabled = False
554
# Do not run this again if called by a gobject.timeout_add
555
return False
556
557
def __del__(self):
558
self.disable()
559
560
def init_checker(self):
259
561
# Schedule a new checker to be started an 'interval' from now,
260
562
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
563
self.checker_initiator_tag = (gobject.timeout_add
564
(self.interval_milliseconds(),
565
self.start_checker))
566
# Schedule a disable() when 'timeout' has passed
567
self.disable_initiator_tag = (gobject.timeout_add
568
(self.timeout_milliseconds(),
569
self.disable))
264
570
# Also start a new checker *right now*.
265
571
self.start_checker()
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
279
return False
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
284
gobject.source_remove(self.checker_initiator_tag)
285
self.checker_initiator_tag = None
286
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
289
# Do not run this again if called by a gobject.timeout_add
290
return False
291
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
572
573
def checker_callback(self, pid, condition, command):
295
574
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
575
self.checker_callback_tag = None
298
576
self.checker = None
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
309
logger.warning(u"Checker for %(name)s crashed?",
577
if os.WIFEXITED(condition):
578
self.last_checker_status = os.WEXITSTATUS(condition)
579
if self.last_checker_status == 0:
580
logger.info("Checker for %(name)s succeeded",
581
vars(self))
582
self.checked_ok()
583
else:
584
logger.info("Checker for %(name)s failed",
585
vars(self))
586
else:
587
self.last_checker_status = -1
588
logger.warning("Checker for %(name)s crashed?",
310
589
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
590
591
def checked_ok(self, timeout=None):
592
"""Bump up the timeout for this client.
593
594
This should only be called when the client has been seen,
595
alive and well.
596
"""
597
if timeout is None:
598
timeout = self.timeout
599
self.last_checked_ok = datetime.datetime.utcnow()
600
if self.disable_initiator_tag is not None:
601
gobject.source_remove(self.disable_initiator_tag)
602
if getattr(self, "enabled", False):
603
self.disable_initiator_tag = (gobject.timeout_add
604
(_timedelta_to_milliseconds
605
(timeout), self.disable))
606
self.expires = datetime.datetime.utcnow() + timeout
607
608
def need_approval(self):
609
self.last_approval_request = datetime.datetime.utcnow()
610
314
611
def start_checker(self):
315
612
"""Start a new checker subprocess if one is not running.
613
316
614
If a checker already exists, leave it running and do
317
615
nothing."""
318
616
# The reason for not killing a running checker is that if we
321
619
# client would inevitably timeout, since no checker would get
322
620
# a chance to run to completion. If we instead leave running
323
621
# checkers alone, the checker would have to take more time
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
622
# than 'timeout' for the client to be disabled, which is as it
623
# should be.
624
625
# If a checker exists, make sure it is not a zombie
626
try:
627
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
628
except (AttributeError, OSError) as error:
629
if (isinstance(error, OSError)
630
and error.errno != errno.ECHILD):
631
raise error
632
else:
633
if pid:
634
logger.warning("Checker was a zombie")
635
gobject.source_remove(self.checker_callback_tag)
636
self.checker_callback(pid, status,
637
self.current_checker_command)
638
# Start a new checker if needed
326
639
if self.checker is None:
327
640
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
641
# In case checker_command has exactly one % operator
642
command = self.checker_command % self.host
330
643
except TypeError:
331
644
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
333
for key, val in
334
vars(self).iteritems())
645
escaped_attrs = dict(
646
(attr,
647
re.escape(unicode(str(getattr(self, attr, "")),
648
errors=
649
'replace')))
650
for attr in
651
self.runtime_expansions)
652
335
653
try:
336
command = self.check_command % escaped_attrs
337
except TypeError, error:
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
654
command = self.checker_command % escaped_attrs
655
except TypeError as error:
656
logger.error('Could not format string "%s":'
657
' %s', self.checker_command, error)
340
658
return True # Try again later
659
self.current_checker_command = command
341
660
try:
342
logger.info(u"Starting checker %r for %s",
661
logger.info("Starting checker %r for %s",
343
662
command, self.name)
344
663
# We don't need to redirect stdout and stderr, since
345
664
# in normal mode, that is already done by daemon(),
348
667
self.checker = subprocess.Popen(command,
349
668
close_fds=True,
350
669
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
354
except OSError, error:
355
logger.error(u"Failed to start subprocess: %s",
670
self.checker_callback_tag = (gobject.child_watch_add
671
(self.checker.pid,
672
self.checker_callback,
673
data=command))
674
# The checker may have completed before the gobject
675
# watch was added. Check for this.
676
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
677
if pid:
678
gobject.source_remove(self.checker_callback_tag)
679
self.checker_callback(pid, status, command)
680
except OSError as error:
681
logger.error("Failed to start subprocess: %s",
356
682
error)
357
683
# Re-run this periodically if run by gobject.timeout_add
358
684
return True
685
359
686
def stop_checker(self):
360
687
"""Force the checker process, if any, to stop."""
361
688
if self.checker_callback_tag:
363
690
self.checker_callback_tag = None
364
691
if getattr(self, "checker", None) is None:
365
692
return
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
693
logger.debug("Stopping checker for %(name)s", vars(self))
367
694
try:
368
695
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
696
#time.sleep(0.5)
370
697
#if self.checker.poll() is None:
371
698
# os.kill(self.checker.pid, signal.SIGKILL)
372
except OSError, error:
699
except OSError as error:
373
700
if error.errno != errno.ESRCH: # No such process
374
701
raise
375
702
self.checker = None
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
380
return now < (self.created + self.timeout)
381
else:
382
return now < (self.last_checked_ok + self.timeout)
383
384
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
703
704
705
def dbus_service_property(dbus_interface, signature="v",
706
access="readwrite", byte_arrays=False):
707
"""Decorators for marking methods of a DBusObjectWithProperties to
708
become properties on the D-Bus.
709
710
The decorated method will be called with no arguments by "Get"
711
and with one argument by "Set".
712
713
The parameters, where they are supported, are the same as
714
dbus.service.method, except there is only "signature", since the
715
type from Get() and the type sent to Set() is the same.
716
"""
717
# Encoding deeply encoded byte arrays is not supported yet by the
718
# "Set" method, so we fail early here:
719
if byte_arrays and signature != "ay":
720
raise ValueError("Byte arrays not supported for non-'ay'"
721
" signature %r" % signature)
722
def decorator(func):
723
func._dbus_is_property = True
724
func._dbus_interface = dbus_interface
725
func._dbus_signature = signature
726
func._dbus_access = access
727
func._dbus_name = func.__name__
728
if func._dbus_name.endswith("_dbus_property"):
729
func._dbus_name = func._dbus_name[:-14]
730
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
731
return func
732
return decorator
733
734
735
class DBusPropertyException(dbus.exceptions.DBusException):
736
"""A base class for D-Bus property-related exceptions
737
"""
738
def __unicode__(self):
739
return unicode(str(self))
740
741
742
class DBusPropertyAccessException(DBusPropertyException):
743
"""A property's access permissions disallows an operation.
744
"""
745
pass
746
747
748
class DBusPropertyNotFound(DBusPropertyException):
749
"""An attempt was made to access a non-existing property.
750
"""
751
pass
752
753
754
class DBusObjectWithProperties(dbus.service.Object):
755
"""A D-Bus object with properties.
756
757
Classes inheriting from this can use the dbus_service_property
758
decorator to expose methods as D-Bus properties. It exposes the
759
standard Get(), Set(), and GetAll() methods on the D-Bus.
760
"""
761
762
@staticmethod
763
def _is_dbus_property(obj):
764
return getattr(obj, "_dbus_is_property", False)
765
766
def _get_all_dbus_properties(self):
767
"""Returns a generator of (name, attribute) pairs
768
"""
769
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
770
for cls in self.__class__.__mro__
771
for name, prop in
772
inspect.getmembers(cls, self._is_dbus_property))
773
774
def _get_dbus_property(self, interface_name, property_name):
775
"""Returns a bound method if one exists which is a D-Bus
776
property with the specified name and interface.
777
"""
778
for cls in self.__class__.__mro__:
779
for name, value in (inspect.getmembers
780
(cls, self._is_dbus_property)):
781
if (value._dbus_name == property_name
782
and value._dbus_interface == interface_name):
783
return value.__get__(self)
784
785
# No such property
786
raise DBusPropertyNotFound(self.dbus_object_path + ":"
787
+ interface_name + "."
788
+ property_name)
789
790
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
791
out_signature="v")
792
def Get(self, interface_name, property_name):
793
"""Standard D-Bus property Get() method, see D-Bus standard.
794
"""
795
prop = self._get_dbus_property(interface_name, property_name)
796
if prop._dbus_access == "write":
797
raise DBusPropertyAccessException(property_name)
798
value = prop()
799
if not hasattr(value, "variant_level"):
800
return value
801
return type(value)(value, variant_level=value.variant_level+1)
802
803
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
804
def Set(self, interface_name, property_name, value):
805
"""Standard D-Bus property Set() method, see D-Bus standard.
806
"""
807
prop = self._get_dbus_property(interface_name, property_name)
808
if prop._dbus_access == "read":
809
raise DBusPropertyAccessException(property_name)
810
if prop._dbus_get_args_options["byte_arrays"]:
811
# The byte_arrays option is not supported yet on
812
# signatures other than "ay".
813
if prop._dbus_signature != "ay":
814
raise ValueError
815
value = dbus.ByteArray(''.join(unichr(byte)
816
for byte in value))
817
prop(value)
818
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
820
out_signature="a{sv}")
821
def GetAll(self, interface_name):
822
"""Standard D-Bus property GetAll() method, see D-Bus
823
standard.
824
825
Note: Will not include properties with access="write".
826
"""
827
properties = {}
828
for name, prop in self._get_all_dbus_properties():
829
if (interface_name
830
and interface_name != prop._dbus_interface):
831
# Interface non-empty but did not match
832
continue
833
# Ignore write-only properties
834
if prop._dbus_access == "write":
835
continue
836
value = prop()
837
if not hasattr(value, "variant_level"):
838
properties[name] = value
839
continue
840
properties[name] = type(value)(value, variant_level=
841
value.variant_level+1)
842
return dbus.Dictionary(properties, signature="sv")
843
844
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
845
out_signature="s",
846
path_keyword='object_path',
847
connection_keyword='connection')
848
def Introspect(self, object_path, connection):
849
"""Standard D-Bus method, overloaded to insert property tags.
850
"""
851
xmlstring = dbus.service.Object.Introspect(self, object_path,
852
connection)
853
try:
854
document = xml.dom.minidom.parseString(xmlstring)
855
def make_tag(document, name, prop):
856
e = document.createElement("property")
857
e.setAttribute("name", name)
858
e.setAttribute("type", prop._dbus_signature)
859
e.setAttribute("access", prop._dbus_access)
860
return e
861
for if_tag in document.getElementsByTagName("interface"):
862
for tag in (make_tag(document, name, prop)
863
for name, prop
864
in self._get_all_dbus_properties()
865
if prop._dbus_interface
866
== if_tag.getAttribute("name")):
867
if_tag.appendChild(tag)
868
# Add the names to the return values for the
869
# "org.freedesktop.DBus.Properties" methods
870
if (if_tag.getAttribute("name")
871
== "org.freedesktop.DBus.Properties"):
872
for cn in if_tag.getElementsByTagName("method"):
873
if cn.getAttribute("name") == "Get":
874
for arg in cn.getElementsByTagName("arg"):
875
if (arg.getAttribute("direction")
876
== "out"):
877
arg.setAttribute("name", "value")
878
elif cn.getAttribute("name") == "GetAll":
879
for arg in cn.getElementsByTagName("arg"):
880
if (arg.getAttribute("direction")
881
== "out"):
882
arg.setAttribute("name", "props")
883
xmlstring = document.toxml("utf-8")
884
document.unlink()
885
except (AttributeError, xml.dom.DOMException,
886
xml.parsers.expat.ExpatError) as error:
887
logger.error("Failed to override Introspection method",
888
error)
889
return xmlstring
890
891
892
def datetime_to_dbus (dt, variant_level=0):
893
"""Convert a UTC datetime.datetime() to a D-Bus type."""
894
if dt is None:
895
return dbus.String("", variant_level = variant_level)
896
return dbus.String(dt.isoformat(),
897
variant_level=variant_level)
898
899
900
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
901
.__metaclass__):
902
"""Applied to an empty subclass of a D-Bus object, this metaclass
903
will add additional D-Bus attributes matching a certain pattern.
904
"""
905
def __new__(mcs, name, bases, attr):
906
# Go through all the base classes which could have D-Bus
907
# methods, signals, or properties in them
908
for base in (b for b in bases
909
if issubclass(b, dbus.service.Object)):
910
# Go though all attributes of the base class
911
for attrname, attribute in inspect.getmembers(base):
912
# Ignore non-D-Bus attributes, and D-Bus attributes
913
# with the wrong interface name
914
if (not hasattr(attribute, "_dbus_interface")
915
or not attribute._dbus_interface
916
.startswith("se.recompile.Mandos")):
917
continue
918
# Create an alternate D-Bus interface name based on
919
# the current name
920
alt_interface = (attribute._dbus_interface
921
.replace("se.recompile.Mandos",
922
"se.bsnet.fukt.Mandos"))
923
# Is this a D-Bus signal?
924
if getattr(attribute, "_dbus_is_signal", False):
925
# Extract the original non-method function by
926
# black magic
927
nonmethod_func = (dict(
928
zip(attribute.func_code.co_freevars,
929
attribute.__closure__))["func"]
930
.cell_contents)
931
# Create a new, but exactly alike, function
932
# object, and decorate it to be a new D-Bus signal
933
# with the alternate D-Bus interface name
934
new_function = (dbus.service.signal
935
(alt_interface,
936
attribute._dbus_signature)
937
(types.FunctionType(
938
nonmethod_func.func_code,
939
nonmethod_func.func_globals,
940
nonmethod_func.func_name,
941
nonmethod_func.func_defaults,
942
nonmethod_func.func_closure)))
943
# Define a creator of a function to call both the
944
# old and new functions, so both the old and new
945
# signals gets sent when the function is called
946
def fixscope(func1, func2):
947
"""This function is a scope container to pass
948
func1 and func2 to the "call_both" function
949
outside of its arguments"""
950
def call_both(*args, **kwargs):
951
"""This function will emit two D-Bus
952
signals by calling func1 and func2"""
953
func1(*args, **kwargs)
954
func2(*args, **kwargs)
955
return call_both
956
# Create the "call_both" function and add it to
957
# the class
958
attr[attrname] = fixscope(attribute,
959
new_function)
960
# Is this a D-Bus method?
961
elif getattr(attribute, "_dbus_is_method", False):
962
# Create a new, but exactly alike, function
963
# object. Decorate it to be a new D-Bus method
964
# with the alternate D-Bus interface name. Add it
965
# to the class.
966
attr[attrname] = (dbus.service.method
967
(alt_interface,
968
attribute._dbus_in_signature,
969
attribute._dbus_out_signature)
970
(types.FunctionType
971
(attribute.func_code,
972
attribute.func_globals,
973
attribute.func_name,
974
attribute.func_defaults,
975
attribute.func_closure)))
976
# Is this a D-Bus property?
977
elif getattr(attribute, "_dbus_is_property", False):
978
# Create a new, but exactly alike, function
979
# object, and decorate it to be a new D-Bus
980
# property with the alternate D-Bus interface
981
# name. Add it to the class.
982
attr[attrname] = (dbus_service_property
983
(alt_interface,
984
attribute._dbus_signature,
985
attribute._dbus_access,
986
attribute
987
._dbus_get_args_options
988
["byte_arrays"])
989
(types.FunctionType
990
(attribute.func_code,
991
attribute.func_globals,
992
attribute.func_name,
993
attribute.func_defaults,
994
attribute.func_closure)))
995
return type.__new__(mcs, name, bases, attr)
996
997
998
class ClientDBus(Client, DBusObjectWithProperties):
999
"""A Client class using D-Bus
1000
1001
Attributes:
1002
dbus_object_path: dbus.ObjectPath
1003
bus: dbus.SystemBus()
1004
"""
1005
1006
runtime_expansions = (Client.runtime_expansions
1007
+ ("dbus_object_path",))
1008
1009
# dbus.service.Object doesn't use super(), so we can't either.
1010
1011
def __init__(self, bus = None, *args, **kwargs):
1012
self.bus = bus
1013
Client.__init__(self, *args, **kwargs)
1014
1015
self._approvals_pending = 0
1016
# Only now, when this client is initialized, can it show up on
1017
# the D-Bus
1018
client_object_name = unicode(self.name).translate(
1019
{ord("."): ord("_"),
1020
ord("-"): ord("_")})
1021
self.dbus_object_path = (dbus.ObjectPath
1022
("/clients/" + client_object_name))
1023
DBusObjectWithProperties.__init__(self, self.bus,
1024
self.dbus_object_path)
1025
1026
def notifychangeproperty(transform_func,
1027
dbus_name, type_func=lambda x: x,
1028
variant_level=1):
1029
""" Modify a variable so that it's a property which announces
1030
its changes to DBus.
1031
1032
transform_fun: Function that takes a value and a variant_level
1033
and transforms it to a D-Bus type.
1034
dbus_name: D-Bus name of the variable
1035
type_func: Function that transform the value before sending it
1036
to the D-Bus. Default: no transform
1037
variant_level: D-Bus variant level. Default: 1
1038
"""
1039
attrname = "_{0}".format(dbus_name)
1040
def setter(self, value):
1041
if hasattr(self, "dbus_object_path"):
1042
if (not hasattr(self, attrname) or
1043
type_func(getattr(self, attrname, None))
1044
!= type_func(value)):
1045
dbus_value = transform_func(type_func(value),
1046
variant_level
1047
=variant_level)
1048
self.PropertyChanged(dbus.String(dbus_name),
1049
dbus_value)
1050
setattr(self, attrname, value)
1051
1052
return property(lambda self: getattr(self, attrname), setter)
1053
1054
1055
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1056
approvals_pending = notifychangeproperty(dbus.Boolean,
1057
"ApprovalPending",
1058
type_func = bool)
1059
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1060
last_enabled = notifychangeproperty(datetime_to_dbus,
1061
"LastEnabled")
1062
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1063
type_func = lambda checker:
1064
checker is not None)
1065
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1066
"LastCheckedOK")
1067
last_approval_request = notifychangeproperty(
1068
datetime_to_dbus, "LastApprovalRequest")
1069
approved_by_default = notifychangeproperty(dbus.Boolean,
1070
"ApprovedByDefault")
1071
approval_delay = notifychangeproperty(dbus.UInt16,
1072
"ApprovalDelay",
1073
type_func =
1074
_timedelta_to_milliseconds)
1075
approval_duration = notifychangeproperty(
1076
dbus.UInt16, "ApprovalDuration",
1077
type_func = _timedelta_to_milliseconds)
1078
host = notifychangeproperty(dbus.String, "Host")
1079
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1080
type_func =
1081
_timedelta_to_milliseconds)
1082
extended_timeout = notifychangeproperty(
1083
dbus.UInt16, "ExtendedTimeout",
1084
type_func = _timedelta_to_milliseconds)
1085
interval = notifychangeproperty(dbus.UInt16,
1086
"Interval",
1087
type_func =
1088
_timedelta_to_milliseconds)
1089
checker_command = notifychangeproperty(dbus.String, "Checker")
1090
1091
del notifychangeproperty
1092
1093
def __del__(self, *args, **kwargs):
1094
try:
1095
self.remove_from_connection()
1096
except LookupError:
1097
pass
1098
if hasattr(DBusObjectWithProperties, "__del__"):
1099
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1100
Client.__del__(self, *args, **kwargs)
1101
1102
def checker_callback(self, pid, condition, command,
1103
*args, **kwargs):
1104
self.checker_callback_tag = None
1105
self.checker = None
1106
if os.WIFEXITED(condition):
1107
exitstatus = os.WEXITSTATUS(condition)
1108
# Emit D-Bus signal
1109
self.CheckerCompleted(dbus.Int16(exitstatus),
1110
dbus.Int64(condition),
1111
dbus.String(command))
1112
else:
1113
# Emit D-Bus signal
1114
self.CheckerCompleted(dbus.Int16(-1),
1115
dbus.Int64(condition),
1116
dbus.String(command))
1117
1118
return Client.checker_callback(self, pid, condition, command,
1119
*args, **kwargs)
1120
1121
def start_checker(self, *args, **kwargs):
1122
old_checker = self.checker
1123
if self.checker is not None:
1124
old_checker_pid = self.checker.pid
1125
else:
1126
old_checker_pid = None
1127
r = Client.start_checker(self, *args, **kwargs)
1128
# Only if new checker process was started
1129
if (self.checker is not None
1130
and old_checker_pid != self.checker.pid):
1131
# Emit D-Bus signal
1132
self.CheckerStarted(self.current_checker_command)
1133
return r
1134
1135
def _reset_approved(self):
1136
self._approved = None
1137
return False
1138
1139
def approve(self, value=True):
1140
self.send_changedstate()
1141
self._approved = value
1142
gobject.timeout_add(_timedelta_to_milliseconds
1143
(self.approval_duration),
1144
self._reset_approved)
1145
1146
1147
## D-Bus methods, signals & properties
1148
_interface = "se.recompile.Mandos.Client"
1149
1150
## Signals
1151
1152
# CheckerCompleted - signal
1153
@dbus.service.signal(_interface, signature="nxs")
1154
def CheckerCompleted(self, exitcode, waitstatus, command):
1155
"D-Bus signal"
1156
pass
1157
1158
# CheckerStarted - signal
1159
@dbus.service.signal(_interface, signature="s")
1160
def CheckerStarted(self, command):
1161
"D-Bus signal"
1162
pass
1163
1164
# PropertyChanged - signal
1165
@dbus.service.signal(_interface, signature="sv")
1166
def PropertyChanged(self, property, value):
1167
"D-Bus signal"
1168
pass
1169
1170
# GotSecret - signal
1171
@dbus.service.signal(_interface)
1172
def GotSecret(self):
1173
"""D-Bus signal
1174
Is sent after a successful transfer of secret from the Mandos
1175
server to mandos-client
1176
"""
1177
pass
1178
1179
# Rejected - signal
1180
@dbus.service.signal(_interface, signature="s")
1181
def Rejected(self, reason):
1182
"D-Bus signal"
1183
pass
1184
1185
# NeedApproval - signal
1186
@dbus.service.signal(_interface, signature="tb")
1187
def NeedApproval(self, timeout, default):
1188
"D-Bus signal"
1189
return self.need_approval()
1190
1191
# NeRwequest - signal
1192
@dbus.service.signal(_interface, signature="s")
1193
def NewRequest(self, ip):
1194
"""D-Bus signal
1195
Is sent after a client request a password.
1196
"""
1197
pass
1198
1199
## Methods
1200
1201
# Approve - method
1202
@dbus.service.method(_interface, in_signature="b")
1203
def Approve(self, value):
1204
self.approve(value)
1205
1206
# CheckedOK - method
1207
@dbus.service.method(_interface)
1208
def CheckedOK(self):
1209
self.checked_ok()
1210
1211
# Enable - method
1212
@dbus.service.method(_interface)
1213
def Enable(self):
1214
"D-Bus method"
1215
self.enable()
1216
1217
# StartChecker - method
1218
@dbus.service.method(_interface)
1219
def StartChecker(self):
1220
"D-Bus method"
1221
self.start_checker()
1222
1223
# Disable - method
1224
@dbus.service.method(_interface)
1225
def Disable(self):
1226
"D-Bus method"
1227
self.disable()
1228
1229
# StopChecker - method
1230
@dbus.service.method(_interface)
1231
def StopChecker(self):
1232
self.stop_checker()
1233
1234
## Properties
1235
1236
# ApprovalPending - property
1237
@dbus_service_property(_interface, signature="b", access="read")
1238
def ApprovalPending_dbus_property(self):
1239
return dbus.Boolean(bool(self.approvals_pending))
1240
1241
# ApprovedByDefault - property
1242
@dbus_service_property(_interface, signature="b",
1243
access="readwrite")
1244
def ApprovedByDefault_dbus_property(self, value=None):
1245
if value is None: # get
1246
return dbus.Boolean(self.approved_by_default)
1247
self.approved_by_default = bool(value)
1248
1249
# ApprovalDelay - property
1250
@dbus_service_property(_interface, signature="t",
1251
access="readwrite")
1252
def ApprovalDelay_dbus_property(self, value=None):
1253
if value is None: # get
1254
return dbus.UInt64(self.approval_delay_milliseconds())
1255
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1256
1257
# ApprovalDuration - property
1258
@dbus_service_property(_interface, signature="t",
1259
access="readwrite")
1260
def ApprovalDuration_dbus_property(self, value=None):
1261
if value is None: # get
1262
return dbus.UInt64(_timedelta_to_milliseconds(
1263
self.approval_duration))
1264
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1265
1266
# Name - property
1267
@dbus_service_property(_interface, signature="s", access="read")
1268
def Name_dbus_property(self):
1269
return dbus.String(self.name)
1270
1271
# Fingerprint - property
1272
@dbus_service_property(_interface, signature="s", access="read")
1273
def Fingerprint_dbus_property(self):
1274
return dbus.String(self.fingerprint)
1275
1276
# Host - property
1277
@dbus_service_property(_interface, signature="s",
1278
access="readwrite")
1279
def Host_dbus_property(self, value=None):
1280
if value is None: # get
1281
return dbus.String(self.host)
1282
self.host = value
1283
1284
# Created - property
1285
@dbus_service_property(_interface, signature="s", access="read")
1286
def Created_dbus_property(self):
1287
return datetime_to_dbus(self.created)
1288
1289
# LastEnabled - property
1290
@dbus_service_property(_interface, signature="s", access="read")
1291
def LastEnabled_dbus_property(self):
1292
return datetime_to_dbus(self.last_enabled)
1293
1294
# Enabled - property
1295
@dbus_service_property(_interface, signature="b",
1296
access="readwrite")
1297
def Enabled_dbus_property(self, value=None):
1298
if value is None: # get
1299
return dbus.Boolean(self.enabled)
1300
if value:
1301
self.enable()
1302
else:
1303
self.disable()
1304
1305
# LastCheckedOK - property
1306
@dbus_service_property(_interface, signature="s",
1307
access="readwrite")
1308
def LastCheckedOK_dbus_property(self, value=None):
1309
if value is not None:
1310
self.checked_ok()
1311
return
1312
return datetime_to_dbus(self.last_checked_ok)
1313
1314
# Expires - property
1315
@dbus_service_property(_interface, signature="s", access="read")
1316
def Expires_dbus_property(self):
1317
return datetime_to_dbus(self.expires)
1318
1319
# LastApprovalRequest - property
1320
@dbus_service_property(_interface, signature="s", access="read")
1321
def LastApprovalRequest_dbus_property(self):
1322
return datetime_to_dbus(self.last_approval_request)
1323
1324
# Timeout - property
1325
@dbus_service_property(_interface, signature="t",
1326
access="readwrite")
1327
def Timeout_dbus_property(self, value=None):
1328
if value is None: # get
1329
return dbus.UInt64(self.timeout_milliseconds())
1330
self.timeout = datetime.timedelta(0, 0, 0, value)
1331
if getattr(self, "disable_initiator_tag", None) is None:
1332
return
1333
# Reschedule timeout
1334
gobject.source_remove(self.disable_initiator_tag)
1335
self.disable_initiator_tag = None
1336
self.expires = None
1337
time_to_die = _timedelta_to_milliseconds((self
1338
.last_checked_ok
1339
+ self.timeout)
1340
- datetime.datetime
1341
.utcnow())
1342
if time_to_die <= 0:
1343
# The timeout has passed
1344
self.disable()
1345
else:
1346
self.expires = (datetime.datetime.utcnow()
1347
+ datetime.timedelta(milliseconds =
1348
time_to_die))
1349
self.disable_initiator_tag = (gobject.timeout_add
1350
(time_to_die, self.disable))
1351
1352
# ExtendedTimeout - property
1353
@dbus_service_property(_interface, signature="t",
1354
access="readwrite")
1355
def ExtendedTimeout_dbus_property(self, value=None):
1356
if value is None: # get
1357
return dbus.UInt64(self.extended_timeout_milliseconds())
1358
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1359
1360
# Interval - property
1361
@dbus_service_property(_interface, signature="t",
1362
access="readwrite")
1363
def Interval_dbus_property(self, value=None):
1364
if value is None: # get
1365
return dbus.UInt64(self.interval_milliseconds())
1366
self.interval = datetime.timedelta(0, 0, 0, value)
1367
if getattr(self, "checker_initiator_tag", None) is None:
1368
return
1369
if self.enabled:
1370
# Reschedule checker run
1371
gobject.source_remove(self.checker_initiator_tag)
1372
self.checker_initiator_tag = (gobject.timeout_add
1373
(value, self.start_checker))
1374
self.start_checker() # Start one now, too
1375
1376
# Checker - property
1377
@dbus_service_property(_interface, signature="s",
1378
access="readwrite")
1379
def Checker_dbus_property(self, value=None):
1380
if value is None: # get
1381
return dbus.String(self.checker_command)
1382
self.checker_command = value
1383
1384
# CheckerRunning - property
1385
@dbus_service_property(_interface, signature="b",
1386
access="readwrite")
1387
def CheckerRunning_dbus_property(self, value=None):
1388
if value is None: # get
1389
return dbus.Boolean(self.checker is not None)
1390
if value:
1391
self.start_checker()
1392
else:
1393
self.stop_checker()
1394
1395
# ObjectPath - property
1396
@dbus_service_property(_interface, signature="o", access="read")
1397
def ObjectPath_dbus_property(self):
1398
return self.dbus_object_path # is already a dbus.ObjectPath
1399
1400
# Secret = property
1401
@dbus_service_property(_interface, signature="ay",
1402
access="write", byte_arrays=True)
1403
def Secret_dbus_property(self, value):
1404
self.secret = str(value)
1405
1406
del _interface
1407
1408
1409
class ProxyClient(object):
1410
def __init__(self, child_pipe, fpr, address):
1411
self._pipe = child_pipe
1412
self._pipe.send(('init', fpr, address))
1413
if not self._pipe.recv():
1414
raise KeyError()
1415
1416
def __getattribute__(self, name):
1417
if(name == '_pipe'):
1418
return super(ProxyClient, self).__getattribute__(name)
1419
self._pipe.send(('getattr', name))
1420
data = self._pipe.recv()
1421
if data[0] == 'data':
1422
return data[1]
1423
if data[0] == 'function':
1424
def func(*args, **kwargs):
1425
self._pipe.send(('funcall', name, args, kwargs))
1426
return self._pipe.recv()[1]
1427
return func
1428
1429
def __setattr__(self, name, value):
1430
if(name == '_pipe'):
1431
return super(ProxyClient, self).__setattr__(name, value)
1432
self._pipe.send(('setattr', name, value))
1433
1434
1435
class ClientDBusTransitional(ClientDBus):
1436
__metaclass__ = AlternateDBusNamesMetaclass
1437
1438
1439
class ClientHandler(socketserver.BaseRequestHandler, object):
1440
"""A class to handle client connections.
1441
1442
Instantiated once for each connection to handle it.
442
1443
Note: This will run in its own forked process."""
443
1444
444
1445
def handle(self):
445
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1446
with contextlib.closing(self.server.child_pipe) as child_pipe:
1447
logger.info("TCP connection from: %s",
1448
unicode(self.client_address))
1449
logger.debug("Pipe FD: %d",
1450
self.server.child_pipe.fileno())
1451
1452
session = (gnutls.connection
1453
.ClientSession(self.request,
1454
gnutls.connection
1455
.X509Credentials()))
1456
1457
# Note: gnutls.connection.X509Credentials is really a
1458
# generic GnuTLS certificate credentials object so long as
1459
# no X.509 keys are added to it. Therefore, we can use it
1460
# here despite using OpenPGP certificates.
1461
1462
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1463
# "+AES-256-CBC", "+SHA1",
1464
# "+COMP-NULL", "+CTYPE-OPENPGP",
1465
# "+DHE-DSS"))
1466
# Use a fallback default, since this MUST be set.
1467
priority = self.server.gnutls_priority
1468
if priority is None:
1469
priority = "NORMAL"
1470
(gnutls.library.functions
1471
.gnutls_priority_set_direct(session._c_object,
1472
priority, None))
1473
1474
# Start communication using the Mandos protocol
1475
# Get protocol number
1476
line = self.request.makefile().readline()
1477
logger.debug("Protocol version: %r", line)
1478
try:
1479
if int(line.strip().split()[0]) > 1:
1480
raise RuntimeError
1481
except (ValueError, IndexError, RuntimeError) as error:
1482
logger.error("Unknown protocol version: %s", error)
1483
return
1484
1485
# Start GnuTLS connection
1486
try:
1487
session.handshake()
1488
except gnutls.errors.GNUTLSError as error:
1489
logger.warning("Handshake failed: %s", error)
1490
# Do not run session.bye() here: the session is not
1491
# established. Just abandon the request.
1492
return
1493
logger.debug("Handshake succeeded")
1494
1495
approval_required = False
1496
try:
1497
try:
1498
fpr = self.fingerprint(self.peer_certificate
1499
(session))
1500
except (TypeError,
1501
gnutls.errors.GNUTLSError) as error:
1502
logger.warning("Bad certificate: %s", error)
1503
return
1504
logger.debug("Fingerprint: %s", fpr)
1505
if self.server.use_dbus:
1506
# Emit D-Bus signal
1507
client.NewRequest(str(self.client_address))
1508
1509
try:
1510
client = ProxyClient(child_pipe, fpr,
1511
self.client_address)
1512
except KeyError:
1513
return
1514
1515
if client.approval_delay:
1516
delay = client.approval_delay
1517
client.approvals_pending += 1
1518
approval_required = True
1519
1520
while True:
1521
if not client.enabled:
1522
logger.info("Client %s is disabled",
1523
client.name)
1524
if self.server.use_dbus:
1525
# Emit D-Bus signal
1526
client.Rejected("Disabled")
1527
return
1528
1529
if client._approved or not client.approval_delay:
1530
#We are approved or approval is disabled
1531
break
1532
elif client._approved is None:
1533
logger.info("Client %s needs approval",
1534
client.name)
1535
if self.server.use_dbus:
1536
# Emit D-Bus signal
1537
client.NeedApproval(
1538
client.approval_delay_milliseconds(),
1539
client.approved_by_default)
1540
else:
1541
logger.warning("Client %s was not approved",
1542
client.name)
1543
if self.server.use_dbus:
1544
# Emit D-Bus signal
1545
client.Rejected("Denied")
1546
return
1547
1548
#wait until timeout or approved
1549
time = datetime.datetime.now()
1550
client.changedstate.acquire()
1551
(client.changedstate.wait
1552
(float(client._timedelta_to_milliseconds(delay)
1553
/ 1000)))
1554
client.changedstate.release()
1555
time2 = datetime.datetime.now()
1556
if (time2 - time) >= delay:
1557
if not client.approved_by_default:
1558
logger.warning("Client %s timed out while"
1559
" waiting for approval",
1560
client.name)
1561
if self.server.use_dbus:
1562
# Emit D-Bus signal
1563
client.Rejected("Approval timed out")
1564
return
1565
else:
1566
break
1567
else:
1568
delay -= time2 - time
1569
1570
sent_size = 0
1571
while sent_size < len(client.secret):
1572
try:
1573
sent = session.send(client.secret[sent_size:])
1574
except gnutls.errors.GNUTLSError as error:
1575
logger.warning("gnutls send failed")
1576
return
1577
logger.debug("Sent: %d, remaining: %d",
1578
sent, len(client.secret)
1579
- (sent_size + sent))
1580
sent_size += sent
1581
1582
logger.info("Sending secret to %s", client.name)
1583
# bump the timeout using extended_timeout
1584
client.checked_ok(client.extended_timeout)
1585
if self.server.use_dbus:
1586
# Emit D-Bus signal
1587
client.GotSecret()
1588
1589
finally:
1590
if approval_required:
1591
client.approvals_pending -= 1
1592
try:
1593
session.bye()
1594
except gnutls.errors.GNUTLSError as error:
1595
logger.warning("GnuTLS bye failed")
1596
1597
@staticmethod
1598
def peer_certificate(session):
1599
"Return the peer's OpenPGP certificate as a bytestring"
1600
# If not an OpenPGP certificate...
1601
if (gnutls.library.functions
1602
.gnutls_certificate_type_get(session._c_object)
1603
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1604
# ...do the normal thing
1605
return session.peer_certificate
1606
list_size = ctypes.c_uint(1)
1607
cert_list = (gnutls.library.functions
1608
.gnutls_certificate_get_peers
1609
(session._c_object, ctypes.byref(list_size)))
1610
if not bool(cert_list) and list_size.value != 0:
1611
raise gnutls.errors.GNUTLSError("error getting peer"
1612
" certificate")
1613
if list_size.value == 0:
1614
return None
1615
cert = cert_list[0]
1616
return ctypes.string_at(cert.data, cert.size)
1617
1618
@staticmethod
1619
def fingerprint(openpgp):
1620
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1621
# New GnuTLS "datum" with the OpenPGP public key
1622
datum = (gnutls.library.types
1623
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1624
ctypes.POINTER
1625
(ctypes.c_ubyte)),
1626
ctypes.c_uint(len(openpgp))))
1627
# New empty GnuTLS certificate
1628
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1629
(gnutls.library.functions
1630
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1631
# Import the OpenPGP public key into the certificate
1632
(gnutls.library.functions
1633
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1634
gnutls.library.constants
1635
.GNUTLS_OPENPGP_FMT_RAW))
1636
# Verify the self signature in the key
1637
crtverify = ctypes.c_uint()
1638
(gnutls.library.functions
1639
.gnutls_openpgp_crt_verify_self(crt, 0,
1640
ctypes.byref(crtverify)))
1641
if crtverify.value != 0:
1642
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1643
raise (gnutls.errors.CertificateSecurityError
1644
("Verify failed"))
1645
# New buffer for the fingerprint
1646
buf = ctypes.create_string_buffer(20)
1647
buf_len = ctypes.c_size_t()
1648
# Get the fingerprint from the certificate into the buffer
1649
(gnutls.library.functions
1650
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1651
ctypes.byref(buf_len)))
1652
# Deinit the certificate
1653
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1654
# Convert the buffer to a Python bytestring
1655
fpr = ctypes.string_at(buf, buf_len.value)
1656
# Convert the bytestring to hexadecimal notation
1657
hex_fpr = binascii.hexlify(fpr).upper()
1658
return hex_fpr
1659
1660
1661
class MultiprocessingMixIn(object):
1662
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1663
def sub_process_main(self, request, address):
1664
try:
1665
self.finish_request(request, address)
1666
except:
1667
self.handle_error(request, address)
1668
self.close_request(request)
1669
1670
def process_request(self, request, address):
1671
"""Start a new process to process the request."""
1672
proc = multiprocessing.Process(target = self.sub_process_main,
1673
args = (request,
1674
address))
1675
proc.start()
1676
return proc
1677
1678
1679
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1680
""" adds a pipe to the MixIn """
1681
def process_request(self, request, client_address):
1682
"""Overrides and wraps the original process_request().
1683
1684
This function creates a new pipe in self.pipe
1685
"""
1686
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1687
1688
proc = MultiprocessingMixIn.process_request(self, request,
1689
client_address)
1690
self.child_pipe.close()
1691
self.add_pipe(parent_pipe, proc)
1692
1693
def add_pipe(self, parent_pipe, proc):
1694
"""Dummy function; override as necessary"""
1695
raise NotImplementedError
1696
1697
1698
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1699
socketserver.TCPServer, object):
1700
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1701
518
1702
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1703
enabled: Boolean; whether this server is activated yet
1704
interface: None or a network interface name (string)
1705
use_ipv6: Boolean; to use IPv6 or not
522
1706
"""
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
1707
def __init__(self, server_address, RequestHandlerClass,
1708
interface=None, use_ipv6=True):
1709
self.interface = interface
1710
if use_ipv6:
1711
self.address_family = socket.AF_INET6
1712
socketserver.TCPServer.__init__(self, server_address,
1713
RequestHandlerClass)
533
1714
def server_bind(self):
534
1715
"""This overrides the normal server_bind() function
535
1716
to bind to an interface if one was specified, and also NOT to
536
1717
bind to an address or port if they were not specified."""
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
1718
if self.interface is not None:
1719
if SO_BINDTODEVICE is None:
1720
logger.error("SO_BINDTODEVICE does not exist;"
1721
" cannot bind to interface %s",
1722
self.interface)
1723
else:
1724
try:
1725
self.socket.setsockopt(socket.SOL_SOCKET,
1726
SO_BINDTODEVICE,
1727
str(self.interface
1728
+ '\0'))
1729
except socket.error as error:
1730
if error[0] == errno.EPERM:
1731
logger.error("No permission to"
1732
" bind to interface %s",
1733
self.interface)
1734
elif error[0] == errno.ENOPROTOOPT:
1735
logger.error("SO_BINDTODEVICE not available;"
1736
" cannot bind to interface %s",
1737
self.interface)
1738
else:
1739
raise
551
1740
# Only bind(2) the socket if we really need to.
552
1741
if self.server_address[0] or self.server_address[1]:
553
1742
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1743
if self.address_family == socket.AF_INET6:
1744
any_address = "::" # in6addr_any
1745
else:
1746
any_address = socket.INADDR_ANY
1747
self.server_address = (any_address,
556
1748
self.server_address[1])
557
1749
elif not self.server_address[1]:
558
1750
self.server_address = (self.server_address[0],
559
1751
0)
560
# if self.settings["interface"]:
1752
# if self.interface:
561
1753
# self.server_address = (self.server_address[0],
562
1754
# 0, # port
563
1755
# 0, # flowinfo
564
1756
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1757
# (self.interface))
1758
return socketserver.TCPServer.server_bind(self)
1759
1760
1761
class MandosServer(IPv6_TCPServer):
1762
"""Mandos server.
1763
1764
Attributes:
1765
clients: set of Client objects
1766
gnutls_priority GnuTLS priority string
1767
use_dbus: Boolean; to emit D-Bus signals or not
1768
1769
Assumes a gobject.MainLoop event loop.
1770
"""
1771
def __init__(self, server_address, RequestHandlerClass,
1772
interface=None, use_ipv6=True, clients=None,
1773
gnutls_priority=None, use_dbus=True):
1774
self.enabled = False
1775
self.clients = clients
1776
if self.clients is None:
1777
self.clients = {}
1778
self.use_dbus = use_dbus
1779
self.gnutls_priority = gnutls_priority
1780
IPv6_TCPServer.__init__(self, server_address,
1781
RequestHandlerClass,
1782
interface = interface,
1783
use_ipv6 = use_ipv6)
568
1784
def server_activate(self):
569
1785
if self.enabled:
570
return super(type(self), self).server_activate()
1786
return socketserver.TCPServer.server_activate(self)
1787
571
1788
def enable(self):
572
1789
self.enabled = True
1790
1791
def add_pipe(self, parent_pipe, proc):
1792
# Call "handle_ipc" for both data and EOF events
1793
gobject.io_add_watch(parent_pipe.fileno(),
1794
gobject.IO_IN | gobject.IO_HUP,
1795
functools.partial(self.handle_ipc,
1796
parent_pipe =
1797
parent_pipe,
1798
proc = proc))
1799
1800
def handle_ipc(self, source, condition, parent_pipe=None,
1801
proc = None, client_object=None):
1802
condition_names = {
1803
gobject.IO_IN: "IN", # There is data to read.
1804
gobject.IO_OUT: "OUT", # Data can be written (without
1805
# blocking).
1806
gobject.IO_PRI: "PRI", # There is urgent data to read.
1807
gobject.IO_ERR: "ERR", # Error condition.
1808
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1809
# broken, usually for pipes and
1810
# sockets).
1811
}
1812
conditions_string = ' | '.join(name
1813
for cond, name in
1814
condition_names.iteritems()
1815
if cond & condition)
1816
# error, or the other end of multiprocessing.Pipe has closed
1817
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1818
# Wait for other process to exit
1819
proc.join()
1820
return False
1821
1822
# Read a request from the child
1823
request = parent_pipe.recv()
1824
command = request[0]
1825
1826
if command == 'init':
1827
fpr = request[1]
1828
address = request[2]
1829
1830
for c in self.clients.itervalues():
1831
if c.fingerprint == fpr:
1832
client = c
1833
break
1834
else:
1835
logger.info("Client not found for fingerprint: %s, ad"
1836
"dress: %s", fpr, address)
1837
if self.use_dbus:
1838
# Emit D-Bus signal
1839
mandos_dbus_service.ClientNotFound(fpr,
1840
address[0])
1841
parent_pipe.send(False)
1842
return False
1843
1844
gobject.io_add_watch(parent_pipe.fileno(),
1845
gobject.IO_IN | gobject.IO_HUP,
1846
functools.partial(self.handle_ipc,
1847
parent_pipe =
1848
parent_pipe,
1849
proc = proc,
1850
client_object =
1851
client))
1852
parent_pipe.send(True)
1853
# remove the old hook in favor of the new above hook on
1854
# same fileno
1855
return False
1856
if command == 'funcall':
1857
funcname = request[1]
1858
args = request[2]
1859
kwargs = request[3]
1860
1861
parent_pipe.send(('data', getattr(client_object,
1862
funcname)(*args,
1863
**kwargs)))
1864
1865
if command == 'getattr':
1866
attrname = request[1]
1867
if callable(client_object.__getattribute__(attrname)):
1868
parent_pipe.send(('function',))
1869
else:
1870
parent_pipe.send(('data', client_object
1871
.__getattribute__(attrname)))
1872
1873
if command == 'setattr':
1874
attrname = request[1]
1875
value = request[2]
1876
setattr(client_object, attrname, value)
1877
1878
return True
573
1879
574
1880
575
1881
def string_to_delta(interval):
576
1882
"""Parse a string and return a datetime.timedelta
577
1883
578
1884
>>> string_to_delta('7d')
579
1885
datetime.timedelta(7)
580
1886
>>> string_to_delta('60s')
583
1889
datetime.timedelta(0, 3600)
584
1890
>>> string_to_delta('24h')
585
1891
datetime.timedelta(1)
586
>>> string_to_delta(u'1w')
1892
>>> string_to_delta('1w')
587
1893
datetime.timedelta(7)
588
1894
>>> string_to_delta('5m 30s')
589
1895
datetime.timedelta(0, 330)
591
1897
timevalue = datetime.timedelta(0)
592
1898
for s in interval.split():
593
1899
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
1900
suffix = unicode(s[-1])
1901
value = int(s[:-1])
1902
if suffix == "d":
597
1903
delta = datetime.timedelta(value)
598
elif suffix == u"s":
1904
elif suffix == "s":
599
1905
delta = datetime.timedelta(0, value)
600
elif suffix == u"m":
1906
elif suffix == "m":
601
1907
delta = datetime.timedelta(0, 0, 0, 0, value)
602
elif suffix == u"h":
1908
elif suffix == "h":
603
1909
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
604
elif suffix == u"w":
1910
elif suffix == "w":
605
1911
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
1912
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
1913
raise ValueError("Unknown suffix %r" % suffix)
1914
except (ValueError, IndexError) as e:
1915
raise ValueError(*(e.args))
610
1916
timevalue += delta
611
1917
return timevalue
612
1918
613
1919
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
637
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
639
global if_nametoindex
640
try:
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
645
except (OSError, AttributeError):
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
650
def if_nametoindex(interface):
651
"Get an interface index the hard way, i.e. using fcntl()"
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
658
return interface_index
659
return if_nametoindex(interface)
660
661
662
1920
def daemon(nochdir = False, noclose = False):
663
1921
"""See daemon(3). Standard BSD Unix function.
1922
664
1923
This should really exist as os.daemon, but it doesn't (yet)."""
665
1924
if os.fork():
666
1925
sys.exit()
674
1933
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
675
1934
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
1935
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
1936
"%s not a character device"
1937
% os.path.devnull)
678
1938
os.dup2(null, sys.stdin.fileno())
679
1939
os.dup2(null, sys.stdout.fileno())
680
1940
os.dup2(null, sys.stderr.fileno())
683
1943
684
1944
685
1945
def main():
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
1946
1947
##################################################################
1948
# Parsing of options, both command line and config file
1949
1950
parser = argparse.ArgumentParser()
1951
parser.add_argument("-v", "--version", action="version",
1952
version = "%%(prog)s %s" % version,
1953
help="show version number and exit")
1954
parser.add_argument("-i", "--interface", metavar="IF",
1955
help="Bind to interface IF")
1956
parser.add_argument("-a", "--address",
1957
help="Address to listen for requests on")
1958
parser.add_argument("-p", "--port", type=int,
1959
help="Port number to receive requests on")
1960
parser.add_argument("--check", action="store_true",
1961
help="Run self-test")
1962
parser.add_argument("--debug", action="store_true",
1963
help="Debug mode; run in foreground and log"
1964
" to terminal")
1965
parser.add_argument("--debuglevel", metavar="LEVEL",
1966
help="Debug level for stdout output")
1967
parser.add_argument("--priority", help="GnuTLS"
1968
" priority string (see GnuTLS documentation)")
1969
parser.add_argument("--servicename",
1970
metavar="NAME", help="Zeroconf service name")
1971
parser.add_argument("--configdir",
1972
default="/etc/mandos", metavar="DIR",
1973
help="Directory to search for configuration"
1974
" files")
1975
parser.add_argument("--no-dbus", action="store_false",
1976
dest="use_dbus", help="Do not provide D-Bus"
1977
" system bus interface")
1978
parser.add_argument("--no-ipv6", action="store_false",
1979
dest="use_ipv6", help="Do not use IPv6")
1980
parser.add_argument("--no-restore", action="store_false",
1981
dest="restore", help="Do not restore stored"
1982
" state")
1983
parser.add_argument("--statedir", metavar="DIR",
1984
help="Directory to save/restore state in")
1985
1986
options = parser.parse_args()
710
1987
711
1988
if options.check:
712
1989
import doctest
721
1998
"priority":
722
1999
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
2000
"servicename": "Mandos",
2001
"use_dbus": "True",
2002
"use_ipv6": "True",
2003
"debuglevel": "",
2004
"restore": "True",
2005
"statedir": "/var/lib/mandos"
724
2006
}
725
2007
726
2008
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
2009
server_config = configparser.SafeConfigParser(server_defaults)
728
2010
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2011
server_config.read(os.path.join(options.configdir,
2012
"mandos.conf"))
730
2013
# Convert the SafeConfigParser object to a dict
731
2014
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
2015
# Use the appropriate methods on the non-string config options
2016
for option in ("debug", "use_dbus", "use_ipv6"):
2017
server_settings[option] = server_config.getboolean("DEFAULT",
2018
option)
2019
if server_settings["port"]:
2020
server_settings["port"] = server_config.getint("DEFAULT",
2021
"port")
735
2022
del server_config
736
2023
737
2024
# Override the settings from the config file with command line
738
2025
# options, if set.
739
2026
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
2027
"priority", "servicename", "configdir",
2028
"use_dbus", "use_ipv6", "debuglevel", "restore",
2029
"statedir"):
741
2030
value = getattr(options, option)
742
2031
if value is not None:
743
2032
server_settings[option] = value
744
2033
del options
2034
# Force all strings to be unicode
2035
for option in server_settings.keys():
2036
if type(server_settings[option]) is str:
2037
server_settings[option] = unicode(server_settings[option])
745
2038
# Now we have our good server settings in "server_settings"
746
2039
2040
##################################################################
2041
2042
# For convenience
747
2043
debug = server_settings["debug"]
2044
debuglevel = server_settings["debuglevel"]
2045
use_dbus = server_settings["use_dbus"]
2046
use_ipv6 = server_settings["use_ipv6"]
2047
stored_state_path = os.path.join(server_settings["statedir"],
2048
stored_state_file)
748
2049
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
2050
if debug:
2051
initlogger(logging.DEBUG)
2052
else:
2053
if not debuglevel:
2054
initlogger()
2055
else:
2056
level = getattr(logging, debuglevel.upper())
2057
initlogger(level)
752
2058
753
2059
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
2060
syslogger.setFormatter(logging.Formatter
2061
('Mandos (%s) [%%(process)d]:'
2062
' %%(levelname)s: %%(message)s'
757
2063
% server_settings["servicename"]))
758
2064
759
2065
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
2066
client_defaults = { "timeout": "5m",
2067
"extended_timeout": "15m",
2068
"interval": "2m",
2069
"checker": "fping -q -- %%(host)s",
763
2070
"host": "",
2071
"approval_delay": "0s",
2072
"approval_duration": "1s",
764
2073
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
2074
client_config = configparser.SafeConfigParser(client_defaults)
766
2075
client_config.read(os.path.join(server_settings["configdir"],
767
2076
"clients.conf"))
768
2077
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
2078
global mandos_dbus_service
2079
mandos_dbus_service = None
2080
2081
tcp_server = MandosServer((server_settings["address"],
2082
server_settings["port"]),
2083
ClientHandler,
2084
interface=(server_settings["interface"]
2085
or None),
2086
use_ipv6=use_ipv6,
2087
gnutls_priority=
2088
server_settings["priority"],
2089
use_dbus=use_dbus)
2090
if not debug:
2091
pidfilename = "/var/run/mandos.pid"
2092
try:
2093
pidfile = open(pidfilename, "w")
2094
except IOError:
2095
logger.error("Could not open file %r", pidfilename)
2096
2097
try:
2098
uid = pwd.getpwnam("_mandos").pw_uid
2099
gid = pwd.getpwnam("_mandos").pw_gid
2100
except KeyError:
2101
try:
2102
uid = pwd.getpwnam("mandos").pw_uid
2103
gid = pwd.getpwnam("mandos").pw_gid
2104
except KeyError:
2105
try:
2106
uid = pwd.getpwnam("nobody").pw_uid
2107
gid = pwd.getpwnam("nobody").pw_gid
2108
except KeyError:
2109
uid = 65534
2110
gid = 65534
2111
try:
2112
os.setgid(gid)
798
2113
os.setuid(uid)
799
os.setgid(gid)
800
except OSError, error:
2114
except OSError as error:
801
2115
if error[0] != errno.EPERM:
802
2116
raise error
803
2117
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
2118
if debug:
2119
# Enable all possible GnuTLS debugging
2120
2121
# "Use a log level over 10 to enable all debugging options."
2122
# - GnuTLS manual
2123
gnutls.library.functions.gnutls_global_set_log_level(11)
2124
2125
@gnutls.library.types.gnutls_log_func
2126
def debug_gnutls(level, string):
2127
logger.debug("GnuTLS: %s", string[:-1])
2128
2129
(gnutls.library.functions
2130
.gnutls_global_set_log_function(debug_gnutls))
2131
2132
# Redirect stdin so all checkers get /dev/null
2133
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2134
os.dup2(null, sys.stdin.fileno())
2135
if null > 2:
2136
os.close(null)
2137
else:
2138
# No console logging
2139
logger.removeHandler(console)
2140
2141
# Need to fork before connecting to D-Bus
2142
if not debug:
2143
# Close all input and output, do double fork, etc.
2144
daemon()
810
2145
811
2146
global main_loop
812
global bus
813
global server
814
2147
# From the Avahi example code
815
2148
DBusGMainLoop(set_as_default=True )
816
2149
main_loop = gobject.MainLoop()
817
2150
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
2151
# End of Avahi example code
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
837
838
if debug:
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
842
if null > 2:
843
os.close(null)
844
else:
845
# No console logging
846
logger.removeHandler(console)
847
# Close all input and output, do double fork, etc.
848
daemon()
849
850
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
854
del pidfile
855
except IOError, err:
856
logger.error(u"Could not write to file %r with PID %d",
857
pidfilename, pid)
858
except NameError:
859
# "pidfile" was never created
860
pass
861
del pidfilename
2152
if use_dbus:
2153
try:
2154
bus_name = dbus.service.BusName("se.recompile.Mandos",
2155
bus, do_not_queue=True)
2156
old_bus_name = (dbus.service.BusName
2157
("se.bsnet.fukt.Mandos", bus,
2158
do_not_queue=True))
2159
except dbus.exceptions.NameExistsException as e:
2160
logger.error(unicode(e) + ", disabling D-Bus")
2161
use_dbus = False
2162
server_settings["use_dbus"] = False
2163
tcp_server.use_dbus = False
2164
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2165
service = AvahiServiceToSyslog(name =
2166
server_settings["servicename"],
2167
servicetype = "_mandos._tcp",
2168
protocol = protocol, bus = bus)
2169
if server_settings["interface"]:
2170
service.interface = (if_nametoindex
2171
(str(server_settings["interface"])))
2172
2173
global multiprocessing_manager
2174
multiprocessing_manager = multiprocessing.Manager()
2175
2176
client_class = Client
2177
if use_dbus:
2178
client_class = functools.partial(ClientDBusTransitional,
2179
bus = bus)
2180
2181
special_settings = {
2182
# Some settings need to be accessd by special methods;
2183
# booleans need .getboolean(), etc. Here is a list of them:
2184
"approved_by_default":
2185
lambda section:
2186
client_config.getboolean(section, "approved_by_default"),
2187
"enabled":
2188
lambda section:
2189
client_config.getboolean(section, "enabled"),
2190
}
2191
# Construct a new dict of client settings of this form:
2192
# { client_name: {setting_name: value, ...}, ...}
2193
# with exceptions for any special settings as defined above
2194
client_settings = dict((clientname,
2195
dict((setting,
2196
(value
2197
if setting not in special_settings
2198
else special_settings[setting]
2199
(clientname)))
2200
for setting, value in
2201
client_config.items(clientname)))
2202
for clientname in client_config.sections())
2203
2204
old_client_settings = {}
2205
clients_data = []
2206
2207
# Get client data and settings from last running state.
2208
if server_settings["restore"]:
2209
try:
2210
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
2213
os.remove(stored_state_path)
2214
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2218
raise
2219
2220
with Crypto() as crypt:
2221
for client in clients_data:
2222
client_name = client["name"]
2223
2224
# Decide which value to use after restoring saved state.
2225
# We have three different values: Old config file,
2226
# new config file, and saved state.
2227
# New config value takes precedence if it differs from old
2228
# config value, otherwise use saved state.
2229
for name, value in client_settings[client_name].items():
2230
try:
2231
# For each value in new config, check if it
2232
# differs from the old config value (Except for
2233
# the "secret" attribute)
2234
if (name != "secret" and
2235
value != old_client_settings[client_name]
2236
[name]):
2237
setattr(client, name, value)
2238
except KeyError:
2239
pass
2240
2241
# Clients who has passed its expire date can still be
2242
# enabled if its last checker was sucessful. Clients
2243
# whose checker failed before we stored its state is
2244
# assumed to have failed all checkers during downtime.
2245
if client["enabled"] and client["last_checked_ok"]:
2246
if ((datetime.datetime.utcnow()
2247
- client["last_checked_ok"])
2248
> client["interval"]):
2249
if client["last_checker_status"] != 0:
2250
client["enabled"] = False
2251
else:
2252
client["expires"] = (datetime.datetime
2253
.utcnow()
2254
+ client["timeout"])
2255
2256
client["changedstate"] = (multiprocessing_manager
2257
.Condition
2258
(multiprocessing_manager
2259
.Lock()))
2260
if use_dbus:
2261
new_client = (ClientDBusTransitional.__new__
2262
(ClientDBusTransitional))
2263
tcp_server.clients[client_name] = new_client
2264
new_client.bus = bus
2265
for name, value in client.iteritems():
2266
setattr(new_client, name, value)
2267
client_object_name = unicode(client_name).translate(
2268
{ord("."): ord("_"),
2269
ord("-"): ord("_")})
2270
new_client.dbus_object_path = (dbus.ObjectPath
2271
("/clients/"
2272
+ client_object_name))
2273
DBusObjectWithProperties.__init__(new_client,
2274
new_client.bus,
2275
new_client
2276
.dbus_object_path)
2277
else:
2278
tcp_server.clients[client_name] = (Client.__new__
2279
(Client))
2280
for name, value in client.iteritems():
2281
setattr(tcp_server.clients[client_name],
2282
name, value)
2283
2284
try:
2285
tcp_server.clients[client_name].secret = (
2286
crypt.decrypt(tcp_server.clients[client_name]
2287
.encrypted_secret,
2288
client_settings[client_name]
2289
["secret"]))
2290
except CryptoError:
2291
# If decryption fails, we use secret from new settings
2292
tcp_server.clients[client_name].secret = (
2293
client_settings[client_name]["secret"])
2294
2295
# Create/remove clients based on new changes made to config
2296
for clientname in set(old_client_settings) - set(client_settings):
2297
del tcp_server.clients[clientname]
2298
for clientname in set(client_settings) - set(old_client_settings):
2299
tcp_server.clients[clientname] = (client_class(name
2300
= clientname,
2301
config =
2302
client_settings
2303
[clientname]))
2304
2305
if not tcp_server.clients:
2306
logger.warning("No clients defined")
2307
2308
if not debug:
2309
try:
2310
with pidfile:
2311
pid = os.getpid()
2312
pidfile.write(str(pid) + "\n".encode("utf-8"))
2313
del pidfile
2314
except IOError:
2315
logger.error("Could not write to file %r with PID %d",
2316
pidfilename, pid)
2317
except NameError:
2318
# "pidfile" was never created
2319
pass
2320
del pidfilename
2321
2322
signal.signal(signal.SIGINT, signal.SIG_IGN)
2323
2324
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2325
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2326
2327
if use_dbus:
2328
class MandosDBusService(dbus.service.Object):
2329
"""A D-Bus proxy object"""
2330
def __init__(self):
2331
dbus.service.Object.__init__(self, bus, "/")
2332
_interface = "se.recompile.Mandos"
2333
2334
@dbus.service.signal(_interface, signature="o")
2335
def ClientAdded(self, objpath):
2336
"D-Bus signal"
2337
pass
2338
2339
@dbus.service.signal(_interface, signature="ss")
2340
def ClientNotFound(self, fingerprint, address):
2341
"D-Bus signal"
2342
pass
2343
2344
@dbus.service.signal(_interface, signature="os")
2345
def ClientRemoved(self, objpath, name):
2346
"D-Bus signal"
2347
pass
2348
2349
@dbus.service.method(_interface, out_signature="ao")
2350
def GetAllClients(self):
2351
"D-Bus method"
2352
return dbus.Array(c.dbus_object_path
2353
for c in
2354
tcp_server.clients.itervalues())
2355
2356
@dbus.service.method(_interface,
2357
out_signature="a{oa{sv}}")
2358
def GetAllClientsWithProperties(self):
2359
"D-Bus method"
2360
return dbus.Dictionary(
2361
((c.dbus_object_path, c.GetAll(""))
2362
for c in tcp_server.clients.itervalues()),
2363
signature="oa{sv}")
2364
2365
@dbus.service.method(_interface, in_signature="o")
2366
def RemoveClient(self, object_path):
2367
"D-Bus method"
2368
for c in tcp_server.clients.itervalues():
2369
if c.dbus_object_path == object_path:
2370
del tcp_server.clients[c.name]
2371
c.remove_from_connection()
2372
# Don't signal anything except ClientRemoved
2373
c.disable(quiet=True)
2374
# Emit D-Bus signal
2375
self.ClientRemoved(object_path, c.name)
2376
return
2377
raise KeyError(object_path)
2378
2379
del _interface
2380
2381
class MandosDBusServiceTransitional(MandosDBusService):
2382
__metaclass__ = AlternateDBusNamesMetaclass
2383
mandos_dbus_service = MandosDBusServiceTransitional()
862
2384
863
2385
def cleanup():
864
2386
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
871
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
2387
service.cleanup()
2388
2389
multiprocessing.active_children()
2390
if not (tcp_server.clients or client_settings):
2391
return
2392
2393
# Store client before exiting. Secrets are encrypted with key
2394
# based on what config file has. If config file is
2395
# removed/edited, old secret will thus be unrecovable.
2396
clients = []
2397
with Crypto() as crypt:
2398
for client in tcp_server.clients.itervalues():
2399
key = client_settings[client.name]["secret"]
2400
client.encrypted_secret = crypt.encrypt(client.secret,
2401
key)
2402
client_dict = {}
2403
2404
# A list of attributes that will not be stored when
2405
# shutting down.
2406
exclude = set(("bus", "changedstate", "secret"))
2407
for name, typ in (inspect.getmembers
2408
(dbus.service.Object)):
2409
exclude.add(name)
2410
2411
client_dict["encrypted_secret"] = (client
2412
.encrypted_secret)
2413
for attr in client.client_structure:
2414
if attr not in exclude:
2415
client_dict[attr] = getattr(client, attr)
2416
2417
clients.append(client_dict)
2418
del client_settings[client.name]["secret"]
2419
2420
try:
2421
with os.fdopen(os.open(stored_state_path,
2422
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2423
0600), "wb") as stored_state:
2424
pickle.dump((clients, client_settings), stored_state)
2425
except (IOError, OSError) as e:
2426
logger.warning("Could not save persistent state: {0}"
2427
.format(e))
2428
if e.errno not in (errno.ENOENT, errno.EACCES):
2429
raise
2430
2431
# Delete all clients, and settings from config
2432
while tcp_server.clients:
2433
name, client = tcp_server.clients.popitem()
2434
if use_dbus:
2435
client.remove_from_connection()
2436
# Don't signal anything except ClientRemoved
2437
client.disable(quiet=True)
2438
if use_dbus:
2439
# Emit D-Bus signal
2440
mandos_dbus_service.ClientRemoved(client
2441
.dbus_object_path,
2442
client.name)
2443
client_settings.clear()
876
2444
877
2445
atexit.register(cleanup)
878
2446
879
if not debug:
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
884
for client in clients:
885
client.start()
2447
for client in tcp_server.clients.itervalues():
2448
if use_dbus:
2449
# Emit D-Bus signal
2450
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2451
# Need to initiate checking of clients
2452
if client.enabled:
2453
client.init_checker()
886
2454
887
2455
tcp_server.enable()
888
2456
tcp_server.server_activate()
889
2457
890
2458
# Find out what port we got
891
2459
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
2460
if use_ipv6:
2461
logger.info("Now listening on address %r, port %d,"
2462
" flowinfo %d, scope_id %d"
2463
% tcp_server.socket.getsockname())
2464
else: # IPv4
2465
logger.info("Now listening on address %r, port %d"
2466
% tcp_server.socket.getsockname())
894
2467
895
2468
#service.interface = tcp_server.socket.getsockname()[3]
896
2469
897
2470
try:
898
2471
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
2472
try:
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
2473
service.activate()
2474
except dbus.exceptions.DBusException as error:
2475
logger.critical("DBusException: %s", error)
2476
cleanup()
904
2477
sys.exit(1)
905
2478
# End of Avahi example code
906
2479
907
2480
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
2481
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2482
(tcp_server.handle_request
2483
(*args[2:], **kwargs) or True))
911
2484
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
2485
logger.debug("Starting main loop")
914
2486
main_loop.run()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2487
except AvahiError as error:
2488
logger.critical("AvahiError: %s", error)
2489
cleanup()
917
2490
sys.exit(1)
918
2491
except KeyboardInterrupt:
919
2492
if debug:
920
print
2493
print("", file=sys.stderr)
2494
logger.debug("Server received KeyboardInterrupt")
2495
logger.debug("Server exiting")
2496
# Must run before the D-Bus bus name gets deregistered
2497
cleanup()
2498
921
2499
922
2500
if __name__ == '__main__':
923
2501
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0