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- Committer: Teddy Hogeborn
- Date: 2012-03-08 21:57:33 UTC
- mto: This revision was merged to the branch mainline in revision 562.
- Revision ID: teddy@recompile.se-20120308215733-8pz2o2lbuc19e9uc
Add D-Bus annotations support to methods, signals and properties.
* mandos (dbus_annotations): New; decorator to add annotations.
(DBusObjectWithProperties._get_all_dbus_things): Bug fix: return
normal name if no
"_dbus_name"
attribute.
(DBusObjectWithProperties.Introspect): Add annotation tags.
(AlternateDBusNamesMetaclass.__new__): Copy annotations.
* mandos (dbus_annotations): New; decorator to add annotations.
(DBusObjectWithProperties._get_all_dbus_things): Bug fix: return
normal name if no
"_dbus_name"
attribute.
(DBusObjectWithProperties.Introspect): Add annotation tags.
(AlternateDBusNamesMetaclass.__new__): Copy annotations.
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files removed:
- etc-plugins.d-README
- 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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
15
16
#
16
17
# 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
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# along with this program. If not, see
28
29
# <http://www.gnu.org/licenses/>.
29
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#
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
55
55
import stat
56
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import logging
57
57
import logging.handlers
58
58
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
67
import tempfile
68
import itertools
59
69
60
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import dbus
71
import dbus.service
61
72
import gobject
62
73
import avahi
63
74
from dbus.mainloop.glib import DBusGMainLoop
64
75
import ctypes
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
74
logger.addHandler(syslogger)
75
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
79
logger.addHandler(console)
76
import ctypes.util
77
import xml.dom.minidom
78
import inspect
79
import GnuPGInterface
80
81
try:
82
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
83
except AttributeError:
84
try:
85
from IN import SO_BINDTODEVICE
86
except ImportError:
87
SO_BINDTODEVICE = None
88
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version = "1.5.3"
90
stored_state_file = "clients.pickle"
91
92
logger = logging.getLogger()
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
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
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def initlogger(debug, 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)
121
122
if debug:
123
console = logging.StreamHandler()
124
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
125
' [%(process)d]:'
126
' %(levelname)s:'
127
' %(message)s'))
128
logger.addHandler(console)
129
logger.setLevel(level)
130
131
132
class PGPError(Exception):
133
"""Exception if encryption/decryption fails"""
134
pass
135
136
137
class PGPEngine(object):
138
"""A simple class for OpenPGP symmetric encryption & decryption"""
139
def __init__(self):
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
142
self.gnupg = GnuPGInterface.GnuPG()
143
self.gnupg.options.meta_interactive = False
144
self.gnupg.options.homedir = self.tempdir
145
self.gnupg.options.extra_args.extend(['--force-mdc',
146
'--quiet',
147
'--no-use-agent'])
148
149
def __enter__(self):
150
return self
151
152
def __exit__ (self, exc_type, exc_value, traceback):
153
self._cleanup()
154
return False
155
156
def __del__(self):
157
self._cleanup()
158
159
def _cleanup(self):
160
if self.tempdir is not None:
161
# Delete contents of tempdir
162
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
164
for filename in files:
165
os.remove(os.path.join(root, filename))
166
for dirname in dirs:
167
os.rmdir(os.path.join(root, dirname))
168
# Remove tempdir
169
os.rmdir(self.tempdir)
170
self.tempdir = None
171
172
def password_encode(self, password):
173
# Passphrase can not be empty and can not contain newlines or
174
# NUL bytes. So we prefix it and hex encode it.
175
return b"mandos" + binascii.hexlify(password)
176
177
def encrypt(self, data, password):
178
self.gnupg.passphrase = self.password_encode(password)
179
with open(os.devnull, "w") as devnull:
180
try:
181
proc = self.gnupg.run(['--symmetric'],
182
create_fhs=['stdin', 'stdout'],
183
attach_fhs={'stderr': devnull})
184
with contextlib.closing(proc.handles['stdin']) as f:
185
f.write(data)
186
with contextlib.closing(proc.handles['stdout']) as f:
187
ciphertext = f.read()
188
proc.wait()
189
except IOError as e:
190
raise PGPError(e)
191
self.gnupg.passphrase = None
192
return ciphertext
193
194
def decrypt(self, data, password):
195
self.gnupg.passphrase = self.password_encode(password)
196
with open(os.devnull, "w") as devnull:
197
try:
198
proc = self.gnupg.run(['--decrypt'],
199
create_fhs=['stdin', 'stdout'],
200
attach_fhs={'stderr': devnull})
201
with contextlib.closing(proc.handles['stdin']) as f:
202
f.write(data)
203
with contextlib.closing(proc.handles['stdout']) as f:
204
decrypted_plaintext = f.read()
205
proc.wait()
206
except IOError as e:
207
raise PGPError(e)
208
self.gnupg.passphrase = None
209
return decrypted_plaintext
210
211
80
212
81
213
class AvahiError(Exception):
82
def __init__(self, value):
214
def __init__(self, value, *args, **kwargs):
83
215
self.value = value
84
def __str__(self):
85
return repr(self.value)
216
super(AvahiError, self).__init__(value, *args, **kwargs)
217
def __unicode__(self):
218
return unicode(repr(self.value))
86
219
87
220
class AvahiServiceError(AvahiError):
88
221
pass
93
226
94
227
class AvahiService(object):
95
228
"""An Avahi (Zeroconf) service.
229
96
230
Attributes:
97
231
interface: integer; avahi.IF_UNSPEC or an interface index.
98
232
Used to optionally bind to the specified interface.
106
240
max_renames: integer; maximum number of renames
107
241
rename_count: integer; counter so we only rename after collisions
108
242
a sensible number of times
243
group: D-Bus Entry Group
244
server: D-Bus Server
245
bus: dbus.SystemBus()
109
246
"""
110
247
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
248
servicetype = None, port = None, TXT = None,
249
domain = "", host = "", max_renames = 32768,
250
protocol = avahi.PROTO_UNSPEC, bus = None):
113
251
self.interface = interface
114
252
self.name = name
115
self.type = type
253
self.type = servicetype
116
254
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
255
self.TXT = TXT if TXT is not None else []
121
256
self.domain = domain
122
257
self.host = host
123
258
self.rename_count = 0
124
259
self.max_renames = max_renames
260
self.protocol = protocol
261
self.group = None # our entry group
262
self.server = None
263
self.bus = bus
264
self.entry_group_state_changed_match = None
125
265
def rename(self):
126
266
"""Derived from the Avahi example code"""
127
267
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)
268
logger.critical("No suitable Zeroconf service name found"
269
" after %i retries, exiting.",
270
self.rename_count)
131
271
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))
272
self.name = unicode(self.server
273
.GetAlternativeServiceName(self.name))
274
logger.info("Changing Zeroconf service name to %r ...",
275
self.name)
138
276
self.remove()
139
self.add()
277
try:
278
self.add()
279
except dbus.exceptions.DBusException as error:
280
logger.critical("DBusException: %s", error)
281
self.cleanup()
282
os._exit(1)
140
283
self.rename_count += 1
141
284
def remove(self):
142
285
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
286
if self.entry_group_state_changed_match is not None:
287
self.entry_group_state_changed_match.remove()
288
self.entry_group_state_changed_match = None
289
if self.group is not None:
290
self.group.Reset()
145
291
def add(self):
146
292
"""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
293
self.remove()
294
if self.group is None:
295
self.group = dbus.Interface(
296
self.bus.get_object(avahi.DBUS_NAME,
297
self.server.EntryGroupNew()),
298
avahi.DBUS_INTERFACE_ENTRY_GROUP)
299
self.entry_group_state_changed_match = (
300
self.group.connect_to_signal(
301
'StateChanged', self.entry_group_state_changed))
302
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
303
self.name, self.type)
304
self.group.AddService(
305
self.interface,
306
self.protocol,
307
dbus.UInt32(0), # flags
308
self.name, self.type,
309
self.domain, self.host,
310
dbus.UInt16(self.port),
311
avahi.string_array_to_txt_array(self.TXT))
312
self.group.Commit()
313
def entry_group_state_changed(self, state, error):
314
"""Derived from the Avahi example code"""
315
logger.debug("Avahi entry group state change: %i", state)
316
317
if state == avahi.ENTRY_GROUP_ESTABLISHED:
318
logger.debug("Zeroconf service established.")
319
elif state == avahi.ENTRY_GROUP_COLLISION:
320
logger.info("Zeroconf service name collision.")
321
self.rename()
322
elif state == avahi.ENTRY_GROUP_FAILURE:
323
logger.critical("Avahi: Error in group state changed %s",
324
unicode(error))
325
raise AvahiGroupError("State changed: %s"
326
% unicode(error))
327
def cleanup(self):
328
"""Derived from the Avahi example code"""
329
if self.group is not None:
330
try:
331
self.group.Free()
332
except (dbus.exceptions.UnknownMethodException,
333
dbus.exceptions.DBusException):
334
pass
335
self.group = None
336
self.remove()
337
def server_state_changed(self, state, error=None):
338
"""Derived from the Avahi example code"""
339
logger.debug("Avahi server state change: %i", state)
340
bad_states = { avahi.SERVER_INVALID:
341
"Zeroconf server invalid",
342
avahi.SERVER_REGISTERING: None,
343
avahi.SERVER_COLLISION:
344
"Zeroconf server name collision",
345
avahi.SERVER_FAILURE:
346
"Zeroconf server failure" }
347
if state in bad_states:
348
if bad_states[state] is not None:
349
if error is None:
350
logger.error(bad_states[state])
351
else:
352
logger.error(bad_states[state] + ": %r", error)
353
self.cleanup()
354
elif state == avahi.SERVER_RUNNING:
355
self.add()
356
else:
357
if error is None:
358
logger.debug("Unknown state: %r", state)
359
else:
360
logger.debug("Unknown state: %r: %r", state, error)
361
def activate(self):
362
"""Derived from the Avahi example code"""
363
if self.server is None:
364
self.server = dbus.Interface(
365
self.bus.get_object(avahi.DBUS_NAME,
366
avahi.DBUS_PATH_SERVER,
367
follow_name_owner_changes=True),
368
avahi.DBUS_INTERFACE_SERVER)
369
self.server.connect_to_signal("StateChanged",
370
self.server_state_changed)
371
self.server_state_changed(self.server.GetState())
372
373
class AvahiServiceToSyslog(AvahiService):
374
def rename(self):
375
"""Add the new name to the syslog messages"""
376
ret = AvahiService.rename(self)
377
syslogger.setFormatter(logging.Formatter
378
('Mandos (%s) [%%(process)d]:'
379
' %%(levelname)s: %%(message)s'
380
% self.name))
381
return ret
382
383
def timedelta_to_milliseconds(td):
384
"Convert a datetime.timedelta() to milliseconds"
385
return ((td.days * 24 * 60 * 60 * 1000)
386
+ (td.seconds * 1000)
387
+ (td.microseconds // 1000))
388
172
389
class Client(object):
173
390
"""A representation of a client host served by this server.
391
174
392
Attributes:
175
name: string; from the config file, used in log messages
393
approved: bool(); 'None' if not yet approved/disapproved
394
approval_delay: datetime.timedelta(); Time to wait for approval
395
approval_duration: datetime.timedelta(); Duration of one approval
396
checker: subprocess.Popen(); a running checker process used
397
to see if the client lives.
398
'None' if no process is running.
399
checker_callback_tag: a gobject event source tag, or None
400
checker_command: string; External command which is run to check
401
if client lives. %() expansions are done at
402
runtime with vars(self) as dict, so that for
403
instance %(name)s can be used in the command.
404
checker_initiator_tag: a gobject event source tag, or None
405
created: datetime.datetime(); (UTC) object creation
406
client_structure: Object describing what attributes a client has
407
and is used for storing the client at exit
408
current_checker_command: string; current running checker_command
409
disable_initiator_tag: a gobject event source tag, or None
410
enabled: bool()
176
411
fingerprint: string (40 or 32 hexadecimal digits); used to
177
412
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: - '' -
413
host: string; available for use by the checker command
414
interval: datetime.timedelta(); How often to start a new checker
415
last_approval_request: datetime.datetime(); (UTC) or None
416
last_checked_ok: datetime.datetime(); (UTC) or None
417
last_checker_status: integer between 0 and 255 reflecting exit
418
status of last checker. -1 reflects crashed
419
checker, -2 means no checker completed yet.
420
last_enabled: datetime.datetime(); (UTC) or None
421
name: string; from the config file, used in log messages and
422
D-Bus identifiers
423
secret: bytestring; sent verbatim (over TLS) to client
424
timeout: datetime.timedelta(); How long from last_checked_ok
425
until this client is disabled
426
extended_timeout: extra long timeout when secret has been sent
427
runtime_expansions: Allowed attributes for runtime expansion.
428
expires: datetime.datetime(); time (UTC) when a client will be
429
disabled, or None
201
430
"""
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={}):
431
432
runtime_expansions = ("approval_delay", "approval_duration",
433
"created", "enabled", "fingerprint",
434
"host", "interval", "last_checked_ok",
435
"last_enabled", "name", "timeout")
436
client_defaults = { "timeout": "5m",
437
"extended_timeout": "15m",
438
"interval": "2m",
439
"checker": "fping -q -- %%(host)s",
440
"host": "",
441
"approval_delay": "0s",
442
"approval_duration": "1s",
443
"approved_by_default": "True",
444
"enabled": "True",
445
}
446
447
def timeout_milliseconds(self):
448
"Return the 'timeout' attribute in milliseconds"
449
return timedelta_to_milliseconds(self.timeout)
450
451
def extended_timeout_milliseconds(self):
452
"Return the 'extended_timeout' attribute in milliseconds"
453
return timedelta_to_milliseconds(self.extended_timeout)
454
455
def interval_milliseconds(self):
456
"Return the 'interval' attribute in milliseconds"
457
return timedelta_to_milliseconds(self.interval)
458
459
def approval_delay_milliseconds(self):
460
return timedelta_to_milliseconds(self.approval_delay)
461
462
@staticmethod
463
def config_parser(config):
464
"""Construct a new dict of client settings of this form:
465
{ client_name: {setting_name: value, ...}, ...}
466
with exceptions for any special settings as defined above.
467
NOTE: Must be a pure function. Must return the same result
468
value given the same arguments.
469
"""
470
settings = {}
471
for client_name in config.sections():
472
section = dict(config.items(client_name))
473
client = settings[client_name] = {}
474
475
client["host"] = section["host"]
476
# Reformat values from string types to Python types
477
client["approved_by_default"] = config.getboolean(
478
client_name, "approved_by_default")
479
client["enabled"] = config.getboolean(client_name,
480
"enabled")
481
482
client["fingerprint"] = (section["fingerprint"].upper()
483
.replace(" ", ""))
484
if "secret" in section:
485
client["secret"] = section["secret"].decode("base64")
486
elif "secfile" in section:
487
with open(os.path.expanduser(os.path.expandvars
488
(section["secfile"])),
489
"rb") as secfile:
490
client["secret"] = secfile.read()
491
else:
492
raise TypeError("No secret or secfile for section %s"
493
% section)
494
client["timeout"] = string_to_delta(section["timeout"])
495
client["extended_timeout"] = string_to_delta(
496
section["extended_timeout"])
497
client["interval"] = string_to_delta(section["interval"])
498
client["approval_delay"] = string_to_delta(
499
section["approval_delay"])
500
client["approval_duration"] = string_to_delta(
501
section["approval_duration"])
502
client["checker_command"] = section["checker"]
503
client["last_approval_request"] = None
504
client["last_checked_ok"] = None
505
client["last_checker_status"] = -2
506
507
return settings
508
509
510
def __init__(self, settings, name = None):
226
511
"""Note: the 'checker' key in 'config' sets the
227
512
'checker_command' attribute and *not* the 'checker'
228
513
attribute."""
229
514
self.name = name
230
logger.debug(u"Creating client %r", self.name)
515
# adding all client settings
516
for setting, value in settings.iteritems():
517
setattr(self, setting, value)
518
519
if self.enabled:
520
if not hasattr(self, "last_enabled"):
521
self.last_enabled = datetime.datetime.utcnow()
522
if not hasattr(self, "expires"):
523
self.expires = (datetime.datetime.utcnow()
524
+ self.timeout)
525
else:
526
self.last_enabled = None
527
self.expires = None
528
529
logger.debug("Creating client %r", self.name)
231
530
# Uppercase and remove spaces from fingerprint for later
232
531
# comparison purposes with return value from the fingerprint()
233
532
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
243
else:
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
248
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
533
logger.debug(" Fingerprint: %s", self.fingerprint)
534
self.created = settings.get("created",
535
datetime.datetime.utcnow())
536
537
# attributes specific for this server instance
252
538
self.checker = None
253
539
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
540
self.disable_initiator_tag = None
255
541
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
542
self.current_checker_command = None
543
self.approved = None
544
self.approvals_pending = 0
545
self.changedstate = (multiprocessing_manager
546
.Condition(multiprocessing_manager
547
.Lock()))
548
self.client_structure = [attr for attr in
549
self.__dict__.iterkeys()
550
if not attr.startswith("_")]
551
self.client_structure.append("client_structure")
552
553
for name, t in inspect.getmembers(type(self),
554
lambda obj:
555
isinstance(obj,
556
property)):
557
if not name.startswith("_"):
558
self.client_structure.append(name)
559
560
# Send notice to process children that client state has changed
561
def send_changedstate(self):
562
with self.changedstate:
563
self.changedstate.notify_all()
564
565
def enable(self):
258
566
"""Start this client's checker and timeout hooks"""
567
if getattr(self, "enabled", False):
568
# Already enabled
569
return
570
self.send_changedstate()
571
self.expires = datetime.datetime.utcnow() + self.timeout
572
self.enabled = True
573
self.last_enabled = datetime.datetime.utcnow()
574
self.init_checker()
575
576
def disable(self, quiet=True):
577
"""Disable this client."""
578
if not getattr(self, "enabled", False):
579
return False
580
if not quiet:
581
self.send_changedstate()
582
if not quiet:
583
logger.info("Disabling client %s", self.name)
584
if getattr(self, "disable_initiator_tag", False):
585
gobject.source_remove(self.disable_initiator_tag)
586
self.disable_initiator_tag = None
587
self.expires = None
588
if getattr(self, "checker_initiator_tag", False):
589
gobject.source_remove(self.checker_initiator_tag)
590
self.checker_initiator_tag = None
591
self.stop_checker()
592
self.enabled = False
593
# Do not run this again if called by a gobject.timeout_add
594
return False
595
596
def __del__(self):
597
self.disable()
598
599
def init_checker(self):
259
600
# Schedule a new checker to be started an 'interval' from now,
260
601
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
602
self.checker_initiator_tag = (gobject.timeout_add
603
(self.interval_milliseconds(),
604
self.start_checker))
605
# Schedule a disable() when 'timeout' has passed
606
self.disable_initiator_tag = (gobject.timeout_add
607
(self.timeout_milliseconds(),
608
self.disable))
264
609
# Also start a new checker *right now*.
265
610
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):
611
612
def checker_callback(self, pid, condition, command):
295
613
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
614
self.checker_callback_tag = None
298
615
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?",
616
if os.WIFEXITED(condition):
617
self.last_checker_status = os.WEXITSTATUS(condition)
618
if self.last_checker_status == 0:
619
logger.info("Checker for %(name)s succeeded",
620
vars(self))
621
self.checked_ok()
622
else:
623
logger.info("Checker for %(name)s failed",
624
vars(self))
625
else:
626
self.last_checker_status = -1
627
logger.warning("Checker for %(name)s crashed?",
310
628
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
629
630
def checked_ok(self):
631
"""Assert that the client has been seen, alive and well."""
632
self.last_checked_ok = datetime.datetime.utcnow()
633
self.last_checker_status = 0
634
self.bump_timeout()
635
636
def bump_timeout(self, timeout=None):
637
"""Bump up the timeout for this client."""
638
if timeout is None:
639
timeout = self.timeout
640
if self.disable_initiator_tag is not None:
641
gobject.source_remove(self.disable_initiator_tag)
642
if getattr(self, "enabled", False):
643
self.disable_initiator_tag = (gobject.timeout_add
644
(timedelta_to_milliseconds
645
(timeout), self.disable))
646
self.expires = datetime.datetime.utcnow() + timeout
647
648
def need_approval(self):
649
self.last_approval_request = datetime.datetime.utcnow()
650
314
651
def start_checker(self):
315
652
"""Start a new checker subprocess if one is not running.
653
316
654
If a checker already exists, leave it running and do
317
655
nothing."""
318
656
# The reason for not killing a running checker is that if we
321
659
# client would inevitably timeout, since no checker would get
322
660
# a chance to run to completion. If we instead leave running
323
661
# 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.
662
# than 'timeout' for the client to be disabled, which is as it
663
# should be.
664
665
# If a checker exists, make sure it is not a zombie
666
try:
667
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
668
except (AttributeError, OSError) as error:
669
if (isinstance(error, OSError)
670
and error.errno != errno.ECHILD):
671
raise error
672
else:
673
if pid:
674
logger.warning("Checker was a zombie")
675
gobject.source_remove(self.checker_callback_tag)
676
self.checker_callback(pid, status,
677
self.current_checker_command)
678
# Start a new checker if needed
326
679
if self.checker is None:
327
680
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
681
# In case checker_command has exactly one % operator
682
command = self.checker_command % self.host
330
683
except TypeError:
331
684
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
333
for key, val in
334
vars(self).iteritems())
685
escaped_attrs = dict(
686
(attr,
687
re.escape(unicode(str(getattr(self, attr, "")),
688
errors=
689
'replace')))
690
for attr in
691
self.runtime_expansions)
692
335
693
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)
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s":'
697
' %s', self.checker_command, error)
340
698
return True # Try again later
699
self.current_checker_command = command
341
700
try:
342
logger.info(u"Starting checker %r for %s",
701
logger.info("Starting checker %r for %s",
343
702
command, self.name)
344
703
# We don't need to redirect stdout and stderr, since
345
704
# in normal mode, that is already done by daemon(),
348
707
self.checker = subprocess.Popen(command,
349
708
close_fds=True,
350
709
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",
710
self.checker_callback_tag = (gobject.child_watch_add
711
(self.checker.pid,
712
self.checker_callback,
713
data=command))
714
# The checker may have completed before the gobject
715
# watch was added. Check for this.
716
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
717
if pid:
718
gobject.source_remove(self.checker_callback_tag)
719
self.checker_callback(pid, status, command)
720
except OSError as error:
721
logger.error("Failed to start subprocess: %s",
356
722
error)
357
723
# Re-run this periodically if run by gobject.timeout_add
358
724
return True
725
359
726
def stop_checker(self):
360
727
"""Force the checker process, if any, to stop."""
361
728
if self.checker_callback_tag:
363
730
self.checker_callback_tag = None
364
731
if getattr(self, "checker", None) is None:
365
732
return
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
733
logger.debug("Stopping checker for %(name)s", vars(self))
367
734
try:
368
735
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
736
#time.sleep(0.5)
370
737
#if self.checker.poll() is None:
371
738
# os.kill(self.checker.pid, signal.SIGKILL)
372
except OSError, error:
739
except OSError as error:
373
740
if error.errno != errno.ESRCH: # No such process
374
741
raise
375
742
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.
743
744
745
def dbus_service_property(dbus_interface, signature="v",
746
access="readwrite", byte_arrays=False):
747
"""Decorators for marking methods of a DBusObjectWithProperties to
748
become properties on the D-Bus.
749
750
The decorated method will be called with no arguments by "Get"
751
and with one argument by "Set".
752
753
The parameters, where they are supported, are the same as
754
dbus.service.method, except there is only "signature", since the
755
type from Get() and the type sent to Set() is the same.
756
"""
757
# Encoding deeply encoded byte arrays is not supported yet by the
758
# "Set" method, so we fail early here:
759
if byte_arrays and signature != "ay":
760
raise ValueError("Byte arrays not supported for non-'ay'"
761
" signature %r" % signature)
762
def decorator(func):
763
func._dbus_is_property = True
764
func._dbus_interface = dbus_interface
765
func._dbus_signature = signature
766
func._dbus_access = access
767
func._dbus_name = func.__name__
768
if func._dbus_name.endswith("_dbus_property"):
769
func._dbus_name = func._dbus_name[:-14]
770
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
771
return func
772
return decorator
773
774
775
def dbus_interface_annotations(dbus_interface):
776
"""Decorator for marking functions returning interface annotations.
777
778
Usage:
779
780
@dbus_interface_annotations("org.example.Interface")
781
def _foo(self): # Function name does not matter
782
return {"org.freedesktop.DBus.Deprecated": "true",
783
"org.freedesktop.DBus.Property.EmitsChangedSignal":
784
"false"}
785
"""
786
def decorator(func):
787
func._dbus_is_interface = True
788
func._dbus_interface = dbus_interface
789
func._dbus_name = dbus_interface
790
return func
791
return decorator
792
793
794
def dbus_annotations(annotations):
795
"""Decorator to annotate D-Bus methods, signals or properties
796
Usage:
797
798
@dbus_service_property("org.example.Interface", signature="b",
799
access="r")
800
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property."
802
"EmitsChangedSignal": "false"})
803
def Property_dbus_property(self):
804
return dbus.Boolean(False)
805
"""
806
def decorator(func):
807
func._dbus_annotations = annotations
808
return func
809
return decorator
810
811
812
class DBusPropertyException(dbus.exceptions.DBusException):
813
"""A base class for D-Bus property-related exceptions
814
"""
815
def __unicode__(self):
816
return unicode(str(self))
817
818
819
class DBusPropertyAccessException(DBusPropertyException):
820
"""A property's access permissions disallows an operation.
821
"""
822
pass
823
824
825
class DBusPropertyNotFound(DBusPropertyException):
826
"""An attempt was made to access a non-existing property.
827
"""
828
pass
829
830
831
class DBusObjectWithProperties(dbus.service.Object):
832
"""A D-Bus object with properties.
833
834
Classes inheriting from this can use the dbus_service_property
835
decorator to expose methods as D-Bus properties. It exposes the
836
standard Get(), Set(), and GetAll() methods on the D-Bus.
837
"""
838
839
@staticmethod
840
def _is_dbus_thing(thing):
841
"""Returns a function testing if an attribute is a D-Bus thing
842
843
If called like _is_dbus_thing("method") it returns a function
844
suitable for use as predicate to inspect.getmembers().
845
"""
846
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
847
False)
848
849
def _get_all_dbus_things(self, thing):
850
"""Returns a generator of (name, attribute) pairs
851
"""
852
return ((getattr(athing.__get__(self), "_dbus_name",
853
name),
854
athing.__get__(self))
855
for cls in self.__class__.__mro__
856
for name, athing in
857
inspect.getmembers(cls,
858
self._is_dbus_thing(thing)))
859
860
def _get_dbus_property(self, interface_name, property_name):
861
"""Returns a bound method if one exists which is a D-Bus
862
property with the specified name and interface.
863
"""
864
for cls in self.__class__.__mro__:
865
for name, value in (inspect.getmembers
866
(cls,
867
self._is_dbus_thing("property"))):
868
if (value._dbus_name == property_name
869
and value._dbus_interface == interface_name):
870
return value.__get__(self)
871
872
# No such property
873
raise DBusPropertyNotFound(self.dbus_object_path + ":"
874
+ interface_name + "."
875
+ property_name)
876
877
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
878
out_signature="v")
879
def Get(self, interface_name, property_name):
880
"""Standard D-Bus property Get() method, see D-Bus standard.
881
"""
882
prop = self._get_dbus_property(interface_name, property_name)
883
if prop._dbus_access == "write":
884
raise DBusPropertyAccessException(property_name)
885
value = prop()
886
if not hasattr(value, "variant_level"):
887
return value
888
return type(value)(value, variant_level=value.variant_level+1)
889
890
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
891
def Set(self, interface_name, property_name, value):
892
"""Standard D-Bus property Set() method, see D-Bus standard.
893
"""
894
prop = self._get_dbus_property(interface_name, property_name)
895
if prop._dbus_access == "read":
896
raise DBusPropertyAccessException(property_name)
897
if prop._dbus_get_args_options["byte_arrays"]:
898
# The byte_arrays option is not supported yet on
899
# signatures other than "ay".
900
if prop._dbus_signature != "ay":
901
raise ValueError
902
value = dbus.ByteArray(b''.join(chr(byte)
903
for byte in value))
904
prop(value)
905
906
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
907
out_signature="a{sv}")
908
def GetAll(self, interface_name):
909
"""Standard D-Bus property GetAll() method, see D-Bus
910
standard.
911
912
Note: Will not include properties with access="write".
913
"""
914
properties = {}
915
for name, prop in self._get_all_dbus_things("property"):
916
if (interface_name
917
and interface_name != prop._dbus_interface):
918
# Interface non-empty but did not match
919
continue
920
# Ignore write-only properties
921
if prop._dbus_access == "write":
922
continue
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
properties[name] = value
926
continue
927
properties[name] = type(value)(value, variant_level=
928
value.variant_level+1)
929
return dbus.Dictionary(properties, signature="sv")
930
931
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
932
out_signature="s",
933
path_keyword='object_path',
934
connection_keyword='connection')
935
def Introspect(self, object_path, connection):
936
"""Overloading of standard D-Bus method.
937
938
Inserts property tags and interface annotation tags.
939
"""
940
xmlstring = dbus.service.Object.Introspect(self, object_path,
941
connection)
942
try:
943
document = xml.dom.minidom.parseString(xmlstring)
944
def make_tag(document, name, prop):
945
e = document.createElement("property")
946
e.setAttribute("name", name)
947
e.setAttribute("type", prop._dbus_signature)
948
e.setAttribute("access", prop._dbus_access)
949
return e
950
for if_tag in document.getElementsByTagName("interface"):
951
# Add property tags
952
for tag in (make_tag(document, name, prop)
953
for name, prop
954
in self._get_all_dbus_things("property")
955
if prop._dbus_interface
956
== if_tag.getAttribute("name")):
957
if_tag.appendChild(tag)
958
# Add annotation tags
959
for typ in ("method", "signal", "property"):
960
for tag in if_tag.getElementsByTagName(typ):
961
annots = dict()
962
for name, prop in (self.
963
_get_all_dbus_things(typ)):
964
if (name == tag.getAttribute("name")
965
and prop._dbus_interface
966
== if_tag.getAttribute("name")):
967
annots.update(getattr
968
(prop,
969
"_dbus_annotations",
970
{}))
971
for name, value in annots.iteritems():
972
ann_tag = document.createElement(
973
"annotation")
974
ann_tag.setAttribute("name", name)
975
ann_tag.setAttribute("value", value)
976
tag.appendChild(ann_tag)
977
# Add interface annotation tags
978
for annotation, value in dict(
979
itertools.chain(
980
*(annotations().iteritems()
981
for name, annotations in
982
self._get_all_dbus_things("interface")
983
if name == if_tag.getAttribute("name")
984
))).iteritems():
985
ann_tag = document.createElement("annotation")
986
ann_tag.setAttribute("name", annotation)
987
ann_tag.setAttribute("value", value)
988
if_tag.appendChild(ann_tag)
989
# Add the names to the return values for the
990
# "org.freedesktop.DBus.Properties" methods
991
if (if_tag.getAttribute("name")
992
== "org.freedesktop.DBus.Properties"):
993
for cn in if_tag.getElementsByTagName("method"):
994
if cn.getAttribute("name") == "Get":
995
for arg in cn.getElementsByTagName("arg"):
996
if (arg.getAttribute("direction")
997
== "out"):
998
arg.setAttribute("name", "value")
999
elif cn.getAttribute("name") == "GetAll":
1000
for arg in cn.getElementsByTagName("arg"):
1001
if (arg.getAttribute("direction")
1002
== "out"):
1003
arg.setAttribute("name", "props")
1004
xmlstring = document.toxml("utf-8")
1005
document.unlink()
1006
except (AttributeError, xml.dom.DOMException,
1007
xml.parsers.expat.ExpatError) as error:
1008
logger.error("Failed to override Introspection method",
1009
error)
1010
return xmlstring
1011
1012
1013
def datetime_to_dbus (dt, variant_level=0):
1014
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1015
if dt is None:
1016
return dbus.String("", variant_level = variant_level)
1017
return dbus.String(dt.isoformat(),
1018
variant_level=variant_level)
1019
1020
1021
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
1022
.__metaclass__):
1023
"""Applied to an empty subclass of a D-Bus object, this metaclass
1024
will add additional D-Bus attributes matching a certain pattern.
1025
"""
1026
def __new__(mcs, name, bases, attr):
1027
# Go through all the base classes which could have D-Bus
1028
# methods, signals, or properties in them
1029
old_interface_names = []
1030
for base in (b for b in bases
1031
if issubclass(b, dbus.service.Object)):
1032
# Go though all attributes of the base class
1033
for attrname, attribute in inspect.getmembers(base):
1034
# Ignore non-D-Bus attributes, and D-Bus attributes
1035
# with the wrong interface name
1036
if (not hasattr(attribute, "_dbus_interface")
1037
or not attribute._dbus_interface
1038
.startswith("se.recompile.Mandos")):
1039
continue
1040
# Create an alternate D-Bus interface name based on
1041
# the current name
1042
alt_interface = (attribute._dbus_interface
1043
.replace("se.recompile.Mandos",
1044
"se.bsnet.fukt.Mandos"))
1045
if alt_interface != attribute._dbus_interface:
1046
old_interface_names.append(alt_interface)
1047
# Is this a D-Bus signal?
1048
if getattr(attribute, "_dbus_is_signal", False):
1049
# Extract the original non-method function by
1050
# black magic
1051
nonmethod_func = (dict(
1052
zip(attribute.func_code.co_freevars,
1053
attribute.__closure__))["func"]
1054
.cell_contents)
1055
# Create a new, but exactly alike, function
1056
# object, and decorate it to be a new D-Bus signal
1057
# with the alternate D-Bus interface name
1058
new_function = (dbus.service.signal
1059
(alt_interface,
1060
attribute._dbus_signature)
1061
(types.FunctionType(
1062
nonmethod_func.func_code,
1063
nonmethod_func.func_globals,
1064
nonmethod_func.func_name,
1065
nonmethod_func.func_defaults,
1066
nonmethod_func.func_closure)))
1067
# Copy annotations, if any
1068
try:
1069
new_function._dbus_annotations = (
1070
dict(attribute._dbus_annotations))
1071
except AttributeError:
1072
pass
1073
# Define a creator of a function to call both the
1074
# old and new functions, so both the old and new
1075
# signals gets sent when the function is called
1076
def fixscope(func1, func2):
1077
"""This function is a scope container to pass
1078
func1 and func2 to the "call_both" function
1079
outside of its arguments"""
1080
def call_both(*args, **kwargs):
1081
"""This function will emit two D-Bus
1082
signals by calling func1 and func2"""
1083
func1(*args, **kwargs)
1084
func2(*args, **kwargs)
1085
return call_both
1086
# Create the "call_both" function and add it to
1087
# the class
1088
attr[attrname] = fixscope(attribute,
1089
new_function)
1090
# Is this a D-Bus method?
1091
elif getattr(attribute, "_dbus_is_method", False):
1092
# Create a new, but exactly alike, function
1093
# object. Decorate it to be a new D-Bus method
1094
# with the alternate D-Bus interface name. Add it
1095
# to the class.
1096
attr[attrname] = (dbus.service.method
1097
(alt_interface,
1098
attribute._dbus_in_signature,
1099
attribute._dbus_out_signature)
1100
(types.FunctionType
1101
(attribute.func_code,
1102
attribute.func_globals,
1103
attribute.func_name,
1104
attribute.func_defaults,
1105
attribute.func_closure)))
1106
# Copy annotations, if any
1107
try:
1108
attr[attrname]._dbus_annotations = (
1109
dict(attribute._dbus_annotations))
1110
except AttributeError:
1111
pass
1112
# Is this a D-Bus property?
1113
elif getattr(attribute, "_dbus_is_property", False):
1114
# Create a new, but exactly alike, function
1115
# object, and decorate it to be a new D-Bus
1116
# property with the alternate D-Bus interface
1117
# name. Add it to the class.
1118
attr[attrname] = (dbus_service_property
1119
(alt_interface,
1120
attribute._dbus_signature,
1121
attribute._dbus_access,
1122
attribute
1123
._dbus_get_args_options
1124
["byte_arrays"])
1125
(types.FunctionType
1126
(attribute.func_code,
1127
attribute.func_globals,
1128
attribute.func_name,
1129
attribute.func_defaults,
1130
attribute.func_closure)))
1131
# Copy annotations, if any
1132
try:
1133
attr[attrname]._dbus_annotations = (
1134
dict(attribute._dbus_annotations))
1135
except AttributeError:
1136
pass
1137
# Is this a D-Bus interface?
1138
elif getattr(attribute, "_dbus_is_interface", False):
1139
# Create a new, but exactly alike, function
1140
# object. Decorate it to be a new D-Bus interface
1141
# with the alternate D-Bus interface name. Add it
1142
# to the class.
1143
attr[attrname] = (dbus_interface_annotations
1144
(alt_interface)
1145
(types.FunctionType
1146
(attribute.func_code,
1147
attribute.func_globals,
1148
attribute.func_name,
1149
attribute.func_defaults,
1150
attribute.func_closure)))
1151
# Deprecate all old interfaces
1152
basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"
1153
for old_interface_name in old_interface_names:
1154
@dbus_interface_annotations(old_interface_name)
1155
def func(self):
1156
return { "org.freedesktop.DBus.Deprecated": "true" }
1157
# Find an unused name
1158
for aname in (basename.format(i) for i in
1159
itertools.count()):
1160
if aname not in attr:
1161
attr[aname] = func
1162
break
1163
return type.__new__(mcs, name, bases, attr)
1164
1165
1166
class ClientDBus(Client, DBusObjectWithProperties):
1167
"""A Client class using D-Bus
1168
1169
Attributes:
1170
dbus_object_path: dbus.ObjectPath
1171
bus: dbus.SystemBus()
1172
"""
1173
1174
runtime_expansions = (Client.runtime_expansions
1175
+ ("dbus_object_path",))
1176
1177
# dbus.service.Object doesn't use super(), so we can't either.
1178
1179
def __init__(self, bus = None, *args, **kwargs):
1180
self.bus = bus
1181
Client.__init__(self, *args, **kwargs)
1182
# Only now, when this client is initialized, can it show up on
1183
# the D-Bus
1184
client_object_name = unicode(self.name).translate(
1185
{ord("."): ord("_"),
1186
ord("-"): ord("_")})
1187
self.dbus_object_path = (dbus.ObjectPath
1188
("/clients/" + client_object_name))
1189
DBusObjectWithProperties.__init__(self, self.bus,
1190
self.dbus_object_path)
1191
1192
def notifychangeproperty(transform_func,
1193
dbus_name, type_func=lambda x: x,
1194
variant_level=1):
1195
""" Modify a variable so that it's a property which announces
1196
its changes to DBus.
1197
1198
transform_fun: Function that takes a value and a variant_level
1199
and transforms it to a D-Bus type.
1200
dbus_name: D-Bus name of the variable
1201
type_func: Function that transform the value before sending it
1202
to the D-Bus. Default: no transform
1203
variant_level: D-Bus variant level. Default: 1
1204
"""
1205
attrname = "_{0}".format(dbus_name)
1206
def setter(self, value):
1207
if hasattr(self, "dbus_object_path"):
1208
if (not hasattr(self, attrname) or
1209
type_func(getattr(self, attrname, None))
1210
!= type_func(value)):
1211
dbus_value = transform_func(type_func(value),
1212
variant_level
1213
=variant_level)
1214
self.PropertyChanged(dbus.String(dbus_name),
1215
dbus_value)
1216
setattr(self, attrname, value)
1217
1218
return property(lambda self: getattr(self, attrname), setter)
1219
1220
1221
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1222
approvals_pending = notifychangeproperty(dbus.Boolean,
1223
"ApprovalPending",
1224
type_func = bool)
1225
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1226
last_enabled = notifychangeproperty(datetime_to_dbus,
1227
"LastEnabled")
1228
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1229
type_func = lambda checker:
1230
checker is not None)
1231
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1232
"LastCheckedOK")
1233
last_checker_status = notifychangeproperty(dbus.Int16,
1234
"LastCheckerStatus")
1235
last_approval_request = notifychangeproperty(
1236
datetime_to_dbus, "LastApprovalRequest")
1237
approved_by_default = notifychangeproperty(dbus.Boolean,
1238
"ApprovedByDefault")
1239
approval_delay = notifychangeproperty(dbus.UInt64,
1240
"ApprovalDelay",
1241
type_func =
1242
timedelta_to_milliseconds)
1243
approval_duration = notifychangeproperty(
1244
dbus.UInt64, "ApprovalDuration",
1245
type_func = timedelta_to_milliseconds)
1246
host = notifychangeproperty(dbus.String, "Host")
1247
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1248
type_func =
1249
timedelta_to_milliseconds)
1250
extended_timeout = notifychangeproperty(
1251
dbus.UInt64, "ExtendedTimeout",
1252
type_func = timedelta_to_milliseconds)
1253
interval = notifychangeproperty(dbus.UInt64,
1254
"Interval",
1255
type_func =
1256
timedelta_to_milliseconds)
1257
checker_command = notifychangeproperty(dbus.String, "Checker")
1258
1259
del notifychangeproperty
1260
1261
def __del__(self, *args, **kwargs):
1262
try:
1263
self.remove_from_connection()
1264
except LookupError:
1265
pass
1266
if hasattr(DBusObjectWithProperties, "__del__"):
1267
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1268
Client.__del__(self, *args, **kwargs)
1269
1270
def checker_callback(self, pid, condition, command,
1271
*args, **kwargs):
1272
self.checker_callback_tag = None
1273
self.checker = None
1274
if os.WIFEXITED(condition):
1275
exitstatus = os.WEXITSTATUS(condition)
1276
# Emit D-Bus signal
1277
self.CheckerCompleted(dbus.Int16(exitstatus),
1278
dbus.Int64(condition),
1279
dbus.String(command))
1280
else:
1281
# Emit D-Bus signal
1282
self.CheckerCompleted(dbus.Int16(-1),
1283
dbus.Int64(condition),
1284
dbus.String(command))
1285
1286
return Client.checker_callback(self, pid, condition, command,
1287
*args, **kwargs)
1288
1289
def start_checker(self, *args, **kwargs):
1290
old_checker = self.checker
1291
if self.checker is not None:
1292
old_checker_pid = self.checker.pid
1293
else:
1294
old_checker_pid = None
1295
r = Client.start_checker(self, *args, **kwargs)
1296
# Only if new checker process was started
1297
if (self.checker is not None
1298
and old_checker_pid != self.checker.pid):
1299
# Emit D-Bus signal
1300
self.CheckerStarted(self.current_checker_command)
1301
return r
1302
1303
def _reset_approved(self):
1304
self.approved = None
1305
return False
1306
1307
def approve(self, value=True):
1308
self.send_changedstate()
1309
self.approved = value
1310
gobject.timeout_add(timedelta_to_milliseconds
1311
(self.approval_duration),
1312
self._reset_approved)
1313
1314
1315
## D-Bus methods, signals & properties
1316
_interface = "se.recompile.Mandos.Client"
1317
1318
## Interfaces
1319
1320
@dbus_interface_annotations(_interface)
1321
def _foo(self):
1322
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1323
"false"}
1324
1325
## Signals
1326
1327
# CheckerCompleted - signal
1328
@dbus.service.signal(_interface, signature="nxs")
1329
def CheckerCompleted(self, exitcode, waitstatus, command):
1330
"D-Bus signal"
1331
pass
1332
1333
# CheckerStarted - signal
1334
@dbus.service.signal(_interface, signature="s")
1335
def CheckerStarted(self, command):
1336
"D-Bus signal"
1337
pass
1338
1339
# PropertyChanged - signal
1340
@dbus.service.signal(_interface, signature="sv")
1341
def PropertyChanged(self, property, value):
1342
"D-Bus signal"
1343
pass
1344
1345
# GotSecret - signal
1346
@dbus.service.signal(_interface)
1347
def GotSecret(self):
1348
"""D-Bus signal
1349
Is sent after a successful transfer of secret from the Mandos
1350
server to mandos-client
1351
"""
1352
pass
1353
1354
# Rejected - signal
1355
@dbus.service.signal(_interface, signature="s")
1356
def Rejected(self, reason):
1357
"D-Bus signal"
1358
pass
1359
1360
# NeedApproval - signal
1361
@dbus.service.signal(_interface, signature="tb")
1362
def NeedApproval(self, timeout, default):
1363
"D-Bus signal"
1364
return self.need_approval()
1365
1366
## Methods
1367
1368
# Approve - method
1369
@dbus.service.method(_interface, in_signature="b")
1370
def Approve(self, value):
1371
self.approve(value)
1372
1373
# CheckedOK - method
1374
@dbus.service.method(_interface)
1375
def CheckedOK(self):
1376
self.checked_ok()
1377
1378
# Enable - method
1379
@dbus.service.method(_interface)
1380
def Enable(self):
1381
"D-Bus method"
1382
self.enable()
1383
1384
# StartChecker - method
1385
@dbus.service.method(_interface)
1386
def StartChecker(self):
1387
"D-Bus method"
1388
self.start_checker()
1389
1390
# Disable - method
1391
@dbus.service.method(_interface)
1392
def Disable(self):
1393
"D-Bus method"
1394
self.disable()
1395
1396
# StopChecker - method
1397
@dbus.service.method(_interface)
1398
def StopChecker(self):
1399
self.stop_checker()
1400
1401
## Properties
1402
1403
# ApprovalPending - property
1404
@dbus_service_property(_interface, signature="b", access="read")
1405
def ApprovalPending_dbus_property(self):
1406
return dbus.Boolean(bool(self.approvals_pending))
1407
1408
# ApprovedByDefault - property
1409
@dbus_service_property(_interface, signature="b",
1410
access="readwrite")
1411
def ApprovedByDefault_dbus_property(self, value=None):
1412
if value is None: # get
1413
return dbus.Boolean(self.approved_by_default)
1414
self.approved_by_default = bool(value)
1415
1416
# ApprovalDelay - property
1417
@dbus_service_property(_interface, signature="t",
1418
access="readwrite")
1419
def ApprovalDelay_dbus_property(self, value=None):
1420
if value is None: # get
1421
return dbus.UInt64(self.approval_delay_milliseconds())
1422
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1423
1424
# ApprovalDuration - property
1425
@dbus_service_property(_interface, signature="t",
1426
access="readwrite")
1427
def ApprovalDuration_dbus_property(self, value=None):
1428
if value is None: # get
1429
return dbus.UInt64(timedelta_to_milliseconds(
1430
self.approval_duration))
1431
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1432
1433
# Name - property
1434
@dbus_service_property(_interface, signature="s", access="read")
1435
def Name_dbus_property(self):
1436
return dbus.String(self.name)
1437
1438
# Fingerprint - property
1439
@dbus_service_property(_interface, signature="s", access="read")
1440
def Fingerprint_dbus_property(self):
1441
return dbus.String(self.fingerprint)
1442
1443
# Host - property
1444
@dbus_service_property(_interface, signature="s",
1445
access="readwrite")
1446
def Host_dbus_property(self, value=None):
1447
if value is None: # get
1448
return dbus.String(self.host)
1449
self.host = unicode(value)
1450
1451
# Created - property
1452
@dbus_service_property(_interface, signature="s", access="read")
1453
def Created_dbus_property(self):
1454
return datetime_to_dbus(self.created)
1455
1456
# LastEnabled - property
1457
@dbus_service_property(_interface, signature="s", access="read")
1458
def LastEnabled_dbus_property(self):
1459
return datetime_to_dbus(self.last_enabled)
1460
1461
# Enabled - property
1462
@dbus_service_property(_interface, signature="b",
1463
access="readwrite")
1464
def Enabled_dbus_property(self, value=None):
1465
if value is None: # get
1466
return dbus.Boolean(self.enabled)
1467
if value:
1468
self.enable()
1469
else:
1470
self.disable()
1471
1472
# LastCheckedOK - property
1473
@dbus_service_property(_interface, signature="s",
1474
access="readwrite")
1475
def LastCheckedOK_dbus_property(self, value=None):
1476
if value is not None:
1477
self.checked_ok()
1478
return
1479
return datetime_to_dbus(self.last_checked_ok)
1480
1481
# LastCheckerStatus - property
1482
@dbus_service_property(_interface, signature="n",
1483
access="read")
1484
def LastCheckerStatus_dbus_property(self):
1485
return dbus.Int16(self.last_checker_status)
1486
1487
# Expires - property
1488
@dbus_service_property(_interface, signature="s", access="read")
1489
def Expires_dbus_property(self):
1490
return datetime_to_dbus(self.expires)
1491
1492
# LastApprovalRequest - property
1493
@dbus_service_property(_interface, signature="s", access="read")
1494
def LastApprovalRequest_dbus_property(self):
1495
return datetime_to_dbus(self.last_approval_request)
1496
1497
# Timeout - property
1498
@dbus_service_property(_interface, signature="t",
1499
access="readwrite")
1500
def Timeout_dbus_property(self, value=None):
1501
if value is None: # get
1502
return dbus.UInt64(self.timeout_milliseconds())
1503
self.timeout = datetime.timedelta(0, 0, 0, value)
1504
# Reschedule timeout
1505
if self.enabled:
1506
now = datetime.datetime.utcnow()
1507
time_to_die = timedelta_to_milliseconds(
1508
(self.last_checked_ok + self.timeout) - now)
1509
if time_to_die <= 0:
1510
# The timeout has passed
1511
self.disable()
1512
else:
1513
self.expires = (now +
1514
datetime.timedelta(milliseconds =
1515
time_to_die))
1516
if (getattr(self, "disable_initiator_tag", None)
1517
is None):
1518
return
1519
gobject.source_remove(self.disable_initiator_tag)
1520
self.disable_initiator_tag = (gobject.timeout_add
1521
(time_to_die,
1522
self.disable))
1523
1524
# ExtendedTimeout - property
1525
@dbus_service_property(_interface, signature="t",
1526
access="readwrite")
1527
def ExtendedTimeout_dbus_property(self, value=None):
1528
if value is None: # get
1529
return dbus.UInt64(self.extended_timeout_milliseconds())
1530
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1531
1532
# Interval - property
1533
@dbus_service_property(_interface, signature="t",
1534
access="readwrite")
1535
def Interval_dbus_property(self, value=None):
1536
if value is None: # get
1537
return dbus.UInt64(self.interval_milliseconds())
1538
self.interval = datetime.timedelta(0, 0, 0, value)
1539
if getattr(self, "checker_initiator_tag", None) is None:
1540
return
1541
if self.enabled:
1542
# Reschedule checker run
1543
gobject.source_remove(self.checker_initiator_tag)
1544
self.checker_initiator_tag = (gobject.timeout_add
1545
(value, self.start_checker))
1546
self.start_checker() # Start one now, too
1547
1548
# Checker - property
1549
@dbus_service_property(_interface, signature="s",
1550
access="readwrite")
1551
def Checker_dbus_property(self, value=None):
1552
if value is None: # get
1553
return dbus.String(self.checker_command)
1554
self.checker_command = unicode(value)
1555
1556
# CheckerRunning - property
1557
@dbus_service_property(_interface, signature="b",
1558
access="readwrite")
1559
def CheckerRunning_dbus_property(self, value=None):
1560
if value is None: # get
1561
return dbus.Boolean(self.checker is not None)
1562
if value:
1563
self.start_checker()
1564
else:
1565
self.stop_checker()
1566
1567
# ObjectPath - property
1568
@dbus_service_property(_interface, signature="o", access="read")
1569
def ObjectPath_dbus_property(self):
1570
return self.dbus_object_path # is already a dbus.ObjectPath
1571
1572
# Secret = property
1573
@dbus_service_property(_interface, signature="ay",
1574
access="write", byte_arrays=True)
1575
def Secret_dbus_property(self, value):
1576
self.secret = str(value)
1577
1578
del _interface
1579
1580
1581
class ProxyClient(object):
1582
def __init__(self, child_pipe, fpr, address):
1583
self._pipe = child_pipe
1584
self._pipe.send(('init', fpr, address))
1585
if not self._pipe.recv():
1586
raise KeyError()
1587
1588
def __getattribute__(self, name):
1589
if name == '_pipe':
1590
return super(ProxyClient, self).__getattribute__(name)
1591
self._pipe.send(('getattr', name))
1592
data = self._pipe.recv()
1593
if data[0] == 'data':
1594
return data[1]
1595
if data[0] == 'function':
1596
def func(*args, **kwargs):
1597
self._pipe.send(('funcall', name, args, kwargs))
1598
return self._pipe.recv()[1]
1599
return func
1600
1601
def __setattr__(self, name, value):
1602
if name == '_pipe':
1603
return super(ProxyClient, self).__setattr__(name, value)
1604
self._pipe.send(('setattr', name, value))
1605
1606
1607
class ClientDBusTransitional(ClientDBus):
1608
__metaclass__ = AlternateDBusNamesMetaclass
1609
1610
1611
class ClientHandler(socketserver.BaseRequestHandler, object):
1612
"""A class to handle client connections.
1613
1614
Instantiated once for each connection to handle it.
442
1615
Note: This will run in its own forked process."""
443
1616
444
1617
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.
1618
with contextlib.closing(self.server.child_pipe) as child_pipe:
1619
logger.info("TCP connection from: %s",
1620
unicode(self.client_address))
1621
logger.debug("Pipe FD: %d",
1622
self.server.child_pipe.fileno())
1623
1624
session = (gnutls.connection
1625
.ClientSession(self.request,
1626
gnutls.connection
1627
.X509Credentials()))
1628
1629
# Note: gnutls.connection.X509Credentials is really a
1630
# generic GnuTLS certificate credentials object so long as
1631
# no X.509 keys are added to it. Therefore, we can use it
1632
# here despite using OpenPGP certificates.
1633
1634
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1635
# "+AES-256-CBC", "+SHA1",
1636
# "+COMP-NULL", "+CTYPE-OPENPGP",
1637
# "+DHE-DSS"))
1638
# Use a fallback default, since this MUST be set.
1639
priority = self.server.gnutls_priority
1640
if priority is None:
1641
priority = "NORMAL"
1642
(gnutls.library.functions
1643
.gnutls_priority_set_direct(session._c_object,
1644
priority, None))
1645
1646
# Start communication using the Mandos protocol
1647
# Get protocol number
1648
line = self.request.makefile().readline()
1649
logger.debug("Protocol version: %r", line)
1650
try:
1651
if int(line.strip().split()[0]) > 1:
1652
raise RuntimeError
1653
except (ValueError, IndexError, RuntimeError) as error:
1654
logger.error("Unknown protocol version: %s", error)
1655
return
1656
1657
# Start GnuTLS connection
1658
try:
1659
session.handshake()
1660
except gnutls.errors.GNUTLSError as error:
1661
logger.warning("Handshake failed: %s", error)
1662
# Do not run session.bye() here: the session is not
1663
# established. Just abandon the request.
1664
return
1665
logger.debug("Handshake succeeded")
1666
1667
approval_required = False
1668
try:
1669
try:
1670
fpr = self.fingerprint(self.peer_certificate
1671
(session))
1672
except (TypeError,
1673
gnutls.errors.GNUTLSError) as error:
1674
logger.warning("Bad certificate: %s", error)
1675
return
1676
logger.debug("Fingerprint: %s", fpr)
1677
1678
try:
1679
client = ProxyClient(child_pipe, fpr,
1680
self.client_address)
1681
except KeyError:
1682
return
1683
1684
if client.approval_delay:
1685
delay = client.approval_delay
1686
client.approvals_pending += 1
1687
approval_required = True
1688
1689
while True:
1690
if not client.enabled:
1691
logger.info("Client %s is disabled",
1692
client.name)
1693
if self.server.use_dbus:
1694
# Emit D-Bus signal
1695
client.Rejected("Disabled")
1696
return
1697
1698
if client.approved or not client.approval_delay:
1699
#We are approved or approval is disabled
1700
break
1701
elif client.approved is None:
1702
logger.info("Client %s needs approval",
1703
client.name)
1704
if self.server.use_dbus:
1705
# Emit D-Bus signal
1706
client.NeedApproval(
1707
client.approval_delay_milliseconds(),
1708
client.approved_by_default)
1709
else:
1710
logger.warning("Client %s was not approved",
1711
client.name)
1712
if self.server.use_dbus:
1713
# Emit D-Bus signal
1714
client.Rejected("Denied")
1715
return
1716
1717
#wait until timeout or approved
1718
time = datetime.datetime.now()
1719
client.changedstate.acquire()
1720
(client.changedstate.wait
1721
(float(client.timedelta_to_milliseconds(delay)
1722
/ 1000)))
1723
client.changedstate.release()
1724
time2 = datetime.datetime.now()
1725
if (time2 - time) >= delay:
1726
if not client.approved_by_default:
1727
logger.warning("Client %s timed out while"
1728
" waiting for approval",
1729
client.name)
1730
if self.server.use_dbus:
1731
# Emit D-Bus signal
1732
client.Rejected("Approval timed out")
1733
return
1734
else:
1735
break
1736
else:
1737
delay -= time2 - time
1738
1739
sent_size = 0
1740
while sent_size < len(client.secret):
1741
try:
1742
sent = session.send(client.secret[sent_size:])
1743
except gnutls.errors.GNUTLSError as error:
1744
logger.warning("gnutls send failed")
1745
return
1746
logger.debug("Sent: %d, remaining: %d",
1747
sent, len(client.secret)
1748
- (sent_size + sent))
1749
sent_size += sent
1750
1751
logger.info("Sending secret to %s", client.name)
1752
# bump the timeout using extended_timeout
1753
client.bump_timeout(client.extended_timeout)
1754
if self.server.use_dbus:
1755
# Emit D-Bus signal
1756
client.GotSecret()
1757
1758
finally:
1759
if approval_required:
1760
client.approvals_pending -= 1
1761
try:
1762
session.bye()
1763
except gnutls.errors.GNUTLSError as error:
1764
logger.warning("GnuTLS bye failed")
1765
1766
@staticmethod
1767
def peer_certificate(session):
1768
"Return the peer's OpenPGP certificate as a bytestring"
1769
# If not an OpenPGP certificate...
1770
if (gnutls.library.functions
1771
.gnutls_certificate_type_get(session._c_object)
1772
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1773
# ...do the normal thing
1774
return session.peer_certificate
1775
list_size = ctypes.c_uint(1)
1776
cert_list = (gnutls.library.functions
1777
.gnutls_certificate_get_peers
1778
(session._c_object, ctypes.byref(list_size)))
1779
if not bool(cert_list) and list_size.value != 0:
1780
raise gnutls.errors.GNUTLSError("error getting peer"
1781
" certificate")
1782
if list_size.value == 0:
1783
return None
1784
cert = cert_list[0]
1785
return ctypes.string_at(cert.data, cert.size)
1786
1787
@staticmethod
1788
def fingerprint(openpgp):
1789
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1790
# New GnuTLS "datum" with the OpenPGP public key
1791
datum = (gnutls.library.types
1792
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1793
ctypes.POINTER
1794
(ctypes.c_ubyte)),
1795
ctypes.c_uint(len(openpgp))))
1796
# New empty GnuTLS certificate
1797
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1798
(gnutls.library.functions
1799
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1800
# Import the OpenPGP public key into the certificate
1801
(gnutls.library.functions
1802
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1803
gnutls.library.constants
1804
.GNUTLS_OPENPGP_FMT_RAW))
1805
# Verify the self signature in the key
1806
crtverify = ctypes.c_uint()
1807
(gnutls.library.functions
1808
.gnutls_openpgp_crt_verify_self(crt, 0,
1809
ctypes.byref(crtverify)))
1810
if crtverify.value != 0:
1811
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1812
raise (gnutls.errors.CertificateSecurityError
1813
("Verify failed"))
1814
# New buffer for the fingerprint
1815
buf = ctypes.create_string_buffer(20)
1816
buf_len = ctypes.c_size_t()
1817
# Get the fingerprint from the certificate into the buffer
1818
(gnutls.library.functions
1819
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1820
ctypes.byref(buf_len)))
1821
# Deinit the certificate
1822
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1823
# Convert the buffer to a Python bytestring
1824
fpr = ctypes.string_at(buf, buf_len.value)
1825
# Convert the bytestring to hexadecimal notation
1826
hex_fpr = binascii.hexlify(fpr).upper()
1827
return hex_fpr
1828
1829
1830
class MultiprocessingMixIn(object):
1831
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1832
def sub_process_main(self, request, address):
1833
try:
1834
self.finish_request(request, address)
1835
except Exception:
1836
self.handle_error(request, address)
1837
self.close_request(request)
1838
1839
def process_request(self, request, address):
1840
"""Start a new process to process the request."""
1841
proc = multiprocessing.Process(target = self.sub_process_main,
1842
args = (request,
1843
address))
1844
proc.start()
1845
return proc
1846
1847
1848
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1849
""" adds a pipe to the MixIn """
1850
def process_request(self, request, client_address):
1851
"""Overrides and wraps the original process_request().
1852
1853
This function creates a new pipe in self.pipe
1854
"""
1855
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1856
1857
proc = MultiprocessingMixIn.process_request(self, request,
1858
client_address)
1859
self.child_pipe.close()
1860
self.add_pipe(parent_pipe, proc)
1861
1862
def add_pipe(self, parent_pipe, proc):
1863
"""Dummy function; override as necessary"""
1864
raise NotImplementedError
1865
1866
1867
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1868
socketserver.TCPServer, object):
1869
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1870
518
1871
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1872
enabled: Boolean; whether this server is activated yet
1873
interface: None or a network interface name (string)
1874
use_ipv6: Boolean; to use IPv6 or not
522
1875
"""
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)
1876
def __init__(self, server_address, RequestHandlerClass,
1877
interface=None, use_ipv6=True):
1878
self.interface = interface
1879
if use_ipv6:
1880
self.address_family = socket.AF_INET6
1881
socketserver.TCPServer.__init__(self, server_address,
1882
RequestHandlerClass)
533
1883
def server_bind(self):
534
1884
"""This overrides the normal server_bind() function
535
1885
to bind to an interface if one was specified, and also NOT to
536
1886
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
1887
if self.interface is not None:
1888
if SO_BINDTODEVICE is None:
1889
logger.error("SO_BINDTODEVICE does not exist;"
1890
" cannot bind to interface %s",
1891
self.interface)
1892
else:
1893
try:
1894
self.socket.setsockopt(socket.SOL_SOCKET,
1895
SO_BINDTODEVICE,
1896
str(self.interface
1897
+ '\0'))
1898
except socket.error as error:
1899
if error[0] == errno.EPERM:
1900
logger.error("No permission to"
1901
" bind to interface %s",
1902
self.interface)
1903
elif error[0] == errno.ENOPROTOOPT:
1904
logger.error("SO_BINDTODEVICE not available;"
1905
" cannot bind to interface %s",
1906
self.interface)
1907
else:
1908
raise
551
1909
# Only bind(2) the socket if we really need to.
552
1910
if self.server_address[0] or self.server_address[1]:
553
1911
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1912
if self.address_family == socket.AF_INET6:
1913
any_address = "::" # in6addr_any
1914
else:
1915
any_address = socket.INADDR_ANY
1916
self.server_address = (any_address,
556
1917
self.server_address[1])
557
1918
elif not self.server_address[1]:
558
1919
self.server_address = (self.server_address[0],
559
1920
0)
560
# if self.settings["interface"]:
1921
# if self.interface:
561
1922
# self.server_address = (self.server_address[0],
562
1923
# 0, # port
563
1924
# 0, # flowinfo
564
1925
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1926
# (self.interface))
1927
return socketserver.TCPServer.server_bind(self)
1928
1929
1930
class MandosServer(IPv6_TCPServer):
1931
"""Mandos server.
1932
1933
Attributes:
1934
clients: set of Client objects
1935
gnutls_priority GnuTLS priority string
1936
use_dbus: Boolean; to emit D-Bus signals or not
1937
1938
Assumes a gobject.MainLoop event loop.
1939
"""
1940
def __init__(self, server_address, RequestHandlerClass,
1941
interface=None, use_ipv6=True, clients=None,
1942
gnutls_priority=None, use_dbus=True):
1943
self.enabled = False
1944
self.clients = clients
1945
if self.clients is None:
1946
self.clients = {}
1947
self.use_dbus = use_dbus
1948
self.gnutls_priority = gnutls_priority
1949
IPv6_TCPServer.__init__(self, server_address,
1950
RequestHandlerClass,
1951
interface = interface,
1952
use_ipv6 = use_ipv6)
568
1953
def server_activate(self):
569
1954
if self.enabled:
570
return super(type(self), self).server_activate()
1955
return socketserver.TCPServer.server_activate(self)
1956
571
1957
def enable(self):
572
1958
self.enabled = True
1959
1960
def add_pipe(self, parent_pipe, proc):
1961
# Call "handle_ipc" for both data and EOF events
1962
gobject.io_add_watch(parent_pipe.fileno(),
1963
gobject.IO_IN | gobject.IO_HUP,
1964
functools.partial(self.handle_ipc,
1965
parent_pipe =
1966
parent_pipe,
1967
proc = proc))
1968
1969
def handle_ipc(self, source, condition, parent_pipe=None,
1970
proc = None, client_object=None):
1971
condition_names = {
1972
gobject.IO_IN: "IN", # There is data to read.
1973
gobject.IO_OUT: "OUT", # Data can be written (without
1974
# blocking).
1975
gobject.IO_PRI: "PRI", # There is urgent data to read.
1976
gobject.IO_ERR: "ERR", # Error condition.
1977
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1978
# broken, usually for pipes and
1979
# sockets).
1980
}
1981
conditions_string = ' | '.join(name
1982
for cond, name in
1983
condition_names.iteritems()
1984
if cond & condition)
1985
# error, or the other end of multiprocessing.Pipe has closed
1986
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1987
# Wait for other process to exit
1988
proc.join()
1989
return False
1990
1991
# Read a request from the child
1992
request = parent_pipe.recv()
1993
command = request[0]
1994
1995
if command == 'init':
1996
fpr = request[1]
1997
address = request[2]
1998
1999
for c in self.clients.itervalues():
2000
if c.fingerprint == fpr:
2001
client = c
2002
break
2003
else:
2004
logger.info("Client not found for fingerprint: %s, ad"
2005
"dress: %s", fpr, address)
2006
if self.use_dbus:
2007
# Emit D-Bus signal
2008
mandos_dbus_service.ClientNotFound(fpr,
2009
address[0])
2010
parent_pipe.send(False)
2011
return False
2012
2013
gobject.io_add_watch(parent_pipe.fileno(),
2014
gobject.IO_IN | gobject.IO_HUP,
2015
functools.partial(self.handle_ipc,
2016
parent_pipe =
2017
parent_pipe,
2018
proc = proc,
2019
client_object =
2020
client))
2021
parent_pipe.send(True)
2022
# remove the old hook in favor of the new above hook on
2023
# same fileno
2024
return False
2025
if command == 'funcall':
2026
funcname = request[1]
2027
args = request[2]
2028
kwargs = request[3]
2029
2030
parent_pipe.send(('data', getattr(client_object,
2031
funcname)(*args,
2032
**kwargs)))
2033
2034
if command == 'getattr':
2035
attrname = request[1]
2036
if callable(client_object.__getattribute__(attrname)):
2037
parent_pipe.send(('function',))
2038
else:
2039
parent_pipe.send(('data', client_object
2040
.__getattribute__(attrname)))
2041
2042
if command == 'setattr':
2043
attrname = request[1]
2044
value = request[2]
2045
setattr(client_object, attrname, value)
2046
2047
return True
573
2048
574
2049
575
2050
def string_to_delta(interval):
576
2051
"""Parse a string and return a datetime.timedelta
577
2052
578
2053
>>> string_to_delta('7d')
579
2054
datetime.timedelta(7)
580
2055
>>> string_to_delta('60s')
583
2058
datetime.timedelta(0, 3600)
584
2059
>>> string_to_delta('24h')
585
2060
datetime.timedelta(1)
586
>>> string_to_delta(u'1w')
2061
>>> string_to_delta('1w')
587
2062
datetime.timedelta(7)
588
2063
>>> string_to_delta('5m 30s')
589
2064
datetime.timedelta(0, 330)
591
2066
timevalue = datetime.timedelta(0)
592
2067
for s in interval.split():
593
2068
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
2069
suffix = unicode(s[-1])
2070
value = int(s[:-1])
2071
if suffix == "d":
597
2072
delta = datetime.timedelta(value)
598
elif suffix == u"s":
2073
elif suffix == "s":
599
2074
delta = datetime.timedelta(0, value)
600
elif suffix == u"m":
2075
elif suffix == "m":
601
2076
delta = datetime.timedelta(0, 0, 0, 0, value)
602
elif suffix == u"h":
2077
elif suffix == "h":
603
2078
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
604
elif suffix == u"w":
2079
elif suffix == "w":
605
2080
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
2081
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
2082
raise ValueError("Unknown suffix %r" % suffix)
2083
except (ValueError, IndexError) as e:
2084
raise ValueError(*(e.args))
610
2085
timevalue += delta
611
2086
return timevalue
612
2087
613
2088
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
2089
def daemon(nochdir = False, noclose = False):
663
2090
"""See daemon(3). Standard BSD Unix function.
2091
664
2092
This should really exist as os.daemon, but it doesn't (yet)."""
665
2093
if os.fork():
666
2094
sys.exit()
671
2099
sys.exit()
672
2100
if not noclose:
673
2101
# Close all standard open file descriptors
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2102
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
675
2103
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
2104
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
2105
"%s not a character device"
2106
% os.devnull)
678
2107
os.dup2(null, sys.stdin.fileno())
679
2108
os.dup2(null, sys.stdout.fileno())
680
2109
os.dup2(null, sys.stderr.fileno())
683
2112
684
2113
685
2114
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()
2115
2116
##################################################################
2117
# Parsing of options, both command line and config file
2118
2119
parser = argparse.ArgumentParser()
2120
parser.add_argument("-v", "--version", action="version",
2121
version = "%%(prog)s %s" % version,
2122
help="show version number and exit")
2123
parser.add_argument("-i", "--interface", metavar="IF",
2124
help="Bind to interface IF")
2125
parser.add_argument("-a", "--address",
2126
help="Address to listen for requests on")
2127
parser.add_argument("-p", "--port", type=int,
2128
help="Port number to receive requests on")
2129
parser.add_argument("--check", action="store_true",
2130
help="Run self-test")
2131
parser.add_argument("--debug", action="store_true",
2132
help="Debug mode; run in foreground and log"
2133
" to terminal")
2134
parser.add_argument("--debuglevel", metavar="LEVEL",
2135
help="Debug level for stdout output")
2136
parser.add_argument("--priority", help="GnuTLS"
2137
" priority string (see GnuTLS documentation)")
2138
parser.add_argument("--servicename",
2139
metavar="NAME", help="Zeroconf service name")
2140
parser.add_argument("--configdir",
2141
default="/etc/mandos", metavar="DIR",
2142
help="Directory to search for configuration"
2143
" files")
2144
parser.add_argument("--no-dbus", action="store_false",
2145
dest="use_dbus", help="Do not provide D-Bus"
2146
" system bus interface")
2147
parser.add_argument("--no-ipv6", action="store_false",
2148
dest="use_ipv6", help="Do not use IPv6")
2149
parser.add_argument("--no-restore", action="store_false",
2150
dest="restore", help="Do not restore stored"
2151
" state")
2152
parser.add_argument("--statedir", metavar="DIR",
2153
help="Directory to save/restore state in")
2154
2155
options = parser.parse_args()
710
2156
711
2157
if options.check:
712
2158
import doctest
721
2167
"priority":
722
2168
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
2169
"servicename": "Mandos",
2170
"use_dbus": "True",
2171
"use_ipv6": "True",
2172
"debuglevel": "",
2173
"restore": "True",
2174
"statedir": "/var/lib/mandos"
724
2175
}
725
2176
726
2177
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
2178
server_config = configparser.SafeConfigParser(server_defaults)
728
2179
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2180
server_config.read(os.path.join(options.configdir,
2181
"mandos.conf"))
730
2182
# Convert the SafeConfigParser object to a dict
731
2183
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
2184
# Use the appropriate methods on the non-string config options
2185
for option in ("debug", "use_dbus", "use_ipv6"):
2186
server_settings[option] = server_config.getboolean("DEFAULT",
2187
option)
2188
if server_settings["port"]:
2189
server_settings["port"] = server_config.getint("DEFAULT",
2190
"port")
735
2191
del server_config
736
2192
737
2193
# Override the settings from the config file with command line
738
2194
# options, if set.
739
2195
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
2196
"priority", "servicename", "configdir",
2197
"use_dbus", "use_ipv6", "debuglevel", "restore",
2198
"statedir"):
741
2199
value = getattr(options, option)
742
2200
if value is not None:
743
2201
server_settings[option] = value
744
2202
del options
2203
# Force all strings to be unicode
2204
for option in server_settings.keys():
2205
if type(server_settings[option]) is str:
2206
server_settings[option] = unicode(server_settings[option])
745
2207
# Now we have our good server settings in "server_settings"
746
2208
2209
##################################################################
2210
2211
# For convenience
747
2212
debug = server_settings["debug"]
2213
debuglevel = server_settings["debuglevel"]
2214
use_dbus = server_settings["use_dbus"]
2215
use_ipv6 = server_settings["use_ipv6"]
2216
stored_state_path = os.path.join(server_settings["statedir"],
2217
stored_state_file)
748
2218
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
2219
if debug:
2220
initlogger(debug, logging.DEBUG)
2221
else:
2222
if not debuglevel:
2223
initlogger(debug)
2224
else:
2225
level = getattr(logging, debuglevel.upper())
2226
initlogger(debug, level)
752
2227
753
2228
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
2229
syslogger.setFormatter(logging.Formatter
2230
('Mandos (%s) [%%(process)d]:'
2231
' %%(levelname)s: %%(message)s'
757
2232
% server_settings["servicename"]))
758
2233
759
2234
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
764
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
2235
client_config = configparser.SafeConfigParser(Client
2236
.client_defaults)
766
2237
client_config.read(os.path.join(server_settings["configdir"],
767
2238
"clients.conf"))
768
2239
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:
2240
global mandos_dbus_service
2241
mandos_dbus_service = None
2242
2243
tcp_server = MandosServer((server_settings["address"],
2244
server_settings["port"]),
2245
ClientHandler,
2246
interface=(server_settings["interface"]
2247
or None),
2248
use_ipv6=use_ipv6,
2249
gnutls_priority=
2250
server_settings["priority"],
2251
use_dbus=use_dbus)
2252
if not debug:
2253
pidfilename = "/var/run/mandos.pid"
2254
try:
2255
pidfile = open(pidfilename, "w")
2256
except IOError:
2257
logger.error("Could not open file %r", pidfilename)
2258
2259
try:
2260
uid = pwd.getpwnam("_mandos").pw_uid
2261
gid = pwd.getpwnam("_mandos").pw_gid
2262
except KeyError:
2263
try:
2264
uid = pwd.getpwnam("mandos").pw_uid
2265
gid = pwd.getpwnam("mandos").pw_gid
2266
except KeyError:
2267
try:
2268
uid = pwd.getpwnam("nobody").pw_uid
2269
gid = pwd.getpwnam("nobody").pw_gid
2270
except KeyError:
2271
uid = 65534
2272
gid = 65534
2273
try:
2274
os.setgid(gid)
798
2275
os.setuid(uid)
799
os.setgid(gid)
800
except OSError, error:
2276
except OSError as error:
801
2277
if error[0] != errno.EPERM:
802
2278
raise error
803
2279
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"])
2280
if debug:
2281
# Enable all possible GnuTLS debugging
2282
2283
# "Use a log level over 10 to enable all debugging options."
2284
# - GnuTLS manual
2285
gnutls.library.functions.gnutls_global_set_log_level(11)
2286
2287
@gnutls.library.types.gnutls_log_func
2288
def debug_gnutls(level, string):
2289
logger.debug("GnuTLS: %s", string[:-1])
2290
2291
(gnutls.library.functions
2292
.gnutls_global_set_log_function(debug_gnutls))
2293
2294
# Redirect stdin so all checkers get /dev/null
2295
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2296
os.dup2(null, sys.stdin.fileno())
2297
if null > 2:
2298
os.close(null)
2299
2300
# Need to fork before connecting to D-Bus
2301
if not debug:
2302
# Close all input and output, do double fork, etc.
2303
daemon()
2304
2305
gobject.threads_init()
810
2306
811
2307
global main_loop
812
global bus
813
global server
814
2308
# From the Avahi example code
815
DBusGMainLoop(set_as_default=True )
2309
DBusGMainLoop(set_as_default=True)
816
2310
main_loop = gobject.MainLoop()
817
2311
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
2312
# 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
2313
if use_dbus:
2314
try:
2315
bus_name = dbus.service.BusName("se.recompile.Mandos",
2316
bus, do_not_queue=True)
2317
old_bus_name = (dbus.service.BusName
2318
("se.bsnet.fukt.Mandos", bus,
2319
do_not_queue=True))
2320
except dbus.exceptions.NameExistsException as e:
2321
logger.error(unicode(e) + ", disabling D-Bus")
2322
use_dbus = False
2323
server_settings["use_dbus"] = False
2324
tcp_server.use_dbus = False
2325
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2326
service = AvahiServiceToSyslog(name =
2327
server_settings["servicename"],
2328
servicetype = "_mandos._tcp",
2329
protocol = protocol, bus = bus)
2330
if server_settings["interface"]:
2331
service.interface = (if_nametoindex
2332
(str(server_settings["interface"])))
2333
2334
global multiprocessing_manager
2335
multiprocessing_manager = multiprocessing.Manager()
2336
2337
client_class = Client
2338
if use_dbus:
2339
client_class = functools.partial(ClientDBusTransitional,
2340
bus = bus)
2341
2342
client_settings = Client.config_parser(client_config)
2343
old_client_settings = {}
2344
clients_data = {}
2345
2346
# Get client data and settings from last running state.
2347
if server_settings["restore"]:
2348
try:
2349
with open(stored_state_path, "rb") as stored_state:
2350
clients_data, old_client_settings = (pickle.load
2351
(stored_state))
2352
os.remove(stored_state_path)
2353
except IOError as e:
2354
logger.warning("Could not load persistent state: {0}"
2355
.format(e))
2356
if e.errno != errno.ENOENT:
2357
raise
2358
except EOFError as e:
2359
logger.warning("Could not load persistent state: "
2360
"EOFError: {0}".format(e))
2361
2362
with PGPEngine() as pgp:
2363
for client_name, client in clients_data.iteritems():
2364
# Decide which value to use after restoring saved state.
2365
# We have three different values: Old config file,
2366
# new config file, and saved state.
2367
# New config value takes precedence if it differs from old
2368
# config value, otherwise use saved state.
2369
for name, value in client_settings[client_name].items():
2370
try:
2371
# For each value in new config, check if it
2372
# differs from the old config value (Except for
2373
# the "secret" attribute)
2374
if (name != "secret" and
2375
value != old_client_settings[client_name]
2376
[name]):
2377
client[name] = value
2378
except KeyError:
2379
pass
2380
2381
# Clients who has passed its expire date can still be
2382
# enabled if its last checker was successful. Clients
2383
# whose checker succeeded before we stored its state is
2384
# assumed to have successfully run all checkers during
2385
# downtime.
2386
if client["enabled"]:
2387
if datetime.datetime.utcnow() >= client["expires"]:
2388
if not client["last_checked_ok"]:
2389
logger.warning(
2390
"disabling client {0} - Client never "
2391
"performed a successful checker"
2392
.format(client_name))
2393
client["enabled"] = False
2394
elif client["last_checker_status"] != 0:
2395
logger.warning(
2396
"disabling client {0} - Client "
2397
"last checker failed with error code {1}"
2398
.format(client_name,
2399
client["last_checker_status"]))
2400
client["enabled"] = False
2401
else:
2402
client["expires"] = (datetime.datetime
2403
.utcnow()
2404
+ client["timeout"])
2405
logger.debug("Last checker succeeded,"
2406
" keeping {0} enabled"
2407
.format(client_name))
2408
try:
2409
client["secret"] = (
2410
pgp.decrypt(client["encrypted_secret"],
2411
client_settings[client_name]
2412
["secret"]))
2413
except PGPError:
2414
# If decryption fails, we use secret from new settings
2415
logger.debug("Failed to decrypt {0} old secret"
2416
.format(client_name))
2417
client["secret"] = (
2418
client_settings[client_name]["secret"])
2419
2420
2421
# Add/remove clients based on new changes made to config
2422
for client_name in (set(old_client_settings)
2423
- set(client_settings)):
2424
del clients_data[client_name]
2425
for client_name in (set(client_settings)
2426
- set(old_client_settings)):
2427
clients_data[client_name] = client_settings[client_name]
2428
2429
# Create all client objects
2430
for client_name, client in clients_data.iteritems():
2431
tcp_server.clients[client_name] = client_class(
2432
name = client_name, settings = client)
2433
2434
if not tcp_server.clients:
2435
logger.warning("No clients defined")
2436
2437
if not debug:
2438
try:
2439
with pidfile:
2440
pid = os.getpid()
2441
pidfile.write(str(pid) + "\n".encode("utf-8"))
2442
del pidfile
2443
except IOError:
2444
logger.error("Could not write to file %r with PID %d",
2445
pidfilename, pid)
2446
except NameError:
2447
# "pidfile" was never created
2448
pass
2449
del pidfilename
2450
signal.signal(signal.SIGINT, signal.SIG_IGN)
2451
2452
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2453
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2454
2455
if use_dbus:
2456
class MandosDBusService(DBusObjectWithProperties):
2457
"""A D-Bus proxy object"""
2458
def __init__(self):
2459
dbus.service.Object.__init__(self, bus, "/")
2460
_interface = "se.recompile.Mandos"
2461
2462
@dbus_interface_annotations(_interface)
2463
def _foo(self):
2464
return { "org.freedesktop.DBus.Property"
2465
".EmitsChangedSignal":
2466
"false"}
2467
2468
@dbus.service.signal(_interface, signature="o")
2469
def ClientAdded(self, objpath):
2470
"D-Bus signal"
2471
pass
2472
2473
@dbus.service.signal(_interface, signature="ss")
2474
def ClientNotFound(self, fingerprint, address):
2475
"D-Bus signal"
2476
pass
2477
2478
@dbus.service.signal(_interface, signature="os")
2479
def ClientRemoved(self, objpath, name):
2480
"D-Bus signal"
2481
pass
2482
2483
@dbus.service.method(_interface, out_signature="ao")
2484
def GetAllClients(self):
2485
"D-Bus method"
2486
return dbus.Array(c.dbus_object_path
2487
for c in
2488
tcp_server.clients.itervalues())
2489
2490
@dbus.service.method(_interface,
2491
out_signature="a{oa{sv}}")
2492
def GetAllClientsWithProperties(self):
2493
"D-Bus method"
2494
return dbus.Dictionary(
2495
((c.dbus_object_path, c.GetAll(""))
2496
for c in tcp_server.clients.itervalues()),
2497
signature="oa{sv}")
2498
2499
@dbus.service.method(_interface, in_signature="o")
2500
def RemoveClient(self, object_path):
2501
"D-Bus method"
2502
for c in tcp_server.clients.itervalues():
2503
if c.dbus_object_path == object_path:
2504
del tcp_server.clients[c.name]
2505
c.remove_from_connection()
2506
# Don't signal anything except ClientRemoved
2507
c.disable(quiet=True)
2508
# Emit D-Bus signal
2509
self.ClientRemoved(object_path, c.name)
2510
return
2511
raise KeyError(object_path)
2512
2513
del _interface
2514
2515
class MandosDBusServiceTransitional(MandosDBusService):
2516
__metaclass__ = AlternateDBusNamesMetaclass
2517
mandos_dbus_service = MandosDBusServiceTransitional()
862
2518
863
2519
def cleanup():
864
2520
"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()
2521
service.cleanup()
2522
2523
multiprocessing.active_children()
2524
if not (tcp_server.clients or client_settings):
2525
return
2526
2527
# Store client before exiting. Secrets are encrypted with key
2528
# based on what config file has. If config file is
2529
# removed/edited, old secret will thus be unrecovable.
2530
clients = {}
2531
with PGPEngine() as pgp:
2532
for client in tcp_server.clients.itervalues():
2533
key = client_settings[client.name]["secret"]
2534
client.encrypted_secret = pgp.encrypt(client.secret,
2535
key)
2536
client_dict = {}
2537
2538
# A list of attributes that can not be pickled
2539
# + secret.
2540
exclude = set(("bus", "changedstate", "secret",
2541
"checker"))
2542
for name, typ in (inspect.getmembers
2543
(dbus.service.Object)):
2544
exclude.add(name)
2545
2546
client_dict["encrypted_secret"] = (client
2547
.encrypted_secret)
2548
for attr in client.client_structure:
2549
if attr not in exclude:
2550
client_dict[attr] = getattr(client, attr)
2551
2552
clients[client.name] = client_dict
2553
del client_settings[client.name]["secret"]
2554
2555
try:
2556
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2557
prefix="clients-",
2558
dir=os.path.dirname
2559
(stored_state_path))
2560
with os.fdopen(tempfd, "wb") as stored_state:
2561
pickle.dump((clients, client_settings), stored_state)
2562
os.rename(tempname, stored_state_path)
2563
except (IOError, OSError) as e:
2564
logger.warning("Could not save persistent state: {0}"
2565
.format(e))
2566
if not debug:
2567
try:
2568
os.remove(tempname)
2569
except NameError:
2570
pass
2571
if e.errno not in set((errno.ENOENT, errno.EACCES,
2572
errno.EEXIST)):
2573
raise e
2574
2575
# Delete all clients, and settings from config
2576
while tcp_server.clients:
2577
name, client = tcp_server.clients.popitem()
2578
if use_dbus:
2579
client.remove_from_connection()
2580
# Don't signal anything except ClientRemoved
2581
client.disable(quiet=True)
2582
if use_dbus:
2583
# Emit D-Bus signal
2584
mandos_dbus_service.ClientRemoved(client
2585
.dbus_object_path,
2586
client.name)
2587
client_settings.clear()
876
2588
877
2589
atexit.register(cleanup)
878
2590
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()
2591
for client in tcp_server.clients.itervalues():
2592
if use_dbus:
2593
# Emit D-Bus signal
2594
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2595
# Need to initiate checking of clients
2596
if client.enabled:
2597
client.init_checker()
886
2598
887
2599
tcp_server.enable()
888
2600
tcp_server.server_activate()
889
2601
890
2602
# Find out what port we got
891
2603
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())
2604
if use_ipv6:
2605
logger.info("Now listening on address %r, port %d,"
2606
" flowinfo %d, scope_id %d"
2607
% tcp_server.socket.getsockname())
2608
else: # IPv4
2609
logger.info("Now listening on address %r, port %d"
2610
% tcp_server.socket.getsockname())
894
2611
895
2612
#service.interface = tcp_server.socket.getsockname()[3]
896
2613
897
2614
try:
898
2615
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
2616
try:
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
2617
service.activate()
2618
except dbus.exceptions.DBusException as error:
2619
logger.critical("DBusException: %s", error)
2620
cleanup()
904
2621
sys.exit(1)
905
2622
# End of Avahi example code
906
2623
907
2624
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
2625
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2626
(tcp_server.handle_request
2627
(*args[2:], **kwargs) or True))
911
2628
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
2629
logger.debug("Starting main loop")
914
2630
main_loop.run()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2631
except AvahiError as error:
2632
logger.critical("AvahiError: %s", error)
2633
cleanup()
917
2634
sys.exit(1)
918
2635
except KeyboardInterrupt:
919
2636
if debug:
920
print
2637
print("", file=sys.stderr)
2638
logger.debug("Server received KeyboardInterrupt")
2639
logger.debug("Server exiting")
2640
# Must run before the D-Bus bus name gets deregistered
2641
cleanup()
921
2642
922
2643
if __name__ == '__main__':
923
2644
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0