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- Committer: Teddy Hogeborn
- Date: 2009-02-07 03:38:17 UTC
- mto: (24.1.133 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 250.
- Revision ID: teddy@fukt.bsnet.se-20090207033817-aotdjeibhz3sa4lr
* plugin-runner.c (main): If debugging, print name of failed plugins.
- files removed:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
from __future__ import division, with_statement, absolute_import
36
35
37
import SocketServer as socketserver
36
import SocketServer
38
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import socket
39
import argparse
38
import optparse
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
import ConfigParser as configparser
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
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
59
from contextlib import closing
68
60
69
61
import dbus
70
62
import dbus.service
73
65
from dbus.mainloop.glib import DBusGMainLoop
74
66
import ctypes
75
67
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
79
80
try:
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
except AttributeError:
83
try:
84
from IN import SO_BINDTODEVICE
85
except ImportError:
86
SO_BINDTODEVICE = None
87
88
89
version = "1.4.1"
90
stored_state_path = "/var/lib/mandos/clients.pickle"
91
92
logger = logging.getLogger()
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
93
72
syslogger = (logging.handlers.SysLogHandler
94
73
(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
114
def initlogger(level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
119
' %(message)s'))
120
logger.addHandler(syslogger)
121
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console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class CryptoError(Exception):
132
pass
133
134
135
class Crypto(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise CryptoError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise CryptoError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
209
84
210
85
class AvahiError(Exception):
211
86
def __init__(self, value, *args, **kwargs):
223
98
224
99
class AvahiService(object):
225
100
"""An Avahi (Zeroconf) service.
226
227
101
Attributes:
228
102
interface: integer; avahi.IF_UNSPEC or an interface index.
229
103
Used to optionally bind to the specified interface.
237
111
max_renames: integer; maximum number of renames
238
112
rename_count: integer; counter so we only rename after collisions
239
113
a sensible number of times
240
group: D-Bus Entry Group
241
server: D-Bus Server
242
bus: dbus.SystemBus()
243
114
"""
244
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
245
116
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
247
protocol = avahi.PROTO_UNSPEC, bus = None):
117
domain = "", host = "", max_renames = 32768):
248
118
self.interface = interface
249
119
self.name = name
250
120
self.type = servicetype
254
124
self.host = host
255
125
self.rename_count = 0
256
126
self.max_renames = max_renames
257
self.protocol = protocol
258
self.group = None # our entry group
259
self.server = None
260
self.bus = bus
261
self.entry_group_state_changed_match = None
262
127
def rename(self):
263
128
"""Derived from the Avahi example code"""
264
129
if self.rename_count >= self.max_renames:
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
130
logger.critical(u"No suitable Zeroconf service name found"
131
u" after %i retries, exiting.",
267
132
self.rename_count)
268
raise AvahiServiceError("Too many renames")
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
133
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
135
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
137
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
273
140
self.remove()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
141
self.add()
280
142
self.rename_count += 1
281
143
def remove(self):
282
144
"""Derived from the Avahi example code"""
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
286
if self.group is not None:
287
self.group.Reset()
145
if group is not None:
146
group.Reset()
288
147
def add(self):
289
148
"""Derived from the Avahi example code"""
290
self.remove()
291
if self.group is None:
292
self.group = dbus.Interface(
293
self.bus.get_object(avahi.DBUS_NAME,
294
self.server.EntryGroupNew()),
295
avahi.DBUS_INTERFACE_ENTRY_GROUP)
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
300
self.name, self.type)
301
self.group.AddService(
302
self.interface,
303
self.protocol,
304
dbus.UInt32(0), # flags
305
self.name, self.type,
306
self.domain, self.host,
307
dbus.UInt16(self.port),
308
avahi.string_array_to_txt_array(self.TXT))
309
self.group.Commit()
310
def entry_group_state_changed(self, state, error):
311
"""Derived from the Avahi example code"""
312
logger.debug("Avahi entry group state change: %i", state)
313
314
if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
logger.debug("Zeroconf service established.")
316
elif state == avahi.ENTRY_GROUP_COLLISION:
317
logger.info("Zeroconf service name collision.")
318
self.rename()
319
elif state == avahi.ENTRY_GROUP_FAILURE:
320
logger.critical("Avahi: Error in group state changed %s",
321
unicode(error))
322
raise AvahiGroupError("State changed: %s"
323
% unicode(error))
324
def cleanup(self):
325
"""Derived from the Avahi example code"""
326
if self.group is not None:
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
332
self.group = None
333
self.remove()
334
def server_state_changed(self, state, error=None):
335
"""Derived from the Avahi example code"""
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
351
elif state == avahi.SERVER_RUNNING:
352
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
358
def activate(self):
359
"""Derived from the Avahi example code"""
360
if self.server is None:
361
self.server = dbus.Interface(
362
self.bus.get_object(avahi.DBUS_NAME,
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
365
avahi.DBUS_INTERFACE_SERVER)
366
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
368
self.server_state_changed(self.server.GetState())
369
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
379
380
def _timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
386
class Client(object):
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
152
(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
entry_group_state_changed)
157
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
171
# End of Avahi example code
172
173
174
def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
179
class Client(dbus.service.Object):
387
180
"""A representation of a client host served by this server.
388
389
181
Attributes:
390
_approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
182
name: string; from the config file, used in log messages and
183
D-Bus identifiers
184
fingerprint: string (40 or 32 hexadecimal digits); used to
185
uniquely identify the client
186
secret: bytestring; sent verbatim (over TLS) to client
187
host: string; available for use by the checker command
188
created: datetime.datetime(); (UTC) object creation
189
last_enabled: datetime.datetime(); (UTC)
190
enabled: bool()
191
last_checked_ok: datetime.datetime(); (UTC) or None
192
timeout: datetime.timedelta(); How long from last_checked_ok
193
until this client is invalid
194
interval: datetime.timedelta(); How often to start a new checker
195
disable_hook: If set, called by disable() as disable_hook(self)
393
196
checker: subprocess.Popen(); a running checker process used
394
197
to see if the client lives.
395
198
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
199
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
201
checker_callback_tag: - '' -
202
checker_command: string; External command which is run to check if
203
client lives. %() expansions are done at
399
204
runtime with vars(self) as dict, so that for
400
205
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
405
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
408
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
417
checker, or None.
418
last_enabled: datetime.datetime(); (UTC)
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
428
208
"""
429
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
434
435
209
def timeout_milliseconds(self):
436
210
"Return the 'timeout' attribute in milliseconds"
437
return _timedelta_to_milliseconds(self.timeout)
438
439
def extended_timeout_milliseconds(self):
440
"Return the 'extended_timeout' attribute in milliseconds"
441
return _timedelta_to_milliseconds(self.extended_timeout)
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
442
214
443
215
def interval_milliseconds(self):
444
216
"Return the 'interval' attribute in milliseconds"
445
return _timedelta_to_milliseconds(self.interval)
446
447
def approval_delay_milliseconds(self):
448
return _timedelta_to_milliseconds(self.approval_delay)
449
450
def __init__(self, name = None, config=None):
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
220
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
451
223
"""Note: the 'checker' key in 'config' sets the
452
224
'checker_command' attribute and *not* the 'checker'
453
225
attribute."""
454
226
self.name = name
455
227
if config is None:
456
228
config = {}
457
logger.debug("Creating client %r", self.name)
229
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
458
231
# Uppercase and remove spaces from fingerprint for later
459
232
# comparison purposes with return value from the fingerprint()
460
233
# function
461
234
self.fingerprint = (config["fingerprint"].upper()
462
.replace(" ", ""))
463
logger.debug(" Fingerprint: %s", self.fingerprint)
235
.replace(u" ", u""))
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
464
237
if "secret" in config:
465
self.secret = config["secret"].decode("base64")
238
self.secret = config["secret"].decode(u"base64")
466
239
elif "secfile" in config:
467
with open(os.path.expanduser(os.path.expandvars
468
(config["secfile"])),
469
"rb") as secfile:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
470
243
self.secret = secfile.read()
471
244
else:
472
raise TypeError("No secret or secfile for client %s"
245
raise TypeError(u"No secret or secfile for client %s"
473
246
% self.name)
474
247
self.host = config.get("host", "")
475
248
self.created = datetime.datetime.utcnow()
476
self.enabled = True
477
self.last_approval_request = None
478
self.last_enabled = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
479
251
self.last_checked_ok = None
480
self.last_checker_status = None
481
252
self.timeout = string_to_delta(config["timeout"])
482
self.extended_timeout = string_to_delta(config
483
["extended_timeout"])
484
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
485
255
self.checker = None
486
256
self.checker_initiator_tag = None
487
257
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
489
258
self.checker_callback_tag = None
490
259
self.checker_command = config["checker"]
491
self.current_checker_command = None
492
self._approved = None
493
self.approved_by_default = config.get("approved_by_default",
494
True)
495
self.approvals_pending = 0
496
self.approval_delay = string_to_delta(
497
config["approval_delay"])
498
self.approval_duration = string_to_delta(
499
config["approval_duration"])
500
self.changedstate = (multiprocessing_manager
501
.Condition(multiprocessing_manager
502
.Lock()))
503
self.client_structure = [attr for attr in
504
self.__dict__.iterkeys()
505
if not attr.startswith("_")]
506
self.client_structure.append("client_structure")
507
508
for name, t in inspect.getmembers(type(self),
509
lambda obj:
510
isinstance(obj,
511
property)):
512
if not name.startswith("_"):
513
self.client_structure.append(name)
514
515
# Send notice to process children that client state has changed
516
def send_changedstate(self):
517
with self.changedstate:
518
self.changedstate.notify_all()
260
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
519
270
520
271
def enable(self):
521
272
"""Start this client's checker and timeout hooks"""
522
if getattr(self, "enabled", False):
523
# Already enabled
524
return
525
self.send_changedstate()
526
self.expires = datetime.datetime.utcnow() + self.timeout
273
self.last_enabled = datetime.datetime.utcnow()
274
# Schedule a new checker to be started an 'interval' from now,
275
# and every interval from then on.
276
self.checker_initiator_tag = (gobject.timeout_add
277
(self.interval_milliseconds(),
278
self.start_checker))
279
# Also start a new checker *right now*.
280
self.start_checker()
281
# Schedule a disable() when 'timeout' has passed
282
self.disable_initiator_tag = (gobject.timeout_add
283
(self.timeout_milliseconds(),
284
self.disable))
527
285
self.enabled = True
528
self.last_enabled = datetime.datetime.utcnow()
529
self.init_checker()
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
530
293
531
def disable(self, quiet=True):
294
def disable(self):
532
295
"""Disable this client."""
533
296
if not getattr(self, "enabled", False):
534
297
return False
535
if not quiet:
536
self.send_changedstate()
537
if not quiet:
538
logger.info("Disabling client %s", self.name)
298
logger.info(u"Disabling client %s", self.name)
539
299
if getattr(self, "disable_initiator_tag", False):
540
300
gobject.source_remove(self.disable_initiator_tag)
541
301
self.disable_initiator_tag = None
542
self.expires = None
543
302
if getattr(self, "checker_initiator_tag", False):
544
303
gobject.source_remove(self.checker_initiator_tag)
545
304
self.checker_initiator_tag = None
546
305
self.stop_checker()
306
if self.disable_hook:
307
self.disable_hook(self)
547
308
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
548
313
# Do not run this again if called by a gobject.timeout_add
549
314
return False
550
315
551
316
def __del__(self):
317
self.disable_hook = None
552
318
self.disable()
553
319
554
def init_checker(self):
555
# Schedule a new checker to be started an 'interval' from now,
556
# and every interval from then on.
557
self.checker_initiator_tag = (gobject.timeout_add
558
(self.interval_milliseconds(),
559
self.start_checker))
560
# Schedule a disable() when 'timeout' has passed
561
self.disable_initiator_tag = (gobject.timeout_add
562
(self.timeout_milliseconds(),
563
self.disable))
564
# Also start a new checker *right now*.
565
self.start_checker()
566
567
320
def checker_callback(self, pid, condition, command):
568
321
"""The checker has completed, so take appropriate actions."""
569
322
self.checker_callback_tag = None
570
323
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
571
328
if os.WIFEXITED(condition):
572
self.last_checker_status = os.WEXITSTATUS(condition)
573
if self.last_checker_status == 0:
574
logger.info("Checker for %(name)s succeeded",
329
exitstatus = os.WEXITSTATUS(condition)
330
if exitstatus == 0:
331
logger.info(u"Checker for %(name)s succeeded",
575
332
vars(self))
576
333
self.checked_ok()
577
334
else:
578
logger.info("Checker for %(name)s failed",
335
logger.info(u"Checker for %(name)s failed",
579
336
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
580
342
else:
581
self.last_checker_status = -1
582
logger.warning("Checker for %(name)s crashed?",
343
logger.warning(u"Checker for %(name)s crashed?",
583
344
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
584
350
585
def checked_ok(self, timeout=None):
351
def checked_ok(self):
586
352
"""Bump up the timeout for this client.
587
588
353
This should only be called when the client has been seen,
589
354
alive and well.
590
355
"""
591
if timeout is None:
592
timeout = self.timeout
593
356
self.last_checked_ok = datetime.datetime.utcnow()
594
if self.disable_initiator_tag is not None:
595
gobject.source_remove(self.disable_initiator_tag)
596
if getattr(self, "enabled", False):
597
self.disable_initiator_tag = (gobject.timeout_add
598
(_timedelta_to_milliseconds
599
(timeout), self.disable))
600
self.expires = datetime.datetime.utcnow() + timeout
601
602
def need_approval(self):
603
self.last_approval_request = datetime.datetime.utcnow()
357
gobject.source_remove(self.disable_initiator_tag)
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
604
367
605
368
def start_checker(self):
606
369
"""Start a new checker subprocess if one is not running.
607
608
370
If a checker already exists, leave it running and do
609
371
nothing."""
610
372
# The reason for not killing a running checker is that if we
613
375
# client would inevitably timeout, since no checker would get
614
376
# a chance to run to completion. If we instead leave running
615
377
# checkers alone, the checker would have to take more time
616
# than 'timeout' for the client to be disabled, which is as it
617
# should be.
618
619
# If a checker exists, make sure it is not a zombie
620
try:
621
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
622
except (AttributeError, OSError) as error:
623
if (isinstance(error, OSError)
624
and error.errno != errno.ECHILD):
625
raise error
626
else:
627
if pid:
628
logger.warning("Checker was a zombie")
629
gobject.source_remove(self.checker_callback_tag)
630
self.checker_callback(pid, status,
631
self.current_checker_command)
632
# Start a new checker if needed
378
# than 'timeout' for the client to be declared invalid, which
379
# is as it should be.
633
380
if self.checker is None:
634
381
try:
635
382
# In case checker_command has exactly one % operator
636
383
command = self.checker_command % self.host
637
384
except TypeError:
638
385
# Escape attributes for the shell
639
escaped_attrs = dict(
640
(attr,
641
re.escape(unicode(str(getattr(self, attr, "")),
642
errors=
643
'replace')))
644
for attr in
645
self.runtime_expansions)
646
386
escaped_attrs = dict((key, re.escape(str(val)))
387
for key, val in
388
vars(self).iteritems())
647
389
try:
648
390
command = self.checker_command % escaped_attrs
649
except TypeError as error:
650
logger.error('Could not format string "%s":'
651
' %s', self.checker_command, error)
391
except TypeError, error:
392
logger.error(u'Could not format string "%s":'
393
u' %s', self.checker_command, error)
652
394
return True # Try again later
653
self.current_checker_command = command
654
395
try:
655
logger.info("Starting checker %r for %s",
396
logger.info(u"Starting checker %r for %s",
656
397
command, self.name)
657
398
# We don't need to redirect stdout and stderr, since
658
399
# in normal mode, that is already done by daemon(),
661
402
self.checker = subprocess.Popen(command,
662
403
close_fds=True,
663
404
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
664
411
self.checker_callback_tag = (gobject.child_watch_add
665
412
(self.checker.pid,
666
413
self.checker_callback,
667
414
data=command))
668
# The checker may have completed before the gobject
669
# watch was added. Check for this.
670
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
671
if pid:
672
gobject.source_remove(self.checker_callback_tag)
673
self.checker_callback(pid, status, command)
674
except OSError as error:
675
logger.error("Failed to start subprocess: %s",
415
except OSError, error:
416
logger.error(u"Failed to start subprocess: %s",
676
417
error)
677
418
# Re-run this periodically if run by gobject.timeout_add
678
419
return True
684
425
self.checker_callback_tag = None
685
426
if getattr(self, "checker", None) is None:
686
427
return
687
logger.debug("Stopping checker for %(name)s", vars(self))
428
logger.debug(u"Stopping checker for %(name)s", vars(self))
688
429
try:
689
430
os.kill(self.checker.pid, signal.SIGTERM)
690
#time.sleep(0.5)
431
#os.sleep(0.5)
691
432
#if self.checker.poll() is None:
692
433
# os.kill(self.checker.pid, signal.SIGKILL)
693
except OSError as error:
434
except OSError, error:
694
435
if error.errno != errno.ESRCH: # No such process
695
436
raise
696
437
self.checker = None
697
698
699
def dbus_service_property(dbus_interface, signature="v",
700
access="readwrite", byte_arrays=False):
701
"""Decorators for marking methods of a DBusObjectWithProperties to
702
become properties on the D-Bus.
703
704
The decorated method will be called with no arguments by "Get"
705
and with one argument by "Set".
706
707
The parameters, where they are supported, are the same as
708
dbus.service.method, except there is only "signature", since the
709
type from Get() and the type sent to Set() is the same.
710
"""
711
# Encoding deeply encoded byte arrays is not supported yet by the
712
# "Set" method, so we fail early here:
713
if byte_arrays and signature != "ay":
714
raise ValueError("Byte arrays not supported for non-'ay'"
715
" signature %r" % signature)
716
def decorator(func):
717
func._dbus_is_property = True
718
func._dbus_interface = dbus_interface
719
func._dbus_signature = signature
720
func._dbus_access = access
721
func._dbus_name = func.__name__
722
if func._dbus_name.endswith("_dbus_property"):
723
func._dbus_name = func._dbus_name[:-14]
724
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
725
return func
726
return decorator
727
728
729
class DBusPropertyException(dbus.exceptions.DBusException):
730
"""A base class for D-Bus property-related exceptions
731
"""
732
def __unicode__(self):
733
return unicode(str(self))
734
735
736
class DBusPropertyAccessException(DBusPropertyException):
737
"""A property's access permissions disallows an operation.
738
"""
739
pass
740
741
742
class DBusPropertyNotFound(DBusPropertyException):
743
"""An attempt was made to access a non-existing property.
744
"""
745
pass
746
747
748
class DBusObjectWithProperties(dbus.service.Object):
749
"""A D-Bus object with properties.
750
751
Classes inheriting from this can use the dbus_service_property
752
decorator to expose methods as D-Bus properties. It exposes the
753
standard Get(), Set(), and GetAll() methods on the D-Bus.
754
"""
755
756
@staticmethod
757
def _is_dbus_property(obj):
758
return getattr(obj, "_dbus_is_property", False)
759
760
def _get_all_dbus_properties(self):
761
"""Returns a generator of (name, attribute) pairs
762
"""
763
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
764
for cls in self.__class__.__mro__
765
for name, prop in
766
inspect.getmembers(cls, self._is_dbus_property))
767
768
def _get_dbus_property(self, interface_name, property_name):
769
"""Returns a bound method if one exists which is a D-Bus
770
property with the specified name and interface.
771
"""
772
for cls in self.__class__.__mro__:
773
for name, value in (inspect.getmembers
774
(cls, self._is_dbus_property)):
775
if (value._dbus_name == property_name
776
and value._dbus_interface == interface_name):
777
return value.__get__(self)
778
779
# No such property
780
raise DBusPropertyNotFound(self.dbus_object_path + ":"
781
+ interface_name + "."
782
+ property_name)
783
784
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
785
out_signature="v")
786
def Get(self, interface_name, property_name):
787
"""Standard D-Bus property Get() method, see D-Bus standard.
788
"""
789
prop = self._get_dbus_property(interface_name, property_name)
790
if prop._dbus_access == "write":
791
raise DBusPropertyAccessException(property_name)
792
value = prop()
793
if not hasattr(value, "variant_level"):
794
return value
795
return type(value)(value, variant_level=value.variant_level+1)
796
797
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
798
def Set(self, interface_name, property_name, value):
799
"""Standard D-Bus property Set() method, see D-Bus standard.
800
"""
801
prop = self._get_dbus_property(interface_name, property_name)
802
if prop._dbus_access == "read":
803
raise DBusPropertyAccessException(property_name)
804
if prop._dbus_get_args_options["byte_arrays"]:
805
# The byte_arrays option is not supported yet on
806
# signatures other than "ay".
807
if prop._dbus_signature != "ay":
808
raise ValueError
809
value = dbus.ByteArray(''.join(unichr(byte)
810
for byte in value))
811
prop(value)
812
813
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
814
out_signature="a{sv}")
815
def GetAll(self, interface_name):
816
"""Standard D-Bus property GetAll() method, see D-Bus
817
standard.
818
819
Note: Will not include properties with access="write".
820
"""
821
properties = {}
822
for name, prop in self._get_all_dbus_properties():
823
if (interface_name
824
and interface_name != prop._dbus_interface):
825
# Interface non-empty but did not match
826
continue
827
# Ignore write-only properties
828
if prop._dbus_access == "write":
829
continue
830
value = prop()
831
if not hasattr(value, "variant_level"):
832
properties[name] = value
833
continue
834
properties[name] = type(value)(value, variant_level=
835
value.variant_level+1)
836
return dbus.Dictionary(properties, signature="sv")
837
838
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
839
out_signature="s",
840
path_keyword='object_path',
841
connection_keyword='connection')
842
def Introspect(self, object_path, connection):
843
"""Standard D-Bus method, overloaded to insert property tags.
844
"""
845
xmlstring = dbus.service.Object.Introspect(self, object_path,
846
connection)
847
try:
848
document = xml.dom.minidom.parseString(xmlstring)
849
def make_tag(document, name, prop):
850
e = document.createElement("property")
851
e.setAttribute("name", name)
852
e.setAttribute("type", prop._dbus_signature)
853
e.setAttribute("access", prop._dbus_access)
854
return e
855
for if_tag in document.getElementsByTagName("interface"):
856
for tag in (make_tag(document, name, prop)
857
for name, prop
858
in self._get_all_dbus_properties()
859
if prop._dbus_interface
860
== if_tag.getAttribute("name")):
861
if_tag.appendChild(tag)
862
# Add the names to the return values for the
863
# "org.freedesktop.DBus.Properties" methods
864
if (if_tag.getAttribute("name")
865
== "org.freedesktop.DBus.Properties"):
866
for cn in if_tag.getElementsByTagName("method"):
867
if cn.getAttribute("name") == "Get":
868
for arg in cn.getElementsByTagName("arg"):
869
if (arg.getAttribute("direction")
870
== "out"):
871
arg.setAttribute("name", "value")
872
elif cn.getAttribute("name") == "GetAll":
873
for arg in cn.getElementsByTagName("arg"):
874
if (arg.getAttribute("direction")
875
== "out"):
876
arg.setAttribute("name", "props")
877
xmlstring = document.toxml("utf-8")
878
document.unlink()
879
except (AttributeError, xml.dom.DOMException,
880
xml.parsers.expat.ExpatError) as error:
881
logger.error("Failed to override Introspection method",
882
error)
883
return xmlstring
884
885
886
def datetime_to_dbus (dt, variant_level=0):
887
"""Convert a UTC datetime.datetime() to a D-Bus type."""
888
if dt is None:
889
return dbus.String("", variant_level = variant_level)
890
return dbus.String(dt.isoformat(),
891
variant_level=variant_level)
892
893
894
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
895
.__metaclass__):
896
"""Applied to an empty subclass of a D-Bus object, this metaclass
897
will add additional D-Bus attributes matching a certain pattern.
898
"""
899
def __new__(mcs, name, bases, attr):
900
# Go through all the base classes which could have D-Bus
901
# methods, signals, or properties in them
902
for base in (b for b in bases
903
if issubclass(b, dbus.service.Object)):
904
# Go though all attributes of the base class
905
for attrname, attribute in inspect.getmembers(base):
906
# Ignore non-D-Bus attributes, and D-Bus attributes
907
# with the wrong interface name
908
if (not hasattr(attribute, "_dbus_interface")
909
or not attribute._dbus_interface
910
.startswith("se.recompile.Mandos")):
911
continue
912
# Create an alternate D-Bus interface name based on
913
# the current name
914
alt_interface = (attribute._dbus_interface
915
.replace("se.recompile.Mandos",
916
"se.bsnet.fukt.Mandos"))
917
# Is this a D-Bus signal?
918
if getattr(attribute, "_dbus_is_signal", False):
919
# Extract the original non-method function by
920
# black magic
921
nonmethod_func = (dict(
922
zip(attribute.func_code.co_freevars,
923
attribute.__closure__))["func"]
924
.cell_contents)
925
# Create a new, but exactly alike, function
926
# object, and decorate it to be a new D-Bus signal
927
# with the alternate D-Bus interface name
928
new_function = (dbus.service.signal
929
(alt_interface,
930
attribute._dbus_signature)
931
(types.FunctionType(
932
nonmethod_func.func_code,
933
nonmethod_func.func_globals,
934
nonmethod_func.func_name,
935
nonmethod_func.func_defaults,
936
nonmethod_func.func_closure)))
937
# Define a creator of a function to call both the
938
# old and new functions, so both the old and new
939
# signals gets sent when the function is called
940
def fixscope(func1, func2):
941
"""This function is a scope container to pass
942
func1 and func2 to the "call_both" function
943
outside of its arguments"""
944
def call_both(*args, **kwargs):
945
"""This function will emit two D-Bus
946
signals by calling func1 and func2"""
947
func1(*args, **kwargs)
948
func2(*args, **kwargs)
949
return call_both
950
# Create the "call_both" function and add it to
951
# the class
952
attr[attrname] = fixscope(attribute,
953
new_function)
954
# Is this a D-Bus method?
955
elif getattr(attribute, "_dbus_is_method", False):
956
# Create a new, but exactly alike, function
957
# object. Decorate it to be a new D-Bus method
958
# with the alternate D-Bus interface name. Add it
959
# to the class.
960
attr[attrname] = (dbus.service.method
961
(alt_interface,
962
attribute._dbus_in_signature,
963
attribute._dbus_out_signature)
964
(types.FunctionType
965
(attribute.func_code,
966
attribute.func_globals,
967
attribute.func_name,
968
attribute.func_defaults,
969
attribute.func_closure)))
970
# Is this a D-Bus property?
971
elif getattr(attribute, "_dbus_is_property", False):
972
# Create a new, but exactly alike, function
973
# object, and decorate it to be a new D-Bus
974
# property with the alternate D-Bus interface
975
# name. Add it to the class.
976
attr[attrname] = (dbus_service_property
977
(alt_interface,
978
attribute._dbus_signature,
979
attribute._dbus_access,
980
attribute
981
._dbus_get_args_options
982
["byte_arrays"])
983
(types.FunctionType
984
(attribute.func_code,
985
attribute.func_globals,
986
attribute.func_name,
987
attribute.func_defaults,
988
attribute.func_closure)))
989
return type.__new__(mcs, name, bases, attr)
990
991
992
class ClientDBus(Client, DBusObjectWithProperties):
993
"""A Client class using D-Bus
994
995
Attributes:
996
dbus_object_path: dbus.ObjectPath
997
bus: dbus.SystemBus()
998
"""
999
1000
runtime_expansions = (Client.runtime_expansions
1001
+ ("dbus_object_path",))
1002
1003
# dbus.service.Object doesn't use super(), so we can't either.
1004
1005
def __init__(self, bus = None, *args, **kwargs):
1006
self.bus = bus
1007
Client.__init__(self, *args, **kwargs)
1008
1009
self._approvals_pending = 0
1010
# Only now, when this client is initialized, can it show up on
1011
# the D-Bus
1012
client_object_name = unicode(self.name).translate(
1013
{ord("."): ord("_"),
1014
ord("-"): ord("_")})
1015
self.dbus_object_path = (dbus.ObjectPath
1016
("/clients/" + client_object_name))
1017
DBusObjectWithProperties.__init__(self, self.bus,
1018
self.dbus_object_path)
1019
1020
def notifychangeproperty(transform_func,
1021
dbus_name, type_func=lambda x: x,
1022
variant_level=1):
1023
""" Modify a variable so that it's a property which announces
1024
its changes to DBus.
1025
1026
transform_fun: Function that takes a value and a variant_level
1027
and transforms it to a D-Bus type.
1028
dbus_name: D-Bus name of the variable
1029
type_func: Function that transform the value before sending it
1030
to the D-Bus. Default: no transform
1031
variant_level: D-Bus variant level. Default: 1
1032
"""
1033
attrname = "_{0}".format(dbus_name)
1034
def setter(self, value):
1035
if hasattr(self, "dbus_object_path"):
1036
if (not hasattr(self, attrname) or
1037
type_func(getattr(self, attrname, None))
1038
!= type_func(value)):
1039
dbus_value = transform_func(type_func(value),
1040
variant_level
1041
=variant_level)
1042
self.PropertyChanged(dbus.String(dbus_name),
1043
dbus_value)
1044
setattr(self, attrname, value)
1045
1046
return property(lambda self: getattr(self, attrname), setter)
1047
1048
1049
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1050
approvals_pending = notifychangeproperty(dbus.Boolean,
1051
"ApprovalPending",
1052
type_func = bool)
1053
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1054
last_enabled = notifychangeproperty(datetime_to_dbus,
1055
"LastEnabled")
1056
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1057
type_func = lambda checker:
1058
checker is not None)
1059
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1060
"LastCheckedOK")
1061
last_approval_request = notifychangeproperty(
1062
datetime_to_dbus, "LastApprovalRequest")
1063
approved_by_default = notifychangeproperty(dbus.Boolean,
1064
"ApprovedByDefault")
1065
approval_delay = notifychangeproperty(dbus.UInt16,
1066
"ApprovalDelay",
1067
type_func =
1068
_timedelta_to_milliseconds)
1069
approval_duration = notifychangeproperty(
1070
dbus.UInt16, "ApprovalDuration",
1071
type_func = _timedelta_to_milliseconds)
1072
host = notifychangeproperty(dbus.String, "Host")
1073
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1074
type_func =
1075
_timedelta_to_milliseconds)
1076
extended_timeout = notifychangeproperty(
1077
dbus.UInt16, "ExtendedTimeout",
1078
type_func = _timedelta_to_milliseconds)
1079
interval = notifychangeproperty(dbus.UInt16,
1080
"Interval",
1081
type_func =
1082
_timedelta_to_milliseconds)
1083
checker_command = notifychangeproperty(dbus.String, "Checker")
1084
1085
del notifychangeproperty
1086
1087
def __del__(self, *args, **kwargs):
1088
try:
1089
self.remove_from_connection()
1090
except LookupError:
1091
pass
1092
if hasattr(DBusObjectWithProperties, "__del__"):
1093
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1094
Client.__del__(self, *args, **kwargs)
1095
1096
def checker_callback(self, pid, condition, command,
1097
*args, **kwargs):
1098
self.checker_callback_tag = None
1099
self.checker = None
1100
if os.WIFEXITED(condition):
1101
exitstatus = os.WEXITSTATUS(condition)
1102
# Emit D-Bus signal
1103
self.CheckerCompleted(dbus.Int16(exitstatus),
1104
dbus.Int64(condition),
1105
dbus.String(command))
1106
else:
1107
# Emit D-Bus signal
1108
self.CheckerCompleted(dbus.Int16(-1),
1109
dbus.Int64(condition),
1110
dbus.String(command))
1111
1112
return Client.checker_callback(self, pid, condition, command,
1113
*args, **kwargs)
1114
1115
def start_checker(self, *args, **kwargs):
1116
old_checker = self.checker
1117
if self.checker is not None:
1118
old_checker_pid = self.checker.pid
1119
else:
1120
old_checker_pid = None
1121
r = Client.start_checker(self, *args, **kwargs)
1122
# Only if new checker process was started
1123
if (self.checker is not None
1124
and old_checker_pid != self.checker.pid):
1125
# Emit D-Bus signal
1126
self.CheckerStarted(self.current_checker_command)
1127
return r
1128
1129
def _reset_approved(self):
1130
self._approved = None
1131
return False
1132
1133
def approve(self, value=True):
1134
self.send_changedstate()
1135
self._approved = value
1136
gobject.timeout_add(_timedelta_to_milliseconds
1137
(self.approval_duration),
1138
self._reset_approved)
1139
1140
1141
## D-Bus methods, signals & properties
1142
_interface = "se.recompile.Mandos.Client"
1143
1144
## Signals
438
if self.use_dbus:
439
self.PropertyChanged(dbus.String(u"checker_running"),
440
dbus.Boolean(False, variant_level=1))
441
442
def still_valid(self):
443
"""Has the timeout not yet passed for this client?"""
444
if not getattr(self, "enabled", False):
445
return False
446
now = datetime.datetime.utcnow()
447
if self.last_checked_ok is None:
448
return now < (self.created + self.timeout)
449
else:
450
return now < (self.last_checked_ok + self.timeout)
451
452
## D-Bus methods & signals
453
_interface = u"se.bsnet.fukt.Mandos.Client"
454
455
# CheckedOK - method
456
CheckedOK = dbus.service.method(_interface)(checked_ok)
457
CheckedOK.__name__ = "CheckedOK"
1145
458
1146
459
# CheckerCompleted - signal
1147
460
@dbus.service.signal(_interface, signature="nxs")
1155
468
"D-Bus signal"
1156
469
pass
1157
470
471
# GetAllProperties - method
472
@dbus.service.method(_interface, out_signature="a{sv}")
473
def GetAllProperties(self):
474
"D-Bus method"
475
return dbus.Dictionary({
476
dbus.String("name"):
477
dbus.String(self.name, variant_level=1),
478
dbus.String("fingerprint"):
479
dbus.String(self.fingerprint, variant_level=1),
480
dbus.String("host"):
481
dbus.String(self.host, variant_level=1),
482
dbus.String("created"):
483
_datetime_to_dbus(self.created, variant_level=1),
484
dbus.String("last_enabled"):
485
(_datetime_to_dbus(self.last_enabled,
486
variant_level=1)
487
if self.last_enabled is not None
488
else dbus.Boolean(False, variant_level=1)),
489
dbus.String("enabled"):
490
dbus.Boolean(self.enabled, variant_level=1),
491
dbus.String("last_checked_ok"):
492
(_datetime_to_dbus(self.last_checked_ok,
493
variant_level=1)
494
if self.last_checked_ok is not None
495
else dbus.Boolean (False, variant_level=1)),
496
dbus.String("timeout"):
497
dbus.UInt64(self.timeout_milliseconds(),
498
variant_level=1),
499
dbus.String("interval"):
500
dbus.UInt64(self.interval_milliseconds(),
501
variant_level=1),
502
dbus.String("checker"):
503
dbus.String(self.checker_command,
504
variant_level=1),
505
dbus.String("checker_running"):
506
dbus.Boolean(self.checker is not None,
507
variant_level=1),
508
dbus.String("object_path"):
509
dbus.ObjectPath(self.dbus_object_path,
510
variant_level=1)
511
}, signature="sv")
512
513
# IsStillValid - method
514
IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
(still_valid))
516
IsStillValid.__name__ = "IsStillValid"
517
1158
518
# PropertyChanged - signal
1159
519
@dbus.service.signal(_interface, signature="sv")
1160
520
def PropertyChanged(self, property, value):
1161
521
"D-Bus signal"
1162
522
pass
1163
523
1164
# GotSecret - signal
1165
@dbus.service.signal(_interface)
1166
def GotSecret(self):
1167
"""D-Bus signal
1168
Is sent after a successful transfer of secret from the Mandos
1169
server to mandos-client
1170
"""
1171
pass
1172
1173
# Rejected - signal
1174
@dbus.service.signal(_interface, signature="s")
1175
def Rejected(self, reason):
1176
"D-Bus signal"
1177
pass
1178
1179
# NeedApproval - signal
1180
@dbus.service.signal(_interface, signature="tb")
1181
def NeedApproval(self, timeout, default):
1182
"D-Bus signal"
1183
return self.need_approval()
1184
1185
# NeRwequest - signal
1186
@dbus.service.signal(_interface, signature="s")
1187
def NewRequest(self, ip):
1188
"""D-Bus signal
1189
Is sent after a client request a password.
1190
"""
1191
pass
1192
1193
## Methods
1194
1195
# Approve - method
1196
@dbus.service.method(_interface, in_signature="b")
1197
def Approve(self, value):
1198
self.approve(value)
1199
1200
# CheckedOK - method
1201
@dbus.service.method(_interface)
1202
def CheckedOK(self):
1203
self.checked_ok()
524
# SetChecker - method
525
@dbus.service.method(_interface, in_signature="s")
526
def SetChecker(self, checker):
527
"D-Bus setter method"
528
self.checker_command = checker
529
# Emit D-Bus signal
530
self.PropertyChanged(dbus.String(u"checker"),
531
dbus.String(self.checker_command,
532
variant_level=1))
533
534
# SetHost - method
535
@dbus.service.method(_interface, in_signature="s")
536
def SetHost(self, host):
537
"D-Bus setter method"
538
self.host = host
539
# Emit D-Bus signal
540
self.PropertyChanged(dbus.String(u"host"),
541
dbus.String(self.host, variant_level=1))
542
543
# SetInterval - method
544
@dbus.service.method(_interface, in_signature="t")
545
def SetInterval(self, milliseconds):
546
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
547
# Emit D-Bus signal
548
self.PropertyChanged(dbus.String(u"interval"),
549
(dbus.UInt64(self.interval_milliseconds(),
550
variant_level=1)))
551
552
# SetSecret - method
553
@dbus.service.method(_interface, in_signature="ay",
554
byte_arrays=True)
555
def SetSecret(self, secret):
556
"D-Bus setter method"
557
self.secret = str(secret)
558
559
# SetTimeout - method
560
@dbus.service.method(_interface, in_signature="t")
561
def SetTimeout(self, milliseconds):
562
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
563
# Emit D-Bus signal
564
self.PropertyChanged(dbus.String(u"timeout"),
565
(dbus.UInt64(self.timeout_milliseconds(),
566
variant_level=1)))
1204
567
1205
568
# Enable - method
1206
@dbus.service.method(_interface)
1207
def Enable(self):
1208
"D-Bus method"
1209
self.enable()
569
Enable = dbus.service.method(_interface)(enable)
570
Enable.__name__ = "Enable"
1210
571
1211
572
# StartChecker - method
1212
573
@dbus.service.method(_interface)
1221
582
self.disable()
1222
583
1223
584
# StopChecker - method
1224
@dbus.service.method(_interface)
1225
def StopChecker(self):
1226
self.stop_checker()
1227
1228
## Properties
1229
1230
# ApprovalPending - property
1231
@dbus_service_property(_interface, signature="b", access="read")
1232
def ApprovalPending_dbus_property(self):
1233
return dbus.Boolean(bool(self.approvals_pending))
1234
1235
# ApprovedByDefault - property
1236
@dbus_service_property(_interface, signature="b",
1237
access="readwrite")
1238
def ApprovedByDefault_dbus_property(self, value=None):
1239
if value is None: # get
1240
return dbus.Boolean(self.approved_by_default)
1241
self.approved_by_default = bool(value)
1242
1243
# ApprovalDelay - property
1244
@dbus_service_property(_interface, signature="t",
1245
access="readwrite")
1246
def ApprovalDelay_dbus_property(self, value=None):
1247
if value is None: # get
1248
return dbus.UInt64(self.approval_delay_milliseconds())
1249
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1250
1251
# ApprovalDuration - property
1252
@dbus_service_property(_interface, signature="t",
1253
access="readwrite")
1254
def ApprovalDuration_dbus_property(self, value=None):
1255
if value is None: # get
1256
return dbus.UInt64(_timedelta_to_milliseconds(
1257
self.approval_duration))
1258
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1259
1260
# Name - property
1261
@dbus_service_property(_interface, signature="s", access="read")
1262
def Name_dbus_property(self):
1263
return dbus.String(self.name)
1264
1265
# Fingerprint - property
1266
@dbus_service_property(_interface, signature="s", access="read")
1267
def Fingerprint_dbus_property(self):
1268
return dbus.String(self.fingerprint)
1269
1270
# Host - property
1271
@dbus_service_property(_interface, signature="s",
1272
access="readwrite")
1273
def Host_dbus_property(self, value=None):
1274
if value is None: # get
1275
return dbus.String(self.host)
1276
self.host = value
1277
1278
# Created - property
1279
@dbus_service_property(_interface, signature="s", access="read")
1280
def Created_dbus_property(self):
1281
return dbus.String(datetime_to_dbus(self.created))
1282
1283
# LastEnabled - property
1284
@dbus_service_property(_interface, signature="s", access="read")
1285
def LastEnabled_dbus_property(self):
1286
return datetime_to_dbus(self.last_enabled)
1287
1288
# Enabled - property
1289
@dbus_service_property(_interface, signature="b",
1290
access="readwrite")
1291
def Enabled_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.Boolean(self.enabled)
1294
if value:
1295
self.enable()
1296
else:
1297
self.disable()
1298
1299
# LastCheckedOK - property
1300
@dbus_service_property(_interface, signature="s",
1301
access="readwrite")
1302
def LastCheckedOK_dbus_property(self, value=None):
1303
if value is not None:
1304
self.checked_ok()
1305
return
1306
return datetime_to_dbus(self.last_checked_ok)
1307
1308
# Expires - property
1309
@dbus_service_property(_interface, signature="s", access="read")
1310
def Expires_dbus_property(self):
1311
return datetime_to_dbus(self.expires)
1312
1313
# LastApprovalRequest - property
1314
@dbus_service_property(_interface, signature="s", access="read")
1315
def LastApprovalRequest_dbus_property(self):
1316
return datetime_to_dbus(self.last_approval_request)
1317
1318
# Timeout - property
1319
@dbus_service_property(_interface, signature="t",
1320
access="readwrite")
1321
def Timeout_dbus_property(self, value=None):
1322
if value is None: # get
1323
return dbus.UInt64(self.timeout_milliseconds())
1324
self.timeout = datetime.timedelta(0, 0, 0, value)
1325
if getattr(self, "disable_initiator_tag", None) is None:
1326
return
1327
# Reschedule timeout
1328
gobject.source_remove(self.disable_initiator_tag)
1329
self.disable_initiator_tag = None
1330
self.expires = None
1331
time_to_die = _timedelta_to_milliseconds((self
1332
.last_checked_ok
1333
+ self.timeout)
1334
- datetime.datetime
1335
.utcnow())
1336
if time_to_die <= 0:
1337
# The timeout has passed
1338
self.disable()
1339
else:
1340
self.expires = (datetime.datetime.utcnow()
1341
+ datetime.timedelta(milliseconds =
1342
time_to_die))
1343
self.disable_initiator_tag = (gobject.timeout_add
1344
(time_to_die, self.disable))
1345
1346
# ExtendedTimeout - property
1347
@dbus_service_property(_interface, signature="t",
1348
access="readwrite")
1349
def ExtendedTimeout_dbus_property(self, value=None):
1350
if value is None: # get
1351
return dbus.UInt64(self.extended_timeout_milliseconds())
1352
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1353
1354
# Interval - property
1355
@dbus_service_property(_interface, signature="t",
1356
access="readwrite")
1357
def Interval_dbus_property(self, value=None):
1358
if value is None: # get
1359
return dbus.UInt64(self.interval_milliseconds())
1360
self.interval = datetime.timedelta(0, 0, 0, value)
1361
if getattr(self, "checker_initiator_tag", None) is None:
1362
return
1363
# Reschedule checker run
1364
gobject.source_remove(self.checker_initiator_tag)
1365
self.checker_initiator_tag = (gobject.timeout_add
1366
(value, self.start_checker))
1367
self.start_checker() # Start one now, too
1368
1369
# Checker - property
1370
@dbus_service_property(_interface, signature="s",
1371
access="readwrite")
1372
def Checker_dbus_property(self, value=None):
1373
if value is None: # get
1374
return dbus.String(self.checker_command)
1375
self.checker_command = value
1376
1377
# CheckerRunning - property
1378
@dbus_service_property(_interface, signature="b",
1379
access="readwrite")
1380
def CheckerRunning_dbus_property(self, value=None):
1381
if value is None: # get
1382
return dbus.Boolean(self.checker is not None)
1383
if value:
1384
self.start_checker()
1385
else:
1386
self.stop_checker()
1387
1388
# ObjectPath - property
1389
@dbus_service_property(_interface, signature="o", access="read")
1390
def ObjectPath_dbus_property(self):
1391
return self.dbus_object_path # is already a dbus.ObjectPath
1392
1393
# Secret = property
1394
@dbus_service_property(_interface, signature="ay",
1395
access="write", byte_arrays=True)
1396
def Secret_dbus_property(self, value):
1397
self.secret = str(value)
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
1398
587
1399
588
del _interface
1400
589
1401
590
1402
class ProxyClient(object):
1403
def __init__(self, child_pipe, fpr, address):
1404
self._pipe = child_pipe
1405
self._pipe.send(('init', fpr, address))
1406
if not self._pipe.recv():
1407
raise KeyError()
1408
1409
def __getattribute__(self, name):
1410
if(name == '_pipe'):
1411
return super(ProxyClient, self).__getattribute__(name)
1412
self._pipe.send(('getattr', name))
1413
data = self._pipe.recv()
1414
if data[0] == 'data':
1415
return data[1]
1416
if data[0] == 'function':
1417
def func(*args, **kwargs):
1418
self._pipe.send(('funcall', name, args, kwargs))
1419
return self._pipe.recv()[1]
1420
return func
1421
1422
def __setattr__(self, name, value):
1423
if(name == '_pipe'):
1424
return super(ProxyClient, self).__setattr__(name, value)
1425
self._pipe.send(('setattr', name, value))
1426
1427
1428
class ClientDBusTransitional(ClientDBus):
1429
__metaclass__ = AlternateDBusNamesMetaclass
1430
1431
1432
class ClientHandler(socketserver.BaseRequestHandler, object):
1433
"""A class to handle client connections.
1434
1435
Instantiated once for each connection to handle it.
591
def peer_certificate(session):
592
"Return the peer's OpenPGP certificate as a bytestring"
593
# If not an OpenPGP certificate...
594
if (gnutls.library.functions
595
.gnutls_certificate_type_get(session._c_object)
596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
# ...do the normal thing
598
return session.peer_certificate
599
list_size = ctypes.c_uint(1)
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
603
if not bool(cert_list) and list_size.value != 0:
604
raise gnutls.errors.GNUTLSError("error getting peer"
605
" certificate")
606
if list_size.value == 0:
607
return None
608
cert = cert_list[0]
609
return ctypes.string_at(cert.data, cert.size)
610
611
612
def fingerprint(openpgp):
613
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
# New GnuTLS "datum" with the OpenPGP public key
615
datum = (gnutls.library.types
616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
617
ctypes.POINTER
618
(ctypes.c_ubyte)),
619
ctypes.c_uint(len(openpgp))))
620
# New empty GnuTLS certificate
621
crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
624
# Import the OpenPGP public key into the certificate
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
627
gnutls.library.constants
628
.GNUTLS_OPENPGP_FMT_RAW))
629
# Verify the self signature in the key
630
crtverify = ctypes.c_uint()
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
633
if crtverify.value != 0:
634
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
635
raise gnutls.errors.CertificateSecurityError("Verify failed")
636
# New buffer for the fingerprint
637
buf = ctypes.create_string_buffer(20)
638
buf_len = ctypes.c_size_t()
639
# Get the fingerprint from the certificate into the buffer
640
(gnutls.library.functions
641
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
ctypes.byref(buf_len)))
643
# Deinit the certificate
644
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
# Convert the buffer to a Python bytestring
646
fpr = ctypes.string_at(buf, buf_len.value)
647
# Convert the bytestring to hexadecimal notation
648
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
return hex_fpr
650
651
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
653
"""A TCP request handler class.
654
Instantiated by IPv6_TCPServer for each request to handle it.
1436
655
Note: This will run in its own forked process."""
1437
656
1438
657
def handle(self):
1439
with contextlib.closing(self.server.child_pipe) as child_pipe:
1440
logger.info("TCP connection from: %s",
1441
unicode(self.client_address))
1442
logger.debug("Pipe FD: %d",
1443
self.server.child_pipe.fileno())
1444
1445
session = (gnutls.connection
1446
.ClientSession(self.request,
1447
gnutls.connection
1448
.X509Credentials()))
1449
1450
# Note: gnutls.connection.X509Credentials is really a
1451
# generic GnuTLS certificate credentials object so long as
1452
# no X.509 keys are added to it. Therefore, we can use it
1453
# here despite using OpenPGP certificates.
1454
1455
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1456
# "+AES-256-CBC", "+SHA1",
1457
# "+COMP-NULL", "+CTYPE-OPENPGP",
1458
# "+DHE-DSS"))
1459
# Use a fallback default, since this MUST be set.
1460
priority = self.server.gnutls_priority
1461
if priority is None:
1462
priority = "NORMAL"
1463
(gnutls.library.functions
1464
.gnutls_priority_set_direct(session._c_object,
1465
priority, None))
1466
1467
# Start communication using the Mandos protocol
1468
# Get protocol number
1469
line = self.request.makefile().readline()
1470
logger.debug("Protocol version: %r", line)
1471
try:
1472
if int(line.strip().split()[0]) > 1:
1473
raise RuntimeError
1474
except (ValueError, IndexError, RuntimeError) as error:
1475
logger.error("Unknown protocol version: %s", error)
1476
return
1477
1478
# Start GnuTLS connection
1479
try:
1480
session.handshake()
1481
except gnutls.errors.GNUTLSError as error:
1482
logger.warning("Handshake failed: %s", error)
1483
# Do not run session.bye() here: the session is not
1484
# established. Just abandon the request.
1485
return
1486
logger.debug("Handshake succeeded")
1487
1488
approval_required = False
1489
try:
1490
try:
1491
fpr = self.fingerprint(self.peer_certificate
1492
(session))
1493
except (TypeError,
1494
gnutls.errors.GNUTLSError) as error:
1495
logger.warning("Bad certificate: %s", error)
1496
return
1497
logger.debug("Fingerprint: %s", fpr)
1498
if self.server.use_dbus:
1499
# Emit D-Bus signal
1500
client.NewRequest(str(self.client_address))
1501
1502
try:
1503
client = ProxyClient(child_pipe, fpr,
1504
self.client_address)
1505
except KeyError:
1506
return
1507
1508
if client.approval_delay:
1509
delay = client.approval_delay
1510
client.approvals_pending += 1
1511
approval_required = True
1512
1513
while True:
1514
if not client.enabled:
1515
logger.info("Client %s is disabled",
1516
client.name)
1517
if self.server.use_dbus:
1518
# Emit D-Bus signal
1519
client.Rejected("Disabled")
1520
return
1521
1522
if client._approved or not client.approval_delay:
1523
#We are approved or approval is disabled
1524
break
1525
elif client._approved is None:
1526
logger.info("Client %s needs approval",
1527
client.name)
1528
if self.server.use_dbus:
1529
# Emit D-Bus signal
1530
client.NeedApproval(
1531
client.approval_delay_milliseconds(),
1532
client.approved_by_default)
1533
else:
1534
logger.warning("Client %s was not approved",
1535
client.name)
1536
if self.server.use_dbus:
1537
# Emit D-Bus signal
1538
client.Rejected("Denied")
1539
return
1540
1541
#wait until timeout or approved
1542
time = datetime.datetime.now()
1543
client.changedstate.acquire()
1544
(client.changedstate.wait
1545
(float(client._timedelta_to_milliseconds(delay)
1546
/ 1000)))
1547
client.changedstate.release()
1548
time2 = datetime.datetime.now()
1549
if (time2 - time) >= delay:
1550
if not client.approved_by_default:
1551
logger.warning("Client %s timed out while"
1552
" waiting for approval",
1553
client.name)
1554
if self.server.use_dbus:
1555
# Emit D-Bus signal
1556
client.Rejected("Approval timed out")
1557
return
1558
else:
1559
break
1560
else:
1561
delay -= time2 - time
1562
1563
sent_size = 0
1564
while sent_size < len(client.secret):
1565
try:
1566
sent = session.send(client.secret[sent_size:])
1567
except gnutls.errors.GNUTLSError as error:
1568
logger.warning("gnutls send failed")
1569
return
1570
logger.debug("Sent: %d, remaining: %d",
1571
sent, len(client.secret)
1572
- (sent_size + sent))
1573
sent_size += sent
1574
1575
logger.info("Sending secret to %s", client.name)
1576
# bump the timeout using extended_timeout
1577
client.checked_ok(client.extended_timeout)
1578
if self.server.use_dbus:
1579
# Emit D-Bus signal
1580
client.GotSecret()
1581
1582
finally:
1583
if approval_required:
1584
client.approvals_pending -= 1
1585
try:
1586
session.bye()
1587
except gnutls.errors.GNUTLSError as error:
1588
logger.warning("GnuTLS bye failed")
1589
1590
@staticmethod
1591
def peer_certificate(session):
1592
"Return the peer's OpenPGP certificate as a bytestring"
1593
# If not an OpenPGP certificate...
1594
if (gnutls.library.functions
1595
.gnutls_certificate_type_get(session._c_object)
1596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1597
# ...do the normal thing
1598
return session.peer_certificate
1599
list_size = ctypes.c_uint(1)
1600
cert_list = (gnutls.library.functions
1601
.gnutls_certificate_get_peers
1602
(session._c_object, ctypes.byref(list_size)))
1603
if not bool(cert_list) and list_size.value != 0:
1604
raise gnutls.errors.GNUTLSError("error getting peer"
1605
" certificate")
1606
if list_size.value == 0:
1607
return None
1608
cert = cert_list[0]
1609
return ctypes.string_at(cert.data, cert.size)
1610
1611
@staticmethod
1612
def fingerprint(openpgp):
1613
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1614
# New GnuTLS "datum" with the OpenPGP public key
1615
datum = (gnutls.library.types
1616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1617
ctypes.POINTER
1618
(ctypes.c_ubyte)),
1619
ctypes.c_uint(len(openpgp))))
1620
# New empty GnuTLS certificate
1621
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1622
(gnutls.library.functions
1623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1624
# Import the OpenPGP public key into the certificate
1625
(gnutls.library.functions
1626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1627
gnutls.library.constants
1628
.GNUTLS_OPENPGP_FMT_RAW))
1629
# Verify the self signature in the key
1630
crtverify = ctypes.c_uint()
1631
(gnutls.library.functions
1632
.gnutls_openpgp_crt_verify_self(crt, 0,
1633
ctypes.byref(crtverify)))
1634
if crtverify.value != 0:
1635
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1636
raise (gnutls.errors.CertificateSecurityError
1637
("Verify failed"))
1638
# New buffer for the fingerprint
1639
buf = ctypes.create_string_buffer(20)
1640
buf_len = ctypes.c_size_t()
1641
# Get the fingerprint from the certificate into the buffer
1642
(gnutls.library.functions
1643
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1644
ctypes.byref(buf_len)))
1645
# Deinit the certificate
1646
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1647
# Convert the buffer to a Python bytestring
1648
fpr = ctypes.string_at(buf, buf_len.value)
1649
# Convert the bytestring to hexadecimal notation
1650
hex_fpr = binascii.hexlify(fpr).upper()
1651
return hex_fpr
1652
1653
1654
class MultiprocessingMixIn(object):
1655
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1656
def sub_process_main(self, request, address):
1657
try:
1658
self.finish_request(request, address)
1659
except:
1660
self.handle_error(request, address)
1661
self.close_request(request)
1662
1663
def process_request(self, request, address):
1664
"""Start a new process to process the request."""
1665
proc = multiprocessing.Process(target = self.sub_process_main,
1666
args = (request,
1667
address))
1668
proc.start()
1669
return proc
1670
1671
1672
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1673
""" adds a pipe to the MixIn """
1674
def process_request(self, request, client_address):
1675
"""Overrides and wraps the original process_request().
1676
1677
This function creates a new pipe in self.pipe
1678
"""
1679
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1680
1681
proc = MultiprocessingMixIn.process_request(self, request,
1682
client_address)
1683
self.child_pipe.close()
1684
self.add_pipe(parent_pipe, proc)
1685
1686
def add_pipe(self, parent_pipe, proc):
1687
"""Dummy function; override as necessary"""
1688
raise NotImplementedError
1689
1690
1691
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1692
socketserver.TCPServer, object):
1693
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1694
658
logger.info(u"TCP connection from: %s",
659
unicode(self.client_address))
660
session = (gnutls.connection
661
.ClientSession(self.request,
662
gnutls.connection
663
.X509Credentials()))
664
665
line = self.request.makefile().readline()
666
logger.debug(u"Protocol version: %r", line)
667
try:
668
if int(line.strip().split()[0]) > 1:
669
raise RuntimeError
670
except (ValueError, IndexError, RuntimeError), error:
671
logger.error(u"Unknown protocol version: %s", error)
672
return
673
674
# Note: gnutls.connection.X509Credentials is really a generic
675
# GnuTLS certificate credentials object so long as no X.509
676
# keys are added to it. Therefore, we can use it here despite
677
# using OpenPGP certificates.
678
679
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
680
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
# "+DHE-DSS"))
682
# Use a fallback default, since this MUST be set.
683
priority = self.server.settings.get("priority", "NORMAL")
684
(gnutls.library.functions
685
.gnutls_priority_set_direct(session._c_object,
686
priority, None))
687
688
try:
689
session.handshake()
690
except gnutls.errors.GNUTLSError, error:
691
logger.warning(u"Handshake failed: %s", error)
692
# Do not run session.bye() here: the session is not
693
# established. Just abandon the request.
694
return
695
logger.debug(u"Handshake succeeded")
696
try:
697
fpr = fingerprint(peer_certificate(session))
698
except (TypeError, gnutls.errors.GNUTLSError), error:
699
logger.warning(u"Bad certificate: %s", error)
700
session.bye()
701
return
702
logger.debug(u"Fingerprint: %s", fpr)
703
704
for c in self.server.clients:
705
if c.fingerprint == fpr:
706
client = c
707
break
708
else:
709
logger.warning(u"Client not found for fingerprint: %s",
710
fpr)
711
session.bye()
712
return
713
# Have to check if client.still_valid(), since it is possible
714
# that the client timed out while establishing the GnuTLS
715
# session.
716
if not client.still_valid():
717
logger.warning(u"Client %(name)s is invalid",
718
vars(client))
719
session.bye()
720
return
721
## This won't work here, since we're in a fork.
722
# client.checked_ok()
723
sent_size = 0
724
while sent_size < len(client.secret):
725
sent = session.send(client.secret[sent_size:])
726
logger.debug(u"Sent: %d, remaining: %d",
727
sent, len(client.secret)
728
- (sent_size + sent))
729
sent_size += sent
730
session.bye()
731
732
733
class IPv6_TCPServer(SocketServer.ForkingMixIn,
734
SocketServer.TCPServer, object):
735
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1695
736
Attributes:
737
settings: Server settings
738
clients: Set() of Client objects
1696
739
enabled: Boolean; whether this server is activated yet
1697
interface: None or a network interface name (string)
1698
use_ipv6: Boolean; to use IPv6 or not
1699
740
"""
1700
def __init__(self, server_address, RequestHandlerClass,
1701
interface=None, use_ipv6=True):
1702
self.interface = interface
1703
if use_ipv6:
1704
self.address_family = socket.AF_INET6
1705
socketserver.TCPServer.__init__(self, server_address,
1706
RequestHandlerClass)
741
address_family = socket.AF_INET6
742
def __init__(self, *args, **kwargs):
743
if "settings" in kwargs:
744
self.settings = kwargs["settings"]
745
del kwargs["settings"]
746
if "clients" in kwargs:
747
self.clients = kwargs["clients"]
748
del kwargs["clients"]
749
self.enabled = False
750
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1707
751
def server_bind(self):
1708
752
"""This overrides the normal server_bind() function
1709
753
to bind to an interface if one was specified, and also NOT to
1710
754
bind to an address or port if they were not specified."""
1711
if self.interface is not None:
1712
if SO_BINDTODEVICE is None:
1713
logger.error("SO_BINDTODEVICE does not exist;"
1714
" cannot bind to interface %s",
1715
self.interface)
1716
else:
1717
try:
1718
self.socket.setsockopt(socket.SOL_SOCKET,
1719
SO_BINDTODEVICE,
1720
str(self.interface
1721
+ '\0'))
1722
except socket.error as error:
1723
if error[0] == errno.EPERM:
1724
logger.error("No permission to"
1725
" bind to interface %s",
1726
self.interface)
1727
elif error[0] == errno.ENOPROTOOPT:
1728
logger.error("SO_BINDTODEVICE not available;"
1729
" cannot bind to interface %s",
1730
self.interface)
1731
else:
1732
raise
755
if self.settings["interface"]:
756
# 25 is from /usr/include/asm-i486/socket.h
757
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
758
try:
759
self.socket.setsockopt(socket.SOL_SOCKET,
760
SO_BINDTODEVICE,
761
self.settings["interface"])
762
except socket.error, error:
763
if error[0] == errno.EPERM:
764
logger.error(u"No permission to"
765
u" bind to interface %s",
766
self.settings["interface"])
767
else:
768
raise
1733
769
# Only bind(2) the socket if we really need to.
1734
770
if self.server_address[0] or self.server_address[1]:
1735
771
if not self.server_address[0]:
1736
if self.address_family == socket.AF_INET6:
1737
any_address = "::" # in6addr_any
1738
else:
1739
any_address = socket.INADDR_ANY
1740
self.server_address = (any_address,
772
in6addr_any = "::"
773
self.server_address = (in6addr_any,
1741
774
self.server_address[1])
1742
775
elif not self.server_address[1]:
1743
776
self.server_address = (self.server_address[0],
1744
777
0)
1745
# if self.interface:
778
# if self.settings["interface"]:
1746
779
# self.server_address = (self.server_address[0],
1747
780
# 0, # port
1748
781
# 0, # flowinfo
1749
782
# if_nametoindex
1750
# (self.interface))
1751
return socketserver.TCPServer.server_bind(self)
1752
1753
1754
class MandosServer(IPv6_TCPServer):
1755
"""Mandos server.
1756
1757
Attributes:
1758
clients: set of Client objects
1759
gnutls_priority GnuTLS priority string
1760
use_dbus: Boolean; to emit D-Bus signals or not
1761
1762
Assumes a gobject.MainLoop event loop.
1763
"""
1764
def __init__(self, server_address, RequestHandlerClass,
1765
interface=None, use_ipv6=True, clients=None,
1766
gnutls_priority=None, use_dbus=True):
1767
self.enabled = False
1768
self.clients = clients
1769
if self.clients is None:
1770
self.clients = {}
1771
self.use_dbus = use_dbus
1772
self.gnutls_priority = gnutls_priority
1773
IPv6_TCPServer.__init__(self, server_address,
1774
RequestHandlerClass,
1775
interface = interface,
1776
use_ipv6 = use_ipv6)
783
# (self.settings
784
# ["interface"]))
785
return super(IPv6_TCPServer, self).server_bind()
1777
786
def server_activate(self):
1778
787
if self.enabled:
1779
return socketserver.TCPServer.server_activate(self)
1780
788
return super(IPv6_TCPServer, self).server_activate()
1781
789
def enable(self):
1782
790
self.enabled = True
1783
1784
def add_pipe(self, parent_pipe, proc):
1785
# Call "handle_ipc" for both data and EOF events
1786
gobject.io_add_watch(parent_pipe.fileno(),
1787
gobject.IO_IN | gobject.IO_HUP,
1788
functools.partial(self.handle_ipc,
1789
parent_pipe =
1790
parent_pipe,
1791
proc = proc))
1792
1793
def handle_ipc(self, source, condition, parent_pipe=None,
1794
proc = None, client_object=None):
1795
condition_names = {
1796
gobject.IO_IN: "IN", # There is data to read.
1797
gobject.IO_OUT: "OUT", # Data can be written (without
1798
# blocking).
1799
gobject.IO_PRI: "PRI", # There is urgent data to read.
1800
gobject.IO_ERR: "ERR", # Error condition.
1801
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1802
# broken, usually for pipes and
1803
# sockets).
1804
}
1805
conditions_string = ' | '.join(name
1806
for cond, name in
1807
condition_names.iteritems()
1808
if cond & condition)
1809
# error, or the other end of multiprocessing.Pipe has closed
1810
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1811
# Wait for other process to exit
1812
proc.join()
1813
return False
1814
1815
# Read a request from the child
1816
request = parent_pipe.recv()
1817
command = request[0]
1818
1819
if command == 'init':
1820
fpr = request[1]
1821
address = request[2]
1822
1823
for c in self.clients.itervalues():
1824
if c.fingerprint == fpr:
1825
client = c
1826
break
1827
else:
1828
logger.info("Client not found for fingerprint: %s, ad"
1829
"dress: %s", fpr, address)
1830
if self.use_dbus:
1831
# Emit D-Bus signal
1832
mandos_dbus_service.ClientNotFound(fpr,
1833
address[0])
1834
parent_pipe.send(False)
1835
return False
1836
1837
gobject.io_add_watch(parent_pipe.fileno(),
1838
gobject.IO_IN | gobject.IO_HUP,
1839
functools.partial(self.handle_ipc,
1840
parent_pipe =
1841
parent_pipe,
1842
proc = proc,
1843
client_object =
1844
client))
1845
parent_pipe.send(True)
1846
# remove the old hook in favor of the new above hook on
1847
# same fileno
1848
return False
1849
if command == 'funcall':
1850
funcname = request[1]
1851
args = request[2]
1852
kwargs = request[3]
1853
1854
parent_pipe.send(('data', getattr(client_object,
1855
funcname)(*args,
1856
**kwargs)))
1857
1858
if command == 'getattr':
1859
attrname = request[1]
1860
if callable(client_object.__getattribute__(attrname)):
1861
parent_pipe.send(('function',))
1862
else:
1863
parent_pipe.send(('data', client_object
1864
.__getattribute__(attrname)))
1865
1866
if command == 'setattr':
1867
attrname = request[1]
1868
value = request[2]
1869
setattr(client_object, attrname, value)
1870
1871
return True
1872
791
1873
792
1874
793
def string_to_delta(interval):
1882
801
datetime.timedelta(0, 3600)
1883
802
>>> string_to_delta('24h')
1884
803
datetime.timedelta(1)
1885
>>> string_to_delta('1w')
804
>>> string_to_delta(u'1w')
1886
805
datetime.timedelta(7)
1887
806
>>> string_to_delta('5m 30s')
1888
807
datetime.timedelta(0, 330)
1892
811
try:
1893
812
suffix = unicode(s[-1])
1894
813
value = int(s[:-1])
1895
if suffix == "d":
814
if suffix == u"d":
1896
815
delta = datetime.timedelta(value)
1897
elif suffix == "s":
816
elif suffix == u"s":
1898
817
delta = datetime.timedelta(0, value)
1899
elif suffix == "m":
818
elif suffix == u"m":
1900
819
delta = datetime.timedelta(0, 0, 0, 0, value)
1901
elif suffix == "h":
820
elif suffix == u"h":
1902
821
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1903
elif suffix == "w":
822
elif suffix == u"w":
1904
823
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1905
824
else:
1906
raise ValueError("Unknown suffix %r" % suffix)
1907
except (ValueError, IndexError) as e:
1908
raise ValueError(*(e.args))
825
raise ValueError
826
except (ValueError, IndexError):
827
raise ValueError
1909
828
timevalue += delta
1910
829
return timevalue
1911
830
1912
831
832
def server_state_changed(state):
833
"""Derived from the Avahi example code"""
834
if state == avahi.SERVER_COLLISION:
835
logger.error(u"Zeroconf server name collision")
836
service.remove()
837
elif state == avahi.SERVER_RUNNING:
838
service.add()
839
840
841
def entry_group_state_changed(state, error):
842
"""Derived from the Avahi example code"""
843
logger.debug(u"Avahi state change: %i", state)
844
845
if state == avahi.ENTRY_GROUP_ESTABLISHED:
846
logger.debug(u"Zeroconf service established.")
847
elif state == avahi.ENTRY_GROUP_COLLISION:
848
logger.warning(u"Zeroconf service name collision.")
849
service.rename()
850
elif state == avahi.ENTRY_GROUP_FAILURE:
851
logger.critical(u"Avahi: Error in group state changed %s",
852
unicode(error))
853
raise AvahiGroupError(u"State changed: %s" % unicode(error))
854
855
def if_nametoindex(interface):
856
"""Call the C function if_nametoindex(), or equivalent"""
857
global if_nametoindex
858
try:
859
if_nametoindex = (ctypes.cdll.LoadLibrary
860
(ctypes.util.find_library("c"))
861
.if_nametoindex)
862
except (OSError, AttributeError):
863
if "struct" not in sys.modules:
864
import struct
865
if "fcntl" not in sys.modules:
866
import fcntl
867
def if_nametoindex(interface):
868
"Get an interface index the hard way, i.e. using fcntl()"
869
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
870
with closing(socket.socket()) as s:
871
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
872
struct.pack("16s16x", interface))
873
interface_index = struct.unpack("I", ifreq[16:20])[0]
874
return interface_index
875
return if_nametoindex(interface)
876
877
1913
878
def daemon(nochdir = False, noclose = False):
1914
879
"""See daemon(3). Standard BSD Unix function.
1915
1916
880
This should really exist as os.daemon, but it doesn't (yet)."""
1917
881
if os.fork():
1918
882
sys.exit()
1926
890
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1927
891
if not stat.S_ISCHR(os.fstat(null).st_mode):
1928
892
raise OSError(errno.ENODEV,
1929
"%s not a character device"
1930
% os.path.devnull)
893
"/dev/null not a character device")
1931
894
os.dup2(null, sys.stdin.fileno())
1932
895
os.dup2(null, sys.stdout.fileno())
1933
896
os.dup2(null, sys.stderr.fileno())
1936
899
1937
900
1938
901
def main():
1939
1940
##################################################################
1941
# Parsing of options, both command line and config file
1942
1943
parser = argparse.ArgumentParser()
1944
parser.add_argument("-v", "--version", action="version",
1945
version = "%%(prog)s %s" % version,
1946
help="show version number and exit")
1947
parser.add_argument("-i", "--interface", metavar="IF",
1948
help="Bind to interface IF")
1949
parser.add_argument("-a", "--address",
1950
help="Address to listen for requests on")
1951
parser.add_argument("-p", "--port", type=int,
1952
help="Port number to receive requests on")
1953
parser.add_argument("--check", action="store_true",
1954
help="Run self-test")
1955
parser.add_argument("--debug", action="store_true",
1956
help="Debug mode; run in foreground and log"
1957
" to terminal")
1958
parser.add_argument("--debuglevel", metavar="LEVEL",
1959
help="Debug level for stdout output")
1960
parser.add_argument("--priority", help="GnuTLS"
1961
" priority string (see GnuTLS documentation)")
1962
parser.add_argument("--servicename",
1963
metavar="NAME", help="Zeroconf service name")
1964
parser.add_argument("--configdir",
1965
default="/etc/mandos", metavar="DIR",
1966
help="Directory to search for configuration"
1967
" files")
1968
parser.add_argument("--no-dbus", action="store_false",
1969
dest="use_dbus", help="Do not provide D-Bus"
1970
" system bus interface")
1971
parser.add_argument("--no-ipv6", action="store_false",
1972
dest="use_ipv6", help="Do not use IPv6")
1973
parser.add_argument("--no-restore", action="store_false",
1974
dest="restore", help="Do not restore stored"
1975
" state", default=True)
1976
1977
options = parser.parse_args()
902
parser = optparse.OptionParser(version = "%%prog %s" % version)
903
parser.add_option("-i", "--interface", type="string",
904
metavar="IF", help="Bind to interface IF")
905
parser.add_option("-a", "--address", type="string",
906
help="Address to listen for requests on")
907
parser.add_option("-p", "--port", type="int",
908
help="Port number to receive requests on")
909
parser.add_option("--check", action="store_true",
910
help="Run self-test")
911
parser.add_option("--debug", action="store_true",
912
help="Debug mode; run in foreground and log to"
913
" terminal")
914
parser.add_option("--priority", type="string", help="GnuTLS"
915
" priority string (see GnuTLS documentation)")
916
parser.add_option("--servicename", type="string", metavar="NAME",
917
help="Zeroconf service name")
918
parser.add_option("--configdir", type="string",
919
default="/etc/mandos", metavar="DIR",
920
help="Directory to search for configuration"
921
" files")
922
parser.add_option("--no-dbus", action="store_false",
923
dest="use_dbus",
924
help="Do not provide D-Bus system bus"
925
" interface")
926
options = parser.parse_args()[0]
1978
927
1979
928
if options.check:
1980
929
import doctest
1990
939
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1991
940
"servicename": "Mandos",
1992
941
"use_dbus": "True",
1993
"use_ipv6": "True",
1994
"debuglevel": "",
1995
942
}
1996
943
1997
944
# Parse config file for server-global settings
1998
server_config = configparser.SafeConfigParser(server_defaults)
945
server_config = ConfigParser.SafeConfigParser(server_defaults)
1999
946
del server_defaults
2000
server_config.read(os.path.join(options.configdir,
2001
"mandos.conf"))
947
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2002
948
# Convert the SafeConfigParser object to a dict
2003
949
server_settings = server_config.defaults()
2004
950
# Use the appropriate methods on the non-string config options
2005
for option in ("debug", "use_dbus", "use_ipv6"):
2006
server_settings[option] = server_config.getboolean("DEFAULT",
2007
option)
951
server_settings["debug"] = server_config.getboolean("DEFAULT",
952
"debug")
953
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
954
"use_dbus")
2008
955
if server_settings["port"]:
2009
956
server_settings["port"] = server_config.getint("DEFAULT",
2010
957
"port")
2014
961
# options, if set.
2015
962
for option in ("interface", "address", "port", "debug",
2016
963
"priority", "servicename", "configdir",
2017
"use_dbus", "use_ipv6", "debuglevel", "restore"):
964
"use_dbus"):
2018
965
value = getattr(options, option)
2019
966
if value is not None:
2020
967
server_settings[option] = value
2021
968
del options
2022
# Force all strings to be unicode
2023
for option in server_settings.keys():
2024
if type(server_settings[option]) is str:
2025
server_settings[option] = unicode(server_settings[option])
2026
969
# Now we have our good server settings in "server_settings"
2027
970
2028
##################################################################
2029
2030
971
# For convenience
2031
972
debug = server_settings["debug"]
2032
debuglevel = server_settings["debuglevel"]
2033
973
use_dbus = server_settings["use_dbus"]
2034
use_ipv6 = server_settings["use_ipv6"]
2035
974
2036
if debug:
2037
initlogger(logging.DEBUG)
2038
else:
2039
if not debuglevel:
2040
initlogger()
2041
else:
2042
level = getattr(logging, debuglevel.upper())
2043
initlogger(level)
975
if not debug:
976
syslogger.setLevel(logging.WARNING)
977
console.setLevel(logging.WARNING)
2044
978
2045
979
if server_settings["servicename"] != "Mandos":
2046
980
syslogger.setFormatter(logging.Formatter
2047
('Mandos (%s) [%%(process)d]:'
2048
' %%(levelname)s: %%(message)s'
981
('Mandos (%s): %%(levelname)s:'
982
' %%(message)s'
2049
983
% server_settings["servicename"]))
2050
984
2051
985
# Parse config file with clients
2052
client_defaults = { "timeout": "5m",
2053
"extended_timeout": "15m",
2054
"interval": "2m",
986
client_defaults = { "timeout": "1h",
987
"interval": "5m",
2055
988
"checker": "fping -q -- %%(host)s",
2056
989
"host": "",
2057
"approval_delay": "0s",
2058
"approval_duration": "1s",
2059
990
}
2060
client_config = configparser.SafeConfigParser(client_defaults)
991
client_config = ConfigParser.SafeConfigParser(client_defaults)
2061
992
client_config.read(os.path.join(server_settings["configdir"],
2062
993
"clients.conf"))
2063
994
2064
global mandos_dbus_service
2065
mandos_dbus_service = None
2066
2067
tcp_server = MandosServer((server_settings["address"],
2068
server_settings["port"]),
2069
ClientHandler,
2070
interface=(server_settings["interface"]
2071
or None),
2072
use_ipv6=use_ipv6,
2073
gnutls_priority=
2074
server_settings["priority"],
2075
use_dbus=use_dbus)
2076
if not debug:
2077
pidfilename = "/var/run/mandos.pid"
2078
try:
2079
pidfile = open(pidfilename, "w")
2080
except IOError:
2081
logger.error("Could not open file %r", pidfilename)
995
clients = Set()
996
tcp_server = IPv6_TCPServer((server_settings["address"],
997
server_settings["port"]),
998
TCP_handler,
999
settings=server_settings,
1000
clients=clients)
1001
pidfilename = "/var/run/mandos.pid"
1002
try:
1003
pidfile = open(pidfilename, "w")
1004
except IOError:
1005
logger.error("Could not open file %r", pidfilename)
2082
1006
2083
1007
try:
2084
1008
uid = pwd.getpwnam("_mandos").pw_uid
2090
1014
except KeyError:
2091
1015
try:
2092
1016
uid = pwd.getpwnam("nobody").pw_uid
2093
gid = pwd.getpwnam("nobody").pw_gid
1017
gid = pwd.getpwnam("nogroup").pw_gid
2094
1018
except KeyError:
2095
1019
uid = 65534
2096
1020
gid = 65534
2097
1021
try:
2098
1022
os.setgid(gid)
2099
1023
os.setuid(uid)
2100
except OSError as error:
1024
except OSError, error:
2101
1025
if error[0] != errno.EPERM:
2102
1026
raise error
2103
1027
1028
# Enable all possible GnuTLS debugging
2104
1029
if debug:
2105
# Enable all possible GnuTLS debugging
2106
2107
1030
# "Use a log level over 10 to enable all debugging options."
2108
1031
# - GnuTLS manual
2109
1032
gnutls.library.functions.gnutls_global_set_log_level(11)
2114
1037
2115
1038
(gnutls.library.functions
2116
1039
.gnutls_global_set_log_function(debug_gnutls))
2117
2118
# Redirect stdin so all checkers get /dev/null
2119
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2120
os.dup2(null, sys.stdin.fileno())
2121
if null > 2:
2122
os.close(null)
2123
else:
2124
# No console logging
2125
logger.removeHandler(console)
2126
1040
2127
# Need to fork before connecting to D-Bus
2128
if not debug:
2129
# Close all input and output, do double fork, etc.
2130
daemon()
1041
global service
1042
service = AvahiService(name = server_settings["servicename"],
1043
servicetype = "_mandos._tcp", )
1044
if server_settings["interface"]:
1045
service.interface = (if_nametoindex
1046
(server_settings["interface"]))
2131
1047
2132
1048
global main_loop
1049
global bus
1050
global server
2133
1051
# From the Avahi example code
2134
1052
DBusGMainLoop(set_as_default=True )
2135
1053
main_loop = gobject.MainLoop()
2136
1054
bus = dbus.SystemBus()
1055
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
avahi.DBUS_PATH_SERVER),
1057
avahi.DBUS_INTERFACE_SERVER)
2137
1058
# End of Avahi example code
2138
1059
if use_dbus:
2139
try:
2140
bus_name = dbus.service.BusName("se.recompile.Mandos",
2141
bus, do_not_queue=True)
2142
old_bus_name = (dbus.service.BusName
2143
("se.bsnet.fukt.Mandos", bus,
2144
do_not_queue=True))
2145
except dbus.exceptions.NameExistsException as e:
2146
logger.error(unicode(e) + ", disabling D-Bus")
2147
use_dbus = False
2148
server_settings["use_dbus"] = False
2149
tcp_server.use_dbus = False
2150
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2151
service = AvahiServiceToSyslog(name =
2152
server_settings["servicename"],
2153
servicetype = "_mandos._tcp",
2154
protocol = protocol, bus = bus)
2155
if server_settings["interface"]:
2156
service.interface = (if_nametoindex
2157
(str(server_settings["interface"])))
2158
2159
global multiprocessing_manager
2160
multiprocessing_manager = multiprocessing.Manager()
2161
2162
client_class = Client
2163
if use_dbus:
2164
client_class = functools.partial(ClientDBusTransitional,
2165
bus = bus)
2166
2167
special_settings = {
2168
# Some settings need to be accessd by special methods;
2169
# booleans need .getboolean(), etc. Here is a list of them:
2170
"approved_by_default":
2171
lambda section:
2172
client_config.getboolean(section, "approved_by_default"),
2173
}
2174
# Construct a new dict of client settings of this form:
2175
# { client_name: {setting_name: value, ...}, ...}
2176
# with exceptions for any special settings as defined above
2177
client_settings = dict((clientname,
2178
dict((setting,
2179
(value
2180
if setting not in special_settings
2181
else special_settings[setting]
2182
(clientname)))
2183
for setting, value in
2184
client_config.items(clientname)))
2185
for clientname in client_config.sections())
2186
2187
old_client_settings = {}
2188
clients_data = []
2189
2190
# Get client data and settings from last running state.
2191
if server_settings["restore"]:
2192
try:
2193
with open(stored_state_path, "rb") as stored_state:
2194
clients_data, old_client_settings = (pickle.load
2195
(stored_state))
2196
os.remove(stored_state_path)
2197
except IOError as e:
2198
logger.warning("Could not load persistent state: {0}"
2199
.format(e))
2200
if e.errno != errno.ENOENT:
2201
raise
2202
2203
with Crypto() as crypt:
2204
for client in clients_data:
2205
client_name = client["name"]
2206
2207
# Decide which value to use after restoring saved state.
2208
# We have three different values: Old config file,
2209
# new config file, and saved state.
2210
# New config value takes precedence if it differs from old
2211
# config value, otherwise use saved state.
2212
for name, value in client_settings[client_name].items():
2213
try:
2214
# For each value in new config, check if it
2215
# differs from the old config value (Except for
2216
# the "secret" attribute)
2217
if (name != "secret" and
2218
value != old_client_settings[client_name]
2219
[name]):
2220
setattr(client, name, value)
2221
except KeyError:
2222
pass
2223
2224
# Clients who has passed its expire date can still be
2225
# enabled if its last checker was sucessful. Clients
2226
# whose checker failed before we stored its state is
2227
# assumed to have failed all checkers during downtime.
2228
if client["enabled"] and client["last_checked_ok"]:
2229
if ((datetime.datetime.utcnow()
2230
- client["last_checked_ok"])
2231
> client["interval"]):
2232
if client["last_checker_status"] != 0:
2233
client["enabled"] = False
2234
else:
2235
client["expires"] = (datetime.datetime
2236
.utcnow()
2237
+ client["timeout"])
2238
2239
client["changedstate"] = (multiprocessing_manager
2240
.Condition
2241
(multiprocessing_manager
2242
.Lock()))
2243
if use_dbus:
2244
new_client = (ClientDBusTransitional.__new__
2245
(ClientDBusTransitional))
2246
tcp_server.clients[client_name] = new_client
2247
new_client.bus = bus
2248
for name, value in client.iteritems():
2249
setattr(new_client, name, value)
2250
client_object_name = unicode(client_name).translate(
2251
{ord("."): ord("_"),
2252
ord("-"): ord("_")})
2253
new_client.dbus_object_path = (dbus.ObjectPath
2254
("/clients/"
2255
+ client_object_name))
2256
DBusObjectWithProperties.__init__(new_client,
2257
new_client.bus,
2258
new_client
2259
.dbus_object_path)
2260
else:
2261
tcp_server.clients[client_name] = (Client.__new__
2262
(Client))
2263
for name, value in client.iteritems():
2264
setattr(tcp_server.clients[client_name],
2265
name, value)
2266
2267
try:
2268
tcp_server.clients[client_name].secret = (
2269
crypt.decrypt(tcp_server.clients[client_name]
2270
.encrypted_secret,
2271
client_settings[client_name]
2272
["secret"]))
2273
except CryptoError:
2274
# If decryption fails, we use secret from new settings
2275
tcp_server.clients[client_name].secret = (
2276
client_settings[client_name]["secret"])
2277
2278
# Create/remove clients based on new changes made to config
2279
for clientname in set(old_client_settings) - set(client_settings):
2280
del tcp_server.clients[clientname]
2281
for clientname in set(client_settings) - set(old_client_settings):
2282
tcp_server.clients[clientname] = (client_class(name
2283
= clientname,
2284
config =
2285
client_settings
2286
[clientname]))
2287
2288
if not tcp_server.clients:
2289
logger.warning("No clients defined")
1060
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1061
1062
clients.update(Set(Client(name = section,
1063
config
1064
= dict(client_config.items(section)),
1065
use_dbus = use_dbus)
1066
for section in client_config.sections()))
1067
if not clients:
1068
logger.warning(u"No clients defined")
1069
1070
if debug:
1071
# Redirect stdin so all checkers get /dev/null
1072
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1073
os.dup2(null, sys.stdin.fileno())
1074
if null > 2:
1075
os.close(null)
1076
else:
1077
# No console logging
1078
logger.removeHandler(console)
1079
# Close all input and output, do double fork, etc.
1080
daemon()
1081
1082
try:
1083
pid = os.getpid()
1084
pidfile.write(str(pid) + "\n")
1085
pidfile.close()
1086
del pidfile
1087
except IOError:
1088
logger.error(u"Could not write to file %r with PID %d",
1089
pidfilename, pid)
1090
except NameError:
1091
# "pidfile" was never created
1092
pass
1093
del pidfilename
1094
1095
def cleanup():
1096
"Cleanup function; run on exit"
1097
global group
1098
# From the Avahi example code
1099
if not group is None:
1100
group.Free()
1101
group = None
1102
# End of Avahi example code
2290
1103
1104
while clients:
1105
client = clients.pop()
1106
client.disable_hook = None
1107
client.disable()
1108
1109
atexit.register(cleanup)
1110
2291
1111
if not debug:
2292
try:
2293
with pidfile:
2294
pid = os.getpid()
2295
pidfile.write(str(pid) + "\n".encode("utf-8"))
2296
del pidfile
2297
except IOError:
2298
logger.error("Could not write to file %r with PID %d",
2299
pidfilename, pid)
2300
except NameError:
2301
# "pidfile" was never created
2302
pass
2303
del pidfilename
2304
2305
1112
signal.signal(signal.SIGINT, signal.SIG_IGN)
2306
2307
1113
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2308
1114
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2309
1115
2310
1116
if use_dbus:
2311
class MandosDBusService(dbus.service.Object):
1117
class MandosServer(dbus.service.Object):
2312
1118
"""A D-Bus proxy object"""
2313
1119
def __init__(self):
2314
1120
dbus.service.Object.__init__(self, bus, "/")
2315
_interface = "se.recompile.Mandos"
2316
2317
@dbus.service.signal(_interface, signature="o")
2318
def ClientAdded(self, objpath):
2319
"D-Bus signal"
2320
pass
2321
2322
@dbus.service.signal(_interface, signature="ss")
2323
def ClientNotFound(self, fingerprint, address):
1121
_interface = u"se.bsnet.fukt.Mandos"
1122
1123
@dbus.service.signal(_interface, signature="oa{sv}")
1124
def ClientAdded(self, objpath, properties):
2324
1125
"D-Bus signal"
2325
1126
pass
2326
1127
2332
1133
@dbus.service.method(_interface, out_signature="ao")
2333
1134
def GetAllClients(self):
2334
1135
"D-Bus method"
2335
return dbus.Array(c.dbus_object_path
2336
for c in
2337
tcp_server.clients.itervalues())
1136
return dbus.Array(c.dbus_object_path for c in clients)
2338
1137
2339
@dbus.service.method(_interface,
2340
out_signature="a{oa{sv}}")
1138
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2341
1139
def GetAllClientsWithProperties(self):
2342
1140
"D-Bus method"
2343
1141
return dbus.Dictionary(
2344
((c.dbus_object_path, c.GetAll(""))
2345
for c in tcp_server.clients.itervalues()),
1142
((c.dbus_object_path, c.GetAllProperties())
1143
for c in clients),
2346
1144
signature="oa{sv}")
2347
1145
2348
1146
@dbus.service.method(_interface, in_signature="o")
2349
1147
def RemoveClient(self, object_path):
2350
1148
"D-Bus method"
2351
for c in tcp_server.clients.itervalues():
1149
for c in clients:
2352
1150
if c.dbus_object_path == object_path:
2353
del tcp_server.clients[c.name]
2354
c.remove_from_connection()
1151
clients.remove(c)
2355
1152
# Don't signal anything except ClientRemoved
2356
c.disable(quiet=True)
1153
c.use_dbus = False
1154
c.disable()
2357
1155
# Emit D-Bus signal
2358
1156
self.ClientRemoved(object_path, c.name)
2359
1157
return
2360
raise KeyError(object_path)
1158
raise KeyError
2361
1159
2362
1160
del _interface
2363
1161
2364
class MandosDBusServiceTransitional(MandosDBusService):
2365
__metaclass__ = AlternateDBusNamesMetaclass
2366
mandos_dbus_service = MandosDBusServiceTransitional()
2367
2368
def cleanup():
2369
"Cleanup function; run on exit"
2370
service.cleanup()
2371
2372
multiprocessing.active_children()
2373
if not (tcp_server.clients or client_settings):
2374
return
2375
2376
# Store client before exiting. Secrets are encrypted with key
2377
# based on what config file has. If config file is
2378
# removed/edited, old secret will thus be unrecovable.
2379
clients = []
2380
with Crypto() as crypt:
2381
for client in tcp_server.clients.itervalues():
2382
key = client_settings[client.name]["secret"]
2383
client.encrypted_secret = crypt.encrypt(client.secret,
2384
key)
2385
client_dict = {}
2386
2387
# A list of attributes that will not be stored when
2388
# shutting down.
2389
exclude = set(("bus", "changedstate", "secret"))
2390
for name, typ in (inspect.getmembers
2391
(dbus.service.Object)):
2392
exclude.add(name)
2393
2394
client_dict["encrypted_secret"] = (client
2395
.encrypted_secret)
2396
for attr in client.client_structure:
2397
if attr not in exclude:
2398
client_dict[attr] = getattr(client, attr)
2399
2400
clients.append(client_dict)
2401
del client_settings[client.name]["secret"]
2402
2403
try:
2404
with os.fdopen(os.open(stored_state_path,
2405
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2406
0600), "wb") as stored_state:
2407
pickle.dump((clients, client_settings), stored_state)
2408
except (IOError, OSError) as e:
2409
logger.warning("Could not save persistent state: {0}"
2410
.format(e))
2411
if e.errno not in (errno.ENOENT, errno.EACCES):
2412
raise
2413
2414
# Delete all clients, and settings from config
2415
while tcp_server.clients:
2416
name, client = tcp_server.clients.popitem()
2417
if use_dbus:
2418
client.remove_from_connection()
2419
# Don't signal anything except ClientRemoved
2420
client.disable(quiet=True)
2421
if use_dbus:
2422
# Emit D-Bus signal
2423
mandos_dbus_service.ClientRemoved(client
2424
.dbus_object_path,
2425
client.name)
2426
client_settings.clear()
2427
2428
atexit.register(cleanup)
2429
2430
for client in tcp_server.clients.itervalues():
1162
mandos_server = MandosServer()
1163
1164
for client in clients:
2431
1165
if use_dbus:
2432
1166
# Emit D-Bus signal
2433
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2434
# Need to initiate checking of clients
2435
if client.enabled:
2436
client.init_checker()
1167
mandos_server.ClientAdded(client.dbus_object_path,
1168
client.GetAllProperties())
1169
client.enable()
2437
1170
2438
1171
tcp_server.enable()
2439
1172
tcp_server.server_activate()
2440
1173
2441
1174
# Find out what port we got
2442
1175
service.port = tcp_server.socket.getsockname()[1]
2443
if use_ipv6:
2444
logger.info("Now listening on address %r, port %d,"
2445
" flowinfo %d, scope_id %d"
2446
% tcp_server.socket.getsockname())
2447
else: # IPv4
2448
logger.info("Now listening on address %r, port %d"
2449
% tcp_server.socket.getsockname())
1176
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1177
u" scope_id %d" % tcp_server.socket.getsockname())
2450
1178
2451
1179
#service.interface = tcp_server.socket.getsockname()[3]
2452
1180
2453
1181
try:
2454
1182
# From the Avahi example code
1183
server.connect_to_signal("StateChanged", server_state_changed)
2455
1184
try:
2456
service.activate()
2457
except dbus.exceptions.DBusException as error:
2458
logger.critical("DBusException: %s", error)
2459
cleanup()
1185
server_state_changed(server.GetState())
1186
except dbus.exceptions.DBusException, error:
1187
logger.critical(u"DBusException: %s", error)
2460
1188
sys.exit(1)
2461
1189
# End of Avahi example code
2462
1190
2465
1193
(tcp_server.handle_request
2466
1194
(*args[2:], **kwargs) or True))
2467
1195
2468
logger.debug("Starting main loop")
1196
logger.debug(u"Starting main loop")
2469
1197
main_loop.run()
2470
except AvahiError as error:
2471
logger.critical("AvahiError: %s", error)
2472
cleanup()
1198
except AvahiError, error:
1199
logger.critical(u"AvahiError: %s", error)
2473
1200
sys.exit(1)
2474
1201
except KeyboardInterrupt:
2475
1202
if debug:
2476
print("", file=sys.stderr)
1203
print >> sys.stderr
2477
1204
logger.debug("Server received KeyboardInterrupt")
2478
1205
logger.debug("Server exiting")
2479
# Must run before the D-Bus bus name gets deregistered
2480
cleanup()
2481
2482
1206
2483
1207
if __name__ == '__main__':
2484
1208
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0