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- Committer: Teddy Hogeborn
- Date: 2008-07-22 06:23:29 UTC
- Revision ID: teddy@fukt.bsnet.se-20080722062329-jaex5y5mslf6sqjx
* mandos-clients.conf ([DEFAULT]): New section.
* plugins.d/mandosclient.c (start_mandos_communication): Only print if
debugging.
Print server
name.
Bug fix: Loop
until suc-
cess.
* server.py (serverName): Set via option, not globally.
(Client.__init__): Removed argument "options". Require "timeout"
and "interval" arguments.
(tcp_handler.handle): Set "priority" from self.server.options.
(main): Removed "--timeout" and "--interval" options. New options
"--priority" and "--servicename". Add defaults for
"timeout" and "interval". Set "serviceName" from options.
Do not pass "options" to "Client()".
* plugins.d/mandosclient.c (start_mandos_communication): Only print if
debugging.
Print server
name.
Bug fix: Loop
until suc-
cess.
* server.py (serverName): Set via option, not globally.
(Client.__init__): Removed argument "options". Require "timeout"
and "interval" arguments.
(tcp_handler.handle): Set "priority" from self.server.options.
(main): Removed "--timeout" and "--interval" options. New options
"--priority" and "--servicename". Add defaults for
"timeout" and "interval". Set "serviceName" from options.
Do not pass "options" to "Client()".
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
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
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
import SocketServer as socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
31
#
32
33
from __future__ import division
34
35
import SocketServer
38
36
import socket
39
import argparse
37
import select
38
from optparse import OptionParser
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
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
68
58
69
59
import dbus
70
import dbus.service
71
60
import gobject
72
61
import avahi
73
62
from dbus.mainloop.glib import DBusGMainLoop
74
63
import ctypes
75
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
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
127
logger.setLevel(level)
128
129
130
class PGPError(Exception):
131
"""Exception if encryption/decryption fails"""
132
pass
133
134
135
class PGPEngine(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 PGPError(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 PGPError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
209
210
class AvahiError(Exception):
211
def __init__(self, value, *args, **kwargs):
212
self.value = value
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
216
217
class AvahiServiceError(AvahiError):
218
pass
219
220
class AvahiGroupError(AvahiError):
221
pass
222
223
224
class AvahiService(object):
225
"""An Avahi (Zeroconf) service.
226
227
Attributes:
228
interface: integer; avahi.IF_UNSPEC or an interface index.
229
Used to optionally bind to the specified interface.
230
name: string; Example: 'Mandos'
231
type: string; Example: '_mandos._tcp'.
232
See <http://www.dns-sd.org/ServiceTypes.html>
233
port: integer; what port to announce
234
TXT: list of strings; TXT record for the service
235
domain: string; Domain to publish on, default to .local if empty.
236
host: string; Host to publish records for, default is localhost
237
max_renames: integer; maximum number of renames
238
rename_count: integer; counter so we only rename after collisions
239
a sensible number of times
240
group: D-Bus Entry Group
241
server: D-Bus Server
242
bus: dbus.SystemBus()
243
"""
244
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
245
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
247
protocol = avahi.PROTO_UNSPEC, bus = None):
248
self.interface = interface
249
self.name = name
250
self.type = servicetype
251
self.port = port
252
self.TXT = TXT if TXT is not None else []
253
self.domain = domain
254
self.host = host
255
self.rename_count = 0
256
self.max_renames = max_renames
257
self.protocol = protocol
258
self.group = None # our entry group
259
self.server = None
260
self.bus = bus
261
self.entry_group_state_changed_match = None
262
def rename(self):
263
"""Derived from the Avahi example code"""
264
if self.rename_count >= self.max_renames:
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
267
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)
273
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)
280
self.rename_count += 1
281
def remove(self):
282
"""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()
288
def add(self):
289
"""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
64
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
75
76
77
logger = logging.Logger('mandos')
78
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
82
logger.addHandler(syslogger)
83
del syslogger
84
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
89
# From the Avahi example code:
90
serviceName = None
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
99
# End of Avahi example code
100
101
386
102
class Client(object):
387
103
"""A representation of a client host served by this server.
388
389
104
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
393
checker: subprocess.Popen(); a running checker process used
394
to see if the client lives.
395
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
105
name: string; from the config file, used in log messages
106
fingerprint: string (40 or 32 hexadecimal digits); used to
107
uniquely identify the client
108
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
114
interval: datetime.timedelta(); How often to start a new checker
115
stop_hook: If set, called by stop() as stop_hook(self)
116
checker: subprocess.Popen(); a running checker process used
117
to see if the client lives.
118
Is None if no process is running.
119
checker_initiator_tag: a gobject event source tag, or None
120
stop_initiator_tag: - '' -
121
checker_callback_tag: - '' -
122
checker_command: string; External command which is run to check if
123
client lives. %()s expansions are done at
399
124
runtime with vars(self) as dict, so that for
400
125
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) or None
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
126
Private attibutes:
127
_timeout: Real variable for 'timeout'
128
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
130
_interval_milliseconds: - '' -
428
131
"""
429
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
436
"interval": "2m",
437
"checker": "fping -q -- %%(host)s",
438
"host": "",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
441
"approved_by_default": "True",
442
"enabled": "True",
443
}
444
445
def timeout_milliseconds(self):
446
"Return the 'timeout' attribute in milliseconds"
447
return timedelta_to_milliseconds(self.timeout)
448
449
def extended_timeout_milliseconds(self):
450
"Return the 'extended_timeout' attribute in milliseconds"
451
return timedelta_to_milliseconds(self.extended_timeout)
452
453
def interval_milliseconds(self):
454
"Return the 'interval' attribute in milliseconds"
455
return timedelta_to_milliseconds(self.interval)
456
457
def approval_delay_milliseconds(self):
458
return timedelta_to_milliseconds(self.approval_delay)
459
460
@staticmethod
461
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
463
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
465
settings = {}
466
for client_name in config.sections():
467
section = dict(config.items(client_name))
468
client = settings[client_name] = {}
469
470
# Default copying each value from config to new dict
471
for setting, value in section.iteritems():
472
client[setting] = value
473
474
# Reformat values from string types to Python types
475
client["approved_by_default"] = config.getboolean(
476
client_name, "approved_by_default")
477
client["enabled"] = config.getboolean(client_name, "enabled")
478
479
client["fingerprint"] = (section["fingerprint"].upper()
480
.replace(" ", ""))
481
if "secret" in section:
482
client["secret"] = section["secret"].decode("base64")
483
elif "secfile" in section:
484
with open(os.path.expanduser(os.path.expandvars
485
(section["secfile"])),
486
"rb") as secfile:
487
client["secret"] = secfile.read()
488
else:
489
raise TypeError("No secret or secfile for section %s"
490
% section)
491
client["timeout"] = string_to_delta(section["timeout"])
492
client["extended_timeout"] = string_to_delta(
493
section["extended_timeout"])
494
client["interval"] = string_to_delta(section["interval"])
495
client["approval_delay"] = string_to_delta(
496
section["approval_delay"])
497
client["approval_duration"] = string_to_delta(
498
section["approval_duration"])
499
500
return settings
501
502
503
def __init__(self, config, name = None):
504
"""Note: the 'checker' key in 'config' sets the
505
'checker_command' attribute and *not* the 'checker'
506
attribute."""
132
def _set_timeout(self, timeout):
133
"Setter function for 'timeout' attribute"
134
self._timeout = timeout
135
self._timeout_milliseconds = ((self.timeout.days
136
* 24 * 60 * 60 * 1000)
137
+ (self.timeout.seconds * 1000)
138
+ (self.timeout.microseconds
139
// 1000))
140
timeout = property(lambda self: self._timeout,
141
_set_timeout)
142
del _set_timeout
143
def _set_interval(self, interval):
144
"Setter function for 'interval' attribute"
145
self._interval = interval
146
self._interval_milliseconds = ((self.interval.days
147
* 24 * 60 * 60 * 1000)
148
+ (self.interval.seconds
149
* 1000)
150
+ (self.interval.microseconds
151
// 1000))
152
interval = property(lambda self: self._interval,
153
_set_interval)
154
del _set_interval
155
def __init__(self, name=None, stop_hook=None, fingerprint=None,
156
secret=None, secfile=None, fqdn=None, timeout=None,
157
interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
507
160
self.name = name
508
logger.debug("Creating client %r", self.name)
509
# Uppercase and remove spaces from fingerprint for later
510
# comparison purposes with return value from the fingerprint()
511
# function
512
self.fingerprint = config["fingerprint"]
513
logger.debug(" Fingerprint: %s", self.fingerprint)
514
self.secret = config["secret"]
515
self.host = config["host"]
516
self.created = datetime.datetime.utcnow()
517
self.enabled = config["enabled"]
518
self.last_approval_request = None
519
if self.enabled:
520
self.last_enabled = datetime.datetime.utcnow()
161
logger.debug(u"Creating client %r", self.name)
162
# Uppercase and remove spaces from fingerprint
163
# for later comparison purposes with return value of
164
# the fingerprint() function
165
self.fingerprint = fingerprint.upper().replace(u" ", u"")
166
logger.debug(u" Fingerprint: %s", self.fingerprint)
167
if secret:
168
self.secret = secret.decode(u"base64")
169
elif secfile:
170
sf = open(secfile)
171
self.secret = sf.read()
172
sf.close()
521
173
else:
522
self.last_enabled = None
523
self.last_checked_ok = None
524
self.last_checker_status = None
525
self.timeout = config["timeout"]
526
self.extended_timeout = config["extended_timeout"]
527
self.interval = config["interval"]
174
raise RuntimeError(u"No secret or secfile for client %s"
175
% self.name)
176
self.fqdn = fqdn # string
177
self.created = datetime.datetime.now()
178
self.last_seen = None
179
self.timeout = string_to_delta(timeout)
180
self.interval = string_to_delta(interval)
181
self.stop_hook = stop_hook
528
182
self.checker = None
529
183
self.checker_initiator_tag = None
530
self.disable_initiator_tag = None
531
if self.enabled:
532
self.expires = datetime.datetime.utcnow() + self.timeout
533
else:
534
self.expires = None
184
self.stop_initiator_tag = None
535
185
self.checker_callback_tag = None
536
self.checker_command = config["checker"]
537
self.current_checker_command = None
538
self.approved = None
539
self.approved_by_default = config["approved_by_default"]
540
self.approvals_pending = 0
541
self.approval_delay = config["approval_delay"]
542
self.approval_duration = config["approval_duration"]
543
self.changedstate = (multiprocessing_manager
544
.Condition(multiprocessing_manager
545
.Lock()))
546
self.client_structure = [attr for attr in
547
self.__dict__.iterkeys()
548
if not attr.startswith("_")]
549
self.client_structure.append("client_structure")
550
551
for name, t in inspect.getmembers(type(self),
552
lambda obj:
553
isinstance(obj,
554
property)):
555
if not name.startswith("_"):
556
self.client_structure.append(name)
557
558
# Send notice to process children that client state has changed
559
def send_changedstate(self):
560
with self.changedstate:
561
self.changedstate.notify_all()
562
563
def enable(self):
186
self.check_command = checker
187
def start(self):
564
188
"""Start this client's checker and timeout hooks"""
565
if getattr(self, "enabled", False):
566
# Already enabled
567
return
568
self.send_changedstate()
569
self.expires = datetime.datetime.utcnow() + self.timeout
570
self.enabled = True
571
self.last_enabled = datetime.datetime.utcnow()
572
self.init_checker()
573
574
def disable(self, quiet=True):
575
"""Disable this client."""
576
if not getattr(self, "enabled", False):
577
return False
578
if not quiet:
579
self.send_changedstate()
580
if not quiet:
581
logger.info("Disabling client %s", self.name)
582
if getattr(self, "disable_initiator_tag", False):
583
gobject.source_remove(self.disable_initiator_tag)
584
self.disable_initiator_tag = None
585
self.expires = None
586
if getattr(self, "checker_initiator_tag", False):
587
gobject.source_remove(self.checker_initiator_tag)
588
self.checker_initiator_tag = None
589
self.stop_checker()
590
self.enabled = False
591
# Do not run this again if called by a gobject.timeout_add
592
return False
593
594
def __del__(self):
595
self.disable()
596
597
def init_checker(self):
598
189
# Schedule a new checker to be started an 'interval' from now,
599
190
# and every interval from then on.
600
self.checker_initiator_tag = (gobject.timeout_add
601
(self.interval_milliseconds(),
602
self.start_checker))
603
# Schedule a disable() when 'timeout' has passed
604
self.disable_initiator_tag = (gobject.timeout_add
605
(self.timeout_milliseconds(),
606
self.disable))
191
self.checker_initiator_tag = gobject.timeout_add\
192
(self._interval_milliseconds,
193
self.start_checker)
607
194
# Also start a new checker *right now*.
608
195
self.start_checker()
609
610
def checker_callback(self, pid, condition, command):
196
# Schedule a stop() when 'timeout' has passed
197
self.stop_initiator_tag = gobject.timeout_add\
198
(self._timeout_milliseconds,
199
self.stop)
200
def stop(self):
201
"""Stop this client.
202
The possibility that this client might be restarted is left
203
open, but not currently used."""
204
# If this client doesn't have a secret, it is already stopped.
205
if self.secret:
206
logger.debug(u"Stopping client %s", self.name)
207
self.secret = None
208
else:
209
return False
210
if hasattr(self, "stop_initiator_tag") \
211
and self.stop_initiator_tag:
212
gobject.source_remove(self.stop_initiator_tag)
213
self.stop_initiator_tag = None
214
if hasattr(self, "checker_initiator_tag") \
215
and self.checker_initiator_tag:
216
gobject.source_remove(self.checker_initiator_tag)
217
self.checker_initiator_tag = None
218
self.stop_checker()
219
if self.stop_hook:
220
self.stop_hook(self)
221
# Do not run this again if called by a gobject.timeout_add
222
return False
223
def __del__(self):
224
self.stop_hook = None
225
self.stop()
226
def checker_callback(self, pid, condition):
611
227
"""The checker has completed, so take appropriate actions."""
228
now = datetime.datetime.now()
612
229
self.checker_callback_tag = None
613
230
self.checker = None
614
if os.WIFEXITED(condition):
615
self.last_checker_status = os.WEXITSTATUS(condition)
616
if self.last_checker_status == 0:
617
logger.info("Checker for %(name)s succeeded",
618
vars(self))
619
self.checked_ok()
620
else:
621
logger.info("Checker for %(name)s failed",
622
vars(self))
623
else:
624
self.last_checker_status = -1
625
logger.warning("Checker for %(name)s crashed?",
231
if os.WIFEXITED(condition) \
232
and (os.WEXITSTATUS(condition) == 0):
233
logger.debug(u"Checker for %(name)s succeeded",
234
vars(self))
235
self.last_seen = now
236
gobject.source_remove(self.stop_initiator_tag)
237
self.stop_initiator_tag = gobject.timeout_add\
238
(self._timeout_milliseconds,
239
self.stop)
240
elif not os.WIFEXITED(condition):
241
logger.warning(u"Checker for %(name)s crashed?",
626
242
vars(self))
627
628
def checked_ok(self, timeout=None):
629
"""Bump up the timeout for this client.
630
631
This should only be called when the client has been seen,
632
alive and well.
633
"""
634
if timeout is None:
635
timeout = self.timeout
636
self.last_checked_ok = datetime.datetime.utcnow()
637
if self.disable_initiator_tag is not None:
638
gobject.source_remove(self.disable_initiator_tag)
639
if getattr(self, "enabled", False):
640
self.disable_initiator_tag = (gobject.timeout_add
641
(timedelta_to_milliseconds
642
(timeout), self.disable))
643
self.expires = datetime.datetime.utcnow() + timeout
644
645
def need_approval(self):
646
self.last_approval_request = datetime.datetime.utcnow()
647
243
else:
244
logger.debug(u"Checker for %(name)s failed",
245
vars(self))
648
246
def start_checker(self):
649
247
"""Start a new checker subprocess if one is not running.
650
651
248
If a checker already exists, leave it running and do
652
249
nothing."""
653
250
# The reason for not killing a running checker is that if we
656
253
# client would inevitably timeout, since no checker would get
657
254
# a chance to run to completion. If we instead leave running
658
255
# checkers alone, the checker would have to take more time
659
# than 'timeout' for the client to be disabled, which is as it
660
# should be.
661
662
# If a checker exists, make sure it is not a zombie
663
try:
664
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
665
except (AttributeError, OSError) as error:
666
if (isinstance(error, OSError)
667
and error.errno != errno.ECHILD):
668
raise error
669
else:
670
if pid:
671
logger.warning("Checker was a zombie")
672
gobject.source_remove(self.checker_callback_tag)
673
self.checker_callback(pid, status,
674
self.current_checker_command)
675
# Start a new checker if needed
256
# than 'timeout' for the client to be declared invalid, which
257
# is as it should be.
676
258
if self.checker is None:
677
259
try:
678
# In case checker_command has exactly one % operator
679
command = self.checker_command % self.host
260
command = self.check_command % self.fqdn
680
261
except TypeError:
681
# Escape attributes for the shell
682
escaped_attrs = dict(
683
(attr,
684
re.escape(unicode(str(getattr(self, attr, "")),
685
errors=
686
'replace')))
687
for attr in
688
self.runtime_expansions)
689
262
escaped_attrs = dict((key, re.escape(str(val)))
263
for key, val in
264
vars(self).iteritems())
690
265
try:
691
command = self.checker_command % escaped_attrs
692
except TypeError as error:
693
logger.error('Could not format string "%s":'
694
' %s', self.checker_command, error)
266
command = self.check_command % escaped_attrs
267
except TypeError, error:
268
logger.critical(u'Could not format string "%s":'
269
u' %s', self.check_command, error)
695
270
return True # Try again later
696
self.current_checker_command = command
697
271
try:
698
logger.info("Starting checker %r for %s",
699
command, self.name)
700
# We don't need to redirect stdout and stderr, since
701
# in normal mode, that is already done by daemon(),
702
# and in debug mode we don't want to. (Stdin is
703
# always replaced by /dev/null.)
704
self.checker = subprocess.Popen(command,
705
close_fds=True,
706
shell=True, cwd="/")
707
self.checker_callback_tag = (gobject.child_watch_add
708
(self.checker.pid,
709
self.checker_callback,
710
data=command))
711
# The checker may have completed before the gobject
712
# watch was added. Check for this.
713
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
714
if pid:
715
gobject.source_remove(self.checker_callback_tag)
716
self.checker_callback(pid, status, command)
717
except OSError as error:
718
logger.error("Failed to start subprocess: %s",
272
logger.debug(u"Starting checker %r for %s",
273
command, self.name)
274
self.checker = subprocess.\
275
Popen(command,
276
close_fds=True, shell=True,
277
cwd="/")
278
self.checker_callback_tag = gobject.child_watch_add\
279
(self.checker.pid,
280
self.checker_callback)
281
except subprocess.OSError, error:
282
logger.error(u"Failed to start subprocess: %s",
719
283
error)
720
284
# Re-run this periodically if run by gobject.timeout_add
721
285
return True
722
723
286
def stop_checker(self):
724
287
"""Force the checker process, if any, to stop."""
725
288
if self.checker_callback_tag:
726
289
gobject.source_remove(self.checker_callback_tag)
727
290
self.checker_callback_tag = None
728
if getattr(self, "checker", None) is None:
291
if not hasattr(self, "checker") or self.checker is None:
729
292
return
730
293
logger.debug("Stopping checker for %(name)s", vars(self))
731
294
try:
732
295
os.kill(self.checker.pid, signal.SIGTERM)
733
#time.sleep(0.5)
296
#os.sleep(0.5)
734
297
#if self.checker.poll() is None:
735
298
# os.kill(self.checker.pid, signal.SIGKILL)
736
except OSError as error:
737
if error.errno != errno.ESRCH: # No such process
299
except OSError, error:
300
if error.errno != errno.ESRCH:
738
301
raise
739
302
self.checker = None
740
741
742
def dbus_service_property(dbus_interface, signature="v",
743
access="readwrite", byte_arrays=False):
744
"""Decorators for marking methods of a DBusObjectWithProperties to
745
become properties on the D-Bus.
746
747
The decorated method will be called with no arguments by "Get"
748
and with one argument by "Set".
749
750
The parameters, where they are supported, are the same as
751
dbus.service.method, except there is only "signature", since the
752
type from Get() and the type sent to Set() is the same.
753
"""
754
# Encoding deeply encoded byte arrays is not supported yet by the
755
# "Set" method, so we fail early here:
756
if byte_arrays and signature != "ay":
757
raise ValueError("Byte arrays not supported for non-'ay'"
758
" signature %r" % signature)
759
def decorator(func):
760
func._dbus_is_property = True
761
func._dbus_interface = dbus_interface
762
func._dbus_signature = signature
763
func._dbus_access = access
764
func._dbus_name = func.__name__
765
if func._dbus_name.endswith("_dbus_property"):
766
func._dbus_name = func._dbus_name[:-14]
767
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
768
return func
769
return decorator
770
771
772
class DBusPropertyException(dbus.exceptions.DBusException):
773
"""A base class for D-Bus property-related exceptions
774
"""
775
def __unicode__(self):
776
return unicode(str(self))
777
778
779
class DBusPropertyAccessException(DBusPropertyException):
780
"""A property's access permissions disallows an operation.
781
"""
782
pass
783
784
785
class DBusPropertyNotFound(DBusPropertyException):
786
"""An attempt was made to access a non-existing property.
787
"""
788
pass
789
790
791
class DBusObjectWithProperties(dbus.service.Object):
792
"""A D-Bus object with properties.
793
794
Classes inheriting from this can use the dbus_service_property
795
decorator to expose methods as D-Bus properties. It exposes the
796
standard Get(), Set(), and GetAll() methods on the D-Bus.
797
"""
798
799
@staticmethod
800
def _is_dbus_property(obj):
801
return getattr(obj, "_dbus_is_property", False)
802
803
def _get_all_dbus_properties(self):
804
"""Returns a generator of (name, attribute) pairs
805
"""
806
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
807
for cls in self.__class__.__mro__
808
for name, prop in
809
inspect.getmembers(cls, self._is_dbus_property))
810
811
def _get_dbus_property(self, interface_name, property_name):
812
"""Returns a bound method if one exists which is a D-Bus
813
property with the specified name and interface.
814
"""
815
for cls in self.__class__.__mro__:
816
for name, value in (inspect.getmembers
817
(cls, self._is_dbus_property)):
818
if (value._dbus_name == property_name
819
and value._dbus_interface == interface_name):
820
return value.__get__(self)
821
822
# No such property
823
raise DBusPropertyNotFound(self.dbus_object_path + ":"
824
+ interface_name + "."
825
+ property_name)
826
827
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
828
out_signature="v")
829
def Get(self, interface_name, property_name):
830
"""Standard D-Bus property Get() method, see D-Bus standard.
831
"""
832
prop = self._get_dbus_property(interface_name, property_name)
833
if prop._dbus_access == "write":
834
raise DBusPropertyAccessException(property_name)
835
value = prop()
836
if not hasattr(value, "variant_level"):
837
return value
838
return type(value)(value, variant_level=value.variant_level+1)
839
840
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
841
def Set(self, interface_name, property_name, value):
842
"""Standard D-Bus property Set() method, see D-Bus standard.
843
"""
844
prop = self._get_dbus_property(interface_name, property_name)
845
if prop._dbus_access == "read":
846
raise DBusPropertyAccessException(property_name)
847
if prop._dbus_get_args_options["byte_arrays"]:
848
# The byte_arrays option is not supported yet on
849
# signatures other than "ay".
850
if prop._dbus_signature != "ay":
851
raise ValueError
852
value = dbus.ByteArray(''.join(unichr(byte)
853
for byte in value))
854
prop(value)
855
856
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
857
out_signature="a{sv}")
858
def GetAll(self, interface_name):
859
"""Standard D-Bus property GetAll() method, see D-Bus
860
standard.
861
862
Note: Will not include properties with access="write".
863
"""
864
properties = {}
865
for name, prop in self._get_all_dbus_properties():
866
if (interface_name
867
and interface_name != prop._dbus_interface):
868
# Interface non-empty but did not match
869
continue
870
# Ignore write-only properties
871
if prop._dbus_access == "write":
872
continue
873
value = prop()
874
if not hasattr(value, "variant_level"):
875
properties[name] = value
876
continue
877
properties[name] = type(value)(value, variant_level=
878
value.variant_level+1)
879
return dbus.Dictionary(properties, signature="sv")
880
881
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
882
out_signature="s",
883
path_keyword='object_path',
884
connection_keyword='connection')
885
def Introspect(self, object_path, connection):
886
"""Standard D-Bus method, overloaded to insert property tags.
887
"""
888
xmlstring = dbus.service.Object.Introspect(self, object_path,
889
connection)
890
try:
891
document = xml.dom.minidom.parseString(xmlstring)
892
def make_tag(document, name, prop):
893
e = document.createElement("property")
894
e.setAttribute("name", name)
895
e.setAttribute("type", prop._dbus_signature)
896
e.setAttribute("access", prop._dbus_access)
897
return e
898
for if_tag in document.getElementsByTagName("interface"):
899
for tag in (make_tag(document, name, prop)
900
for name, prop
901
in self._get_all_dbus_properties()
902
if prop._dbus_interface
903
== if_tag.getAttribute("name")):
904
if_tag.appendChild(tag)
905
# Add the names to the return values for the
906
# "org.freedesktop.DBus.Properties" methods
907
if (if_tag.getAttribute("name")
908
== "org.freedesktop.DBus.Properties"):
909
for cn in if_tag.getElementsByTagName("method"):
910
if cn.getAttribute("name") == "Get":
911
for arg in cn.getElementsByTagName("arg"):
912
if (arg.getAttribute("direction")
913
== "out"):
914
arg.setAttribute("name", "value")
915
elif cn.getAttribute("name") == "GetAll":
916
for arg in cn.getElementsByTagName("arg"):
917
if (arg.getAttribute("direction")
918
== "out"):
919
arg.setAttribute("name", "props")
920
xmlstring = document.toxml("utf-8")
921
document.unlink()
922
except (AttributeError, xml.dom.DOMException,
923
xml.parsers.expat.ExpatError) as error:
924
logger.error("Failed to override Introspection method",
925
error)
926
return xmlstring
927
928
929
def datetime_to_dbus (dt, variant_level=0):
930
"""Convert a UTC datetime.datetime() to a D-Bus type."""
931
if dt is None:
932
return dbus.String("", variant_level = variant_level)
933
return dbus.String(dt.isoformat(),
934
variant_level=variant_level)
935
936
937
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
938
.__metaclass__):
939
"""Applied to an empty subclass of a D-Bus object, this metaclass
940
will add additional D-Bus attributes matching a certain pattern.
941
"""
942
def __new__(mcs, name, bases, attr):
943
# Go through all the base classes which could have D-Bus
944
# methods, signals, or properties in them
945
for base in (b for b in bases
946
if issubclass(b, dbus.service.Object)):
947
# Go though all attributes of the base class
948
for attrname, attribute in inspect.getmembers(base):
949
# Ignore non-D-Bus attributes, and D-Bus attributes
950
# with the wrong interface name
951
if (not hasattr(attribute, "_dbus_interface")
952
or not attribute._dbus_interface
953
.startswith("se.recompile.Mandos")):
954
continue
955
# Create an alternate D-Bus interface name based on
956
# the current name
957
alt_interface = (attribute._dbus_interface
958
.replace("se.recompile.Mandos",
959
"se.bsnet.fukt.Mandos"))
960
# Is this a D-Bus signal?
961
if getattr(attribute, "_dbus_is_signal", False):
962
# Extract the original non-method function by
963
# black magic
964
nonmethod_func = (dict(
965
zip(attribute.func_code.co_freevars,
966
attribute.__closure__))["func"]
967
.cell_contents)
968
# Create a new, but exactly alike, function
969
# object, and decorate it to be a new D-Bus signal
970
# with the alternate D-Bus interface name
971
new_function = (dbus.service.signal
972
(alt_interface,
973
attribute._dbus_signature)
974
(types.FunctionType(
975
nonmethod_func.func_code,
976
nonmethod_func.func_globals,
977
nonmethod_func.func_name,
978
nonmethod_func.func_defaults,
979
nonmethod_func.func_closure)))
980
# Define a creator of a function to call both the
981
# old and new functions, so both the old and new
982
# signals gets sent when the function is called
983
def fixscope(func1, func2):
984
"""This function is a scope container to pass
985
func1 and func2 to the "call_both" function
986
outside of its arguments"""
987
def call_both(*args, **kwargs):
988
"""This function will emit two D-Bus
989
signals by calling func1 and func2"""
990
func1(*args, **kwargs)
991
func2(*args, **kwargs)
992
return call_both
993
# Create the "call_both" function and add it to
994
# the class
995
attr[attrname] = fixscope(attribute,
996
new_function)
997
# Is this a D-Bus method?
998
elif getattr(attribute, "_dbus_is_method", False):
999
# Create a new, but exactly alike, function
1000
# object. Decorate it to be a new D-Bus method
1001
# with the alternate D-Bus interface name. Add it
1002
# to the class.
1003
attr[attrname] = (dbus.service.method
1004
(alt_interface,
1005
attribute._dbus_in_signature,
1006
attribute._dbus_out_signature)
1007
(types.FunctionType
1008
(attribute.func_code,
1009
attribute.func_globals,
1010
attribute.func_name,
1011
attribute.func_defaults,
1012
attribute.func_closure)))
1013
# Is this a D-Bus property?
1014
elif getattr(attribute, "_dbus_is_property", False):
1015
# Create a new, but exactly alike, function
1016
# object, and decorate it to be a new D-Bus
1017
# property with the alternate D-Bus interface
1018
# name. Add it to the class.
1019
attr[attrname] = (dbus_service_property
1020
(alt_interface,
1021
attribute._dbus_signature,
1022
attribute._dbus_access,
1023
attribute
1024
._dbus_get_args_options
1025
["byte_arrays"])
1026
(types.FunctionType
1027
(attribute.func_code,
1028
attribute.func_globals,
1029
attribute.func_name,
1030
attribute.func_defaults,
1031
attribute.func_closure)))
1032
return type.__new__(mcs, name, bases, attr)
1033
1034
1035
class ClientDBus(Client, DBusObjectWithProperties):
1036
"""A Client class using D-Bus
1037
1038
Attributes:
1039
dbus_object_path: dbus.ObjectPath
1040
bus: dbus.SystemBus()
1041
"""
1042
1043
runtime_expansions = (Client.runtime_expansions
1044
+ ("dbus_object_path",))
1045
1046
# dbus.service.Object doesn't use super(), so we can't either.
1047
1048
def __init__(self, bus = None, *args, **kwargs):
1049
self.bus = bus
1050
Client.__init__(self, *args, **kwargs)
1051
1052
self._approvals_pending = 0
1053
# Only now, when this client is initialized, can it show up on
1054
# the D-Bus
1055
client_object_name = unicode(self.name).translate(
1056
{ord("."): ord("_"),
1057
ord("-"): ord("_")})
1058
self.dbus_object_path = (dbus.ObjectPath
1059
("/clients/" + client_object_name))
1060
DBusObjectWithProperties.__init__(self, self.bus,
1061
self.dbus_object_path)
1062
1063
def notifychangeproperty(transform_func,
1064
dbus_name, type_func=lambda x: x,
1065
variant_level=1):
1066
""" Modify a variable so that it's a property which announces
1067
its changes to DBus.
1068
1069
transform_fun: Function that takes a value and a variant_level
1070
and transforms it to a D-Bus type.
1071
dbus_name: D-Bus name of the variable
1072
type_func: Function that transform the value before sending it
1073
to the D-Bus. Default: no transform
1074
variant_level: D-Bus variant level. Default: 1
1075
"""
1076
attrname = "_{0}".format(dbus_name)
1077
def setter(self, value):
1078
if hasattr(self, "dbus_object_path"):
1079
if (not hasattr(self, attrname) or
1080
type_func(getattr(self, attrname, None))
1081
!= type_func(value)):
1082
dbus_value = transform_func(type_func(value),
1083
variant_level
1084
=variant_level)
1085
self.PropertyChanged(dbus.String(dbus_name),
1086
dbus_value)
1087
setattr(self, attrname, value)
1088
1089
return property(lambda self: getattr(self, attrname), setter)
1090
1091
1092
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1093
approvals_pending = notifychangeproperty(dbus.Boolean,
1094
"ApprovalPending",
1095
type_func = bool)
1096
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1097
last_enabled = notifychangeproperty(datetime_to_dbus,
1098
"LastEnabled")
1099
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1100
type_func = lambda checker:
1101
checker is not None)
1102
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1103
"LastCheckedOK")
1104
last_approval_request = notifychangeproperty(
1105
datetime_to_dbus, "LastApprovalRequest")
1106
approved_by_default = notifychangeproperty(dbus.Boolean,
1107
"ApprovedByDefault")
1108
approval_delay = notifychangeproperty(dbus.UInt64,
1109
"ApprovalDelay",
1110
type_func =
1111
timedelta_to_milliseconds)
1112
approval_duration = notifychangeproperty(
1113
dbus.UInt64, "ApprovalDuration",
1114
type_func = timedelta_to_milliseconds)
1115
host = notifychangeproperty(dbus.String, "Host")
1116
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1117
type_func =
1118
timedelta_to_milliseconds)
1119
extended_timeout = notifychangeproperty(
1120
dbus.UInt64, "ExtendedTimeout",
1121
type_func = timedelta_to_milliseconds)
1122
interval = notifychangeproperty(dbus.UInt64,
1123
"Interval",
1124
type_func =
1125
timedelta_to_milliseconds)
1126
checker_command = notifychangeproperty(dbus.String, "Checker")
1127
1128
del notifychangeproperty
1129
1130
def __del__(self, *args, **kwargs):
1131
try:
1132
self.remove_from_connection()
1133
except LookupError:
1134
pass
1135
if hasattr(DBusObjectWithProperties, "__del__"):
1136
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1137
Client.__del__(self, *args, **kwargs)
1138
1139
def checker_callback(self, pid, condition, command,
1140
*args, **kwargs):
1141
self.checker_callback_tag = None
1142
self.checker = None
1143
if os.WIFEXITED(condition):
1144
exitstatus = os.WEXITSTATUS(condition)
1145
# Emit D-Bus signal
1146
self.CheckerCompleted(dbus.Int16(exitstatus),
1147
dbus.Int64(condition),
1148
dbus.String(command))
1149
else:
1150
# Emit D-Bus signal
1151
self.CheckerCompleted(dbus.Int16(-1),
1152
dbus.Int64(condition),
1153
dbus.String(command))
1154
1155
return Client.checker_callback(self, pid, condition, command,
1156
*args, **kwargs)
1157
1158
def start_checker(self, *args, **kwargs):
1159
old_checker = self.checker
1160
if self.checker is not None:
1161
old_checker_pid = self.checker.pid
1162
else:
1163
old_checker_pid = None
1164
r = Client.start_checker(self, *args, **kwargs)
1165
# Only if new checker process was started
1166
if (self.checker is not None
1167
and old_checker_pid != self.checker.pid):
1168
# Emit D-Bus signal
1169
self.CheckerStarted(self.current_checker_command)
1170
return r
1171
1172
def _reset_approved(self):
1173
self.approved = None
1174
return False
1175
1176
def approve(self, value=True):
1177
self.send_changedstate()
1178
self.approved = value
1179
gobject.timeout_add(timedelta_to_milliseconds
1180
(self.approval_duration),
1181
self._reset_approved)
1182
1183
1184
## D-Bus methods, signals & properties
1185
_interface = "se.recompile.Mandos.Client"
1186
1187
## Signals
1188
1189
# CheckerCompleted - signal
1190
@dbus.service.signal(_interface, signature="nxs")
1191
def CheckerCompleted(self, exitcode, waitstatus, command):
1192
"D-Bus signal"
1193
pass
1194
1195
# CheckerStarted - signal
1196
@dbus.service.signal(_interface, signature="s")
1197
def CheckerStarted(self, command):
1198
"D-Bus signal"
1199
pass
1200
1201
# PropertyChanged - signal
1202
@dbus.service.signal(_interface, signature="sv")
1203
def PropertyChanged(self, property, value):
1204
"D-Bus signal"
1205
pass
1206
1207
# GotSecret - signal
1208
@dbus.service.signal(_interface)
1209
def GotSecret(self):
1210
"""D-Bus signal
1211
Is sent after a successful transfer of secret from the Mandos
1212
server to mandos-client
1213
"""
1214
pass
1215
1216
# Rejected - signal
1217
@dbus.service.signal(_interface, signature="s")
1218
def Rejected(self, reason):
1219
"D-Bus signal"
1220
pass
1221
1222
# NeedApproval - signal
1223
@dbus.service.signal(_interface, signature="tb")
1224
def NeedApproval(self, timeout, default):
1225
"D-Bus signal"
1226
return self.need_approval()
1227
1228
# NeRwequest - signal
1229
@dbus.service.signal(_interface, signature="s")
1230
def NewRequest(self, ip):
1231
"""D-Bus signal
1232
Is sent after a client request a password.
1233
"""
1234
pass
1235
1236
## Methods
1237
1238
# Approve - method
1239
@dbus.service.method(_interface, in_signature="b")
1240
def Approve(self, value):
1241
self.approve(value)
1242
1243
# CheckedOK - method
1244
@dbus.service.method(_interface)
1245
def CheckedOK(self):
1246
self.checked_ok()
1247
1248
# Enable - method
1249
@dbus.service.method(_interface)
1250
def Enable(self):
1251
"D-Bus method"
1252
self.enable()
1253
1254
# StartChecker - method
1255
@dbus.service.method(_interface)
1256
def StartChecker(self):
1257
"D-Bus method"
1258
self.start_checker()
1259
1260
# Disable - method
1261
@dbus.service.method(_interface)
1262
def Disable(self):
1263
"D-Bus method"
1264
self.disable()
1265
1266
# StopChecker - method
1267
@dbus.service.method(_interface)
1268
def StopChecker(self):
1269
self.stop_checker()
1270
1271
## Properties
1272
1273
# ApprovalPending - property
1274
@dbus_service_property(_interface, signature="b", access="read")
1275
def ApprovalPending_dbus_property(self):
1276
return dbus.Boolean(bool(self.approvals_pending))
1277
1278
# ApprovedByDefault - property
1279
@dbus_service_property(_interface, signature="b",
1280
access="readwrite")
1281
def ApprovedByDefault_dbus_property(self, value=None):
1282
if value is None: # get
1283
return dbus.Boolean(self.approved_by_default)
1284
self.approved_by_default = bool(value)
1285
1286
# ApprovalDelay - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def ApprovalDelay_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(self.approval_delay_milliseconds())
1292
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1293
1294
# ApprovalDuration - property
1295
@dbus_service_property(_interface, signature="t",
1296
access="readwrite")
1297
def ApprovalDuration_dbus_property(self, value=None):
1298
if value is None: # get
1299
return dbus.UInt64(timedelta_to_milliseconds(
1300
self.approval_duration))
1301
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1302
1303
# Name - property
1304
@dbus_service_property(_interface, signature="s", access="read")
1305
def Name_dbus_property(self):
1306
return dbus.String(self.name)
1307
1308
# Fingerprint - property
1309
@dbus_service_property(_interface, signature="s", access="read")
1310
def Fingerprint_dbus_property(self):
1311
return dbus.String(self.fingerprint)
1312
1313
# Host - property
1314
@dbus_service_property(_interface, signature="s",
1315
access="readwrite")
1316
def Host_dbus_property(self, value=None):
1317
if value is None: # get
1318
return dbus.String(self.host)
1319
self.host = unicode(value)
1320
1321
# Created - property
1322
@dbus_service_property(_interface, signature="s", access="read")
1323
def Created_dbus_property(self):
1324
return datetime_to_dbus(self.created)
1325
1326
# LastEnabled - property
1327
@dbus_service_property(_interface, signature="s", access="read")
1328
def LastEnabled_dbus_property(self):
1329
return datetime_to_dbus(self.last_enabled)
1330
1331
# Enabled - property
1332
@dbus_service_property(_interface, signature="b",
1333
access="readwrite")
1334
def Enabled_dbus_property(self, value=None):
1335
if value is None: # get
1336
return dbus.Boolean(self.enabled)
1337
if value:
1338
self.enable()
1339
else:
1340
self.disable()
1341
1342
# LastCheckedOK - property
1343
@dbus_service_property(_interface, signature="s",
1344
access="readwrite")
1345
def LastCheckedOK_dbus_property(self, value=None):
1346
if value is not None:
1347
self.checked_ok()
1348
return
1349
return datetime_to_dbus(self.last_checked_ok)
1350
1351
# Expires - property
1352
@dbus_service_property(_interface, signature="s", access="read")
1353
def Expires_dbus_property(self):
1354
return datetime_to_dbus(self.expires)
1355
1356
# LastApprovalRequest - property
1357
@dbus_service_property(_interface, signature="s", access="read")
1358
def LastApprovalRequest_dbus_property(self):
1359
return datetime_to_dbus(self.last_approval_request)
1360
1361
# Timeout - property
1362
@dbus_service_property(_interface, signature="t",
1363
access="readwrite")
1364
def Timeout_dbus_property(self, value=None):
1365
if value is None: # get
1366
return dbus.UInt64(self.timeout_milliseconds())
1367
self.timeout = datetime.timedelta(0, 0, 0, value)
1368
if getattr(self, "disable_initiator_tag", None) is None:
1369
return
1370
# Reschedule timeout
1371
gobject.source_remove(self.disable_initiator_tag)
1372
self.disable_initiator_tag = None
1373
self.expires = None
1374
time_to_die = timedelta_to_milliseconds((self
1375
.last_checked_ok
1376
+ self.timeout)
1377
- datetime.datetime
1378
.utcnow())
1379
if time_to_die <= 0:
1380
# The timeout has passed
1381
self.disable()
1382
else:
1383
self.expires = (datetime.datetime.utcnow()
1384
+ datetime.timedelta(milliseconds =
1385
time_to_die))
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die, self.disable))
1388
1389
# ExtendedTimeout - property
1390
@dbus_service_property(_interface, signature="t",
1391
access="readwrite")
1392
def ExtendedTimeout_dbus_property(self, value=None):
1393
if value is None: # get
1394
return dbus.UInt64(self.extended_timeout_milliseconds())
1395
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1396
1397
# Interval - property
1398
@dbus_service_property(_interface, signature="t",
1399
access="readwrite")
1400
def Interval_dbus_property(self, value=None):
1401
if value is None: # get
1402
return dbus.UInt64(self.interval_milliseconds())
1403
self.interval = datetime.timedelta(0, 0, 0, value)
1404
if getattr(self, "checker_initiator_tag", None) is None:
1405
return
1406
if self.enabled:
1407
# Reschedule checker run
1408
gobject.source_remove(self.checker_initiator_tag)
1409
self.checker_initiator_tag = (gobject.timeout_add
1410
(value, self.start_checker))
1411
self.start_checker() # Start one now, too
1412
1413
# Checker - property
1414
@dbus_service_property(_interface, signature="s",
1415
access="readwrite")
1416
def Checker_dbus_property(self, value=None):
1417
if value is None: # get
1418
return dbus.String(self.checker_command)
1419
self.checker_command = unicode(value)
1420
1421
# CheckerRunning - property
1422
@dbus_service_property(_interface, signature="b",
1423
access="readwrite")
1424
def CheckerRunning_dbus_property(self, value=None):
1425
if value is None: # get
1426
return dbus.Boolean(self.checker is not None)
1427
if value:
1428
self.start_checker()
1429
else:
1430
self.stop_checker()
1431
1432
# ObjectPath - property
1433
@dbus_service_property(_interface, signature="o", access="read")
1434
def ObjectPath_dbus_property(self):
1435
return self.dbus_object_path # is already a dbus.ObjectPath
1436
1437
# Secret = property
1438
@dbus_service_property(_interface, signature="ay",
1439
access="write", byte_arrays=True)
1440
def Secret_dbus_property(self, value):
1441
self.secret = str(value)
1442
1443
del _interface
1444
1445
1446
class ProxyClient(object):
1447
def __init__(self, child_pipe, fpr, address):
1448
self._pipe = child_pipe
1449
self._pipe.send(('init', fpr, address))
1450
if not self._pipe.recv():
1451
raise KeyError()
1452
1453
def __getattribute__(self, name):
1454
if name == '_pipe':
1455
return super(ProxyClient, self).__getattribute__(name)
1456
self._pipe.send(('getattr', name))
1457
data = self._pipe.recv()
1458
if data[0] == 'data':
1459
return data[1]
1460
if data[0] == 'function':
1461
def func(*args, **kwargs):
1462
self._pipe.send(('funcall', name, args, kwargs))
1463
return self._pipe.recv()[1]
1464
return func
1465
1466
def __setattr__(self, name, value):
1467
if name == '_pipe':
1468
return super(ProxyClient, self).__setattr__(name, value)
1469
self._pipe.send(('setattr', name, value))
1470
1471
1472
class ClientDBusTransitional(ClientDBus):
1473
__metaclass__ = AlternateDBusNamesMetaclass
1474
1475
1476
class ClientHandler(socketserver.BaseRequestHandler, object):
1477
"""A class to handle client connections.
1478
1479
Instantiated once for each connection to handle it.
303
def still_valid(self, now=None):
304
"""Has the timeout not yet passed for this client?"""
305
if now is None:
306
now = datetime.datetime.now()
307
if self.last_seen is None:
308
return now < (self.created + self.timeout)
309
else:
310
return now < (self.last_seen + self.timeout)
311
312
313
def peer_certificate(session):
314
"Return the peer's OpenPGP certificate as a bytestring"
315
# If not an OpenPGP certificate...
316
if gnutls.library.functions.gnutls_certificate_type_get\
317
(session._c_object) \
318
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
319
# ...do the normal thing
320
return session.peer_certificate
321
list_size = ctypes.c_uint()
322
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
323
(session._c_object, ctypes.byref(list_size))
324
if list_size.value == 0:
325
return None
326
cert = cert_list[0]
327
return ctypes.string_at(cert.data, cert.size)
328
329
330
def fingerprint(openpgp):
331
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
332
# New empty GnuTLS certificate
333
crt = gnutls.library.types.gnutls_openpgp_crt_t()
334
gnutls.library.functions.gnutls_openpgp_crt_init\
335
(ctypes.byref(crt))
336
# New GnuTLS "datum" with the OpenPGP public key
337
datum = gnutls.library.types.gnutls_datum_t\
338
(ctypes.cast(ctypes.c_char_p(openpgp),
339
ctypes.POINTER(ctypes.c_ubyte)),
340
ctypes.c_uint(len(openpgp)))
341
# Import the OpenPGP public key into the certificate
342
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
343
(crt,
344
ctypes.byref(datum),
345
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
346
# New buffer for the fingerprint
347
buffer = ctypes.create_string_buffer(20)
348
buffer_length = ctypes.c_size_t()
349
# Get the fingerprint from the certificate into the buffer
350
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
351
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
352
# Deinit the certificate
353
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
354
# Convert the buffer to a Python bytestring
355
fpr = ctypes.string_at(buffer, buffer_length.value)
356
# Convert the bytestring to hexadecimal notation
357
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
358
return hex_fpr
359
360
361
class tcp_handler(SocketServer.BaseRequestHandler, object):
362
"""A TCP request handler class.
363
Instantiated by IPv6_TCPServer for each request to handle it.
1480
364
Note: This will run in its own forked process."""
1481
365
1482
366
def handle(self):
1483
with contextlib.closing(self.server.child_pipe) as child_pipe:
1484
logger.info("TCP connection from: %s",
1485
unicode(self.client_address))
1486
logger.debug("Pipe FD: %d",
1487
self.server.child_pipe.fileno())
1488
1489
session = (gnutls.connection
1490
.ClientSession(self.request,
1491
gnutls.connection
1492
.X509Credentials()))
1493
1494
# Note: gnutls.connection.X509Credentials is really a
1495
# generic GnuTLS certificate credentials object so long as
1496
# no X.509 keys are added to it. Therefore, we can use it
1497
# here despite using OpenPGP certificates.
1498
1499
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1500
# "+AES-256-CBC", "+SHA1",
1501
# "+COMP-NULL", "+CTYPE-OPENPGP",
1502
# "+DHE-DSS"))
1503
# Use a fallback default, since this MUST be set.
1504
priority = self.server.gnutls_priority
1505
if priority is None:
1506
priority = "NORMAL"
1507
(gnutls.library.functions
1508
.gnutls_priority_set_direct(session._c_object,
1509
priority, None))
1510
1511
# Start communication using the Mandos protocol
1512
# Get protocol number
1513
line = self.request.makefile().readline()
1514
logger.debug("Protocol version: %r", line)
1515
try:
1516
if int(line.strip().split()[0]) > 1:
1517
raise RuntimeError
1518
except (ValueError, IndexError, RuntimeError) as error:
1519
logger.error("Unknown protocol version: %s", error)
1520
return
1521
1522
# Start GnuTLS connection
1523
try:
1524
session.handshake()
1525
except gnutls.errors.GNUTLSError as error:
1526
logger.warning("Handshake failed: %s", error)
1527
# Do not run session.bye() here: the session is not
1528
# established. Just abandon the request.
1529
return
1530
logger.debug("Handshake succeeded")
1531
1532
approval_required = False
1533
try:
1534
try:
1535
fpr = self.fingerprint(self.peer_certificate
1536
(session))
1537
except (TypeError,
1538
gnutls.errors.GNUTLSError) as error:
1539
logger.warning("Bad certificate: %s", error)
1540
return
1541
logger.debug("Fingerprint: %s", fpr)
1542
1543
try:
1544
client = ProxyClient(child_pipe, fpr,
1545
self.client_address)
1546
except KeyError:
1547
return
1548
1549
if self.server.use_dbus:
1550
# Emit D-Bus signal
1551
client.NewRequest(str(self.client_address))
1552
1553
if client.approval_delay:
1554
delay = client.approval_delay
1555
client.approvals_pending += 1
1556
approval_required = True
1557
1558
while True:
1559
if not client.enabled:
1560
logger.info("Client %s is disabled",
1561
client.name)
1562
if self.server.use_dbus:
1563
# Emit D-Bus signal
1564
client.Rejected("Disabled")
1565
return
1566
1567
if client.approved or not client.approval_delay:
1568
#We are approved or approval is disabled
1569
break
1570
elif client.approved is None:
1571
logger.info("Client %s needs approval",
1572
client.name)
1573
if self.server.use_dbus:
1574
# Emit D-Bus signal
1575
client.NeedApproval(
1576
client.approval_delay_milliseconds(),
1577
client.approved_by_default)
1578
else:
1579
logger.warning("Client %s was not approved",
1580
client.name)
1581
if self.server.use_dbus:
1582
# Emit D-Bus signal
1583
client.Rejected("Denied")
1584
return
1585
1586
#wait until timeout or approved
1587
time = datetime.datetime.now()
1588
client.changedstate.acquire()
1589
(client.changedstate.wait
1590
(float(client.timedelta_to_milliseconds(delay)
1591
/ 1000)))
1592
client.changedstate.release()
1593
time2 = datetime.datetime.now()
1594
if (time2 - time) >= delay:
1595
if not client.approved_by_default:
1596
logger.warning("Client %s timed out while"
1597
" waiting for approval",
1598
client.name)
1599
if self.server.use_dbus:
1600
# Emit D-Bus signal
1601
client.Rejected("Approval timed out")
1602
return
1603
else:
1604
break
1605
else:
1606
delay -= time2 - time
1607
1608
sent_size = 0
1609
while sent_size < len(client.secret):
1610
try:
1611
sent = session.send(client.secret[sent_size:])
1612
except gnutls.errors.GNUTLSError as error:
1613
logger.warning("gnutls send failed")
1614
return
1615
logger.debug("Sent: %d, remaining: %d",
1616
sent, len(client.secret)
1617
- (sent_size + sent))
1618
sent_size += sent
1619
1620
logger.info("Sending secret to %s", client.name)
1621
# bump the timeout using extended_timeout
1622
client.checked_ok(client.extended_timeout)
1623
if self.server.use_dbus:
1624
# Emit D-Bus signal
1625
client.GotSecret()
1626
1627
finally:
1628
if approval_required:
1629
client.approvals_pending -= 1
1630
try:
1631
session.bye()
1632
except gnutls.errors.GNUTLSError as error:
1633
logger.warning("GnuTLS bye failed")
1634
1635
@staticmethod
1636
def peer_certificate(session):
1637
"Return the peer's OpenPGP certificate as a bytestring"
1638
# If not an OpenPGP certificate...
1639
if (gnutls.library.functions
1640
.gnutls_certificate_type_get(session._c_object)
1641
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1642
# ...do the normal thing
1643
return session.peer_certificate
1644
list_size = ctypes.c_uint(1)
1645
cert_list = (gnutls.library.functions
1646
.gnutls_certificate_get_peers
1647
(session._c_object, ctypes.byref(list_size)))
1648
if not bool(cert_list) and list_size.value != 0:
1649
raise gnutls.errors.GNUTLSError("error getting peer"
1650
" certificate")
1651
if list_size.value == 0:
1652
return None
1653
cert = cert_list[0]
1654
return ctypes.string_at(cert.data, cert.size)
1655
1656
@staticmethod
1657
def fingerprint(openpgp):
1658
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1659
# New GnuTLS "datum" with the OpenPGP public key
1660
datum = (gnutls.library.types
1661
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1662
ctypes.POINTER
1663
(ctypes.c_ubyte)),
1664
ctypes.c_uint(len(openpgp))))
1665
# New empty GnuTLS certificate
1666
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1667
(gnutls.library.functions
1668
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1669
# Import the OpenPGP public key into the certificate
1670
(gnutls.library.functions
1671
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1672
gnutls.library.constants
1673
.GNUTLS_OPENPGP_FMT_RAW))
1674
# Verify the self signature in the key
1675
crtverify = ctypes.c_uint()
1676
(gnutls.library.functions
1677
.gnutls_openpgp_crt_verify_self(crt, 0,
1678
ctypes.byref(crtverify)))
1679
if crtverify.value != 0:
1680
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1681
raise (gnutls.errors.CertificateSecurityError
1682
("Verify failed"))
1683
# New buffer for the fingerprint
1684
buf = ctypes.create_string_buffer(20)
1685
buf_len = ctypes.c_size_t()
1686
# Get the fingerprint from the certificate into the buffer
1687
(gnutls.library.functions
1688
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1689
ctypes.byref(buf_len)))
1690
# Deinit the certificate
1691
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1692
# Convert the buffer to a Python bytestring
1693
fpr = ctypes.string_at(buf, buf_len.value)
1694
# Convert the bytestring to hexadecimal notation
1695
hex_fpr = binascii.hexlify(fpr).upper()
1696
return hex_fpr
1697
1698
1699
class MultiprocessingMixIn(object):
1700
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1701
def sub_process_main(self, request, address):
1702
try:
1703
self.finish_request(request, address)
1704
except Exception:
1705
self.handle_error(request, address)
1706
self.close_request(request)
1707
1708
def process_request(self, request, address):
1709
"""Start a new process to process the request."""
1710
proc = multiprocessing.Process(target = self.sub_process_main,
1711
args = (request,
1712
address))
1713
proc.start()
1714
return proc
1715
1716
1717
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1718
""" adds a pipe to the MixIn """
1719
def process_request(self, request, client_address):
1720
"""Overrides and wraps the original process_request().
1721
1722
This function creates a new pipe in self.pipe
1723
"""
1724
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1725
1726
proc = MultiprocessingMixIn.process_request(self, request,
1727
client_address)
1728
self.child_pipe.close()
1729
self.add_pipe(parent_pipe, proc)
1730
1731
def add_pipe(self, parent_pipe, proc):
1732
"""Dummy function; override as necessary"""
1733
raise NotImplementedError
1734
1735
1736
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1737
socketserver.TCPServer, object):
1738
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1739
367
logger.debug(u"TCP connection from: %s",
368
unicode(self.client_address))
369
session = gnutls.connection.ClientSession(self.request,
370
gnutls.connection.\
371
X509Credentials())
372
373
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
374
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
375
# "+DHE-DSS"))
376
priority = "NORMAL"
377
if self.server.options.priority:
378
priority = self.server.options.priority
379
gnutls.library.functions.gnutls_priority_set_direct\
380
(session._c_object, priority, None);
381
382
try:
383
session.handshake()
384
except gnutls.errors.GNUTLSError, error:
385
logger.debug(u"Handshake failed: %s", error)
386
# Do not run session.bye() here: the session is not
387
# established. Just abandon the request.
388
return
389
try:
390
fpr = fingerprint(peer_certificate(session))
391
except (TypeError, gnutls.errors.GNUTLSError), error:
392
logger.debug(u"Bad certificate: %s", error)
393
session.bye()
394
return
395
logger.debug(u"Fingerprint: %s", fpr)
396
client = None
397
for c in self.server.clients:
398
if c.fingerprint == fpr:
399
client = c
400
break
401
# Have to check if client.still_valid(), since it is possible
402
# that the client timed out while establishing the GnuTLS
403
# session.
404
if (not client) or (not client.still_valid()):
405
if client:
406
logger.debug(u"Client %(name)s is invalid",
407
vars(client))
408
else:
409
logger.debug(u"Client not found for fingerprint: %s",
410
fpr)
411
session.bye()
412
return
413
sent_size = 0
414
while sent_size < len(client.secret):
415
sent = session.send(client.secret[sent_size:])
416
logger.debug(u"Sent: %d, remaining: %d",
417
sent, len(client.secret)
418
- (sent_size + sent))
419
sent_size += sent
420
session.bye()
421
422
423
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
424
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1740
425
Attributes:
1741
enabled: Boolean; whether this server is activated yet
1742
interface: None or a network interface name (string)
1743
use_ipv6: Boolean; to use IPv6 or not
426
options: Command line options
427
clients: Set() of Client objects
1744
428
"""
1745
def __init__(self, server_address, RequestHandlerClass,
1746
interface=None, use_ipv6=True):
1747
self.interface = interface
1748
if use_ipv6:
1749
self.address_family = socket.AF_INET6
1750
socketserver.TCPServer.__init__(self, server_address,
1751
RequestHandlerClass)
429
address_family = socket.AF_INET6
430
def __init__(self, *args, **kwargs):
431
if "options" in kwargs:
432
self.options = kwargs["options"]
433
del kwargs["options"]
434
if "clients" in kwargs:
435
self.clients = kwargs["clients"]
436
del kwargs["clients"]
437
return super(type(self), self).__init__(*args, **kwargs)
1752
438
def server_bind(self):
1753
439
"""This overrides the normal server_bind() function
1754
440
to bind to an interface if one was specified, and also NOT to
1755
441
bind to an address or port if they were not specified."""
1756
if self.interface is not None:
1757
if SO_BINDTODEVICE is None:
1758
logger.error("SO_BINDTODEVICE does not exist;"
1759
" cannot bind to interface %s",
1760
self.interface)
1761
else:
1762
try:
1763
self.socket.setsockopt(socket.SOL_SOCKET,
1764
SO_BINDTODEVICE,
1765
str(self.interface
1766
+ '\0'))
1767
except socket.error as error:
1768
if error[0] == errno.EPERM:
1769
logger.error("No permission to"
1770
" bind to interface %s",
1771
self.interface)
1772
elif error[0] == errno.ENOPROTOOPT:
1773
logger.error("SO_BINDTODEVICE not available;"
1774
" cannot bind to interface %s",
1775
self.interface)
1776
else:
1777
raise
442
if self.options.interface:
443
if not hasattr(socket, "SO_BINDTODEVICE"):
444
# From /usr/include/asm-i486/socket.h
445
socket.SO_BINDTODEVICE = 25
446
try:
447
self.socket.setsockopt(socket.SOL_SOCKET,
448
socket.SO_BINDTODEVICE,
449
self.options.interface)
450
except socket.error, error:
451
if error[0] == errno.EPERM:
452
logger.warning(u"No permission to"
453
u" bind to interface %s",
454
self.options.interface)
455
else:
456
raise error
1778
457
# Only bind(2) the socket if we really need to.
1779
458
if self.server_address[0] or self.server_address[1]:
1780
459
if not self.server_address[0]:
1781
if self.address_family == socket.AF_INET6:
1782
any_address = "::" # in6addr_any
1783
else:
1784
any_address = socket.INADDR_ANY
1785
self.server_address = (any_address,
460
in6addr_any = "::"
461
self.server_address = (in6addr_any,
1786
462
self.server_address[1])
1787
elif not self.server_address[1]:
463
elif self.server_address[1] is None:
1788
464
self.server_address = (self.server_address[0],
1789
465
0)
1790
# if self.interface:
1791
# self.server_address = (self.server_address[0],
1792
# 0, # port
1793
# 0, # flowinfo
1794
# if_nametoindex
1795
# (self.interface))
1796
return socketserver.TCPServer.server_bind(self)
1797
1798
1799
class MandosServer(IPv6_TCPServer):
1800
"""Mandos server.
1801
1802
Attributes:
1803
clients: set of Client objects
1804
gnutls_priority GnuTLS priority string
1805
use_dbus: Boolean; to emit D-Bus signals or not
1806
1807
Assumes a gobject.MainLoop event loop.
1808
"""
1809
def __init__(self, server_address, RequestHandlerClass,
1810
interface=None, use_ipv6=True, clients=None,
1811
gnutls_priority=None, use_dbus=True):
1812
self.enabled = False
1813
self.clients = clients
1814
if self.clients is None:
1815
self.clients = {}
1816
self.use_dbus = use_dbus
1817
self.gnutls_priority = gnutls_priority
1818
IPv6_TCPServer.__init__(self, server_address,
1819
RequestHandlerClass,
1820
interface = interface,
1821
use_ipv6 = use_ipv6)
1822
def server_activate(self):
1823
if self.enabled:
1824
return socketserver.TCPServer.server_activate(self)
1825
1826
def enable(self):
1827
self.enabled = True
1828
1829
def add_pipe(self, parent_pipe, proc):
1830
# Call "handle_ipc" for both data and EOF events
1831
gobject.io_add_watch(parent_pipe.fileno(),
1832
gobject.IO_IN | gobject.IO_HUP,
1833
functools.partial(self.handle_ipc,
1834
parent_pipe =
1835
parent_pipe,
1836
proc = proc))
1837
1838
def handle_ipc(self, source, condition, parent_pipe=None,
1839
proc = None, client_object=None):
1840
condition_names = {
1841
gobject.IO_IN: "IN", # There is data to read.
1842
gobject.IO_OUT: "OUT", # Data can be written (without
1843
# blocking).
1844
gobject.IO_PRI: "PRI", # There is urgent data to read.
1845
gobject.IO_ERR: "ERR", # Error condition.
1846
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1847
# broken, usually for pipes and
1848
# sockets).
1849
}
1850
conditions_string = ' | '.join(name
1851
for cond, name in
1852
condition_names.iteritems()
1853
if cond & condition)
1854
# error, or the other end of multiprocessing.Pipe has closed
1855
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1856
# Wait for other process to exit
1857
proc.join()
1858
return False
1859
1860
# Read a request from the child
1861
request = parent_pipe.recv()
1862
command = request[0]
1863
1864
if command == 'init':
1865
fpr = request[1]
1866
address = request[2]
1867
1868
for c in self.clients.itervalues():
1869
if c.fingerprint == fpr:
1870
client = c
1871
break
1872
else:
1873
logger.info("Client not found for fingerprint: %s, ad"
1874
"dress: %s", fpr, address)
1875
if self.use_dbus:
1876
# Emit D-Bus signal
1877
mandos_dbus_service.ClientNotFound(fpr,
1878
address[0])
1879
parent_pipe.send(False)
1880
return False
1881
1882
gobject.io_add_watch(parent_pipe.fileno(),
1883
gobject.IO_IN | gobject.IO_HUP,
1884
functools.partial(self.handle_ipc,
1885
parent_pipe =
1886
parent_pipe,
1887
proc = proc,
1888
client_object =
1889
client))
1890
parent_pipe.send(True)
1891
# remove the old hook in favor of the new above hook on
1892
# same fileno
1893
return False
1894
if command == 'funcall':
1895
funcname = request[1]
1896
args = request[2]
1897
kwargs = request[3]
1898
1899
parent_pipe.send(('data', getattr(client_object,
1900
funcname)(*args,
1901
**kwargs)))
1902
1903
if command == 'getattr':
1904
attrname = request[1]
1905
if callable(client_object.__getattribute__(attrname)):
1906
parent_pipe.send(('function',))
1907
else:
1908
parent_pipe.send(('data', client_object
1909
.__getattribute__(attrname)))
1910
1911
if command == 'setattr':
1912
attrname = request[1]
1913
value = request[2]
1914
setattr(client_object, attrname, value)
1915
1916
return True
466
return super(type(self), self).server_bind()
1917
467
1918
468
1919
469
def string_to_delta(interval):
1920
470
"""Parse a string and return a datetime.timedelta
1921
471
1922
472
>>> string_to_delta('7d')
1923
473
datetime.timedelta(7)
1924
474
>>> string_to_delta('60s')
1927
477
datetime.timedelta(0, 3600)
1928
478
>>> string_to_delta('24h')
1929
479
datetime.timedelta(1)
1930
>>> string_to_delta('1w')
480
>>> string_to_delta(u'1w')
1931
481
datetime.timedelta(7)
1932
>>> string_to_delta('5m 30s')
1933
datetime.timedelta(0, 330)
1934
482
"""
1935
timevalue = datetime.timedelta(0)
1936
for s in interval.split():
1937
try:
1938
suffix = unicode(s[-1])
1939
value = int(s[:-1])
1940
if suffix == "d":
1941
delta = datetime.timedelta(value)
1942
elif suffix == "s":
1943
delta = datetime.timedelta(0, value)
1944
elif suffix == "m":
1945
delta = datetime.timedelta(0, 0, 0, 0, value)
1946
elif suffix == "h":
1947
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1948
elif suffix == "w":
1949
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1950
else:
1951
raise ValueError("Unknown suffix %r" % suffix)
1952
except (ValueError, IndexError) as e:
1953
raise ValueError(*(e.args))
1954
timevalue += delta
1955
return timevalue
1956
1957
1958
def daemon(nochdir = False, noclose = False):
483
try:
484
suffix=unicode(interval[-1])
485
value=int(interval[:-1])
486
if suffix == u"d":
487
delta = datetime.timedelta(value)
488
elif suffix == u"s":
489
delta = datetime.timedelta(0, value)
490
elif suffix == u"m":
491
delta = datetime.timedelta(0, 0, 0, 0, value)
492
elif suffix == u"h":
493
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
494
elif suffix == u"w":
495
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
496
else:
497
raise ValueError
498
except (ValueError, IndexError):
499
raise ValueError
500
return delta
501
502
503
def add_service():
504
"""Derived from the Avahi example code"""
505
global group, serviceName, serviceType, servicePort, serviceTXT, \
506
domain, host
507
if group is None:
508
group = dbus.Interface(
509
bus.get_object( avahi.DBUS_NAME,
510
server.EntryGroupNew()),
511
avahi.DBUS_INTERFACE_ENTRY_GROUP)
512
group.connect_to_signal('StateChanged',
513
entry_group_state_changed)
514
logger.debug(u"Adding service '%s' of type '%s' ...",
515
serviceName, serviceType)
516
517
group.AddService(
518
serviceInterface, # interface
519
avahi.PROTO_INET6, # protocol
520
dbus.UInt32(0), # flags
521
serviceName, serviceType,
522
domain, host,
523
dbus.UInt16(servicePort),
524
avahi.string_array_to_txt_array(serviceTXT))
525
group.Commit()
526
527
528
def remove_service():
529
"""From the Avahi example code"""
530
global group
531
532
if not group is None:
533
group.Reset()
534
535
536
def server_state_changed(state):
537
"""Derived from the Avahi example code"""
538
if state == avahi.SERVER_COLLISION:
539
logger.warning(u"Server name collision")
540
remove_service()
541
elif state == avahi.SERVER_RUNNING:
542
add_service()
543
544
545
def entry_group_state_changed(state, error):
546
"""Derived from the Avahi example code"""
547
global serviceName, server, rename_count
548
549
logger.debug(u"state change: %i", state)
550
551
if state == avahi.ENTRY_GROUP_ESTABLISHED:
552
logger.debug(u"Service established.")
553
elif state == avahi.ENTRY_GROUP_COLLISION:
554
555
rename_count = rename_count - 1
556
if rename_count > 0:
557
name = server.GetAlternativeServiceName(name)
558
logger.warning(u"Service name collision, "
559
u"changing name to '%s' ...", name)
560
remove_service()
561
add_service()
562
563
else:
564
logger.error(u"No suitable service name found after %i"
565
u" retries, exiting.", n_rename)
566
killme(1)
567
elif state == avahi.ENTRY_GROUP_FAILURE:
568
logger.error(u"Error in group state changed %s",
569
unicode(error))
570
killme(1)
571
572
573
def if_nametoindex(interface):
574
"""Call the C function if_nametoindex()"""
575
try:
576
libc = ctypes.cdll.LoadLibrary("libc.so.6")
577
return libc.if_nametoindex(interface)
578
except (OSError, AttributeError):
579
if "struct" not in sys.modules:
580
import struct
581
if "fcntl" not in sys.modules:
582
import fcntl
583
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
584
s = socket.socket()
585
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
586
struct.pack("16s16x", interface))
587
s.close()
588
interface_index = struct.unpack("I", ifreq[16:20])[0]
589
return interface_index
590
591
592
def daemon(nochdir, noclose):
1959
593
"""See daemon(3). Standard BSD Unix function.
1960
1961
594
This should really exist as os.daemon, but it doesn't (yet)."""
1962
595
if os.fork():
1963
596
sys.exit()
1964
597
os.setsid()
1965
598
if not nochdir:
1966
599
os.chdir("/")
1967
if os.fork():
1968
sys.exit()
1969
600
if not noclose:
1970
601
# Close all standard open file descriptors
1971
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
602
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
1972
603
if not stat.S_ISCHR(os.fstat(null).st_mode):
1973
604
raise OSError(errno.ENODEV,
1974
"%s not a character device"
1975
% os.path.devnull)
605
"/dev/null not a character device")
1976
606
os.dup2(null, sys.stdin.fileno())
1977
607
os.dup2(null, sys.stdout.fileno())
1978
608
os.dup2(null, sys.stderr.fileno())
1980
610
os.close(null)
1981
611
1982
612
613
def killme(status = 0):
614
logger.debug("Stopping server with exit status %d", status)
615
exitstatus = status
616
if main_loop_started:
617
main_loop.quit()
618
else:
619
sys.exit(status)
620
621
1983
622
def main():
1984
1985
##################################################################
1986
# Parsing of options, both command line and config file
1987
1988
parser = argparse.ArgumentParser()
1989
parser.add_argument("-v", "--version", action="version",
1990
version = "%%(prog)s %s" % version,
1991
help="show version number and exit")
1992
parser.add_argument("-i", "--interface", metavar="IF",
1993
help="Bind to interface IF")
1994
parser.add_argument("-a", "--address",
1995
help="Address to listen for requests on")
1996
parser.add_argument("-p", "--port", type=int,
1997
help="Port number to receive requests on")
1998
parser.add_argument("--check", action="store_true",
1999
help="Run self-test")
2000
parser.add_argument("--debug", action="store_true",
2001
help="Debug mode; run in foreground and log"
2002
" to terminal")
2003
parser.add_argument("--debuglevel", metavar="LEVEL",
2004
help="Debug level for stdout output")
2005
parser.add_argument("--priority", help="GnuTLS"
2006
" priority string (see GnuTLS documentation)")
2007
parser.add_argument("--servicename",
2008
metavar="NAME", help="Zeroconf service name")
2009
parser.add_argument("--configdir",
2010
default="/etc/mandos", metavar="DIR",
2011
help="Directory to search for configuration"
2012
" files")
2013
parser.add_argument("--no-dbus", action="store_false",
2014
dest="use_dbus", help="Do not provide D-Bus"
2015
" system bus interface")
2016
parser.add_argument("--no-ipv6", action="store_false",
2017
dest="use_ipv6", help="Do not use IPv6")
2018
parser.add_argument("--no-restore", action="store_false",
2019
dest="restore", help="Do not restore stored"
2020
" state")
2021
parser.add_argument("--statedir", metavar="DIR",
2022
help="Directory to save/restore state in")
2023
2024
options = parser.parse_args()
623
global exitstatus
624
exitstatus = 0
625
global main_loop_started
626
main_loop_started = False
627
628
parser = OptionParser()
629
parser.add_option("-i", "--interface", type="string",
630
default=None, metavar="IF",
631
help="Bind to interface IF")
632
parser.add_option("-a", "--address", type="string", default=None,
633
help="Address to listen for requests on")
634
parser.add_option("-p", "--port", type="int", default=None,
635
help="Port number to receive requests on")
636
parser.add_option("--check", action="store_true", default=False,
637
help="Run self-test")
638
parser.add_option("--debug", action="store_true", default=False,
639
help="Debug mode")
640
parser.add_option("--priority", type="string",
641
default="SECURE256",
642
help="GnuTLS priority string"
643
" (see GnuTLS documentation)")
644
parser.add_option("--servicename", type="string",
645
default="Mandos", help="Zeroconf service name")
646
(options, args) = parser.parse_args()
2025
647
2026
648
if options.check:
2027
649
import doctest
2028
650
doctest.testmod()
2029
651
sys.exit()
2030
652
2031
# Default values for config file for server-global settings
2032
server_defaults = { "interface": "",
2033
"address": "",
2034
"port": "",
2035
"debug": "False",
2036
"priority":
2037
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2038
"servicename": "Mandos",
2039
"use_dbus": "True",
2040
"use_ipv6": "True",
2041
"debuglevel": "",
2042
"restore": "True",
2043
"statedir": "/var/lib/mandos"
2044
}
2045
2046
# Parse config file for server-global settings
2047
server_config = configparser.SafeConfigParser(server_defaults)
2048
del server_defaults
2049
server_config.read(os.path.join(options.configdir,
2050
"mandos.conf"))
2051
# Convert the SafeConfigParser object to a dict
2052
server_settings = server_config.defaults()
2053
# Use the appropriate methods on the non-string config options
2054
for option in ("debug", "use_dbus", "use_ipv6"):
2055
server_settings[option] = server_config.getboolean("DEFAULT",
2056
option)
2057
if server_settings["port"]:
2058
server_settings["port"] = server_config.getint("DEFAULT",
2059
"port")
2060
del server_config
2061
2062
# Override the settings from the config file with command line
2063
# options, if set.
2064
for option in ("interface", "address", "port", "debug",
2065
"priority", "servicename", "configdir",
2066
"use_dbus", "use_ipv6", "debuglevel", "restore",
2067
"statedir"):
2068
value = getattr(options, option)
2069
if value is not None:
2070
server_settings[option] = value
2071
del options
2072
# Force all strings to be unicode
2073
for option in server_settings.keys():
2074
if type(server_settings[option]) is str:
2075
server_settings[option] = unicode(server_settings[option])
2076
# Now we have our good server settings in "server_settings"
2077
2078
##################################################################
2079
2080
# For convenience
2081
debug = server_settings["debug"]
2082
debuglevel = server_settings["debuglevel"]
2083
use_dbus = server_settings["use_dbus"]
2084
use_ipv6 = server_settings["use_ipv6"]
2085
stored_state_path = os.path.join(server_settings["statedir"],
2086
stored_state_file)
2087
2088
if debug:
2089
initlogger(logging.DEBUG)
2090
else:
2091
if not debuglevel:
2092
initlogger()
2093
else:
2094
level = getattr(logging, debuglevel.upper())
2095
initlogger(level)
2096
2097
if server_settings["servicename"] != "Mandos":
2098
syslogger.setFormatter(logging.Formatter
2099
('Mandos (%s) [%%(process)d]:'
2100
' %%(levelname)s: %%(message)s'
2101
% server_settings["servicename"]))
2102
2103
# Parse config file with clients
2104
client_config = configparser.SafeConfigParser(Client.client_defaults)
2105
client_config.read(os.path.join(server_settings["configdir"],
2106
"clients.conf"))
2107
2108
global mandos_dbus_service
2109
mandos_dbus_service = None
2110
2111
tcp_server = MandosServer((server_settings["address"],
2112
server_settings["port"]),
2113
ClientHandler,
2114
interface=(server_settings["interface"]
2115
or None),
2116
use_ipv6=use_ipv6,
2117
gnutls_priority=
2118
server_settings["priority"],
2119
use_dbus=use_dbus)
2120
if not debug:
2121
pidfilename = "/var/run/mandos.pid"
2122
try:
2123
pidfile = open(pidfilename, "w")
2124
except IOError:
2125
logger.error("Could not open file %r", pidfilename)
2126
2127
try:
2128
uid = pwd.getpwnam("_mandos").pw_uid
2129
gid = pwd.getpwnam("_mandos").pw_gid
2130
except KeyError:
2131
try:
2132
uid = pwd.getpwnam("mandos").pw_uid
2133
gid = pwd.getpwnam("mandos").pw_gid
2134
except KeyError:
2135
try:
2136
uid = pwd.getpwnam("nobody").pw_uid
2137
gid = pwd.getpwnam("nobody").pw_gid
2138
except KeyError:
2139
uid = 65534
2140
gid = 65534
2141
try:
2142
os.setgid(gid)
2143
os.setuid(uid)
2144
except OSError as error:
2145
if error[0] != errno.EPERM:
2146
raise error
2147
2148
if debug:
2149
# Enable all possible GnuTLS debugging
2150
2151
# "Use a log level over 10 to enable all debugging options."
2152
# - GnuTLS manual
2153
gnutls.library.functions.gnutls_global_set_log_level(11)
2154
2155
@gnutls.library.types.gnutls_log_func
2156
def debug_gnutls(level, string):
2157
logger.debug("GnuTLS: %s", string[:-1])
2158
2159
(gnutls.library.functions
2160
.gnutls_global_set_log_function(debug_gnutls))
2161
2162
# Redirect stdin so all checkers get /dev/null
2163
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2164
os.dup2(null, sys.stdin.fileno())
2165
if null > 2:
2166
os.close(null)
2167
else:
2168
# No console logging
2169
logger.removeHandler(console)
2170
2171
# Need to fork before connecting to D-Bus
2172
if not debug:
2173
# Close all input and output, do double fork, etc.
2174
daemon()
653
# Parse config file
654
defaults = { "timeout": "1h",
655
"interval": "5m",
656
"checker": "fping -q -- %%(fqdn)s",
657
}
658
client_config = ConfigParser.SafeConfigParser(defaults)
659
#client_config.readfp(open("global.conf"), "global.conf")
660
client_config.read("mandos-clients.conf")
661
662
global serviceName
663
serviceName = options.servicename;
2175
664
2176
665
global main_loop
666
global bus
667
global server
2177
668
# From the Avahi example code
2178
669
DBusGMainLoop(set_as_default=True )
2179
670
main_loop = gobject.MainLoop()
2180
671
bus = dbus.SystemBus()
672
server = dbus.Interface(
673
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
674
avahi.DBUS_INTERFACE_SERVER )
2181
675
# End of Avahi example code
2182
if use_dbus:
2183
try:
2184
bus_name = dbus.service.BusName("se.recompile.Mandos",
2185
bus, do_not_queue=True)
2186
old_bus_name = (dbus.service.BusName
2187
("se.bsnet.fukt.Mandos", bus,
2188
do_not_queue=True))
2189
except dbus.exceptions.NameExistsException as e:
2190
logger.error(unicode(e) + ", disabling D-Bus")
2191
use_dbus = False
2192
server_settings["use_dbus"] = False
2193
tcp_server.use_dbus = False
2194
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2195
service = AvahiServiceToSyslog(name =
2196
server_settings["servicename"],
2197
servicetype = "_mandos._tcp",
2198
protocol = protocol, bus = bus)
2199
if server_settings["interface"]:
2200
service.interface = (if_nametoindex
2201
(str(server_settings["interface"])))
2202
2203
global multiprocessing_manager
2204
multiprocessing_manager = multiprocessing.Manager()
2205
2206
client_class = Client
2207
if use_dbus:
2208
client_class = functools.partial(ClientDBusTransitional,
2209
bus = bus)
2210
2211
client_settings = Client.config_parser(client_config)
2212
old_client_settings = {}
2213
clients_data = []
2214
2215
# Get client data and settings from last running state.
2216
if server_settings["restore"]:
2217
try:
2218
with open(stored_state_path, "rb") as stored_state:
2219
clients_data, old_client_settings = (pickle.load
2220
(stored_state))
2221
os.remove(stored_state_path)
2222
except IOError as e:
2223
logger.warning("Could not load persistent state: {0}"
2224
.format(e))
2225
if e.errno != errno.ENOENT:
2226
raise
2227
2228
with PGPEngine() as pgp:
2229
for client in clients_data:
2230
client_name = client["name"]
2231
2232
# Decide which value to use after restoring saved state.
2233
# We have three different values: Old config file,
2234
# new config file, and saved state.
2235
# New config value takes precedence if it differs from old
2236
# config value, otherwise use saved state.
2237
for name, value in client_settings[client_name].items():
2238
try:
2239
# For each value in new config, check if it
2240
# differs from the old config value (Except for
2241
# the "secret" attribute)
2242
if (name != "secret" and
2243
value != old_client_settings[client_name]
2244
[name]):
2245
client[name] = value
2246
except KeyError:
2247
pass
2248
2249
# Clients who has passed its expire date can still be
2250
# enabled if its last checker was successful. Clients
2251
# whose checker failed before we stored its state is
2252
# assumed to have failed all checkers during downtime.
2253
if client["enabled"]:
2254
if datetime.datetime.utcnow() >= client["expires"]:
2255
if not client["last_checked_ok"]:
2256
logger.warning(
2257
"disabling client {0} - Client never "
2258
"performed a successfull checker"
2259
.format(client["name"]))
2260
client["enabled"] = False
2261
elif client["last_checker_status"] != 0:
2262
logger.warning(
2263
"disabling client {0} - Client "
2264
"last checker failed with error code {1}"
2265
.format(client["name"],
2266
client["last_checker_status"]))
2267
client["enabled"] = False
2268
else:
2269
client["expires"] = (datetime.datetime
2270
.utcnow()
2271
+ client["timeout"])
2272
2273
client["changedstate"] = (multiprocessing_manager
2274
.Condition
2275
(multiprocessing_manager
2276
.Lock()))
2277
client["checker"] = None
2278
if use_dbus:
2279
new_client = (ClientDBusTransitional.__new__
2280
(ClientDBusTransitional))
2281
tcp_server.clients[client_name] = new_client
2282
new_client.bus = bus
2283
for name, value in client.iteritems():
2284
setattr(new_client, name, value)
2285
client_object_name = unicode(client_name).translate(
2286
{ord("."): ord("_"),
2287
ord("-"): ord("_")})
2288
new_client.dbus_object_path = (dbus.ObjectPath
2289
("/clients/"
2290
+ client_object_name))
2291
DBusObjectWithProperties.__init__(new_client,
2292
new_client.bus,
2293
new_client
2294
.dbus_object_path)
2295
else:
2296
tcp_server.clients[client_name] = (Client.__new__
2297
(Client))
2298
for name, value in client.iteritems():
2299
setattr(tcp_server.clients[client_name],
2300
name, value)
2301
2302
try:
2303
tcp_server.clients[client_name].secret = (
2304
pgp.decrypt(tcp_server.clients[client_name]
2305
.encrypted_secret,
2306
client_settings[client_name]
2307
["secret"]))
2308
except PGPError:
2309
# If decryption fails, we use secret from new settings
2310
logger.debug("Failed to decrypt {0} old secret"
2311
.format(client_name))
2312
tcp_server.clients[client_name].secret = (
2313
client_settings[client_name]["secret"])
2314
2315
# Create/remove clients based on new changes made to config
2316
for clientname in set(old_client_settings) - set(client_settings):
2317
del tcp_server.clients[clientname]
2318
for clientname in set(client_settings) - set(old_client_settings):
2319
tcp_server.clients[clientname] = (client_class(name = clientname,
2320
config =
2321
client_settings
2322
[clientname]))
2323
2324
if not tcp_server.clients:
2325
logger.warning("No clients defined")
2326
676
677
debug = options.debug
678
679
if debug:
680
console = logging.StreamHandler()
681
# console.setLevel(logging.DEBUG)
682
console.setFormatter(logging.Formatter\
683
('%(levelname)s: %(message)s'))
684
logger.addHandler(console)
685
del console
686
687
clients = Set()
688
def remove_from_clients(client):
689
clients.remove(client)
690
if not clients:
691
logger.debug(u"No clients left, exiting")
692
killme()
693
694
clients.update(Set(Client(name=section,
695
stop_hook = remove_from_clients,
696
**(dict(client_config\
697
.items(section))))
698
for section in client_config.sections()))
699
2327
700
if not debug:
2328
try:
2329
with pidfile:
2330
pid = os.getpid()
2331
pidfile.write(str(pid) + "\n".encode("utf-8"))
2332
del pidfile
2333
except IOError:
2334
logger.error("Could not write to file %r with PID %d",
2335
pidfilename, pid)
2336
except NameError:
2337
# "pidfile" was never created
2338
pass
2339
del pidfilename
2340
signal.signal(signal.SIGINT, signal.SIG_IGN)
2341
2342
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2343
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2344
2345
if use_dbus:
2346
class MandosDBusService(dbus.service.Object):
2347
"""A D-Bus proxy object"""
2348
def __init__(self):
2349
dbus.service.Object.__init__(self, bus, "/")
2350
_interface = "se.recompile.Mandos"
2351
2352
@dbus.service.signal(_interface, signature="o")
2353
def ClientAdded(self, objpath):
2354
"D-Bus signal"
2355
pass
2356
2357
@dbus.service.signal(_interface, signature="ss")
2358
def ClientNotFound(self, fingerprint, address):
2359
"D-Bus signal"
2360
pass
2361
2362
@dbus.service.signal(_interface, signature="os")
2363
def ClientRemoved(self, objpath, name):
2364
"D-Bus signal"
2365
pass
2366
2367
@dbus.service.method(_interface, out_signature="ao")
2368
def GetAllClients(self):
2369
"D-Bus method"
2370
return dbus.Array(c.dbus_object_path
2371
for c in
2372
tcp_server.clients.itervalues())
2373
2374
@dbus.service.method(_interface,
2375
out_signature="a{oa{sv}}")
2376
def GetAllClientsWithProperties(self):
2377
"D-Bus method"
2378
return dbus.Dictionary(
2379
((c.dbus_object_path, c.GetAll(""))
2380
for c in tcp_server.clients.itervalues()),
2381
signature="oa{sv}")
2382
2383
@dbus.service.method(_interface, in_signature="o")
2384
def RemoveClient(self, object_path):
2385
"D-Bus method"
2386
for c in tcp_server.clients.itervalues():
2387
if c.dbus_object_path == object_path:
2388
del tcp_server.clients[c.name]
2389
c.remove_from_connection()
2390
# Don't signal anything except ClientRemoved
2391
c.disable(quiet=True)
2392
# Emit D-Bus signal
2393
self.ClientRemoved(object_path, c.name)
2394
return
2395
raise KeyError(object_path)
2396
2397
del _interface
2398
2399
class MandosDBusServiceTransitional(MandosDBusService):
2400
__metaclass__ = AlternateDBusNamesMetaclass
2401
mandos_dbus_service = MandosDBusServiceTransitional()
701
daemon(False, False)
2402
702
2403
703
def cleanup():
2404
704
"Cleanup function; run on exit"
2405
service.cleanup()
2406
2407
multiprocessing.active_children()
2408
if not (tcp_server.clients or client_settings):
2409
return
2410
2411
# Store client before exiting. Secrets are encrypted with key
2412
# based on what config file has. If config file is
2413
# removed/edited, old secret will thus be unrecovable.
2414
clients = []
2415
with PGPEngine() as pgp:
2416
for client in tcp_server.clients.itervalues():
2417
key = client_settings[client.name]["secret"]
2418
client.encrypted_secret = pgp.encrypt(client.secret,
2419
key)
2420
client_dict = {}
2421
2422
# A list of attributes that will not be stored when
2423
# shutting down.
2424
exclude = set(("bus", "changedstate", "secret",
2425
"checker"))
2426
for name, typ in (inspect.getmembers
2427
(dbus.service.Object)):
2428
exclude.add(name)
2429
2430
client_dict["encrypted_secret"] = (client
2431
.encrypted_secret)
2432
for attr in client.client_structure:
2433
if attr not in exclude:
2434
client_dict[attr] = getattr(client, attr)
2435
2436
clients.append(client_dict)
2437
del client_settings[client.name]["secret"]
2438
2439
try:
2440
with os.fdopen(os.open(stored_state_path,
2441
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2442
0600), "wb") as stored_state:
2443
pickle.dump((clients, client_settings), stored_state)
2444
except (IOError, OSError) as e:
2445
logger.warning("Could not save persistent state: {0}"
2446
.format(e))
2447
if e.errno not in (errno.ENOENT, errno.EACCES):
2448
raise
2449
2450
# Delete all clients, and settings from config
2451
while tcp_server.clients:
2452
name, client = tcp_server.clients.popitem()
2453
if use_dbus:
2454
client.remove_from_connection()
2455
# Don't signal anything except ClientRemoved
2456
client.disable(quiet=True)
2457
if use_dbus:
2458
# Emit D-Bus signal
2459
mandos_dbus_service.ClientRemoved(client
2460
.dbus_object_path,
2461
client.name)
2462
client_settings.clear()
2463
2464
atexit.register(cleanup)
2465
2466
for client in tcp_server.clients.itervalues():
2467
if use_dbus:
2468
# Emit D-Bus signal
2469
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2470
# Need to initiate checking of clients
2471
if client.enabled:
2472
client.init_checker()
2473
2474
tcp_server.enable()
2475
tcp_server.server_activate()
2476
2477
# Find out what port we got
2478
service.port = tcp_server.socket.getsockname()[1]
2479
if use_ipv6:
2480
logger.info("Now listening on address %r, port %d,"
2481
" flowinfo %d, scope_id %d"
2482
% tcp_server.socket.getsockname())
2483
else: # IPv4
2484
logger.info("Now listening on address %r, port %d"
2485
% tcp_server.socket.getsockname())
2486
2487
#service.interface = tcp_server.socket.getsockname()[3]
2488
2489
try:
705
global group
2490
706
# From the Avahi example code
2491
try:
2492
service.activate()
2493
except dbus.exceptions.DBusException as error:
2494
logger.critical("DBusException: %s", error)
2495
cleanup()
2496
sys.exit(1)
707
if not group is None:
708
group.Free()
709
group = None
2497
710
# End of Avahi example code
2498
711
2499
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2500
lambda *args, **kwargs:
2501
(tcp_server.handle_request
2502
(*args[2:], **kwargs) or True))
2503
712
while clients:
713
client = clients.pop()
714
client.stop_hook = None
715
client.stop()
716
717
atexit.register(cleanup)
718
719
if not debug:
720
signal.signal(signal.SIGINT, signal.SIG_IGN)
721
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
722
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
723
724
for client in clients:
725
client.start()
726
727
tcp_server = IPv6_TCPServer((options.address, options.port),
728
tcp_handler,
729
options=options,
730
clients=clients)
731
# Find out what random port we got
732
global servicePort
733
servicePort = tcp_server.socket.getsockname()[1]
734
logger.debug(u"Now listening on port %d", servicePort)
735
736
if options.interface is not None:
737
global serviceInterface
738
serviceInterface = if_nametoindex(options.interface)
739
740
# From the Avahi example code
741
server.connect_to_signal("StateChanged", server_state_changed)
742
try:
743
server_state_changed(server.GetState())
744
except dbus.exceptions.DBusException, error:
745
logger.critical(u"DBusException: %s", error)
746
killme(1)
747
# End of Avahi example code
748
749
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
750
lambda *args, **kwargs:
751
tcp_server.handle_request(*args[2:],
752
**kwargs) or True)
753
try:
2504
754
logger.debug("Starting main loop")
755
main_loop_started = True
2505
756
main_loop.run()
2506
except AvahiError as error:
2507
logger.critical("AvahiError: %s", error)
2508
cleanup()
2509
sys.exit(1)
2510
757
except KeyboardInterrupt:
2511
758
if debug:
2512
print("", file=sys.stderr)
2513
logger.debug("Server received KeyboardInterrupt")
2514
logger.debug("Server exiting")
2515
# Must run before the D-Bus bus name gets deregistered
2516
cleanup()
759
print
760
761
sys.exit(exitstatus)
2517
762
2518
763
if __name__ == '__main__':
2519
764
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0