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- Committer: Teddy Hogeborn
- Date: 2012-01-08 10:19:33 UTC
- Revision ID: teddy@recompile.se-20120108101933-xbtodqgepxax8hn1
Tags: version-1.5.2-1
* Makefile (version): Changed to "1.5.2".
* NEWS (Version 1.5.2): New entry.
* debian/changelog (1.5.2-1): - '' -
* NEWS (Version 1.5.2): New entry.
* debian/changelog (1.5.2-1): - '' -
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn
15
# Copyright © 2008 Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
import SocketServer
37
import SocketServer as socketserver
37
38
import socket
38
from optparse import OptionParser
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
44
45
import gnutls.library.functions
45
46
import gnutls.library.constants
46
47
import gnutls.library.types
47
import ConfigParser
48
import ConfigParser as configparser
48
49
import sys
49
50
import re
50
51
import os
51
52
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
58
import pwd
59
from contextlib import closing
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
60
68
61
69
import dbus
62
70
import dbus.service
65
73
from dbus.mainloop.glib import DBusGMainLoop
66
74
import ctypes
67
75
import ctypes.util
68
69
version = "1.0.2"
70
71
logger = logging.Logger('mandos')
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 = "1.5.2"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
72
92
syslogger = (logging.handlers.SysLogHandler
73
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
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(debug, 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
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
83
211
84
212
class AvahiError(Exception):
85
def __init__(self, value):
213
def __init__(self, value, *args, **kwargs):
86
214
self.value = value
87
super(AvahiError, self).__init__()
88
def __str__(self):
89
return repr(self.value)
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
90
218
91
219
class AvahiServiceError(AvahiError):
92
220
pass
97
225
98
226
class AvahiService(object):
99
227
"""An Avahi (Zeroconf) service.
228
100
229
Attributes:
101
230
interface: integer; avahi.IF_UNSPEC or an interface index.
102
231
Used to optionally bind to the specified interface.
110
239
max_renames: integer; maximum number of renames
111
240
rename_count: integer; counter so we only rename after collisions
112
241
a sensible number of times
242
group: D-Bus Entry Group
243
server: D-Bus Server
244
bus: dbus.SystemBus()
113
245
"""
114
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
247
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
117
250
self.interface = interface
118
251
self.name = name
119
252
self.type = servicetype
123
256
self.host = host
124
257
self.rename_count = 0
125
258
self.max_renames = max_renames
259
self.protocol = protocol
260
self.group = None # our entry group
261
self.server = None
262
self.bus = bus
263
self.entry_group_state_changed_match = None
126
264
def rename(self):
127
265
"""Derived from the Avahi example code"""
128
266
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
131
269
self.rename_count)
132
270
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
274
self.name)
139
275
self.remove()
140
self.add()
276
try:
277
self.add()
278
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
141
282
self.rename_count += 1
142
283
def remove(self):
143
284
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
285
if self.entry_group_state_changed_match is not None:
286
self.entry_group_state_changed_match.remove()
287
self.entry_group_state_changed_match = None
288
if self.group is not None:
289
self.group.Reset()
146
290
def add(self):
147
291
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus_struct(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus struct.
175
The format is special to this application, since we could not find
176
any other standard way."""
177
return dbus.Struct((dbus.Int16(dt.year),
178
dbus.Byte(dt.month),
179
dbus.Byte(dt.day),
180
dbus.Byte(dt.hour),
181
dbus.Byte(dt.minute),
182
dbus.Byte(dt.second),
183
dbus.UInt32(dt.microsecond)),
184
signature="nyyyyyu",
185
variant_level=variant_level)
186
187
188
class Client(dbus.service.Object):
292
self.remove()
293
if self.group is None:
294
self.group = dbus.Interface(
295
self.bus.get_object(avahi.DBUS_NAME,
296
self.server.EntryGroupNew()),
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
298
self.entry_group_state_changed_match = (
299
self.group.connect_to_signal(
300
'StateChanged', self.entry_group_state_changed))
301
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
302
self.name, self.type)
303
self.group.AddService(
304
self.interface,
305
self.protocol,
306
dbus.UInt32(0), # flags
307
self.name, self.type,
308
self.domain, self.host,
309
dbus.UInt16(self.port),
310
avahi.string_array_to_txt_array(self.TXT))
311
self.group.Commit()
312
def entry_group_state_changed(self, state, error):
313
"""Derived from the Avahi example code"""
314
logger.debug("Avahi entry group state change: %i", state)
315
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
logger.debug("Zeroconf service established.")
318
elif state == avahi.ENTRY_GROUP_COLLISION:
319
logger.info("Zeroconf service name collision.")
320
self.rename()
321
elif state == avahi.ENTRY_GROUP_FAILURE:
322
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
326
def cleanup(self):
327
"""Derived from the Avahi example code"""
328
if self.group is not None:
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
334
self.group = None
335
self.remove()
336
def server_state_changed(self, state, error=None):
337
"""Derived from the Avahi example code"""
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
348
if error is None:
349
logger.error(bad_states[state])
350
else:
351
logger.error(bad_states[state] + ": %r", error)
352
self.cleanup()
353
elif state == avahi.SERVER_RUNNING:
354
self.add()
355
else:
356
if error is None:
357
logger.debug("Unknown state: %r", state)
358
else:
359
logger.debug("Unknown state: %r: %r", state, error)
360
def activate(self):
361
"""Derived from the Avahi example code"""
362
if self.server is None:
363
self.server = dbus.Interface(
364
self.bus.get_object(avahi.DBUS_NAME,
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
367
avahi.DBUS_INTERFACE_SERVER)
368
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
370
self.server_state_changed(self.server.GetState())
371
372
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
380
return ret
381
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
388
class Client(object):
189
389
"""A representation of a client host served by this server.
390
190
391
Attributes:
191
name: string; from the config file, used in log messages
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
approval_duration: datetime.timedelta(); Duration of one approval
395
checker: subprocess.Popen(); a running checker process used
396
to see if the client lives.
397
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
if client lives. %() expansions are done at
401
runtime with vars(self) as dict, so that for
402
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
407
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
192
410
fingerprint: string (40 or 32 hexadecimal digits); used to
193
411
uniquely identify the client
194
secret: bytestring; sent verbatim (over TLS) to client
195
412
host: string; available for use by the checker command
196
created: datetime.datetime(); (UTC) object creation
197
last_started: datetime.datetime(); (UTC)
198
started: bool()
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
199
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, or None.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
200
423
timeout: datetime.timedelta(); How long from last_checked_ok
201
until this client is invalid
202
interval: datetime.timedelta(); How often to start a new checker
203
stop_hook: If set, called by stop() as stop_hook(self)
204
checker: subprocess.Popen(); a running checker process used
205
to see if the client lives.
206
'None' if no process is running.
207
checker_initiator_tag: a gobject event source tag, or None
208
stop_initiator_tag: - '' -
209
checker_callback_tag: - '' -
210
checker_command: string; External command which is run to check if
211
client lives. %() expansions are done at
212
runtime with vars(self) as dict, so that for
213
instance %(name)s can be used in the command.
214
dbus_object_path: dbus.ObjectPath
215
Private attibutes:
216
_timeout: Real variable for 'timeout'
217
_interval: Real variable for 'interval'
218
_timeout_milliseconds: Used when calling gobject.timeout_add()
219
_interval_milliseconds: - '' -
424
until this client is disabled
425
extended_timeout: extra long timeout when secret has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
220
429
"""
221
def _set_timeout(self, timeout):
222
"Setter function for the 'timeout' attribute"
223
self._timeout = timeout
224
self._timeout_milliseconds = ((self.timeout.days
225
* 24 * 60 * 60 * 1000)
226
+ (self.timeout.seconds * 1000)
227
+ (self.timeout.microseconds
228
// 1000))
229
# Emit D-Bus signal
230
self.PropertyChanged(dbus.String(u"timeout"),
231
(dbus.UInt64(self._timeout_milliseconds,
232
variant_level=1)))
233
timeout = property(lambda self: self._timeout, _set_timeout)
234
del _set_timeout
235
236
def _set_interval(self, interval):
237
"Setter function for the 'interval' attribute"
238
self._interval = interval
239
self._interval_milliseconds = ((self.interval.days
240
* 24 * 60 * 60 * 1000)
241
+ (self.interval.seconds
242
* 1000)
243
+ (self.interval.microseconds
244
// 1000))
245
# Emit D-Bus signal
246
self.PropertyChanged(dbus.String(u"interval"),
247
(dbus.UInt64(self._interval_milliseconds,
248
variant_level=1)))
249
interval = property(lambda self: self._interval, _set_interval)
250
del _set_interval
251
252
def __init__(self, name = None, stop_hook=None, config=None):
430
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
505
506
return settings
507
508
509
def __init__(self, settings, name = None):
253
510
"""Note: the 'checker' key in 'config' sets the
254
511
'checker_command' attribute and *not* the 'checker'
255
512
attribute."""
256
self.dbus_object_path = (dbus.ObjectPath
257
("/Mandos/clients/"
258
+ name.replace(".", "_")))
259
dbus.service.Object.__init__(self, bus,
260
self.dbus_object_path)
261
if config is None:
262
config = {}
263
513
self.name = name
264
logger.debug(u"Creating client %r", self.name)
514
# adding all client settings
515
for setting, value in settings.iteritems():
516
setattr(self, setting, value)
517
518
if self.enabled:
519
if not hasattr(self, "last_enabled"):
520
self.last_enabled = datetime.datetime.utcnow()
521
if not hasattr(self, "expires"):
522
self.expires = (datetime.datetime.utcnow()
523
+ self.timeout)
524
else:
525
self.last_enabled = None
526
self.expires = None
527
528
logger.debug("Creating client %r", self.name)
265
529
# Uppercase and remove spaces from fingerprint for later
266
530
# comparison purposes with return value from the fingerprint()
267
531
# function
268
self.fingerprint = (config["fingerprint"].upper()
269
.replace(u" ", u""))
270
logger.debug(u" Fingerprint: %s", self.fingerprint)
271
if "secret" in config:
272
self.secret = config["secret"].decode(u"base64")
273
elif "secfile" in config:
274
with closing(open(os.path.expanduser
275
(os.path.expandvars
276
(config["secfile"])))) as secfile:
277
self.secret = secfile.read()
278
else:
279
raise TypeError(u"No secret or secfile for client %s"
280
% self.name)
281
self.host = config.get("host", "")
282
self.created = datetime.datetime.utcnow()
283
self.started = False
284
self.last_started = None
285
self.last_checked_ok = None
286
self.timeout = string_to_delta(config["timeout"])
287
self.interval = string_to_delta(config["interval"])
288
self.stop_hook = stop_hook
532
logger.debug(" Fingerprint: %s", self.fingerprint)
533
self.created = settings.get("created",
534
datetime.datetime.utcnow())
535
536
# attributes specific for this server instance
289
537
self.checker = None
290
538
self.checker_initiator_tag = None
291
self.stop_initiator_tag = None
539
self.disable_initiator_tag = None
292
540
self.checker_callback_tag = None
293
self.checker_command = config["checker"]
294
295
def start(self):
541
self.current_checker_command = None
542
self.approved = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
556
if not name.startswith("_"):
557
self.client_structure.append(name)
558
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
563
564
def enable(self):
296
565
"""Start this client's checker and timeout hooks"""
297
self.last_started = datetime.datetime.utcnow()
566
if getattr(self, "enabled", False):
567
# Already enabled
568
return
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
571
self.enabled = True
572
self.last_enabled = datetime.datetime.utcnow()
573
self.init_checker()
574
575
def disable(self, quiet=True):
576
"""Disable this client."""
577
if not getattr(self, "enabled", False):
578
return False
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
590
self.stop_checker()
591
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
593
return False
594
595
def __del__(self):
596
self.disable()
597
598
def init_checker(self):
298
599
# Schedule a new checker to be started an 'interval' from now,
299
600
# and every interval from then on.
300
601
self.checker_initiator_tag = (gobject.timeout_add
301
(self._interval_milliseconds,
602
(self.interval_milliseconds(),
302
603
self.start_checker))
604
# Schedule a disable() when 'timeout' has passed
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
303
608
# Also start a new checker *right now*.
304
609
self.start_checker()
305
# Schedule a stop() when 'timeout' has passed
306
self.stop_initiator_tag = (gobject.timeout_add
307
(self._timeout_milliseconds,
308
self.stop))
309
self.started = True
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"started"),
312
dbus.Boolean(True, variant_level=1))
313
self.PropertyChanged(dbus.String(u"last_started"),
314
(_datetime_to_dbus_struct
315
(self.last_started, variant_level=1)))
316
317
def stop(self):
318
"""Stop this client."""
319
if not getattr(self, "started", False):
320
return False
321
logger.info(u"Stopping client %s", self.name)
322
if getattr(self, "stop_initiator_tag", False):
323
gobject.source_remove(self.stop_initiator_tag)
324
self.stop_initiator_tag = None
325
if getattr(self, "checker_initiator_tag", False):
326
gobject.source_remove(self.checker_initiator_tag)
327
self.checker_initiator_tag = None
328
self.stop_checker()
329
if self.stop_hook:
330
self.stop_hook(self)
331
self.started = False
332
# Emit D-Bus signal
333
self.PropertyChanged(dbus.String(u"started"),
334
dbus.Boolean(False, variant_level=1))
335
# Do not run this again if called by a gobject.timeout_add
336
return False
337
338
def __del__(self):
339
self.stop_hook = None
340
self.stop()
341
610
342
611
def checker_callback(self, pid, condition, command):
343
612
"""The checker has completed, so take appropriate actions."""
344
613
self.checker_callback_tag = None
345
614
self.checker = None
346
# Emit D-Bus signal
347
self.PropertyChanged(dbus.String(u"checker_running"),
348
dbus.Boolean(False, variant_level=1))
349
if (os.WIFEXITED(condition)
350
and (os.WEXITSTATUS(condition) == 0)):
351
logger.info(u"Checker for %(name)s succeeded",
352
vars(self))
353
# Emit D-Bus signal
354
self.CheckerCompleted(dbus.Boolean(True),
355
dbus.UInt16(condition),
356
dbus.String(command))
357
self.bump_timeout()
358
elif not os.WIFEXITED(condition):
359
logger.warning(u"Checker for %(name)s crashed?",
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
617
if self.last_checker_status == 0:
618
logger.info("Checker for %(name)s succeeded",
619
vars(self))
620
self.checked_ok()
621
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
624
else:
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
360
627
vars(self))
361
# Emit D-Bus signal
362
self.CheckerCompleted(dbus.Boolean(False),
363
dbus.UInt16(condition),
364
dbus.String(command))
365
else:
366
logger.info(u"Checker for %(name)s failed",
367
vars(self))
368
# Emit D-Bus signal
369
self.CheckerCompleted(dbus.Boolean(False),
370
dbus.UInt16(condition),
371
dbus.String(command))
372
628
373
def bump_timeout(self):
629
def checked_ok(self, timeout=None):
374
630
"""Bump up the timeout for this client.
631
375
632
This should only be called when the client has been seen,
376
633
alive and well.
377
634
"""
635
if timeout is None:
636
timeout = self.timeout
378
637
self.last_checked_ok = datetime.datetime.utcnow()
379
gobject.source_remove(self.stop_initiator_tag)
380
self.stop_initiator_tag = (gobject.timeout_add
381
(self._timeout_milliseconds,
382
self.stop))
383
self.PropertyChanged(dbus.String(u"last_checked_ok"),
384
(_datetime_to_dbus_struct
385
(self.last_checked_ok,
386
variant_level=1)))
638
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
640
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
644
self.expires = datetime.datetime.utcnow() + timeout
645
646
def need_approval(self):
647
self.last_approval_request = datetime.datetime.utcnow()
387
648
388
649
def start_checker(self):
389
650
"""Start a new checker subprocess if one is not running.
651
390
652
If a checker already exists, leave it running and do
391
653
nothing."""
392
654
# The reason for not killing a running checker is that if we
395
657
# client would inevitably timeout, since no checker would get
396
658
# a chance to run to completion. If we instead leave running
397
659
# checkers alone, the checker would have to take more time
398
# than 'timeout' for the client to be declared invalid, which
399
# is as it should be.
660
# than 'timeout' for the client to be disabled, which is as it
661
# should be.
662
663
# If a checker exists, make sure it is not a zombie
664
try:
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
671
if pid:
672
logger.warning("Checker was a zombie")
673
gobject.source_remove(self.checker_callback_tag)
674
self.checker_callback(pid, status,
675
self.current_checker_command)
676
# Start a new checker if needed
400
677
if self.checker is None:
401
678
try:
402
679
# In case checker_command has exactly one % operator
403
680
command = self.checker_command % self.host
404
681
except TypeError:
405
682
# Escape attributes for the shell
406
escaped_attrs = dict((key, re.escape(str(val)))
407
for key, val in
408
vars(self).iteritems())
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
409
691
try:
410
692
command = self.checker_command % escaped_attrs
411
except TypeError, error:
412
logger.error(u'Could not format string "%s":'
413
u' %s', self.checker_command, error)
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
414
696
return True # Try again later
697
self.current_checker_command = command
415
698
try:
416
logger.info(u"Starting checker %r for %s",
699
logger.info("Starting checker %r for %s",
417
700
command, self.name)
418
701
# We don't need to redirect stdout and stderr, since
419
702
# in normal mode, that is already done by daemon(),
422
705
self.checker = subprocess.Popen(command,
423
706
close_fds=True,
424
707
shell=True, cwd="/")
425
# Emit D-Bus signal
426
self.CheckerStarted(command)
427
self.PropertyChanged(dbus.String("checker_running"),
428
dbus.Boolean(True, variant_level=1))
429
708
self.checker_callback_tag = (gobject.child_watch_add
430
709
(self.checker.pid,
431
710
self.checker_callback,
432
711
data=command))
433
except OSError, error:
434
logger.error(u"Failed to start subprocess: %s",
712
# The checker may have completed before the gobject
713
# watch was added. Check for this.
714
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
715
if pid:
716
gobject.source_remove(self.checker_callback_tag)
717
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
435
720
error)
436
721
# Re-run this periodically if run by gobject.timeout_add
437
722
return True
443
728
self.checker_callback_tag = None
444
729
if getattr(self, "checker", None) is None:
445
730
return
446
logger.debug(u"Stopping checker for %(name)s", vars(self))
731
logger.debug("Stopping checker for %(name)s", vars(self))
447
732
try:
448
733
os.kill(self.checker.pid, signal.SIGTERM)
449
#os.sleep(0.5)
734
#time.sleep(0.5)
450
735
#if self.checker.poll() is None:
451
736
# os.kill(self.checker.pid, signal.SIGKILL)
452
except OSError, error:
737
except OSError as error:
453
738
if error.errno != errno.ESRCH: # No such process
454
739
raise
455
740
self.checker = None
456
self.PropertyChanged(dbus.String(u"checker_running"),
457
dbus.Boolean(False, variant_level=1))
458
459
def still_valid(self):
460
"""Has the timeout not yet passed for this client?"""
461
if not getattr(self, "started", False):
462
return False
463
now = datetime.datetime.utcnow()
464
if self.last_checked_ok is None:
465
return now < (self.created + self.timeout)
466
else:
467
return now < (self.last_checked_ok + self.timeout)
468
469
## D-Bus methods & signals
470
_interface = u"org.mandos_system.Mandos.Client"
471
472
# BumpTimeout - method
473
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
474
BumpTimeout.__name__ = "BumpTimeout"
741
742
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
745
"""Decorators for marking methods of a DBusObjectWithProperties to
746
become properties on the D-Bus.
747
748
The decorated method will be called with no arguments by "Get"
749
and with one argument by "Set".
750
751
The parameters, where they are supported, are the same as
752
dbus.service.method, except there is only "signature", since the
753
type from Get() and the type sent to Set() is the same.
754
"""
755
# Encoding deeply encoded byte arrays is not supported yet by the
756
# "Set" method, so we fail early here:
757
if byte_arrays and signature != "ay":
758
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
760
def decorator(func):
761
func._dbus_is_property = True
762
func._dbus_interface = dbus_interface
763
func._dbus_signature = signature
764
func._dbus_access = access
765
func._dbus_name = func.__name__
766
if func._dbus_name.endswith("_dbus_property"):
767
func._dbus_name = func._dbus_name[:-14]
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
return func
770
return decorator
771
772
773
class DBusPropertyException(dbus.exceptions.DBusException):
774
"""A base class for D-Bus property-related exceptions
775
"""
776
def __unicode__(self):
777
return unicode(str(self))
778
779
780
class DBusPropertyAccessException(DBusPropertyException):
781
"""A property's access permissions disallows an operation.
782
"""
783
pass
784
785
786
class DBusPropertyNotFound(DBusPropertyException):
787
"""An attempt was made to access a non-existing property.
788
"""
789
pass
790
791
792
class DBusObjectWithProperties(dbus.service.Object):
793
"""A D-Bus object with properties.
794
795
Classes inheriting from this can use the dbus_service_property
796
decorator to expose methods as D-Bus properties. It exposes the
797
standard Get(), Set(), and GetAll() methods on the D-Bus.
798
"""
799
800
@staticmethod
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
803
804
def _get_all_dbus_properties(self):
805
"""Returns a generator of (name, attribute) pairs
806
"""
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
811
812
def _get_dbus_property(self, interface_name, property_name):
813
"""Returns a bound method if one exists which is a D-Bus
814
property with the specified name and interface.
815
"""
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
819
if (value._dbus_name == property_name
820
and value._dbus_interface == interface_name):
821
return value.__get__(self)
822
823
# No such property
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
827
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
829
out_signature="v")
830
def Get(self, interface_name, property_name):
831
"""Standard D-Bus property Get() method, see D-Bus standard.
832
"""
833
prop = self._get_dbus_property(interface_name, property_name)
834
if prop._dbus_access == "write":
835
raise DBusPropertyAccessException(property_name)
836
value = prop()
837
if not hasattr(value, "variant_level"):
838
return value
839
return type(value)(value, variant_level=value.variant_level+1)
840
841
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
842
def Set(self, interface_name, property_name, value):
843
"""Standard D-Bus property Set() method, see D-Bus standard.
844
"""
845
prop = self._get_dbus_property(interface_name, property_name)
846
if prop._dbus_access == "read":
847
raise DBusPropertyAccessException(property_name)
848
if prop._dbus_get_args_options["byte_arrays"]:
849
# The byte_arrays option is not supported yet on
850
# signatures other than "ay".
851
if prop._dbus_signature != "ay":
852
raise ValueError
853
value = dbus.ByteArray(b''.join(chr(byte)
854
for byte in value))
855
prop(value)
856
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
858
out_signature="a{sv}")
859
def GetAll(self, interface_name):
860
"""Standard D-Bus property GetAll() method, see D-Bus
861
standard.
862
863
Note: Will not include properties with access="write".
864
"""
865
properties = {}
866
for name, prop in self._get_all_dbus_properties():
867
if (interface_name
868
and interface_name != prop._dbus_interface):
869
# Interface non-empty but did not match
870
continue
871
# Ignore write-only properties
872
if prop._dbus_access == "write":
873
continue
874
value = prop()
875
if not hasattr(value, "variant_level"):
876
properties[name] = value
877
continue
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
880
return dbus.Dictionary(properties, signature="sv")
881
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
883
out_signature="s",
884
path_keyword='object_path',
885
connection_keyword='connection')
886
def Introspect(self, object_path, connection):
887
"""Standard D-Bus method, overloaded to insert property tags.
888
"""
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
891
try:
892
document = xml.dom.minidom.parseString(xmlstring)
893
def make_tag(document, name, prop):
894
e = document.createElement("property")
895
e.setAttribute("name", name)
896
e.setAttribute("type", prop._dbus_signature)
897
e.setAttribute("access", prop._dbus_access)
898
return e
899
for if_tag in document.getElementsByTagName("interface"):
900
for tag in (make_tag(document, name, prop)
901
for name, prop
902
in self._get_all_dbus_properties()
903
if prop._dbus_interface
904
== if_tag.getAttribute("name")):
905
if_tag.appendChild(tag)
906
# Add the names to the return values for the
907
# "org.freedesktop.DBus.Properties" methods
908
if (if_tag.getAttribute("name")
909
== "org.freedesktop.DBus.Properties"):
910
for cn in if_tag.getElementsByTagName("method"):
911
if cn.getAttribute("name") == "Get":
912
for arg in cn.getElementsByTagName("arg"):
913
if (arg.getAttribute("direction")
914
== "out"):
915
arg.setAttribute("name", "value")
916
elif cn.getAttribute("name") == "GetAll":
917
for arg in cn.getElementsByTagName("arg"):
918
if (arg.getAttribute("direction")
919
== "out"):
920
arg.setAttribute("name", "props")
921
xmlstring = document.toxml("utf-8")
922
document.unlink()
923
except (AttributeError, xml.dom.DOMException,
924
xml.parsers.expat.ExpatError) as error:
925
logger.error("Failed to override Introspection method",
926
error)
927
return xmlstring
928
929
930
def datetime_to_dbus (dt, variant_level=0):
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
if dt is None:
933
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
942
"""
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
950
# Ignore non-D-Bus attributes, and D-Bus attributes
951
# with the wrong interface name
952
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
955
continue
956
# Create an alternate D-Bus interface name based on
957
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
961
# Is this a D-Bus signal?
962
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
966
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
969
# Create a new, but exactly alike, function
970
# object, and decorate it to be a new D-Bus signal
971
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
981
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
984
def fixscope(func1, func2):
985
"""This function is a scope container to pass
986
func1 and func2 to the "call_both" function
987
outside of its arguments"""
988
def call_both(*args, **kwargs):
989
"""This function will emit two D-Bus
990
signals by calling func1 and func2"""
991
func1(*args, **kwargs)
992
func2(*args, **kwargs)
993
return call_both
994
# Create the "call_both" function and add it to
995
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
998
# Is this a D-Bus method?
999
elif getattr(attribute, "_dbus_is_method", False):
1000
# Create a new, but exactly alike, function
1001
# object. Decorate it to be a new D-Bus method
1002
# with the alternate D-Bus interface name. Add it
1003
# to the class.
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1014
# Is this a D-Bus property?
1015
elif getattr(attribute, "_dbus_is_property", False):
1016
# Create a new, but exactly alike, function
1017
# object, and decorate it to be a new D-Bus
1018
# property with the alternate D-Bus interface
1019
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
1036
class ClientDBus(Client, DBusObjectWithProperties):
1037
"""A Client class using D-Bus
1038
1039
Attributes:
1040
dbus_object_path: dbus.ObjectPath
1041
bus: dbus.SystemBus()
1042
"""
1043
1044
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
1047
# dbus.service.Object doesn't use super(), so we can't either.
1048
1049
def __init__(self, bus = None, *args, **kwargs):
1050
self.bus = bus
1051
Client.__init__(self, *args, **kwargs)
1052
# Only now, when this client is initialized, can it show up on
1053
# the D-Bus
1054
client_object_name = unicode(self.name).translate(
1055
{ord("."): ord("_"),
1056
ord("-"): ord("_")})
1057
self.dbus_object_path = (dbus.ObjectPath
1058
("/clients/" + client_object_name))
1059
DBusObjectWithProperties.__init__(self, self.bus,
1060
self.dbus_object_path)
1061
1062
def notifychangeproperty(transform_func,
1063
dbus_name, type_func=lambda x: x,
1064
variant_level=1):
1065
""" Modify a variable so that it's a property which announces
1066
its changes to DBus.
1067
1068
transform_fun: Function that takes a value and a variant_level
1069
and transforms it to a D-Bus type.
1070
dbus_name: D-Bus name of the variable
1071
type_func: Function that transform the value before sending it
1072
to the D-Bus. Default: no transform
1073
variant_level: D-Bus variant level. Default: 1
1074
"""
1075
attrname = "_{0}".format(dbus_name)
1076
def setter(self, value):
1077
if hasattr(self, "dbus_object_path"):
1078
if (not hasattr(self, attrname) or
1079
type_func(getattr(self, attrname, None))
1080
!= type_func(value)):
1081
dbus_value = transform_func(type_func(value),
1082
variant_level
1083
=variant_level)
1084
self.PropertyChanged(dbus.String(dbus_name),
1085
dbus_value)
1086
setattr(self, attrname, value)
1087
1088
return property(lambda self: getattr(self, attrname), setter)
1089
1090
1091
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1092
approvals_pending = notifychangeproperty(dbus.Boolean,
1093
"ApprovalPending",
1094
type_func = bool)
1095
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1096
last_enabled = notifychangeproperty(datetime_to_dbus,
1097
"LastEnabled")
1098
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1099
type_func = lambda checker:
1100
checker is not None)
1101
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1102
"LastCheckedOK")
1103
last_approval_request = notifychangeproperty(
1104
datetime_to_dbus, "LastApprovalRequest")
1105
approved_by_default = notifychangeproperty(dbus.Boolean,
1106
"ApprovedByDefault")
1107
approval_delay = notifychangeproperty(dbus.UInt64,
1108
"ApprovalDelay",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
approval_duration = notifychangeproperty(
1112
dbus.UInt64, "ApprovalDuration",
1113
type_func = timedelta_to_milliseconds)
1114
host = notifychangeproperty(dbus.String, "Host")
1115
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
extended_timeout = notifychangeproperty(
1119
dbus.UInt64, "ExtendedTimeout",
1120
type_func = timedelta_to_milliseconds)
1121
interval = notifychangeproperty(dbus.UInt64,
1122
"Interval",
1123
type_func =
1124
timedelta_to_milliseconds)
1125
checker_command = notifychangeproperty(dbus.String, "Checker")
1126
1127
del notifychangeproperty
1128
1129
def __del__(self, *args, **kwargs):
1130
try:
1131
self.remove_from_connection()
1132
except LookupError:
1133
pass
1134
if hasattr(DBusObjectWithProperties, "__del__"):
1135
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1136
Client.__del__(self, *args, **kwargs)
1137
1138
def checker_callback(self, pid, condition, command,
1139
*args, **kwargs):
1140
self.checker_callback_tag = None
1141
self.checker = None
1142
if os.WIFEXITED(condition):
1143
exitstatus = os.WEXITSTATUS(condition)
1144
# Emit D-Bus signal
1145
self.CheckerCompleted(dbus.Int16(exitstatus),
1146
dbus.Int64(condition),
1147
dbus.String(command))
1148
else:
1149
# Emit D-Bus signal
1150
self.CheckerCompleted(dbus.Int16(-1),
1151
dbus.Int64(condition),
1152
dbus.String(command))
1153
1154
return Client.checker_callback(self, pid, condition, command,
1155
*args, **kwargs)
1156
1157
def start_checker(self, *args, **kwargs):
1158
old_checker = self.checker
1159
if self.checker is not None:
1160
old_checker_pid = self.checker.pid
1161
else:
1162
old_checker_pid = None
1163
r = Client.start_checker(self, *args, **kwargs)
1164
# Only if new checker process was started
1165
if (self.checker is not None
1166
and old_checker_pid != self.checker.pid):
1167
# Emit D-Bus signal
1168
self.CheckerStarted(self.current_checker_command)
1169
return r
1170
1171
def _reset_approved(self):
1172
self.approved = None
1173
return False
1174
1175
def approve(self, value=True):
1176
self.send_changedstate()
1177
self.approved = value
1178
gobject.timeout_add(timedelta_to_milliseconds
1179
(self.approval_duration),
1180
self._reset_approved)
1181
1182
1183
## D-Bus methods, signals & properties
1184
_interface = "se.recompile.Mandos.Client"
1185
1186
## Signals
475
1187
476
1188
# CheckerCompleted - signal
477
@dbus.service.signal(_interface, signature="bqs")
478
def CheckerCompleted(self, success, condition, command):
1189
@dbus.service.signal(_interface, signature="nxs")
1190
def CheckerCompleted(self, exitcode, waitstatus, command):
479
1191
"D-Bus signal"
480
1192
pass
481
1193
485
1197
"D-Bus signal"
486
1198
pass
487
1199
488
# GetAllProperties - method
489
@dbus.service.method(_interface, out_signature="a{sv}")
490
def GetAllProperties(self):
491
"D-Bus method"
492
return dbus.Dictionary({
493
dbus.String("name"):
494
dbus.String(self.name, variant_level=1),
495
dbus.String("fingerprint"):
496
dbus.String(self.fingerprint, variant_level=1),
497
dbus.String("host"):
498
dbus.String(self.host, variant_level=1),
499
dbus.String("created"):
500
_datetime_to_dbus_struct(self.created,
501
variant_level=1),
502
dbus.String("last_started"):
503
(_datetime_to_dbus_struct(self.last_started,
504
variant_level=1)
505
if self.last_started is not None
506
else dbus.Boolean(False, variant_level=1)),
507
dbus.String("started"):
508
dbus.Boolean(self.started, variant_level=1),
509
dbus.String("last_checked_ok"):
510
(_datetime_to_dbus_struct(self.last_checked_ok,
511
variant_level=1)
512
if self.last_checked_ok is not None
513
else dbus.Boolean (False, variant_level=1)),
514
dbus.String("timeout"):
515
dbus.UInt64(self._timeout_milliseconds,
516
variant_level=1),
517
dbus.String("interval"):
518
dbus.UInt64(self._interval_milliseconds,
519
variant_level=1),
520
dbus.String("checker"):
521
dbus.String(self.checker_command,
522
variant_level=1),
523
dbus.String("checker_running"):
524
dbus.Boolean(self.checker is not None,
525
variant_level=1),
526
}, signature="sv")
527
528
# IsStillValid - method
529
IsStillValid = (dbus.service.method(_interface, out_signature="b")
530
(still_valid))
531
IsStillValid.__name__ = "IsStillValid"
532
533
1200
# PropertyChanged - signal
534
1201
@dbus.service.signal(_interface, signature="sv")
535
1202
def PropertyChanged(self, property, value):
536
1203
"D-Bus signal"
537
1204
pass
538
1205
539
# SetChecker - method
540
@dbus.service.method(_interface, in_signature="s")
541
def SetChecker(self, checker):
542
"D-Bus setter method"
543
self.checker_command = checker
544
545
# SetHost - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetHost(self, host):
548
"D-Bus setter method"
549
self.host = host
550
551
# SetInterval - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetInterval(self, milliseconds):
554
self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
555
556
# SetSecret - method
557
@dbus.service.method(_interface, in_signature="ay",
558
byte_arrays=True)
559
def SetSecret(self, secret):
560
"D-Bus setter method"
561
self.secret = str(secret)
562
563
# SetTimeout - method
564
@dbus.service.method(_interface, in_signature="t")
565
def SetTimeout(self, milliseconds):
566
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
567
568
# Start - method
569
Start = dbus.service.method(_interface)(start)
570
Start.__name__ = "Start"
1206
# GotSecret - signal
1207
@dbus.service.signal(_interface)
1208
def GotSecret(self):
1209
"""D-Bus signal
1210
Is sent after a successful transfer of secret from the Mandos
1211
server to mandos-client
1212
"""
1213
pass
1214
1215
# Rejected - signal
1216
@dbus.service.signal(_interface, signature="s")
1217
def Rejected(self, reason):
1218
"D-Bus signal"
1219
pass
1220
1221
# NeedApproval - signal
1222
@dbus.service.signal(_interface, signature="tb")
1223
def NeedApproval(self, timeout, default):
1224
"D-Bus signal"
1225
return self.need_approval()
1226
1227
## Methods
1228
1229
# Approve - method
1230
@dbus.service.method(_interface, in_signature="b")
1231
def Approve(self, value):
1232
self.approve(value)
1233
1234
# CheckedOK - method
1235
@dbus.service.method(_interface)
1236
def CheckedOK(self):
1237
self.checked_ok()
1238
1239
# Enable - method
1240
@dbus.service.method(_interface)
1241
def Enable(self):
1242
"D-Bus method"
1243
self.enable()
571
1244
572
1245
# StartChecker - method
573
1246
@dbus.service.method(_interface)
575
1248
"D-Bus method"
576
1249
self.start_checker()
577
1250
578
# Stop - method
1251
# Disable - method
579
1252
@dbus.service.method(_interface)
580
def Stop(self):
1253
def Disable(self):
581
1254
"D-Bus method"
582
self.stop()
1255
self.disable()
583
1256
584
1257
# StopChecker - method
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
1258
@dbus.service.method(_interface)
1259
def StopChecker(self):
1260
self.stop_checker()
1261
1262
## Properties
1263
1264
# ApprovalPending - property
1265
@dbus_service_property(_interface, signature="b", access="read")
1266
def ApprovalPending_dbus_property(self):
1267
return dbus.Boolean(bool(self.approvals_pending))
1268
1269
# ApprovedByDefault - property
1270
@dbus_service_property(_interface, signature="b",
1271
access="readwrite")
1272
def ApprovedByDefault_dbus_property(self, value=None):
1273
if value is None: # get
1274
return dbus.Boolean(self.approved_by_default)
1275
self.approved_by_default = bool(value)
1276
1277
# ApprovalDelay - property
1278
@dbus_service_property(_interface, signature="t",
1279
access="readwrite")
1280
def ApprovalDelay_dbus_property(self, value=None):
1281
if value is None: # get
1282
return dbus.UInt64(self.approval_delay_milliseconds())
1283
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1284
1285
# ApprovalDuration - property
1286
@dbus_service_property(_interface, signature="t",
1287
access="readwrite")
1288
def ApprovalDuration_dbus_property(self, value=None):
1289
if value is None: # get
1290
return dbus.UInt64(timedelta_to_milliseconds(
1291
self.approval_duration))
1292
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1293
1294
# Name - property
1295
@dbus_service_property(_interface, signature="s", access="read")
1296
def Name_dbus_property(self):
1297
return dbus.String(self.name)
1298
1299
# Fingerprint - property
1300
@dbus_service_property(_interface, signature="s", access="read")
1301
def Fingerprint_dbus_property(self):
1302
return dbus.String(self.fingerprint)
1303
1304
# Host - property
1305
@dbus_service_property(_interface, signature="s",
1306
access="readwrite")
1307
def Host_dbus_property(self, value=None):
1308
if value is None: # get
1309
return dbus.String(self.host)
1310
self.host = unicode(value)
1311
1312
# Created - property
1313
@dbus_service_property(_interface, signature="s", access="read")
1314
def Created_dbus_property(self):
1315
return datetime_to_dbus(self.created)
1316
1317
# LastEnabled - property
1318
@dbus_service_property(_interface, signature="s", access="read")
1319
def LastEnabled_dbus_property(self):
1320
return datetime_to_dbus(self.last_enabled)
1321
1322
# Enabled - property
1323
@dbus_service_property(_interface, signature="b",
1324
access="readwrite")
1325
def Enabled_dbus_property(self, value=None):
1326
if value is None: # get
1327
return dbus.Boolean(self.enabled)
1328
if value:
1329
self.enable()
1330
else:
1331
self.disable()
1332
1333
# LastCheckedOK - property
1334
@dbus_service_property(_interface, signature="s",
1335
access="readwrite")
1336
def LastCheckedOK_dbus_property(self, value=None):
1337
if value is not None:
1338
self.checked_ok()
1339
return
1340
return datetime_to_dbus(self.last_checked_ok)
1341
1342
# Expires - property
1343
@dbus_service_property(_interface, signature="s", access="read")
1344
def Expires_dbus_property(self):
1345
return datetime_to_dbus(self.expires)
1346
1347
# LastApprovalRequest - property
1348
@dbus_service_property(_interface, signature="s", access="read")
1349
def LastApprovalRequest_dbus_property(self):
1350
return datetime_to_dbus(self.last_approval_request)
1351
1352
# Timeout - property
1353
@dbus_service_property(_interface, signature="t",
1354
access="readwrite")
1355
def Timeout_dbus_property(self, value=None):
1356
if value is None: # get
1357
return dbus.UInt64(self.timeout_milliseconds())
1358
self.timeout = datetime.timedelta(0, 0, 0, value)
1359
# Reschedule timeout
1360
if self.enabled:
1361
now = datetime.datetime.utcnow()
1362
time_to_die = timedelta_to_milliseconds(
1363
(self.last_checked_ok + self.timeout) - now)
1364
if time_to_die <= 0:
1365
# The timeout has passed
1366
self.disable()
1367
else:
1368
self.expires = (now +
1369
datetime.timedelta(milliseconds =
1370
time_to_die))
1371
if (getattr(self, "disable_initiator_tag", None)
1372
is None):
1373
return
1374
gobject.source_remove(self.disable_initiator_tag)
1375
self.disable_initiator_tag = (gobject.timeout_add
1376
(time_to_die,
1377
self.disable))
1378
1379
# ExtendedTimeout - property
1380
@dbus_service_property(_interface, signature="t",
1381
access="readwrite")
1382
def ExtendedTimeout_dbus_property(self, value=None):
1383
if value is None: # get
1384
return dbus.UInt64(self.extended_timeout_milliseconds())
1385
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1386
1387
# Interval - property
1388
@dbus_service_property(_interface, signature="t",
1389
access="readwrite")
1390
def Interval_dbus_property(self, value=None):
1391
if value is None: # get
1392
return dbus.UInt64(self.interval_milliseconds())
1393
self.interval = datetime.timedelta(0, 0, 0, value)
1394
if getattr(self, "checker_initiator_tag", None) is None:
1395
return
1396
if self.enabled:
1397
# Reschedule checker run
1398
gobject.source_remove(self.checker_initiator_tag)
1399
self.checker_initiator_tag = (gobject.timeout_add
1400
(value, self.start_checker))
1401
self.start_checker() # Start one now, too
1402
1403
# Checker - property
1404
@dbus_service_property(_interface, signature="s",
1405
access="readwrite")
1406
def Checker_dbus_property(self, value=None):
1407
if value is None: # get
1408
return dbus.String(self.checker_command)
1409
self.checker_command = unicode(value)
1410
1411
# CheckerRunning - property
1412
@dbus_service_property(_interface, signature="b",
1413
access="readwrite")
1414
def CheckerRunning_dbus_property(self, value=None):
1415
if value is None: # get
1416
return dbus.Boolean(self.checker is not None)
1417
if value:
1418
self.start_checker()
1419
else:
1420
self.stop_checker()
1421
1422
# ObjectPath - property
1423
@dbus_service_property(_interface, signature="o", access="read")
1424
def ObjectPath_dbus_property(self):
1425
return self.dbus_object_path # is already a dbus.ObjectPath
1426
1427
# Secret = property
1428
@dbus_service_property(_interface, signature="ay",
1429
access="write", byte_arrays=True)
1430
def Secret_dbus_property(self, value):
1431
self.secret = str(value)
587
1432
588
1433
del _interface
589
1434
590
1435
591
def peer_certificate(session):
592
"Return the peer's OpenPGP certificate as a bytestring"
593
# If not an OpenPGP certificate...
594
if (gnutls.library.functions
595
.gnutls_certificate_type_get(session._c_object)
596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
# ...do the normal thing
598
return session.peer_certificate
599
list_size = ctypes.c_uint()
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
603
if list_size.value == 0:
604
return None
605
cert = cert_list[0]
606
return ctypes.string_at(cert.data, cert.size)
607
608
609
def fingerprint(openpgp):
610
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
611
# New GnuTLS "datum" with the OpenPGP public key
612
datum = (gnutls.library.types
613
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
614
ctypes.POINTER
615
(ctypes.c_ubyte)),
616
ctypes.c_uint(len(openpgp))))
617
# New empty GnuTLS certificate
618
crt = gnutls.library.types.gnutls_openpgp_crt_t()
619
(gnutls.library.functions
620
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
621
# Import the OpenPGP public key into the certificate
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
624
gnutls.library.constants
625
.GNUTLS_OPENPGP_FMT_RAW))
626
# Verify the self signature in the key
627
crtverify = ctypes.c_uint()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
630
if crtverify.value != 0:
631
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
632
raise gnutls.errors.CertificateSecurityError("Verify failed")
633
# New buffer for the fingerprint
634
buf = ctypes.create_string_buffer(20)
635
buf_len = ctypes.c_size_t()
636
# Get the fingerprint from the certificate into the buffer
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
639
ctypes.byref(buf_len)))
640
# Deinit the certificate
641
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
642
# Convert the buffer to a Python bytestring
643
fpr = ctypes.string_at(buf, buf_len.value)
644
# Convert the bytestring to hexadecimal notation
645
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
646
return hex_fpr
647
648
649
class TCP_handler(SocketServer.BaseRequestHandler, object):
650
"""A TCP request handler class.
651
Instantiated by IPv6_TCPServer for each request to handle it.
1436
class ProxyClient(object):
1437
def __init__(self, child_pipe, fpr, address):
1438
self._pipe = child_pipe
1439
self._pipe.send(('init', fpr, address))
1440
if not self._pipe.recv():
1441
raise KeyError()
1442
1443
def __getattribute__(self, name):
1444
if name == '_pipe':
1445
return super(ProxyClient, self).__getattribute__(name)
1446
self._pipe.send(('getattr', name))
1447
data = self._pipe.recv()
1448
if data[0] == 'data':
1449
return data[1]
1450
if data[0] == 'function':
1451
def func(*args, **kwargs):
1452
self._pipe.send(('funcall', name, args, kwargs))
1453
return self._pipe.recv()[1]
1454
return func
1455
1456
def __setattr__(self, name, value):
1457
if name == '_pipe':
1458
return super(ProxyClient, self).__setattr__(name, value)
1459
self._pipe.send(('setattr', name, value))
1460
1461
1462
class ClientDBusTransitional(ClientDBus):
1463
__metaclass__ = AlternateDBusNamesMetaclass
1464
1465
1466
class ClientHandler(socketserver.BaseRequestHandler, object):
1467
"""A class to handle client connections.
1468
1469
Instantiated once for each connection to handle it.
652
1470
Note: This will run in its own forked process."""
653
1471
654
1472
def handle(self):
655
logger.info(u"TCP connection from: %s",
656
unicode(self.client_address))
657
session = (gnutls.connection
658
.ClientSession(self.request,
659
gnutls.connection
660
.X509Credentials()))
661
662
line = self.request.makefile().readline()
663
logger.debug(u"Protocol version: %r", line)
664
try:
665
if int(line.strip().split()[0]) > 1:
666
raise RuntimeError
667
except (ValueError, IndexError, RuntimeError), error:
668
logger.error(u"Unknown protocol version: %s", error)
669
return
670
671
# Note: gnutls.connection.X509Credentials is really a generic
672
# GnuTLS certificate credentials object so long as no X.509
673
# keys are added to it. Therefore, we can use it here despite
674
# using OpenPGP certificates.
675
676
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
677
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
678
# "+DHE-DSS"))
679
# Use a fallback default, since this MUST be set.
680
priority = self.server.settings.get("priority", "NORMAL")
681
(gnutls.library.functions
682
.gnutls_priority_set_direct(session._c_object,
683
priority, None))
684
685
try:
686
session.handshake()
687
except gnutls.errors.GNUTLSError, error:
688
logger.warning(u"Handshake failed: %s", error)
689
# Do not run session.bye() here: the session is not
690
# established. Just abandon the request.
691
return
692
try:
693
fpr = fingerprint(peer_certificate(session))
694
except (TypeError, gnutls.errors.GNUTLSError), error:
695
logger.warning(u"Bad certificate: %s", error)
696
session.bye()
697
return
698
logger.debug(u"Fingerprint: %s", fpr)
699
for c in self.server.clients:
700
if c.fingerprint == fpr:
701
client = c
702
break
703
else:
704
logger.warning(u"Client not found for fingerprint: %s",
705
fpr)
706
session.bye()
707
return
708
# Have to check if client.still_valid(), since it is possible
709
# that the client timed out while establishing the GnuTLS
710
# session.
711
if not client.still_valid():
712
logger.warning(u"Client %(name)s is invalid",
713
vars(client))
714
session.bye()
715
return
716
## This won't work here, since we're in a fork.
717
# client.bump_timeout()
718
sent_size = 0
719
while sent_size < len(client.secret):
720
sent = session.send(client.secret[sent_size:])
721
logger.debug(u"Sent: %d, remaining: %d",
722
sent, len(client.secret)
723
- (sent_size + sent))
724
sent_size += sent
725
session.bye()
726
727
728
class IPv6_TCPServer(SocketServer.ForkingMixIn,
729
SocketServer.TCPServer, object):
730
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1473
with contextlib.closing(self.server.child_pipe) as child_pipe:
1474
logger.info("TCP connection from: %s",
1475
unicode(self.client_address))
1476
logger.debug("Pipe FD: %d",
1477
self.server.child_pipe.fileno())
1478
1479
session = (gnutls.connection
1480
.ClientSession(self.request,
1481
gnutls.connection
1482
.X509Credentials()))
1483
1484
# Note: gnutls.connection.X509Credentials is really a
1485
# generic GnuTLS certificate credentials object so long as
1486
# no X.509 keys are added to it. Therefore, we can use it
1487
# here despite using OpenPGP certificates.
1488
1489
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1490
# "+AES-256-CBC", "+SHA1",
1491
# "+COMP-NULL", "+CTYPE-OPENPGP",
1492
# "+DHE-DSS"))
1493
# Use a fallback default, since this MUST be set.
1494
priority = self.server.gnutls_priority
1495
if priority is None:
1496
priority = "NORMAL"
1497
(gnutls.library.functions
1498
.gnutls_priority_set_direct(session._c_object,
1499
priority, None))
1500
1501
# Start communication using the Mandos protocol
1502
# Get protocol number
1503
line = self.request.makefile().readline()
1504
logger.debug("Protocol version: %r", line)
1505
try:
1506
if int(line.strip().split()[0]) > 1:
1507
raise RuntimeError
1508
except (ValueError, IndexError, RuntimeError) as error:
1509
logger.error("Unknown protocol version: %s", error)
1510
return
1511
1512
# Start GnuTLS connection
1513
try:
1514
session.handshake()
1515
except gnutls.errors.GNUTLSError as error:
1516
logger.warning("Handshake failed: %s", error)
1517
# Do not run session.bye() here: the session is not
1518
# established. Just abandon the request.
1519
return
1520
logger.debug("Handshake succeeded")
1521
1522
approval_required = False
1523
try:
1524
try:
1525
fpr = self.fingerprint(self.peer_certificate
1526
(session))
1527
except (TypeError,
1528
gnutls.errors.GNUTLSError) as error:
1529
logger.warning("Bad certificate: %s", error)
1530
return
1531
logger.debug("Fingerprint: %s", fpr)
1532
1533
try:
1534
client = ProxyClient(child_pipe, fpr,
1535
self.client_address)
1536
except KeyError:
1537
return
1538
1539
if client.approval_delay:
1540
delay = client.approval_delay
1541
client.approvals_pending += 1
1542
approval_required = True
1543
1544
while True:
1545
if not client.enabled:
1546
logger.info("Client %s is disabled",
1547
client.name)
1548
if self.server.use_dbus:
1549
# Emit D-Bus signal
1550
client.Rejected("Disabled")
1551
return
1552
1553
if client.approved or not client.approval_delay:
1554
#We are approved or approval is disabled
1555
break
1556
elif client.approved is None:
1557
logger.info("Client %s needs approval",
1558
client.name)
1559
if self.server.use_dbus:
1560
# Emit D-Bus signal
1561
client.NeedApproval(
1562
client.approval_delay_milliseconds(),
1563
client.approved_by_default)
1564
else:
1565
logger.warning("Client %s was not approved",
1566
client.name)
1567
if self.server.use_dbus:
1568
# Emit D-Bus signal
1569
client.Rejected("Denied")
1570
return
1571
1572
#wait until timeout or approved
1573
time = datetime.datetime.now()
1574
client.changedstate.acquire()
1575
(client.changedstate.wait
1576
(float(client.timedelta_to_milliseconds(delay)
1577
/ 1000)))
1578
client.changedstate.release()
1579
time2 = datetime.datetime.now()
1580
if (time2 - time) >= delay:
1581
if not client.approved_by_default:
1582
logger.warning("Client %s timed out while"
1583
" waiting for approval",
1584
client.name)
1585
if self.server.use_dbus:
1586
# Emit D-Bus signal
1587
client.Rejected("Approval timed out")
1588
return
1589
else:
1590
break
1591
else:
1592
delay -= time2 - time
1593
1594
sent_size = 0
1595
while sent_size < len(client.secret):
1596
try:
1597
sent = session.send(client.secret[sent_size:])
1598
except gnutls.errors.GNUTLSError as error:
1599
logger.warning("gnutls send failed")
1600
return
1601
logger.debug("Sent: %d, remaining: %d",
1602
sent, len(client.secret)
1603
- (sent_size + sent))
1604
sent_size += sent
1605
1606
logger.info("Sending secret to %s", client.name)
1607
# bump the timeout using extended_timeout
1608
client.checked_ok(client.extended_timeout)
1609
if self.server.use_dbus:
1610
# Emit D-Bus signal
1611
client.GotSecret()
1612
1613
finally:
1614
if approval_required:
1615
client.approvals_pending -= 1
1616
try:
1617
session.bye()
1618
except gnutls.errors.GNUTLSError as error:
1619
logger.warning("GnuTLS bye failed")
1620
1621
@staticmethod
1622
def peer_certificate(session):
1623
"Return the peer's OpenPGP certificate as a bytestring"
1624
# If not an OpenPGP certificate...
1625
if (gnutls.library.functions
1626
.gnutls_certificate_type_get(session._c_object)
1627
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1628
# ...do the normal thing
1629
return session.peer_certificate
1630
list_size = ctypes.c_uint(1)
1631
cert_list = (gnutls.library.functions
1632
.gnutls_certificate_get_peers
1633
(session._c_object, ctypes.byref(list_size)))
1634
if not bool(cert_list) and list_size.value != 0:
1635
raise gnutls.errors.GNUTLSError("error getting peer"
1636
" certificate")
1637
if list_size.value == 0:
1638
return None
1639
cert = cert_list[0]
1640
return ctypes.string_at(cert.data, cert.size)
1641
1642
@staticmethod
1643
def fingerprint(openpgp):
1644
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1645
# New GnuTLS "datum" with the OpenPGP public key
1646
datum = (gnutls.library.types
1647
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1648
ctypes.POINTER
1649
(ctypes.c_ubyte)),
1650
ctypes.c_uint(len(openpgp))))
1651
# New empty GnuTLS certificate
1652
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1653
(gnutls.library.functions
1654
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1655
# Import the OpenPGP public key into the certificate
1656
(gnutls.library.functions
1657
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1658
gnutls.library.constants
1659
.GNUTLS_OPENPGP_FMT_RAW))
1660
# Verify the self signature in the key
1661
crtverify = ctypes.c_uint()
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_verify_self(crt, 0,
1664
ctypes.byref(crtverify)))
1665
if crtverify.value != 0:
1666
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1667
raise (gnutls.errors.CertificateSecurityError
1668
("Verify failed"))
1669
# New buffer for the fingerprint
1670
buf = ctypes.create_string_buffer(20)
1671
buf_len = ctypes.c_size_t()
1672
# Get the fingerprint from the certificate into the buffer
1673
(gnutls.library.functions
1674
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1675
ctypes.byref(buf_len)))
1676
# Deinit the certificate
1677
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1678
# Convert the buffer to a Python bytestring
1679
fpr = ctypes.string_at(buf, buf_len.value)
1680
# Convert the bytestring to hexadecimal notation
1681
hex_fpr = binascii.hexlify(fpr).upper()
1682
return hex_fpr
1683
1684
1685
class MultiprocessingMixIn(object):
1686
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1687
def sub_process_main(self, request, address):
1688
try:
1689
self.finish_request(request, address)
1690
except Exception:
1691
self.handle_error(request, address)
1692
self.close_request(request)
1693
1694
def process_request(self, request, address):
1695
"""Start a new process to process the request."""
1696
proc = multiprocessing.Process(target = self.sub_process_main,
1697
args = (request,
1698
address))
1699
proc.start()
1700
return proc
1701
1702
1703
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1704
""" adds a pipe to the MixIn """
1705
def process_request(self, request, client_address):
1706
"""Overrides and wraps the original process_request().
1707
1708
This function creates a new pipe in self.pipe
1709
"""
1710
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1711
1712
proc = MultiprocessingMixIn.process_request(self, request,
1713
client_address)
1714
self.child_pipe.close()
1715
self.add_pipe(parent_pipe, proc)
1716
1717
def add_pipe(self, parent_pipe, proc):
1718
"""Dummy function; override as necessary"""
1719
raise NotImplementedError
1720
1721
1722
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1723
socketserver.TCPServer, object):
1724
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1725
731
1726
Attributes:
732
settings: Server settings
733
clients: Set() of Client objects
734
1727
enabled: Boolean; whether this server is activated yet
1728
interface: None or a network interface name (string)
1729
use_ipv6: Boolean; to use IPv6 or not
735
1730
"""
736
address_family = socket.AF_INET6
737
def __init__(self, *args, **kwargs):
738
if "settings" in kwargs:
739
self.settings = kwargs["settings"]
740
del kwargs["settings"]
741
if "clients" in kwargs:
742
self.clients = kwargs["clients"]
743
del kwargs["clients"]
744
self.enabled = False
745
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1731
def __init__(self, server_address, RequestHandlerClass,
1732
interface=None, use_ipv6=True):
1733
self.interface = interface
1734
if use_ipv6:
1735
self.address_family = socket.AF_INET6
1736
socketserver.TCPServer.__init__(self, server_address,
1737
RequestHandlerClass)
746
1738
def server_bind(self):
747
1739
"""This overrides the normal server_bind() function
748
1740
to bind to an interface if one was specified, and also NOT to
749
1741
bind to an address or port if they were not specified."""
750
if self.settings["interface"]:
751
# 25 is from /usr/include/asm-i486/socket.h
752
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
753
try:
754
self.socket.setsockopt(socket.SOL_SOCKET,
755
SO_BINDTODEVICE,
756
self.settings["interface"])
757
except socket.error, error:
758
if error[0] == errno.EPERM:
759
logger.error(u"No permission to"
760
u" bind to interface %s",
761
self.settings["interface"])
762
else:
763
raise error
1742
if self.interface is not None:
1743
if SO_BINDTODEVICE is None:
1744
logger.error("SO_BINDTODEVICE does not exist;"
1745
" cannot bind to interface %s",
1746
self.interface)
1747
else:
1748
try:
1749
self.socket.setsockopt(socket.SOL_SOCKET,
1750
SO_BINDTODEVICE,
1751
str(self.interface
1752
+ '\0'))
1753
except socket.error as error:
1754
if error[0] == errno.EPERM:
1755
logger.error("No permission to"
1756
" bind to interface %s",
1757
self.interface)
1758
elif error[0] == errno.ENOPROTOOPT:
1759
logger.error("SO_BINDTODEVICE not available;"
1760
" cannot bind to interface %s",
1761
self.interface)
1762
else:
1763
raise
764
1764
# Only bind(2) the socket if we really need to.
765
1765
if self.server_address[0] or self.server_address[1]:
766
1766
if not self.server_address[0]:
767
in6addr_any = "::"
768
self.server_address = (in6addr_any,
1767
if self.address_family == socket.AF_INET6:
1768
any_address = "::" # in6addr_any
1769
else:
1770
any_address = socket.INADDR_ANY
1771
self.server_address = (any_address,
769
1772
self.server_address[1])
770
1773
elif not self.server_address[1]:
771
1774
self.server_address = (self.server_address[0],
772
1775
0)
773
# if self.settings["interface"]:
1776
# if self.interface:
774
1777
# self.server_address = (self.server_address[0],
775
1778
# 0, # port
776
1779
# 0, # flowinfo
777
1780
# if_nametoindex
778
# (self.settings
779
# ["interface"]))
780
return super(IPv6_TCPServer, self).server_bind()
1781
# (self.interface))
1782
return socketserver.TCPServer.server_bind(self)
1783
1784
1785
class MandosServer(IPv6_TCPServer):
1786
"""Mandos server.
1787
1788
Attributes:
1789
clients: set of Client objects
1790
gnutls_priority GnuTLS priority string
1791
use_dbus: Boolean; to emit D-Bus signals or not
1792
1793
Assumes a gobject.MainLoop event loop.
1794
"""
1795
def __init__(self, server_address, RequestHandlerClass,
1796
interface=None, use_ipv6=True, clients=None,
1797
gnutls_priority=None, use_dbus=True):
1798
self.enabled = False
1799
self.clients = clients
1800
if self.clients is None:
1801
self.clients = {}
1802
self.use_dbus = use_dbus
1803
self.gnutls_priority = gnutls_priority
1804
IPv6_TCPServer.__init__(self, server_address,
1805
RequestHandlerClass,
1806
interface = interface,
1807
use_ipv6 = use_ipv6)
781
1808
def server_activate(self):
782
1809
if self.enabled:
783
return super(IPv6_TCPServer, self).server_activate()
1810
return socketserver.TCPServer.server_activate(self)
1811
784
1812
def enable(self):
785
1813
self.enabled = True
1814
1815
def add_pipe(self, parent_pipe, proc):
1816
# Call "handle_ipc" for both data and EOF events
1817
gobject.io_add_watch(parent_pipe.fileno(),
1818
gobject.IO_IN | gobject.IO_HUP,
1819
functools.partial(self.handle_ipc,
1820
parent_pipe =
1821
parent_pipe,
1822
proc = proc))
1823
1824
def handle_ipc(self, source, condition, parent_pipe=None,
1825
proc = None, client_object=None):
1826
condition_names = {
1827
gobject.IO_IN: "IN", # There is data to read.
1828
gobject.IO_OUT: "OUT", # Data can be written (without
1829
# blocking).
1830
gobject.IO_PRI: "PRI", # There is urgent data to read.
1831
gobject.IO_ERR: "ERR", # Error condition.
1832
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1833
# broken, usually for pipes and
1834
# sockets).
1835
}
1836
conditions_string = ' | '.join(name
1837
for cond, name in
1838
condition_names.iteritems()
1839
if cond & condition)
1840
# error, or the other end of multiprocessing.Pipe has closed
1841
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1842
# Wait for other process to exit
1843
proc.join()
1844
return False
1845
1846
# Read a request from the child
1847
request = parent_pipe.recv()
1848
command = request[0]
1849
1850
if command == 'init':
1851
fpr = request[1]
1852
address = request[2]
1853
1854
for c in self.clients.itervalues():
1855
if c.fingerprint == fpr:
1856
client = c
1857
break
1858
else:
1859
logger.info("Client not found for fingerprint: %s, ad"
1860
"dress: %s", fpr, address)
1861
if self.use_dbus:
1862
# Emit D-Bus signal
1863
mandos_dbus_service.ClientNotFound(fpr,
1864
address[0])
1865
parent_pipe.send(False)
1866
return False
1867
1868
gobject.io_add_watch(parent_pipe.fileno(),
1869
gobject.IO_IN | gobject.IO_HUP,
1870
functools.partial(self.handle_ipc,
1871
parent_pipe =
1872
parent_pipe,
1873
proc = proc,
1874
client_object =
1875
client))
1876
parent_pipe.send(True)
1877
# remove the old hook in favor of the new above hook on
1878
# same fileno
1879
return False
1880
if command == 'funcall':
1881
funcname = request[1]
1882
args = request[2]
1883
kwargs = request[3]
1884
1885
parent_pipe.send(('data', getattr(client_object,
1886
funcname)(*args,
1887
**kwargs)))
1888
1889
if command == 'getattr':
1890
attrname = request[1]
1891
if callable(client_object.__getattribute__(attrname)):
1892
parent_pipe.send(('function',))
1893
else:
1894
parent_pipe.send(('data', client_object
1895
.__getattribute__(attrname)))
1896
1897
if command == 'setattr':
1898
attrname = request[1]
1899
value = request[2]
1900
setattr(client_object, attrname, value)
1901
1902
return True
786
1903
787
1904
788
1905
def string_to_delta(interval):
789
1906
"""Parse a string and return a datetime.timedelta
790
1907
791
1908
>>> string_to_delta('7d')
792
1909
datetime.timedelta(7)
793
1910
>>> string_to_delta('60s')
796
1913
datetime.timedelta(0, 3600)
797
1914
>>> string_to_delta('24h')
798
1915
datetime.timedelta(1)
799
>>> string_to_delta(u'1w')
1916
>>> string_to_delta('1w')
800
1917
datetime.timedelta(7)
801
1918
>>> string_to_delta('5m 30s')
802
1919
datetime.timedelta(0, 330)
806
1923
try:
807
1924
suffix = unicode(s[-1])
808
1925
value = int(s[:-1])
809
if suffix == u"d":
1926
if suffix == "d":
810
1927
delta = datetime.timedelta(value)
811
elif suffix == u"s":
1928
elif suffix == "s":
812
1929
delta = datetime.timedelta(0, value)
813
elif suffix == u"m":
1930
elif suffix == "m":
814
1931
delta = datetime.timedelta(0, 0, 0, 0, value)
815
elif suffix == u"h":
1932
elif suffix == "h":
816
1933
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
817
elif suffix == u"w":
1934
elif suffix == "w":
818
1935
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
819
1936
else:
820
raise ValueError
821
except (ValueError, IndexError):
822
raise ValueError
1937
raise ValueError("Unknown suffix %r" % suffix)
1938
except (ValueError, IndexError) as e:
1939
raise ValueError(*(e.args))
823
1940
timevalue += delta
824
1941
return timevalue
825
1942
826
1943
827
def server_state_changed(state):
828
"""Derived from the Avahi example code"""
829
if state == avahi.SERVER_COLLISION:
830
logger.error(u"Zeroconf server name collision")
831
service.remove()
832
elif state == avahi.SERVER_RUNNING:
833
service.add()
834
835
836
def entry_group_state_changed(state, error):
837
"""Derived from the Avahi example code"""
838
logger.debug(u"Avahi state change: %i", state)
839
840
if state == avahi.ENTRY_GROUP_ESTABLISHED:
841
logger.debug(u"Zeroconf service established.")
842
elif state == avahi.ENTRY_GROUP_COLLISION:
843
logger.warning(u"Zeroconf service name collision.")
844
service.rename()
845
elif state == avahi.ENTRY_GROUP_FAILURE:
846
logger.critical(u"Avahi: Error in group state changed %s",
847
unicode(error))
848
raise AvahiGroupError("State changed: %s", str(error))
849
850
def if_nametoindex(interface):
851
"""Call the C function if_nametoindex(), or equivalent"""
852
global if_nametoindex
853
try:
854
if_nametoindex = (ctypes.cdll.LoadLibrary
855
(ctypes.util.find_library("c"))
856
.if_nametoindex)
857
except (OSError, AttributeError):
858
if "struct" not in sys.modules:
859
import struct
860
if "fcntl" not in sys.modules:
861
import fcntl
862
def if_nametoindex(interface):
863
"Get an interface index the hard way, i.e. using fcntl()"
864
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
865
with closing(socket.socket()) as s:
866
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
867
struct.pack("16s16x", interface))
868
interface_index = struct.unpack("I", ifreq[16:20])[0]
869
return interface_index
870
return if_nametoindex(interface)
871
872
873
1944
def daemon(nochdir = False, noclose = False):
874
1945
"""See daemon(3). Standard BSD Unix function.
1946
875
1947
This should really exist as os.daemon, but it doesn't (yet)."""
876
1948
if os.fork():
877
1949
sys.exit()
885
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
886
1958
if not stat.S_ISCHR(os.fstat(null).st_mode):
887
1959
raise OSError(errno.ENODEV,
888
"/dev/null not a character device")
1960
"%s not a character device"
1961
% os.path.devnull)
889
1962
os.dup2(null, sys.stdin.fileno())
890
1963
os.dup2(null, sys.stdout.fileno())
891
1964
os.dup2(null, sys.stderr.fileno())
894
1967
895
1968
896
1969
def main():
897
parser = OptionParser(version = "%%prog %s" % version)
898
parser.add_option("-i", "--interface", type="string",
899
metavar="IF", help="Bind to interface IF")
900
parser.add_option("-a", "--address", type="string",
901
help="Address to listen for requests on")
902
parser.add_option("-p", "--port", type="int",
903
help="Port number to receive requests on")
904
parser.add_option("--check", action="store_true", default=False,
905
help="Run self-test")
906
parser.add_option("--debug", action="store_true",
907
help="Debug mode; run in foreground and log to"
908
" terminal")
909
parser.add_option("--priority", type="string", help="GnuTLS"
910
" priority string (see GnuTLS documentation)")
911
parser.add_option("--servicename", type="string", metavar="NAME",
912
help="Zeroconf service name")
913
parser.add_option("--configdir", type="string",
914
default="/etc/mandos", metavar="DIR",
915
help="Directory to search for configuration"
916
" files")
917
options = parser.parse_args()[0]
1970
1971
##################################################################
1972
# Parsing of options, both command line and config file
1973
1974
parser = argparse.ArgumentParser()
1975
parser.add_argument("-v", "--version", action="version",
1976
version = "%%(prog)s %s" % version,
1977
help="show version number and exit")
1978
parser.add_argument("-i", "--interface", metavar="IF",
1979
help="Bind to interface IF")
1980
parser.add_argument("-a", "--address",
1981
help="Address to listen for requests on")
1982
parser.add_argument("-p", "--port", type=int,
1983
help="Port number to receive requests on")
1984
parser.add_argument("--check", action="store_true",
1985
help="Run self-test")
1986
parser.add_argument("--debug", action="store_true",
1987
help="Debug mode; run in foreground and log"
1988
" to terminal")
1989
parser.add_argument("--debuglevel", metavar="LEVEL",
1990
help="Debug level for stdout output")
1991
parser.add_argument("--priority", help="GnuTLS"
1992
" priority string (see GnuTLS documentation)")
1993
parser.add_argument("--servicename",
1994
metavar="NAME", help="Zeroconf service name")
1995
parser.add_argument("--configdir",
1996
default="/etc/mandos", metavar="DIR",
1997
help="Directory to search for configuration"
1998
" files")
1999
parser.add_argument("--no-dbus", action="store_false",
2000
dest="use_dbus", help="Do not provide D-Bus"
2001
" system bus interface")
2002
parser.add_argument("--no-ipv6", action="store_false",
2003
dest="use_ipv6", help="Do not use IPv6")
2004
parser.add_argument("--no-restore", action="store_false",
2005
dest="restore", help="Do not restore stored"
2006
" state")
2007
parser.add_argument("--statedir", metavar="DIR",
2008
help="Directory to save/restore state in")
2009
2010
options = parser.parse_args()
918
2011
919
2012
if options.check:
920
2013
import doctest
929
2022
"priority":
930
2023
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
931
2024
"servicename": "Mandos",
2025
"use_dbus": "True",
2026
"use_ipv6": "True",
2027
"debuglevel": "",
2028
"restore": "True",
2029
"statedir": "/var/lib/mandos"
932
2030
}
933
2031
934
2032
# Parse config file for server-global settings
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
2033
server_config = configparser.SafeConfigParser(server_defaults)
936
2034
del server_defaults
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2035
server_config.read(os.path.join(options.configdir,
2036
"mandos.conf"))
938
2037
# Convert the SafeConfigParser object to a dict
939
2038
server_settings = server_config.defaults()
940
# Use getboolean on the boolean config option
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
2039
# Use the appropriate methods on the non-string config options
2040
for option in ("debug", "use_dbus", "use_ipv6"):
2041
server_settings[option] = server_config.getboolean("DEFAULT",
2042
option)
2043
if server_settings["port"]:
2044
server_settings["port"] = server_config.getint("DEFAULT",
2045
"port")
943
2046
del server_config
944
2047
945
2048
# Override the settings from the config file with command line
946
2049
# options, if set.
947
2050
for option in ("interface", "address", "port", "debug",
948
"priority", "servicename", "configdir"):
2051
"priority", "servicename", "configdir",
2052
"use_dbus", "use_ipv6", "debuglevel", "restore",
2053
"statedir"):
949
2054
value = getattr(options, option)
950
2055
if value is not None:
951
2056
server_settings[option] = value
952
2057
del options
2058
# Force all strings to be unicode
2059
for option in server_settings.keys():
2060
if type(server_settings[option]) is str:
2061
server_settings[option] = unicode(server_settings[option])
953
2062
# Now we have our good server settings in "server_settings"
954
2063
2064
##################################################################
2065
2066
# For convenience
955
2067
debug = server_settings["debug"]
2068
debuglevel = server_settings["debuglevel"]
2069
use_dbus = server_settings["use_dbus"]
2070
use_ipv6 = server_settings["use_ipv6"]
2071
stored_state_path = os.path.join(server_settings["statedir"],
2072
stored_state_file)
956
2073
957
if not debug:
958
syslogger.setLevel(logging.WARNING)
959
console.setLevel(logging.WARNING)
2074
if debug:
2075
initlogger(debug, logging.DEBUG)
2076
else:
2077
if not debuglevel:
2078
initlogger(debug)
2079
else:
2080
level = getattr(logging, debuglevel.upper())
2081
initlogger(debug, level)
960
2082
961
2083
if server_settings["servicename"] != "Mandos":
962
2084
syslogger.setFormatter(logging.Formatter
963
('Mandos (%s): %%(levelname)s:'
964
' %%(message)s'
2085
('Mandos (%s) [%%(process)d]:'
2086
' %%(levelname)s: %%(message)s'
965
2087
% server_settings["servicename"]))
966
2088
967
2089
# Parse config file with clients
968
client_defaults = { "timeout": "1h",
969
"interval": "5m",
970
"checker": "fping -q -- %(host)s",
971
"host": "",
972
}
973
client_config = ConfigParser.SafeConfigParser(client_defaults)
2090
client_config = configparser.SafeConfigParser(Client
2091
.client_defaults)
974
2092
client_config.read(os.path.join(server_settings["configdir"],
975
2093
"clients.conf"))
976
2094
977
clients = Set()
978
tcp_server = IPv6_TCPServer((server_settings["address"],
979
server_settings["port"]),
980
TCP_handler,
981
settings=server_settings,
982
clients=clients)
983
pidfilename = "/var/run/mandos.pid"
984
try:
985
pidfile = open(pidfilename, "w")
986
except IOError, error:
987
logger.error("Could not open file %r", pidfilename)
2095
global mandos_dbus_service
2096
mandos_dbus_service = None
2097
2098
tcp_server = MandosServer((server_settings["address"],
2099
server_settings["port"]),
2100
ClientHandler,
2101
interface=(server_settings["interface"]
2102
or None),
2103
use_ipv6=use_ipv6,
2104
gnutls_priority=
2105
server_settings["priority"],
2106
use_dbus=use_dbus)
2107
if not debug:
2108
pidfilename = "/var/run/mandos.pid"
2109
try:
2110
pidfile = open(pidfilename, "w")
2111
except IOError:
2112
logger.error("Could not open file %r", pidfilename)
988
2113
989
2114
try:
990
2115
uid = pwd.getpwnam("_mandos").pw_uid
2116
gid = pwd.getpwnam("_mandos").pw_gid
991
2117
except KeyError:
992
2118
try:
993
2119
uid = pwd.getpwnam("mandos").pw_uid
2120
gid = pwd.getpwnam("mandos").pw_gid
994
2121
except KeyError:
995
2122
try:
996
2123
uid = pwd.getpwnam("nobody").pw_uid
2124
gid = pwd.getpwnam("nobody").pw_gid
997
2125
except KeyError:
998
2126
uid = 65534
999
try:
1000
gid = pwd.getpwnam("_mandos").pw_gid
1001
except KeyError:
1002
try:
1003
gid = pwd.getpwnam("mandos").pw_gid
1004
except KeyError:
1005
try:
1006
gid = pwd.getpwnam("nogroup").pw_gid
1007
except KeyError:
1008
2127
gid = 65534
1009
2128
try:
2129
os.setgid(gid)
1010
2130
os.setuid(uid)
1011
os.setgid(gid)
1012
except OSError, error:
2131
except OSError as error:
1013
2132
if error[0] != errno.EPERM:
1014
2133
raise error
1015
2134
1016
global service
1017
service = AvahiService(name = server_settings["servicename"],
1018
servicetype = "_mandos._tcp", )
1019
if server_settings["interface"]:
1020
service.interface = (if_nametoindex
1021
(server_settings["interface"]))
2135
if debug:
2136
# Enable all possible GnuTLS debugging
2137
2138
# "Use a log level over 10 to enable all debugging options."
2139
# - GnuTLS manual
2140
gnutls.library.functions.gnutls_global_set_log_level(11)
2141
2142
@gnutls.library.types.gnutls_log_func
2143
def debug_gnutls(level, string):
2144
logger.debug("GnuTLS: %s", string[:-1])
2145
2146
(gnutls.library.functions
2147
.gnutls_global_set_log_function(debug_gnutls))
2148
2149
# Redirect stdin so all checkers get /dev/null
2150
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2151
os.dup2(null, sys.stdin.fileno())
2152
if null > 2:
2153
os.close(null)
2154
2155
# Need to fork before connecting to D-Bus
2156
if not debug:
2157
# Close all input and output, do double fork, etc.
2158
daemon()
2159
2160
gobject.threads_init()
1022
2161
1023
2162
global main_loop
1024
global bus
1025
global server
1026
2163
# From the Avahi example code
1027
2164
DBusGMainLoop(set_as_default=True )
1028
2165
main_loop = gobject.MainLoop()
1029
2166
bus = dbus.SystemBus()
1030
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1031
avahi.DBUS_PATH_SERVER),
1032
avahi.DBUS_INTERFACE_SERVER)
1033
2167
# End of Avahi example code
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos", bus)
1035
1036
clients.update(Set(Client(name = section,
1037
config
1038
= dict(client_config.items(section)))
1039
for section in client_config.sections()))
1040
if not clients:
1041
logger.critical(u"No clients defined")
1042
sys.exit(1)
1043
1044
if debug:
1045
# Redirect stdin so all checkers get /dev/null
1046
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1047
os.dup2(null, sys.stdin.fileno())
1048
if null > 2:
1049
os.close(null)
1050
else:
1051
# No console logging
1052
logger.removeHandler(console)
1053
# Close all input and output, do double fork, etc.
1054
daemon()
1055
1056
try:
1057
pid = os.getpid()
1058
pidfile.write(str(pid) + "\n")
1059
pidfile.close()
1060
del pidfile
1061
except IOError:
1062
logger.error(u"Could not write to file %r with PID %d",
1063
pidfilename, pid)
1064
except NameError:
1065
# "pidfile" was never created
1066
pass
1067
del pidfilename
2168
if use_dbus:
2169
try:
2170
bus_name = dbus.service.BusName("se.recompile.Mandos",
2171
bus, do_not_queue=True)
2172
old_bus_name = (dbus.service.BusName
2173
("se.bsnet.fukt.Mandos", bus,
2174
do_not_queue=True))
2175
except dbus.exceptions.NameExistsException as e:
2176
logger.error(unicode(e) + ", disabling D-Bus")
2177
use_dbus = False
2178
server_settings["use_dbus"] = False
2179
tcp_server.use_dbus = False
2180
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2181
service = AvahiServiceToSyslog(name =
2182
server_settings["servicename"],
2183
servicetype = "_mandos._tcp",
2184
protocol = protocol, bus = bus)
2185
if server_settings["interface"]:
2186
service.interface = (if_nametoindex
2187
(str(server_settings["interface"])))
2188
2189
global multiprocessing_manager
2190
multiprocessing_manager = multiprocessing.Manager()
2191
2192
client_class = Client
2193
if use_dbus:
2194
client_class = functools.partial(ClientDBusTransitional,
2195
bus = bus)
2196
2197
client_settings = Client.config_parser(client_config)
2198
old_client_settings = {}
2199
clients_data = {}
2200
2201
# Get client data and settings from last running state.
2202
if server_settings["restore"]:
2203
try:
2204
with open(stored_state_path, "rb") as stored_state:
2205
clients_data, old_client_settings = (pickle.load
2206
(stored_state))
2207
os.remove(stored_state_path)
2208
except IOError as e:
2209
logger.warning("Could not load persistent state: {0}"
2210
.format(e))
2211
if e.errno != errno.ENOENT:
2212
raise
2213
except EOFError as e:
2214
logger.warning("Could not load persistent state: "
2215
"EOFError: {0}".format(e))
2216
2217
with PGPEngine() as pgp:
2218
for client_name, client in clients_data.iteritems():
2219
# Decide which value to use after restoring saved state.
2220
# We have three different values: Old config file,
2221
# new config file, and saved state.
2222
# New config value takes precedence if it differs from old
2223
# config value, otherwise use saved state.
2224
for name, value in client_settings[client_name].items():
2225
try:
2226
# For each value in new config, check if it
2227
# differs from the old config value (Except for
2228
# the "secret" attribute)
2229
if (name != "secret" and
2230
value != old_client_settings[client_name]
2231
[name]):
2232
client[name] = value
2233
except KeyError:
2234
pass
2235
2236
# Clients who has passed its expire date can still be
2237
# enabled if its last checker was successful. Clients
2238
# whose checker succeeded before we stored its state is
2239
# assumed to have successfully run all checkers during
2240
# downtime.
2241
if client["enabled"]:
2242
if datetime.datetime.utcnow() >= client["expires"]:
2243
if not client["last_checked_ok"]:
2244
logger.warning(
2245
"disabling client {0} - Client never "
2246
"performed a successful checker"
2247
.format(client_name))
2248
client["enabled"] = False
2249
elif client["last_checker_status"] != 0:
2250
logger.warning(
2251
"disabling client {0} - Client "
2252
"last checker failed with error code {1}"
2253
.format(client_name,
2254
client["last_checker_status"]))
2255
client["enabled"] = False
2256
else:
2257
client["expires"] = (datetime.datetime
2258
.utcnow()
2259
+ client["timeout"])
2260
logger.debug("Last checker succeeded,"
2261
" keeping {0} enabled"
2262
.format(client_name))
2263
try:
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
2267
["secret"]))
2268
except PGPError:
2269
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
2274
2275
2276
# Add/remove clients based on new changes made to config
2277
for client_name in (set(old_client_settings)
2278
- set(client_settings)):
2279
del clients_data[client_name]
2280
for client_name in (set(client_settings)
2281
- set(old_client_settings)):
2282
clients_data[client_name] = client_settings[client_name]
2283
2284
# Create all client objects
2285
for client_name, client in clients_data.iteritems():
2286
tcp_server.clients[client_name] = client_class(
2287
name = client_name, settings = client)
2288
2289
if not tcp_server.clients:
2290
logger.warning("No clients defined")
2291
2292
if not debug:
2293
try:
2294
with pidfile:
2295
pid = os.getpid()
2296
pidfile.write(str(pid) + "\n".encode("utf-8"))
2297
del pidfile
2298
except IOError:
2299
logger.error("Could not write to file %r with PID %d",
2300
pidfilename, pid)
2301
except NameError:
2302
# "pidfile" was never created
2303
pass
2304
del pidfilename
2305
signal.signal(signal.SIGINT, signal.SIG_IGN)
2306
2307
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2308
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2309
2310
if use_dbus:
2311
class MandosDBusService(dbus.service.Object):
2312
"""A D-Bus proxy object"""
2313
def __init__(self):
2314
dbus.service.Object.__init__(self, bus, "/")
2315
_interface = "se.recompile.Mandos"
2316
2317
@dbus.service.signal(_interface, signature="o")
2318
def ClientAdded(self, objpath):
2319
"D-Bus signal"
2320
pass
2321
2322
@dbus.service.signal(_interface, signature="ss")
2323
def ClientNotFound(self, fingerprint, address):
2324
"D-Bus signal"
2325
pass
2326
2327
@dbus.service.signal(_interface, signature="os")
2328
def ClientRemoved(self, objpath, name):
2329
"D-Bus signal"
2330
pass
2331
2332
@dbus.service.method(_interface, out_signature="ao")
2333
def GetAllClients(self):
2334
"D-Bus method"
2335
return dbus.Array(c.dbus_object_path
2336
for c in
2337
tcp_server.clients.itervalues())
2338
2339
@dbus.service.method(_interface,
2340
out_signature="a{oa{sv}}")
2341
def GetAllClientsWithProperties(self):
2342
"D-Bus method"
2343
return dbus.Dictionary(
2344
((c.dbus_object_path, c.GetAll(""))
2345
for c in tcp_server.clients.itervalues()),
2346
signature="oa{sv}")
2347
2348
@dbus.service.method(_interface, in_signature="o")
2349
def RemoveClient(self, object_path):
2350
"D-Bus method"
2351
for c in tcp_server.clients.itervalues():
2352
if c.dbus_object_path == object_path:
2353
del tcp_server.clients[c.name]
2354
c.remove_from_connection()
2355
# Don't signal anything except ClientRemoved
2356
c.disable(quiet=True)
2357
# Emit D-Bus signal
2358
self.ClientRemoved(object_path, c.name)
2359
return
2360
raise KeyError(object_path)
2361
2362
del _interface
2363
2364
class MandosDBusServiceTransitional(MandosDBusService):
2365
__metaclass__ = AlternateDBusNamesMetaclass
2366
mandos_dbus_service = MandosDBusServiceTransitional()
1068
2367
1069
2368
def cleanup():
1070
2369
"Cleanup function; run on exit"
1071
global group
1072
# From the Avahi example code
1073
if not group is None:
1074
group.Free()
1075
group = None
1076
# End of Avahi example code
1077
1078
while clients:
1079
client = clients.pop()
1080
client.stop_hook = None
1081
client.stop()
2370
service.cleanup()
2371
2372
multiprocessing.active_children()
2373
if not (tcp_server.clients or client_settings):
2374
return
2375
2376
# Store client before exiting. Secrets are encrypted with key
2377
# based on what config file has. If config file is
2378
# removed/edited, old secret will thus be unrecovable.
2379
clients = {}
2380
with PGPEngine() as pgp:
2381
for client in tcp_server.clients.itervalues():
2382
key = client_settings[client.name]["secret"]
2383
client.encrypted_secret = pgp.encrypt(client.secret,
2384
key)
2385
client_dict = {}
2386
2387
# A list of attributes that can not be pickled
2388
# + secret.
2389
exclude = set(("bus", "changedstate", "secret",
2390
"checker"))
2391
for name, typ in (inspect.getmembers
2392
(dbus.service.Object)):
2393
exclude.add(name)
2394
2395
client_dict["encrypted_secret"] = (client
2396
.encrypted_secret)
2397
for attr in client.client_structure:
2398
if attr not in exclude:
2399
client_dict[attr] = getattr(client, attr)
2400
2401
clients[client.name] = client_dict
2402
del client_settings[client.name]["secret"]
2403
2404
try:
2405
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2406
prefix="clients-",
2407
dir=os.path.dirname
2408
(stored_state_path))
2409
with os.fdopen(tempfd, "wb") as stored_state:
2410
pickle.dump((clients, client_settings), stored_state)
2411
os.rename(tempname, stored_state_path)
2412
except (IOError, OSError) as e:
2413
logger.warning("Could not save persistent state: {0}"
2414
.format(e))
2415
if not debug:
2416
try:
2417
os.remove(tempname)
2418
except NameError:
2419
pass
2420
if e.errno not in set((errno.ENOENT, errno.EACCES,
2421
errno.EEXIST)):
2422
raise e
2423
2424
# Delete all clients, and settings from config
2425
while tcp_server.clients:
2426
name, client = tcp_server.clients.popitem()
2427
if use_dbus:
2428
client.remove_from_connection()
2429
# Don't signal anything except ClientRemoved
2430
client.disable(quiet=True)
2431
if use_dbus:
2432
# Emit D-Bus signal
2433
mandos_dbus_service.ClientRemoved(client
2434
.dbus_object_path,
2435
client.name)
2436
client_settings.clear()
1082
2437
1083
2438
atexit.register(cleanup)
1084
2439
1085
if not debug:
1086
signal.signal(signal.SIGINT, signal.SIG_IGN)
1087
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1088
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1089
1090
class MandosServer(dbus.service.Object):
1091
"""A D-Bus proxy object"""
1092
def __init__(self):
1093
dbus.service.Object.__init__(self, bus,
1094
"/Mandos")
1095
_interface = u"org.mandos_system.Mandos"
1096
1097
@dbus.service.signal(_interface, signature="oa{sv}")
1098
def ClientAdded(self, objpath, properties):
1099
"D-Bus signal"
1100
pass
1101
1102
@dbus.service.signal(_interface, signature="o")
1103
def ClientRemoved(self, objpath):
1104
"D-Bus signal"
1105
pass
1106
1107
@dbus.service.method(_interface, out_signature="ao")
1108
def GetAllClients(self):
1109
return dbus.Array(c.dbus_object_path for c in clients)
1110
1111
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1112
def GetAllClientsWithProperties(self):
1113
return dbus.Dictionary(
1114
((c.dbus_object_path, c.GetAllProperties())
1115
for c in clients),
1116
signature="oa{sv}")
1117
1118
@dbus.service.method(_interface, in_signature="o")
1119
def RemoveClient(self, object_path):
1120
for c in clients:
1121
if c.dbus_object_path == object_path:
1122
c.stop()
1123
clients.remove(c)
1124
return
1125
raise KeyError
1126
1127
del _interface
1128
1129
mandos_server = MandosServer()
1130
1131
for client in clients:
1132
# Emit D-Bus signal
1133
mandos_server.ClientAdded(client.dbus_object_path,
1134
client.GetAllProperties())
1135
client.start()
2440
for client in tcp_server.clients.itervalues():
2441
if use_dbus:
2442
# Emit D-Bus signal
2443
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2444
# Need to initiate checking of clients
2445
if client.enabled:
2446
client.init_checker()
1136
2447
1137
2448
tcp_server.enable()
1138
2449
tcp_server.server_activate()
1139
2450
1140
2451
# Find out what port we got
1141
2452
service.port = tcp_server.socket.getsockname()[1]
1142
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1143
u" scope_id %d" % tcp_server.socket.getsockname())
2453
if use_ipv6:
2454
logger.info("Now listening on address %r, port %d,"
2455
" flowinfo %d, scope_id %d"
2456
% tcp_server.socket.getsockname())
2457
else: # IPv4
2458
logger.info("Now listening on address %r, port %d"
2459
% tcp_server.socket.getsockname())
1144
2460
1145
2461
#service.interface = tcp_server.socket.getsockname()[3]
1146
2462
1147
2463
try:
1148
2464
# From the Avahi example code
1149
server.connect_to_signal("StateChanged", server_state_changed)
1150
2465
try:
1151
server_state_changed(server.GetState())
1152
except dbus.exceptions.DBusException, error:
1153
logger.critical(u"DBusException: %s", error)
2466
service.activate()
2467
except dbus.exceptions.DBusException as error:
2468
logger.critical("DBusException: %s", error)
2469
cleanup()
1154
2470
sys.exit(1)
1155
2471
# End of Avahi example code
1156
2472
1159
2475
(tcp_server.handle_request
1160
2476
(*args[2:], **kwargs) or True))
1161
2477
1162
logger.debug(u"Starting main loop")
2478
logger.debug("Starting main loop")
1163
2479
main_loop.run()
1164
except AvahiError, error:
1165
logger.critical(u"AvahiError: %s" + unicode(error))
2480
except AvahiError as error:
2481
logger.critical("AvahiError: %s", error)
2482
cleanup()
1166
2483
sys.exit(1)
1167
2484
except KeyboardInterrupt:
1168
2485
if debug:
1169
print
2486
print("", file=sys.stderr)
2487
logger.debug("Server received KeyboardInterrupt")
2488
logger.debug("Server exiting")
2489
# Must run before the D-Bus bus name gets deregistered
2490
cleanup()
1170
2491
1171
2492
if __name__ == '__main__':
1172
2493
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0