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- Committer: Teddy Hogeborn
- Date: 2015-03-10 18:03:38 UTC
- Revision ID: teddy@recompile.se-20150310180338-pcxw6r2qmw9k6br9
Add ":!RSA" to GnuTLS priority string, to disallow non-DHE kx.
If Mandos was somehow made to use a non-ephemeral Diffie-Hellman key
exchange algorithm in the TLS handshake, any saved network traffic
could then be decrypted later if the Mandos client key was obtained.
By default, Mandos uses ephemeral DH key exchanges which does not have
this problem, but a non-ephemeral key exchange algorithm was still
enabled by default. The simplest solution is to simply turn that off,
which ensures that Mandos will always use ephemeral DH key exchanges.
There is a "PFS" priority string specifier, but we can't use it because:
1. Security-wise, it is a mix between "NORMAL" and "SECURE128" - it
enables a lot more algorithms than "SECURE256".
2. It is only available since GnuTLS 3.2.4.
Thanks to Andreas Fischer <af@bantuX.org> for reporting this issue.
If Mandos was somehow made to use a non-ephemeral Diffie-Hellman key
exchange algorithm in the TLS handshake, any saved network traffic
could then be decrypted later if the Mandos client key was obtained.
By default, Mandos uses ephemeral DH key exchanges which does not have
this problem, but a non-ephemeral key exchange algorithm was still
enabled by default. The simplest solution is to simply turn that off,
which ensures that Mandos will always use ephemeral DH key exchanges.
There is a "PFS" priority string specifier, but we can't use it because:
1. Security-wise, it is a mix between "NORMAL" and "SECURE128" - it
enables a lot more algorithms than "SECURE256".
2. It is only available since GnuTLS 3.2.4.
Thanks to Andreas Fischer <af@bantuX.org> for reporting this issue.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
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4
# Mandos server - give out binary blobs to connecting clients.
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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16
#
16
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# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
27
28
# along with this program. If not, see
28
29
# <http://www.gnu.org/licenses/>.
29
30
#
30
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
31
32
#
32
33
33
from __future__ import division
34
35
import SocketServer
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
import SocketServer as socketserver
36
40
import socket
37
import select
38
from optparse import OptionParser
41
import argparse
39
42
import datetime
40
43
import errno
41
44
import gnutls.crypto
44
47
import gnutls.library.functions
45
48
import gnutls.library.constants
46
49
import gnutls.library.types
47
import ConfigParser
50
import ConfigParser as configparser
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51
import sys
49
52
import re
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53
import os
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54
import signal
52
from sets import Set
53
55
import subprocess
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56
import atexit
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import stat
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import logging
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import logging.handlers
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import pwd
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import contextlib
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import struct
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import fcntl
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import functools
65
import cPickle as pickle
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import multiprocessing
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import types
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import binascii
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import tempfile
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import itertools
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import collections
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72
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import dbus
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import dbus.service
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import gobject
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import avahi
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from dbus.mainloop.glib import DBusGMainLoop
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78
import ctypes
65
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version = "1.0"
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logger = logging.Logger('mandos')
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syslogger = logging.handlers.SysLogHandler\
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
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syslogger.setFormatter(logging.Formatter\
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('Mandos: %(levelname)s: %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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import ctypes.util
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import xml.dom.minidom
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import inspect
82
83
try:
84
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
except AttributeError:
86
try:
87
from IN import SO_BINDTODEVICE
88
except ImportError:
89
SO_BINDTODEVICE = None
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91
if sys.version_info.major == 2:
92
str = unicode
93
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version = "1.6.9"
95
stored_state_file = "clients.pickle"
96
97
logger = logging.getLogger()
98
syslogger = None
99
100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
106
"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
112
return interface_index
113
114
115
def initlogger(debug, level=logging.WARNING):
116
"""init logger and add loglevel"""
117
118
global syslogger
119
syslogger = (logging.handlers.SysLogHandler
120
(facility =
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logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
123
syslogger.setFormatter(logging.Formatter
124
('Mandos [%(process)d]: %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(syslogger)
127
128
if debug:
129
console = logging.StreamHandler()
130
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
' [%(process)d]:'
132
' %(levelname)s:'
133
' %(message)s'))
134
logger.addHandler(console)
135
logger.setLevel(level)
136
137
138
class PGPError(Exception):
139
"""Exception if encryption/decryption fails"""
140
pass
141
142
143
class PGPEngine(object):
144
"""A simple class for OpenPGP symmetric encryption & decryption"""
145
def __init__(self):
146
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
self.gnupgargs = ['--batch',
148
'--home', self.tempdir,
149
'--force-mdc',
150
'--quiet',
151
'--no-use-agent']
152
153
def __enter__(self):
154
return self
155
156
def __exit__(self, exc_type, exc_value, traceback):
157
self._cleanup()
158
return False
159
160
def __del__(self):
161
self._cleanup()
162
163
def _cleanup(self):
164
if self.tempdir is not None:
165
# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
169
os.remove(os.path.join(root, filename))
170
for dirname in dirs:
171
os.rmdir(os.path.join(root, dirname))
172
# Remove tempdir
173
os.rmdir(self.tempdir)
174
self.tempdir = None
175
176
def password_encode(self, password):
177
# Passphrase can not be empty and can not contain newlines or
178
# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
184
.replace(b"\0", b"\\x00"))
185
return encoded
186
187
def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
191
passfile.write(passphrase)
192
passfile.flush()
193
proc = subprocess.Popen(['gpg', '--symmetric',
194
'--passphrase-file',
195
passfile.name]
196
+ self.gnupgargs,
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
203
return ciphertext
204
205
def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
219
= data)
220
if proc.returncode != 0:
221
raise PGPError(err)
222
return decrypted_plaintext
223
80
224
81
225
class AvahiError(Exception):
82
def __init__(self, value):
226
def __init__(self, value, *args, **kwargs):
83
227
self.value = value
84
def __str__(self):
85
return repr(self.value)
228
return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
86
230
87
231
class AvahiServiceError(AvahiError):
88
232
pass
93
237
94
238
class AvahiService(object):
95
239
"""An Avahi (Zeroconf) service.
240
96
241
Attributes:
97
242
interface: integer; avahi.IF_UNSPEC or an interface index.
98
243
Used to optionally bind to the specified interface.
99
244
name: string; Example: 'Mandos'
100
245
type: string; Example: '_mandos._tcp'.
101
See <http://www.dns-sd.org/ServiceTypes.html>
246
See <https://www.iana.org/assignments/service-names-port-numbers>
102
247
port: integer; what port to announce
103
248
TXT: list of strings; TXT record for the service
104
249
domain: string; Domain to publish on, default to .local if empty.
106
251
max_renames: integer; maximum number of renames
107
252
rename_count: integer; counter so we only rename after collisions
108
253
a sensible number of times
254
group: D-Bus Entry Group
255
server: D-Bus Server
256
bus: dbus.SystemBus()
109
257
"""
258
110
259
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
260
servicetype = None, port = None, TXT = None,
261
domain = "", host = "", max_renames = 32768,
262
protocol = avahi.PROTO_UNSPEC, bus = None):
113
263
self.interface = interface
114
264
self.name = name
115
self.type = type
265
self.type = servicetype
116
266
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
267
self.TXT = TXT if TXT is not None else []
121
268
self.domain = domain
122
269
self.host = host
123
270
self.rename_count = 0
124
271
self.max_renames = max_renames
125
def rename(self):
272
self.protocol = protocol
273
self.group = None # our entry group
274
self.server = None
275
self.bus = bus
276
self.entry_group_state_changed_match = None
277
278
def rename(self, remove=True):
126
279
"""Derived from the Avahi example code"""
127
280
if self.rename_count >= self.max_renames:
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
130
rename_count)
281
logger.critical("No suitable Zeroconf service name found"
282
" after %i retries, exiting.",
283
self.rename_count)
131
284
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
133
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
138
self.remove()
139
self.add()
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
140
287
self.rename_count += 1
288
logger.info("Changing Zeroconf service name to %r ...",
289
self.name)
290
if remove:
291
self.remove()
292
try:
293
self.add()
294
except dbus.exceptions.DBusException as error:
295
if (error.get_dbus_name()
296
== "org.freedesktop.Avahi.CollisionError"):
297
logger.info("Local Zeroconf service name collision.")
298
return self.rename(remove=False)
299
else:
300
logger.critical("D-Bus Exception", exc_info=error)
301
self.cleanup()
302
os._exit(1)
303
141
304
def remove(self):
142
305
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
306
if self.entry_group_state_changed_match is not None:
307
self.entry_group_state_changed_match.remove()
308
self.entry_group_state_changed_match = None
309
if self.group is not None:
310
self.group.Reset()
311
145
312
def add(self):
146
313
"""Derived from the Avahi example code"""
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
314
self.remove()
315
if self.group is None:
316
self.group = dbus.Interface(
317
self.bus.get_object(avahi.DBUS_NAME,
318
self.server.EntryGroupNew()),
319
avahi.DBUS_INTERFACE_ENTRY_GROUP)
320
self.entry_group_state_changed_match = (
321
self.group.connect_to_signal(
322
'StateChanged', self.entry_group_state_changed))
323
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
324
self.name, self.type)
325
self.group.AddService(
326
self.interface,
327
self.protocol,
328
dbus.UInt32(0), # flags
329
self.name, self.type,
330
self.domain, self.host,
331
dbus.UInt16(self.port),
332
avahi.string_array_to_txt_array(self.TXT))
333
self.group.Commit()
334
335
def entry_group_state_changed(self, state, error):
336
"""Derived from the Avahi example code"""
337
logger.debug("Avahi entry group state change: %i", state)
338
339
if state == avahi.ENTRY_GROUP_ESTABLISHED:
340
logger.debug("Zeroconf service established.")
341
elif state == avahi.ENTRY_GROUP_COLLISION:
342
logger.info("Zeroconf service name collision.")
343
self.rename()
344
elif state == avahi.ENTRY_GROUP_FAILURE:
345
logger.critical("Avahi: Error in group state changed %s",
346
str(error))
347
raise AvahiGroupError("State changed: {!s}"
348
.format(error))
349
350
def cleanup(self):
351
"""Derived from the Avahi example code"""
352
if self.group is not None:
353
try:
354
self.group.Free()
355
except (dbus.exceptions.UnknownMethodException,
356
dbus.exceptions.DBusException):
357
pass
358
self.group = None
359
self.remove()
360
361
def server_state_changed(self, state, error=None):
362
"""Derived from the Avahi example code"""
363
logger.debug("Avahi server state change: %i", state)
364
bad_states = { avahi.SERVER_INVALID:
365
"Zeroconf server invalid",
366
avahi.SERVER_REGISTERING: None,
367
avahi.SERVER_COLLISION:
368
"Zeroconf server name collision",
369
avahi.SERVER_FAILURE:
370
"Zeroconf server failure" }
371
if state in bad_states:
372
if bad_states[state] is not None:
373
if error is None:
374
logger.error(bad_states[state])
375
else:
376
logger.error(bad_states[state] + ": %r", error)
377
self.cleanup()
378
elif state == avahi.SERVER_RUNNING:
379
self.add()
380
else:
381
if error is None:
382
logger.debug("Unknown state: %r", state)
383
else:
384
logger.debug("Unknown state: %r: %r", state, error)
385
386
def activate(self):
387
"""Derived from the Avahi example code"""
388
if self.server is None:
389
self.server = dbus.Interface(
390
self.bus.get_object(avahi.DBUS_NAME,
391
avahi.DBUS_PATH_SERVER,
392
follow_name_owner_changes=True),
393
avahi.DBUS_INTERFACE_SERVER)
394
self.server.connect_to_signal("StateChanged",
395
self.server_state_changed)
396
self.server_state_changed(self.server.GetState())
397
398
399
class AvahiServiceToSyslog(AvahiService):
400
def rename(self, *args, **kwargs):
401
"""Add the new name to the syslog messages"""
402
ret = AvahiService.rename(self, *args, **kwargs)
403
syslogger.setFormatter(logging.Formatter
404
('Mandos ({}) [%(process)d]:'
405
' %(levelname)s: %(message)s'
406
.format(self.name)))
407
return ret
170
408
171
409
172
410
class Client(object):
173
411
"""A representation of a client host served by this server.
412
174
413
Attributes:
175
name: string; from the config file, used in log messages
414
approved: bool(); 'None' if not yet approved/disapproved
415
approval_delay: datetime.timedelta(); Time to wait for approval
416
approval_duration: datetime.timedelta(); Duration of one approval
417
checker: subprocess.Popen(); a running checker process used
418
to see if the client lives.
419
'None' if no process is running.
420
checker_callback_tag: a gobject event source tag, or None
421
checker_command: string; External command which is run to check
422
if client lives. %() expansions are done at
423
runtime with vars(self) as dict, so that for
424
instance %(name)s can be used in the command.
425
checker_initiator_tag: a gobject event source tag, or None
426
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
429
current_checker_command: string; current running checker_command
430
disable_initiator_tag: a gobject event source tag, or None
431
enabled: bool()
176
432
fingerprint: string (40 or 32 hexadecimal digits); used to
177
433
uniquely identify the client
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
189
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
191
checker_callback_tag: - '' -
192
checker_command: string; External command which is run to check if
193
client lives. %() expansions are done at
194
runtime with vars(self) as dict, so that for
195
instance %(name)s can be used in the command.
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
434
host: string; available for use by the checker command
435
interval: datetime.timedelta(); How often to start a new checker
436
last_approval_request: datetime.datetime(); (UTC) or None
437
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
442
name: string; from the config file, used in log messages and
443
D-Bus identifiers
444
secret: bytestring; sent verbatim (over TLS) to client
445
timeout: datetime.timedelta(); How long from last_checked_ok
446
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
450
disabled, or None
451
server_settings: The server_settings dict from main()
201
452
"""
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
453
454
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
469
470
@staticmethod
471
def config_parser(config):
472
"""Construct a new dict of client settings of this form:
473
{ client_name: {setting_name: value, ...}, ...}
474
with exceptions for any special settings as defined above.
475
NOTE: Must be a pure function. Must return the same result
476
value given the same arguments.
477
"""
478
settings = {}
479
for client_name in config.sections():
480
section = dict(config.items(client_name))
481
client = settings[client_name] = {}
482
483
client["host"] = section["host"]
484
# Reformat values from string types to Python types
485
client["approved_by_default"] = config.getboolean(
486
client_name, "approved_by_default")
487
client["enabled"] = config.getboolean(client_name,
488
"enabled")
489
490
# Uppercase and remove spaces from fingerprint for later
491
# comparison purposes with return value from the
492
# fingerprint() function
493
client["fingerprint"] = (section["fingerprint"].upper()
494
.replace(" ", ""))
495
if "secret" in section:
496
client["secret"] = section["secret"].decode("base64")
497
elif "secfile" in section:
498
with open(os.path.expanduser(os.path.expandvars
499
(section["secfile"])),
500
"rb") as secfile:
501
client["secret"] = secfile.read()
502
else:
503
raise TypeError("No secret or secfile for section {}"
504
.format(section))
505
client["timeout"] = string_to_delta(section["timeout"])
506
client["extended_timeout"] = string_to_delta(
507
section["extended_timeout"])
508
client["interval"] = string_to_delta(section["interval"])
509
client["approval_delay"] = string_to_delta(
510
section["approval_delay"])
511
client["approval_duration"] = string_to_delta(
512
section["approval_duration"])
513
client["checker_command"] = section["checker"]
514
client["last_approval_request"] = None
515
client["last_checked_ok"] = None
516
client["last_checker_status"] = -2
517
518
return settings
519
520
def __init__(self, settings, name = None, server_settings=None):
229
521
self.name = name
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint for later
232
# comparison purposes with return value from the fingerprint()
233
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
522
if server_settings is None:
523
server_settings = {}
524
self.server_settings = server_settings
525
# adding all client settings
526
for setting, value in settings.items():
527
setattr(self, setting, value)
528
529
if self.enabled:
530
if not hasattr(self, "last_enabled"):
531
self.last_enabled = datetime.datetime.utcnow()
532
if not hasattr(self, "expires"):
533
self.expires = (datetime.datetime.utcnow()
534
+ self.timeout)
243
535
else:
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
248
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
536
self.last_enabled = None
537
self.expires = None
538
539
logger.debug("Creating client %r", self.name)
540
logger.debug(" Fingerprint: %s", self.fingerprint)
541
self.created = settings.get("created",
542
datetime.datetime.utcnow())
543
544
# attributes specific for this server instance
252
545
self.checker = None
253
546
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
547
self.disable_initiator_tag = None
255
548
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
549
self.current_checker_command = None
550
self.approved = None
551
self.approvals_pending = 0
552
self.changedstate = (multiprocessing_manager
553
.Condition(multiprocessing_manager
554
.Lock()))
555
self.client_structure = [attr for attr in
556
self.__dict__.iterkeys()
557
if not attr.startswith("_")]
558
self.client_structure.append("client_structure")
559
560
for name, t in inspect.getmembers(type(self),
561
lambda obj:
562
isinstance(obj,
563
property)):
564
if not name.startswith("_"):
565
self.client_structure.append(name)
566
567
# Send notice to process children that client state has changed
568
def send_changedstate(self):
569
with self.changedstate:
570
self.changedstate.notify_all()
571
572
def enable(self):
258
573
"""Start this client's checker and timeout hooks"""
574
if getattr(self, "enabled", False):
575
# Already enabled
576
return
577
self.expires = datetime.datetime.utcnow() + self.timeout
578
self.enabled = True
579
self.last_enabled = datetime.datetime.utcnow()
580
self.init_checker()
581
self.send_changedstate()
582
583
def disable(self, quiet=True):
584
"""Disable this client."""
585
if not getattr(self, "enabled", False):
586
return False
587
if not quiet:
588
logger.info("Disabling client %s", self.name)
589
if getattr(self, "disable_initiator_tag", None) is not None:
590
gobject.source_remove(self.disable_initiator_tag)
591
self.disable_initiator_tag = None
592
self.expires = None
593
if getattr(self, "checker_initiator_tag", None) is not None:
594
gobject.source_remove(self.checker_initiator_tag)
595
self.checker_initiator_tag = None
596
self.stop_checker()
597
self.enabled = False
598
if not quiet:
599
self.send_changedstate()
600
# Do not run this again if called by a gobject.timeout_add
601
return False
602
603
def __del__(self):
604
self.disable()
605
606
def init_checker(self):
259
607
# Schedule a new checker to be started an 'interval' from now,
260
608
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
609
if self.checker_initiator_tag is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = (gobject.timeout_add
612
(int(self.interval
613
.total_seconds() * 1000),
614
self.start_checker))
615
# Schedule a disable() when 'timeout' has passed
616
if self.disable_initiator_tag is not None:
617
gobject.source_remove(self.disable_initiator_tag)
618
self.disable_initiator_tag = (gobject.timeout_add
619
(int(self.timeout
620
.total_seconds() * 1000),
621
self.disable))
264
622
# Also start a new checker *right now*.
265
623
self.start_checker()
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
279
return False
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
284
gobject.source_remove(self.checker_initiator_tag)
285
self.checker_initiator_tag = None
286
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
289
# Do not run this again if called by a gobject.timeout_add
290
return False
291
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
624
625
def checker_callback(self, pid, condition, command):
295
626
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
627
self.checker_callback_tag = None
298
628
self.checker = None
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
309
logger.warning(u"Checker for %(name)s crashed?",
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
632
logger.info("Checker for %(name)s succeeded",
633
vars(self))
634
self.checked_ok()
635
else:
636
logger.info("Checker for %(name)s failed",
637
vars(self))
638
else:
639
self.last_checker_status = -1
640
logger.warning("Checker for %(name)s crashed?",
310
641
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
642
643
def checked_ok(self):
644
"""Assert that the client has been seen, alive and well."""
645
self.last_checked_ok = datetime.datetime.utcnow()
646
self.last_checker_status = 0
647
self.bump_timeout()
648
649
def bump_timeout(self, timeout=None):
650
"""Bump up the timeout for this client."""
651
if timeout is None:
652
timeout = self.timeout
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = None
656
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(int(timeout.total_seconds()
659
* 1000), self.disable))
660
self.expires = datetime.datetime.utcnow() + timeout
661
662
def need_approval(self):
663
self.last_approval_request = datetime.datetime.utcnow()
664
314
665
def start_checker(self):
315
666
"""Start a new checker subprocess if one is not running.
667
316
668
If a checker already exists, leave it running and do
317
669
nothing."""
318
670
# The reason for not killing a running checker is that if we
319
# did that, then if a checker (for some reason) started
320
# running slowly and taking more than 'interval' time, the
321
# client would inevitably timeout, since no checker would get
322
# a chance to run to completion. If we instead leave running
671
# did that, and if a checker (for some reason) started running
672
# slowly and taking more than 'interval' time, then the client
673
# would inevitably timeout, since no checker would get a
674
# chance to run to completion. If we instead leave running
323
675
# checkers alone, the checker would have to take more time
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
676
# than 'timeout' for the client to be disabled, which is as it
677
# should be.
678
679
# If a checker exists, make sure it is not a zombie
680
try:
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except AttributeError:
683
pass
684
except OSError as error:
685
if error.errno != errno.ECHILD:
686
raise
687
else:
688
if pid:
689
logger.warning("Checker was a zombie")
690
gobject.source_remove(self.checker_callback_tag)
691
self.checker_callback(pid, status,
692
self.current_checker_command)
693
# Start a new checker if needed
326
694
if self.checker is None:
327
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
330
except TypeError:
331
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
333
for key, val in
334
vars(self).iteritems())
335
try:
336
command = self.check_command % escaped_attrs
337
except TypeError, error:
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
340
return True # Try again later
341
try:
342
logger.info(u"Starting checker %r for %s",
695
# Escape attributes for the shell
696
escaped_attrs = { attr:
697
re.escape(str(getattr(self, attr)))
698
for attr in self.runtime_expansions }
699
try:
700
command = self.checker_command % escaped_attrs
701
except TypeError as error:
702
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
705
self.current_checker_command = command
706
try:
707
logger.info("Starting checker %r for %s",
343
708
command, self.name)
344
709
# We don't need to redirect stdout and stderr, since
345
710
# in normal mode, that is already done by daemon(),
346
711
# and in debug mode we don't want to. (Stdin is
347
712
# always replaced by /dev/null.)
713
# The exception is when not debugging but nevertheless
714
# running in the foreground; use the previously
715
# created wnull.
716
popen_args = {}
717
if (not self.server_settings["debug"]
718
and self.server_settings["foreground"]):
719
popen_args.update({"stdout": wnull,
720
"stderr": wnull })
348
721
self.checker = subprocess.Popen(command,
349
722
close_fds=True,
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
354
except OSError, error:
355
logger.error(u"Failed to start subprocess: %s",
356
error)
723
shell=True, cwd="/",
724
**popen_args)
725
except OSError as error:
726
logger.error("Failed to start subprocess",
727
exc_info=error)
728
return True
729
self.checker_callback_tag = (gobject.child_watch_add
730
(self.checker.pid,
731
self.checker_callback,
732
data=command))
733
# The checker may have completed before the gobject
734
# watch was added. Check for this.
735
try:
736
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
737
except OSError as error:
738
if error.errno == errno.ECHILD:
739
# This should never happen
740
logger.error("Child process vanished",
741
exc_info=error)
742
return True
743
raise
744
if pid:
745
gobject.source_remove(self.checker_callback_tag)
746
self.checker_callback(pid, status, command)
357
747
# Re-run this periodically if run by gobject.timeout_add
358
748
return True
749
359
750
def stop_checker(self):
360
751
"""Force the checker process, if any, to stop."""
361
752
if self.checker_callback_tag:
363
754
self.checker_callback_tag = None
364
755
if getattr(self, "checker", None) is None:
365
756
return
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
757
logger.debug("Stopping checker for %(name)s", vars(self))
367
758
try:
368
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
759
self.checker.terminate()
760
#time.sleep(0.5)
370
761
#if self.checker.poll() is None:
371
# os.kill(self.checker.pid, signal.SIGKILL)
372
except OSError, error:
762
# self.checker.kill()
763
except OSError as error:
373
764
if error.errno != errno.ESRCH: # No such process
374
765
raise
375
766
self.checker = None
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
380
return now < (self.created + self.timeout)
381
else:
382
return now < (self.last_checked_ok + self.timeout)
383
384
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
767
768
769
def dbus_service_property(dbus_interface, signature="v",
770
access="readwrite", byte_arrays=False):
771
"""Decorators for marking methods of a DBusObjectWithProperties to
772
become properties on the D-Bus.
773
774
The decorated method will be called with no arguments by "Get"
775
and with one argument by "Set".
776
777
The parameters, where they are supported, are the same as
778
dbus.service.method, except there is only "signature", since the
779
type from Get() and the type sent to Set() is the same.
780
"""
781
# Encoding deeply encoded byte arrays is not supported yet by the
782
# "Set" method, so we fail early here:
783
if byte_arrays and signature != "ay":
784
raise ValueError("Byte arrays not supported for non-'ay'"
785
" signature {!r}".format(signature))
786
def decorator(func):
787
func._dbus_is_property = True
788
func._dbus_interface = dbus_interface
789
func._dbus_signature = signature
790
func._dbus_access = access
791
func._dbus_name = func.__name__
792
if func._dbus_name.endswith("_dbus_property"):
793
func._dbus_name = func._dbus_name[:-14]
794
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
795
return func
796
return decorator
797
798
799
def dbus_interface_annotations(dbus_interface):
800
"""Decorator for marking functions returning interface annotations
801
802
Usage:
803
804
@dbus_interface_annotations("org.example.Interface")
805
def _foo(self): # Function name does not matter
806
return {"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property.EmitsChangedSignal":
808
"false"}
809
"""
810
def decorator(func):
811
func._dbus_is_interface = True
812
func._dbus_interface = dbus_interface
813
func._dbus_name = dbus_interface
814
return func
815
return decorator
816
817
818
def dbus_annotations(annotations):
819
"""Decorator to annotate D-Bus methods, signals or properties
820
Usage:
821
822
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
823
"org.freedesktop.DBus.Property."
824
"EmitsChangedSignal": "false"})
825
@dbus_service_property("org.example.Interface", signature="b",
826
access="r")
827
def Property_dbus_property(self):
828
return dbus.Boolean(False)
829
"""
830
def decorator(func):
831
func._dbus_annotations = annotations
832
return func
833
return decorator
834
835
836
class DBusPropertyException(dbus.exceptions.DBusException):
837
"""A base class for D-Bus property-related exceptions
838
"""
839
pass
840
841
class DBusPropertyAccessException(DBusPropertyException):
842
"""A property's access permissions disallows an operation.
843
"""
844
pass
845
846
847
class DBusPropertyNotFound(DBusPropertyException):
848
"""An attempt was made to access a non-existing property.
849
"""
850
pass
851
852
853
class DBusObjectWithProperties(dbus.service.Object):
854
"""A D-Bus object with properties.
855
856
Classes inheriting from this can use the dbus_service_property
857
decorator to expose methods as D-Bus properties. It exposes the
858
standard Get(), Set(), and GetAll() methods on the D-Bus.
859
"""
860
861
@staticmethod
862
def _is_dbus_thing(thing):
863
"""Returns a function testing if an attribute is a D-Bus thing
864
865
If called like _is_dbus_thing("method") it returns a function
866
suitable for use as predicate to inspect.getmembers().
867
"""
868
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
869
False)
870
871
def _get_all_dbus_things(self, thing):
872
"""Returns a generator of (name, attribute) pairs
873
"""
874
return ((getattr(athing.__get__(self), "_dbus_name",
875
name),
876
athing.__get__(self))
877
for cls in self.__class__.__mro__
878
for name, athing in
879
inspect.getmembers(cls,
880
self._is_dbus_thing(thing)))
881
882
def _get_dbus_property(self, interface_name, property_name):
883
"""Returns a bound method if one exists which is a D-Bus
884
property with the specified name and interface.
885
"""
886
for cls in self.__class__.__mro__:
887
for name, value in (inspect.getmembers
888
(cls,
889
self._is_dbus_thing("property"))):
890
if (value._dbus_name == property_name
891
and value._dbus_interface == interface_name):
892
return value.__get__(self)
893
894
# No such property
895
raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
+ interface_name + "."
897
+ property_name)
898
899
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
900
out_signature="v")
901
def Get(self, interface_name, property_name):
902
"""Standard D-Bus property Get() method, see D-Bus standard.
903
"""
904
prop = self._get_dbus_property(interface_name, property_name)
905
if prop._dbus_access == "write":
906
raise DBusPropertyAccessException(property_name)
907
value = prop()
908
if not hasattr(value, "variant_level"):
909
return value
910
return type(value)(value, variant_level=value.variant_level+1)
911
912
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
913
def Set(self, interface_name, property_name, value):
914
"""Standard D-Bus property Set() method, see D-Bus standard.
915
"""
916
prop = self._get_dbus_property(interface_name, property_name)
917
if prop._dbus_access == "read":
918
raise DBusPropertyAccessException(property_name)
919
if prop._dbus_get_args_options["byte_arrays"]:
920
# The byte_arrays option is not supported yet on
921
# signatures other than "ay".
922
if prop._dbus_signature != "ay":
923
raise ValueError("Byte arrays not supported for non-"
924
"'ay' signature {!r}"
925
.format(prop._dbus_signature))
926
value = dbus.ByteArray(b''.join(chr(byte)
927
for byte in value))
928
prop(value)
929
930
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
931
out_signature="a{sv}")
932
def GetAll(self, interface_name):
933
"""Standard D-Bus property GetAll() method, see D-Bus
934
standard.
935
936
Note: Will not include properties with access="write".
937
"""
938
properties = {}
939
for name, prop in self._get_all_dbus_things("property"):
940
if (interface_name
941
and interface_name != prop._dbus_interface):
942
# Interface non-empty but did not match
943
continue
944
# Ignore write-only properties
945
if prop._dbus_access == "write":
946
continue
947
value = prop()
948
if not hasattr(value, "variant_level"):
949
properties[name] = value
950
continue
951
properties[name] = type(value)(value, variant_level=
952
value.variant_level+1)
953
return dbus.Dictionary(properties, signature="sv")
954
955
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
956
def PropertiesChanged(self, interface_name, changed_properties,
957
invalidated_properties):
958
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
959
standard.
960
"""
961
pass
962
963
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
964
out_signature="s",
965
path_keyword='object_path',
966
connection_keyword='connection')
967
def Introspect(self, object_path, connection):
968
"""Overloading of standard D-Bus method.
969
970
Inserts property tags and interface annotation tags.
971
"""
972
xmlstring = dbus.service.Object.Introspect(self, object_path,
973
connection)
974
try:
975
document = xml.dom.minidom.parseString(xmlstring)
976
def make_tag(document, name, prop):
977
e = document.createElement("property")
978
e.setAttribute("name", name)
979
e.setAttribute("type", prop._dbus_signature)
980
e.setAttribute("access", prop._dbus_access)
981
return e
982
for if_tag in document.getElementsByTagName("interface"):
983
# Add property tags
984
for tag in (make_tag(document, name, prop)
985
for name, prop
986
in self._get_all_dbus_things("property")
987
if prop._dbus_interface
988
== if_tag.getAttribute("name")):
989
if_tag.appendChild(tag)
990
# Add annotation tags
991
for typ in ("method", "signal", "property"):
992
for tag in if_tag.getElementsByTagName(typ):
993
annots = dict()
994
for name, prop in (self.
995
_get_all_dbus_things(typ)):
996
if (name == tag.getAttribute("name")
997
and prop._dbus_interface
998
== if_tag.getAttribute("name")):
999
annots.update(getattr
1000
(prop,
1001
"_dbus_annotations",
1002
{}))
1003
for name, value in annots.items():
1004
ann_tag = document.createElement(
1005
"annotation")
1006
ann_tag.setAttribute("name", name)
1007
ann_tag.setAttribute("value", value)
1008
tag.appendChild(ann_tag)
1009
# Add interface annotation tags
1010
for annotation, value in dict(
1011
itertools.chain.from_iterable(
1012
annotations().items()
1013
for name, annotations in
1014
self._get_all_dbus_things("interface")
1015
if name == if_tag.getAttribute("name")
1016
)).items():
1017
ann_tag = document.createElement("annotation")
1018
ann_tag.setAttribute("name", annotation)
1019
ann_tag.setAttribute("value", value)
1020
if_tag.appendChild(ann_tag)
1021
# Add the names to the return values for the
1022
# "org.freedesktop.DBus.Properties" methods
1023
if (if_tag.getAttribute("name")
1024
== "org.freedesktop.DBus.Properties"):
1025
for cn in if_tag.getElementsByTagName("method"):
1026
if cn.getAttribute("name") == "Get":
1027
for arg in cn.getElementsByTagName("arg"):
1028
if (arg.getAttribute("direction")
1029
== "out"):
1030
arg.setAttribute("name", "value")
1031
elif cn.getAttribute("name") == "GetAll":
1032
for arg in cn.getElementsByTagName("arg"):
1033
if (arg.getAttribute("direction")
1034
== "out"):
1035
arg.setAttribute("name", "props")
1036
xmlstring = document.toxml("utf-8")
1037
document.unlink()
1038
except (AttributeError, xml.dom.DOMException,
1039
xml.parsers.expat.ExpatError) as error:
1040
logger.error("Failed to override Introspection method",
1041
exc_info=error)
1042
return xmlstring
1043
1044
1045
def datetime_to_dbus(dt, variant_level=0):
1046
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1047
if dt is None:
1048
return dbus.String("", variant_level = variant_level)
1049
return dbus.String(dt.isoformat(),
1050
variant_level=variant_level)
1051
1052
1053
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1054
"""A class decorator; applied to a subclass of
1055
dbus.service.Object, it will add alternate D-Bus attributes with
1056
interface names according to the "alt_interface_names" mapping.
1057
Usage:
1058
1059
@alternate_dbus_interfaces({"org.example.Interface":
1060
"net.example.AlternateInterface"})
1061
class SampleDBusObject(dbus.service.Object):
1062
@dbus.service.method("org.example.Interface")
1063
def SampleDBusMethod():
1064
pass
1065
1066
The above "SampleDBusMethod" on "SampleDBusObject" will be
1067
reachable via two interfaces: "org.example.Interface" and
1068
"net.example.AlternateInterface", the latter of which will have
1069
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1070
"true", unless "deprecate" is passed with a False value.
1071
1072
This works for methods and signals, and also for D-Bus properties
1073
(from DBusObjectWithProperties) and interfaces (from the
1074
dbus_interface_annotations decorator).
1075
"""
1076
def wrapper(cls):
1077
for orig_interface_name, alt_interface_name in (
1078
alt_interface_names.items()):
1079
attr = {}
1080
interface_names = set()
1081
# Go though all attributes of the class
1082
for attrname, attribute in inspect.getmembers(cls):
1083
# Ignore non-D-Bus attributes, and D-Bus attributes
1084
# with the wrong interface name
1085
if (not hasattr(attribute, "_dbus_interface")
1086
or not attribute._dbus_interface
1087
.startswith(orig_interface_name)):
1088
continue
1089
# Create an alternate D-Bus interface name based on
1090
# the current name
1091
alt_interface = (attribute._dbus_interface
1092
.replace(orig_interface_name,
1093
alt_interface_name))
1094
interface_names.add(alt_interface)
1095
# Is this a D-Bus signal?
1096
if getattr(attribute, "_dbus_is_signal", False):
1097
# Extract the original non-method undecorated
1098
# function by black magic
1099
nonmethod_func = (dict(
1100
zip(attribute.func_code.co_freevars,
1101
attribute.__closure__))["func"]
1102
.cell_contents)
1103
# Create a new, but exactly alike, function
1104
# object, and decorate it to be a new D-Bus signal
1105
# with the alternate D-Bus interface name
1106
new_function = (dbus.service.signal
1107
(alt_interface,
1108
attribute._dbus_signature)
1109
(types.FunctionType(
1110
nonmethod_func.func_code,
1111
nonmethod_func.func_globals,
1112
nonmethod_func.func_name,
1113
nonmethod_func.func_defaults,
1114
nonmethod_func.func_closure)))
1115
# Copy annotations, if any
1116
try:
1117
new_function._dbus_annotations = (
1118
dict(attribute._dbus_annotations))
1119
except AttributeError:
1120
pass
1121
# Define a creator of a function to call both the
1122
# original and alternate functions, so both the
1123
# original and alternate signals gets sent when
1124
# the function is called
1125
def fixscope(func1, func2):
1126
"""This function is a scope container to pass
1127
func1 and func2 to the "call_both" function
1128
outside of its arguments"""
1129
def call_both(*args, **kwargs):
1130
"""This function will emit two D-Bus
1131
signals by calling func1 and func2"""
1132
func1(*args, **kwargs)
1133
func2(*args, **kwargs)
1134
return call_both
1135
# Create the "call_both" function and add it to
1136
# the class
1137
attr[attrname] = fixscope(attribute, new_function)
1138
# Is this a D-Bus method?
1139
elif getattr(attribute, "_dbus_is_method", False):
1140
# Create a new, but exactly alike, function
1141
# object. Decorate it to be a new D-Bus method
1142
# with the alternate D-Bus interface name. Add it
1143
# to the class.
1144
attr[attrname] = (dbus.service.method
1145
(alt_interface,
1146
attribute._dbus_in_signature,
1147
attribute._dbus_out_signature)
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Copy annotations, if any
1155
try:
1156
attr[attrname]._dbus_annotations = (
1157
dict(attribute._dbus_annotations))
1158
except AttributeError:
1159
pass
1160
# Is this a D-Bus property?
1161
elif getattr(attribute, "_dbus_is_property", False):
1162
# Create a new, but exactly alike, function
1163
# object, and decorate it to be a new D-Bus
1164
# property with the alternate D-Bus interface
1165
# name. Add it to the class.
1166
attr[attrname] = (dbus_service_property
1167
(alt_interface,
1168
attribute._dbus_signature,
1169
attribute._dbus_access,
1170
attribute
1171
._dbus_get_args_options
1172
["byte_arrays"])
1173
(types.FunctionType
1174
(attribute.func_code,
1175
attribute.func_globals,
1176
attribute.func_name,
1177
attribute.func_defaults,
1178
attribute.func_closure)))
1179
# Copy annotations, if any
1180
try:
1181
attr[attrname]._dbus_annotations = (
1182
dict(attribute._dbus_annotations))
1183
except AttributeError:
1184
pass
1185
# Is this a D-Bus interface?
1186
elif getattr(attribute, "_dbus_is_interface", False):
1187
# Create a new, but exactly alike, function
1188
# object. Decorate it to be a new D-Bus interface
1189
# with the alternate D-Bus interface name. Add it
1190
# to the class.
1191
attr[attrname] = (dbus_interface_annotations
1192
(alt_interface)
1193
(types.FunctionType
1194
(attribute.func_code,
1195
attribute.func_globals,
1196
attribute.func_name,
1197
attribute.func_defaults,
1198
attribute.func_closure)))
1199
if deprecate:
1200
# Deprecate all alternate interfaces
1201
iname="_AlternateDBusNames_interface_annotation{}"
1202
for interface_name in interface_names:
1203
@dbus_interface_annotations(interface_name)
1204
def func(self):
1205
return { "org.freedesktop.DBus.Deprecated":
1206
"true" }
1207
# Find an unused name
1208
for aname in (iname.format(i)
1209
for i in itertools.count()):
1210
if aname not in attr:
1211
attr[aname] = func
1212
break
1213
if interface_names:
1214
# Replace the class with a new subclass of it with
1215
# methods, signals, etc. as created above.
1216
cls = type(b"{}Alternate".format(cls.__name__),
1217
(cls,), attr)
1218
return cls
1219
return wrapper
1220
1221
1222
@alternate_dbus_interfaces({"se.recompile.Mandos":
1223
"se.bsnet.fukt.Mandos"})
1224
class ClientDBus(Client, DBusObjectWithProperties):
1225
"""A Client class using D-Bus
1226
1227
Attributes:
1228
dbus_object_path: dbus.ObjectPath
1229
bus: dbus.SystemBus()
1230
"""
1231
1232
runtime_expansions = (Client.runtime_expansions
1233
+ ("dbus_object_path",))
1234
1235
_interface = "se.recompile.Mandos.Client"
1236
1237
# dbus.service.Object doesn't use super(), so we can't either.
1238
1239
def __init__(self, bus = None, *args, **kwargs):
1240
self.bus = bus
1241
Client.__init__(self, *args, **kwargs)
1242
# Only now, when this client is initialized, can it show up on
1243
# the D-Bus
1244
client_object_name = str(self.name).translate(
1245
{ord("."): ord("_"),
1246
ord("-"): ord("_")})
1247
self.dbus_object_path = (dbus.ObjectPath
1248
("/clients/" + client_object_name))
1249
DBusObjectWithProperties.__init__(self, self.bus,
1250
self.dbus_object_path)
1251
1252
def notifychangeproperty(transform_func,
1253
dbus_name, type_func=lambda x: x,
1254
variant_level=1, invalidate_only=False,
1255
_interface=_interface):
1256
""" Modify a variable so that it's a property which announces
1257
its changes to DBus.
1258
1259
transform_fun: Function that takes a value and a variant_level
1260
and transforms it to a D-Bus type.
1261
dbus_name: D-Bus name of the variable
1262
type_func: Function that transform the value before sending it
1263
to the D-Bus. Default: no transform
1264
variant_level: D-Bus variant level. Default: 1
1265
"""
1266
attrname = "_{}".format(dbus_name)
1267
def setter(self, value):
1268
if hasattr(self, "dbus_object_path"):
1269
if (not hasattr(self, attrname) or
1270
type_func(getattr(self, attrname, None))
1271
!= type_func(value)):
1272
if invalidate_only:
1273
self.PropertiesChanged(_interface,
1274
dbus.Dictionary(),
1275
dbus.Array
1276
((dbus_name,)))
1277
else:
1278
dbus_value = transform_func(type_func(value),
1279
variant_level
1280
=variant_level)
1281
self.PropertyChanged(dbus.String(dbus_name),
1282
dbus_value)
1283
self.PropertiesChanged(_interface,
1284
dbus.Dictionary({
1285
dbus.String(dbus_name):
1286
dbus_value }), dbus.Array())
1287
setattr(self, attrname, value)
1288
1289
return property(lambda self: getattr(self, attrname), setter)
1290
1291
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1292
approvals_pending = notifychangeproperty(dbus.Boolean,
1293
"ApprovalPending",
1294
type_func = bool)
1295
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1296
last_enabled = notifychangeproperty(datetime_to_dbus,
1297
"LastEnabled")
1298
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1299
type_func = lambda checker:
1300
checker is not None)
1301
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1302
"LastCheckedOK")
1303
last_checker_status = notifychangeproperty(dbus.Int16,
1304
"LastCheckerStatus")
1305
last_approval_request = notifychangeproperty(
1306
datetime_to_dbus, "LastApprovalRequest")
1307
approved_by_default = notifychangeproperty(dbus.Boolean,
1308
"ApprovedByDefault")
1309
approval_delay = notifychangeproperty(dbus.UInt64,
1310
"ApprovalDelay",
1311
type_func =
1312
lambda td: td.total_seconds()
1313
* 1000)
1314
approval_duration = notifychangeproperty(
1315
dbus.UInt64, "ApprovalDuration",
1316
type_func = lambda td: td.total_seconds() * 1000)
1317
host = notifychangeproperty(dbus.String, "Host")
1318
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1319
type_func = lambda td:
1320
td.total_seconds() * 1000)
1321
extended_timeout = notifychangeproperty(
1322
dbus.UInt64, "ExtendedTimeout",
1323
type_func = lambda td: td.total_seconds() * 1000)
1324
interval = notifychangeproperty(dbus.UInt64,
1325
"Interval",
1326
type_func =
1327
lambda td: td.total_seconds()
1328
* 1000)
1329
checker_command = notifychangeproperty(dbus.String, "Checker")
1330
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1331
invalidate_only=True)
1332
1333
del notifychangeproperty
1334
1335
def __del__(self, *args, **kwargs):
1336
try:
1337
self.remove_from_connection()
1338
except LookupError:
1339
pass
1340
if hasattr(DBusObjectWithProperties, "__del__"):
1341
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1342
Client.__del__(self, *args, **kwargs)
1343
1344
def checker_callback(self, pid, condition, command,
1345
*args, **kwargs):
1346
self.checker_callback_tag = None
1347
self.checker = None
1348
if os.WIFEXITED(condition):
1349
exitstatus = os.WEXITSTATUS(condition)
1350
# Emit D-Bus signal
1351
self.CheckerCompleted(dbus.Int16(exitstatus),
1352
dbus.Int64(condition),
1353
dbus.String(command))
1354
else:
1355
# Emit D-Bus signal
1356
self.CheckerCompleted(dbus.Int16(-1),
1357
dbus.Int64(condition),
1358
dbus.String(command))
1359
1360
return Client.checker_callback(self, pid, condition, command,
1361
*args, **kwargs)
1362
1363
def start_checker(self, *args, **kwargs):
1364
old_checker_pid = getattr(self.checker, "pid", None)
1365
r = Client.start_checker(self, *args, **kwargs)
1366
# Only if new checker process was started
1367
if (self.checker is not None
1368
and old_checker_pid != self.checker.pid):
1369
# Emit D-Bus signal
1370
self.CheckerStarted(self.current_checker_command)
1371
return r
1372
1373
def _reset_approved(self):
1374
self.approved = None
1375
return False
1376
1377
def approve(self, value=True):
1378
self.approved = value
1379
gobject.timeout_add(int(self.approval_duration.total_seconds()
1380
* 1000), self._reset_approved)
1381
self.send_changedstate()
1382
1383
## D-Bus methods, signals & properties
1384
1385
## Interfaces
1386
1387
## Signals
1388
1389
# CheckerCompleted - signal
1390
@dbus.service.signal(_interface, signature="nxs")
1391
def CheckerCompleted(self, exitcode, waitstatus, command):
1392
"D-Bus signal"
1393
pass
1394
1395
# CheckerStarted - signal
1396
@dbus.service.signal(_interface, signature="s")
1397
def CheckerStarted(self, command):
1398
"D-Bus signal"
1399
pass
1400
1401
# PropertyChanged - signal
1402
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1403
@dbus.service.signal(_interface, signature="sv")
1404
def PropertyChanged(self, property, value):
1405
"D-Bus signal"
1406
pass
1407
1408
# GotSecret - signal
1409
@dbus.service.signal(_interface)
1410
def GotSecret(self):
1411
"""D-Bus signal
1412
Is sent after a successful transfer of secret from the Mandos
1413
server to mandos-client
1414
"""
1415
pass
1416
1417
# Rejected - signal
1418
@dbus.service.signal(_interface, signature="s")
1419
def Rejected(self, reason):
1420
"D-Bus signal"
1421
pass
1422
1423
# NeedApproval - signal
1424
@dbus.service.signal(_interface, signature="tb")
1425
def NeedApproval(self, timeout, default):
1426
"D-Bus signal"
1427
return self.need_approval()
1428
1429
## Methods
1430
1431
# Approve - method
1432
@dbus.service.method(_interface, in_signature="b")
1433
def Approve(self, value):
1434
self.approve(value)
1435
1436
# CheckedOK - method
1437
@dbus.service.method(_interface)
1438
def CheckedOK(self):
1439
self.checked_ok()
1440
1441
# Enable - method
1442
@dbus.service.method(_interface)
1443
def Enable(self):
1444
"D-Bus method"
1445
self.enable()
1446
1447
# StartChecker - method
1448
@dbus.service.method(_interface)
1449
def StartChecker(self):
1450
"D-Bus method"
1451
self.start_checker()
1452
1453
# Disable - method
1454
@dbus.service.method(_interface)
1455
def Disable(self):
1456
"D-Bus method"
1457
self.disable()
1458
1459
# StopChecker - method
1460
@dbus.service.method(_interface)
1461
def StopChecker(self):
1462
self.stop_checker()
1463
1464
## Properties
1465
1466
# ApprovalPending - property
1467
@dbus_service_property(_interface, signature="b", access="read")
1468
def ApprovalPending_dbus_property(self):
1469
return dbus.Boolean(bool(self.approvals_pending))
1470
1471
# ApprovedByDefault - property
1472
@dbus_service_property(_interface, signature="b",
1473
access="readwrite")
1474
def ApprovedByDefault_dbus_property(self, value=None):
1475
if value is None: # get
1476
return dbus.Boolean(self.approved_by_default)
1477
self.approved_by_default = bool(value)
1478
1479
# ApprovalDelay - property
1480
@dbus_service_property(_interface, signature="t",
1481
access="readwrite")
1482
def ApprovalDelay_dbus_property(self, value=None):
1483
if value is None: # get
1484
return dbus.UInt64(self.approval_delay.total_seconds()
1485
* 1000)
1486
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1487
1488
# ApprovalDuration - property
1489
@dbus_service_property(_interface, signature="t",
1490
access="readwrite")
1491
def ApprovalDuration_dbus_property(self, value=None):
1492
if value is None: # get
1493
return dbus.UInt64(self.approval_duration.total_seconds()
1494
* 1000)
1495
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1496
1497
# Name - property
1498
@dbus_service_property(_interface, signature="s", access="read")
1499
def Name_dbus_property(self):
1500
return dbus.String(self.name)
1501
1502
# Fingerprint - property
1503
@dbus_service_property(_interface, signature="s", access="read")
1504
def Fingerprint_dbus_property(self):
1505
return dbus.String(self.fingerprint)
1506
1507
# Host - property
1508
@dbus_service_property(_interface, signature="s",
1509
access="readwrite")
1510
def Host_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.String(self.host)
1513
self.host = str(value)
1514
1515
# Created - property
1516
@dbus_service_property(_interface, signature="s", access="read")
1517
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1519
1520
# LastEnabled - property
1521
@dbus_service_property(_interface, signature="s", access="read")
1522
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1524
1525
# Enabled - property
1526
@dbus_service_property(_interface, signature="b",
1527
access="readwrite")
1528
def Enabled_dbus_property(self, value=None):
1529
if value is None: # get
1530
return dbus.Boolean(self.enabled)
1531
if value:
1532
self.enable()
1533
else:
1534
self.disable()
1535
1536
# LastCheckedOK - property
1537
@dbus_service_property(_interface, signature="s",
1538
access="readwrite")
1539
def LastCheckedOK_dbus_property(self, value=None):
1540
if value is not None:
1541
self.checked_ok()
1542
return
1543
return datetime_to_dbus(self.last_checked_ok)
1544
1545
# LastCheckerStatus - property
1546
@dbus_service_property(_interface, signature="n",
1547
access="read")
1548
def LastCheckerStatus_dbus_property(self):
1549
return dbus.Int16(self.last_checker_status)
1550
1551
# Expires - property
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def Expires_dbus_property(self):
1554
return datetime_to_dbus(self.expires)
1555
1556
# LastApprovalRequest - property
1557
@dbus_service_property(_interface, signature="s", access="read")
1558
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1560
1561
# Timeout - property
1562
@dbus_service_property(_interface, signature="t",
1563
access="readwrite")
1564
def Timeout_dbus_property(self, value=None):
1565
if value is None: # get
1566
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1567
old_timeout = self.timeout
1568
self.timeout = datetime.timedelta(0, 0, 0, value)
1569
# Reschedule disabling
1570
if self.enabled:
1571
now = datetime.datetime.utcnow()
1572
self.expires += self.timeout - old_timeout
1573
if self.expires <= now:
1574
# The timeout has passed
1575
self.disable()
1576
else:
1577
if (getattr(self, "disable_initiator_tag", None)
1578
is None):
1579
return
1580
gobject.source_remove(self.disable_initiator_tag)
1581
self.disable_initiator_tag = (
1582
gobject.timeout_add(
1583
int((self.expires - now).total_seconds()
1584
* 1000), self.disable))
1585
1586
# ExtendedTimeout - property
1587
@dbus_service_property(_interface, signature="t",
1588
access="readwrite")
1589
def ExtendedTimeout_dbus_property(self, value=None):
1590
if value is None: # get
1591
return dbus.UInt64(self.extended_timeout.total_seconds()
1592
* 1000)
1593
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1594
1595
# Interval - property
1596
@dbus_service_property(_interface, signature="t",
1597
access="readwrite")
1598
def Interval_dbus_property(self, value=None):
1599
if value is None: # get
1600
return dbus.UInt64(self.interval.total_seconds() * 1000)
1601
self.interval = datetime.timedelta(0, 0, 0, value)
1602
if getattr(self, "checker_initiator_tag", None) is None:
1603
return
1604
if self.enabled:
1605
# Reschedule checker run
1606
gobject.source_remove(self.checker_initiator_tag)
1607
self.checker_initiator_tag = (gobject.timeout_add
1608
(value, self.start_checker))
1609
self.start_checker() # Start one now, too
1610
1611
# Checker - property
1612
@dbus_service_property(_interface, signature="s",
1613
access="readwrite")
1614
def Checker_dbus_property(self, value=None):
1615
if value is None: # get
1616
return dbus.String(self.checker_command)
1617
self.checker_command = str(value)
1618
1619
# CheckerRunning - property
1620
@dbus_service_property(_interface, signature="b",
1621
access="readwrite")
1622
def CheckerRunning_dbus_property(self, value=None):
1623
if value is None: # get
1624
return dbus.Boolean(self.checker is not None)
1625
if value:
1626
self.start_checker()
1627
else:
1628
self.stop_checker()
1629
1630
# ObjectPath - property
1631
@dbus_service_property(_interface, signature="o", access="read")
1632
def ObjectPath_dbus_property(self):
1633
return self.dbus_object_path # is already a dbus.ObjectPath
1634
1635
# Secret = property
1636
@dbus_service_property(_interface, signature="ay",
1637
access="write", byte_arrays=True)
1638
def Secret_dbus_property(self, value):
1639
self.secret = bytes(value)
1640
1641
del _interface
1642
1643
1644
class ProxyClient(object):
1645
def __init__(self, child_pipe, fpr, address):
1646
self._pipe = child_pipe
1647
self._pipe.send(('init', fpr, address))
1648
if not self._pipe.recv():
1649
raise KeyError()
1650
1651
def __getattribute__(self, name):
1652
if name == '_pipe':
1653
return super(ProxyClient, self).__getattribute__(name)
1654
self._pipe.send(('getattr', name))
1655
data = self._pipe.recv()
1656
if data[0] == 'data':
1657
return data[1]
1658
if data[0] == 'function':
1659
def func(*args, **kwargs):
1660
self._pipe.send(('funcall', name, args, kwargs))
1661
return self._pipe.recv()[1]
1662
return func
1663
1664
def __setattr__(self, name, value):
1665
if name == '_pipe':
1666
return super(ProxyClient, self).__setattr__(name, value)
1667
self._pipe.send(('setattr', name, value))
1668
1669
1670
class ClientHandler(socketserver.BaseRequestHandler, object):
1671
"""A class to handle client connections.
1672
1673
Instantiated once for each connection to handle it.
442
1674
Note: This will run in its own forked process."""
443
1675
444
1676
def handle(self):
445
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1677
with contextlib.closing(self.server.child_pipe) as child_pipe:
1678
logger.info("TCP connection from: %s",
1679
str(self.client_address))
1680
logger.debug("Pipe FD: %d",
1681
self.server.child_pipe.fileno())
1682
1683
session = (gnutls.connection
1684
.ClientSession(self.request,
1685
gnutls.connection
1686
.X509Credentials()))
1687
1688
# Note: gnutls.connection.X509Credentials is really a
1689
# generic GnuTLS certificate credentials object so long as
1690
# no X.509 keys are added to it. Therefore, we can use it
1691
# here despite using OpenPGP certificates.
1692
1693
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1694
# "+AES-256-CBC", "+SHA1",
1695
# "+COMP-NULL", "+CTYPE-OPENPGP",
1696
# "+DHE-DSS"))
1697
# Use a fallback default, since this MUST be set.
1698
priority = self.server.gnutls_priority
1699
if priority is None:
1700
priority = "NORMAL"
1701
(gnutls.library.functions
1702
.gnutls_priority_set_direct(session._c_object,
1703
priority, None))
1704
1705
# Start communication using the Mandos protocol
1706
# Get protocol number
1707
line = self.request.makefile().readline()
1708
logger.debug("Protocol version: %r", line)
1709
try:
1710
if int(line.strip().split()[0]) > 1:
1711
raise RuntimeError(line)
1712
except (ValueError, IndexError, RuntimeError) as error:
1713
logger.error("Unknown protocol version: %s", error)
1714
return
1715
1716
# Start GnuTLS connection
1717
try:
1718
session.handshake()
1719
except gnutls.errors.GNUTLSError as error:
1720
logger.warning("Handshake failed: %s", error)
1721
# Do not run session.bye() here: the session is not
1722
# established. Just abandon the request.
1723
return
1724
logger.debug("Handshake succeeded")
1725
1726
approval_required = False
1727
try:
1728
try:
1729
fpr = self.fingerprint(self.peer_certificate
1730
(session))
1731
except (TypeError,
1732
gnutls.errors.GNUTLSError) as error:
1733
logger.warning("Bad certificate: %s", error)
1734
return
1735
logger.debug("Fingerprint: %s", fpr)
1736
1737
try:
1738
client = ProxyClient(child_pipe, fpr,
1739
self.client_address)
1740
except KeyError:
1741
return
1742
1743
if client.approval_delay:
1744
delay = client.approval_delay
1745
client.approvals_pending += 1
1746
approval_required = True
1747
1748
while True:
1749
if not client.enabled:
1750
logger.info("Client %s is disabled",
1751
client.name)
1752
if self.server.use_dbus:
1753
# Emit D-Bus signal
1754
client.Rejected("Disabled")
1755
return
1756
1757
if client.approved or not client.approval_delay:
1758
#We are approved or approval is disabled
1759
break
1760
elif client.approved is None:
1761
logger.info("Client %s needs approval",
1762
client.name)
1763
if self.server.use_dbus:
1764
# Emit D-Bus signal
1765
client.NeedApproval(
1766
client.approval_delay.total_seconds()
1767
* 1000, client.approved_by_default)
1768
else:
1769
logger.warning("Client %s was not approved",
1770
client.name)
1771
if self.server.use_dbus:
1772
# Emit D-Bus signal
1773
client.Rejected("Denied")
1774
return
1775
1776
#wait until timeout or approved
1777
time = datetime.datetime.now()
1778
client.changedstate.acquire()
1779
client.changedstate.wait(delay.total_seconds())
1780
client.changedstate.release()
1781
time2 = datetime.datetime.now()
1782
if (time2 - time) >= delay:
1783
if not client.approved_by_default:
1784
logger.warning("Client %s timed out while"
1785
" waiting for approval",
1786
client.name)
1787
if self.server.use_dbus:
1788
# Emit D-Bus signal
1789
client.Rejected("Approval timed out")
1790
return
1791
else:
1792
break
1793
else:
1794
delay -= time2 - time
1795
1796
sent_size = 0
1797
while sent_size < len(client.secret):
1798
try:
1799
sent = session.send(client.secret[sent_size:])
1800
except gnutls.errors.GNUTLSError as error:
1801
logger.warning("gnutls send failed",
1802
exc_info=error)
1803
return
1804
logger.debug("Sent: %d, remaining: %d",
1805
sent, len(client.secret)
1806
- (sent_size + sent))
1807
sent_size += sent
1808
1809
logger.info("Sending secret to %s", client.name)
1810
# bump the timeout using extended_timeout
1811
client.bump_timeout(client.extended_timeout)
1812
if self.server.use_dbus:
1813
# Emit D-Bus signal
1814
client.GotSecret()
1815
1816
finally:
1817
if approval_required:
1818
client.approvals_pending -= 1
1819
try:
1820
session.bye()
1821
except gnutls.errors.GNUTLSError as error:
1822
logger.warning("GnuTLS bye failed",
1823
exc_info=error)
1824
1825
@staticmethod
1826
def peer_certificate(session):
1827
"Return the peer's OpenPGP certificate as a bytestring"
1828
# If not an OpenPGP certificate...
1829
if (gnutls.library.functions
1830
.gnutls_certificate_type_get(session._c_object)
1831
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1832
# ...do the normal thing
1833
return session.peer_certificate
1834
list_size = ctypes.c_uint(1)
1835
cert_list = (gnutls.library.functions
1836
.gnutls_certificate_get_peers
1837
(session._c_object, ctypes.byref(list_size)))
1838
if not bool(cert_list) and list_size.value != 0:
1839
raise gnutls.errors.GNUTLSError("error getting peer"
1840
" certificate")
1841
if list_size.value == 0:
1842
return None
1843
cert = cert_list[0]
1844
return ctypes.string_at(cert.data, cert.size)
1845
1846
@staticmethod
1847
def fingerprint(openpgp):
1848
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1849
# New GnuTLS "datum" with the OpenPGP public key
1850
datum = (gnutls.library.types
1851
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1852
ctypes.POINTER
1853
(ctypes.c_ubyte)),
1854
ctypes.c_uint(len(openpgp))))
1855
# New empty GnuTLS certificate
1856
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1857
(gnutls.library.functions
1858
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1859
# Import the OpenPGP public key into the certificate
1860
(gnutls.library.functions
1861
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1862
gnutls.library.constants
1863
.GNUTLS_OPENPGP_FMT_RAW))
1864
# Verify the self signature in the key
1865
crtverify = ctypes.c_uint()
1866
(gnutls.library.functions
1867
.gnutls_openpgp_crt_verify_self(crt, 0,
1868
ctypes.byref(crtverify)))
1869
if crtverify.value != 0:
1870
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1871
raise (gnutls.errors.CertificateSecurityError
1872
("Verify failed"))
1873
# New buffer for the fingerprint
1874
buf = ctypes.create_string_buffer(20)
1875
buf_len = ctypes.c_size_t()
1876
# Get the fingerprint from the certificate into the buffer
1877
(gnutls.library.functions
1878
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1879
ctypes.byref(buf_len)))
1880
# Deinit the certificate
1881
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1882
# Convert the buffer to a Python bytestring
1883
fpr = ctypes.string_at(buf, buf_len.value)
1884
# Convert the bytestring to hexadecimal notation
1885
hex_fpr = binascii.hexlify(fpr).upper()
1886
return hex_fpr
1887
1888
1889
class MultiprocessingMixIn(object):
1890
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1891
def sub_process_main(self, request, address):
1892
try:
1893
self.finish_request(request, address)
1894
except Exception:
1895
self.handle_error(request, address)
1896
self.close_request(request)
1897
1898
def process_request(self, request, address):
1899
"""Start a new process to process the request."""
1900
proc = multiprocessing.Process(target = self.sub_process_main,
1901
args = (request, address))
1902
proc.start()
1903
return proc
1904
1905
1906
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1907
""" adds a pipe to the MixIn """
1908
def process_request(self, request, client_address):
1909
"""Overrides and wraps the original process_request().
1910
1911
This function creates a new pipe in self.pipe
1912
"""
1913
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1914
1915
proc = MultiprocessingMixIn.process_request(self, request,
1916
client_address)
1917
self.child_pipe.close()
1918
self.add_pipe(parent_pipe, proc)
1919
1920
def add_pipe(self, parent_pipe, proc):
1921
"""Dummy function; override as necessary"""
1922
raise NotImplementedError()
1923
1924
1925
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1926
socketserver.TCPServer, object):
1927
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1928
518
1929
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1930
enabled: Boolean; whether this server is activated yet
1931
interface: None or a network interface name (string)
1932
use_ipv6: Boolean; to use IPv6 or not
522
1933
"""
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
1934
def __init__(self, server_address, RequestHandlerClass,
1935
interface=None, use_ipv6=True, socketfd=None):
1936
"""If socketfd is set, use that file descriptor instead of
1937
creating a new one with socket.socket().
1938
"""
1939
self.interface = interface
1940
if use_ipv6:
1941
self.address_family = socket.AF_INET6
1942
if socketfd is not None:
1943
# Save the file descriptor
1944
self.socketfd = socketfd
1945
# Save the original socket.socket() function
1946
self.socket_socket = socket.socket
1947
# To implement --socket, we monkey patch socket.socket.
1948
#
1949
# (When socketserver.TCPServer is a new-style class, we
1950
# could make self.socket into a property instead of monkey
1951
# patching socket.socket.)
1952
#
1953
# Create a one-time-only replacement for socket.socket()
1954
@functools.wraps(socket.socket)
1955
def socket_wrapper(*args, **kwargs):
1956
# Restore original function so subsequent calls are
1957
# not affected.
1958
socket.socket = self.socket_socket
1959
del self.socket_socket
1960
# This time only, return a new socket object from the
1961
# saved file descriptor.
1962
return socket.fromfd(self.socketfd, *args, **kwargs)
1963
# Replace socket.socket() function with wrapper
1964
socket.socket = socket_wrapper
1965
# The socketserver.TCPServer.__init__ will call
1966
# socket.socket(), which might be our replacement,
1967
# socket_wrapper(), if socketfd was set.
1968
socketserver.TCPServer.__init__(self, server_address,
1969
RequestHandlerClass)
1970
533
1971
def server_bind(self):
534
1972
"""This overrides the normal server_bind() function
535
1973
to bind to an interface if one was specified, and also NOT to
536
1974
bind to an address or port if they were not specified."""
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
1975
if self.interface is not None:
1976
if SO_BINDTODEVICE is None:
1977
logger.error("SO_BINDTODEVICE does not exist;"
1978
" cannot bind to interface %s",
1979
self.interface)
1980
else:
1981
try:
1982
self.socket.setsockopt(socket.SOL_SOCKET,
1983
SO_BINDTODEVICE,
1984
(self.interface + "\0")
1985
.encode("utf-8"))
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1991
logger.error("SO_BINDTODEVICE not available;"
1992
" cannot bind to interface %s",
1993
self.interface)
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
1997
else:
1998
raise
551
1999
# Only bind(2) the socket if we really need to.
552
2000
if self.server_address[0] or self.server_address[1]:
553
2001
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
2002
if self.address_family == socket.AF_INET6:
2003
any_address = "::" # in6addr_any
2004
else:
2005
any_address = "0.0.0.0" # INADDR_ANY
2006
self.server_address = (any_address,
556
2007
self.server_address[1])
557
2008
elif not self.server_address[1]:
558
2009
self.server_address = (self.server_address[0],
559
2010
0)
560
# if self.settings["interface"]:
2011
# if self.interface:
561
2012
# self.server_address = (self.server_address[0],
562
2013
# 0, # port
563
2014
# 0, # flowinfo
564
2015
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
2016
# (self.interface))
2017
return socketserver.TCPServer.server_bind(self)
2018
2019
2020
class MandosServer(IPv6_TCPServer):
2021
"""Mandos server.
2022
2023
Attributes:
2024
clients: set of Client objects
2025
gnutls_priority GnuTLS priority string
2026
use_dbus: Boolean; to emit D-Bus signals or not
2027
2028
Assumes a gobject.MainLoop event loop.
2029
"""
2030
def __init__(self, server_address, RequestHandlerClass,
2031
interface=None, use_ipv6=True, clients=None,
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
2033
self.enabled = False
2034
self.clients = clients
2035
if self.clients is None:
2036
self.clients = {}
2037
self.use_dbus = use_dbus
2038
self.gnutls_priority = gnutls_priority
2039
IPv6_TCPServer.__init__(self, server_address,
2040
RequestHandlerClass,
2041
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
568
2044
def server_activate(self):
569
2045
if self.enabled:
570
return super(type(self), self).server_activate()
2046
return socketserver.TCPServer.server_activate(self)
2047
571
2048
def enable(self):
572
2049
self.enabled = True
2050
2051
def add_pipe(self, parent_pipe, proc):
2052
# Call "handle_ipc" for both data and EOF events
2053
gobject.io_add_watch(parent_pipe.fileno(),
2054
gobject.IO_IN | gobject.IO_HUP,
2055
functools.partial(self.handle_ipc,
2056
parent_pipe =
2057
parent_pipe,
2058
proc = proc))
2059
2060
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2062
# error, or the other end of multiprocessing.Pipe has closed
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
# Wait for other process to exit
2065
proc.join()
2066
return False
2067
2068
# Read a request from the child
2069
request = parent_pipe.recv()
2070
command = request[0]
2071
2072
if command == 'init':
2073
fpr = request[1]
2074
address = request[2]
2075
2076
for c in self.clients.itervalues():
2077
if c.fingerprint == fpr:
2078
client = c
2079
break
2080
else:
2081
logger.info("Client not found for fingerprint: %s, ad"
2082
"dress: %s", fpr, address)
2083
if self.use_dbus:
2084
# Emit D-Bus signal
2085
mandos_dbus_service.ClientNotFound(fpr,
2086
address[0])
2087
parent_pipe.send(False)
2088
return False
2089
2090
gobject.io_add_watch(parent_pipe.fileno(),
2091
gobject.IO_IN | gobject.IO_HUP,
2092
functools.partial(self.handle_ipc,
2093
parent_pipe =
2094
parent_pipe,
2095
proc = proc,
2096
client_object =
2097
client))
2098
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2100
# same fileno
2101
return False
2102
if command == 'funcall':
2103
funcname = request[1]
2104
args = request[2]
2105
kwargs = request[3]
2106
2107
parent_pipe.send(('data', getattr(client_object,
2108
funcname)(*args,
2109
**kwargs)))
2110
2111
if command == 'getattr':
2112
attrname = request[1]
2113
if callable(client_object.__getattribute__(attrname)):
2114
parent_pipe.send(('function',))
2115
else:
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
2118
2119
if command == 'setattr':
2120
attrname = request[1]
2121
value = request[2]
2122
setattr(client_object, attrname, value)
2123
2124
return True
2125
2126
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2144
"""
2145
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2152
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2158
# containing digits
2159
"value", # datetime.timedelta or
2160
# None
2161
"followers")) # Tokens valid after
2162
# this token
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2176
None,
2177
frozenset((token_hour, token_minute,
2178
token_second)))
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2194
token_week)))
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2197
found_token = None
2198
followers = frozenset((token_duration,)) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2206
# Token found
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2214
# Go to found token
2215
found_token = token
2216
# Set valid next tokens
2217
followers = found_token.followers
2218
break
2219
else:
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
2222
# End token found
2223
return value
573
2224
574
2225
575
2226
def string_to_delta(interval):
576
2227
"""Parse a string and return a datetime.timedelta
577
2228
578
2229
>>> string_to_delta('7d')
579
2230
datetime.timedelta(7)
580
2231
>>> string_to_delta('60s')
583
2234
datetime.timedelta(0, 3600)
584
2235
>>> string_to_delta('24h')
585
2236
datetime.timedelta(1)
586
>>> string_to_delta(u'1w')
2237
>>> string_to_delta('1w')
587
2238
datetime.timedelta(7)
588
2239
>>> string_to_delta('5m 30s')
589
2240
datetime.timedelta(0, 330)
590
2241
"""
2242
2243
try:
2244
return rfc3339_duration_to_delta(interval)
2245
except ValueError:
2246
pass
2247
591
2248
timevalue = datetime.timedelta(0)
592
2249
for s in interval.split():
593
2250
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
2251
suffix = s[-1]
2252
value = int(s[:-1])
2253
if suffix == "d":
597
2254
delta = datetime.timedelta(value)
598
elif suffix == u"s":
2255
elif suffix == "s":
599
2256
delta = datetime.timedelta(0, value)
600
elif suffix == u"m":
2257
elif suffix == "m":
601
2258
delta = datetime.timedelta(0, 0, 0, 0, value)
602
elif suffix == u"h":
2259
elif suffix == "h":
603
2260
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
604
elif suffix == u"w":
2261
elif suffix == "w":
605
2262
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
2263
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
2264
raise ValueError("Unknown suffix {!r}"
2265
.format(suffix))
2266
except IndexError as e:
2267
raise ValueError(*(e.args))
610
2268
timevalue += delta
611
2269
return timevalue
612
2270
613
2271
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
637
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
639
global if_nametoindex
640
try:
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
645
except (OSError, AttributeError):
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
650
def if_nametoindex(interface):
651
"Get an interface index the hard way, i.e. using fcntl()"
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
658
return interface_index
659
return if_nametoindex(interface)
660
661
662
2272
def daemon(nochdir = False, noclose = False):
663
2273
"""See daemon(3). Standard BSD Unix function.
2274
664
2275
This should really exist as os.daemon, but it doesn't (yet)."""
665
2276
if os.fork():
666
2277
sys.exit()
671
2282
sys.exit()
672
2283
if not noclose:
673
2284
# Close all standard open file descriptors
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2285
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
675
2286
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
2287
raise OSError(errno.ENODEV, "{} not a character device"
2288
.format(os.devnull))
678
2289
os.dup2(null, sys.stdin.fileno())
679
2290
os.dup2(null, sys.stdout.fileno())
680
2291
os.dup2(null, sys.stderr.fileno())
683
2294
684
2295
685
2296
def main():
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
2297
2298
##################################################################
2299
# Parsing of options, both command line and config file
2300
2301
parser = argparse.ArgumentParser()
2302
parser.add_argument("-v", "--version", action="version",
2303
version = "%(prog)s {}".format(version),
2304
help="show version number and exit")
2305
parser.add_argument("-i", "--interface", metavar="IF",
2306
help="Bind to interface IF")
2307
parser.add_argument("-a", "--address",
2308
help="Address to listen for requests on")
2309
parser.add_argument("-p", "--port", type=int,
2310
help="Port number to receive requests on")
2311
parser.add_argument("--check", action="store_true",
2312
help="Run self-test")
2313
parser.add_argument("--debug", action="store_true",
2314
help="Debug mode; run in foreground and log"
2315
" to terminal", default=None)
2316
parser.add_argument("--debuglevel", metavar="LEVEL",
2317
help="Debug level for stdout output")
2318
parser.add_argument("--priority", help="GnuTLS"
2319
" priority string (see GnuTLS documentation)")
2320
parser.add_argument("--servicename",
2321
metavar="NAME", help="Zeroconf service name")
2322
parser.add_argument("--configdir",
2323
default="/etc/mandos", metavar="DIR",
2324
help="Directory to search for configuration"
2325
" files")
2326
parser.add_argument("--no-dbus", action="store_false",
2327
dest="use_dbus", help="Do not provide D-Bus"
2328
" system bus interface", default=None)
2329
parser.add_argument("--no-ipv6", action="store_false",
2330
dest="use_ipv6", help="Do not use IPv6",
2331
default=None)
2332
parser.add_argument("--no-restore", action="store_false",
2333
dest="restore", help="Do not restore stored"
2334
" state", default=None)
2335
parser.add_argument("--socket", type=int,
2336
help="Specify a file descriptor to a network"
2337
" socket to use instead of creating one")
2338
parser.add_argument("--statedir", metavar="DIR",
2339
help="Directory to save/restore state in")
2340
parser.add_argument("--foreground", action="store_true",
2341
help="Run in foreground", default=None)
2342
parser.add_argument("--no-zeroconf", action="store_false",
2343
dest="zeroconf", help="Do not use Zeroconf",
2344
default=None)
2345
2346
options = parser.parse_args()
710
2347
711
2348
if options.check:
712
2349
import doctest
713
doctest.testmod()
714
sys.exit()
2350
fail_count, test_count = doctest.testmod()
2351
sys.exit(os.EX_OK if fail_count == 0 else 1)
715
2352
716
2353
# Default values for config file for server-global settings
717
2354
server_defaults = { "interface": "",
719
2356
"port": "",
720
2357
"debug": "False",
721
2358
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2359
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2360
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
723
2361
"servicename": "Mandos",
2362
"use_dbus": "True",
2363
"use_ipv6": "True",
2364
"debuglevel": "",
2365
"restore": "True",
2366
"socket": "",
2367
"statedir": "/var/lib/mandos",
2368
"foreground": "False",
2369
"zeroconf": "True",
724
2370
}
725
2371
726
2372
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
2373
server_config = configparser.SafeConfigParser(server_defaults)
728
2374
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2375
server_config.read(os.path.join(options.configdir,
2376
"mandos.conf"))
730
2377
# Convert the SafeConfigParser object to a dict
731
2378
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
2379
# Use the appropriate methods on the non-string config options
2380
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2381
server_settings[option] = server_config.getboolean("DEFAULT",
2382
option)
2383
if server_settings["port"]:
2384
server_settings["port"] = server_config.getint("DEFAULT",
2385
"port")
2386
if server_settings["socket"]:
2387
server_settings["socket"] = server_config.getint("DEFAULT",
2388
"socket")
2389
# Later, stdin will, and stdout and stderr might, be dup'ed
2390
# over with an opened os.devnull. But we don't want this to
2391
# happen with a supplied network socket.
2392
if 0 <= server_settings["socket"] <= 2:
2393
server_settings["socket"] = os.dup(server_settings
2394
["socket"])
735
2395
del server_config
736
2396
737
2397
# Override the settings from the config file with command line
738
2398
# options, if set.
739
2399
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
2400
"priority", "servicename", "configdir",
2401
"use_dbus", "use_ipv6", "debuglevel", "restore",
2402
"statedir", "socket", "foreground", "zeroconf"):
741
2403
value = getattr(options, option)
742
2404
if value is not None:
743
2405
server_settings[option] = value
744
2406
del options
2407
# Force all strings to be unicode
2408
for option in server_settings.keys():
2409
if isinstance(server_settings[option], bytes):
2410
server_settings[option] = (server_settings[option]
2411
.decode("utf-8"))
2412
# Force all boolean options to be boolean
2413
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2414
"foreground", "zeroconf"):
2415
server_settings[option] = bool(server_settings[option])
2416
# Debug implies foreground
2417
if server_settings["debug"]:
2418
server_settings["foreground"] = True
745
2419
# Now we have our good server settings in "server_settings"
746
2420
2421
##################################################################
2422
2423
if (not server_settings["zeroconf"] and
2424
not (server_settings["port"]
2425
or server_settings["socket"] != "")):
2426
parser.error("Needs port or socket to work without"
2427
" Zeroconf")
2428
2429
# For convenience
747
2430
debug = server_settings["debug"]
2431
debuglevel = server_settings["debuglevel"]
2432
use_dbus = server_settings["use_dbus"]
2433
use_ipv6 = server_settings["use_ipv6"]
2434
stored_state_path = os.path.join(server_settings["statedir"],
2435
stored_state_file)
2436
foreground = server_settings["foreground"]
2437
zeroconf = server_settings["zeroconf"]
748
2438
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
2439
if debug:
2440
initlogger(debug, logging.DEBUG)
2441
else:
2442
if not debuglevel:
2443
initlogger(debug)
2444
else:
2445
level = getattr(logging, debuglevel.upper())
2446
initlogger(debug, level)
752
2447
753
2448
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
2449
syslogger.setFormatter(logging.Formatter
2450
('Mandos ({}) [%(process)d]:'
2451
' %(levelname)s: %(message)s'
2452
.format(server_settings
2453
["servicename"])))
758
2454
759
2455
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
764
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
2456
client_config = configparser.SafeConfigParser(Client
2457
.client_defaults)
766
2458
client_config.read(os.path.join(server_settings["configdir"],
767
2459
"clients.conf"))
768
2460
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
2461
global mandos_dbus_service
2462
mandos_dbus_service = None
2463
2464
socketfd = None
2465
if server_settings["socket"] != "":
2466
socketfd = server_settings["socket"]
2467
tcp_server = MandosServer((server_settings["address"],
2468
server_settings["port"]),
2469
ClientHandler,
2470
interface=(server_settings["interface"]
2471
or None),
2472
use_ipv6=use_ipv6,
2473
gnutls_priority=
2474
server_settings["priority"],
2475
use_dbus=use_dbus,
2476
socketfd=socketfd)
2477
if not foreground:
2478
pidfilename = "/run/mandos.pid"
2479
if not os.path.isdir("/run/."):
2480
pidfilename = "/var/run/mandos.pid"
2481
pidfile = None
2482
try:
2483
pidfile = open(pidfilename, "w")
2484
except IOError as e:
2485
logger.error("Could not open file %r", pidfilename,
2486
exc_info=e)
2487
2488
for name in ("_mandos", "mandos", "nobody"):
2489
try:
2490
uid = pwd.getpwnam(name).pw_uid
2491
gid = pwd.getpwnam(name).pw_gid
2492
break
2493
except KeyError:
2494
continue
2495
else:
2496
uid = 65534
2497
gid = 65534
2498
try:
2499
os.setgid(gid)
798
2500
os.setuid(uid)
799
os.setgid(gid)
800
except OSError, error:
801
if error[0] != errno.EPERM:
802
raise error
803
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
2501
except OSError as error:
2502
if error.errno != errno.EPERM:
2503
raise
2504
2505
if debug:
2506
# Enable all possible GnuTLS debugging
2507
2508
# "Use a log level over 10 to enable all debugging options."
2509
# - GnuTLS manual
2510
gnutls.library.functions.gnutls_global_set_log_level(11)
2511
2512
@gnutls.library.types.gnutls_log_func
2513
def debug_gnutls(level, string):
2514
logger.debug("GnuTLS: %s", string[:-1])
2515
2516
(gnutls.library.functions
2517
.gnutls_global_set_log_function(debug_gnutls))
2518
2519
# Redirect stdin so all checkers get /dev/null
2520
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2521
os.dup2(null, sys.stdin.fileno())
2522
if null > 2:
2523
os.close(null)
2524
2525
# Need to fork before connecting to D-Bus
2526
if not foreground:
2527
# Close all input and output, do double fork, etc.
2528
daemon()
2529
2530
# multiprocessing will use threads, so before we use gobject we
2531
# need to inform gobject that threads will be used.
2532
gobject.threads_init()
810
2533
811
2534
global main_loop
812
global bus
813
global server
814
2535
# From the Avahi example code
815
DBusGMainLoop(set_as_default=True )
2536
DBusGMainLoop(set_as_default=True)
816
2537
main_loop = gobject.MainLoop()
817
2538
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
2539
# End of Avahi example code
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
837
838
if debug:
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
842
if null > 2:
843
os.close(null)
844
else:
845
# No console logging
846
logger.removeHandler(console)
847
# Close all input and output, do double fork, etc.
848
daemon()
849
850
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
2540
if use_dbus:
2541
try:
2542
bus_name = dbus.service.BusName("se.recompile.Mandos",
2543
bus, do_not_queue=True)
2544
old_bus_name = (dbus.service.BusName
2545
("se.bsnet.fukt.Mandos", bus,
2546
do_not_queue=True))
2547
except dbus.exceptions.NameExistsException as e:
2548
logger.error("Disabling D-Bus:", exc_info=e)
2549
use_dbus = False
2550
server_settings["use_dbus"] = False
2551
tcp_server.use_dbus = False
2552
if zeroconf:
2553
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2554
service = AvahiServiceToSyslog(name =
2555
server_settings["servicename"],
2556
servicetype = "_mandos._tcp",
2557
protocol = protocol, bus = bus)
2558
if server_settings["interface"]:
2559
service.interface = (if_nametoindex
2560
(server_settings["interface"]
2561
.encode("utf-8")))
2562
2563
global multiprocessing_manager
2564
multiprocessing_manager = multiprocessing.Manager()
2565
2566
client_class = Client
2567
if use_dbus:
2568
client_class = functools.partial(ClientDBus, bus = bus)
2569
2570
client_settings = Client.config_parser(client_config)
2571
old_client_settings = {}
2572
clients_data = {}
2573
2574
# This is used to redirect stdout and stderr for checker processes
2575
global wnull
2576
wnull = open(os.devnull, "w") # A writable /dev/null
2577
# Only used if server is running in foreground but not in debug
2578
# mode
2579
if debug or not foreground:
2580
wnull.close()
2581
2582
# Get client data and settings from last running state.
2583
if server_settings["restore"]:
2584
try:
2585
with open(stored_state_path, "rb") as stored_state:
2586
clients_data, old_client_settings = (pickle.load
2587
(stored_state))
2588
os.remove(stored_state_path)
2589
except IOError as e:
2590
if e.errno == errno.ENOENT:
2591
logger.warning("Could not load persistent state: {}"
2592
.format(os.strerror(e.errno)))
2593
else:
2594
logger.critical("Could not load persistent state:",
2595
exc_info=e)
2596
raise
2597
except EOFError as e:
2598
logger.warning("Could not load persistent state: "
2599
"EOFError:", exc_info=e)
2600
2601
with PGPEngine() as pgp:
2602
for client_name, client in clients_data.items():
2603
# Skip removed clients
2604
if client_name not in client_settings:
2605
continue
2606
2607
# Decide which value to use after restoring saved state.
2608
# We have three different values: Old config file,
2609
# new config file, and saved state.
2610
# New config value takes precedence if it differs from old
2611
# config value, otherwise use saved state.
2612
for name, value in client_settings[client_name].items():
2613
try:
2614
# For each value in new config, check if it
2615
# differs from the old config value (Except for
2616
# the "secret" attribute)
2617
if (name != "secret" and
2618
value != old_client_settings[client_name]
2619
[name]):
2620
client[name] = value
2621
except KeyError:
2622
pass
2623
2624
# Clients who has passed its expire date can still be
2625
# enabled if its last checker was successful. Clients
2626
# whose checker succeeded before we stored its state is
2627
# assumed to have successfully run all checkers during
2628
# downtime.
2629
if client["enabled"]:
2630
if datetime.datetime.utcnow() >= client["expires"]:
2631
if not client["last_checked_ok"]:
2632
logger.warning(
2633
"disabling client {} - Client never "
2634
"performed a successful checker"
2635
.format(client_name))
2636
client["enabled"] = False
2637
elif client["last_checker_status"] != 0:
2638
logger.warning(
2639
"disabling client {} - Client last"
2640
" checker failed with error code {}"
2641
.format(client_name,
2642
client["last_checker_status"]))
2643
client["enabled"] = False
2644
else:
2645
client["expires"] = (datetime.datetime
2646
.utcnow()
2647
+ client["timeout"])
2648
logger.debug("Last checker succeeded,"
2649
" keeping {} enabled"
2650
.format(client_name))
2651
try:
2652
client["secret"] = (
2653
pgp.decrypt(client["encrypted_secret"],
2654
client_settings[client_name]
2655
["secret"]))
2656
except PGPError:
2657
# If decryption fails, we use secret from new settings
2658
logger.debug("Failed to decrypt {} old secret"
2659
.format(client_name))
2660
client["secret"] = (
2661
client_settings[client_name]["secret"])
2662
2663
# Add/remove clients based on new changes made to config
2664
for client_name in (set(old_client_settings)
2665
- set(client_settings)):
2666
del clients_data[client_name]
2667
for client_name in (set(client_settings)
2668
- set(old_client_settings)):
2669
clients_data[client_name] = client_settings[client_name]
2670
2671
# Create all client objects
2672
for client_name, client in clients_data.items():
2673
tcp_server.clients[client_name] = client_class(
2674
name = client_name, settings = client,
2675
server_settings = server_settings)
2676
2677
if not tcp_server.clients:
2678
logger.warning("No clients defined")
2679
2680
if not foreground:
2681
if pidfile is not None:
2682
try:
2683
with pidfile:
2684
pid = os.getpid()
2685
pidfile.write("{}\n".format(pid).encode("utf-8"))
2686
except IOError:
2687
logger.error("Could not write to file %r with PID %d",
2688
pidfilename, pid)
854
2689
del pidfile
855
except IOError, err:
856
logger.error(u"Could not write to file %r with PID %d",
857
pidfilename, pid)
858
except NameError:
859
# "pidfile" was never created
860
pass
861
del pidfilename
2690
del pidfilename
2691
2692
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2693
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2694
2695
if use_dbus:
2696
@alternate_dbus_interfaces({"se.recompile.Mandos":
2697
"se.bsnet.fukt.Mandos"})
2698
class MandosDBusService(DBusObjectWithProperties):
2699
"""A D-Bus proxy object"""
2700
def __init__(self):
2701
dbus.service.Object.__init__(self, bus, "/")
2702
_interface = "se.recompile.Mandos"
2703
2704
@dbus_interface_annotations(_interface)
2705
def _foo(self):
2706
return { "org.freedesktop.DBus.Property"
2707
".EmitsChangedSignal":
2708
"false"}
2709
2710
@dbus.service.signal(_interface, signature="o")
2711
def ClientAdded(self, objpath):
2712
"D-Bus signal"
2713
pass
2714
2715
@dbus.service.signal(_interface, signature="ss")
2716
def ClientNotFound(self, fingerprint, address):
2717
"D-Bus signal"
2718
pass
2719
2720
@dbus.service.signal(_interface, signature="os")
2721
def ClientRemoved(self, objpath, name):
2722
"D-Bus signal"
2723
pass
2724
2725
@dbus.service.method(_interface, out_signature="ao")
2726
def GetAllClients(self):
2727
"D-Bus method"
2728
return dbus.Array(c.dbus_object_path
2729
for c in
2730
tcp_server.clients.itervalues())
2731
2732
@dbus.service.method(_interface,
2733
out_signature="a{oa{sv}}")
2734
def GetAllClientsWithProperties(self):
2735
"D-Bus method"
2736
return dbus.Dictionary(
2737
{ c.dbus_object_path: c.GetAll("")
2738
for c in tcp_server.clients.itervalues() },
2739
signature="oa{sv}")
2740
2741
@dbus.service.method(_interface, in_signature="o")
2742
def RemoveClient(self, object_path):
2743
"D-Bus method"
2744
for c in tcp_server.clients.itervalues():
2745
if c.dbus_object_path == object_path:
2746
del tcp_server.clients[c.name]
2747
c.remove_from_connection()
2748
# Don't signal anything except ClientRemoved
2749
c.disable(quiet=True)
2750
# Emit D-Bus signal
2751
self.ClientRemoved(object_path, c.name)
2752
return
2753
raise KeyError(object_path)
2754
2755
del _interface
2756
2757
mandos_dbus_service = MandosDBusService()
862
2758
863
2759
def cleanup():
864
2760
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
871
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
2761
if zeroconf:
2762
service.cleanup()
2763
2764
multiprocessing.active_children()
2765
wnull.close()
2766
if not (tcp_server.clients or client_settings):
2767
return
2768
2769
# Store client before exiting. Secrets are encrypted with key
2770
# based on what config file has. If config file is
2771
# removed/edited, old secret will thus be unrecovable.
2772
clients = {}
2773
with PGPEngine() as pgp:
2774
for client in tcp_server.clients.itervalues():
2775
key = client_settings[client.name]["secret"]
2776
client.encrypted_secret = pgp.encrypt(client.secret,
2777
key)
2778
client_dict = {}
2779
2780
# A list of attributes that can not be pickled
2781
# + secret.
2782
exclude = { "bus", "changedstate", "secret",
2783
"checker", "server_settings" }
2784
for name, typ in (inspect.getmembers
2785
(dbus.service.Object)):
2786
exclude.add(name)
2787
2788
client_dict["encrypted_secret"] = (client
2789
.encrypted_secret)
2790
for attr in client.client_structure:
2791
if attr not in exclude:
2792
client_dict[attr] = getattr(client, attr)
2793
2794
clients[client.name] = client_dict
2795
del client_settings[client.name]["secret"]
2796
2797
try:
2798
with (tempfile.NamedTemporaryFile
2799
(mode='wb', suffix=".pickle", prefix='clients-',
2800
dir=os.path.dirname(stored_state_path),
2801
delete=False)) as stored_state:
2802
pickle.dump((clients, client_settings), stored_state)
2803
tempname=stored_state.name
2804
os.rename(tempname, stored_state_path)
2805
except (IOError, OSError) as e:
2806
if not debug:
2807
try:
2808
os.remove(tempname)
2809
except NameError:
2810
pass
2811
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2812
logger.warning("Could not save persistent state: {}"
2813
.format(os.strerror(e.errno)))
2814
else:
2815
logger.warning("Could not save persistent state:",
2816
exc_info=e)
2817
raise
2818
2819
# Delete all clients, and settings from config
2820
while tcp_server.clients:
2821
name, client = tcp_server.clients.popitem()
2822
if use_dbus:
2823
client.remove_from_connection()
2824
# Don't signal anything except ClientRemoved
2825
client.disable(quiet=True)
2826
if use_dbus:
2827
# Emit D-Bus signal
2828
mandos_dbus_service.ClientRemoved(client
2829
.dbus_object_path,
2830
client.name)
2831
client_settings.clear()
876
2832
877
2833
atexit.register(cleanup)
878
2834
879
if not debug:
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
884
for client in clients:
885
client.start()
2835
for client in tcp_server.clients.itervalues():
2836
if use_dbus:
2837
# Emit D-Bus signal
2838
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2839
# Need to initiate checking of clients
2840
if client.enabled:
2841
client.init_checker()
886
2842
887
2843
tcp_server.enable()
888
2844
tcp_server.server_activate()
889
2845
890
2846
# Find out what port we got
891
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
2847
if zeroconf:
2848
service.port = tcp_server.socket.getsockname()[1]
2849
if use_ipv6:
2850
logger.info("Now listening on address %r, port %d,"
2851
" flowinfo %d, scope_id %d",
2852
*tcp_server.socket.getsockname())
2853
else: # IPv4
2854
logger.info("Now listening on address %r, port %d",
2855
*tcp_server.socket.getsockname())
894
2856
895
2857
#service.interface = tcp_server.socket.getsockname()[3]
896
2858
897
2859
try:
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
try:
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
904
sys.exit(1)
905
# End of Avahi example code
2860
if zeroconf:
2861
# From the Avahi example code
2862
try:
2863
service.activate()
2864
except dbus.exceptions.DBusException as error:
2865
logger.critical("D-Bus Exception", exc_info=error)
2866
cleanup()
2867
sys.exit(1)
2868
# End of Avahi example code
906
2869
907
2870
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
2871
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2872
(tcp_server.handle_request
2873
(*args[2:], **kwargs) or True))
911
2874
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
2875
logger.debug("Starting main loop")
914
2876
main_loop.run()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2877
except AvahiError as error:
2878
logger.critical("Avahi Error", exc_info=error)
2879
cleanup()
917
2880
sys.exit(1)
918
2881
except KeyboardInterrupt:
919
2882
if debug:
920
print
2883
print("", file=sys.stderr)
2884
logger.debug("Server received KeyboardInterrupt")
2885
logger.debug("Server exiting")
2886
# Must run before the D-Bus bus name gets deregistered
2887
cleanup()
921
2888
922
2889
if __name__ == '__main__':
923
2890
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0