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- Committer: Teddy Hogeborn
- Date: 2011-11-26 19:08:37 UTC
- mto: (518.2.5 persistent-state-gpgme)
- mto: This revision was merged to the branch mainline in revision 524.
- Revision ID: teddy@recompile.se-20111126190837-wyn24lekil5q6jiq
* mandos: Fix whitespace.
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files removed:
- etc-plugins.d-README
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
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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,
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# and some lines in "main".
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@fukt.bsnet.se>.
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# Contact the authors at <mandos@recompile.se>.
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#
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from __future__ import division
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from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
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36
35
import SocketServer
37
import SocketServer as socketserver
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import socket
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import select
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from optparse import OptionParser
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import argparse
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import datetime
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import errno
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import gnutls.crypto
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import gnutls.library.functions
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import gnutls.library.constants
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import gnutls.library.types
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import ConfigParser
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import ConfigParser as configparser
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import sys
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import re
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import os
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import signal
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from sets import Set
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import subprocess
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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
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import cPickle as pickle
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import multiprocessing
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import types
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import hashlib
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67
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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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import ctypes
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version = "1.0"
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logger = logging.Logger('mandos')
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syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
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syslogger.setFormatter(logging.Formatter\
73
('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:'
78
' %(message)s'))
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logger.addHandler(console)
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import ctypes.util
75
import xml.dom.minidom
76
import inspect
77
import Crypto.Cipher.AES
78
79
try:
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
except AttributeError:
82
try:
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from IN import SO_BINDTODEVICE
84
except ImportError:
85
SO_BINDTODEVICE = None
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version = "1.4.1"
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stored_state_path = "/var/lib/mandos/clients.pickle"
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logger = logging.getLogger()
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
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ifreq[16:20])[0]
110
return interface_index
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112
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def initlogger(level=logging.WARNING):
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"""init logger and add loglevel"""
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syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
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121
console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
127
logger.setLevel(level)
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80
129
81
130
class AvahiError(Exception):
82
def __init__(self, value):
131
def __init__(self, value, *args, **kwargs):
83
132
self.value = value
84
def __str__(self):
85
return repr(self.value)
133
super(AvahiError, self).__init__(value, *args, **kwargs)
134
def __unicode__(self):
135
return unicode(repr(self.value))
86
136
87
137
class AvahiServiceError(AvahiError):
88
138
pass
93
143
94
144
class AvahiService(object):
95
145
"""An Avahi (Zeroconf) service.
146
96
147
Attributes:
97
148
interface: integer; avahi.IF_UNSPEC or an interface index.
98
149
Used to optionally bind to the specified interface.
106
157
max_renames: integer; maximum number of renames
107
158
rename_count: integer; counter so we only rename after collisions
108
159
a sensible number of times
160
group: D-Bus Entry Group
161
server: D-Bus Server
162
bus: dbus.SystemBus()
109
163
"""
110
164
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
165
servicetype = None, port = None, TXT = None,
166
domain = "", host = "", max_renames = 32768,
167
protocol = avahi.PROTO_UNSPEC, bus = None):
113
168
self.interface = interface
114
169
self.name = name
115
self.type = type
170
self.type = servicetype
116
171
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
172
self.TXT = TXT if TXT is not None else []
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self.domain = domain
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174
self.host = host
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175
self.rename_count = 0
124
176
self.max_renames = max_renames
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self.protocol = protocol
178
self.group = None # our entry group
179
self.server = None
180
self.bus = bus
181
self.entry_group_state_changed_match = None
125
182
def rename(self):
126
183
"""Derived from the Avahi example code"""
127
184
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)
185
logger.critical("No suitable Zeroconf service name found"
186
" after %i retries, exiting.",
187
self.rename_count)
131
188
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))
189
self.name = unicode(self.server
190
.GetAlternativeServiceName(self.name))
191
logger.info("Changing Zeroconf service name to %r ...",
192
self.name)
138
193
self.remove()
139
self.add()
194
try:
195
self.add()
196
except dbus.exceptions.DBusException as error:
197
logger.critical("DBusException: %s", error)
198
self.cleanup()
199
os._exit(1)
140
200
self.rename_count += 1
141
201
def remove(self):
142
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"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
203
if self.entry_group_state_changed_match is not None:
204
self.entry_group_state_changed_match.remove()
205
self.entry_group_state_changed_match = None
206
if self.group is not None:
207
self.group.Reset()
145
208
def add(self):
146
209
"""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()),
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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' ...",
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service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
170
171
210
self.remove()
211
if self.group is None:
212
self.group = dbus.Interface(
213
self.bus.get_object(avahi.DBUS_NAME,
214
self.server.EntryGroupNew()),
215
avahi.DBUS_INTERFACE_ENTRY_GROUP)
216
self.entry_group_state_changed_match = (
217
self.group.connect_to_signal(
218
'StateChanged', self.entry_group_state_changed))
219
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
220
self.name, self.type)
221
self.group.AddService(
222
self.interface,
223
self.protocol,
224
dbus.UInt32(0), # flags
225
self.name, self.type,
226
self.domain, self.host,
227
dbus.UInt16(self.port),
228
avahi.string_array_to_txt_array(self.TXT))
229
self.group.Commit()
230
def entry_group_state_changed(self, state, error):
231
"""Derived from the Avahi example code"""
232
logger.debug("Avahi entry group state change: %i", state)
233
234
if state == avahi.ENTRY_GROUP_ESTABLISHED:
235
logger.debug("Zeroconf service established.")
236
elif state == avahi.ENTRY_GROUP_COLLISION:
237
logger.info("Zeroconf service name collision.")
238
self.rename()
239
elif state == avahi.ENTRY_GROUP_FAILURE:
240
logger.critical("Avahi: Error in group state changed %s",
241
unicode(error))
242
raise AvahiGroupError("State changed: %s"
243
% unicode(error))
244
def cleanup(self):
245
"""Derived from the Avahi example code"""
246
if self.group is not None:
247
try:
248
self.group.Free()
249
except (dbus.exceptions.UnknownMethodException,
250
dbus.exceptions.DBusException):
251
pass
252
self.group = None
253
self.remove()
254
def server_state_changed(self, state, error=None):
255
"""Derived from the Avahi example code"""
256
logger.debug("Avahi server state change: %i", state)
257
bad_states = { avahi.SERVER_INVALID:
258
"Zeroconf server invalid",
259
avahi.SERVER_REGISTERING: None,
260
avahi.SERVER_COLLISION:
261
"Zeroconf server name collision",
262
avahi.SERVER_FAILURE:
263
"Zeroconf server failure" }
264
if state in bad_states:
265
if bad_states[state] is not None:
266
if error is None:
267
logger.error(bad_states[state])
268
else:
269
logger.error(bad_states[state] + ": %r", error)
270
self.cleanup()
271
elif state == avahi.SERVER_RUNNING:
272
self.add()
273
else:
274
if error is None:
275
logger.debug("Unknown state: %r", state)
276
else:
277
logger.debug("Unknown state: %r: %r", state, error)
278
def activate(self):
279
"""Derived from the Avahi example code"""
280
if self.server is None:
281
self.server = dbus.Interface(
282
self.bus.get_object(avahi.DBUS_NAME,
283
avahi.DBUS_PATH_SERVER,
284
follow_name_owner_changes=True),
285
avahi.DBUS_INTERFACE_SERVER)
286
self.server.connect_to_signal("StateChanged",
287
self.server_state_changed)
288
self.server_state_changed(self.server.GetState())
289
290
class AvahiServiceToSyslog(AvahiService):
291
def rename(self):
292
"""Add the new name to the syslog messages"""
293
ret = AvahiService.rename(self)
294
syslogger.setFormatter(logging.Formatter
295
('Mandos (%s) [%%(process)d]:'
296
' %%(levelname)s: %%(message)s'
297
% self.name))
298
return ret
299
300
def _timedelta_to_milliseconds(td):
301
"Convert a datetime.timedelta() to milliseconds"
302
return ((td.days * 24 * 60 * 60 * 1000)
303
+ (td.seconds * 1000)
304
+ (td.microseconds // 1000))
305
172
306
class Client(object):
173
307
"""A representation of a client host served by this server.
308
174
309
Attributes:
175
name: string; from the config file, used in log messages
310
_approved: bool(); 'None' if not yet approved/disapproved
311
approval_delay: datetime.timedelta(); Time to wait for approval
312
approval_duration: datetime.timedelta(); Duration of one approval
313
checker: subprocess.Popen(); a running checker process used
314
to see if the client lives.
315
'None' if no process is running.
316
checker_callback_tag: a gobject event source tag, or None
317
checker_command: string; External command which is run to check
318
if client lives. %() expansions are done at
319
runtime with vars(self) as dict, so that for
320
instance %(name)s can be used in the command.
321
checker_initiator_tag: a gobject event source tag, or None
322
created: datetime.datetime(); (UTC) object creation
323
client_structure: Object describing what attributes a client has
324
and is used for storing the client at exit
325
current_checker_command: string; current running checker_command
326
disable_initiator_tag: a gobject event source tag, or None
327
enabled: bool()
176
328
fingerprint: string (40 or 32 hexadecimal digits); used to
177
329
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: - '' -
330
host: string; available for use by the checker command
331
interval: datetime.timedelta(); How often to start a new checker
332
last_approval_request: datetime.datetime(); (UTC) or None
333
last_checked_ok: datetime.datetime(); (UTC) or None
334
last_checker_status: integer between 0 and 255 reflecting exit status
335
of last checker. -1 reflect crashed checker,
336
or None.
337
last_enabled: datetime.datetime(); (UTC)
338
name: string; from the config file, used in log messages and
339
D-Bus identifiers
340
secret: bytestring; sent verbatim (over TLS) to client
341
timeout: datetime.timedelta(); How long from last_checked_ok
342
until this client is disabled
343
extended_timeout: extra long timeout when password has been sent
344
runtime_expansions: Allowed attributes for runtime expansion.
345
expires: datetime.datetime(); time (UTC) when a client will be
346
disabled, or None
201
347
"""
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={}):
348
349
runtime_expansions = ("approval_delay", "approval_duration",
350
"created", "enabled", "fingerprint",
351
"host", "interval", "last_checked_ok",
352
"last_enabled", "name", "timeout")
353
354
def timeout_milliseconds(self):
355
"Return the 'timeout' attribute in milliseconds"
356
return _timedelta_to_milliseconds(self.timeout)
357
358
def extended_timeout_milliseconds(self):
359
"Return the 'extended_timeout' attribute in milliseconds"
360
return _timedelta_to_milliseconds(self.extended_timeout)
361
362
def interval_milliseconds(self):
363
"Return the 'interval' attribute in milliseconds"
364
return _timedelta_to_milliseconds(self.interval)
365
366
def approval_delay_milliseconds(self):
367
return _timedelta_to_milliseconds(self.approval_delay)
368
369
def __init__(self, name = None, config=None):
226
370
"""Note: the 'checker' key in 'config' sets the
227
371
'checker_command' attribute and *not* the 'checker'
228
372
attribute."""
229
373
self.name = name
230
logger.debug(u"Creating client %r", self.name)
374
if config is None:
375
config = {}
376
logger.debug("Creating client %r", self.name)
231
377
# Uppercase and remove spaces from fingerprint for later
232
378
# comparison purposes with return value from the fingerprint()
233
379
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
380
self.fingerprint = (config["fingerprint"].upper()
381
.replace(" ", ""))
382
logger.debug(" Fingerprint: %s", self.fingerprint)
237
383
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
384
self.secret = config["secret"].decode("base64")
239
385
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
386
with open(os.path.expanduser(os.path.expandvars
387
(config["secfile"])),
388
"rb") as secfile:
389
self.secret = secfile.read()
243
390
else:
244
raise TypeError(u"No secret or secfile for client %s"
391
raise TypeError("No secret or secfile for client %s"
245
392
% self.name)
246
393
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
394
self.created = datetime.datetime.utcnow()
395
self.enabled = True
396
self.last_approval_request = None
397
self.last_enabled = datetime.datetime.utcnow()
248
398
self.last_checked_ok = None
399
self.last_checker_status = None
249
400
self.timeout = string_to_delta(config["timeout"])
401
self.extended_timeout = string_to_delta(config
402
["extended_timeout"])
250
403
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
252
404
self.checker = None
253
405
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
406
self.disable_initiator_tag = None
407
self.expires = datetime.datetime.utcnow() + self.timeout
255
408
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
409
self.checker_command = config["checker"]
410
self.current_checker_command = None
411
self._approved = None
412
self.approved_by_default = config.get("approved_by_default",
413
True)
414
self.approvals_pending = 0
415
self.approval_delay = string_to_delta(
416
config["approval_delay"])
417
self.approval_duration = string_to_delta(
418
config["approval_duration"])
419
self.changedstate = (multiprocessing_manager
420
.Condition(multiprocessing_manager
421
.Lock()))
422
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
423
self.client_structure.append("client_structure")
424
425
for name, t in inspect.getmembers(type(self),
426
lambda obj: isinstance(obj, property)):
427
if not name.startswith("_"):
428
self.client_structure.append(name)
429
430
# Send notice to process children that client state has changed
431
def send_changedstate(self):
432
with self.changedstate:
433
self.changedstate.notify_all()
434
435
def enable(self):
258
436
"""Start this client's checker and timeout hooks"""
259
# Schedule a new checker to be started an 'interval' from now,
260
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
264
# Also start a new checker *right now*.
265
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:
437
if getattr(self, "enabled", False):
438
# Already enabled
439
return
440
self.send_changedstate()
441
self.expires = datetime.datetime.utcnow() + self.timeout
442
self.enabled = True
443
self.last_enabled = datetime.datetime.utcnow()
444
self.init_checker()
445
446
def disable(self, quiet=True):
447
"""Disable this client."""
448
if not getattr(self, "enabled", False):
279
449
return False
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
450
if not quiet:
451
self.send_changedstate()
452
if not quiet:
453
logger.info("Disabling client %s", self.name)
454
if getattr(self, "disable_initiator_tag", False):
455
gobject.source_remove(self.disable_initiator_tag)
456
self.disable_initiator_tag = None
457
self.expires = None
283
458
if getattr(self, "checker_initiator_tag", False):
284
459
gobject.source_remove(self.checker_initiator_tag)
285
460
self.checker_initiator_tag = None
286
461
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
462
self.enabled = False
289
463
# Do not run this again if called by a gobject.timeout_add
290
464
return False
465
291
466
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
467
self.disable()
468
469
def init_checker(self):
470
# Schedule a new checker to be started an 'interval' from now,
471
# and every interval from then on.
472
self.checker_initiator_tag = (gobject.timeout_add
473
(self.interval_milliseconds(),
474
self.start_checker))
475
# Schedule a disable() when 'timeout' has passed
476
self.disable_initiator_tag = (gobject.timeout_add
477
(self.timeout_milliseconds(),
478
self.disable))
479
# Also start a new checker *right now*.
480
self.start_checker()
481
482
def checker_callback(self, pid, condition, command):
295
483
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
484
self.checker_callback_tag = None
298
485
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?",
486
if os.WIFEXITED(condition):
487
self.last_checker_status = os.WEXITSTATUS(condition)
488
if self.last_checker_status == 0:
489
logger.info("Checker for %(name)s succeeded",
490
vars(self))
491
self.checked_ok()
492
else:
493
logger.info("Checker for %(name)s failed",
494
vars(self))
495
else:
496
self.last_checker_status = -1
497
logger.warning("Checker for %(name)s crashed?",
310
498
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
499
500
def checked_ok(self, timeout=None):
501
"""Bump up the timeout for this client.
502
503
This should only be called when the client has been seen,
504
alive and well.
505
"""
506
if timeout is None:
507
timeout = self.timeout
508
self.last_checked_ok = datetime.datetime.utcnow()
509
if self.disable_initiator_tag is not None:
510
gobject.source_remove(self.disable_initiator_tag)
511
if getattr(self, "enabled", False):
512
self.disable_initiator_tag = (gobject.timeout_add
513
(_timedelta_to_milliseconds
514
(timeout), self.disable))
515
self.expires = datetime.datetime.utcnow() + timeout
516
517
def need_approval(self):
518
self.last_approval_request = datetime.datetime.utcnow()
519
314
520
def start_checker(self):
315
521
"""Start a new checker subprocess if one is not running.
522
316
523
If a checker already exists, leave it running and do
317
524
nothing."""
318
525
# The reason for not killing a running checker is that if we
321
528
# client would inevitably timeout, since no checker would get
322
529
# a chance to run to completion. If we instead leave running
323
530
# 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.
531
# than 'timeout' for the client to be disabled, which is as it
532
# should be.
533
534
# If a checker exists, make sure it is not a zombie
535
try:
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
except (AttributeError, OSError) as error:
538
if (isinstance(error, OSError)
539
and error.errno != errno.ECHILD):
540
raise error
541
else:
542
if pid:
543
logger.warning("Checker was a zombie")
544
gobject.source_remove(self.checker_callback_tag)
545
self.checker_callback(pid, status,
546
self.current_checker_command)
547
# Start a new checker if needed
326
548
if self.checker is None:
327
549
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
550
# In case checker_command has exactly one % operator
551
command = self.checker_command % self.host
330
552
except TypeError:
331
553
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
333
for key, val in
334
vars(self).iteritems())
554
escaped_attrs = dict(
555
(attr,
556
re.escape(unicode(str(getattr(self, attr, "")),
557
errors=
558
'replace')))
559
for attr in
560
self.runtime_expansions)
561
335
562
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)
563
command = self.checker_command % escaped_attrs
564
except TypeError as error:
565
logger.error('Could not format string "%s":'
566
' %s', self.checker_command, error)
340
567
return True # Try again later
568
self.current_checker_command = command
341
569
try:
342
logger.info(u"Starting checker %r for %s",
570
logger.info("Starting checker %r for %s",
343
571
command, self.name)
344
572
# We don't need to redirect stdout and stderr, since
345
573
# in normal mode, that is already done by daemon(),
348
576
self.checker = subprocess.Popen(command,
349
577
close_fds=True,
350
578
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",
579
self.checker_callback_tag = (gobject.child_watch_add
580
(self.checker.pid,
581
self.checker_callback,
582
data=command))
583
# The checker may have completed before the gobject
584
# watch was added. Check for this.
585
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
586
if pid:
587
gobject.source_remove(self.checker_callback_tag)
588
self.checker_callback(pid, status, command)
589
except OSError as error:
590
logger.error("Failed to start subprocess: %s",
356
591
error)
357
592
# Re-run this periodically if run by gobject.timeout_add
358
593
return True
594
359
595
def stop_checker(self):
360
596
"""Force the checker process, if any, to stop."""
361
597
if self.checker_callback_tag:
363
599
self.checker_callback_tag = None
364
600
if getattr(self, "checker", None) is None:
365
601
return
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
602
logger.debug("Stopping checker for %(name)s", vars(self))
367
603
try:
368
604
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
605
#time.sleep(0.5)
370
606
#if self.checker.poll() is None:
371
607
# os.kill(self.checker.pid, signal.SIGKILL)
372
except OSError, error:
608
except OSError as error:
373
609
if error.errno != errno.ESRCH: # No such process
374
610
raise
375
611
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.
612
613
# Encrypts a client secret and stores it in a varible encrypted_secret
614
def encrypt_secret(self, key):
615
# Encryption-key need to be of a specific size, so we hash inputed key
616
hasheng = hashlib.sha256()
617
hasheng.update(key)
618
encryptionkey = hasheng.digest()
619
620
# Create validation hash so we know at decryption if it was sucessful
621
hasheng = hashlib.sha256()
622
hasheng.update(self.secret)
623
validationhash = hasheng.digest()
624
625
# Encrypt secret
626
iv = os.urandom(Crypto.Cipher.AES.block_size)
627
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
628
Crypto.Cipher.AES.MODE_CFB, iv)
629
ciphertext = ciphereng.encrypt(validationhash+self.secret)
630
self.encrypted_secret = (ciphertext, iv)
631
632
# Decrypt a encrypted client secret
633
def decrypt_secret(self, key):
634
# Decryption-key need to be of a specific size, so we hash inputed key
635
hasheng = hashlib.sha256()
636
hasheng.update(key)
637
encryptionkey = hasheng.digest()
638
639
# Decrypt encrypted secret
640
ciphertext, iv = self.encrypted_secret
641
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
642
Crypto.Cipher.AES.MODE_CFB, iv)
643
plain = ciphereng.decrypt(ciphertext)
644
645
# Validate decrypted secret to know if it was succesful
646
hasheng = hashlib.sha256()
647
validationhash = plain[:hasheng.digest_size]
648
secret = plain[hasheng.digest_size:]
649
hasheng.update(secret)
650
651
# if validation fails, we use key as new secret. Otherwhise, we use
652
# the decrypted secret
653
if hasheng.digest() == validationhash:
654
self.secret = secret
655
else:
656
self.secret = key
657
del self.encrypted_secret
658
659
660
def dbus_service_property(dbus_interface, signature="v",
661
access="readwrite", byte_arrays=False):
662
"""Decorators for marking methods of a DBusObjectWithProperties to
663
become properties on the D-Bus.
664
665
The decorated method will be called with no arguments by "Get"
666
and with one argument by "Set".
667
668
The parameters, where they are supported, are the same as
669
dbus.service.method, except there is only "signature", since the
670
type from Get() and the type sent to Set() is the same.
671
"""
672
# Encoding deeply encoded byte arrays is not supported yet by the
673
# "Set" method, so we fail early here:
674
if byte_arrays and signature != "ay":
675
raise ValueError("Byte arrays not supported for non-'ay'"
676
" signature %r" % signature)
677
def decorator(func):
678
func._dbus_is_property = True
679
func._dbus_interface = dbus_interface
680
func._dbus_signature = signature
681
func._dbus_access = access
682
func._dbus_name = func.__name__
683
if func._dbus_name.endswith("_dbus_property"):
684
func._dbus_name = func._dbus_name[:-14]
685
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
686
return func
687
return decorator
688
689
690
class DBusPropertyException(dbus.exceptions.DBusException):
691
"""A base class for D-Bus property-related exceptions
692
"""
693
def __unicode__(self):
694
return unicode(str(self))
695
696
697
class DBusPropertyAccessException(DBusPropertyException):
698
"""A property's access permissions disallows an operation.
699
"""
700
pass
701
702
703
class DBusPropertyNotFound(DBusPropertyException):
704
"""An attempt was made to access a non-existing property.
705
"""
706
pass
707
708
709
class DBusObjectWithProperties(dbus.service.Object):
710
"""A D-Bus object with properties.
711
712
Classes inheriting from this can use the dbus_service_property
713
decorator to expose methods as D-Bus properties. It exposes the
714
standard Get(), Set(), and GetAll() methods on the D-Bus.
715
"""
716
717
@staticmethod
718
def _is_dbus_property(obj):
719
return getattr(obj, "_dbus_is_property", False)
720
721
def _get_all_dbus_properties(self):
722
"""Returns a generator of (name, attribute) pairs
723
"""
724
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
725
for cls in self.__class__.__mro__
726
for name, prop in
727
inspect.getmembers(cls, self._is_dbus_property))
728
729
def _get_dbus_property(self, interface_name, property_name):
730
"""Returns a bound method if one exists which is a D-Bus
731
property with the specified name and interface.
732
"""
733
for cls in self.__class__.__mro__:
734
for name, value in (inspect.getmembers
735
(cls, self._is_dbus_property)):
736
if (value._dbus_name == property_name
737
and value._dbus_interface == interface_name):
738
return value.__get__(self)
739
740
# No such property
741
raise DBusPropertyNotFound(self.dbus_object_path + ":"
742
+ interface_name + "."
743
+ property_name)
744
745
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
746
out_signature="v")
747
def Get(self, interface_name, property_name):
748
"""Standard D-Bus property Get() method, see D-Bus standard.
749
"""
750
prop = self._get_dbus_property(interface_name, property_name)
751
if prop._dbus_access == "write":
752
raise DBusPropertyAccessException(property_name)
753
value = prop()
754
if not hasattr(value, "variant_level"):
755
return value
756
return type(value)(value, variant_level=value.variant_level+1)
757
758
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
759
def Set(self, interface_name, property_name, value):
760
"""Standard D-Bus property Set() method, see D-Bus standard.
761
"""
762
prop = self._get_dbus_property(interface_name, property_name)
763
if prop._dbus_access == "read":
764
raise DBusPropertyAccessException(property_name)
765
if prop._dbus_get_args_options["byte_arrays"]:
766
# The byte_arrays option is not supported yet on
767
# signatures other than "ay".
768
if prop._dbus_signature != "ay":
769
raise ValueError
770
value = dbus.ByteArray(''.join(unichr(byte)
771
for byte in value))
772
prop(value)
773
774
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
775
out_signature="a{sv}")
776
def GetAll(self, interface_name):
777
"""Standard D-Bus property GetAll() method, see D-Bus
778
standard.
779
780
Note: Will not include properties with access="write".
781
"""
782
properties = {}
783
for name, prop in self._get_all_dbus_properties():
784
if (interface_name
785
and interface_name != prop._dbus_interface):
786
# Interface non-empty but did not match
787
continue
788
# Ignore write-only properties
789
if prop._dbus_access == "write":
790
continue
791
value = prop()
792
if not hasattr(value, "variant_level"):
793
properties[name] = value
794
continue
795
properties[name] = type(value)(value, variant_level=
796
value.variant_level+1)
797
return dbus.Dictionary(properties, signature="sv")
798
799
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
800
out_signature="s",
801
path_keyword='object_path',
802
connection_keyword='connection')
803
def Introspect(self, object_path, connection):
804
"""Standard D-Bus method, overloaded to insert property tags.
805
"""
806
xmlstring = dbus.service.Object.Introspect(self, object_path,
807
connection)
808
try:
809
document = xml.dom.minidom.parseString(xmlstring)
810
def make_tag(document, name, prop):
811
e = document.createElement("property")
812
e.setAttribute("name", name)
813
e.setAttribute("type", prop._dbus_signature)
814
e.setAttribute("access", prop._dbus_access)
815
return e
816
for if_tag in document.getElementsByTagName("interface"):
817
for tag in (make_tag(document, name, prop)
818
for name, prop
819
in self._get_all_dbus_properties()
820
if prop._dbus_interface
821
== if_tag.getAttribute("name")):
822
if_tag.appendChild(tag)
823
# Add the names to the return values for the
824
# "org.freedesktop.DBus.Properties" methods
825
if (if_tag.getAttribute("name")
826
== "org.freedesktop.DBus.Properties"):
827
for cn in if_tag.getElementsByTagName("method"):
828
if cn.getAttribute("name") == "Get":
829
for arg in cn.getElementsByTagName("arg"):
830
if (arg.getAttribute("direction")
831
== "out"):
832
arg.setAttribute("name", "value")
833
elif cn.getAttribute("name") == "GetAll":
834
for arg in cn.getElementsByTagName("arg"):
835
if (arg.getAttribute("direction")
836
== "out"):
837
arg.setAttribute("name", "props")
838
xmlstring = document.toxml("utf-8")
839
document.unlink()
840
except (AttributeError, xml.dom.DOMException,
841
xml.parsers.expat.ExpatError) as error:
842
logger.error("Failed to override Introspection method",
843
error)
844
return xmlstring
845
846
847
def datetime_to_dbus (dt, variant_level=0):
848
"""Convert a UTC datetime.datetime() to a D-Bus type."""
849
if dt is None:
850
return dbus.String("", variant_level = variant_level)
851
return dbus.String(dt.isoformat(),
852
variant_level=variant_level)
853
854
855
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
856
.__metaclass__):
857
"""Applied to an empty subclass of a D-Bus object, this metaclass
858
will add additional D-Bus attributes matching a certain pattern.
859
"""
860
def __new__(mcs, name, bases, attr):
861
# Go through all the base classes which could have D-Bus
862
# methods, signals, or properties in them
863
for base in (b for b in bases
864
if issubclass(b, dbus.service.Object)):
865
# Go though all attributes of the base class
866
for attrname, attribute in inspect.getmembers(base):
867
# Ignore non-D-Bus attributes, and D-Bus attributes
868
# with the wrong interface name
869
if (not hasattr(attribute, "_dbus_interface")
870
or not attribute._dbus_interface
871
.startswith("se.recompile.Mandos")):
872
continue
873
# Create an alternate D-Bus interface name based on
874
# the current name
875
alt_interface = (attribute._dbus_interface
876
.replace("se.recompile.Mandos",
877
"se.bsnet.fukt.Mandos"))
878
# Is this a D-Bus signal?
879
if getattr(attribute, "_dbus_is_signal", False):
880
# Extract the original non-method function by
881
# black magic
882
nonmethod_func = (dict(
883
zip(attribute.func_code.co_freevars,
884
attribute.__closure__))["func"]
885
.cell_contents)
886
# Create a new, but exactly alike, function
887
# object, and decorate it to be a new D-Bus signal
888
# with the alternate D-Bus interface name
889
new_function = (dbus.service.signal
890
(alt_interface,
891
attribute._dbus_signature)
892
(types.FunctionType(
893
nonmethod_func.func_code,
894
nonmethod_func.func_globals,
895
nonmethod_func.func_name,
896
nonmethod_func.func_defaults,
897
nonmethod_func.func_closure)))
898
# Define a creator of a function to call both the
899
# old and new functions, so both the old and new
900
# signals gets sent when the function is called
901
def fixscope(func1, func2):
902
"""This function is a scope container to pass
903
func1 and func2 to the "call_both" function
904
outside of its arguments"""
905
def call_both(*args, **kwargs):
906
"""This function will emit two D-Bus
907
signals by calling func1 and func2"""
908
func1(*args, **kwargs)
909
func2(*args, **kwargs)
910
return call_both
911
# Create the "call_both" function and add it to
912
# the class
913
attr[attrname] = fixscope(attribute,
914
new_function)
915
# Is this a D-Bus method?
916
elif getattr(attribute, "_dbus_is_method", False):
917
# Create a new, but exactly alike, function
918
# object. Decorate it to be a new D-Bus method
919
# with the alternate D-Bus interface name. Add it
920
# to the class.
921
attr[attrname] = (dbus.service.method
922
(alt_interface,
923
attribute._dbus_in_signature,
924
attribute._dbus_out_signature)
925
(types.FunctionType
926
(attribute.func_code,
927
attribute.func_globals,
928
attribute.func_name,
929
attribute.func_defaults,
930
attribute.func_closure)))
931
# Is this a D-Bus property?
932
elif getattr(attribute, "_dbus_is_property", False):
933
# Create a new, but exactly alike, function
934
# object, and decorate it to be a new D-Bus
935
# property with the alternate D-Bus interface
936
# name. Add it to the class.
937
attr[attrname] = (dbus_service_property
938
(alt_interface,
939
attribute._dbus_signature,
940
attribute._dbus_access,
941
attribute
942
._dbus_get_args_options
943
["byte_arrays"])
944
(types.FunctionType
945
(attribute.func_code,
946
attribute.func_globals,
947
attribute.func_name,
948
attribute.func_defaults,
949
attribute.func_closure)))
950
return type.__new__(mcs, name, bases, attr)
951
952
953
class ClientDBus(Client, DBusObjectWithProperties):
954
"""A Client class using D-Bus
955
956
Attributes:
957
dbus_object_path: dbus.ObjectPath
958
bus: dbus.SystemBus()
959
"""
960
961
runtime_expansions = (Client.runtime_expansions
962
+ ("dbus_object_path",))
963
964
# dbus.service.Object doesn't use super(), so we can't either.
965
966
def __init__(self, bus = None, *args, **kwargs):
967
self.bus = bus
968
Client.__init__(self, *args, **kwargs)
969
970
self._approvals_pending = 0
971
# Only now, when this client is initialized, can it show up on
972
# the D-Bus
973
client_object_name = unicode(self.name).translate(
974
{ord("."): ord("_"),
975
ord("-"): ord("_")})
976
self.dbus_object_path = (dbus.ObjectPath
977
("/clients/" + client_object_name))
978
DBusObjectWithProperties.__init__(self, self.bus,
979
self.dbus_object_path)
980
981
def notifychangeproperty(transform_func,
982
dbus_name, type_func=lambda x: x,
983
variant_level=1):
984
""" Modify a variable so that it's a property which announces
985
its changes to DBus.
986
987
transform_fun: Function that takes a value and a variant_level
988
and transforms it to a D-Bus type.
989
dbus_name: D-Bus name of the variable
990
type_func: Function that transform the value before sending it
991
to the D-Bus. Default: no transform
992
variant_level: D-Bus variant level. Default: 1
993
"""
994
attrname = "_{0}".format(dbus_name)
995
def setter(self, value):
996
if hasattr(self, "dbus_object_path"):
997
if (not hasattr(self, attrname) or
998
type_func(getattr(self, attrname, None))
999
!= type_func(value)):
1000
dbus_value = transform_func(type_func(value),
1001
variant_level
1002
=variant_level)
1003
self.PropertyChanged(dbus.String(dbus_name),
1004
dbus_value)
1005
setattr(self, attrname, value)
1006
1007
return property(lambda self: getattr(self, attrname), setter)
1008
1009
1010
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1011
approvals_pending = notifychangeproperty(dbus.Boolean,
1012
"ApprovalPending",
1013
type_func = bool)
1014
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1015
last_enabled = notifychangeproperty(datetime_to_dbus,
1016
"LastEnabled")
1017
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1018
type_func = lambda checker:
1019
checker is not None)
1020
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1021
"LastCheckedOK")
1022
last_approval_request = notifychangeproperty(
1023
datetime_to_dbus, "LastApprovalRequest")
1024
approved_by_default = notifychangeproperty(dbus.Boolean,
1025
"ApprovedByDefault")
1026
approval_delay = notifychangeproperty(dbus.UInt16,
1027
"ApprovalDelay",
1028
type_func =
1029
_timedelta_to_milliseconds)
1030
approval_duration = notifychangeproperty(
1031
dbus.UInt16, "ApprovalDuration",
1032
type_func = _timedelta_to_milliseconds)
1033
host = notifychangeproperty(dbus.String, "Host")
1034
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1035
type_func =
1036
_timedelta_to_milliseconds)
1037
extended_timeout = notifychangeproperty(
1038
dbus.UInt16, "ExtendedTimeout",
1039
type_func = _timedelta_to_milliseconds)
1040
interval = notifychangeproperty(dbus.UInt16,
1041
"Interval",
1042
type_func =
1043
_timedelta_to_milliseconds)
1044
checker_command = notifychangeproperty(dbus.String, "Checker")
1045
1046
del notifychangeproperty
1047
1048
def __del__(self, *args, **kwargs):
1049
try:
1050
self.remove_from_connection()
1051
except LookupError:
1052
pass
1053
if hasattr(DBusObjectWithProperties, "__del__"):
1054
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1055
Client.__del__(self, *args, **kwargs)
1056
1057
def checker_callback(self, pid, condition, command,
1058
*args, **kwargs):
1059
self.checker_callback_tag = None
1060
self.checker = None
1061
if os.WIFEXITED(condition):
1062
exitstatus = os.WEXITSTATUS(condition)
1063
# Emit D-Bus signal
1064
self.CheckerCompleted(dbus.Int16(exitstatus),
1065
dbus.Int64(condition),
1066
dbus.String(command))
1067
else:
1068
# Emit D-Bus signal
1069
self.CheckerCompleted(dbus.Int16(-1),
1070
dbus.Int64(condition),
1071
dbus.String(command))
1072
1073
return Client.checker_callback(self, pid, condition, command,
1074
*args, **kwargs)
1075
1076
def start_checker(self, *args, **kwargs):
1077
old_checker = self.checker
1078
if self.checker is not None:
1079
old_checker_pid = self.checker.pid
1080
else:
1081
old_checker_pid = None
1082
r = Client.start_checker(self, *args, **kwargs)
1083
# Only if new checker process was started
1084
if (self.checker is not None
1085
and old_checker_pid != self.checker.pid):
1086
# Emit D-Bus signal
1087
self.CheckerStarted(self.current_checker_command)
1088
return r
1089
1090
def _reset_approved(self):
1091
self._approved = None
1092
return False
1093
1094
def approve(self, value=True):
1095
self.send_changedstate()
1096
self._approved = value
1097
gobject.timeout_add(_timedelta_to_milliseconds
1098
(self.approval_duration),
1099
self._reset_approved)
1100
1101
1102
## D-Bus methods, signals & properties
1103
_interface = "se.recompile.Mandos.Client"
1104
1105
## Signals
1106
1107
# CheckerCompleted - signal
1108
@dbus.service.signal(_interface, signature="nxs")
1109
def CheckerCompleted(self, exitcode, waitstatus, command):
1110
"D-Bus signal"
1111
pass
1112
1113
# CheckerStarted - signal
1114
@dbus.service.signal(_interface, signature="s")
1115
def CheckerStarted(self, command):
1116
"D-Bus signal"
1117
pass
1118
1119
# PropertyChanged - signal
1120
@dbus.service.signal(_interface, signature="sv")
1121
def PropertyChanged(self, property, value):
1122
"D-Bus signal"
1123
pass
1124
1125
# GotSecret - signal
1126
@dbus.service.signal(_interface)
1127
def GotSecret(self):
1128
"""D-Bus signal
1129
Is sent after a successful transfer of secret from the Mandos
1130
server to mandos-client
1131
"""
1132
pass
1133
1134
# Rejected - signal
1135
@dbus.service.signal(_interface, signature="s")
1136
def Rejected(self, reason):
1137
"D-Bus signal"
1138
pass
1139
1140
# NeedApproval - signal
1141
@dbus.service.signal(_interface, signature="tb")
1142
def NeedApproval(self, timeout, default):
1143
"D-Bus signal"
1144
return self.need_approval()
1145
1146
# NeRwequest - signal
1147
@dbus.service.signal(_interface, signature="s")
1148
def NewRequest(self, ip):
1149
"""D-Bus signal
1150
Is sent after a client request a password.
1151
"""
1152
pass
1153
1154
## Methods
1155
1156
# Approve - method
1157
@dbus.service.method(_interface, in_signature="b")
1158
def Approve(self, value):
1159
self.approve(value)
1160
1161
# CheckedOK - method
1162
@dbus.service.method(_interface)
1163
def CheckedOK(self):
1164
self.checked_ok()
1165
1166
# Enable - method
1167
@dbus.service.method(_interface)
1168
def Enable(self):
1169
"D-Bus method"
1170
self.enable()
1171
1172
# StartChecker - method
1173
@dbus.service.method(_interface)
1174
def StartChecker(self):
1175
"D-Bus method"
1176
self.start_checker()
1177
1178
# Disable - method
1179
@dbus.service.method(_interface)
1180
def Disable(self):
1181
"D-Bus method"
1182
self.disable()
1183
1184
# StopChecker - method
1185
@dbus.service.method(_interface)
1186
def StopChecker(self):
1187
self.stop_checker()
1188
1189
## Properties
1190
1191
# ApprovalPending - property
1192
@dbus_service_property(_interface, signature="b", access="read")
1193
def ApprovalPending_dbus_property(self):
1194
return dbus.Boolean(bool(self.approvals_pending))
1195
1196
# ApprovedByDefault - property
1197
@dbus_service_property(_interface, signature="b",
1198
access="readwrite")
1199
def ApprovedByDefault_dbus_property(self, value=None):
1200
if value is None: # get
1201
return dbus.Boolean(self.approved_by_default)
1202
self.approved_by_default = bool(value)
1203
1204
# ApprovalDelay - property
1205
@dbus_service_property(_interface, signature="t",
1206
access="readwrite")
1207
def ApprovalDelay_dbus_property(self, value=None):
1208
if value is None: # get
1209
return dbus.UInt64(self.approval_delay_milliseconds())
1210
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1211
1212
# ApprovalDuration - property
1213
@dbus_service_property(_interface, signature="t",
1214
access="readwrite")
1215
def ApprovalDuration_dbus_property(self, value=None):
1216
if value is None: # get
1217
return dbus.UInt64(_timedelta_to_milliseconds(
1218
self.approval_duration))
1219
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1220
1221
# Name - property
1222
@dbus_service_property(_interface, signature="s", access="read")
1223
def Name_dbus_property(self):
1224
return dbus.String(self.name)
1225
1226
# Fingerprint - property
1227
@dbus_service_property(_interface, signature="s", access="read")
1228
def Fingerprint_dbus_property(self):
1229
return dbus.String(self.fingerprint)
1230
1231
# Host - property
1232
@dbus_service_property(_interface, signature="s",
1233
access="readwrite")
1234
def Host_dbus_property(self, value=None):
1235
if value is None: # get
1236
return dbus.String(self.host)
1237
self.host = value
1238
1239
# Created - property
1240
@dbus_service_property(_interface, signature="s", access="read")
1241
def Created_dbus_property(self):
1242
return dbus.String(datetime_to_dbus(self.created))
1243
1244
# LastEnabled - property
1245
@dbus_service_property(_interface, signature="s", access="read")
1246
def LastEnabled_dbus_property(self):
1247
return datetime_to_dbus(self.last_enabled)
1248
1249
# Enabled - property
1250
@dbus_service_property(_interface, signature="b",
1251
access="readwrite")
1252
def Enabled_dbus_property(self, value=None):
1253
if value is None: # get
1254
return dbus.Boolean(self.enabled)
1255
if value:
1256
self.enable()
1257
else:
1258
self.disable()
1259
1260
# LastCheckedOK - property
1261
@dbus_service_property(_interface, signature="s",
1262
access="readwrite")
1263
def LastCheckedOK_dbus_property(self, value=None):
1264
if value is not None:
1265
self.checked_ok()
1266
return
1267
return datetime_to_dbus(self.last_checked_ok)
1268
1269
# Expires - property
1270
@dbus_service_property(_interface, signature="s", access="read")
1271
def Expires_dbus_property(self):
1272
return datetime_to_dbus(self.expires)
1273
1274
# LastApprovalRequest - property
1275
@dbus_service_property(_interface, signature="s", access="read")
1276
def LastApprovalRequest_dbus_property(self):
1277
return datetime_to_dbus(self.last_approval_request)
1278
1279
# Timeout - property
1280
@dbus_service_property(_interface, signature="t",
1281
access="readwrite")
1282
def Timeout_dbus_property(self, value=None):
1283
if value is None: # get
1284
return dbus.UInt64(self.timeout_milliseconds())
1285
self.timeout = datetime.timedelta(0, 0, 0, value)
1286
if getattr(self, "disable_initiator_tag", None) is None:
1287
return
1288
# Reschedule timeout
1289
gobject.source_remove(self.disable_initiator_tag)
1290
self.disable_initiator_tag = None
1291
self.expires = None
1292
time_to_die = _timedelta_to_milliseconds((self
1293
.last_checked_ok
1294
+ self.timeout)
1295
- datetime.datetime
1296
.utcnow())
1297
if time_to_die <= 0:
1298
# The timeout has passed
1299
self.disable()
1300
else:
1301
self.expires = (datetime.datetime.utcnow()
1302
+ datetime.timedelta(milliseconds =
1303
time_to_die))
1304
self.disable_initiator_tag = (gobject.timeout_add
1305
(time_to_die, self.disable))
1306
1307
# ExtendedTimeout - property
1308
@dbus_service_property(_interface, signature="t",
1309
access="readwrite")
1310
def ExtendedTimeout_dbus_property(self, value=None):
1311
if value is None: # get
1312
return dbus.UInt64(self.extended_timeout_milliseconds())
1313
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1314
1315
# Interval - property
1316
@dbus_service_property(_interface, signature="t",
1317
access="readwrite")
1318
def Interval_dbus_property(self, value=None):
1319
if value is None: # get
1320
return dbus.UInt64(self.interval_milliseconds())
1321
self.interval = datetime.timedelta(0, 0, 0, value)
1322
if getattr(self, "checker_initiator_tag", None) is None:
1323
return
1324
# Reschedule checker run
1325
gobject.source_remove(self.checker_initiator_tag)
1326
self.checker_initiator_tag = (gobject.timeout_add
1327
(value, self.start_checker))
1328
self.start_checker() # Start one now, too
1329
1330
# Checker - property
1331
@dbus_service_property(_interface, signature="s",
1332
access="readwrite")
1333
def Checker_dbus_property(self, value=None):
1334
if value is None: # get
1335
return dbus.String(self.checker_command)
1336
self.checker_command = value
1337
1338
# CheckerRunning - property
1339
@dbus_service_property(_interface, signature="b",
1340
access="readwrite")
1341
def CheckerRunning_dbus_property(self, value=None):
1342
if value is None: # get
1343
return dbus.Boolean(self.checker is not None)
1344
if value:
1345
self.start_checker()
1346
else:
1347
self.stop_checker()
1348
1349
# ObjectPath - property
1350
@dbus_service_property(_interface, signature="o", access="read")
1351
def ObjectPath_dbus_property(self):
1352
return self.dbus_object_path # is already a dbus.ObjectPath
1353
1354
# Secret = property
1355
@dbus_service_property(_interface, signature="ay",
1356
access="write", byte_arrays=True)
1357
def Secret_dbus_property(self, value):
1358
self.secret = str(value)
1359
1360
del _interface
1361
1362
1363
class ProxyClient(object):
1364
def __init__(self, child_pipe, fpr, address):
1365
self._pipe = child_pipe
1366
self._pipe.send(('init', fpr, address))
1367
if not self._pipe.recv():
1368
raise KeyError()
1369
1370
def __getattribute__(self, name):
1371
if(name == '_pipe'):
1372
return super(ProxyClient, self).__getattribute__(name)
1373
self._pipe.send(('getattr', name))
1374
data = self._pipe.recv()
1375
if data[0] == 'data':
1376
return data[1]
1377
if data[0] == 'function':
1378
def func(*args, **kwargs):
1379
self._pipe.send(('funcall', name, args, kwargs))
1380
return self._pipe.recv()[1]
1381
return func
1382
1383
def __setattr__(self, name, value):
1384
if(name == '_pipe'):
1385
return super(ProxyClient, self).__setattr__(name, value)
1386
self._pipe.send(('setattr', name, value))
1387
1388
1389
class ClientDBusTransitional(ClientDBus):
1390
__metaclass__ = AlternateDBusNamesMetaclass
1391
1392
1393
class ClientHandler(socketserver.BaseRequestHandler, object):
1394
"""A class to handle client connections.
1395
1396
Instantiated once for each connection to handle it.
442
1397
Note: This will run in its own forked process."""
443
1398
444
1399
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.
1400
with contextlib.closing(self.server.child_pipe) as child_pipe:
1401
logger.info("TCP connection from: %s",
1402
unicode(self.client_address))
1403
logger.debug("Pipe FD: %d",
1404
self.server.child_pipe.fileno())
1405
1406
session = (gnutls.connection
1407
.ClientSession(self.request,
1408
gnutls.connection
1409
.X509Credentials()))
1410
1411
# Note: gnutls.connection.X509Credentials is really a
1412
# generic GnuTLS certificate credentials object so long as
1413
# no X.509 keys are added to it. Therefore, we can use it
1414
# here despite using OpenPGP certificates.
1415
1416
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1417
# "+AES-256-CBC", "+SHA1",
1418
# "+COMP-NULL", "+CTYPE-OPENPGP",
1419
# "+DHE-DSS"))
1420
# Use a fallback default, since this MUST be set.
1421
priority = self.server.gnutls_priority
1422
if priority is None:
1423
priority = "NORMAL"
1424
(gnutls.library.functions
1425
.gnutls_priority_set_direct(session._c_object,
1426
priority, None))
1427
1428
# Start communication using the Mandos protocol
1429
# Get protocol number
1430
line = self.request.makefile().readline()
1431
logger.debug("Protocol version: %r", line)
1432
try:
1433
if int(line.strip().split()[0]) > 1:
1434
raise RuntimeError
1435
except (ValueError, IndexError, RuntimeError) as error:
1436
logger.error("Unknown protocol version: %s", error)
1437
return
1438
1439
# Start GnuTLS connection
1440
try:
1441
session.handshake()
1442
except gnutls.errors.GNUTLSError as error:
1443
logger.warning("Handshake failed: %s", error)
1444
# Do not run session.bye() here: the session is not
1445
# established. Just abandon the request.
1446
return
1447
logger.debug("Handshake succeeded")
1448
1449
approval_required = False
1450
try:
1451
try:
1452
fpr = self.fingerprint(self.peer_certificate
1453
(session))
1454
except (TypeError,
1455
gnutls.errors.GNUTLSError) as error:
1456
logger.warning("Bad certificate: %s", error)
1457
return
1458
logger.debug("Fingerprint: %s", fpr)
1459
if self.server.use_dbus:
1460
# Emit D-Bus signal
1461
client.NewRequest(str(self.client_address))
1462
1463
try:
1464
client = ProxyClient(child_pipe, fpr,
1465
self.client_address)
1466
except KeyError:
1467
return
1468
1469
if client.approval_delay:
1470
delay = client.approval_delay
1471
client.approvals_pending += 1
1472
approval_required = True
1473
1474
while True:
1475
if not client.enabled:
1476
logger.info("Client %s is disabled",
1477
client.name)
1478
if self.server.use_dbus:
1479
# Emit D-Bus signal
1480
client.Rejected("Disabled")
1481
return
1482
1483
if client._approved or not client.approval_delay:
1484
#We are approved or approval is disabled
1485
break
1486
elif client._approved is None:
1487
logger.info("Client %s needs approval",
1488
client.name)
1489
if self.server.use_dbus:
1490
# Emit D-Bus signal
1491
client.NeedApproval(
1492
client.approval_delay_milliseconds(),
1493
client.approved_by_default)
1494
else:
1495
logger.warning("Client %s was not approved",
1496
client.name)
1497
if self.server.use_dbus:
1498
# Emit D-Bus signal
1499
client.Rejected("Denied")
1500
return
1501
1502
#wait until timeout or approved
1503
time = datetime.datetime.now()
1504
client.changedstate.acquire()
1505
(client.changedstate.wait
1506
(float(client._timedelta_to_milliseconds(delay)
1507
/ 1000)))
1508
client.changedstate.release()
1509
time2 = datetime.datetime.now()
1510
if (time2 - time) >= delay:
1511
if not client.approved_by_default:
1512
logger.warning("Client %s timed out while"
1513
" waiting for approval",
1514
client.name)
1515
if self.server.use_dbus:
1516
# Emit D-Bus signal
1517
client.Rejected("Approval timed out")
1518
return
1519
else:
1520
break
1521
else:
1522
delay -= time2 - time
1523
1524
sent_size = 0
1525
while sent_size < len(client.secret):
1526
try:
1527
sent = session.send(client.secret[sent_size:])
1528
except gnutls.errors.GNUTLSError as error:
1529
logger.warning("gnutls send failed")
1530
return
1531
logger.debug("Sent: %d, remaining: %d",
1532
sent, len(client.secret)
1533
- (sent_size + sent))
1534
sent_size += sent
1535
1536
logger.info("Sending secret to %s", client.name)
1537
# bump the timeout using extended_timeout
1538
client.checked_ok(client.extended_timeout)
1539
if self.server.use_dbus:
1540
# Emit D-Bus signal
1541
client.GotSecret()
1542
1543
finally:
1544
if approval_required:
1545
client.approvals_pending -= 1
1546
try:
1547
session.bye()
1548
except gnutls.errors.GNUTLSError as error:
1549
logger.warning("GnuTLS bye failed")
1550
1551
@staticmethod
1552
def peer_certificate(session):
1553
"Return the peer's OpenPGP certificate as a bytestring"
1554
# If not an OpenPGP certificate...
1555
if (gnutls.library.functions
1556
.gnutls_certificate_type_get(session._c_object)
1557
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1558
# ...do the normal thing
1559
return session.peer_certificate
1560
list_size = ctypes.c_uint(1)
1561
cert_list = (gnutls.library.functions
1562
.gnutls_certificate_get_peers
1563
(session._c_object, ctypes.byref(list_size)))
1564
if not bool(cert_list) and list_size.value != 0:
1565
raise gnutls.errors.GNUTLSError("error getting peer"
1566
" certificate")
1567
if list_size.value == 0:
1568
return None
1569
cert = cert_list[0]
1570
return ctypes.string_at(cert.data, cert.size)
1571
1572
@staticmethod
1573
def fingerprint(openpgp):
1574
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1575
# New GnuTLS "datum" with the OpenPGP public key
1576
datum = (gnutls.library.types
1577
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1578
ctypes.POINTER
1579
(ctypes.c_ubyte)),
1580
ctypes.c_uint(len(openpgp))))
1581
# New empty GnuTLS certificate
1582
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1583
(gnutls.library.functions
1584
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1585
# Import the OpenPGP public key into the certificate
1586
(gnutls.library.functions
1587
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1588
gnutls.library.constants
1589
.GNUTLS_OPENPGP_FMT_RAW))
1590
# Verify the self signature in the key
1591
crtverify = ctypes.c_uint()
1592
(gnutls.library.functions
1593
.gnutls_openpgp_crt_verify_self(crt, 0,
1594
ctypes.byref(crtverify)))
1595
if crtverify.value != 0:
1596
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1597
raise (gnutls.errors.CertificateSecurityError
1598
("Verify failed"))
1599
# New buffer for the fingerprint
1600
buf = ctypes.create_string_buffer(20)
1601
buf_len = ctypes.c_size_t()
1602
# Get the fingerprint from the certificate into the buffer
1603
(gnutls.library.functions
1604
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1605
ctypes.byref(buf_len)))
1606
# Deinit the certificate
1607
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1608
# Convert the buffer to a Python bytestring
1609
fpr = ctypes.string_at(buf, buf_len.value)
1610
# Convert the bytestring to hexadecimal notation
1611
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1612
return hex_fpr
1613
1614
1615
class MultiprocessingMixIn(object):
1616
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1617
def sub_process_main(self, request, address):
1618
try:
1619
self.finish_request(request, address)
1620
except:
1621
self.handle_error(request, address)
1622
self.close_request(request)
1623
1624
def process_request(self, request, address):
1625
"""Start a new process to process the request."""
1626
proc = multiprocessing.Process(target = self.sub_process_main,
1627
args = (request,
1628
address))
1629
proc.start()
1630
return proc
1631
1632
1633
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1634
""" adds a pipe to the MixIn """
1635
def process_request(self, request, client_address):
1636
"""Overrides and wraps the original process_request().
1637
1638
This function creates a new pipe in self.pipe
1639
"""
1640
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1641
1642
proc = MultiprocessingMixIn.process_request(self, request,
1643
client_address)
1644
self.child_pipe.close()
1645
self.add_pipe(parent_pipe, proc)
1646
1647
def add_pipe(self, parent_pipe, proc):
1648
"""Dummy function; override as necessary"""
1649
raise NotImplementedError
1650
1651
1652
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1653
socketserver.TCPServer, object):
1654
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1655
518
1656
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1657
enabled: Boolean; whether this server is activated yet
1658
interface: None or a network interface name (string)
1659
use_ipv6: Boolean; to use IPv6 or not
522
1660
"""
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)
1661
def __init__(self, server_address, RequestHandlerClass,
1662
interface=None, use_ipv6=True):
1663
self.interface = interface
1664
if use_ipv6:
1665
self.address_family = socket.AF_INET6
1666
socketserver.TCPServer.__init__(self, server_address,
1667
RequestHandlerClass)
533
1668
def server_bind(self):
534
1669
"""This overrides the normal server_bind() function
535
1670
to bind to an interface if one was specified, and also NOT to
536
1671
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
1672
if self.interface is not None:
1673
if SO_BINDTODEVICE is None:
1674
logger.error("SO_BINDTODEVICE does not exist;"
1675
" cannot bind to interface %s",
1676
self.interface)
1677
else:
1678
try:
1679
self.socket.setsockopt(socket.SOL_SOCKET,
1680
SO_BINDTODEVICE,
1681
str(self.interface
1682
+ '\0'))
1683
except socket.error as error:
1684
if error[0] == errno.EPERM:
1685
logger.error("No permission to"
1686
" bind to interface %s",
1687
self.interface)
1688
elif error[0] == errno.ENOPROTOOPT:
1689
logger.error("SO_BINDTODEVICE not available;"
1690
" cannot bind to interface %s",
1691
self.interface)
1692
else:
1693
raise
551
1694
# Only bind(2) the socket if we really need to.
552
1695
if self.server_address[0] or self.server_address[1]:
553
1696
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1697
if self.address_family == socket.AF_INET6:
1698
any_address = "::" # in6addr_any
1699
else:
1700
any_address = socket.INADDR_ANY
1701
self.server_address = (any_address,
556
1702
self.server_address[1])
557
1703
elif not self.server_address[1]:
558
1704
self.server_address = (self.server_address[0],
559
1705
0)
560
# if self.settings["interface"]:
1706
# if self.interface:
561
1707
# self.server_address = (self.server_address[0],
562
1708
# 0, # port
563
1709
# 0, # flowinfo
564
1710
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1711
# (self.interface))
1712
return socketserver.TCPServer.server_bind(self)
1713
1714
1715
class MandosServer(IPv6_TCPServer):
1716
"""Mandos server.
1717
1718
Attributes:
1719
clients: set of Client objects
1720
gnutls_priority GnuTLS priority string
1721
use_dbus: Boolean; to emit D-Bus signals or not
1722
1723
Assumes a gobject.MainLoop event loop.
1724
"""
1725
def __init__(self, server_address, RequestHandlerClass,
1726
interface=None, use_ipv6=True, clients=None,
1727
gnutls_priority=None, use_dbus=True):
1728
self.enabled = False
1729
self.clients = clients
1730
if self.clients is None:
1731
self.clients = {}
1732
self.use_dbus = use_dbus
1733
self.gnutls_priority = gnutls_priority
1734
IPv6_TCPServer.__init__(self, server_address,
1735
RequestHandlerClass,
1736
interface = interface,
1737
use_ipv6 = use_ipv6)
568
1738
def server_activate(self):
569
1739
if self.enabled:
570
return super(type(self), self).server_activate()
1740
return socketserver.TCPServer.server_activate(self)
1741
571
1742
def enable(self):
572
1743
self.enabled = True
1744
1745
def add_pipe(self, parent_pipe, proc):
1746
# Call "handle_ipc" for both data and EOF events
1747
gobject.io_add_watch(parent_pipe.fileno(),
1748
gobject.IO_IN | gobject.IO_HUP,
1749
functools.partial(self.handle_ipc,
1750
parent_pipe =
1751
parent_pipe,
1752
proc = proc))
1753
1754
def handle_ipc(self, source, condition, parent_pipe=None,
1755
proc = None, client_object=None):
1756
condition_names = {
1757
gobject.IO_IN: "IN", # There is data to read.
1758
gobject.IO_OUT: "OUT", # Data can be written (without
1759
# blocking).
1760
gobject.IO_PRI: "PRI", # There is urgent data to read.
1761
gobject.IO_ERR: "ERR", # Error condition.
1762
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1763
# broken, usually for pipes and
1764
# sockets).
1765
}
1766
conditions_string = ' | '.join(name
1767
for cond, name in
1768
condition_names.iteritems()
1769
if cond & condition)
1770
# error, or the other end of multiprocessing.Pipe has closed
1771
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1772
# Wait for other process to exit
1773
proc.join()
1774
return False
1775
1776
# Read a request from the child
1777
request = parent_pipe.recv()
1778
command = request[0]
1779
1780
if command == 'init':
1781
fpr = request[1]
1782
address = request[2]
1783
1784
for c in self.clients.itervalues():
1785
if c.fingerprint == fpr:
1786
client = c
1787
break
1788
else:
1789
logger.info("Client not found for fingerprint: %s, ad"
1790
"dress: %s", fpr, address)
1791
if self.use_dbus:
1792
# Emit D-Bus signal
1793
mandos_dbus_service.ClientNotFound(fpr,
1794
address[0])
1795
parent_pipe.send(False)
1796
return False
1797
1798
gobject.io_add_watch(parent_pipe.fileno(),
1799
gobject.IO_IN | gobject.IO_HUP,
1800
functools.partial(self.handle_ipc,
1801
parent_pipe =
1802
parent_pipe,
1803
proc = proc,
1804
client_object =
1805
client))
1806
parent_pipe.send(True)
1807
# remove the old hook in favor of the new above hook on
1808
# same fileno
1809
return False
1810
if command == 'funcall':
1811
funcname = request[1]
1812
args = request[2]
1813
kwargs = request[3]
1814
1815
parent_pipe.send(('data', getattr(client_object,
1816
funcname)(*args,
1817
**kwargs)))
1818
1819
if command == 'getattr':
1820
attrname = request[1]
1821
if callable(client_object.__getattribute__(attrname)):
1822
parent_pipe.send(('function',))
1823
else:
1824
parent_pipe.send(('data', client_object
1825
.__getattribute__(attrname)))
1826
1827
if command == 'setattr':
1828
attrname = request[1]
1829
value = request[2]
1830
setattr(client_object, attrname, value)
1831
1832
return True
573
1833
574
1834
575
1835
def string_to_delta(interval):
576
1836
"""Parse a string and return a datetime.timedelta
577
1837
578
1838
>>> string_to_delta('7d')
579
1839
datetime.timedelta(7)
580
1840
>>> string_to_delta('60s')
583
1843
datetime.timedelta(0, 3600)
584
1844
>>> string_to_delta('24h')
585
1845
datetime.timedelta(1)
586
>>> string_to_delta(u'1w')
1846
>>> string_to_delta('1w')
587
1847
datetime.timedelta(7)
588
1848
>>> string_to_delta('5m 30s')
589
1849
datetime.timedelta(0, 330)
591
1851
timevalue = datetime.timedelta(0)
592
1852
for s in interval.split():
593
1853
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
1854
suffix = unicode(s[-1])
1855
value = int(s[:-1])
1856
if suffix == "d":
597
1857
delta = datetime.timedelta(value)
598
elif suffix == u"s":
1858
elif suffix == "s":
599
1859
delta = datetime.timedelta(0, value)
600
elif suffix == u"m":
1860
elif suffix == "m":
601
1861
delta = datetime.timedelta(0, 0, 0, 0, value)
602
elif suffix == u"h":
1862
elif suffix == "h":
603
1863
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
604
elif suffix == u"w":
1864
elif suffix == "w":
605
1865
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
1866
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
1867
raise ValueError("Unknown suffix %r" % suffix)
1868
except (ValueError, IndexError) as e:
1869
raise ValueError(*(e.args))
610
1870
timevalue += delta
611
1871
return timevalue
612
1872
613
1873
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
1874
def daemon(nochdir = False, noclose = False):
663
1875
"""See daemon(3). Standard BSD Unix function.
1876
664
1877
This should really exist as os.daemon, but it doesn't (yet)."""
665
1878
if os.fork():
666
1879
sys.exit()
674
1887
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
675
1888
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
1889
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
1890
"%s not a character device"
1891
% os.path.devnull)
678
1892
os.dup2(null, sys.stdin.fileno())
679
1893
os.dup2(null, sys.stdout.fileno())
680
1894
os.dup2(null, sys.stderr.fileno())
683
1897
684
1898
685
1899
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()
1900
1901
##################################################################
1902
# Parsing of options, both command line and config file
1903
1904
parser = argparse.ArgumentParser()
1905
parser.add_argument("-v", "--version", action="version",
1906
version = "%%(prog)s %s" % version,
1907
help="show version number and exit")
1908
parser.add_argument("-i", "--interface", metavar="IF",
1909
help="Bind to interface IF")
1910
parser.add_argument("-a", "--address",
1911
help="Address to listen for requests on")
1912
parser.add_argument("-p", "--port", type=int,
1913
help="Port number to receive requests on")
1914
parser.add_argument("--check", action="store_true",
1915
help="Run self-test")
1916
parser.add_argument("--debug", action="store_true",
1917
help="Debug mode; run in foreground and log"
1918
" to terminal")
1919
parser.add_argument("--debuglevel", metavar="LEVEL",
1920
help="Debug level for stdout output")
1921
parser.add_argument("--priority", help="GnuTLS"
1922
" priority string (see GnuTLS documentation)")
1923
parser.add_argument("--servicename",
1924
metavar="NAME", help="Zeroconf service name")
1925
parser.add_argument("--configdir",
1926
default="/etc/mandos", metavar="DIR",
1927
help="Directory to search for configuration"
1928
" files")
1929
parser.add_argument("--no-dbus", action="store_false",
1930
dest="use_dbus", help="Do not provide D-Bus"
1931
" system bus interface")
1932
parser.add_argument("--no-ipv6", action="store_false",
1933
dest="use_ipv6", help="Do not use IPv6")
1934
parser.add_argument("--no-restore", action="store_false",
1935
dest="restore", help="Do not restore stored state",
1936
default=True)
1937
1938
options = parser.parse_args()
710
1939
711
1940
if options.check:
712
1941
import doctest
721
1950
"priority":
722
1951
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
1952
"servicename": "Mandos",
1953
"use_dbus": "True",
1954
"use_ipv6": "True",
1955
"debuglevel": "",
724
1956
}
725
1957
726
1958
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1959
server_config = configparser.SafeConfigParser(server_defaults)
728
1960
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1961
server_config.read(os.path.join(options.configdir,
1962
"mandos.conf"))
730
1963
# Convert the SafeConfigParser object to a dict
731
1964
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1965
# Use the appropriate methods on the non-string config options
1966
for option in ("debug", "use_dbus", "use_ipv6"):
1967
server_settings[option] = server_config.getboolean("DEFAULT",
1968
option)
1969
if server_settings["port"]:
1970
server_settings["port"] = server_config.getint("DEFAULT",
1971
"port")
735
1972
del server_config
736
1973
737
1974
# Override the settings from the config file with command line
738
1975
# options, if set.
739
1976
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
1977
"priority", "servicename", "configdir",
1978
"use_dbus", "use_ipv6", "debuglevel", "restore"):
741
1979
value = getattr(options, option)
742
1980
if value is not None:
743
1981
server_settings[option] = value
744
1982
del options
1983
# Force all strings to be unicode
1984
for option in server_settings.keys():
1985
if type(server_settings[option]) is str:
1986
server_settings[option] = unicode(server_settings[option])
745
1987
# Now we have our good server settings in "server_settings"
746
1988
1989
##################################################################
1990
1991
# For convenience
747
1992
debug = server_settings["debug"]
1993
debuglevel = server_settings["debuglevel"]
1994
use_dbus = server_settings["use_dbus"]
1995
use_ipv6 = server_settings["use_ipv6"]
748
1996
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
1997
if debug:
1998
initlogger(logging.DEBUG)
1999
else:
2000
if not debuglevel:
2001
initlogger()
2002
else:
2003
level = getattr(logging, debuglevel.upper())
2004
initlogger(level)
752
2005
753
2006
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
2007
syslogger.setFormatter(logging.Formatter
2008
('Mandos (%s) [%%(process)d]:'
2009
' %%(levelname)s: %%(message)s'
757
2010
% server_settings["servicename"]))
758
2011
759
2012
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
2013
client_defaults = { "timeout": "5m",
2014
"extended_timeout": "15m",
2015
"interval": "2m",
2016
"checker": "fping -q -- %%(host)s",
763
2017
"host": "",
2018
"approval_delay": "0s",
2019
"approval_duration": "1s",
764
2020
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
2021
client_config = configparser.SafeConfigParser(client_defaults)
766
2022
client_config.read(os.path.join(server_settings["configdir"],
767
2023
"clients.conf"))
768
2024
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:
2025
global mandos_dbus_service
2026
mandos_dbus_service = None
2027
2028
tcp_server = MandosServer((server_settings["address"],
2029
server_settings["port"]),
2030
ClientHandler,
2031
interface=(server_settings["interface"]
2032
or None),
2033
use_ipv6=use_ipv6,
2034
gnutls_priority=
2035
server_settings["priority"],
2036
use_dbus=use_dbus)
2037
if not debug:
2038
pidfilename = "/var/run/mandos.pid"
2039
try:
2040
pidfile = open(pidfilename, "w")
2041
except IOError:
2042
logger.error("Could not open file %r", pidfilename)
2043
2044
try:
2045
uid = pwd.getpwnam("_mandos").pw_uid
2046
gid = pwd.getpwnam("_mandos").pw_gid
2047
except KeyError:
2048
try:
2049
uid = pwd.getpwnam("mandos").pw_uid
2050
gid = pwd.getpwnam("mandos").pw_gid
2051
except KeyError:
2052
try:
2053
uid = pwd.getpwnam("nobody").pw_uid
2054
gid = pwd.getpwnam("nobody").pw_gid
2055
except KeyError:
2056
uid = 65534
2057
gid = 65534
2058
try:
2059
os.setgid(gid)
798
2060
os.setuid(uid)
799
os.setgid(gid)
800
except OSError, error:
2061
except OSError as error:
801
2062
if error[0] != errno.EPERM:
802
2063
raise error
803
2064
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"])
2065
if debug:
2066
# Enable all possible GnuTLS debugging
2067
2068
# "Use a log level over 10 to enable all debugging options."
2069
# - GnuTLS manual
2070
gnutls.library.functions.gnutls_global_set_log_level(11)
2071
2072
@gnutls.library.types.gnutls_log_func
2073
def debug_gnutls(level, string):
2074
logger.debug("GnuTLS: %s", string[:-1])
2075
2076
(gnutls.library.functions
2077
.gnutls_global_set_log_function(debug_gnutls))
2078
2079
# Redirect stdin so all checkers get /dev/null
2080
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2081
os.dup2(null, sys.stdin.fileno())
2082
if null > 2:
2083
os.close(null)
2084
else:
2085
# No console logging
2086
logger.removeHandler(console)
2087
2088
# Need to fork before connecting to D-Bus
2089
if not debug:
2090
# Close all input and output, do double fork, etc.
2091
daemon()
810
2092
811
2093
global main_loop
812
global bus
813
global server
814
2094
# From the Avahi example code
815
2095
DBusGMainLoop(set_as_default=True )
816
2096
main_loop = gobject.MainLoop()
817
2097
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
2098
# End of Avahi example code
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
837
838
if debug:
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
842
if null > 2:
843
os.close(null)
844
else:
845
# No console logging
846
logger.removeHandler(console)
847
# Close all input and output, do double fork, etc.
848
daemon()
849
850
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
854
del pidfile
855
except IOError, err:
856
logger.error(u"Could not write to file %r with PID %d",
857
pidfilename, pid)
858
except NameError:
859
# "pidfile" was never created
860
pass
861
del pidfilename
2099
if use_dbus:
2100
try:
2101
bus_name = dbus.service.BusName("se.recompile.Mandos",
2102
bus, do_not_queue=True)
2103
old_bus_name = (dbus.service.BusName
2104
("se.bsnet.fukt.Mandos", bus,
2105
do_not_queue=True))
2106
except dbus.exceptions.NameExistsException as e:
2107
logger.error(unicode(e) + ", disabling D-Bus")
2108
use_dbus = False
2109
server_settings["use_dbus"] = False
2110
tcp_server.use_dbus = False
2111
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2112
service = AvahiServiceToSyslog(name =
2113
server_settings["servicename"],
2114
servicetype = "_mandos._tcp",
2115
protocol = protocol, bus = bus)
2116
if server_settings["interface"]:
2117
service.interface = (if_nametoindex
2118
(str(server_settings["interface"])))
2119
2120
global multiprocessing_manager
2121
multiprocessing_manager = multiprocessing.Manager()
2122
2123
client_class = Client
2124
if use_dbus:
2125
client_class = functools.partial(ClientDBusTransitional,
2126
bus = bus)
2127
2128
special_settings = {
2129
# Some settings need to be accessd by special methods;
2130
# booleans need .getboolean(), etc. Here is a list of them:
2131
"approved_by_default":
2132
lambda section:
2133
client_config.getboolean(section, "approved_by_default"),
2134
}
2135
# Construct a new dict of client settings of this form:
2136
# { client_name: {setting_name: value, ...}, ...}
2137
# with exceptions for any special settings as defined above
2138
client_settings = dict((clientname,
2139
dict((setting,
2140
(value if setting not in special_settings
2141
else special_settings[setting](clientname)))
2142
for setting, value in client_config.items(clientname)))
2143
for clientname in client_config.sections())
2144
2145
old_client_settings = {}
2146
clients_data = []
2147
2148
# Get client data and settings from last running state.
2149
if server_settings["restore"]:
2150
try:
2151
with open(stored_state_path, "rb") as stored_state:
2152
clients_data, old_client_settings = pickle.load(stored_state)
2153
os.remove(stored_state_path)
2154
except IOError as e:
2155
logger.warning("Could not load persistant state: {0}".format(e))
2156
if e.errno != errno.ENOENT:
2157
raise
2158
2159
for client in clients_data:
2160
client_name = client["name"]
2161
2162
# Decide which value to use after restoring saved state.
2163
# We have three different values: Old config file,
2164
# new config file, and saved state.
2165
# New config value takes precedence if it differs from old
2166
# config value, otherwise use saved state.
2167
for name, value in client_settings[client_name].items():
2168
try:
2169
# For each value in new config, check if it differs
2170
# from the old config value (Except for the "secret"
2171
# attribute)
2172
if name != "secret" and value != old_client_settings[client_name][name]:
2173
setattr(client, name, value)
2174
except KeyError:
2175
pass
2176
2177
# Clients who has passed its expire date, can still be enabled if its
2178
# last checker was sucessful. Clients who checkers failed before we
2179
# stored it state is asumed to had failed checker during downtime.
2180
if client["enabled"] and client["last_checked_ok"]:
2181
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2182
> client["interval"]):
2183
if client["last_checker_status"] != 0:
2184
client["enabled"] = False
2185
else:
2186
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2187
2188
client["changedstate"] = (multiprocessing_manager
2189
.Condition(multiprocessing_manager
2190
.Lock()))
2191
if use_dbus:
2192
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2193
tcp_server.clients[client_name] = new_client
2194
new_client.bus = bus
2195
for name, value in client.iteritems():
2196
setattr(new_client, name, value)
2197
client_object_name = unicode(client_name).translate(
2198
{ord("."): ord("_"),
2199
ord("-"): ord("_")})
2200
new_client.dbus_object_path = (dbus.ObjectPath
2201
("/clients/" + client_object_name))
2202
DBusObjectWithProperties.__init__(new_client,
2203
new_client.bus,
2204
new_client.dbus_object_path)
2205
else:
2206
tcp_server.clients[client_name] = Client.__new__(Client)
2207
for name, value in client.iteritems():
2208
setattr(tcp_server.clients[client_name], name, value)
2209
2210
tcp_server.clients[client_name].decrypt_secret(
2211
client_settings[client_name]["secret"])
2212
2213
# Create/remove clients based on new changes made to config
2214
for clientname in set(old_client_settings) - set(client_settings):
2215
del tcp_server.clients[clientname]
2216
for clientname in set(client_settings) - set(old_client_settings):
2217
tcp_server.clients[clientname] = (client_class(name = clientname,
2218
config =
2219
client_settings
2220
[clientname]))
2221
2222
2223
if not tcp_server.clients:
2224
logger.warning("No clients defined")
2225
2226
if not debug:
2227
try:
2228
with pidfile:
2229
pid = os.getpid()
2230
pidfile.write(str(pid) + "\n".encode("utf-8"))
2231
del pidfile
2232
except IOError:
2233
logger.error("Could not write to file %r with PID %d",
2234
pidfilename, pid)
2235
except NameError:
2236
# "pidfile" was never created
2237
pass
2238
del pidfilename
2239
2240
signal.signal(signal.SIGINT, signal.SIG_IGN)
2241
2242
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2243
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2244
2245
if use_dbus:
2246
class MandosDBusService(dbus.service.Object):
2247
"""A D-Bus proxy object"""
2248
def __init__(self):
2249
dbus.service.Object.__init__(self, bus, "/")
2250
_interface = "se.recompile.Mandos"
2251
2252
@dbus.service.signal(_interface, signature="o")
2253
def ClientAdded(self, objpath):
2254
"D-Bus signal"
2255
pass
2256
2257
@dbus.service.signal(_interface, signature="ss")
2258
def ClientNotFound(self, fingerprint, address):
2259
"D-Bus signal"
2260
pass
2261
2262
@dbus.service.signal(_interface, signature="os")
2263
def ClientRemoved(self, objpath, name):
2264
"D-Bus signal"
2265
pass
2266
2267
@dbus.service.method(_interface, out_signature="ao")
2268
def GetAllClients(self):
2269
"D-Bus method"
2270
return dbus.Array(c.dbus_object_path
2271
for c in
2272
tcp_server.clients.itervalues())
2273
2274
@dbus.service.method(_interface,
2275
out_signature="a{oa{sv}}")
2276
def GetAllClientsWithProperties(self):
2277
"D-Bus method"
2278
return dbus.Dictionary(
2279
((c.dbus_object_path, c.GetAll(""))
2280
for c in tcp_server.clients.itervalues()),
2281
signature="oa{sv}")
2282
2283
@dbus.service.method(_interface, in_signature="o")
2284
def RemoveClient(self, object_path):
2285
"D-Bus method"
2286
for c in tcp_server.clients.itervalues():
2287
if c.dbus_object_path == object_path:
2288
del tcp_server.clients[c.name]
2289
c.remove_from_connection()
2290
# Don't signal anything except ClientRemoved
2291
c.disable(quiet=True)
2292
# Emit D-Bus signal
2293
self.ClientRemoved(object_path, c.name)
2294
return
2295
raise KeyError(object_path)
2296
2297
del _interface
2298
2299
class MandosDBusServiceTransitional(MandosDBusService):
2300
__metaclass__ = AlternateDBusNamesMetaclass
2301
mandos_dbus_service = MandosDBusServiceTransitional()
862
2302
863
2303
def cleanup():
864
2304
"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()
2305
service.cleanup()
2306
2307
multiprocessing.active_children()
2308
if not (tcp_server.clients or client_settings):
2309
return
2310
2311
# Store client before exiting. Secrets are encrypted with key based
2312
# on what config file has. If config file is removed/edited, old
2313
# secret will thus be unrecovable.
2314
clients = []
2315
for client in tcp_server.clients.itervalues():
2316
client.encrypt_secret(client_settings[client.name]["secret"])
2317
2318
client_dict = {}
2319
2320
# A list of attributes that will not be stored when shuting down.
2321
exclude = set(("bus", "changedstate", "secret"))
2322
for name, typ in inspect.getmembers(dbus.service.Object):
2323
exclude.add(name)
2324
2325
client_dict["encrypted_secret"] = client.encrypted_secret
2326
for attr in client.client_structure:
2327
if attr not in exclude:
2328
client_dict[attr] = getattr(client, attr)
2329
2330
clients.append(client_dict)
2331
del client_settings[client.name]["secret"]
2332
2333
try:
2334
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2335
pickle.dump((clients, client_settings), stored_state)
2336
except IOError as e:
2337
logger.warning("Could not save persistant state: {0}".format(e))
2338
if e.errno != errno.ENOENT:
2339
raise
2340
2341
# Delete all clients, and settings from config
2342
while tcp_server.clients:
2343
name, client = tcp_server.clients.popitem()
2344
if use_dbus:
2345
client.remove_from_connection()
2346
# Don't signal anything except ClientRemoved
2347
client.disable(quiet=True)
2348
if use_dbus:
2349
# Emit D-Bus signal
2350
mandos_dbus_service.ClientRemoved(client
2351
.dbus_object_path,
2352
client.name)
2353
client_settings.clear()
876
2354
877
2355
atexit.register(cleanup)
878
2356
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()
2357
for client in tcp_server.clients.itervalues():
2358
if use_dbus:
2359
# Emit D-Bus signal
2360
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2361
# Need to initiate checking of clients
2362
if client.enabled:
2363
client.init_checker()
2364
886
2365
887
2366
tcp_server.enable()
888
2367
tcp_server.server_activate()
889
2368
890
2369
# Find out what port we got
891
2370
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())
2371
if use_ipv6:
2372
logger.info("Now listening on address %r, port %d,"
2373
" flowinfo %d, scope_id %d"
2374
% tcp_server.socket.getsockname())
2375
else: # IPv4
2376
logger.info("Now listening on address %r, port %d"
2377
% tcp_server.socket.getsockname())
894
2378
895
2379
#service.interface = tcp_server.socket.getsockname()[3]
896
2380
897
2381
try:
898
2382
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
2383
try:
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
2384
service.activate()
2385
except dbus.exceptions.DBusException as error:
2386
logger.critical("DBusException: %s", error)
2387
cleanup()
904
2388
sys.exit(1)
905
2389
# End of Avahi example code
906
2390
907
2391
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
2392
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2393
(tcp_server.handle_request
2394
(*args[2:], **kwargs) or True))
911
2395
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
2396
logger.debug("Starting main loop")
914
2397
main_loop.run()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2398
except AvahiError as error:
2399
logger.critical("AvahiError: %s", error)
2400
cleanup()
917
2401
sys.exit(1)
918
2402
except KeyboardInterrupt:
919
2403
if debug:
920
print
2404
print("", file=sys.stderr)
2405
logger.debug("Server received KeyboardInterrupt")
2406
logger.debug("Server exiting")
2407
# Must run before the D-Bus bus name gets deregistered
2408
cleanup()
2409
921
2410
922
2411
if __name__ == '__main__':
923
2412
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0