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- Committer: teddy at bsnet
- Date: 2010-08-31 18:22:25 UTC
- mto: (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 421.
- Revision ID: teddy@fukt.bsnet.se-20100831182225-sad2cgilj3jeduab
* mandos-monitor (MandosClientWidget): Accept new signal
"NeedApproval".
(MandosClientWidget.checker_completed): Don't log successful
checkers.
(MandosClientWidget.checker_started): Don't log.
(MandosClientWidget.need_approval): New; just log a message.
(MandosClientWidget.rejected): Take an additional "reason" argument.
(MandosClientWidget.keypress): Accept "+" and "-" keys to accept or
reject, respectively.
"NeedApproval".
(MandosClientWidget.checker_completed): Don't log successful
checkers.
(MandosClientWidget.checker_started): Don't log.
(MandosClientWidget.need_approval): New; just log a message.
(MandosClientWidget.rejected): Take an additional "reason" argument.
(MandosClientWidget.keypress): Accept "+" and "-" keys to accept or
reject, respectively.
- files added:
- .bzr-builddeb
- debian
- debian/po
- 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
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
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#
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13
# Everything else is
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 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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# Contact the authors at <mandos@fukt.bsnet.se>.
31
32
#
32
33
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from __future__ import division
34
from __future__ import division, with_statement, absolute_import
34
35
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import SocketServer
36
import SocketServer as socketserver
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import socket
37
import select
38
from optparse import OptionParser
38
import optparse
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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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45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser
47
import ConfigParser as configparser
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import sys
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49
import re
50
50
import os
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import signal
52
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
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57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
59
64
60
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import dbus
66
import dbus.service
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import gobject
62
68
import avahi
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from dbus.mainloop.glib import DBusGMainLoop
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70
import ctypes
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66
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\
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('Mandos: %(levelname)s: %(message)s'))
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import ctypes.util
72
import xml.dom.minidom
73
import inspect
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75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
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version = "1.0.14"
85
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logger = logging.getLogger(u'mandos')
87
syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
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(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
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logger.addHandler(syslogger)
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94
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
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' %(message)s'))
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console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
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u' %(levelname)s:'
98
u' %(message)s'))
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logger.addHandler(console)
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multiprocessing_manager = multiprocessing.Manager()
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class AvahiError(Exception):
82
def __init__(self, value):
104
def __init__(self, value, *args, **kwargs):
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105
self.value = value
84
def __str__(self):
85
return repr(self.value)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
86
109
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class AvahiServiceError(AvahiError):
88
111
pass
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
119
96
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Attributes:
97
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interface: integer; avahi.IF_UNSPEC or an interface index.
98
122
Used to optionally bind to the specified interface.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
123
name: string; Example: u'Mandos'
124
type: string; Example: u'_mandos._tcp'.
101
125
See <http://www.dns-sd.org/ServiceTypes.html>
102
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port: integer; what port to announce
103
127
TXT: list of strings; TXT record for the service
106
130
max_renames: integer; maximum number of renames
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131
rename_count: integer; counter so we only rename after collisions
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132
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
109
136
"""
110
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
138
servicetype = None, port = None, TXT = None,
139
domain = u"", host = u"", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
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self.interface = interface
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142
self.name = name
115
self.type = type
143
self.type = servicetype
116
144
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
145
self.TXT = TXT if TXT is not None else []
121
146
self.domain = domain
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147
self.host = host
123
148
self.rename_count = 0
124
149
self.max_renames = max_renames
150
self.protocol = protocol
151
self.group = None # our entry group
152
self.server = None
153
self.bus = bus
125
154
def rename(self):
126
155
"""Derived from the Avahi example code"""
127
156
if self.rename_count >= self.max_renames:
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157
logger.critical(u"No suitable Zeroconf service name found"
129
158
u" after %i retries, exiting.",
130
rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
159
self.rename_count)
160
raise AvahiServiceError(u"Too many renames")
161
self.name = self.server.GetAlternativeServiceName(self.name)
133
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logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
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syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
163
unicode(self.name))
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syslogger.setFormatter(logging.Formatter
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(u'Mandos (%s) [%%(process)d]:'
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u' %%(levelname)s: %%(message)s'
167
% self.name))
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self.remove()
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169
self.add()
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self.rename_count += 1
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171
def remove(self):
142
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"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
173
if self.group is not None:
174
self.group.Reset()
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175
def add(self):
146
176
"""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)
177
if self.group is None:
178
self.group = dbus.Interface(
179
self.bus.get_object(avahi.DBUS_NAME,
180
self.server.EntryGroupNew()),
181
avahi.DBUS_INTERFACE_ENTRY_GROUP)
182
self.group.connect_to_signal('StateChanged',
183
self
184
.entry_group_state_changed)
155
185
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
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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
186
self.name, self.type)
187
self.group.AddService(
188
self.interface,
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self.protocol,
190
dbus.UInt32(0), # flags
191
self.name, self.type,
192
self.domain, self.host,
193
dbus.UInt16(self.port),
194
avahi.string_array_to_txt_array(self.TXT))
195
self.group.Commit()
196
def entry_group_state_changed(self, state, error):
197
"""Derived from the Avahi example code"""
198
logger.debug(u"Avahi state change: %i", state)
199
200
if state == avahi.ENTRY_GROUP_ESTABLISHED:
201
logger.debug(u"Zeroconf service established.")
202
elif state == avahi.ENTRY_GROUP_COLLISION:
203
logger.warning(u"Zeroconf service name collision.")
204
self.rename()
205
elif state == avahi.ENTRY_GROUP_FAILURE:
206
logger.critical(u"Avahi: Error in group state changed %s",
207
unicode(error))
208
raise AvahiGroupError(u"State changed: %s"
209
% unicode(error))
210
def cleanup(self):
211
"""Derived from the Avahi example code"""
212
if self.group is not None:
213
self.group.Free()
214
self.group = None
215
def server_state_changed(self, state):
216
"""Derived from the Avahi example code"""
217
if state == avahi.SERVER_COLLISION:
218
logger.error(u"Zeroconf server name collision")
219
self.remove()
220
elif state == avahi.SERVER_RUNNING:
221
self.add()
222
def activate(self):
223
"""Derived from the Avahi example code"""
224
if self.server is None:
225
self.server = dbus.Interface(
226
self.bus.get_object(avahi.DBUS_NAME,
227
avahi.DBUS_PATH_SERVER),
228
avahi.DBUS_INTERFACE_SERVER)
229
self.server.connect_to_signal(u"StateChanged",
230
self.server_state_changed)
231
self.server_state_changed(self.server.GetState())
170
232
171
233
172
234
class Client(object):
173
235
"""A representation of a client host served by this server.
236
174
237
Attributes:
175
name: string; from the config file, used in log messages
238
name: string; from the config file, used in log messages and
239
D-Bus identifiers
176
240
fingerprint: string (40 or 32 hexadecimal digits); used to
177
241
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.
242
secret: bytestring; sent verbatim (over TLS) to client
243
host: string; available for use by the checker command
244
created: datetime.datetime(); (UTC) object creation
245
last_enabled: datetime.datetime(); (UTC)
246
enabled: bool()
247
last_checked_ok: datetime.datetime(); (UTC) or None
248
timeout: datetime.timedelta(); How long from last_checked_ok
249
until this client is disabled
250
interval: datetime.timedelta(); How often to start a new checker
251
disable_hook: If set, called by disable() as disable_hook(self)
252
checker: subprocess.Popen(); a running checker process used
253
to see if the client lives.
254
'None' if no process is running.
189
255
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
256
disable_initiator_tag: - '' -
191
257
checker_callback_tag: - '' -
192
258
checker_command: string; External command which is run to check if
193
259
client lives. %() expansions are done at
194
260
runtime with vars(self) as dict, so that for
195
261
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: - '' -
262
current_checker_command: string; current running checker_command
263
approved_delay: datetime.timedelta(); Time to wait for approval
264
_approved: bool(); 'None' if not yet approved/disapproved
265
approved_duration: datetime.timedelta(); Duration of one approval
201
266
"""
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={}):
267
268
@staticmethod
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
275
def timeout_milliseconds(self):
276
"Return the 'timeout' attribute in milliseconds"
277
return self._timedelta_to_milliseconds(self.timeout)
278
279
def interval_milliseconds(self):
280
"Return the 'interval' attribute in milliseconds"
281
return self._timedelta_to_milliseconds(self.interval)
282
283
def approved_delay_milliseconds(self):
284
return self._timedelta_to_milliseconds(self.approved_delay)
285
286
def __init__(self, name = None, disable_hook=None, config=None):
226
287
"""Note: the 'checker' key in 'config' sets the
227
288
'checker_command' attribute and *not* the 'checker'
228
289
attribute."""
229
290
self.name = name
291
if config is None:
292
config = {}
230
293
logger.debug(u"Creating client %r", self.name)
231
294
# Uppercase and remove spaces from fingerprint for later
232
295
# comparison purposes with return value from the fingerprint()
233
296
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
236
299
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
300
if u"secret" in config:
301
self.secret = config[u"secret"].decode(u"base64")
302
elif u"secfile" in config:
303
with open(os.path.expanduser(os.path.expandvars
304
(config[u"secfile"])),
305
"rb") as secfile:
306
self.secret = secfile.read()
243
307
else:
308
#XXX Need to allow secret on demand!
244
309
raise TypeError(u"No secret or secfile for client %s"
245
310
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
311
self.host = config.get(u"host", u"")
312
self.created = datetime.datetime.utcnow()
313
self.enabled = False
314
self.last_enabled = None
248
315
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
316
self.timeout = string_to_delta(config[u"timeout"])
317
self.interval = string_to_delta(config[u"interval"])
318
self.disable_hook = disable_hook
252
319
self.checker = None
253
320
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
321
self.disable_initiator_tag = None
255
322
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
323
self.checker_command = config[u"checker"]
324
self.current_checker_command = None
325
self.last_connect = None
326
self.approvals_pending = 0
327
self._approved = None
328
self.approved_by_default = config.get(u"approved_by_default",
329
True)
330
self.approved_delay = string_to_delta(
331
config[u"approved_delay"])
332
self.approved_duration = string_to_delta(
333
config[u"approved_duration"])
334
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
335
336
def send_changedstate(self):
337
self.changedstate.acquire()
338
self.changedstate.notify_all()
339
self.changedstate.release()
340
341
def enable(self):
258
342
"""Start this client's checker and timeout hooks"""
343
if getattr(self, u"enabled", False):
344
# Already enabled
345
return
346
self.send_changedstate()
347
self.last_enabled = datetime.datetime.utcnow()
259
348
# Schedule a new checker to be started an 'interval' from now,
260
349
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
350
self.checker_initiator_tag = (gobject.timeout_add
351
(self.interval_milliseconds(),
352
self.start_checker))
353
# Schedule a disable() when 'timeout' has passed
354
self.disable_initiator_tag = (gobject.timeout_add
355
(self.timeout_milliseconds(),
356
self.disable))
357
self.enabled = True
264
358
# Also start a new checker *right now*.
265
359
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:
360
361
def disable(self, quiet=True):
362
"""Disable this client."""
363
if not getattr(self, "enabled", False):
279
364
return False
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
365
if not quiet:
366
self.send_changedstate()
367
if not quiet:
368
logger.info(u"Disabling client %s", self.name)
369
if getattr(self, u"disable_initiator_tag", False):
370
gobject.source_remove(self.disable_initiator_tag)
371
self.disable_initiator_tag = None
372
if getattr(self, u"checker_initiator_tag", False):
284
373
gobject.source_remove(self.checker_initiator_tag)
285
374
self.checker_initiator_tag = None
286
375
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
376
if self.disable_hook:
377
self.disable_hook(self)
378
self.enabled = False
289
379
# Do not run this again if called by a gobject.timeout_add
290
380
return False
381
291
382
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
383
self.disable_hook = None
384
self.disable()
385
386
def checker_callback(self, pid, condition, command):
295
387
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
388
self.checker_callback_tag = None
298
389
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):
390
if os.WIFEXITED(condition):
391
exitstatus = os.WEXITSTATUS(condition)
392
if exitstatus == 0:
393
logger.info(u"Checker for %(name)s succeeded",
394
vars(self))
395
self.checked_ok()
396
else:
397
logger.info(u"Checker for %(name)s failed",
398
vars(self))
399
else:
309
400
logger.warning(u"Checker for %(name)s crashed?",
310
401
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
402
403
def checked_ok(self):
404
"""Bump up the timeout for this client.
405
406
This should only be called when the client has been seen,
407
alive and well.
408
"""
409
self.last_checked_ok = datetime.datetime.utcnow()
410
gobject.source_remove(self.disable_initiator_tag)
411
self.disable_initiator_tag = (gobject.timeout_add
412
(self.timeout_milliseconds(),
413
self.disable))
414
314
415
def start_checker(self):
315
416
"""Start a new checker subprocess if one is not running.
417
316
418
If a checker already exists, leave it running and do
317
419
nothing."""
318
420
# The reason for not killing a running checker is that if we
321
423
# client would inevitably timeout, since no checker would get
322
424
# a chance to run to completion. If we instead leave running
323
425
# 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.
426
# than 'timeout' for the client to be disabled, which is as it
427
# should be.
428
429
# If a checker exists, make sure it is not a zombie
430
try:
431
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
432
except (AttributeError, OSError), error:
433
if (isinstance(error, OSError)
434
and error.errno != errno.ECHILD):
435
raise error
436
else:
437
if pid:
438
logger.warning(u"Checker was a zombie")
439
gobject.source_remove(self.checker_callback_tag)
440
self.checker_callback(pid, status,
441
self.current_checker_command)
442
# Start a new checker if needed
326
443
if self.checker is None:
327
444
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
445
# In case checker_command has exactly one % operator
446
command = self.checker_command % self.host
330
447
except TypeError:
331
448
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
449
escaped_attrs = dict((key,
450
re.escape(unicode(str(val),
451
errors=
452
u'replace')))
333
453
for key, val in
334
454
vars(self).iteritems())
335
455
try:
336
command = self.check_command % escaped_attrs
456
command = self.checker_command % escaped_attrs
337
457
except TypeError, error:
338
458
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
459
u' %s', self.checker_command, error)
340
460
return True # Try again later
461
self.current_checker_command = command
341
462
try:
342
463
logger.info(u"Starting checker %r for %s",
343
464
command, self.name)
347
468
# always replaced by /dev/null.)
348
469
self.checker = subprocess.Popen(command,
349
470
close_fds=True,
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
471
shell=True, cwd=u"/")
472
self.checker_callback_tag = (gobject.child_watch_add
473
(self.checker.pid,
474
self.checker_callback,
475
data=command))
476
# The checker may have completed before the gobject
477
# watch was added. Check for this.
478
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
479
if pid:
480
gobject.source_remove(self.checker_callback_tag)
481
self.checker_callback(pid, status, command)
354
482
except OSError, error:
355
483
logger.error(u"Failed to start subprocess: %s",
356
484
error)
357
485
# Re-run this periodically if run by gobject.timeout_add
358
486
return True
487
359
488
def stop_checker(self):
360
489
"""Force the checker process, if any, to stop."""
361
490
if self.checker_callback_tag:
362
491
gobject.source_remove(self.checker_callback_tag)
363
492
self.checker_callback_tag = None
364
if getattr(self, "checker", None) is None:
493
if getattr(self, u"checker", None) is None:
365
494
return
366
495
logger.debug(u"Stopping checker for %(name)s", vars(self))
367
496
try:
368
497
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
498
#time.sleep(0.5)
370
499
#if self.checker.poll() is None:
371
500
# os.kill(self.checker.pid, signal.SIGKILL)
372
501
except OSError, error:
373
502
if error.errno != errno.ESRCH: # No such process
374
503
raise
375
504
self.checker = None
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
505
506
def dbus_service_property(dbus_interface, signature=u"v",
507
access=u"readwrite", byte_arrays=False):
508
"""Decorators for marking methods of a DBusObjectWithProperties to
509
become properties on the D-Bus.
510
511
The decorated method will be called with no arguments by "Get"
512
and with one argument by "Set".
513
514
The parameters, where they are supported, are the same as
515
dbus.service.method, except there is only "signature", since the
516
type from Get() and the type sent to Set() is the same.
517
"""
518
# Encoding deeply encoded byte arrays is not supported yet by the
519
# "Set" method, so we fail early here:
520
if byte_arrays and signature != u"ay":
521
raise ValueError(u"Byte arrays not supported for non-'ay'"
522
u" signature %r" % signature)
523
def decorator(func):
524
func._dbus_is_property = True
525
func._dbus_interface = dbus_interface
526
func._dbus_signature = signature
527
func._dbus_access = access
528
func._dbus_name = func.__name__
529
if func._dbus_name.endswith(u"_dbus_property"):
530
func._dbus_name = func._dbus_name[:-14]
531
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
532
return func
533
return decorator
534
535
536
class DBusPropertyException(dbus.exceptions.DBusException):
537
"""A base class for D-Bus property-related exceptions
538
"""
539
def __unicode__(self):
540
return unicode(str(self))
541
542
543
class DBusPropertyAccessException(DBusPropertyException):
544
"""A property's access permissions disallows an operation.
545
"""
546
pass
547
548
549
class DBusPropertyNotFound(DBusPropertyException):
550
"""An attempt was made to access a non-existing property.
551
"""
552
pass
553
554
555
class DBusObjectWithProperties(dbus.service.Object):
556
"""A D-Bus object with properties.
557
558
Classes inheriting from this can use the dbus_service_property
559
decorator to expose methods as D-Bus properties. It exposes the
560
standard Get(), Set(), and GetAll() methods on the D-Bus.
561
"""
562
563
@staticmethod
564
def _is_dbus_property(obj):
565
return getattr(obj, u"_dbus_is_property", False)
566
567
def _get_all_dbus_properties(self):
568
"""Returns a generator of (name, attribute) pairs
569
"""
570
return ((prop._dbus_name, prop)
571
for name, prop in
572
inspect.getmembers(self, self._is_dbus_property))
573
574
def _get_dbus_property(self, interface_name, property_name):
575
"""Returns a bound method if one exists which is a D-Bus
576
property with the specified name and interface.
577
"""
578
for name in (property_name,
579
property_name + u"_dbus_property"):
580
prop = getattr(self, name, None)
581
if (prop is None
582
or not self._is_dbus_property(prop)
583
or prop._dbus_name != property_name
584
or (interface_name and prop._dbus_interface
585
and interface_name != prop._dbus_interface)):
586
continue
587
return prop
588
# No such property
589
raise DBusPropertyNotFound(self.dbus_object_path + u":"
590
+ interface_name + u"."
591
+ property_name)
592
593
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
594
out_signature=u"v")
595
def Get(self, interface_name, property_name):
596
"""Standard D-Bus property Get() method, see D-Bus standard.
597
"""
598
prop = self._get_dbus_property(interface_name, property_name)
599
if prop._dbus_access == u"write":
600
raise DBusPropertyAccessException(property_name)
601
value = prop()
602
if not hasattr(value, u"variant_level"):
603
return value
604
return type(value)(value, variant_level=value.variant_level+1)
605
606
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
607
def Set(self, interface_name, property_name, value):
608
"""Standard D-Bus property Set() method, see D-Bus standard.
609
"""
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"read":
612
raise DBusPropertyAccessException(property_name)
613
if prop._dbus_get_args_options[u"byte_arrays"]:
614
# The byte_arrays option is not supported yet on
615
# signatures other than "ay".
616
if prop._dbus_signature != u"ay":
617
raise ValueError
618
value = dbus.ByteArray(''.join(unichr(byte)
619
for byte in value))
620
prop(value)
621
622
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
623
out_signature=u"a{sv}")
624
def GetAll(self, interface_name):
625
"""Standard D-Bus property GetAll() method, see D-Bus
626
standard.
627
628
Note: Will not include properties with access="write".
629
"""
630
all = {}
631
for name, prop in self._get_all_dbus_properties():
632
if (interface_name
633
and interface_name != prop._dbus_interface):
634
# Interface non-empty but did not match
635
continue
636
# Ignore write-only properties
637
if prop._dbus_access == u"write":
638
continue
639
value = prop()
640
if not hasattr(value, u"variant_level"):
641
all[name] = value
642
continue
643
all[name] = type(value)(value, variant_level=
644
value.variant_level+1)
645
return dbus.Dictionary(all, signature=u"sv")
646
647
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
648
out_signature=u"s",
649
path_keyword='object_path',
650
connection_keyword='connection')
651
def Introspect(self, object_path, connection):
652
"""Standard D-Bus method, overloaded to insert property tags.
653
"""
654
xmlstring = dbus.service.Object.Introspect(self, object_path,
655
connection)
656
try:
657
document = xml.dom.minidom.parseString(xmlstring)
658
def make_tag(document, name, prop):
659
e = document.createElement(u"property")
660
e.setAttribute(u"name", name)
661
e.setAttribute(u"type", prop._dbus_signature)
662
e.setAttribute(u"access", prop._dbus_access)
663
return e
664
for if_tag in document.getElementsByTagName(u"interface"):
665
for tag in (make_tag(document, name, prop)
666
for name, prop
667
in self._get_all_dbus_properties()
668
if prop._dbus_interface
669
== if_tag.getAttribute(u"name")):
670
if_tag.appendChild(tag)
671
# Add the names to the return values for the
672
# "org.freedesktop.DBus.Properties" methods
673
if (if_tag.getAttribute(u"name")
674
== u"org.freedesktop.DBus.Properties"):
675
for cn in if_tag.getElementsByTagName(u"method"):
676
if cn.getAttribute(u"name") == u"Get":
677
for arg in cn.getElementsByTagName(u"arg"):
678
if (arg.getAttribute(u"direction")
679
== u"out"):
680
arg.setAttribute(u"name", u"value")
681
elif cn.getAttribute(u"name") == u"GetAll":
682
for arg in cn.getElementsByTagName(u"arg"):
683
if (arg.getAttribute(u"direction")
684
== u"out"):
685
arg.setAttribute(u"name", u"props")
686
xmlstring = document.toxml(u"utf-8")
687
document.unlink()
688
except (AttributeError, xml.dom.DOMException,
689
xml.parsers.expat.ExpatError), error:
690
logger.error(u"Failed to override Introspection method",
691
error)
692
return xmlstring
693
694
695
class ClientDBus(Client, DBusObjectWithProperties):
696
"""A Client class using D-Bus
697
698
Attributes:
699
dbus_object_path: dbus.ObjectPath
700
bus: dbus.SystemBus()
701
"""
702
# dbus.service.Object doesn't use super(), so we can't either.
703
704
def __init__(self, bus = None, *args, **kwargs):
705
self.bus = bus
706
Client.__init__(self, *args, **kwargs)
707
# Only now, when this client is initialized, can it show up on
708
# the D-Bus
709
self.dbus_object_path = (dbus.ObjectPath
710
(u"/clients/"
711
+ self.name.replace(u".", u"_")))
712
DBusObjectWithProperties.__init__(self, self.bus,
713
self.dbus_object_path)
714
715
@staticmethod
716
def _datetime_to_dbus(dt, variant_level=0):
717
"""Convert a UTC datetime.datetime() to a D-Bus type."""
718
return dbus.String(dt.isoformat(),
719
variant_level=variant_level)
720
721
def enable(self):
722
oldstate = getattr(self, u"enabled", False)
723
r = Client.enable(self)
724
if oldstate != self.enabled:
725
# Emit D-Bus signals
726
self.PropertyChanged(dbus.String(u"enabled"),
727
dbus.Boolean(True, variant_level=1))
728
self.PropertyChanged(
729
dbus.String(u"last_enabled"),
730
self._datetime_to_dbus(self.last_enabled,
731
variant_level=1))
732
return r
733
734
def disable(self, quiet = False):
735
oldstate = getattr(self, u"enabled", False)
736
r = Client.disable(self, quiet=quiet)
737
if not quiet and oldstate != self.enabled:
738
# Emit D-Bus signal
739
self.PropertyChanged(dbus.String(u"enabled"),
740
dbus.Boolean(False, variant_level=1))
741
return r
742
743
def __del__(self, *args, **kwargs):
744
try:
745
self.remove_from_connection()
746
except LookupError:
747
pass
748
if hasattr(DBusObjectWithProperties, u"__del__"):
749
DBusObjectWithProperties.__del__(self, *args, **kwargs)
750
Client.__del__(self, *args, **kwargs)
751
752
def checker_callback(self, pid, condition, command,
753
*args, **kwargs):
754
self.checker_callback_tag = None
755
self.checker = None
756
# Emit D-Bus signal
757
self.PropertyChanged(dbus.String(u"checker_running"),
758
dbus.Boolean(False, variant_level=1))
759
if os.WIFEXITED(condition):
760
exitstatus = os.WEXITSTATUS(condition)
761
# Emit D-Bus signal
762
self.CheckerCompleted(dbus.Int16(exitstatus),
763
dbus.Int64(condition),
764
dbus.String(command))
765
else:
766
# Emit D-Bus signal
767
self.CheckerCompleted(dbus.Int16(-1),
768
dbus.Int64(condition),
769
dbus.String(command))
770
771
return Client.checker_callback(self, pid, condition, command,
772
*args, **kwargs)
773
774
def checked_ok(self, *args, **kwargs):
775
r = Client.checked_ok(self, *args, **kwargs)
776
# Emit D-Bus signal
777
self.PropertyChanged(
778
dbus.String(u"last_checked_ok"),
779
(self._datetime_to_dbus(self.last_checked_ok,
780
variant_level=1)))
781
return r
782
783
def start_checker(self, *args, **kwargs):
784
old_checker = self.checker
785
if self.checker is not None:
786
old_checker_pid = self.checker.pid
787
else:
788
old_checker_pid = None
789
r = Client.start_checker(self, *args, **kwargs)
790
# Only if new checker process was started
791
if (self.checker is not None
792
and old_checker_pid != self.checker.pid):
793
# Emit D-Bus signal
794
self.CheckerStarted(self.current_checker_command)
795
self.PropertyChanged(
796
dbus.String(u"checker_running"),
797
dbus.Boolean(True, variant_level=1))
798
return r
799
800
def stop_checker(self, *args, **kwargs):
801
old_checker = getattr(self, u"checker", None)
802
r = Client.stop_checker(self, *args, **kwargs)
803
if (old_checker is not None
804
and getattr(self, u"checker", None) is None):
805
self.PropertyChanged(dbus.String(u"checker_running"),
806
dbus.Boolean(False, variant_level=1))
807
return r
808
809
def _reset_approved(self):
810
self._approved = None
811
return False
812
813
def approve(self, value=True):
814
self._approved = value
815
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))
816
817
def approved_pending(self):
818
return self.approvals_pending > 0
819
820
821
## D-Bus methods, signals & properties
822
_interface = u"se.bsnet.fukt.Mandos.Client"
823
824
## Signals
825
826
# CheckerCompleted - signal
827
@dbus.service.signal(_interface, signature=u"nxs")
828
def CheckerCompleted(self, exitcode, waitstatus, command):
829
"D-Bus signal"
830
pass
831
832
# CheckerStarted - signal
833
@dbus.service.signal(_interface, signature=u"s")
834
def CheckerStarted(self, command):
835
"D-Bus signal"
836
pass
837
838
# PropertyChanged - signal
839
@dbus.service.signal(_interface, signature=u"sv")
840
def PropertyChanged(self, property, value):
841
"D-Bus signal"
842
pass
843
844
# GotSecret - signal
845
@dbus.service.signal(_interface)
846
def GotSecret(self):
847
"D-Bus signal"
848
if self.approved_pending():
849
self.PropertyChanged(dbus.String(u"checker_running"),
850
dbus.Boolean(False, variant_level=1))
851
852
# Rejected - signal
853
@dbus.service.signal(_interface, signature=u"s")
854
def Rejected(self, reason):
855
"D-Bus signal"
856
if self.approved_pending():
857
self.PropertyChanged(dbus.String(u"checker_running"),
858
dbus.Boolean(False, variant_level=1))
859
860
# NeedApproval - signal
861
@dbus.service.signal(_interface, signature=u"db")
862
def NeedApproval(self, timeout, default):
863
"D-Bus signal"
864
if not self.approved_pending():
865
self.PropertyChanged(dbus.String(u"approved_pending"),
866
dbus.Boolean(True, variant_level=1))
867
868
## Methods
869
870
# Approve - method
871
@dbus.service.method(_interface, in_signature=u"b")
872
def Approve(self, value):
873
self.approve(value)
874
875
# CheckedOK - method
876
@dbus.service.method(_interface)
877
def CheckedOK(self):
878
return self.checked_ok()
879
880
# Enable - method
881
@dbus.service.method(_interface)
882
def Enable(self):
883
"D-Bus method"
884
self.enable()
885
886
# StartChecker - method
887
@dbus.service.method(_interface)
888
def StartChecker(self):
889
"D-Bus method"
890
self.start_checker()
891
892
# Disable - method
893
@dbus.service.method(_interface)
894
def Disable(self):
895
"D-Bus method"
896
self.disable()
897
898
# StopChecker - method
899
@dbus.service.method(_interface)
900
def StopChecker(self):
901
self.stop_checker()
902
903
## Properties
904
905
# approved_pending - property
906
@dbus_service_property(_interface, signature=u"b", access=u"read")
907
def approved_pending_dbus_property(self):
908
return dbus.Boolean(self.approved_pending())
909
910
# approved_by_default - property
911
@dbus_service_property(_interface, signature=u"b",
912
access=u"readwrite")
913
def approved_by_default_dbus_property(self):
914
return dbus.Boolean(self.approved_by_default)
915
916
# approved_delay - property
917
@dbus_service_property(_interface, signature=u"t",
918
access=u"readwrite")
919
def approved_delay_dbus_property(self):
920
return dbus.UInt64(self.approved_delay_milliseconds())
921
922
# approved_duration - property
923
@dbus_service_property(_interface, signature=u"t",
924
access=u"readwrite")
925
def approved_duration_dbus_property(self):
926
return dbus.UInt64(self._timedelta_to_milliseconds(
927
self.approved_duration))
928
929
# name - property
930
@dbus_service_property(_interface, signature=u"s", access=u"read")
931
def name_dbus_property(self):
932
return dbus.String(self.name)
933
934
# fingerprint - property
935
@dbus_service_property(_interface, signature=u"s", access=u"read")
936
def fingerprint_dbus_property(self):
937
return dbus.String(self.fingerprint)
938
939
# host - property
940
@dbus_service_property(_interface, signature=u"s",
941
access=u"readwrite")
942
def host_dbus_property(self, value=None):
943
if value is None: # get
944
return dbus.String(self.host)
945
self.host = value
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"host"),
948
dbus.String(value, variant_level=1))
949
950
# created - property
951
@dbus_service_property(_interface, signature=u"s", access=u"read")
952
def created_dbus_property(self):
953
return dbus.String(self._datetime_to_dbus(self.created))
954
955
# last_enabled - property
956
@dbus_service_property(_interface, signature=u"s", access=u"read")
957
def last_enabled_dbus_property(self):
958
if self.last_enabled is None:
959
return dbus.String(u"")
960
return dbus.String(self._datetime_to_dbus(self.last_enabled))
961
962
# enabled - property
963
@dbus_service_property(_interface, signature=u"b",
964
access=u"readwrite")
965
def enabled_dbus_property(self, value=None):
966
if value is None: # get
967
return dbus.Boolean(self.enabled)
968
if value:
969
self.enable()
970
else:
971
self.disable()
972
973
# last_checked_ok - property
974
@dbus_service_property(_interface, signature=u"s",
975
access=u"readwrite")
976
def last_checked_ok_dbus_property(self, value=None):
977
if value is not None:
978
self.checked_ok()
979
return
379
980
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.
981
return dbus.String(u"")
982
return dbus.String(self._datetime_to_dbus(self
983
.last_checked_ok))
984
985
# timeout - property
986
@dbus_service_property(_interface, signature=u"t",
987
access=u"readwrite")
988
def timeout_dbus_property(self, value=None):
989
if value is None: # get
990
return dbus.UInt64(self.timeout_milliseconds())
991
self.timeout = datetime.timedelta(0, 0, 0, value)
992
# Emit D-Bus signal
993
self.PropertyChanged(dbus.String(u"timeout"),
994
dbus.UInt64(value, variant_level=1))
995
if getattr(self, u"disable_initiator_tag", None) is None:
996
return
997
# Reschedule timeout
998
gobject.source_remove(self.disable_initiator_tag)
999
self.disable_initiator_tag = None
1000
time_to_die = (self.
1001
_timedelta_to_milliseconds((self
1002
.last_checked_ok
1003
+ self.timeout)
1004
- datetime.datetime
1005
.utcnow()))
1006
if time_to_die <= 0:
1007
# The timeout has passed
1008
self.disable()
1009
else:
1010
self.disable_initiator_tag = (gobject.timeout_add
1011
(time_to_die, self.disable))
1012
1013
# interval - property
1014
@dbus_service_property(_interface, signature=u"t",
1015
access=u"readwrite")
1016
def interval_dbus_property(self, value=None):
1017
if value is None: # get
1018
return dbus.UInt64(self.interval_milliseconds())
1019
self.interval = datetime.timedelta(0, 0, 0, value)
1020
# Emit D-Bus signal
1021
self.PropertyChanged(dbus.String(u"interval"),
1022
dbus.UInt64(value, variant_level=1))
1023
if getattr(self, u"checker_initiator_tag", None) is None:
1024
return
1025
# Reschedule checker run
1026
gobject.source_remove(self.checker_initiator_tag)
1027
self.checker_initiator_tag = (gobject.timeout_add
1028
(value, self.start_checker))
1029
self.start_checker() # Start one now, too
1030
1031
# checker - property
1032
@dbus_service_property(_interface, signature=u"s",
1033
access=u"readwrite")
1034
def checker_dbus_property(self, value=None):
1035
if value is None: # get
1036
return dbus.String(self.checker_command)
1037
self.checker_command = value
1038
# Emit D-Bus signal
1039
self.PropertyChanged(dbus.String(u"checker"),
1040
dbus.String(self.checker_command,
1041
variant_level=1))
1042
1043
# checker_running - property
1044
@dbus_service_property(_interface, signature=u"b",
1045
access=u"readwrite")
1046
def checker_running_dbus_property(self, value=None):
1047
if value is None: # get
1048
return dbus.Boolean(self.checker is not None)
1049
if value:
1050
self.start_checker()
1051
else:
1052
self.stop_checker()
1053
1054
# object_path - property
1055
@dbus_service_property(_interface, signature=u"o", access=u"read")
1056
def object_path_dbus_property(self):
1057
return self.dbus_object_path # is already a dbus.ObjectPath
1058
1059
# secret = property
1060
@dbus_service_property(_interface, signature=u"ay",
1061
access=u"write", byte_arrays=True)
1062
def secret_dbus_property(self, value):
1063
self.secret = str(value)
1064
1065
del _interface
1066
1067
1068
class ProxyClient(object):
1069
def __init__(self, child_pipe, fpr, address):
1070
self._pipe = child_pipe
1071
self._pipe.send(('init', fpr, address))
1072
if not self._pipe.recv():
1073
raise KeyError()
1074
1075
def __getattribute__(self, name):
1076
if(name == '_pipe'):
1077
return super(ProxyClient, self).__getattribute__(name)
1078
self._pipe.send(('getattr', name))
1079
data = self._pipe.recv()
1080
if data[0] == 'data':
1081
return data[1]
1082
if data[0] == 'function':
1083
def func(*args, **kwargs):
1084
self._pipe.send(('funcall', name, args, kwargs))
1085
return self._pipe.recv()[1]
1086
return func
1087
1088
def __setattr__(self, name, value):
1089
if(name == '_pipe'):
1090
return super(ProxyClient, self).__setattr__(name, value)
1091
self._pipe.send(('setattr', name, value))
1092
1093
1094
class ClientHandler(socketserver.BaseRequestHandler, object):
1095
"""A class to handle client connections.
1096
1097
Instantiated once for each connection to handle it.
442
1098
Note: This will run in its own forked process."""
443
1099
444
1100
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.
1101
with contextlib.closing(self.server.child_pipe) as child_pipe:
1102
logger.info(u"TCP connection from: %s",
1103
unicode(self.client_address))
1104
logger.debug(u"Pipe FD: %d",
1105
self.server.child_pipe.fileno())
1106
1107
session = (gnutls.connection
1108
.ClientSession(self.request,
1109
gnutls.connection
1110
.X509Credentials()))
1111
1112
# Note: gnutls.connection.X509Credentials is really a
1113
# generic GnuTLS certificate credentials object so long as
1114
# no X.509 keys are added to it. Therefore, we can use it
1115
# here despite using OpenPGP certificates.
1116
1117
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1118
# u"+AES-256-CBC", u"+SHA1",
1119
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1120
# u"+DHE-DSS"))
1121
# Use a fallback default, since this MUST be set.
1122
priority = self.server.gnutls_priority
1123
if priority is None:
1124
priority = u"NORMAL"
1125
(gnutls.library.functions
1126
.gnutls_priority_set_direct(session._c_object,
1127
priority, None))
1128
1129
# Start communication using the Mandos protocol
1130
# Get protocol number
1131
line = self.request.makefile().readline()
1132
logger.debug(u"Protocol version: %r", line)
1133
try:
1134
if int(line.strip().split()[0]) > 1:
1135
raise RuntimeError
1136
except (ValueError, IndexError, RuntimeError), error:
1137
logger.error(u"Unknown protocol version: %s", error)
1138
return
1139
1140
# Start GnuTLS connection
1141
try:
1142
session.handshake()
1143
except gnutls.errors.GNUTLSError, error:
1144
logger.warning(u"Handshake failed: %s", error)
1145
# Do not run session.bye() here: the session is not
1146
# established. Just abandon the request.
1147
return
1148
logger.debug(u"Handshake succeeded")
1149
1150
approval_required = False
1151
try:
1152
try:
1153
fpr = self.fingerprint(self.peer_certificate
1154
(session))
1155
except (TypeError, gnutls.errors.GNUTLSError), error:
1156
logger.warning(u"Bad certificate: %s", error)
1157
return
1158
logger.debug(u"Fingerprint: %s", fpr)
1159
1160
try:
1161
client = ProxyClient(child_pipe, fpr,
1162
self.client_address)
1163
except KeyError:
1164
return
1165
1166
if client.approved_delay:
1167
delay = client.approved_delay
1168
client.approvals_pending += 1
1169
approval_required = True
1170
1171
while True:
1172
if not client.enabled:
1173
logger.warning(u"Client %s is disabled",
1174
client.name)
1175
if self.server.use_dbus:
1176
# Emit D-Bus signal
1177
client.Rejected("Disabled")
1178
return
1179
1180
if client._approved or not client.approved_delay:
1181
#We are approved or approval is disabled
1182
break
1183
elif client._approved is None:
1184
logger.info(u"Client %s need approval",
1185
client.name)
1186
if self.server.use_dbus:
1187
# Emit D-Bus signal
1188
client.NeedApproval(
1189
client.approved_delay_milliseconds(),
1190
client.approved_by_default)
1191
else:
1192
logger.warning(u"Client %s was not approved",
1193
client.name)
1194
if self.server.use_dbus:
1195
# Emit D-Bus signal
1196
client.Rejected("Disapproved")
1197
return
1198
1199
#wait until timeout or approved
1200
#x = float(client._timedelta_to_milliseconds(delay))
1201
time = datetime.datetime.now()
1202
client.changedstate.acquire()
1203
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1204
client.changedstate.release()
1205
time2 = datetime.datetime.now()
1206
if (time2 - time) >= delay:
1207
if not client.approved_by_default:
1208
logger.warning("Client %s timed out while"
1209
" waiting for approval",
1210
client.name)
1211
if self.server.use_dbus:
1212
# Emit D-Bus signal
1213
client.Rejected("Time out")
1214
return
1215
else:
1216
break
1217
else:
1218
delay -= time2 - time
1219
1220
sent_size = 0
1221
while sent_size < len(client.secret):
1222
# XXX handle session exception
1223
sent = session.send(client.secret[sent_size:])
1224
logger.debug(u"Sent: %d, remaining: %d",
1225
sent, len(client.secret)
1226
- (sent_size + sent))
1227
sent_size += sent
1228
1229
logger.info(u"Sending secret to %s", client.name)
1230
# bump the timeout as if seen
1231
client.checked_ok()
1232
if self.server.use_dbus:
1233
# Emit D-Bus signal
1234
client.GotSecret()
1235
1236
finally:
1237
if approval_required:
1238
client.approvals_pending -= 1
1239
session.bye()
1240
1241
@staticmethod
1242
def peer_certificate(session):
1243
"Return the peer's OpenPGP certificate as a bytestring"
1244
# If not an OpenPGP certificate...
1245
if (gnutls.library.functions
1246
.gnutls_certificate_type_get(session._c_object)
1247
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1248
# ...do the normal thing
1249
return session.peer_certificate
1250
list_size = ctypes.c_uint(1)
1251
cert_list = (gnutls.library.functions
1252
.gnutls_certificate_get_peers
1253
(session._c_object, ctypes.byref(list_size)))
1254
if not bool(cert_list) and list_size.value != 0:
1255
raise gnutls.errors.GNUTLSError(u"error getting peer"
1256
u" certificate")
1257
if list_size.value == 0:
1258
return None
1259
cert = cert_list[0]
1260
return ctypes.string_at(cert.data, cert.size)
1261
1262
@staticmethod
1263
def fingerprint(openpgp):
1264
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1265
# New GnuTLS "datum" with the OpenPGP public key
1266
datum = (gnutls.library.types
1267
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1268
ctypes.POINTER
1269
(ctypes.c_ubyte)),
1270
ctypes.c_uint(len(openpgp))))
1271
# New empty GnuTLS certificate
1272
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1273
(gnutls.library.functions
1274
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1275
# Import the OpenPGP public key into the certificate
1276
(gnutls.library.functions
1277
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1278
gnutls.library.constants
1279
.GNUTLS_OPENPGP_FMT_RAW))
1280
# Verify the self signature in the key
1281
crtverify = ctypes.c_uint()
1282
(gnutls.library.functions
1283
.gnutls_openpgp_crt_verify_self(crt, 0,
1284
ctypes.byref(crtverify)))
1285
if crtverify.value != 0:
1286
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1287
raise (gnutls.errors.CertificateSecurityError
1288
(u"Verify failed"))
1289
# New buffer for the fingerprint
1290
buf = ctypes.create_string_buffer(20)
1291
buf_len = ctypes.c_size_t()
1292
# Get the fingerprint from the certificate into the buffer
1293
(gnutls.library.functions
1294
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1295
ctypes.byref(buf_len)))
1296
# Deinit the certificate
1297
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1298
# Convert the buffer to a Python bytestring
1299
fpr = ctypes.string_at(buf, buf_len.value)
1300
# Convert the bytestring to hexadecimal notation
1301
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1302
return hex_fpr
1303
1304
1305
class MultiprocessingMixIn(object):
1306
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1307
def sub_process_main(self, request, address):
1308
try:
1309
self.finish_request(request, address)
1310
except:
1311
self.handle_error(request, address)
1312
self.close_request(request)
1313
1314
def process_request(self, request, address):
1315
"""Start a new process to process the request."""
1316
multiprocessing.Process(target = self.sub_process_main,
1317
args = (request, address)).start()
1318
1319
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1320
""" adds a pipe to the MixIn """
1321
def process_request(self, request, client_address):
1322
"""Overrides and wraps the original process_request().
1323
1324
This function creates a new pipe in self.pipe
1325
"""
1326
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1327
1328
super(MultiprocessingMixInWithPipe,
1329
self).process_request(request, client_address)
1330
self.add_pipe(parent_pipe)
1331
def add_pipe(self, parent_pipe):
1332
"""Dummy function; override as necessary"""
1333
pass
1334
1335
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1336
socketserver.TCPServer, object):
1337
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1338
518
1339
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1340
enabled: Boolean; whether this server is activated yet
1341
interface: None or a network interface name (string)
1342
use_ipv6: Boolean; to use IPv6 or not
522
1343
"""
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)
1344
def __init__(self, server_address, RequestHandlerClass,
1345
interface=None, use_ipv6=True):
1346
self.interface = interface
1347
if use_ipv6:
1348
self.address_family = socket.AF_INET6
1349
socketserver.TCPServer.__init__(self, server_address,
1350
RequestHandlerClass)
533
1351
def server_bind(self):
534
1352
"""This overrides the normal server_bind() function
535
1353
to bind to an interface if one was specified, and also NOT to
536
1354
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
1355
if self.interface is not None:
1356
if SO_BINDTODEVICE is None:
1357
logger.error(u"SO_BINDTODEVICE does not exist;"
1358
u" cannot bind to interface %s",
1359
self.interface)
1360
else:
1361
try:
1362
self.socket.setsockopt(socket.SOL_SOCKET,
1363
SO_BINDTODEVICE,
1364
str(self.interface
1365
+ u'\0'))
1366
except socket.error, error:
1367
if error[0] == errno.EPERM:
1368
logger.error(u"No permission to"
1369
u" bind to interface %s",
1370
self.interface)
1371
elif error[0] == errno.ENOPROTOOPT:
1372
logger.error(u"SO_BINDTODEVICE not available;"
1373
u" cannot bind to interface %s",
1374
self.interface)
1375
else:
1376
raise
551
1377
# Only bind(2) the socket if we really need to.
552
1378
if self.server_address[0] or self.server_address[1]:
553
1379
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1380
if self.address_family == socket.AF_INET6:
1381
any_address = u"::" # in6addr_any
1382
else:
1383
any_address = socket.INADDR_ANY
1384
self.server_address = (any_address,
556
1385
self.server_address[1])
557
1386
elif not self.server_address[1]:
558
1387
self.server_address = (self.server_address[0],
559
1388
0)
560
# if self.settings["interface"]:
1389
# if self.interface:
561
1390
# self.server_address = (self.server_address[0],
562
1391
# 0, # port
563
1392
# 0, # flowinfo
564
1393
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1394
# (self.interface))
1395
return socketserver.TCPServer.server_bind(self)
1396
1397
1398
class MandosServer(IPv6_TCPServer):
1399
"""Mandos server.
1400
1401
Attributes:
1402
clients: set of Client objects
1403
gnutls_priority GnuTLS priority string
1404
use_dbus: Boolean; to emit D-Bus signals or not
1405
1406
Assumes a gobject.MainLoop event loop.
1407
"""
1408
def __init__(self, server_address, RequestHandlerClass,
1409
interface=None, use_ipv6=True, clients=None,
1410
gnutls_priority=None, use_dbus=True):
1411
self.enabled = False
1412
self.clients = clients
1413
if self.clients is None:
1414
self.clients = set()
1415
self.use_dbus = use_dbus
1416
self.gnutls_priority = gnutls_priority
1417
IPv6_TCPServer.__init__(self, server_address,
1418
RequestHandlerClass,
1419
interface = interface,
1420
use_ipv6 = use_ipv6)
568
1421
def server_activate(self):
569
1422
if self.enabled:
570
return super(type(self), self).server_activate()
1423
return socketserver.TCPServer.server_activate(self)
571
1424
def enable(self):
572
1425
self.enabled = True
1426
def add_pipe(self, parent_pipe):
1427
# Call "handle_ipc" for both data and EOF events
1428
gobject.io_add_watch(parent_pipe.fileno(),
1429
gobject.IO_IN | gobject.IO_HUP,
1430
functools.partial(self.handle_ipc,
1431
parent_pipe = parent_pipe))
1432
1433
def handle_ipc(self, source, condition, parent_pipe=None,
1434
client_object=None):
1435
condition_names = {
1436
gobject.IO_IN: u"IN", # There is data to read.
1437
gobject.IO_OUT: u"OUT", # Data can be written (without
1438
# blocking).
1439
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1440
gobject.IO_ERR: u"ERR", # Error condition.
1441
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1442
# broken, usually for pipes and
1443
# sockets).
1444
}
1445
conditions_string = ' | '.join(name
1446
for cond, name in
1447
condition_names.iteritems()
1448
if cond & condition)
1449
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1450
conditions_string)
1451
1452
# Read a request from the child
1453
request = parent_pipe.recv()
1454
command = request[0]
1455
1456
if command == 'init':
1457
fpr = request[1]
1458
address = request[2]
1459
1460
for c in self.clients:
1461
if c.fingerprint == fpr:
1462
client = c
1463
break
1464
else:
1465
logger.warning(u"Client not found for fingerprint: %s, ad"
1466
u"dress: %s", fpr, address)
1467
if self.use_dbus:
1468
# Emit D-Bus signal
1469
mandos_dbus_service.ClientNotFound(fpr, address)
1470
parent_pipe.send(False)
1471
return False
1472
1473
gobject.io_add_watch(parent_pipe.fileno(),
1474
gobject.IO_IN | gobject.IO_HUP,
1475
functools.partial(self.handle_ipc,
1476
parent_pipe = parent_pipe,
1477
client_object = client))
1478
parent_pipe.send(True)
1479
# remove the old hook in favor of the new above hook on same fileno
1480
return False
1481
if command == 'funcall':
1482
funcname = request[1]
1483
args = request[2]
1484
kwargs = request[3]
1485
1486
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1487
1488
if command == 'getattr':
1489
attrname = request[1]
1490
if callable(client_object.__getattribute__(attrname)):
1491
parent_pipe.send(('function',))
1492
else:
1493
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1494
1495
if command == 'setattr':
1496
attrname = request[1]
1497
value = request[2]
1498
setattr(client_object, attrname, value)
1499
1500
return True
573
1501
574
1502
575
1503
def string_to_delta(interval):
576
1504
"""Parse a string and return a datetime.timedelta
577
578
>>> string_to_delta('7d')
1505
1506
>>> string_to_delta(u'7d')
579
1507
datetime.timedelta(7)
580
>>> string_to_delta('60s')
1508
>>> string_to_delta(u'60s')
581
1509
datetime.timedelta(0, 60)
582
>>> string_to_delta('60m')
1510
>>> string_to_delta(u'60m')
583
1511
datetime.timedelta(0, 3600)
584
>>> string_to_delta('24h')
1512
>>> string_to_delta(u'24h')
585
1513
datetime.timedelta(1)
586
1514
>>> string_to_delta(u'1w')
587
1515
datetime.timedelta(7)
588
>>> string_to_delta('5m 30s')
1516
>>> string_to_delta(u'5m 30s')
589
1517
datetime.timedelta(0, 330)
590
1518
"""
591
1519
timevalue = datetime.timedelta(0)
592
1520
for s in interval.split():
593
1521
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
1522
suffix = unicode(s[-1])
1523
value = int(s[:-1])
596
1524
if suffix == u"d":
597
1525
delta = datetime.timedelta(value)
598
1526
elif suffix == u"s":
604
1532
elif suffix == u"w":
605
1533
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
1534
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
1535
raise ValueError(u"Unknown suffix %r" % suffix)
1536
except (ValueError, IndexError), e:
1537
raise ValueError(e.message)
610
1538
timevalue += delta
611
1539
return timevalue
612
1540
613
1541
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
1542
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
1543
"""Call the C function if_nametoindex(), or equivalent
1544
1545
Note: This function cannot accept a unicode string."""
639
1546
global if_nametoindex
640
1547
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
1548
if_nametoindex = (ctypes.cdll.LoadLibrary
1549
(ctypes.util.find_library(u"c"))
1550
.if_nametoindex)
645
1551
except (OSError, AttributeError):
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
1552
logger.warning(u"Doing if_nametoindex the hard way")
650
1553
def if_nametoindex(interface):
651
1554
"Get an interface index the hard way, i.e. using fcntl()"
652
1555
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]
1556
with contextlib.closing(socket.socket()) as s:
1557
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1558
struct.pack(str(u"16s16x"),
1559
interface))
1560
interface_index = struct.unpack(str(u"I"),
1561
ifreq[16:20])[0]
658
1562
return interface_index
659
1563
return if_nametoindex(interface)
660
1564
661
1565
662
1566
def daemon(nochdir = False, noclose = False):
663
1567
"""See daemon(3). Standard BSD Unix function.
1568
664
1569
This should really exist as os.daemon, but it doesn't (yet)."""
665
1570
if os.fork():
666
1571
sys.exit()
667
1572
os.setsid()
668
1573
if not nochdir:
669
os.chdir("/")
1574
os.chdir(u"/")
670
1575
if os.fork():
671
1576
sys.exit()
672
1577
if not noclose:
674
1579
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
675
1580
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
1581
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
1582
u"%s not a character device"
1583
% os.path.devnull)
678
1584
os.dup2(null, sys.stdin.fileno())
679
1585
os.dup2(null, sys.stdout.fileno())
680
1586
os.dup2(null, sys.stderr.fileno())
683
1589
684
1590
685
1591
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()
1592
1593
##################################################################
1594
# Parsing of options, both command line and config file
1595
1596
parser = optparse.OptionParser(version = "%%prog %s" % version)
1597
parser.add_option("-i", u"--interface", type=u"string",
1598
metavar="IF", help=u"Bind to interface IF")
1599
parser.add_option("-a", u"--address", type=u"string",
1600
help=u"Address to listen for requests on")
1601
parser.add_option("-p", u"--port", type=u"int",
1602
help=u"Port number to receive requests on")
1603
parser.add_option("--check", action=u"store_true",
1604
help=u"Run self-test")
1605
parser.add_option("--debug", action=u"store_true",
1606
help=u"Debug mode; run in foreground and log to"
1607
u" terminal")
1608
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1609
u" priority string (see GnuTLS documentation)")
1610
parser.add_option("--servicename", type=u"string",
1611
metavar=u"NAME", help=u"Zeroconf service name")
1612
parser.add_option("--configdir", type=u"string",
1613
default=u"/etc/mandos", metavar=u"DIR",
1614
help=u"Directory to search for configuration"
1615
u" files")
1616
parser.add_option("--no-dbus", action=u"store_false",
1617
dest=u"use_dbus", help=u"Do not provide D-Bus"
1618
u" system bus interface")
1619
parser.add_option("--no-ipv6", action=u"store_false",
1620
dest=u"use_ipv6", help=u"Do not use IPv6")
1621
options = parser.parse_args()[0]
710
1622
711
1623
if options.check:
712
1624
import doctest
714
1626
sys.exit()
715
1627
716
1628
# Default values for config file for server-global settings
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
1629
server_defaults = { u"interface": u"",
1630
u"address": u"",
1631
u"port": u"",
1632
u"debug": u"False",
1633
u"priority":
1634
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1635
u"servicename": u"Mandos",
1636
u"use_dbus": u"True",
1637
u"use_ipv6": u"True",
724
1638
}
725
1639
726
1640
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1641
server_config = configparser.SafeConfigParser(server_defaults)
728
1642
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1643
server_config.read(os.path.join(options.configdir,
1644
u"mandos.conf"))
730
1645
# Convert the SafeConfigParser object to a dict
731
1646
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1647
# Use the appropriate methods on the non-string config options
1648
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1649
server_settings[option] = server_config.getboolean(u"DEFAULT",
1650
option)
1651
if server_settings["port"]:
1652
server_settings["port"] = server_config.getint(u"DEFAULT",
1653
u"port")
735
1654
del server_config
736
1655
737
1656
# Override the settings from the config file with command line
738
1657
# options, if set.
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
1658
for option in (u"interface", u"address", u"port", u"debug",
1659
u"priority", u"servicename", u"configdir",
1660
u"use_dbus", u"use_ipv6"):
741
1661
value = getattr(options, option)
742
1662
if value is not None:
743
1663
server_settings[option] = value
744
1664
del options
1665
# Force all strings to be unicode
1666
for option in server_settings.keys():
1667
if type(server_settings[option]) is str:
1668
server_settings[option] = unicode(server_settings[option])
745
1669
# Now we have our good server settings in "server_settings"
746
1670
747
debug = server_settings["debug"]
1671
##################################################################
1672
1673
# For convenience
1674
debug = server_settings[u"debug"]
1675
use_dbus = server_settings[u"use_dbus"]
1676
use_ipv6 = server_settings[u"use_ipv6"]
748
1677
749
1678
if not debug:
750
1679
syslogger.setLevel(logging.WARNING)
751
1680
console.setLevel(logging.WARNING)
752
1681
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
1682
if server_settings[u"servicename"] != u"Mandos":
1683
syslogger.setFormatter(logging.Formatter
1684
(u'Mandos (%s) [%%(process)d]:'
1685
u' %%(levelname)s: %%(message)s'
1686
% server_settings[u"servicename"]))
758
1687
759
1688
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
1689
client_defaults = { u"timeout": u"1h",
1690
u"interval": u"5m",
1691
u"checker": u"fping -q -- %%(host)s",
1692
u"host": u"",
1693
u"approved_delay": u"0s",
1694
u"approved_duration": u"1s",
764
1695
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
767
"clients.conf"))
768
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:
1696
client_config = configparser.SafeConfigParser(client_defaults)
1697
client_config.read(os.path.join(server_settings[u"configdir"],
1698
u"clients.conf"))
1699
1700
global mandos_dbus_service
1701
mandos_dbus_service = None
1702
1703
tcp_server = MandosServer((server_settings[u"address"],
1704
server_settings[u"port"]),
1705
ClientHandler,
1706
interface=server_settings[u"interface"],
1707
use_ipv6=use_ipv6,
1708
gnutls_priority=
1709
server_settings[u"priority"],
1710
use_dbus=use_dbus)
1711
pidfilename = u"/var/run/mandos.pid"
1712
try:
1713
pidfile = open(pidfilename, u"w")
1714
except IOError:
1715
logger.error(u"Could not open file %r", pidfilename)
1716
1717
try:
1718
uid = pwd.getpwnam(u"_mandos").pw_uid
1719
gid = pwd.getpwnam(u"_mandos").pw_gid
1720
except KeyError:
1721
try:
1722
uid = pwd.getpwnam(u"mandos").pw_uid
1723
gid = pwd.getpwnam(u"mandos").pw_gid
1724
except KeyError:
1725
try:
1726
uid = pwd.getpwnam(u"nobody").pw_uid
1727
gid = pwd.getpwnam(u"nobody").pw_gid
1728
except KeyError:
1729
uid = 65534
1730
gid = 65534
1731
try:
1732
os.setgid(gid)
798
1733
os.setuid(uid)
799
os.setgid(gid)
800
1734
except OSError, error:
801
1735
if error[0] != errno.EPERM:
802
1736
raise error
803
1737
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"])
1738
# Enable all possible GnuTLS debugging
1739
if debug:
1740
# "Use a log level over 10 to enable all debugging options."
1741
# - GnuTLS manual
1742
gnutls.library.functions.gnutls_global_set_log_level(11)
1743
1744
@gnutls.library.types.gnutls_log_func
1745
def debug_gnutls(level, string):
1746
logger.debug(u"GnuTLS: %s", string[:-1])
1747
1748
(gnutls.library.functions
1749
.gnutls_global_set_log_function(debug_gnutls))
810
1750
811
1751
global main_loop
812
global bus
813
global server
814
1752
# From the Avahi example code
815
1753
DBusGMainLoop(set_as_default=True )
816
1754
main_loop = gobject.MainLoop()
817
1755
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
1756
# 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)
1757
if use_dbus:
1758
try:
1759
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1760
bus, do_not_queue=True)
1761
except dbus.exceptions.NameExistsException, e:
1762
logger.error(unicode(e) + u", disabling D-Bus")
1763
use_dbus = False
1764
server_settings[u"use_dbus"] = False
1765
tcp_server.use_dbus = False
1766
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1767
service = AvahiService(name = server_settings[u"servicename"],
1768
servicetype = u"_mandos._tcp",
1769
protocol = protocol, bus = bus)
1770
if server_settings["interface"]:
1771
service.interface = (if_nametoindex
1772
(str(server_settings[u"interface"])))
1773
1774
client_class = Client
1775
if use_dbus:
1776
client_class = functools.partial(ClientDBus, bus = bus)
1777
def client_config_items(config, section):
1778
special_settings = {
1779
"approved_by_default":
1780
lambda: config.getboolean(section,
1781
"approved_by_default"),
1782
}
1783
for name, value in config.items(section):
1784
try:
1785
yield (name, special_settings[name]())
1786
except KeyError:
1787
yield (name, value)
1788
1789
tcp_server.clients.update(set(
1790
client_class(name = section,
1791
config= dict(client_config_items(
1792
client_config, section)))
1793
for section in client_config.sections()))
1794
if not tcp_server.clients:
1795
logger.warning(u"No clients defined")
837
1796
838
1797
if debug:
839
1798
# Redirect stdin so all checkers get /dev/null
848
1807
daemon()
849
1808
850
1809
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
1810
with pidfile:
1811
pid = os.getpid()
1812
pidfile.write(str(pid) + "\n")
854
1813
del pidfile
855
except IOError, err:
1814
except IOError:
856
1815
logger.error(u"Could not write to file %r with PID %d",
857
1816
pidfilename, pid)
858
1817
except NameError:
860
1819
pass
861
1820
del pidfilename
862
1821
1822
if not debug:
1823
signal.signal(signal.SIGINT, signal.SIG_IGN)
1824
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1825
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1826
1827
if use_dbus:
1828
class MandosDBusService(dbus.service.Object):
1829
"""A D-Bus proxy object"""
1830
def __init__(self):
1831
dbus.service.Object.__init__(self, bus, u"/")
1832
_interface = u"se.bsnet.fukt.Mandos"
1833
1834
@dbus.service.signal(_interface, signature=u"o")
1835
def ClientAdded(self, objpath):
1836
"D-Bus signal"
1837
pass
1838
1839
@dbus.service.signal(_interface, signature=u"ss")
1840
def ClientNotFound(self, fingerprint, address):
1841
"D-Bus signal"
1842
pass
1843
1844
@dbus.service.signal(_interface, signature=u"os")
1845
def ClientRemoved(self, objpath, name):
1846
"D-Bus signal"
1847
pass
1848
1849
@dbus.service.method(_interface, out_signature=u"ao")
1850
def GetAllClients(self):
1851
"D-Bus method"
1852
return dbus.Array(c.dbus_object_path
1853
for c in tcp_server.clients)
1854
1855
@dbus.service.method(_interface,
1856
out_signature=u"a{oa{sv}}")
1857
def GetAllClientsWithProperties(self):
1858
"D-Bus method"
1859
return dbus.Dictionary(
1860
((c.dbus_object_path, c.GetAll(u""))
1861
for c in tcp_server.clients),
1862
signature=u"oa{sv}")
1863
1864
@dbus.service.method(_interface, in_signature=u"o")
1865
def RemoveClient(self, object_path):
1866
"D-Bus method"
1867
for c in tcp_server.clients:
1868
if c.dbus_object_path == object_path:
1869
tcp_server.clients.remove(c)
1870
c.remove_from_connection()
1871
# Don't signal anything except ClientRemoved
1872
c.disable(quiet=True)
1873
# Emit D-Bus signal
1874
self.ClientRemoved(object_path, c.name)
1875
return
1876
raise KeyError(object_path)
1877
1878
del _interface
1879
1880
mandos_dbus_service = MandosDBusService()
1881
863
1882
def cleanup():
864
1883
"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
1884
service.cleanup()
871
1885
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
1886
while tcp_server.clients:
1887
client = tcp_server.clients.pop()
1888
if use_dbus:
1889
client.remove_from_connection()
1890
client.disable_hook = None
1891
# Don't signal anything except ClientRemoved
1892
client.disable(quiet=True)
1893
if use_dbus:
1894
# Emit D-Bus signal
1895
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1896
client.name)
876
1897
877
1898
atexit.register(cleanup)
878
1899
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()
1900
for client in tcp_server.clients:
1901
if use_dbus:
1902
# Emit D-Bus signal
1903
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1904
client.enable()
886
1905
887
1906
tcp_server.enable()
888
1907
tcp_server.server_activate()
889
1908
890
1909
# Find out what port we got
891
1910
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())
1911
if use_ipv6:
1912
logger.info(u"Now listening on address %r, port %d,"
1913
" flowinfo %d, scope_id %d"
1914
% tcp_server.socket.getsockname())
1915
else: # IPv4
1916
logger.info(u"Now listening on address %r, port %d"
1917
% tcp_server.socket.getsockname())
894
1918
895
1919
#service.interface = tcp_server.socket.getsockname()[3]
896
1920
897
1921
try:
898
1922
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
1923
try:
901
server_state_changed(server.GetState())
1924
service.activate()
902
1925
except dbus.exceptions.DBusException, error:
903
1926
logger.critical(u"DBusException: %s", error)
1927
cleanup()
904
1928
sys.exit(1)
905
1929
# End of Avahi example code
906
1930
907
1931
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
1932
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
1933
(tcp_server.handle_request
1934
(*args[2:], **kwargs) or True))
911
1935
912
1936
logger.debug(u"Starting main loop")
913
main_loop_started = True
914
1937
main_loop.run()
915
1938
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
1939
logger.critical(u"AvahiError: %s", error)
1940
cleanup()
917
1941
sys.exit(1)
918
1942
except KeyboardInterrupt:
919
1943
if debug:
920
print
1944
print >> sys.stderr
1945
logger.debug(u"Server received KeyboardInterrupt")
1946
logger.debug(u"Server exiting")
1947
# Must run before the D-Bus bus name gets deregistered
1948
cleanup()
921
1949
922
1950
if __name__ == '__main__':
923
1951
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0