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- Committer: Teddy Hogeborn
- Date: 2009-04-16 06:47:28 UTC
- Revision ID: teddy@fukt.bsnet.se-20090416064728-c3d36mvgxo5q9aoh
* mandos: Import "SocketServer" as "socketserver" and "ConfigParser"
as "configparser". All users changed.
as "configparser". All users changed.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
mandos
11
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# 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 © 2008,2009 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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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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#
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from __future__ import division
34
from __future__ import division, with_statement, absolute_import
33
35
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import SocketServer
36
import SocketServer as socketserver
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import socket
36
import select
37
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
44
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import gnutls.library.constants
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import gnutls.library.types
46
import ConfigParser
47
import ConfigParser as configparser
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import sys
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import re
49
50
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
54
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import stat
55
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import logging
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import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
57
61
58
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import dbus
63
import dbus.service
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import gobject
60
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import avahi
61
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from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
63
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version = "1.0"
65
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logger = logging.Logger('mandos')
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syslogger = logging.handlers.SysLogHandler\
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
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syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
68
import ctypes.util
69
70
try:
71
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
72
except AttributeError:
73
try:
74
from IN import SO_BINDTODEVICE
75
except ImportError:
76
# From /usr/include/asm/socket.h
77
SO_BINDTODEVICE = 25
78
79
80
version = "1.0.8"
81
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logger = logging.Logger(u'mandos')
83
syslogger = (logging.handlers.SysLogHandler
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
75
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:'
94
u' %(message)s'))
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logger.addHandler(console)
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79
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class AvahiError(Exception):
80
def __init__(self, value):
98
def __init__(self, value, *args, **kwargs):
81
99
self.value = value
82
def __str__(self):
83
return repr(self.value)
100
super(AvahiError, self).__init__(value, *args, **kwargs)
101
def __unicode__(self):
102
return unicode(repr(self.value))
84
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85
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class AvahiServiceError(AvahiError):
86
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pass
91
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
113
94
114
Attributes:
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
97
name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
117
name: string; Example: u'Mandos'
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type: string; Example: u'_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
106
126
a sensible number of times
107
127
"""
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
129
servicetype = None, port = None, TXT = None,
130
domain = u"", host = u"", max_renames = 32768,
131
protocol = avahi.PROTO_UNSPEC):
111
132
self.interface = interface
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133
self.name = name
113
self.type = type
134
self.type = servicetype
114
135
self.port = port
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
136
self.TXT = TXT if TXT is not None else []
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137
self.domain = domain
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self.host = host
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139
self.rename_count = 0
140
self.max_renames = max_renames
141
self.protocol = protocol
122
142
def rename(self):
123
143
"""Derived from the Avahi example code"""
124
144
if self.rename_count >= self.max_renames:
125
logger.critical(u"No suitable service name found after %i"
126
u" retries, exiting.", rename_count)
127
raise AvahiServiceError("Too many renames")
128
name = server.GetAlternativeServiceName(name)
129
logger.error(u"Changing name to %r ...", name)
130
syslogger.setFormatter(logging.Formatter\
131
('Mandos (%s): %%(levelname)s:'
132
' %%(message)s' % name))
145
logger.critical(u"No suitable Zeroconf service name found"
146
u" after %i retries, exiting.",
147
self.rename_count)
148
raise AvahiServiceError(u"Too many renames")
149
self.name = server.GetAlternativeServiceName(self.name)
150
logger.info(u"Changing Zeroconf service name to %r ...",
151
self.name)
152
syslogger.setFormatter(logging.Formatter
153
(u'Mandos (%s) [%%(process)d]:'
154
u' %%(levelname)s: %%(message)s'
155
% self.name))
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self.remove()
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self.add()
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self.rename_count += 1
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164
"""Derived from the Avahi example code"""
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global group
143
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if group is None:
144
group = dbus.Interface\
145
(bus.get_object(avahi.DBUS_NAME,
167
group = dbus.Interface(bus.get_object
168
(avahi.DBUS_NAME,
146
169
server.EntryGroupNew()),
147
avahi.DBUS_INTERFACE_ENTRY_GROUP)
170
avahi.DBUS_INTERFACE_ENTRY_GROUP)
148
171
group.connect_to_signal('StateChanged',
149
172
entry_group_state_changed)
150
logger.debug(u"Adding service '%s' of type '%s' ...",
173
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
151
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service.name, service.type)
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group.AddService(
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self.interface, # interface
154
avahi.PROTO_INET6, # protocol
177
self.protocol, # protocol
155
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dbus.UInt32(0), # flags
156
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self.name, self.type,
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self.domain, self.host,
164
187
# End of Avahi example code
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188
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def _datetime_to_dbus(dt, variant_level=0):
191
"""Convert a UTC datetime.datetime() to a D-Bus type."""
192
return dbus.String(dt.isoformat(), variant_level=variant_level)
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194
167
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class Client(object):
168
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"""A representation of a client host served by this server.
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169
198
Attributes:
170
name: string; from the config file, used in log messages
199
name: string; from the config file, used in log messages and
200
D-Bus identifiers
171
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fingerprint: string (40 or 32 hexadecimal digits); used to
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uniquely identify the client
173
secret: bytestring; sent verbatim (over TLS) to client
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host: string; available for use by the checker command
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created: datetime.datetime(); object creation, not client host
176
last_checked_ok: datetime.datetime() or None if not yet checked OK
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timeout: datetime.timedelta(); How long from last_checked_ok
178
until this client is invalid
179
interval: datetime.timedelta(); How often to start a new checker
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stop_hook: If set, called by stop() as stop_hook(self)
181
checker: subprocess.Popen(); a running checker process used
182
to see if the client lives.
183
'None' if no process is running.
203
secret: bytestring; sent verbatim (over TLS) to client
204
host: string; available for use by the checker command
205
created: datetime.datetime(); (UTC) object creation
206
last_enabled: datetime.datetime(); (UTC)
207
enabled: bool()
208
last_checked_ok: datetime.datetime(); (UTC) or None
209
timeout: datetime.timedelta(); How long from last_checked_ok
210
until this client is invalid
211
interval: datetime.timedelta(); How often to start a new checker
212
disable_hook: If set, called by disable() as disable_hook(self)
213
checker: subprocess.Popen(); a running checker process used
214
to see if the client lives.
215
'None' if no process is running.
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checker_initiator_tag: a gobject event source tag, or None
185
stop_initiator_tag: - '' -
217
disable_initiator_tag: - '' -
186
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checker_callback_tag: - '' -
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checker_command: string; External command which is run to check if
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client lives. %() expansions are done at
189
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runtime with vars(self) as dict, so that for
190
222
instance %(name)s can be used in the command.
191
Private attibutes:
192
_timeout: Real variable for 'timeout'
193
_interval: Real variable for 'interval'
194
_timeout_milliseconds: Used when calling gobject.timeout_add()
195
_interval_milliseconds: - '' -
223
current_checker_command: string; current running checker_command
196
224
"""
197
def _set_timeout(self, timeout):
198
"Setter function for 'timeout' attribute"
199
self._timeout = timeout
200
self._timeout_milliseconds = ((self.timeout.days
201
* 24 * 60 * 60 * 1000)
202
+ (self.timeout.seconds * 1000)
203
+ (self.timeout.microseconds
204
// 1000))
205
timeout = property(lambda self: self._timeout,
206
_set_timeout)
207
del _set_timeout
208
def _set_interval(self, interval):
209
"Setter function for 'interval' attribute"
210
self._interval = interval
211
self._interval_milliseconds = ((self.interval.days
212
* 24 * 60 * 60 * 1000)
213
+ (self.interval.seconds
214
* 1000)
215
+ (self.interval.microseconds
216
// 1000))
217
interval = property(lambda self: self._interval,
218
_set_interval)
219
del _set_interval
220
def __init__(self, name = None, stop_hook=None, config={}):
225
226
@staticmethod
227
def _datetime_to_milliseconds(dt):
228
"Convert a datetime.datetime() to milliseconds"
229
return ((dt.days * 24 * 60 * 60 * 1000)
230
+ (dt.seconds * 1000)
231
+ (dt.microseconds // 1000))
232
233
def timeout_milliseconds(self):
234
"Return the 'timeout' attribute in milliseconds"
235
return self._datetime_to_milliseconds(self.timeout)
236
237
def interval_milliseconds(self):
238
"Return the 'interval' attribute in milliseconds"
239
return self._datetime_to_milliseconds(self.interval)
240
241
def __init__(self, name = None, disable_hook=None, config=None):
221
242
"""Note: the 'checker' key in 'config' sets the
222
243
'checker_command' attribute and *not* the 'checker'
223
244
attribute."""
224
245
self.name = name
246
if config is None:
247
config = {}
225
248
logger.debug(u"Creating client %r", self.name)
226
249
# Uppercase and remove spaces from fingerprint for later
227
250
# comparison purposes with return value from the fingerprint()
228
251
# function
229
self.fingerprint = config["fingerprint"].upper()\
230
.replace(u" ", u"")
252
self.fingerprint = (config[u"fingerprint"].upper()
253
.replace(u" ", u""))
231
254
logger.debug(u" Fingerprint: %s", self.fingerprint)
232
if "secret" in config:
233
self.secret = config["secret"].decode(u"base64")
234
elif "secfile" in config:
235
sf = open(config["secfile"])
236
self.secret = sf.read()
237
sf.close()
255
if u"secret" in config:
256
self.secret = config[u"secret"].decode(u"base64")
257
elif u"secfile" in config:
258
with closing(open(os.path.expanduser
259
(os.path.expandvars
260
(config[u"secfile"])))) as secfile:
261
self.secret = secfile.read()
238
262
else:
239
263
raise TypeError(u"No secret or secfile for client %s"
240
264
% self.name)
241
self.host = config.get("host", "")
242
self.created = datetime.datetime.now()
265
self.host = config.get(u"host", u"")
266
self.created = datetime.datetime.utcnow()
267
self.enabled = False
268
self.last_enabled = None
243
269
self.last_checked_ok = None
244
self.timeout = string_to_delta(config["timeout"])
245
self.interval = string_to_delta(config["interval"])
246
self.stop_hook = stop_hook
270
self.timeout = string_to_delta(config[u"timeout"])
271
self.interval = string_to_delta(config[u"interval"])
272
self.disable_hook = disable_hook
247
273
self.checker = None
248
274
self.checker_initiator_tag = None
249
self.stop_initiator_tag = None
275
self.disable_initiator_tag = None
250
276
self.checker_callback_tag = None
251
self.check_command = config["checker"]
252
def start(self):
277
self.checker_command = config[u"checker"]
278
self.current_checker_command = None
279
self.last_connect = None
280
281
def enable(self):
253
282
"""Start this client's checker and timeout hooks"""
283
self.last_enabled = datetime.datetime.utcnow()
254
284
# Schedule a new checker to be started an 'interval' from now,
255
285
# and every interval from then on.
256
self.checker_initiator_tag = gobject.timeout_add\
257
(self._interval_milliseconds,
258
self.start_checker)
286
self.checker_initiator_tag = (gobject.timeout_add
287
(self.interval_milliseconds(),
288
self.start_checker))
259
289
# Also start a new checker *right now*.
260
290
self.start_checker()
261
# Schedule a stop() when 'timeout' has passed
262
self.stop_initiator_tag = gobject.timeout_add\
263
(self._timeout_milliseconds,
264
self.stop)
265
def stop(self):
266
"""Stop this client.
267
The possibility that a client might be restarted is left open,
268
but not currently used."""
269
# If this client doesn't have a secret, it is already stopped.
270
if hasattr(self, "secret") and self.secret:
271
logger.info(u"Stopping client %s", self.name)
272
self.secret = None
273
else:
291
# Schedule a disable() when 'timeout' has passed
292
self.disable_initiator_tag = (gobject.timeout_add
293
(self.timeout_milliseconds(),
294
self.disable))
295
self.enabled = True
296
297
def disable(self):
298
"""Disable this client."""
299
if not getattr(self, "enabled", False):
274
300
return False
275
if getattr(self, "stop_initiator_tag", False):
276
gobject.source_remove(self.stop_initiator_tag)
277
self.stop_initiator_tag = None
278
if getattr(self, "checker_initiator_tag", False):
301
logger.info(u"Disabling client %s", self.name)
302
if getattr(self, u"disable_initiator_tag", False):
303
gobject.source_remove(self.disable_initiator_tag)
304
self.disable_initiator_tag = None
305
if getattr(self, u"checker_initiator_tag", False):
279
306
gobject.source_remove(self.checker_initiator_tag)
280
307
self.checker_initiator_tag = None
281
308
self.stop_checker()
282
if self.stop_hook:
283
self.stop_hook(self)
309
if self.disable_hook:
310
self.disable_hook(self)
311
self.enabled = False
284
312
# Do not run this again if called by a gobject.timeout_add
285
313
return False
314
286
315
def __del__(self):
287
self.stop_hook = None
288
self.stop()
289
def checker_callback(self, pid, condition):
316
self.disable_hook = None
317
self.disable()
318
319
def checker_callback(self, pid, condition, command):
290
320
"""The checker has completed, so take appropriate actions."""
291
now = datetime.datetime.now()
292
321
self.checker_callback_tag = None
293
322
self.checker = None
294
if os.WIFEXITED(condition) \
295
and (os.WEXITSTATUS(condition) == 0):
296
logger.info(u"Checker for %(name)s succeeded",
297
vars(self))
298
self.last_checked_ok = now
299
gobject.source_remove(self.stop_initiator_tag)
300
self.stop_initiator_tag = gobject.timeout_add\
301
(self._timeout_milliseconds,
302
self.stop)
303
elif not os.WIFEXITED(condition):
323
if os.WIFEXITED(condition):
324
exitstatus = os.WEXITSTATUS(condition)
325
if exitstatus == 0:
326
logger.info(u"Checker for %(name)s succeeded",
327
vars(self))
328
self.checked_ok()
329
else:
330
logger.info(u"Checker for %(name)s failed",
331
vars(self))
332
else:
304
333
logger.warning(u"Checker for %(name)s crashed?",
305
334
vars(self))
306
else:
307
logger.info(u"Checker for %(name)s failed",
308
vars(self))
335
336
def checked_ok(self):
337
"""Bump up the timeout for this client.
338
339
This should only be called when the client has been seen,
340
alive and well.
341
"""
342
self.last_checked_ok = datetime.datetime.utcnow()
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = (gobject.timeout_add
345
(self.timeout_milliseconds(),
346
self.disable))
347
309
348
def start_checker(self):
310
349
"""Start a new checker subprocess if one is not running.
350
311
351
If a checker already exists, leave it running and do
312
352
nothing."""
313
353
# The reason for not killing a running checker is that if we
318
358
# checkers alone, the checker would have to take more time
319
359
# than 'timeout' for the client to be declared invalid, which
320
360
# is as it should be.
361
362
# If a checker exists, make sure it is not a zombie
363
if self.checker is not None:
364
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
365
if pid:
366
logger.warning(u"Checker was a zombie")
367
gobject.source_remove(self.checker_callback_tag)
368
self.checker_callback(pid, status,
369
self.current_checker_command)
370
# Start a new checker if needed
321
371
if self.checker is None:
322
372
try:
323
# In case check_command has exactly one % operator
324
command = self.check_command % self.host
373
# In case checker_command has exactly one % operator
374
command = self.checker_command % self.host
325
375
except TypeError:
326
376
# Escape attributes for the shell
327
escaped_attrs = dict((key, re.escape(str(val)))
377
escaped_attrs = dict((key,
378
re.escape(unicode(str(val),
379
errors=
380
u'replace')))
328
381
for key, val in
329
382
vars(self).iteritems())
330
383
try:
331
command = self.check_command % escaped_attrs
384
command = self.checker_command % escaped_attrs
332
385
except TypeError, error:
333
386
logger.error(u'Could not format string "%s":'
334
u' %s', self.check_command, error)
387
u' %s', self.checker_command, error)
335
388
return True # Try again later
389
self.current_checker_command = command
336
390
try:
337
391
logger.info(u"Starting checker %r for %s",
338
392
command, self.name)
393
# We don't need to redirect stdout and stderr, since
394
# in normal mode, that is already done by daemon(),
395
# and in debug mode we don't want to. (Stdin is
396
# always replaced by /dev/null.)
339
397
self.checker = subprocess.Popen(command,
340
398
close_fds=True,
341
shell=True, cwd="/")
342
self.checker_callback_tag = gobject.child_watch_add\
343
(self.checker.pid,
344
self.checker_callback)
345
except subprocess.OSError, error:
399
shell=True, cwd=u"/")
400
self.checker_callback_tag = (gobject.child_watch_add
401
(self.checker.pid,
402
self.checker_callback,
403
data=command))
404
# The checker may have completed before the gobject
405
# watch was added. Check for this.
406
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
407
if pid:
408
gobject.source_remove(self.checker_callback_tag)
409
self.checker_callback(pid, status, command)
410
except OSError, error:
346
411
logger.error(u"Failed to start subprocess: %s",
347
412
error)
348
413
# Re-run this periodically if run by gobject.timeout_add
349
414
return True
415
350
416
def stop_checker(self):
351
417
"""Force the checker process, if any, to stop."""
352
418
if self.checker_callback_tag:
353
419
gobject.source_remove(self.checker_callback_tag)
354
420
self.checker_callback_tag = None
355
if getattr(self, "checker", None) is None:
421
if getattr(self, u"checker", None) is None:
356
422
return
357
423
logger.debug(u"Stopping checker for %(name)s", vars(self))
358
424
try:
364
430
if error.errno != errno.ESRCH: # No such process
365
431
raise
366
432
self.checker = None
433
367
434
def still_valid(self):
368
435
"""Has the timeout not yet passed for this client?"""
369
now = datetime.datetime.now()
436
if not getattr(self, u"enabled", False):
437
return False
438
now = datetime.datetime.utcnow()
370
439
if self.last_checked_ok is None:
371
440
return now < (self.created + self.timeout)
372
441
else:
373
442
return now < (self.last_checked_ok + self.timeout)
374
443
375
444
376
def peer_certificate(session):
377
"Return the peer's OpenPGP certificate as a bytestring"
378
# If not an OpenPGP certificate...
379
if gnutls.library.functions.gnutls_certificate_type_get\
380
(session._c_object) \
381
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
382
# ...do the normal thing
383
return session.peer_certificate
384
list_size = ctypes.c_uint()
385
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
386
(session._c_object, ctypes.byref(list_size))
387
if list_size.value == 0:
388
return None
389
cert = cert_list[0]
390
return ctypes.string_at(cert.data, cert.size)
391
392
393
def fingerprint(openpgp):
394
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
395
# New GnuTLS "datum" with the OpenPGP public key
396
datum = gnutls.library.types.gnutls_datum_t\
397
(ctypes.cast(ctypes.c_char_p(openpgp),
398
ctypes.POINTER(ctypes.c_ubyte)),
399
ctypes.c_uint(len(openpgp)))
400
# New empty GnuTLS certificate
401
crt = gnutls.library.types.gnutls_openpgp_crt_t()
402
gnutls.library.functions.gnutls_openpgp_crt_init\
403
(ctypes.byref(crt))
404
# Import the OpenPGP public key into the certificate
405
gnutls.library.functions.gnutls_openpgp_crt_import\
406
(crt, ctypes.byref(datum),
407
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
408
# New buffer for the fingerprint
409
buffer = ctypes.create_string_buffer(20)
410
buffer_length = ctypes.c_size_t()
411
# Get the fingerprint from the certificate into the buffer
412
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
413
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
414
# Deinit the certificate
415
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
416
# Convert the buffer to a Python bytestring
417
fpr = ctypes.string_at(buffer, buffer_length.value)
418
# Convert the bytestring to hexadecimal notation
419
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
420
return hex_fpr
421
422
423
class tcp_handler(SocketServer.BaseRequestHandler, object):
424
"""A TCP request handler class.
425
Instantiated by IPv6_TCPServer for each request to handle it.
445
class ClientDBus(Client, dbus.service.Object):
446
"""A Client class using D-Bus
447
448
Attributes:
449
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
450
"""
451
# dbus.service.Object doesn't use super(), so we can't either.
452
453
def __init__(self, *args, **kwargs):
454
Client.__init__(self, *args, **kwargs)
455
# Only now, when this client is initialized, can it show up on
456
# the D-Bus
457
self.dbus_object_path = (dbus.ObjectPath
458
(u"/clients/"
459
+ self.name.replace(u".", u"_")))
460
dbus.service.Object.__init__(self, bus,
461
self.dbus_object_path)
462
def enable(self):
463
oldstate = getattr(self, u"enabled", False)
464
r = Client.enable(self)
465
if oldstate != self.enabled:
466
# Emit D-Bus signals
467
self.PropertyChanged(dbus.String(u"enabled"),
468
dbus.Boolean(True, variant_level=1))
469
self.PropertyChanged(dbus.String(u"last_enabled"),
470
(_datetime_to_dbus(self.last_enabled,
471
variant_level=1)))
472
return r
473
474
def disable(self, signal = True):
475
oldstate = getattr(self, u"enabled", False)
476
r = Client.disable(self)
477
if signal and oldstate != self.enabled:
478
# Emit D-Bus signal
479
self.PropertyChanged(dbus.String(u"enabled"),
480
dbus.Boolean(False, variant_level=1))
481
return r
482
483
def __del__(self, *args, **kwargs):
484
try:
485
self.remove_from_connection()
486
except LookupError:
487
pass
488
if hasattr(dbus.service.Object, u"__del__"):
489
dbus.service.Object.__del__(self, *args, **kwargs)
490
Client.__del__(self, *args, **kwargs)
491
492
def checker_callback(self, pid, condition, command,
493
*args, **kwargs):
494
self.checker_callback_tag = None
495
self.checker = None
496
# Emit D-Bus signal
497
self.PropertyChanged(dbus.String(u"checker_running"),
498
dbus.Boolean(False, variant_level=1))
499
if os.WIFEXITED(condition):
500
exitstatus = os.WEXITSTATUS(condition)
501
# Emit D-Bus signal
502
self.CheckerCompleted(dbus.Int16(exitstatus),
503
dbus.Int64(condition),
504
dbus.String(command))
505
else:
506
# Emit D-Bus signal
507
self.CheckerCompleted(dbus.Int16(-1),
508
dbus.Int64(condition),
509
dbus.String(command))
510
511
return Client.checker_callback(self, pid, condition, command,
512
*args, **kwargs)
513
514
def checked_ok(self, *args, **kwargs):
515
r = Client.checked_ok(self, *args, **kwargs)
516
# Emit D-Bus signal
517
self.PropertyChanged(
518
dbus.String(u"last_checked_ok"),
519
(_datetime_to_dbus(self.last_checked_ok,
520
variant_level=1)))
521
return r
522
523
def start_checker(self, *args, **kwargs):
524
old_checker = self.checker
525
if self.checker is not None:
526
old_checker_pid = self.checker.pid
527
else:
528
old_checker_pid = None
529
r = Client.start_checker(self, *args, **kwargs)
530
# Only if new checker process was started
531
if (self.checker is not None
532
and old_checker_pid != self.checker.pid):
533
# Emit D-Bus signal
534
self.CheckerStarted(self.current_checker_command)
535
self.PropertyChanged(
536
dbus.String(u"checker_running"),
537
dbus.Boolean(True, variant_level=1))
538
return r
539
540
def stop_checker(self, *args, **kwargs):
541
old_checker = getattr(self, u"checker", None)
542
r = Client.stop_checker(self, *args, **kwargs)
543
if (old_checker is not None
544
and getattr(self, u"checker", None) is None):
545
self.PropertyChanged(dbus.String(u"checker_running"),
546
dbus.Boolean(False, variant_level=1))
547
return r
548
549
## D-Bus methods & signals
550
_interface = u"se.bsnet.fukt.Mandos.Client"
551
552
# CheckedOK - method
553
@dbus.service.method(_interface)
554
def CheckedOK(self):
555
return self.checked_ok()
556
557
# CheckerCompleted - signal
558
@dbus.service.signal(_interface, signature=u"nxs")
559
def CheckerCompleted(self, exitcode, waitstatus, command):
560
"D-Bus signal"
561
pass
562
563
# CheckerStarted - signal
564
@dbus.service.signal(_interface, signature=u"s")
565
def CheckerStarted(self, command):
566
"D-Bus signal"
567
pass
568
569
# GetAllProperties - method
570
@dbus.service.method(_interface, out_signature=u"a{sv}")
571
def GetAllProperties(self):
572
"D-Bus method"
573
return dbus.Dictionary({
574
dbus.String(u"name"):
575
dbus.String(self.name, variant_level=1),
576
dbus.String(u"fingerprint"):
577
dbus.String(self.fingerprint, variant_level=1),
578
dbus.String(u"host"):
579
dbus.String(self.host, variant_level=1),
580
dbus.String(u"created"):
581
_datetime_to_dbus(self.created, variant_level=1),
582
dbus.String(u"last_enabled"):
583
(_datetime_to_dbus(self.last_enabled,
584
variant_level=1)
585
if self.last_enabled is not None
586
else dbus.Boolean(False, variant_level=1)),
587
dbus.String(u"enabled"):
588
dbus.Boolean(self.enabled, variant_level=1),
589
dbus.String(u"last_checked_ok"):
590
(_datetime_to_dbus(self.last_checked_ok,
591
variant_level=1)
592
if self.last_checked_ok is not None
593
else dbus.Boolean (False, variant_level=1)),
594
dbus.String(u"timeout"):
595
dbus.UInt64(self.timeout_milliseconds(),
596
variant_level=1),
597
dbus.String(u"interval"):
598
dbus.UInt64(self.interval_milliseconds(),
599
variant_level=1),
600
dbus.String(u"checker"):
601
dbus.String(self.checker_command,
602
variant_level=1),
603
dbus.String(u"checker_running"):
604
dbus.Boolean(self.checker is not None,
605
variant_level=1),
606
dbus.String(u"object_path"):
607
dbus.ObjectPath(self.dbus_object_path,
608
variant_level=1)
609
}, signature=u"sv")
610
611
# IsStillValid - method
612
@dbus.service.method(_interface, out_signature=u"b")
613
def IsStillValid(self):
614
return self.still_valid()
615
616
# PropertyChanged - signal
617
@dbus.service.signal(_interface, signature=u"sv")
618
def PropertyChanged(self, property, value):
619
"D-Bus signal"
620
pass
621
622
# ReceivedSecret - signal
623
@dbus.service.signal(_interface)
624
def ReceivedSecret(self):
625
"D-Bus signal"
626
pass
627
628
# Rejected - signal
629
@dbus.service.signal(_interface)
630
def Rejected(self):
631
"D-Bus signal"
632
pass
633
634
# SetChecker - method
635
@dbus.service.method(_interface, in_signature=u"s")
636
def SetChecker(self, checker):
637
"D-Bus setter method"
638
self.checker_command = checker
639
# Emit D-Bus signal
640
self.PropertyChanged(dbus.String(u"checker"),
641
dbus.String(self.checker_command,
642
variant_level=1))
643
644
# SetHost - method
645
@dbus.service.method(_interface, in_signature=u"s")
646
def SetHost(self, host):
647
"D-Bus setter method"
648
self.host = host
649
# Emit D-Bus signal
650
self.PropertyChanged(dbus.String(u"host"),
651
dbus.String(self.host, variant_level=1))
652
653
# SetInterval - method
654
@dbus.service.method(_interface, in_signature=u"t")
655
def SetInterval(self, milliseconds):
656
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
657
# Emit D-Bus signal
658
self.PropertyChanged(dbus.String(u"interval"),
659
(dbus.UInt64(self.interval_milliseconds(),
660
variant_level=1)))
661
662
# SetSecret - method
663
@dbus.service.method(_interface, in_signature=u"ay",
664
byte_arrays=True)
665
def SetSecret(self, secret):
666
"D-Bus setter method"
667
self.secret = str(secret)
668
669
# SetTimeout - method
670
@dbus.service.method(_interface, in_signature=u"t")
671
def SetTimeout(self, milliseconds):
672
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
673
# Emit D-Bus signal
674
self.PropertyChanged(dbus.String(u"timeout"),
675
(dbus.UInt64(self.timeout_milliseconds(),
676
variant_level=1)))
677
678
# Enable - method
679
@dbus.service.method(_interface)
680
def Enable(self):
681
"D-Bus method"
682
self.enable()
683
684
# StartChecker - method
685
@dbus.service.method(_interface)
686
def StartChecker(self):
687
"D-Bus method"
688
self.start_checker()
689
690
# Disable - method
691
@dbus.service.method(_interface)
692
def Disable(self):
693
"D-Bus method"
694
self.disable()
695
696
# StopChecker - method
697
@dbus.service.method(_interface)
698
def StopChecker(self):
699
self.stop_checker()
700
701
del _interface
702
703
704
class ClientHandler(socketserver.BaseRequestHandler, object):
705
"""A class to handle client connections.
706
707
Instantiated once for each connection to handle it.
426
708
Note: This will run in its own forked process."""
427
709
428
710
def handle(self):
429
711
logger.info(u"TCP connection from: %s",
430
unicode(self.client_address))
431
session = gnutls.connection.ClientSession\
432
(self.request, gnutls.connection.X509Credentials())
433
434
line = self.request.makefile().readline()
435
logger.debug(u"Protocol version: %r", line)
436
try:
437
if int(line.strip().split()[0]) > 1:
438
raise RuntimeError
439
except (ValueError, IndexError, RuntimeError), error:
440
logger.error(u"Unknown protocol version: %s", error)
441
return
442
443
# Note: gnutls.connection.X509Credentials is really a generic
444
# GnuTLS certificate credentials object so long as no X.509
445
# keys are added to it. Therefore, we can use it here despite
446
# using OpenPGP certificates.
447
448
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
449
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
450
# "+DHE-DSS"))
451
priority = "NORMAL" # Fallback default, since this
452
# MUST be set.
453
if self.server.settings["priority"]:
454
priority = self.server.settings["priority"]
455
gnutls.library.functions.gnutls_priority_set_direct\
456
(session._c_object, priority, None);
457
458
try:
459
session.handshake()
460
except gnutls.errors.GNUTLSError, error:
461
logger.warning(u"Handshake failed: %s", error)
462
# Do not run session.bye() here: the session is not
463
# established. Just abandon the request.
464
return
465
try:
466
fpr = fingerprint(peer_certificate(session))
467
except (TypeError, gnutls.errors.GNUTLSError), error:
468
logger.warning(u"Bad certificate: %s", error)
469
session.bye()
470
return
471
logger.debug(u"Fingerprint: %s", fpr)
472
client = None
473
for c in self.server.clients:
474
if c.fingerprint == fpr:
475
client = c
476
break
477
if not client:
478
logger.warning(u"Client not found for fingerprint: %s",
479
fpr)
480
session.bye()
481
return
482
# Have to check if client.still_valid(), since it is possible
483
# that the client timed out while establishing the GnuTLS
484
# session.
485
if not client.still_valid():
486
logger.warning(u"Client %(name)s is invalid",
487
vars(client))
488
session.bye()
489
return
490
sent_size = 0
491
while sent_size < len(client.secret):
492
sent = session.send(client.secret[sent_size:])
493
logger.debug(u"Sent: %d, remaining: %d",
494
sent, len(client.secret)
495
- (sent_size + sent))
496
sent_size += sent
497
session.bye()
498
499
500
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
501
"""IPv6 TCP server. Accepts 'None' as address and/or port.
712
unicode(self.client_address))
713
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
714
# Open IPC pipe to parent process
715
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
716
session = (gnutls.connection
717
.ClientSession(self.request,
718
gnutls.connection
719
.X509Credentials()))
720
721
line = self.request.makefile().readline()
722
logger.debug(u"Protocol version: %r", line)
723
try:
724
if int(line.strip().split()[0]) > 1:
725
raise RuntimeError
726
except (ValueError, IndexError, RuntimeError), error:
727
logger.error(u"Unknown protocol version: %s", error)
728
return
729
730
# Note: gnutls.connection.X509Credentials is really a
731
# generic GnuTLS certificate credentials object so long as
732
# no X.509 keys are added to it. Therefore, we can use it
733
# here despite using OpenPGP certificates.
734
735
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
736
# u"+AES-256-CBC", u"+SHA1",
737
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
738
# u"+DHE-DSS"))
739
# Use a fallback default, since this MUST be set.
740
priority = self.server.gnutls_priority
741
if priority is None:
742
priority = u"NORMAL"
743
(gnutls.library.functions
744
.gnutls_priority_set_direct(session._c_object,
745
priority, None))
746
747
try:
748
session.handshake()
749
except gnutls.errors.GNUTLSError, error:
750
logger.warning(u"Handshake failed: %s", error)
751
# Do not run session.bye() here: the session is not
752
# established. Just abandon the request.
753
return
754
logger.debug(u"Handshake succeeded")
755
try:
756
fpr = self.fingerprint(self.peer_certificate(session))
757
except (TypeError, gnutls.errors.GNUTLSError), error:
758
logger.warning(u"Bad certificate: %s", error)
759
session.bye()
760
return
761
logger.debug(u"Fingerprint: %s", fpr)
762
763
for c in self.server.clients:
764
if c.fingerprint == fpr:
765
client = c
766
break
767
else:
768
ipc.write(u"NOTFOUND %s\n" % fpr)
769
session.bye()
770
return
771
# Have to check if client.still_valid(), since it is
772
# possible that the client timed out while establishing
773
# the GnuTLS session.
774
if not client.still_valid():
775
ipc.write(u"INVALID %s\n" % client.name)
776
session.bye()
777
return
778
ipc.write(u"SENDING %s\n" % client.name)
779
sent_size = 0
780
while sent_size < len(client.secret):
781
sent = session.send(client.secret[sent_size:])
782
logger.debug(u"Sent: %d, remaining: %d",
783
sent, len(client.secret)
784
- (sent_size + sent))
785
sent_size += sent
786
session.bye()
787
788
@staticmethod
789
def peer_certificate(session):
790
"Return the peer's OpenPGP certificate as a bytestring"
791
# If not an OpenPGP certificate...
792
if (gnutls.library.functions
793
.gnutls_certificate_type_get(session._c_object)
794
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
795
# ...do the normal thing
796
return session.peer_certificate
797
list_size = ctypes.c_uint(1)
798
cert_list = (gnutls.library.functions
799
.gnutls_certificate_get_peers
800
(session._c_object, ctypes.byref(list_size)))
801
if not bool(cert_list) and list_size.value != 0:
802
raise gnutls.errors.GNUTLSError(u"error getting peer"
803
u" certificate")
804
if list_size.value == 0:
805
return None
806
cert = cert_list[0]
807
return ctypes.string_at(cert.data, cert.size)
808
809
@staticmethod
810
def fingerprint(openpgp):
811
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
812
# New GnuTLS "datum" with the OpenPGP public key
813
datum = (gnutls.library.types
814
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
815
ctypes.POINTER
816
(ctypes.c_ubyte)),
817
ctypes.c_uint(len(openpgp))))
818
# New empty GnuTLS certificate
819
crt = gnutls.library.types.gnutls_openpgp_crt_t()
820
(gnutls.library.functions
821
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
822
# Import the OpenPGP public key into the certificate
823
(gnutls.library.functions
824
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
825
gnutls.library.constants
826
.GNUTLS_OPENPGP_FMT_RAW))
827
# Verify the self signature in the key
828
crtverify = ctypes.c_uint()
829
(gnutls.library.functions
830
.gnutls_openpgp_crt_verify_self(crt, 0,
831
ctypes.byref(crtverify)))
832
if crtverify.value != 0:
833
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
834
raise (gnutls.errors.CertificateSecurityError
835
(u"Verify failed"))
836
# New buffer for the fingerprint
837
buf = ctypes.create_string_buffer(20)
838
buf_len = ctypes.c_size_t()
839
# Get the fingerprint from the certificate into the buffer
840
(gnutls.library.functions
841
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
842
ctypes.byref(buf_len)))
843
# Deinit the certificate
844
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
845
# Convert the buffer to a Python bytestring
846
fpr = ctypes.string_at(buf, buf_len.value)
847
# Convert the bytestring to hexadecimal notation
848
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
849
return hex_fpr
850
851
852
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
853
"""Like socketserver.ForkingMixIn, but also pass a pipe.
854
855
Assumes a gobject.MainLoop event loop.
856
"""
857
def process_request(self, request, client_address):
858
"""Overrides and wraps the original process_request().
859
860
This function creates a new pipe in self.pipe
861
"""
862
self.pipe = os.pipe()
863
super(ForkingMixInWithPipe,
864
self).process_request(request, client_address)
865
os.close(self.pipe[1]) # close write end
866
# Call "handle_ipc" for both data and EOF events
867
gobject.io_add_watch(self.pipe[0],
868
gobject.IO_IN | gobject.IO_HUP,
869
self.handle_ipc)
870
def handle_ipc(source, condition):
871
"""Dummy function; override as necessary"""
872
os.close(source)
873
return False
874
875
876
class IPv6_TCPServer(ForkingMixInWithPipe,
877
socketserver.TCPServer, object):
878
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
879
502
880
Attributes:
503
settings: Server settings
504
clients: Set() of Client objects
881
enabled: Boolean; whether this server is activated yet
882
interface: None or a network interface name (string)
883
use_ipv6: Boolean; to use IPv6 or not
884
----
885
clients: set of Client objects
886
gnutls_priority GnuTLS priority string
887
use_dbus: Boolean; to emit D-Bus signals or not
505
888
"""
506
address_family = socket.AF_INET6
507
def __init__(self, *args, **kwargs):
508
if "settings" in kwargs:
509
self.settings = kwargs["settings"]
510
del kwargs["settings"]
511
if "clients" in kwargs:
512
self.clients = kwargs["clients"]
513
del kwargs["clients"]
514
return super(type(self), self).__init__(*args, **kwargs)
889
def __init__(self, server_address, RequestHandlerClass,
890
interface=None, use_ipv6=True, clients=None,
891
gnutls_priority=None, use_dbus=True):
892
self.enabled = False
893
self.interface = interface
894
if use_ipv6:
895
self.address_family = socket.AF_INET6
896
self.clients = clients
897
self.use_dbus = use_dbus
898
self.gnutls_priority = gnutls_priority
899
socketserver.TCPServer.__init__(self, server_address,
900
RequestHandlerClass)
515
901
def server_bind(self):
516
902
"""This overrides the normal server_bind() function
517
903
to bind to an interface if one was specified, and also NOT to
518
904
bind to an address or port if they were not specified."""
519
if self.settings["interface"]:
520
# 25 is from /usr/include/asm-i486/socket.h
521
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
905
if self.interface is not None:
522
906
try:
523
907
self.socket.setsockopt(socket.SOL_SOCKET,
524
908
SO_BINDTODEVICE,
525
self.settings["interface"])
909
str(self.interface + u'\0'))
526
910
except socket.error, error:
527
911
if error[0] == errno.EPERM:
528
912
logger.error(u"No permission to"
529
913
u" bind to interface %s",
530
self.settings["interface"])
914
self.interface)
531
915
else:
532
raise error
916
raise
533
917
# Only bind(2) the socket if we really need to.
534
918
if self.server_address[0] or self.server_address[1]:
535
919
if not self.server_address[0]:
536
in6addr_any = "::"
537
self.server_address = (in6addr_any,
920
if self.address_family == socket.AF_INET6:
921
any_address = u"::" # in6addr_any
922
else:
923
any_address = socket.INADDR_ANY
924
self.server_address = (any_address,
538
925
self.server_address[1])
539
926
elif not self.server_address[1]:
540
927
self.server_address = (self.server_address[0],
541
928
0)
542
# if self.settings["interface"]:
929
# if self.interface:
543
930
# self.server_address = (self.server_address[0],
544
931
# 0, # port
545
932
# 0, # flowinfo
546
933
# if_nametoindex
547
# (self.settings
548
# ["interface"]))
549
return super(type(self), self).server_bind()
934
# (self.interface))
935
return socketserver.TCPServer.server_bind(self)
936
def server_activate(self):
937
if self.enabled:
938
return socketserver.TCPServer.server_activate(self)
939
def enable(self):
940
self.enabled = True
941
def handle_ipc(self, source, condition, file_objects={}):
942
condition_names = {
943
gobject.IO_IN: u"IN", # There is data to read.
944
gobject.IO_OUT: u"OUT", # Data can be written (without
945
# blocking).
946
gobject.IO_PRI: u"PRI", # There is urgent data to read.
947
gobject.IO_ERR: u"ERR", # Error condition.
948
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
949
# broken, usually for pipes and
950
# sockets).
951
}
952
conditions_string = ' | '.join(name
953
for cond, name in
954
condition_names.iteritems()
955
if cond & condition)
956
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
957
conditions_string)
958
959
# Turn the pipe file descriptor into a Python file object
960
if source not in file_objects:
961
file_objects[source] = os.fdopen(source, u"r", 1)
962
963
# Read a line from the file object
964
cmdline = file_objects[source].readline()
965
if not cmdline: # Empty line means end of file
966
# close the IPC pipe
967
file_objects[source].close()
968
del file_objects[source]
969
970
# Stop calling this function
971
return False
972
973
logger.debug(u"IPC command: %r", cmdline)
974
975
# Parse and act on command
976
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
977
978
if cmd == u"NOTFOUND":
979
logger.warning(u"Client not found for fingerprint: %s",
980
args)
981
if self.use_dbus:
982
# Emit D-Bus signal
983
mandos_dbus_service.ClientNotFound(args)
984
elif cmd == u"INVALID":
985
for client in self.clients:
986
if client.name == args:
987
logger.warning(u"Client %s is invalid", args)
988
if self.use_dbus:
989
# Emit D-Bus signal
990
client.Rejected()
991
break
992
else:
993
logger.error(u"Unknown client %s is invalid", args)
994
elif cmd == u"SENDING":
995
for client in self.clients:
996
if client.name == args:
997
logger.info(u"Sending secret to %s", client.name)
998
client.checked_ok()
999
if self.use_dbus:
1000
# Emit D-Bus signal
1001
client.ReceivedSecret()
1002
break
1003
else:
1004
logger.error(u"Sending secret to unknown client %s",
1005
args)
1006
else:
1007
logger.error(u"Unknown IPC command: %r", cmdline)
1008
1009
# Keep calling this function
1010
return True
550
1011
551
1012
552
1013
def string_to_delta(interval):
553
1014
"""Parse a string and return a datetime.timedelta
554
555
>>> string_to_delta('7d')
1015
1016
>>> string_to_delta(u'7d')
556
1017
datetime.timedelta(7)
557
>>> string_to_delta('60s')
1018
>>> string_to_delta(u'60s')
558
1019
datetime.timedelta(0, 60)
559
>>> string_to_delta('60m')
1020
>>> string_to_delta(u'60m')
560
1021
datetime.timedelta(0, 3600)
561
>>> string_to_delta('24h')
1022
>>> string_to_delta(u'24h')
562
1023
datetime.timedelta(1)
563
1024
>>> string_to_delta(u'1w')
564
1025
datetime.timedelta(7)
1026
>>> string_to_delta(u'5m 30s')
1027
datetime.timedelta(0, 330)
565
1028
"""
566
try:
567
suffix=unicode(interval[-1])
568
value=int(interval[:-1])
569
if suffix == u"d":
570
delta = datetime.timedelta(value)
571
elif suffix == u"s":
572
delta = datetime.timedelta(0, value)
573
elif suffix == u"m":
574
delta = datetime.timedelta(0, 0, 0, 0, value)
575
elif suffix == u"h":
576
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
577
elif suffix == u"w":
578
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
579
else:
1029
timevalue = datetime.timedelta(0)
1030
for s in interval.split():
1031
try:
1032
suffix = unicode(s[-1])
1033
value = int(s[:-1])
1034
if suffix == u"d":
1035
delta = datetime.timedelta(value)
1036
elif suffix == u"s":
1037
delta = datetime.timedelta(0, value)
1038
elif suffix == u"m":
1039
delta = datetime.timedelta(0, 0, 0, 0, value)
1040
elif suffix == u"h":
1041
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1042
elif suffix == u"w":
1043
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1044
else:
1045
raise ValueError
1046
except (ValueError, IndexError):
580
1047
raise ValueError
581
except (ValueError, IndexError):
582
raise ValueError
583
return delta
1048
timevalue += delta
1049
return timevalue
584
1050
585
1051
586
1052
def server_state_changed(state):
587
1053
"""Derived from the Avahi example code"""
588
1054
if state == avahi.SERVER_COLLISION:
589
logger.error(u"Server name collision")
1055
logger.error(u"Zeroconf server name collision")
590
1056
service.remove()
591
1057
elif state == avahi.SERVER_RUNNING:
592
1058
service.add()
594
1060
595
1061
def entry_group_state_changed(state, error):
596
1062
"""Derived from the Avahi example code"""
597
logger.debug(u"state change: %i", state)
1063
logger.debug(u"Avahi state change: %i", state)
598
1064
599
1065
if state == avahi.ENTRY_GROUP_ESTABLISHED:
600
logger.debug(u"Service established.")
1066
logger.debug(u"Zeroconf service established.")
601
1067
elif state == avahi.ENTRY_GROUP_COLLISION:
602
logger.warning(u"Service name collision.")
1068
logger.warning(u"Zeroconf service name collision.")
603
1069
service.rename()
604
1070
elif state == avahi.ENTRY_GROUP_FAILURE:
605
logger.critical(u"Error in group state changed %s",
1071
logger.critical(u"Avahi: Error in group state changed %s",
606
1072
unicode(error))
607
raise AvahiGroupError("State changed: %s", str(error))
1073
raise AvahiGroupError(u"State changed: %s" % unicode(error))
608
1074
609
1075
def if_nametoindex(interface):
610
"""Call the C function if_nametoindex(), or equivalent"""
1076
"""Call the C function if_nametoindex(), or equivalent
1077
1078
Note: This function cannot accept a unicode string."""
611
1079
global if_nametoindex
612
1080
try:
613
if "ctypes.util" not in sys.modules:
614
import ctypes.util
615
if_nametoindex = ctypes.cdll.LoadLibrary\
616
(ctypes.util.find_library("c")).if_nametoindex
1081
if_nametoindex = (ctypes.cdll.LoadLibrary
1082
(ctypes.util.find_library(u"c"))
1083
.if_nametoindex)
617
1084
except (OSError, AttributeError):
618
if "struct" not in sys.modules:
619
import struct
620
if "fcntl" not in sys.modules:
621
import fcntl
1085
logger.warning(u"Doing if_nametoindex the hard way")
622
1086
def if_nametoindex(interface):
623
1087
"Get an interface index the hard way, i.e. using fcntl()"
624
1088
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
625
s = socket.socket()
626
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
627
struct.pack("16s16x", interface))
628
s.close()
629
interface_index = struct.unpack("I", ifreq[16:20])[0]
1089
with closing(socket.socket()) as s:
1090
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1091
struct.pack(str(u"16s16x"),
1092
interface))
1093
interface_index = struct.unpack(str(u"I"),
1094
ifreq[16:20])[0]
630
1095
return interface_index
631
1096
return if_nametoindex(interface)
632
1097
633
1098
634
1099
def daemon(nochdir = False, noclose = False):
635
1100
"""See daemon(3). Standard BSD Unix function.
1101
636
1102
This should really exist as os.daemon, but it doesn't (yet)."""
637
1103
if os.fork():
638
1104
sys.exit()
639
1105
os.setsid()
640
1106
if not nochdir:
641
os.chdir("/")
1107
os.chdir(u"/")
642
1108
if os.fork():
643
1109
sys.exit()
644
1110
if not noclose:
646
1112
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
647
1113
if not stat.S_ISCHR(os.fstat(null).st_mode):
648
1114
raise OSError(errno.ENODEV,
649
"/dev/null not a character device")
1115
u"/dev/null not a character device")
650
1116
os.dup2(null, sys.stdin.fileno())
651
1117
os.dup2(null, sys.stdout.fileno())
652
1118
os.dup2(null, sys.stderr.fileno())
655
1121
656
1122
657
1123
def main():
658
global main_loop_started
659
main_loop_started = False
660
661
parser = OptionParser(version = "%%prog %s" % version)
662
parser.add_option("-i", "--interface", type="string",
663
metavar="IF", help="Bind to interface IF")
664
parser.add_option("-a", "--address", type="string",
665
help="Address to listen for requests on")
666
parser.add_option("-p", "--port", type="int",
667
help="Port number to receive requests on")
668
parser.add_option("--check", action="store_true", default=False,
669
help="Run self-test")
670
parser.add_option("--debug", action="store_true",
671
help="Debug mode; run in foreground and log to"
672
" terminal")
673
parser.add_option("--priority", type="string", help="GnuTLS"
674
" priority string (see GnuTLS documentation)")
675
parser.add_option("--servicename", type="string", metavar="NAME",
676
help="Zeroconf service name")
677
parser.add_option("--configdir", type="string",
678
default="/etc/mandos", metavar="DIR",
679
help="Directory to search for configuration"
680
" files")
681
(options, args) = parser.parse_args()
1124
1125
######################################################################
1126
# Parsing of options, both command line and config file
1127
1128
parser = optparse.OptionParser(version = "%%prog %s" % version)
1129
parser.add_option("-i", u"--interface", type=u"string",
1130
metavar="IF", help=u"Bind to interface IF")
1131
parser.add_option("-a", u"--address", type=u"string",
1132
help=u"Address to listen for requests on")
1133
parser.add_option("-p", u"--port", type=u"int",
1134
help=u"Port number to receive requests on")
1135
parser.add_option("--check", action=u"store_true",
1136
help=u"Run self-test")
1137
parser.add_option("--debug", action=u"store_true",
1138
help=u"Debug mode; run in foreground and log to"
1139
u" terminal")
1140
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1141
u" priority string (see GnuTLS documentation)")
1142
parser.add_option("--servicename", type=u"string",
1143
metavar=u"NAME", help=u"Zeroconf service name")
1144
parser.add_option("--configdir", type=u"string",
1145
default=u"/etc/mandos", metavar=u"DIR",
1146
help=u"Directory to search for configuration"
1147
u" files")
1148
parser.add_option("--no-dbus", action=u"store_false",
1149
dest=u"use_dbus", help=u"Do not provide D-Bus"
1150
u" system bus interface")
1151
parser.add_option("--no-ipv6", action=u"store_false",
1152
dest=u"use_ipv6", help=u"Do not use IPv6")
1153
options = parser.parse_args()[0]
682
1154
683
1155
if options.check:
684
1156
import doctest
686
1158
sys.exit()
687
1159
688
1160
# Default values for config file for server-global settings
689
server_defaults = { "interface": "",
690
"address": "",
691
"port": "",
692
"debug": "False",
693
"priority":
694
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
695
"servicename": "Mandos",
1161
server_defaults = { u"interface": u"",
1162
u"address": u"",
1163
u"port": u"",
1164
u"debug": u"False",
1165
u"priority":
1166
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1167
u"servicename": u"Mandos",
1168
u"use_dbus": u"True",
1169
u"use_ipv6": u"True",
696
1170
}
697
1171
698
1172
# Parse config file for server-global settings
699
server_config = ConfigParser.SafeConfigParser(server_defaults)
1173
server_config = configparser.SafeConfigParser(server_defaults)
700
1174
del server_defaults
701
server_config.read(os.path.join(options.configdir, "mandos.conf"))
702
server_section = "server"
1175
server_config.read(os.path.join(options.configdir,
1176
u"mandos.conf"))
703
1177
# Convert the SafeConfigParser object to a dict
704
server_settings = dict(server_config.items(server_section))
705
# Use getboolean on the boolean config option
706
server_settings["debug"] = server_config.getboolean\
707
(server_section, "debug")
1178
server_settings = server_config.defaults()
1179
# Use the appropriate methods on the non-string config options
1180
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1181
server_settings[option] = server_config.getboolean(u"DEFAULT",
1182
option)
1183
if server_settings["port"]:
1184
server_settings["port"] = server_config.getint(u"DEFAULT",
1185
u"port")
708
1186
del server_config
709
1187
710
1188
# Override the settings from the config file with command line
711
1189
# options, if set.
712
for option in ("interface", "address", "port", "debug",
713
"priority", "servicename", "configdir"):
1190
for option in (u"interface", u"address", u"port", u"debug",
1191
u"priority", u"servicename", u"configdir",
1192
u"use_dbus", u"use_ipv6"):
714
1193
value = getattr(options, option)
715
1194
if value is not None:
716
1195
server_settings[option] = value
717
1196
del options
1197
# Force all strings to be unicode
1198
for option in server_settings.keys():
1199
if type(server_settings[option]) is str:
1200
server_settings[option] = unicode(server_settings[option])
718
1201
# Now we have our good server settings in "server_settings"
719
1202
720
debug = server_settings["debug"]
1203
##################################################################
1204
1205
# For convenience
1206
debug = server_settings[u"debug"]
1207
use_dbus = server_settings[u"use_dbus"]
1208
use_ipv6 = server_settings[u"use_ipv6"]
721
1209
722
1210
if not debug:
723
1211
syslogger.setLevel(logging.WARNING)
724
1212
console.setLevel(logging.WARNING)
725
1213
726
if server_settings["servicename"] != "Mandos":
727
syslogger.setFormatter(logging.Formatter\
728
('Mandos (%s): %%(levelname)s:'
729
' %%(message)s'
730
% server_settings["servicename"]))
1214
if server_settings[u"servicename"] != u"Mandos":
1215
syslogger.setFormatter(logging.Formatter
1216
(u'Mandos (%s) [%%(process)d]:'
1217
u' %%(levelname)s: %%(message)s'
1218
% server_settings[u"servicename"]))
731
1219
732
1220
# Parse config file with clients
733
client_defaults = { "timeout": "1h",
734
"interval": "5m",
735
"checker": "fping -q -- %%(host)s",
1221
client_defaults = { u"timeout": u"1h",
1222
u"interval": u"5m",
1223
u"checker": u"fping -q -- %%(host)s",
1224
u"host": u"",
736
1225
}
737
client_config = ConfigParser.SafeConfigParser(client_defaults)
738
client_config.read(os.path.join(server_settings["configdir"],
739
"clients.conf"))
1226
client_config = configparser.SafeConfigParser(client_defaults)
1227
client_config.read(os.path.join(server_settings[u"configdir"],
1228
u"clients.conf"))
1229
1230
global mandos_dbus_service
1231
mandos_dbus_service = None
1232
1233
clients = set()
1234
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1235
server_settings[u"port"]),
1236
ClientHandler,
1237
interface=
1238
server_settings[u"interface"],
1239
use_ipv6=use_ipv6,
1240
clients=clients,
1241
gnutls_priority=
1242
server_settings[u"priority"],
1243
use_dbus=use_dbus)
1244
pidfilename = u"/var/run/mandos.pid"
1245
try:
1246
pidfile = open(pidfilename, u"w")
1247
except IOError:
1248
logger.error(u"Could not open file %r", pidfilename)
1249
1250
try:
1251
uid = pwd.getpwnam(u"_mandos").pw_uid
1252
gid = pwd.getpwnam(u"_mandos").pw_gid
1253
except KeyError:
1254
try:
1255
uid = pwd.getpwnam(u"mandos").pw_uid
1256
gid = pwd.getpwnam(u"mandos").pw_gid
1257
except KeyError:
1258
try:
1259
uid = pwd.getpwnam(u"nobody").pw_uid
1260
gid = pwd.getpwnam(u"nobody").pw_gid
1261
except KeyError:
1262
uid = 65534
1263
gid = 65534
1264
try:
1265
os.setgid(gid)
1266
os.setuid(uid)
1267
except OSError, error:
1268
if error[0] != errno.EPERM:
1269
raise error
1270
1271
# Enable all possible GnuTLS debugging
1272
if debug:
1273
# "Use a log level over 10 to enable all debugging options."
1274
# - GnuTLS manual
1275
gnutls.library.functions.gnutls_global_set_log_level(11)
1276
1277
@gnutls.library.types.gnutls_log_func
1278
def debug_gnutls(level, string):
1279
logger.debug(u"GnuTLS: %s", string[:-1])
1280
1281
(gnutls.library.functions
1282
.gnutls_global_set_log_function(debug_gnutls))
740
1283
741
1284
global service
742
service = AvahiService(name = server_settings["servicename"],
743
type = "_mandos._tcp", );
1285
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1286
service = AvahiService(name = server_settings[u"servicename"],
1287
servicetype = u"_mandos._tcp",
1288
protocol = protocol)
744
1289
if server_settings["interface"]:
745
service.interface = if_nametoindex(server_settings["interface"])
1290
service.interface = (if_nametoindex
1291
(str(server_settings[u"interface"])))
746
1292
747
1293
global main_loop
748
1294
global bus
751
1297
DBusGMainLoop(set_as_default=True )
752
1298
main_loop = gobject.MainLoop()
753
1299
bus = dbus.SystemBus()
754
server = dbus.Interface(
755
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
avahi.DBUS_INTERFACE_SERVER )
1300
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1301
avahi.DBUS_PATH_SERVER),
1302
avahi.DBUS_INTERFACE_SERVER)
757
1303
# End of Avahi example code
758
759
clients = Set()
760
def remove_from_clients(client):
761
clients.remove(client)
762
if not clients:
763
logger.critical(u"No clients left, exiting")
764
sys.exit()
765
766
clients.update(Set(Client(name = section,
767
stop_hook = remove_from_clients,
768
config
769
= dict(client_config.items(section)))
770
for section in client_config.sections()))
1304
if use_dbus:
1305
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1306
1307
client_class = Client
1308
if use_dbus:
1309
client_class = ClientDBus
1310
clients.update(set(
1311
client_class(name = section,
1312
config= dict(client_config.items(section)))
1313
for section in client_config.sections()))
771
1314
if not clients:
772
logger.critical(u"No clients defined")
773
sys.exit(1)
1315
logger.warning(u"No clients defined")
774
1316
775
if not debug:
1317
if debug:
1318
# Redirect stdin so all checkers get /dev/null
1319
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1320
os.dup2(null, sys.stdin.fileno())
1321
if null > 2:
1322
os.close(null)
1323
else:
1324
# No console logging
776
1325
logger.removeHandler(console)
1326
# Close all input and output, do double fork, etc.
777
1327
daemon()
778
1328
779
pidfilename = "/var/run/mandos/mandos.pid"
780
pid = os.getpid()
781
1329
try:
782
pidfile = open(pidfilename, "w")
783
pidfile.write(str(pid) + "\n")
784
pidfile.close()
1330
with closing(pidfile):
1331
pid = os.getpid()
1332
pidfile.write(str(pid) + "\n")
785
1333
del pidfile
786
except IOError, err:
787
logger.error(u"Could not write %s file with PID %d",
788
pidfilename, os.getpid())
1334
except IOError:
1335
logger.error(u"Could not write to file %r with PID %d",
1336
pidfilename, pid)
1337
except NameError:
1338
# "pidfile" was never created
1339
pass
1340
del pidfilename
789
1341
790
1342
def cleanup():
791
1343
"Cleanup function; run on exit"
798
1350
799
1351
while clients:
800
1352
client = clients.pop()
801
client.stop_hook = None
802
client.stop()
1353
client.disable_hook = None
1354
client.disable()
803
1355
804
1356
atexit.register(cleanup)
805
1357
808
1360
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
809
1361
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
810
1362
1363
if use_dbus:
1364
class MandosDBusService(dbus.service.Object):
1365
"""A D-Bus proxy object"""
1366
def __init__(self):
1367
dbus.service.Object.__init__(self, bus, u"/")
1368
_interface = u"se.bsnet.fukt.Mandos"
1369
1370
@dbus.service.signal(_interface, signature=u"oa{sv}")
1371
def ClientAdded(self, objpath, properties):
1372
"D-Bus signal"
1373
pass
1374
1375
@dbus.service.signal(_interface, signature=u"s")
1376
def ClientNotFound(self, fingerprint):
1377
"D-Bus signal"
1378
pass
1379
1380
@dbus.service.signal(_interface, signature=u"os")
1381
def ClientRemoved(self, objpath, name):
1382
"D-Bus signal"
1383
pass
1384
1385
@dbus.service.method(_interface, out_signature=u"ao")
1386
def GetAllClients(self):
1387
"D-Bus method"
1388
return dbus.Array(c.dbus_object_path for c in clients)
1389
1390
@dbus.service.method(_interface,
1391
out_signature=u"a{oa{sv}}")
1392
def GetAllClientsWithProperties(self):
1393
"D-Bus method"
1394
return dbus.Dictionary(
1395
((c.dbus_object_path, c.GetAllProperties())
1396
for c in clients),
1397
signature=u"oa{sv}")
1398
1399
@dbus.service.method(_interface, in_signature=u"o")
1400
def RemoveClient(self, object_path):
1401
"D-Bus method"
1402
for c in clients:
1403
if c.dbus_object_path == object_path:
1404
clients.remove(c)
1405
c.remove_from_connection()
1406
# Don't signal anything except ClientRemoved
1407
c.disable(signal=False)
1408
# Emit D-Bus signal
1409
self.ClientRemoved(object_path, c.name)
1410
return
1411
raise KeyError
1412
1413
del _interface
1414
1415
mandos_dbus_service = MandosDBusService()
1416
811
1417
for client in clients:
812
client.start()
813
814
tcp_server = IPv6_TCPServer((server_settings["address"],
815
server_settings["port"]),
816
tcp_handler,
817
settings=server_settings,
818
clients=clients)
1418
if use_dbus:
1419
# Emit D-Bus signal
1420
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1421
client.GetAllProperties())
1422
client.enable()
1423
1424
tcp_server.enable()
1425
tcp_server.server_activate()
1426
819
1427
# Find out what port we got
820
1428
service.port = tcp_server.socket.getsockname()[1]
821
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
822
u" scope_id %d" % tcp_server.socket.getsockname())
1429
if use_ipv6:
1430
logger.info(u"Now listening on address %r, port %d,"
1431
" flowinfo %d, scope_id %d"
1432
% tcp_server.socket.getsockname())
1433
else: # IPv4
1434
logger.info(u"Now listening on address %r, port %d"
1435
% tcp_server.socket.getsockname())
823
1436
824
1437
#service.interface = tcp_server.socket.getsockname()[3]
825
1438
826
1439
try:
827
1440
# From the Avahi example code
828
server.connect_to_signal("StateChanged", server_state_changed)
1441
server.connect_to_signal(u"StateChanged", server_state_changed)
829
1442
try:
830
1443
server_state_changed(server.GetState())
831
1444
except dbus.exceptions.DBusException, error:
835
1448
836
1449
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
837
1450
lambda *args, **kwargs:
838
tcp_server.handle_request\
839
(*args[2:], **kwargs) or True)
1451
(tcp_server.handle_request
1452
(*args[2:], **kwargs) or True))
840
1453
841
1454
logger.debug(u"Starting main loop")
842
main_loop_started = True
843
1455
main_loop.run()
844
1456
except AvahiError, error:
845
logger.critical(u"AvahiError: %s" + unicode(error))
1457
logger.critical(u"AvahiError: %s", error)
846
1458
sys.exit(1)
847
1459
except KeyboardInterrupt:
848
1460
if debug:
849
print
1461
print >> sys.stderr
1462
logger.debug(u"Server received KeyboardInterrupt")
1463
logger.debug(u"Server exiting")
850
1464
851
1465
if __name__ == '__main__':
852
1466
main()
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Version: 2.0.2.dev0