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- Committer: Teddy Hogeborn
- Date: 2008-07-22 06:25:35 UTC
- mfrom: (24.1.2 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080722062535-whz5do0b3dzw6m08
Merge.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
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
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# methods "add" and "remove" in the "AvahiService" class, the
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# "server_state_changed" and "entry_group_state_changed" functions,
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# and some lines in "main".
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# following functions: "add_service", "remove_service",
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# "server_state_changed", "entry_group_state_changed", and some lines
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# in "main".
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12
#
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
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# 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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25
#
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26
# You should have received a copy of the GNU General Public License
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@fukt.bsnet.se>.
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# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
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31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
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import SocketServer
37
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import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
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import datetime
40
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import errno
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import gnutls.crypto
55
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import stat
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import logging
57
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import logging.handlers
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import pwd
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from contextlib import closing
60
58
61
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import dbus
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import dbus.service
63
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import gobject
64
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import avahi
65
62
from dbus.mainloop.glib import DBusGMainLoop
66
63
import ctypes
67
import ctypes.util
68
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version = "1.0.6"
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# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
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# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
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logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
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logger.addHandler(console)
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85
class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
87
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
91
92
class AvahiServiceError(AvahiError):
93
pass
94
95
class AvahiGroupError(AvahiError):
96
pass
97
98
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class AvahiService(object):
100
"""An Avahi (Zeroconf) service.
101
Attributes:
102
interface: integer; avahi.IF_UNSPEC or an interface index.
103
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
108
TXT: list of strings; TXT record for the service
109
domain: string; Domain to publish on, default to .local if empty.
110
host: string; Host to publish records for, default is localhost
111
max_renames: integer; maximum number of renames
112
rename_count: integer; counter so we only rename after collisions
113
a sensible number of times
114
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
119
self.interface = interface
120
self.name = name
121
self.type = servicetype
122
self.port = port
123
self.TXT = TXT if TXT is not None else []
124
self.domain = domain
125
self.host = host
126
self.rename_count = 0
127
self.max_renames = max_renames
128
self.protocol = protocol
129
def rename(self):
130
"""Derived from the Avahi example code"""
131
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
134
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
142
self.remove()
143
self.add()
144
self.rename_count += 1
145
def remove(self):
146
"""Derived from the Avahi example code"""
147
if group is not None:
148
group.Reset()
149
def add(self):
150
"""Derived from the Avahi example code"""
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
83
del syslogger
84
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
171
89
# From the Avahi example code:
172
group = None # our entry group
90
serviceName = None
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
173
99
# End of Avahi example code
174
100
175
101
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
102
class Client(object):
182
103
"""A representation of a client host served by this server.
183
104
Attributes:
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
105
name: string; from the config file, used in log messages
186
106
fingerprint: string (40 or 32 hexadecimal digits); used to
187
107
uniquely identify the client
188
secret: bytestring; sent verbatim (over TLS) to client
189
host: string; available for use by the checker command
190
created: datetime.datetime(); (UTC) object creation
191
last_enabled: datetime.datetime(); (UTC)
192
enabled: bool()
193
last_checked_ok: datetime.datetime(); (UTC) or None
194
timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
196
interval: datetime.timedelta(); How often to start a new checker
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disable_hook: If set, called by disable() as disable_hook(self)
198
checker: subprocess.Popen(); a running checker process used
199
to see if the client lives.
200
'None' if no process is running.
108
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
114
interval: datetime.timedelta(); How often to start a new checker
115
stop_hook: If set, called by stop() as stop_hook(self)
116
checker: subprocess.Popen(); a running checker process used
117
to see if the client lives.
118
Is None if no process is running.
201
119
checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
120
stop_initiator_tag: - '' -
203
121
checker_callback_tag: - '' -
204
122
checker_command: string; External command which is run to check if
205
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
206
124
runtime with vars(self) as dict, so that for
207
125
instance %(name)s can be used in the command.
208
current_checker_command: string; current running checker_command
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
126
Private attibutes:
127
_timeout: Real variable for 'timeout'
128
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
130
_interval_milliseconds: - '' -
211
131
"""
212
def timeout_milliseconds(self):
213
"Return the 'timeout' attribute in milliseconds"
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
217
218
def interval_milliseconds(self):
219
"Return the 'interval' attribute in milliseconds"
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
223
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
132
def _set_timeout(self, timeout):
133
"Setter function for 'timeout' attribute"
134
self._timeout = timeout
135
self._timeout_milliseconds = ((self.timeout.days
136
* 24 * 60 * 60 * 1000)
137
+ (self.timeout.seconds * 1000)
138
+ (self.timeout.microseconds
139
// 1000))
140
timeout = property(lambda self: self._timeout,
141
_set_timeout)
142
del _set_timeout
143
def _set_interval(self, interval):
144
"Setter function for 'interval' attribute"
145
self._interval = interval
146
self._interval_milliseconds = ((self.interval.days
147
* 24 * 60 * 60 * 1000)
148
+ (self.interval.seconds
149
* 1000)
150
+ (self.interval.microseconds
151
// 1000))
152
interval = property(lambda self: self._interval,
153
_set_interval)
154
del _set_interval
155
def __init__(self, name=None, stop_hook=None, fingerprint=None,
156
secret=None, secfile=None, fqdn=None, timeout=None,
157
interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
229
160
self.name = name
230
if config is None:
231
config = {}
232
161
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
236
# function
237
self.fingerprint = (config["fingerprint"].upper()
238
.replace(u" ", u""))
162
# Uppercase and remove spaces from fingerprint
163
# for later comparison purposes with return value of
164
# the fingerprint() function
165
self.fingerprint = fingerprint.upper().replace(u" ", u"")
239
166
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
with closing(open(os.path.expanduser
244
(os.path.expandvars
245
(config["secfile"])))) as secfile:
246
self.secret = secfile.read()
167
if secret:
168
self.secret = secret.decode(u"base64")
169
elif secfile:
170
sf = open(secfile)
171
self.secret = sf.read()
172
sf.close()
247
173
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.utcnow()
252
self.enabled = False
253
self.last_enabled = None
254
self.last_checked_ok = None
255
self.timeout = string_to_delta(config["timeout"])
256
self.interval = string_to_delta(config["interval"])
257
self.disable_hook = disable_hook
174
raise RuntimeError(u"No secret or secfile for client %s"
175
% self.name)
176
self.fqdn = fqdn # string
177
self.created = datetime.datetime.now()
178
self.last_seen = None
179
self.timeout = string_to_delta(timeout)
180
self.interval = string_to_delta(interval)
181
self.stop_hook = stop_hook
258
182
self.checker = None
259
183
self.checker_initiator_tag = None
260
self.disable_initiator_tag = None
184
self.stop_initiator_tag = None
261
185
self.checker_callback_tag = None
262
self.checker_command = config["checker"]
263
self.current_checker_command = None
264
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
274
275
def enable(self):
186
self.check_command = checker
187
def start(self):
276
188
"""Start this client's checker and timeout hooks"""
277
self.last_enabled = datetime.datetime.utcnow()
278
189
# Schedule a new checker to be started an 'interval' from now,
279
190
# and every interval from then on.
280
self.checker_initiator_tag = (gobject.timeout_add
281
(self.interval_milliseconds(),
282
self.start_checker))
191
self.checker_initiator_tag = gobject.timeout_add\
192
(self._interval_milliseconds,
193
self.start_checker)
283
194
# Also start a new checker *right now*.
284
195
self.start_checker()
285
# Schedule a disable() when 'timeout' has passed
286
self.disable_initiator_tag = (gobject.timeout_add
287
(self.timeout_milliseconds(),
288
self.disable))
289
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
297
298
def disable(self):
299
"""Disable this client."""
300
if not getattr(self, "enabled", False):
196
# Schedule a stop() when 'timeout' has passed
197
self.stop_initiator_tag = gobject.timeout_add\
198
(self._timeout_milliseconds,
199
self.stop)
200
def stop(self):
201
"""Stop this client.
202
The possibility that this client might be restarted is left
203
open, but not currently used."""
204
# If this client doesn't have a secret, it is already stopped.
205
if self.secret:
206
logger.debug(u"Stopping client %s", self.name)
207
self.secret = None
208
else:
301
209
return False
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, "disable_initiator_tag", False):
304
gobject.source_remove(self.disable_initiator_tag)
305
self.disable_initiator_tag = None
306
if getattr(self, "checker_initiator_tag", False):
210
if hasattr(self, "stop_initiator_tag") \
211
and self.stop_initiator_tag:
212
gobject.source_remove(self.stop_initiator_tag)
213
self.stop_initiator_tag = None
214
if hasattr(self, "checker_initiator_tag") \
215
and self.checker_initiator_tag:
307
216
gobject.source_remove(self.checker_initiator_tag)
308
217
self.checker_initiator_tag = None
309
218
self.stop_checker()
310
if self.disable_hook:
311
self.disable_hook(self)
312
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
219
if self.stop_hook:
220
self.stop_hook(self)
317
221
# Do not run this again if called by a gobject.timeout_add
318
222
return False
319
320
223
def __del__(self):
321
self.disable_hook = None
322
self.disable()
323
324
def checker_callback(self, pid, condition, command):
224
self.stop_hook = None
225
self.stop()
226
def checker_callback(self, pid, condition):
325
227
"""The checker has completed, so take appropriate actions."""
228
now = datetime.datetime.now()
326
229
self.checker_callback_tag = None
327
230
self.checker = None
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
332
if os.WIFEXITED(condition):
333
exitstatus = os.WEXITSTATUS(condition)
334
if exitstatus == 0:
335
logger.info(u"Checker for %(name)s succeeded",
336
vars(self))
337
self.checked_ok()
338
else:
339
logger.info(u"Checker for %(name)s failed",
340
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
346
else:
231
if os.WIFEXITED(condition) \
232
and (os.WEXITSTATUS(condition) == 0):
233
logger.debug(u"Checker for %(name)s succeeded",
234
vars(self))
235
self.last_seen = now
236
gobject.source_remove(self.stop_initiator_tag)
237
self.stop_initiator_tag = gobject.timeout_add\
238
(self._timeout_milliseconds,
239
self.stop)
240
elif not os.WIFEXITED(condition):
347
241
logger.warning(u"Checker for %(name)s crashed?",
348
242
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
354
355
def checked_ok(self):
356
"""Bump up the timeout for this client.
357
This should only be called when the client has been seen,
358
alive and well.
359
"""
360
self.last_checked_ok = datetime.datetime.utcnow()
361
gobject.source_remove(self.disable_initiator_tag)
362
self.disable_initiator_tag = (gobject.timeout_add
363
(self.timeout_milliseconds(),
364
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
371
243
else:
244
logger.debug(u"Checker for %(name)s failed",
245
vars(self))
372
246
def start_checker(self):
373
247
"""Start a new checker subprocess if one is not running.
374
248
If a checker already exists, leave it running and do
381
255
# checkers alone, the checker would have to take more time
382
256
# than 'timeout' for the client to be declared invalid, which
383
257
# is as it should be.
384
385
# If a checker exists, make sure it is not a zombie
386
if self.checker is not None:
387
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
388
if pid:
389
logger.warning("Checker was a zombie")
390
gobject.source_remove(self.checker_callback_tag)
391
self.checker_callback(pid, status,
392
self.current_checker_command)
393
# Start a new checker if needed
394
258
if self.checker is None:
395
259
try:
396
# In case checker_command has exactly one % operator
397
command = self.checker_command % self.host
260
command = self.check_command % self.fqdn
398
261
except TypeError:
399
# Escape attributes for the shell
400
262
escaped_attrs = dict((key, re.escape(str(val)))
401
263
for key, val in
402
264
vars(self).iteritems())
403
265
try:
404
command = self.checker_command % escaped_attrs
266
command = self.check_command % escaped_attrs
405
267
except TypeError, error:
406
logger.error(u'Could not format string "%s":'
407
u' %s', self.checker_command, error)
268
logger.critical(u'Could not format string "%s":'
269
u' %s', self.check_command, error)
408
270
return True # Try again later
409
self.current_checker_command = command
410
271
try:
411
logger.info(u"Starting checker %r for %s",
412
command, self.name)
413
# We don't need to redirect stdout and stderr, since
414
# in normal mode, that is already done by daemon(),
415
# and in debug mode we don't want to. (Stdin is
416
# always replaced by /dev/null.)
417
self.checker = subprocess.Popen(command,
418
close_fds=True,
419
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
426
self.checker_callback_tag = (gobject.child_watch_add
427
(self.checker.pid,
428
self.checker_callback,
429
data=command))
430
# The checker may have completed before the gobject
431
# watch was added. Check for this.
432
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
433
if pid:
434
gobject.source_remove(self.checker_callback_tag)
435
self.checker_callback(pid, status, command)
436
except OSError, error:
272
logger.debug(u"Starting checker %r for %s",
273
command, self.name)
274
self.checker = subprocess.\
275
Popen(command,
276
close_fds=True, shell=True,
277
cwd="/")
278
self.checker_callback_tag = gobject.child_watch_add\
279
(self.checker.pid,
280
self.checker_callback)
281
except subprocess.OSError, error:
437
282
logger.error(u"Failed to start subprocess: %s",
438
283
error)
439
284
# Re-run this periodically if run by gobject.timeout_add
440
285
return True
441
442
286
def stop_checker(self):
443
287
"""Force the checker process, if any, to stop."""
444
288
if self.checker_callback_tag:
445
289
gobject.source_remove(self.checker_callback_tag)
446
290
self.checker_callback_tag = None
447
if getattr(self, "checker", None) is None:
291
if not hasattr(self, "checker") or self.checker is None:
448
292
return
449
logger.debug(u"Stopping checker for %(name)s", vars(self))
293
logger.debug("Stopping checker for %(name)s", vars(self))
450
294
try:
451
295
os.kill(self.checker.pid, signal.SIGTERM)
452
296
#os.sleep(0.5)
453
297
#if self.checker.poll() is None:
454
298
# os.kill(self.checker.pid, signal.SIGKILL)
455
299
except OSError, error:
456
if error.errno != errno.ESRCH: # No such process
300
if error.errno != errno.ESRCH:
457
301
raise
458
302
self.checker = None
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
462
463
def still_valid(self):
303
def still_valid(self, now=None):
464
304
"""Has the timeout not yet passed for this client?"""
465
if not getattr(self, "enabled", False):
466
return False
467
now = datetime.datetime.utcnow()
468
if self.last_checked_ok is None:
305
if now is None:
306
now = datetime.datetime.now()
307
if self.last_seen is None:
469
308
return now < (self.created + self.timeout)
470
309
else:
471
return now < (self.last_checked_ok + self.timeout)
472
473
## D-Bus methods & signals
474
_interface = u"se.bsnet.fukt.Mandos.Client"
475
476
# CheckedOK - method
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
479
480
# CheckerCompleted - signal
481
@dbus.service.signal(_interface, signature="nxs")
482
def CheckerCompleted(self, exitcode, waitstatus, command):
483
"D-Bus signal"
484
pass
485
486
# CheckerStarted - signal
487
@dbus.service.signal(_interface, signature="s")
488
def CheckerStarted(self, command):
489
"D-Bus signal"
490
pass
491
492
# GetAllProperties - method
493
@dbus.service.method(_interface, out_signature="a{sv}")
494
def GetAllProperties(self):
495
"D-Bus method"
496
return dbus.Dictionary({
497
dbus.String("name"):
498
dbus.String(self.name, variant_level=1),
499
dbus.String("fingerprint"):
500
dbus.String(self.fingerprint, variant_level=1),
501
dbus.String("host"):
502
dbus.String(self.host, variant_level=1),
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
508
if self.last_enabled is not None
509
else dbus.Boolean(False, variant_level=1)),
510
dbus.String("enabled"):
511
dbus.Boolean(self.enabled, variant_level=1),
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
515
if self.last_checked_ok is not None
516
else dbus.Boolean (False, variant_level=1)),
517
dbus.String("timeout"):
518
dbus.UInt64(self.timeout_milliseconds(),
519
variant_level=1),
520
dbus.String("interval"):
521
dbus.UInt64(self.interval_milliseconds(),
522
variant_level=1),
523
dbus.String("checker"):
524
dbus.String(self.checker_command,
525
variant_level=1),
526
dbus.String("checker_running"):
527
dbus.Boolean(self.checker is not None,
528
variant_level=1),
529
dbus.String("object_path"):
530
dbus.ObjectPath(self.dbus_object_path,
531
variant_level=1)
532
}, signature="sv")
533
534
# IsStillValid - method
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
538
539
# PropertyChanged - signal
540
@dbus.service.signal(_interface, signature="sv")
541
def PropertyChanged(self, property, value):
542
"D-Bus signal"
543
pass
544
545
# SetChecker - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetChecker(self, checker):
548
"D-Bus setter method"
549
self.checker_command = checker
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"checker"),
552
dbus.String(self.checker_command,
553
variant_level=1))
554
555
# SetHost - method
556
@dbus.service.method(_interface, in_signature="s")
557
def SetHost(self, host):
558
"D-Bus setter method"
559
self.host = host
560
# Emit D-Bus signal
561
self.PropertyChanged(dbus.String(u"host"),
562
dbus.String(self.host, variant_level=1))
563
564
# SetInterval - method
565
@dbus.service.method(_interface, in_signature="t")
566
def SetInterval(self, milliseconds):
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
# Emit D-Bus signal
569
self.PropertyChanged(dbus.String(u"interval"),
570
(dbus.UInt64(self.interval_milliseconds(),
571
variant_level=1)))
572
573
# SetSecret - method
574
@dbus.service.method(_interface, in_signature="ay",
575
byte_arrays=True)
576
def SetSecret(self, secret):
577
"D-Bus setter method"
578
self.secret = str(secret)
579
580
# SetTimeout - method
581
@dbus.service.method(_interface, in_signature="t")
582
def SetTimeout(self, milliseconds):
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
# Emit D-Bus signal
585
self.PropertyChanged(dbus.String(u"timeout"),
586
(dbus.UInt64(self.timeout_milliseconds(),
587
variant_level=1)))
588
589
# Enable - method
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
592
593
# StartChecker - method
594
@dbus.service.method(_interface)
595
def StartChecker(self):
596
"D-Bus method"
597
self.start_checker()
598
599
# Disable - method
600
@dbus.service.method(_interface)
601
def Disable(self):
602
"D-Bus method"
603
self.disable()
604
605
# StopChecker - method
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
608
609
del _interface
310
return now < (self.last_seen + self.timeout)
610
311
611
312
612
313
def peer_certificate(session):
613
314
"Return the peer's OpenPGP certificate as a bytestring"
614
315
# If not an OpenPGP certificate...
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
316
if gnutls.library.functions.gnutls_certificate_type_get\
317
(session._c_object) \
318
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
618
319
# ...do the normal thing
619
320
return session.peer_certificate
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
321
list_size = ctypes.c_uint()
322
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
323
(session._c_object, ctypes.byref(list_size))
627
324
if list_size.value == 0:
628
325
return None
629
326
cert = cert_list[0]
632
329
633
330
def fingerprint(openpgp):
634
331
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
641
332
# New empty GnuTLS certificate
642
333
crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
(gnutls.library.functions
644
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
334
gnutls.library.functions.gnutls_openpgp_crt_init\
335
(ctypes.byref(crt))
336
# New GnuTLS "datum" with the OpenPGP public key
337
datum = gnutls.library.types.gnutls_datum_t\
338
(ctypes.cast(ctypes.c_char_p(openpgp),
339
ctypes.POINTER(ctypes.c_ubyte)),
340
ctypes.c_uint(len(openpgp)))
645
341
# Import the OpenPGP public key into the certificate
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
650
# Verify the self signature in the key
651
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
if crtverify.value != 0:
655
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
raise gnutls.errors.CertificateSecurityError("Verify failed")
342
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
343
(crt,
344
ctypes.byref(datum),
345
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
657
346
# New buffer for the fingerprint
658
buf = ctypes.create_string_buffer(20)
659
buf_len = ctypes.c_size_t()
347
buffer = ctypes.create_string_buffer(20)
348
buffer_length = ctypes.c_size_t()
660
349
# Get the fingerprint from the certificate into the buffer
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
350
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
351
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
664
352
# Deinit the certificate
665
353
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
354
# Convert the buffer to a Python bytestring
667
fpr = ctypes.string_at(buf, buf_len.value)
355
fpr = ctypes.string_at(buffer, buffer_length.value)
668
356
# Convert the bytestring to hexadecimal notation
669
357
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
358
return hex_fpr
671
359
672
360
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
361
class tcp_handler(SocketServer.BaseRequestHandler, object):
674
362
"""A TCP request handler class.
675
363
Instantiated by IPv6_TCPServer for each request to handle it.
676
364
Note: This will run in its own forked process."""
677
365
678
366
def handle(self):
679
logger.info(u"TCP connection from: %s",
680
unicode(self.client_address))
681
session = (gnutls.connection
682
.ClientSession(self.request,
683
gnutls.connection
684
.X509Credentials()))
685
686
line = self.request.makefile().readline()
687
logger.debug(u"Protocol version: %r", line)
688
try:
689
if int(line.strip().split()[0]) > 1:
690
raise RuntimeError
691
except (ValueError, IndexError, RuntimeError), error:
692
logger.error(u"Unknown protocol version: %s", error)
693
return
694
695
# Note: gnutls.connection.X509Credentials is really a generic
696
# GnuTLS certificate credentials object so long as no X.509
697
# keys are added to it. Therefore, we can use it here despite
698
# using OpenPGP certificates.
367
logger.debug(u"TCP connection from: %s",
368
unicode(self.client_address))
369
session = gnutls.connection.ClientSession(self.request,
370
gnutls.connection.\
371
X509Credentials())
699
372
700
373
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
# "+DHE-DSS"))
703
# Use a fallback default, since this MUST be set.
704
priority = self.server.settings.get("priority", "NORMAL")
705
(gnutls.library.functions
706
.gnutls_priority_set_direct(session._c_object,
707
priority, None))
374
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
375
# "+DHE-DSS"))
376
priority = "NORMAL"
377
if self.server.options.priority:
378
priority = self.server.options.priority
379
gnutls.library.functions.gnutls_priority_set_direct\
380
(session._c_object, priority, None);
708
381
709
382
try:
710
383
session.handshake()
711
384
except gnutls.errors.GNUTLSError, error:
712
logger.warning(u"Handshake failed: %s", error)
385
logger.debug(u"Handshake failed: %s", error)
713
386
# Do not run session.bye() here: the session is not
714
387
# established. Just abandon the request.
715
388
return
716
logger.debug(u"Handshake succeeded")
717
389
try:
718
390
fpr = fingerprint(peer_certificate(session))
719
391
except (TypeError, gnutls.errors.GNUTLSError), error:
720
logger.warning(u"Bad certificate: %s", error)
392
logger.debug(u"Bad certificate: %s", error)
721
393
session.bye()
722
394
return
723
395
logger.debug(u"Fingerprint: %s", fpr)
724
396
client = None
725
397
for c in self.server.clients:
726
398
if c.fingerprint == fpr:
727
399
client = c
728
400
break
729
else:
730
logger.warning(u"Client not found for fingerprint: %s",
731
fpr)
732
session.bye()
733
return
734
401
# Have to check if client.still_valid(), since it is possible
735
402
# that the client timed out while establishing the GnuTLS
736
403
# session.
737
if not client.still_valid():
738
logger.warning(u"Client %(name)s is invalid",
739
vars(client))
404
if (not client) or (not client.still_valid()):
405
if client:
406
logger.debug(u"Client %(name)s is invalid",
407
vars(client))
408
else:
409
logger.debug(u"Client not found for fingerprint: %s",
410
fpr)
740
411
session.bye()
741
412
return
742
## This won't work here, since we're in a fork.
743
# client.checked_ok()
744
413
sent_size = 0
745
414
while sent_size < len(client.secret):
746
415
sent = session.send(client.secret[sent_size:])
751
420
session.bye()
752
421
753
422
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
SocketServer.TCPServer, object):
756
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
423
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
424
"""IPv6 TCP server. Accepts 'None' as address and/or port.
757
425
Attributes:
758
settings: Server settings
426
options: Command line options
759
427
clients: Set() of Client objects
760
enabled: Boolean; whether this server is activated yet
761
428
"""
762
429
address_family = socket.AF_INET6
763
430
def __init__(self, *args, **kwargs):
764
if "settings" in kwargs:
765
self.settings = kwargs["settings"]
766
del kwargs["settings"]
431
if "options" in kwargs:
432
self.options = kwargs["options"]
433
del kwargs["options"]
767
434
if "clients" in kwargs:
768
435
self.clients = kwargs["clients"]
769
436
del kwargs["clients"]
770
if "use_ipv6" in kwargs:
771
if not kwargs["use_ipv6"]:
772
self.address_family = socket.AF_INET
773
del kwargs["use_ipv6"]
774
self.enabled = False
775
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
437
return super(type(self), self).__init__(*args, **kwargs)
776
438
def server_bind(self):
777
439
"""This overrides the normal server_bind() function
778
440
to bind to an interface if one was specified, and also NOT to
779
441
bind to an address or port if they were not specified."""
780
if self.settings["interface"]:
781
# 25 is from /usr/include/asm-i486/socket.h
782
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
442
if self.options.interface:
443
if not hasattr(socket, "SO_BINDTODEVICE"):
444
# From /usr/include/asm-i486/socket.h
445
socket.SO_BINDTODEVICE = 25
783
446
try:
784
447
self.socket.setsockopt(socket.SOL_SOCKET,
785
SO_BINDTODEVICE,
786
self.settings["interface"])
448
socket.SO_BINDTODEVICE,
449
self.options.interface)
787
450
except socket.error, error:
788
451
if error[0] == errno.EPERM:
789
logger.error(u"No permission to"
790
u" bind to interface %s",
791
self.settings["interface"])
452
logger.warning(u"No permission to"
453
u" bind to interface %s",
454
self.options.interface)
792
455
else:
793
raise
456
raise error
794
457
# Only bind(2) the socket if we really need to.
795
458
if self.server_address[0] or self.server_address[1]:
796
459
if not self.server_address[0]:
797
if self.address_family == socket.AF_INET6:
798
any_address = "::" # in6addr_any
799
else:
800
any_address = socket.INADDR_ANY
801
self.server_address = (any_address,
460
in6addr_any = "::"
461
self.server_address = (in6addr_any,
802
462
self.server_address[1])
803
elif not self.server_address[1]:
463
elif self.server_address[1] is None:
804
464
self.server_address = (self.server_address[0],
805
465
0)
806
# if self.settings["interface"]:
807
# self.server_address = (self.server_address[0],
808
# 0, # port
809
# 0, # flowinfo
810
# if_nametoindex
811
# (self.settings
812
# ["interface"]))
813
return super(IPv6_TCPServer, self).server_bind()
814
def server_activate(self):
815
if self.enabled:
816
return super(IPv6_TCPServer, self).server_activate()
817
def enable(self):
818
self.enabled = True
466
return super(type(self), self).server_bind()
819
467
820
468
821
469
def string_to_delta(interval):
822
470
"""Parse a string and return a datetime.timedelta
823
471
824
472
>>> string_to_delta('7d')
825
473
datetime.timedelta(7)
826
474
>>> string_to_delta('60s')
831
479
datetime.timedelta(1)
832
480
>>> string_to_delta(u'1w')
833
481
datetime.timedelta(7)
834
>>> string_to_delta('5m 30s')
835
datetime.timedelta(0, 330)
836
482
"""
837
timevalue = datetime.timedelta(0)
838
for s in interval.split():
839
try:
840
suffix = unicode(s[-1])
841
value = int(s[:-1])
842
if suffix == u"d":
843
delta = datetime.timedelta(value)
844
elif suffix == u"s":
845
delta = datetime.timedelta(0, value)
846
elif suffix == u"m":
847
delta = datetime.timedelta(0, 0, 0, 0, value)
848
elif suffix == u"h":
849
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
850
elif suffix == u"w":
851
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
852
else:
853
raise ValueError
854
except (ValueError, IndexError):
483
try:
484
suffix=unicode(interval[-1])
485
value=int(interval[:-1])
486
if suffix == u"d":
487
delta = datetime.timedelta(value)
488
elif suffix == u"s":
489
delta = datetime.timedelta(0, value)
490
elif suffix == u"m":
491
delta = datetime.timedelta(0, 0, 0, 0, value)
492
elif suffix == u"h":
493
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
494
elif suffix == u"w":
495
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
496
else:
855
497
raise ValueError
856
timevalue += delta
857
return timevalue
498
except (ValueError, IndexError):
499
raise ValueError
500
return delta
501
502
503
def add_service():
504
"""Derived from the Avahi example code"""
505
global group, serviceName, serviceType, servicePort, serviceTXT, \
506
domain, host
507
if group is None:
508
group = dbus.Interface(
509
bus.get_object( avahi.DBUS_NAME,
510
server.EntryGroupNew()),
511
avahi.DBUS_INTERFACE_ENTRY_GROUP)
512
group.connect_to_signal('StateChanged',
513
entry_group_state_changed)
514
logger.debug(u"Adding service '%s' of type '%s' ...",
515
serviceName, serviceType)
516
517
group.AddService(
518
serviceInterface, # interface
519
avahi.PROTO_INET6, # protocol
520
dbus.UInt32(0), # flags
521
serviceName, serviceType,
522
domain, host,
523
dbus.UInt16(servicePort),
524
avahi.string_array_to_txt_array(serviceTXT))
525
group.Commit()
526
527
528
def remove_service():
529
"""From the Avahi example code"""
530
global group
531
532
if not group is None:
533
group.Reset()
858
534
859
535
860
536
def server_state_changed(state):
861
537
"""Derived from the Avahi example code"""
862
538
if state == avahi.SERVER_COLLISION:
863
logger.error(u"Zeroconf server name collision")
864
service.remove()
539
logger.warning(u"Server name collision")
540
remove_service()
865
541
elif state == avahi.SERVER_RUNNING:
866
service.add()
542
add_service()
867
543
868
544
869
545
def entry_group_state_changed(state, error):
870
546
"""Derived from the Avahi example code"""
871
logger.debug(u"Avahi state change: %i", state)
547
global serviceName, server, rename_count
548
549
logger.debug(u"state change: %i", state)
872
550
873
551
if state == avahi.ENTRY_GROUP_ESTABLISHED:
874
logger.debug(u"Zeroconf service established.")
552
logger.debug(u"Service established.")
875
553
elif state == avahi.ENTRY_GROUP_COLLISION:
876
logger.warning(u"Zeroconf service name collision.")
877
service.rename()
554
555
rename_count = rename_count - 1
556
if rename_count > 0:
557
name = server.GetAlternativeServiceName(name)
558
logger.warning(u"Service name collision, "
559
u"changing name to '%s' ...", name)
560
remove_service()
561
add_service()
562
563
else:
564
logger.error(u"No suitable service name found after %i"
565
u" retries, exiting.", n_rename)
566
killme(1)
878
567
elif state == avahi.ENTRY_GROUP_FAILURE:
879
logger.critical(u"Avahi: Error in group state changed %s",
880
unicode(error))
881
raise AvahiGroupError(u"State changed: %s" % unicode(error))
568
logger.error(u"Error in group state changed %s",
569
unicode(error))
570
killme(1)
571
882
572
883
573
def if_nametoindex(interface):
884
"""Call the C function if_nametoindex(), or equivalent"""
885
global if_nametoindex
574
"""Call the C function if_nametoindex()"""
886
575
try:
887
if_nametoindex = (ctypes.cdll.LoadLibrary
888
(ctypes.util.find_library("c"))
889
.if_nametoindex)
576
libc = ctypes.cdll.LoadLibrary("libc.so.6")
577
return libc.if_nametoindex(interface)
890
578
except (OSError, AttributeError):
891
579
if "struct" not in sys.modules:
892
580
import struct
893
581
if "fcntl" not in sys.modules:
894
582
import fcntl
895
def if_nametoindex(interface):
896
"Get an interface index the hard way, i.e. using fcntl()"
897
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
898
with closing(socket.socket()) as s:
899
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
struct.pack("16s16x", interface))
901
interface_index = struct.unpack("I", ifreq[16:20])[0]
902
return interface_index
903
return if_nametoindex(interface)
904
905
906
def daemon(nochdir = False, noclose = False):
583
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
584
s = socket.socket()
585
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
586
struct.pack("16s16x", interface))
587
s.close()
588
interface_index = struct.unpack("I", ifreq[16:20])[0]
589
return interface_index
590
591
592
def daemon(nochdir, noclose):
907
593
"""See daemon(3). Standard BSD Unix function.
908
594
This should really exist as os.daemon, but it doesn't (yet)."""
909
595
if os.fork():
911
597
os.setsid()
912
598
if not nochdir:
913
599
os.chdir("/")
914
if os.fork():
915
sys.exit()
916
600
if not noclose:
917
601
# Close all standard open file descriptors
918
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
602
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
919
603
if not stat.S_ISCHR(os.fstat(null).st_mode):
920
604
raise OSError(errno.ENODEV,
921
605
"/dev/null not a character device")
926
610
os.close(null)
927
611
928
612
613
def killme(status = 0):
614
logger.debug("Stopping server with exit status %d", status)
615
exitstatus = status
616
if main_loop_started:
617
main_loop.quit()
618
else:
619
sys.exit(status)
620
621
929
622
def main():
930
parser = optparse.OptionParser(version = "%%prog %s" % version)
623
global exitstatus
624
exitstatus = 0
625
global main_loop_started
626
main_loop_started = False
627
628
parser = OptionParser()
931
629
parser.add_option("-i", "--interface", type="string",
932
metavar="IF", help="Bind to interface IF")
933
parser.add_option("-a", "--address", type="string",
630
default=None, metavar="IF",
631
help="Bind to interface IF")
632
parser.add_option("-a", "--address", type="string", default=None,
934
633
help="Address to listen for requests on")
935
parser.add_option("-p", "--port", type="int",
634
parser.add_option("-p", "--port", type="int", default=None,
936
635
help="Port number to receive requests on")
937
parser.add_option("--check", action="store_true",
636
parser.add_option("--check", action="store_true", default=False,
938
637
help="Run self-test")
939
parser.add_option("--debug", action="store_true",
940
help="Debug mode; run in foreground and log to"
941
" terminal")
942
parser.add_option("--priority", type="string", help="GnuTLS"
943
" priority string (see GnuTLS documentation)")
944
parser.add_option("--servicename", type="string", metavar="NAME",
945
help="Zeroconf service name")
946
parser.add_option("--configdir", type="string",
947
default="/etc/mandos", metavar="DIR",
948
help="Directory to search for configuration"
949
" files")
950
parser.add_option("--no-dbus", action="store_false",
951
dest="use_dbus",
952
help="Do not provide D-Bus system bus"
953
" interface")
954
parser.add_option("--no-ipv6", action="store_false",
955
dest="use_ipv6", help="Do not use IPv6")
956
options = parser.parse_args()[0]
638
parser.add_option("--debug", action="store_true", default=False,
639
help="Debug mode")
640
parser.add_option("--priority", type="string",
641
default="SECURE256",
642
help="GnuTLS priority string"
643
" (see GnuTLS documentation)")
644
parser.add_option("--servicename", type="string",
645
default="Mandos", help="Zeroconf service name")
646
(options, args) = parser.parse_args()
957
647
958
648
if options.check:
959
649
import doctest
960
650
doctest.testmod()
961
651
sys.exit()
962
652
963
# Default values for config file for server-global settings
964
server_defaults = { "interface": "",
965
"address": "",
966
"port": "",
967
"debug": "False",
968
"priority":
969
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
970
"servicename": "Mandos",
971
"use_dbus": "True",
972
"use_ipv6": "True",
973
}
974
975
# Parse config file for server-global settings
976
server_config = ConfigParser.SafeConfigParser(server_defaults)
977
del server_defaults
978
server_config.read(os.path.join(options.configdir, "mandos.conf"))
979
# Convert the SafeConfigParser object to a dict
980
server_settings = server_config.defaults()
981
# Use the appropriate methods on the non-string config options
982
server_settings["debug"] = server_config.getboolean("DEFAULT",
983
"debug")
984
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
985
"use_dbus")
986
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
987
"use_ipv6")
988
if server_settings["port"]:
989
server_settings["port"] = server_config.getint("DEFAULT",
990
"port")
991
del server_config
992
993
# Override the settings from the config file with command line
994
# options, if set.
995
for option in ("interface", "address", "port", "debug",
996
"priority", "servicename", "configdir",
997
"use_dbus", "use_ipv6"):
998
value = getattr(options, option)
999
if value is not None:
1000
server_settings[option] = value
1001
del options
1002
# Now we have our good server settings in "server_settings"
1003
1004
# For convenience
1005
debug = server_settings["debug"]
1006
use_dbus = server_settings["use_dbus"]
1007
use_ipv6 = server_settings["use_ipv6"]
1008
1009
if not debug:
1010
syslogger.setLevel(logging.WARNING)
1011
console.setLevel(logging.WARNING)
1012
1013
if server_settings["servicename"] != "Mandos":
1014
syslogger.setFormatter(logging.Formatter
1015
('Mandos (%s): %%(levelname)s:'
1016
' %%(message)s'
1017
% server_settings["servicename"]))
1018
1019
# Parse config file with clients
1020
client_defaults = { "timeout": "1h",
1021
"interval": "5m",
1022
"checker": "fping -q -- %%(host)s",
1023
"host": "",
1024
}
1025
client_config = ConfigParser.SafeConfigParser(client_defaults)
1026
client_config.read(os.path.join(server_settings["configdir"],
1027
"clients.conf"))
1028
1029
clients = Set()
1030
tcp_server = IPv6_TCPServer((server_settings["address"],
1031
server_settings["port"]),
1032
TCP_handler,
1033
settings=server_settings,
1034
clients=clients, use_ipv6=use_ipv6)
1035
pidfilename = "/var/run/mandos.pid"
1036
try:
1037
pidfile = open(pidfilename, "w")
1038
except IOError:
1039
logger.error("Could not open file %r", pidfilename)
1040
1041
try:
1042
uid = pwd.getpwnam("_mandos").pw_uid
1043
gid = pwd.getpwnam("_mandos").pw_gid
1044
except KeyError:
1045
try:
1046
uid = pwd.getpwnam("mandos").pw_uid
1047
gid = pwd.getpwnam("mandos").pw_gid
1048
except KeyError:
1049
try:
1050
uid = pwd.getpwnam("nobody").pw_uid
1051
gid = pwd.getpwnam("nogroup").pw_gid
1052
except KeyError:
1053
uid = 65534
1054
gid = 65534
1055
try:
1056
os.setgid(gid)
1057
os.setuid(uid)
1058
except OSError, error:
1059
if error[0] != errno.EPERM:
1060
raise error
1061
1062
# Enable all possible GnuTLS debugging
1063
if debug:
1064
# "Use a log level over 10 to enable all debugging options."
1065
# - GnuTLS manual
1066
gnutls.library.functions.gnutls_global_set_log_level(11)
1067
1068
@gnutls.library.types.gnutls_log_func
1069
def debug_gnutls(level, string):
1070
logger.debug("GnuTLS: %s", string[:-1])
1071
1072
(gnutls.library.functions
1073
.gnutls_global_set_log_function(debug_gnutls))
1074
1075
global service
1076
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
service = AvahiService(name = server_settings["servicename"],
1078
servicetype = "_mandos._tcp",
1079
protocol = protocol)
1080
if server_settings["interface"]:
1081
service.interface = (if_nametoindex
1082
(server_settings["interface"]))
653
# Parse config file
654
defaults = { "timeout": "1h",
655
"interval": "5m",
656
"checker": "fping -q -- %%(fqdn)s",
657
}
658
client_config = ConfigParser.SafeConfigParser(defaults)
659
#client_config.readfp(open("global.conf"), "global.conf")
660
client_config.read("mandos-clients.conf")
661
662
global serviceName
663
serviceName = options.servicename;
1083
664
1084
665
global main_loop
1085
666
global bus
1088
669
DBusGMainLoop(set_as_default=True )
1089
670
main_loop = gobject.MainLoop()
1090
671
bus = dbus.SystemBus()
1091
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
avahi.DBUS_PATH_SERVER),
1093
avahi.DBUS_INTERFACE_SERVER)
672
server = dbus.Interface(
673
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
674
avahi.DBUS_INTERFACE_SERVER )
1094
675
# End of Avahi example code
1095
if use_dbus:
1096
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1097
1098
clients.update(Set(Client(name = section,
1099
config
1100
= dict(client_config.items(section)),
1101
use_dbus = use_dbus)
676
677
debug = options.debug
678
679
if debug:
680
console = logging.StreamHandler()
681
# console.setLevel(logging.DEBUG)
682
console.setFormatter(logging.Formatter\
683
('%(levelname)s: %(message)s'))
684
logger.addHandler(console)
685
del console
686
687
clients = Set()
688
def remove_from_clients(client):
689
clients.remove(client)
690
if not clients:
691
logger.debug(u"No clients left, exiting")
692
killme()
693
694
clients.update(Set(Client(name=section,
695
stop_hook = remove_from_clients,
696
**(dict(client_config\
697
.items(section))))
1102
698
for section in client_config.sections()))
1103
if not clients:
1104
logger.warning(u"No clients defined")
1105
1106
if debug:
1107
# Redirect stdin so all checkers get /dev/null
1108
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1109
os.dup2(null, sys.stdin.fileno())
1110
if null > 2:
1111
os.close(null)
1112
else:
1113
# No console logging
1114
logger.removeHandler(console)
1115
# Close all input and output, do double fork, etc.
1116
daemon()
1117
1118
try:
1119
pid = os.getpid()
1120
pidfile.write(str(pid) + "\n")
1121
pidfile.close()
1122
del pidfile
1123
except IOError:
1124
logger.error(u"Could not write to file %r with PID %d",
1125
pidfilename, pid)
1126
except NameError:
1127
# "pidfile" was never created
1128
pass
1129
del pidfilename
699
700
if not debug:
701
daemon(False, False)
1130
702
1131
703
def cleanup():
1132
704
"Cleanup function; run on exit"
1139
711
1140
712
while clients:
1141
713
client = clients.pop()
1142
client.disable_hook = None
1143
client.disable()
714
client.stop_hook = None
715
client.stop()
1144
716
1145
717
atexit.register(cleanup)
1146
718
1147
719
if not debug:
1148
720
signal.signal(signal.SIGINT, signal.SIG_IGN)
1149
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1150
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1151
1152
if use_dbus:
1153
class MandosServer(dbus.service.Object):
1154
"""A D-Bus proxy object"""
1155
def __init__(self):
1156
dbus.service.Object.__init__(self, bus, "/")
1157
_interface = u"se.bsnet.fukt.Mandos"
1158
1159
@dbus.service.signal(_interface, signature="oa{sv}")
1160
def ClientAdded(self, objpath, properties):
1161
"D-Bus signal"
1162
pass
1163
1164
@dbus.service.signal(_interface, signature="os")
1165
def ClientRemoved(self, objpath, name):
1166
"D-Bus signal"
1167
pass
1168
1169
@dbus.service.method(_interface, out_signature="ao")
1170
def GetAllClients(self):
1171
"D-Bus method"
1172
return dbus.Array(c.dbus_object_path for c in clients)
1173
1174
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1175
def GetAllClientsWithProperties(self):
1176
"D-Bus method"
1177
return dbus.Dictionary(
1178
((c.dbus_object_path, c.GetAllProperties())
1179
for c in clients),
1180
signature="oa{sv}")
1181
1182
@dbus.service.method(_interface, in_signature="o")
1183
def RemoveClient(self, object_path):
1184
"D-Bus method"
1185
for c in clients:
1186
if c.dbus_object_path == object_path:
1187
clients.remove(c)
1188
# Don't signal anything except ClientRemoved
1189
c.use_dbus = False
1190
c.disable()
1191
# Emit D-Bus signal
1192
self.ClientRemoved(object_path, c.name)
1193
return
1194
raise KeyError
1195
1196
del _interface
1197
1198
mandos_server = MandosServer()
721
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
722
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
1199
723
1200
724
for client in clients:
1201
if use_dbus:
1202
# Emit D-Bus signal
1203
mandos_server.ClientAdded(client.dbus_object_path,
1204
client.GetAllProperties())
1205
client.enable()
1206
1207
tcp_server.enable()
1208
tcp_server.server_activate()
1209
1210
# Find out what port we got
1211
service.port = tcp_server.socket.getsockname()[1]
1212
if use_ipv6:
1213
logger.info(u"Now listening on address %r, port %d,"
1214
" flowinfo %d, scope_id %d"
1215
% tcp_server.socket.getsockname())
1216
else: # IPv4
1217
logger.info(u"Now listening on address %r, port %d"
1218
% tcp_server.socket.getsockname())
1219
1220
#service.interface = tcp_server.socket.getsockname()[3]
1221
1222
try:
1223
# From the Avahi example code
1224
server.connect_to_signal("StateChanged", server_state_changed)
1225
try:
1226
server_state_changed(server.GetState())
1227
except dbus.exceptions.DBusException, error:
1228
logger.critical(u"DBusException: %s", error)
1229
sys.exit(1)
1230
# End of Avahi example code
1231
1232
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1233
lambda *args, **kwargs:
1234
(tcp_server.handle_request
1235
(*args[2:], **kwargs) or True))
1236
1237
logger.debug(u"Starting main loop")
725
client.start()
726
727
tcp_server = IPv6_TCPServer((options.address, options.port),
728
tcp_handler,
729
options=options,
730
clients=clients)
731
# Find out what random port we got
732
global servicePort
733
servicePort = tcp_server.socket.getsockname()[1]
734
logger.debug(u"Now listening on port %d", servicePort)
735
736
if options.interface is not None:
737
global serviceInterface
738
serviceInterface = if_nametoindex(options.interface)
739
740
# From the Avahi example code
741
server.connect_to_signal("StateChanged", server_state_changed)
742
try:
743
server_state_changed(server.GetState())
744
except dbus.exceptions.DBusException, error:
745
logger.critical(u"DBusException: %s", error)
746
killme(1)
747
# End of Avahi example code
748
749
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
750
lambda *args, **kwargs:
751
tcp_server.handle_request(*args[2:],
752
**kwargs) or True)
753
try:
754
logger.debug("Starting main loop")
755
main_loop_started = True
1238
756
main_loop.run()
1239
except AvahiError, error:
1240
logger.critical(u"AvahiError: %s", error)
1241
sys.exit(1)
1242
757
except KeyboardInterrupt:
1243
758
if debug:
1244
print >> sys.stderr
1245
logger.debug("Server received KeyboardInterrupt")
1246
logger.debug("Server exiting")
759
print
760
761
sys.exit(exitstatus)
1247
762
1248
763
if __name__ == '__main__':
1249
764
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0